Update TODO.md

- Pass around message/conversation values instead of pointers where it
makes more sense, and store values instead of pointers in the globally
(within the TUI) shared `App` (pointers provide no utility here).

- Split conversation persistence into separate conversation/message
  saving stages

TODO.md

@@ -14,7 +14,7 @@
       system prompt, rather than having them in the conversation messages)
     - [ ] Agents may have some form of long term memory management (key-value?
       natural lang?).
-- [ ] Sandboxed python, js interpreter (both useful for different reasons)
+- [ ] Sandboxed python, js interpreters (implemented with containers)
 - [ ] Support for arbitrary external script tools
 - [ ] Search - RAG driven search of existing conversation "hey, remind me of
   the conversation we had six months ago about X")
@@ -23,12 +23,15 @@
 - [ ] Image input
 - [ ] Image output (sixel support?)
 - [ ] Conversation exports to html/pdf/json
+- [ ] Store message generation model
+- [ ] Hidden CoT
+- [ ] Token accounting
 
 ## UI
 - [x] Prettify/normalize tool_call and tool_result outputs so they can be
   shown/optionally hidden in `lmcli view` and `lmcli chat`
+- [x] Conversation deletion in conversations view
 - [ ] User confirmation before calling (some?) tools
-- [ ] Conversation deletion in conversations view
 - [ ] Message deletion, Ctrl+D to delete a message and attach its children to
   its parent, Ctrl+Shift+D to delete a message and its descendents
 - [ ] Show available key bindings and their action in any given view

go.mod

@@ -3,40 +3,41 @@ module git.mlow.ca/mlow/lmcli
 go 1.21
 
 require (
-	github.com/alecthomas/chroma/v2 v2.11.1
+	github.com/alecthomas/chroma/v2 v2.14.0
-	github.com/charmbracelet/bubbles v0.18.0
+	github.com/charmbracelet/bubbles v0.20.0
-	github.com/charmbracelet/bubbletea v0.25.0
+	github.com/charmbracelet/bubbletea v1.1.1
-	github.com/charmbracelet/lipgloss v0.10.0
+	github.com/charmbracelet/lipgloss v0.13.0
 	github.com/muesli/reflow v0.3.0
-	github.com/spf13/cobra v1.8.0
+	github.com/spf13/cobra v1.8.1
 	github.com/sqids/sqids-go v0.4.1
 	gopkg.in/yaml.v3 v3.0.1
-	gorm.io/driver/sqlite v1.5.4
+	gorm.io/driver/sqlite v1.5.6
-	gorm.io/gorm v1.25.5
+	gorm.io/gorm v1.25.12
 )
 
 require (
 	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
-	github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81 // indirect
+	github.com/charmbracelet/x/ansi v0.3.1 // indirect
-	github.com/dlclark/regexp2 v1.10.0 // indirect
+	github.com/charmbracelet/x/term v0.2.0 // indirect
+	github.com/dlclark/regexp2 v1.11.4 // indirect
+	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/kr/pretty v0.3.1 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
-	github.com/mattn/go-isatty v0.0.18 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
-	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
-	github.com/mattn/go-sqlite3 v1.14.18 // indirect
+	github.com/mattn/go-sqlite3 v1.14.23 // indirect
-	github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b // indirect
+	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/muesli/termenv v0.15.2 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	golang.org/x/sync v0.1.0 // indirect
+	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.14.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
-	golang.org/x/term v0.6.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
-	golang.org/x/text v0.3.8 // indirect
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 )

go.sum

@@ -1,25 +1,31 @@
-github.com/alecthomas/assert/v2 v2.2.1 h1:XivOgYcduV98QCahG8T5XTezV5bylXe+lBxLG2K2ink=
+github.com/MakeNowJust/heredoc v1.0.0 h1:cXCdzVdstXyiTqTvfqk9SDHpKNjxuom+DOlyEeQ4pzQ=
-github.com/alecthomas/assert/v2 v2.2.1/go.mod h1:pXcQ2Asjp247dahGEmsZ6ru0UVwnkhktn7S0bBDLxvQ=
+github.com/MakeNowJust/heredoc v1.0.0/go.mod h1:mG5amYoWBHf8vpLOuehzbGGw0EHxpZZ6lCpQ4fNJ8LE=
-github.com/alecthomas/chroma/v2 v2.11.1 h1:m9uUtgcdAwgfFNxuqj7AIG75jD2YmL61BBIJWtdzJPs=
+github.com/alecthomas/assert/v2 v2.7.0 h1:QtqSACNS3tF7oasA8CU6A6sXZSBDqnm7RfpLl9bZqbE=
-github.com/alecthomas/chroma/v2 v2.11.1/go.mod h1:4TQu7gdfuPjSh76j78ietmqh9LiurGF0EpseFXdKMBw=
+github.com/alecthomas/assert/v2 v2.7.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
-github.com/alecthomas/repr v0.2.0 h1:HAzS41CIzNW5syS8Mf9UwXhNH1J9aix/BvDRf1Ml2Yk=
+github.com/alecthomas/chroma/v2 v2.14.0 h1:R3+wzpnUArGcQz7fCETQBzO5n9IMNi13iIs46aU4V9E=
-github.com/alecthomas/repr v0.2.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+github.com/alecthomas/chroma/v2 v2.14.0/go.mod h1:QolEbTfmUHIMVpBqxeDnNBj2uoeI4EbYP4i6n68SG4I=
+github.com/alecthomas/repr v0.4.0 h1:GhI2A8MACjfegCPVq9f1FLvIBS+DrQ2KQBFZP1iFzXc=
+github.com/alecthomas/repr v0.4.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
 github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
 github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
-github.com/charmbracelet/bubbles v0.18.0 h1:PYv1A036luoBGroX6VWjQIE9Syf2Wby2oOl/39KLfy0=
+github.com/charmbracelet/bubbles v0.20.0 h1:jSZu6qD8cRQ6k9OMfR1WlM+ruM8fkPWkHvQWD9LIutE=
-github.com/charmbracelet/bubbles v0.18.0/go.mod h1:08qhZhtIwzgrtBjAcJnij1t1H0ZRjwHyGsy6AL11PSw=
+github.com/charmbracelet/bubbles v0.20.0/go.mod h1:39slydyswPy+uVOHZ5x/GjwVAFkCsV8IIVy+4MhzwwU=
-github.com/charmbracelet/bubbletea v0.25.0 h1:bAfwk7jRz7FKFl9RzlIULPkStffg5k6pNt5dywy4TcM=
+github.com/charmbracelet/bubbletea v1.1.1 h1:KJ2/DnmpfqFtDNVTvYZ6zpPFL9iRCRr0qqKOCvppbPY=
-github.com/charmbracelet/bubbletea v0.25.0/go.mod h1:EN3QDR1T5ZdWmdfDzYcqOCAps45+QIJbLOBxmVNWNNg=
+github.com/charmbracelet/bubbletea v1.1.1/go.mod h1:9Ogk0HrdbHolIKHdjfFpyXJmiCzGwy+FesYkZr7hYU4=
-github.com/charmbracelet/lipgloss v0.10.0 h1:KWeXFSexGcfahHX+54URiZGkBFazf70JNMtwg/AFW3s=
+github.com/charmbracelet/lipgloss v0.13.0 h1:4X3PPeoWEDCMvzDvGmTajSyYPcZM4+y8sCA/SsA3cjw=
-github.com/charmbracelet/lipgloss v0.10.0/go.mod h1:Wig9DSfvANsxqkRsqj6x87irdy123SR4dOXlKa91ciE=
+github.com/charmbracelet/lipgloss v0.13.0/go.mod h1:nw4zy0SBX/F/eAO1cWdcvy6qnkDUxr8Lw7dvFrAIbbY=
-github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81 h1:q2hJAaP1k2wIvVRd/hEHD7lacgqrCPS+k8g1MndzfWY=
+github.com/charmbracelet/x/ansi v0.3.1 h1:CRO6lc/6HCx2/D6S/GZ87jDvRvk6GtPyFP+IljkNtqI=
-github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81/go.mod h1:YynlIjWYF8myEu6sdkwKIvGQq+cOckRm6So2avqoYAk=
+github.com/charmbracelet/x/ansi v0.3.1/go.mod h1:dk73KoMTT5AX5BsX0KrqhsTqAnhZZoCBjs7dGWp4Ktw=
-github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/charmbracelet/x/term v0.2.0 h1:cNB9Ot9q8I711MyZ7myUR5HFWL/lc3OpU8jZ4hwm0x0=
+github.com/charmbracelet/x/term v0.2.0/go.mod h1:GVxgxAbjUrmpvIINHIQnJJKpMlHiZ4cktEQCN6GWyF0=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/dlclark/regexp2 v1.10.0 h1:+/GIL799phkJqYW+3YbOd8LCcbHzT0Pbo8zl70MHsq0=
+github.com/dlclark/regexp2 v1.11.4 h1:rPYF9/LECdNymJufQKmri9gV604RvvABwgOA8un7yAo=
-github.com/dlclark/regexp2 v1.10.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/dlclark/regexp2 v1.11.4/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
+github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
 github.com/hexops/gotextdiff v1.0.3 h1:gitA9+qJrrTCsiCl7+kh75nPqQt1cx4ZkudSTLoUqJM=
 github.com/hexops/gotextdiff v1.0.3/go.mod h1:pSWU5MAI3yDq+fZBTazCSJysOMbxWL1BSow5/V2vxeg=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
@@ -34,17 +40,17 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
 github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
-github.com/mattn/go-isatty v0.0.18 h1:DOKFKCQ7FNG2L1rbrmstDN4QVRdS89Nkh85u68Uwp98=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
-github.com/mattn/go-isatty v0.0.18/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2JC/oIi4=
 github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
 github.com/mattn/go-runewidth v0.0.12/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
-github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
+github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
-github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
-github.com/mattn/go-sqlite3 v1.14.18 h1:JL0eqdCOq6DJVNPSvArO/bIV9/P7fbGrV00LZHc+5aI=
+github.com/mattn/go-sqlite3 v1.14.23 h1:gbShiuAP1W5j9UOksQ06aiiqPMxYecovVGwmTxWtuw0=
-github.com/mattn/go-sqlite3 v1.14.18/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
+github.com/mattn/go-sqlite3 v1.14.23/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
-github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b h1:1XF24mVaiu7u+CFywTdcDo2ie1pzzhwjt6RHqzpMU34=
+github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D264iyp3TiX5OmNcI5cIARiQI=
-github.com/muesli/ansi v0.0.0-20211018074035-2e021307bc4b/go.mod h1:fQuZ0gauxyBcmsdE3ZT4NasjaRdxmbCS0jRHsrWu3Ho=
+github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
 github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
 github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
 github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s=
@@ -59,28 +65,26 @@ github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUc
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/spf13/cobra v1.8.0 h1:7aJaZx1B85qltLMc546zn58BxxfZdR/W22ej9CFoEf0=
+github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
-github.com/spf13/cobra v1.8.0/go.mod h1:WXLWApfZ71AjXPya3WOlMsY9yMs7YeiHhFVlvLyhcho=
+github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/sqids/sqids-go v0.4.1 h1:eQKYzmAZbLlRwHeHYPF35QhgxwZHLnlmVj9AkIj/rrw=
 github.com/sqids/sqids-go v0.4.1/go.mod h1:EMwHuPQgSNFS0A49jESTfIQS+066XQTVhukrzEPScl8=
-golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
+golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
-golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.6.0 h1:clScbb1cHjoCkyRbWwBEUZ5H/tIFu5TAXIqaZD0Gcjw=
+golang.org/x/text v0.18.0 h1:XvMDiNzPAl0jr17s6W9lcaIhGUfUORdGCNsuLmPG224=
-golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
+golang.org/x/text v0.18.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
-golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=
-golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gorm.io/driver/sqlite v1.5.4 h1:IqXwXi8M/ZlPzH/947tn5uik3aYQslP9BVveoax0nV0=
+gorm.io/driver/sqlite v1.5.6 h1:fO/X46qn5NUEEOZtnjJRWRzZMe8nqJiQ9E+0hi+hKQE=
-gorm.io/driver/sqlite v1.5.4/go.mod h1:qxAuCol+2r6PannQDpOP1FP6ag3mKi4esLnB/jHed+4=
+gorm.io/driver/sqlite v1.5.6/go.mod h1:U+J8craQU6Fzkcvu8oLeAQmi50TkwPEhHDEjQZXDah4=
-gorm.io/gorm v1.25.5 h1:zR9lOiiYf09VNh5Q1gphfyia1JpiClIWG9hQaxB/mls=
+gorm.io/gorm v1.25.12 h1:I0u8i2hWQItBq1WfE0o2+WuL9+8L21K9e2HHSTE/0f8=
-gorm.io/gorm v1.25.5/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=
+gorm.io/gorm v1.25.12/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=

pkg/api/api.go

@@ -1,49 +1,126 @@
 package api
 
 import (
-	"context"
+	"encoding/json"
+	"fmt"
 )
 
-type ReplyCallback func(Message)
+type MessageRole string
 
-type Chunk struct {
+const (
-	Content    string
+	MessageRoleSystem     MessageRole = "system"
-	TokenCount uint
+	MessageRoleUser       MessageRole = "user"
+	MessageRoleAssistant  MessageRole = "assistant"
+	MessageRoleToolCall   MessageRole = "tool_call"
+	MessageRoleToolResult MessageRole = "tool_result"
+)
+
+type Message struct {
+	Content     string // TODO: support multi-part messages
+	Role        MessageRole
+	ToolCalls   []ToolCall
+	ToolResults []ToolResult
 }
 
-type RequestParameters struct {
+type ToolSpec struct {
-	Model string
+	Name        string
-
+	Description string
-	MaxTokens   int
+	Parameters  []ToolParameter
-	Temperature float32
+	Impl        func(*ToolSpec, map[string]interface{}) (string, error)
-	TopP        float32
-
-	Toolbox []ToolSpec
 }
 
-type ChatCompletionProvider interface {
+type ToolParameter struct {
-	// CreateChatCompletion requests a response to the provided messages.
+	Name        string   `json:"name"`
-	// Replies are appended to the given replies struct, and the
+	Type        string   `json:"type"` // "string", "integer", "boolean"
-	// complete user-facing response is returned as a string.
+	Required    bool     `json:"required"`
-	CreateChatCompletion(
+	Description string   `json:"description"`
-		ctx context.Context,
+	Enum        []string `json:"enum,omitempty"`
-		params RequestParameters,
-		messages []Message,
-	) (*Message, error)
-
-	// Like CreateChageCompletion, except the response is streamed via
-	// the output channel as it's received.
-	CreateChatCompletionStream(
-		ctx context.Context,
-		params RequestParameters,
-		messages []Message,
-		chunks chan<- Chunk,
-	) (*Message, error)
 }
 
-func IsAssistantContinuation(messages []Message) bool {
+type ToolCall struct {
-	if len(messages) == 0 {
+	ID         string                 `json:"id" yaml:"-"`
-		return false
+	Name       string                 `json:"name" yaml:"tool"`
+	Parameters map[string]interface{} `json:"parameters" yaml:"parameters"`
+}
+
+type ToolResult struct {
+	ToolCallID string `json:"toolCallID" yaml:"-"`
+	ToolName   string `json:"toolName,omitempty" yaml:"tool"`
+	Result     string `json:"result,omitempty" yaml:"result"`
+}
+
+func NewMessageWithAssistant(content string) *Message {
+	return &Message{
+		Role:    MessageRoleAssistant,
+		Content: content,
 	}
-	return messages[len(messages)-1].Role == MessageRoleAssistant
+}
+
+func NewMessageWithToolCalls(content string, toolCalls []ToolCall) *Message {
+	return &Message{
+		Role:      MessageRoleToolCall,
+		Content:   content,
+		ToolCalls: toolCalls,
+	}
+}
+
+func (m MessageRole) IsAssistant() bool {
+	switch m {
+	case MessageRoleAssistant, MessageRoleToolCall:
+		return true
+	}
+	return false
+}
+
+func (m MessageRole) IsUser() bool {
+	switch m {
+	case MessageRoleUser, MessageRoleToolResult:
+		return true
+	}
+	return false
+}
+
+func (m MessageRole) IsSystem() bool {
+	switch m {
+	case MessageRoleSystem:
+		return true
+	}
+	return false
+}
+
+// FriendlyRole returns a human friendly signifier for the message's role.
+func (m MessageRole) FriendlyRole() string {
+	switch m {
+	case MessageRoleUser:
+		return "You"
+	case MessageRoleSystem:
+		return "System"
+	case MessageRoleAssistant:
+		return "Assistant"
+	case MessageRoleToolCall:
+		return "Tool Call"
+	case MessageRoleToolResult:
+		return "Tool Result"
+	default:
+		return string(m)
+	}
+}
+
+// TODO: remove this
+type CallResult struct {
+	Message string `json:"message"`
+	Result  any    `json:"result,omitempty"`
+}
+
+func (r CallResult) ToJson() (string, error) {
+	if r.Message == "" {
+		// When message not supplied, assume success
+		r.Message = "success"
+	}
+
+	jsonBytes, err := json.Marshal(r)
+	if err != nil {
+		return "", fmt.Errorf("Could not marshal CallResult to JSON: %v\n", err)
+	}
+	return string(jsonBytes), nil
 }

pkg/api/conversation.go

@@ -1,11 +0,0 @@
-package api
-
-import "database/sql"
-
-type Conversation struct {
-	ID             uint `gorm:"primaryKey"`
-	ShortName      sql.NullString
-	Title          string
-	SelectedRootID *uint
-	SelectedRoot   *Message `gorm:"foreignKey:SelectedRootID"`
-}

pkg/api/message.go

@@ -1,72 +0,0 @@
-package api
-
-import (
-	"time"
-)
-
-type MessageRole string
-
-const (
-	MessageRoleSystem     MessageRole = "system"
-	MessageRoleUser       MessageRole = "user"
-	MessageRoleAssistant  MessageRole = "assistant"
-	MessageRoleToolCall   MessageRole = "tool_call"
-	MessageRoleToolResult MessageRole = "tool_result"
-)
-
-type Message struct {
-	ID             uint          `gorm:"primaryKey"`
-	ConversationID *uint         `gorm:"index"`
-	Conversation   *Conversation `gorm:"foreignKey:ConversationID"`
-	Content        string
-	Role           MessageRole
-	CreatedAt      time.Time
-	ToolCalls      ToolCalls   // a json array of tool calls (from the model)
-	ToolResults    ToolResults // a json array of tool results
-	ParentID       *uint
-	Parent         *Message  `gorm:"foreignKey:ParentID"`
-	Replies        []Message `gorm:"foreignKey:ParentID"`
-
-	SelectedReplyID *uint
-	SelectedReply   *Message `gorm:"foreignKey:SelectedReplyID"`
-}
-
-func ApplySystemPrompt(m []Message, system string, force bool) []Message {
-	if len(m) > 0 && m[0].Role == MessageRoleSystem {
-		if force {
-			m[0].Content = system
-		}
-		return m
-	} else {
-		return append([]Message{{
-			Role:    MessageRoleSystem,
-			Content: system,
-		}}, m...)
-	}
-}
-
-func (m *MessageRole) IsAssistant() bool {
-	switch *m {
-	case MessageRoleAssistant, MessageRoleToolCall:
-		return true
-	}
-	return false
-}
-
-// FriendlyRole returns a human friendly signifier for the message's role.
-func (m MessageRole) FriendlyRole() string {
-	switch m {
-	case MessageRoleUser:
-		return "You"
-	case MessageRoleSystem:
-		return "System"
-	case MessageRoleAssistant:
-		return "Assistant"
-	case MessageRoleToolCall:
-		return "Tool Call"
-	case MessageRoleToolResult:
-		return "Tool Result"
-	default:
-		return string(m)
-	}
-}

pkg/api/tools.go

@@ -1,98 +0,0 @@
-package api
-
-import (
-	"database/sql/driver"
-	"encoding/json"
-	"fmt"
-)
-
-type ToolSpec struct {
-	Name        string
-	Description string
-	Parameters  []ToolParameter
-	Impl        func(*ToolSpec, map[string]interface{}) (string, error)
-}
-
-type ToolParameter struct {
-	Name        string   `json:"name"`
-	Type        string   `json:"type"` // "string", "integer", "boolean"
-	Required    bool     `json:"required"`
-	Description string   `json:"description"`
-	Enum        []string `json:"enum,omitempty"`
-}
-
-type ToolCall struct {
-	ID         string                 `json:"id" yaml:"-"`
-	Name       string                 `json:"name" yaml:"tool"`
-	Parameters map[string]interface{} `json:"parameters" yaml:"parameters"`
-}
-
-type ToolResult struct {
-	ToolCallID string `json:"toolCallID" yaml:"-"`
-	ToolName   string `json:"toolName,omitempty" yaml:"tool"`
-	Result     string `json:"result,omitempty" yaml:"result"`
-}
-
-type ToolCalls []ToolCall
-
-func (tc *ToolCalls) Scan(value any) (err error) {
-	s := value.(string)
-	if value == nil || s == "" {
-		*tc = nil
-		return
-	}
-	err = json.Unmarshal([]byte(s), tc)
-	return
-}
-
-func (tc ToolCalls) Value() (driver.Value, error) {
-	if len(tc) == 0 {
-		return "", nil
-	}
-	jsonBytes, err := json.Marshal(tc)
-	if err != nil {
-		return "", fmt.Errorf("Could not marshal ToolCalls to JSON: %v\n", err)
-	}
-	return string(jsonBytes), nil
-}
-
-type ToolResults []ToolResult
-
-func (tr *ToolResults) Scan(value any) (err error) {
-	s := value.(string)
-	if value == nil || s == "" {
-		*tr = nil
-		return
-	}
-	err = json.Unmarshal([]byte(s), tr)
-	return
-}
-
-func (tr ToolResults) Value() (driver.Value, error) {
-	if len(tr) == 0 {
-		return "", nil
-	}
-	jsonBytes, err := json.Marshal([]ToolResult(tr))
-	if err != nil {
-		return "", fmt.Errorf("Could not marshal ToolResults to JSON: %v\n", err)
-	}
-	return string(jsonBytes), nil
-}
-
-type CallResult struct {
-	Message string `json:"message"`
-	Result  any    `json:"result,omitempty"`
-}
-
-func (r CallResult) ToJson() (string, error) {
-	if r.Message == "" {
-		// When message not supplied, assume success
-		r.Message = "success"
-	}
-
-	jsonBytes, err := json.Marshal(r)
-	if err != nil {
-		return "", fmt.Errorf("Could not marshal CallResult to JSON: %v\n", err)
-	}
-	return string(jsonBytes), nil
-}

pkg/cmd/chat.go

@@ -6,6 +6,7 @@ import (
 	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
 	"git.mlow.ca/mlow/lmcli/pkg/tui"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
 	"github.com/spf13/cobra"
 )
 
@@ -19,17 +20,30 @@ func ChatCmd(ctx *lmcli.Context) *cobra.Command {
 			if err != nil {
 				return err
 			}
-			shortname := ""
+
-			if len(args) == 1 {
+			var opts []tui.LaunchOption
-				shortname = args[0]
+
-			}
+			list, err := cmd.Flags().GetBool("list")
-			if shortname != ""{
-				_, err := cmdutil.LookupConversationE(ctx, shortname)
 			if err != nil {
 				return err
 			}
+
+			if !list && len(args) == 1 {
+				shortname := args[0]
+				if shortname != ""{
+					conv, err := cmdutil.LookupConversationE(ctx, shortname)
+					if err != nil {
+						return err
 					}
-			err = tui.Launch(ctx, shortname)
+					opts = append(opts, tui.WithInitialConversation(conv))
+				}
+			}
+
+			if list {
+				opts = append(opts, tui.WithInitialView(shared.ViewConversations))
+			}
+
+			err = tui.Launch(ctx, opts...)
 			if err != nil {
 				return fmt.Errorf("Error fetching LLM response: %v", err)
 			}
@@ -40,9 +54,13 @@ func ChatCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
+
+	// -l, --list
+	cmd.Flags().BoolP("list", "l", false, "View/manage conversations")
+
 	applyGenerationFlags(ctx, cmd)
 	return cmd
 }

pkg/cmd/clone.go

@@ -27,7 +27,7 @@ func CloneCmd(ctx *lmcli.Context) *cobra.Command {
 				return err
 			}
 
-			clone, messageCnt, err := ctx.Store.CloneConversation(*toClone)
+			clone, messageCnt, err := ctx.Conversations.CloneConversation(*toClone)
 			if err != nil {
 				return fmt.Errorf("Failed to clone conversation: %v", err)
 			}
@@ -40,7 +40,7 @@ func CloneCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
 	return cmd

pkg/cmd/cmd.go

@@ -83,7 +83,7 @@ func validateGenerationFlags(ctx *lmcli.Context, cmd *cobra.Command) error {
 	if err != nil {
 		return fmt.Errorf("Error parsing --agent: %w", err)
 	}
-	if agent != "" && !slices.Contains(ctx.GetAgents(), agent) {
+	if agent != "" && agent != "none"  && !slices.Contains(ctx.GetAgents(), agent) {
 		return fmt.Errorf("Unknown agent: %s", agent)
 	}
 	return nil

pkg/cmd/continue.go

@@ -29,9 +29,9 @@ func ContinueCmd(ctx *lmcli.Context) *cobra.Command {
 			}
 
 			shortName := args[0]
-			conversation := cmdutil.LookupConversation(ctx, shortName)
+			c := cmdutil.LookupConversation(ctx, shortName)
 
-			messages, err := ctx.Store.PathToLeaf(conversation.SelectedRoot)
+			messages, err := ctx.Conversations.PathToLeaf(c.SelectedRoot)
 			if err != nil {
 				return fmt.Errorf("could not retrieve conversation messages: %v", err)
 			}
@@ -58,7 +58,7 @@ func ContinueCmd(ctx *lmcli.Context) *cobra.Command {
 			lastMessage.Content += strings.TrimRight(continuedOutput.Content, "\n\t ")
 
 			// Update the original message
-			err = ctx.Store.UpdateMessage(lastMessage)
+			err = ctx.Conversations.UpdateMessage(lastMessage)
 			if err != nil {
 				return fmt.Errorf("could not update the last message: %v", err)
 			}
@@ -70,7 +70,7 @@ func ContinueCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
 	applyGenerationFlags(ctx, cmd)

pkg/cmd/edit.go

@@ -22,11 +22,11 @@ func EditCmd(ctx *lmcli.Context) *cobra.Command {
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
 			shortName := args[0]
-			conversation := cmdutil.LookupConversation(ctx, shortName)
+			c := cmdutil.LookupConversation(ctx, shortName)
 
-			messages, err := ctx.Store.PathToLeaf(conversation.SelectedRoot)
+			messages, err := ctx.Conversations.PathToLeaf(c.SelectedRoot)
 			if err != nil {
-				return fmt.Errorf("Could not retrieve messages for conversation: %s", conversation.Title)
+				return fmt.Errorf("Could not retrieve messages for conversation: %s", c.Title)
 			}
 
 			offset, _ := cmd.Flags().GetInt("offset")
@@ -62,11 +62,11 @@ func EditCmd(ctx *lmcli.Context) *cobra.Command {
 			// Update the message in-place
 			inplace, _ := cmd.Flags().GetBool("in-place")
 			if inplace {
-				return ctx.Store.UpdateMessage(&toEdit)
+				return ctx.Conversations.UpdateMessage(&toEdit)
 			}
 
 			// Otherwise, create a branch for the edited message
-			message, _, err := ctx.Store.CloneBranch(toEdit)
+			message, _, err := ctx.Conversations.CloneBranch(toEdit)
 			if err != nil {
 				return err
 			}
@@ -74,11 +74,11 @@ func EditCmd(ctx *lmcli.Context) *cobra.Command {
 			if desiredIdx > 0 {
 				// update selected reply
 				messages[desiredIdx-1].SelectedReply = message
-				err = ctx.Store.UpdateMessage(&messages[desiredIdx-1])
+				err = ctx.Conversations.UpdateMessage(&messages[desiredIdx-1])
 			} else {
 				// update selected root
-				conversation.SelectedRoot = message
+				c.SelectedRoot = message
-				err = ctx.Store.UpdateConversation(conversation)
+				err = ctx.Conversations.UpdateConversation(c)
 			}
 			return err
 		},
@@ -87,7 +87,7 @@ func EditCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
 

pkg/cmd/list.go

@@ -20,9 +20,9 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 		Short:   "List conversations",
 		Long:    `List conversations in order of recent activity`,
 		RunE: func(cmd *cobra.Command, args []string) error {
-			messages, err := ctx.Store.LatestConversationMessages()
+			list, err := ctx.Conversations.LoadConversationList()
 			if err != nil {
-				return fmt.Errorf("Could not fetch conversations: %v", err)
+				return fmt.Errorf("Could not load conversations: %v", err)
 			}
 
 			type Category struct {
@@ -57,12 +57,12 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 
 			all, _ := cmd.Flags().GetBool("all")
 
-			for _, message := range messages {
+			for _, item := range list.Items {
-				messageAge := now.Sub(message.CreatedAt)
+				age := now.Sub(item.LastMessageAt)
 
 				var category string
 				for _, c := range categories {
-					if messageAge < c.cutoff {
+					if age < c.cutoff {
 						category = c.name
 						break
 					}
@@ -70,14 +70,14 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 
 				formatted := fmt.Sprintf(
 					"%s - %s - %s",
-					message.Conversation.ShortName.String,
+					item.ShortName,
-					util.HumanTimeElapsedSince(messageAge),
+					util.HumanTimeElapsedSince(age),
-					message.Conversation.Title,
+					item.Title,
 				)
 
 				categorized[category] = append(
 					categorized[category],
-					ConversationLine{messageAge, formatted},
+					ConversationLine{age, formatted},
 				)
 			}
 
@@ -93,7 +93,7 @@ func ListCmd(ctx *lmcli.Context) *cobra.Command {
 				fmt.Printf("%s:\n", category.name)
 				for _, conv := range conversationLines {
 					if conversationsPrinted >= count && !all {
-						fmt.Printf("%d remaining conversation(s), use --all to view.\n", len(messages)-conversationsPrinted)
+						fmt.Printf("%d remaining conversation(s), use --all to view.\n", list.Total-conversationsPrinted)
 						break outer
 					}
 

pkg/cmd/new.go

@@ -5,6 +5,7 @@ import (
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
 	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
 	"github.com/spf13/cobra"
 )
@@ -25,12 +26,12 @@ func NewCmd(ctx *lmcli.Context) *cobra.Command {
 				return fmt.Errorf("No message was provided.")
 			}
 
-			messages := []api.Message{{
+			messages := []conversation.Message{{
 				Role:    api.MessageRoleUser,
 				Content: input,
 			}}
 
-			conversation, messages, err := ctx.Store.StartConversation(messages...)
+			conversation, messages, err := ctx.Conversations.StartConversation(messages...)
 			if err != nil {
 				return fmt.Errorf("Could not start a new conversation: %v", err)
 			}
@@ -43,7 +44,7 @@ func NewCmd(ctx *lmcli.Context) *cobra.Command {
 			}
 
 			conversation.Title = title
-			err = ctx.Store.UpdateConversation(conversation)
+			err = ctx.Conversations.UpdateConversation(conversation)
 			if err != nil {
 				lmcli.Warn("Could not save conversation title: %v\n", err)
 			}

pkg/cmd/prompt.go

@@ -5,6 +5,7 @@ import (
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
 	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
 	"github.com/spf13/cobra"
 )
@@ -25,7 +26,7 @@ func PromptCmd(ctx *lmcli.Context) *cobra.Command {
 				return fmt.Errorf("No message was provided.")
 			}
 
-			messages := []api.Message{{
+			messages := []conversation.Message{{
 				Role:    api.MessageRoleUser,
 				Content: input,
 			}}

pkg/cmd/remove.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"strings"
 
-	"git.mlow.ca/mlow/lmcli/pkg/api"
 	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
 	"github.com/spf13/cobra"
 )
@@ -23,14 +23,14 @@ func RemoveCmd(ctx *lmcli.Context) *cobra.Command {
 			return nil
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
-			var toRemove []*api.Conversation
+			var toRemove []*conversation.Conversation
 			for _, shortName := range args {
 				conversation := cmdutil.LookupConversation(ctx, shortName)
 				toRemove = append(toRemove, conversation)
 			}
 			var errors []error
 			for _, c := range toRemove {
-				err := ctx.Store.DeleteConversation(c)
+				err := ctx.Conversations.DeleteConversation(c)
 				if err != nil {
 					errors = append(errors, fmt.Errorf("Could not remove conversation %s: %v", c.ShortName.String, err))
 				}
@@ -44,7 +44,7 @@ func RemoveCmd(ctx *lmcli.Context) *cobra.Command {
 			compMode := cobra.ShellCompDirectiveNoFileComp
 			var completions []string
 		outer:
-			for _, completion := range ctx.Store.ConversationShortNameCompletions(toComplete) {
+			for _, completion := range ctx.Conversations.ConversationShortNameCompletions(toComplete) {
 				parts := strings.Split(completion, "\t")
 				for _, arg := range args {
 					if parts[0] == arg {

pkg/cmd/rename.go

@@ -30,7 +30,7 @@ func RenameCmd(ctx *lmcli.Context) *cobra.Command {
 
 			generate, _ := cmd.Flags().GetBool("generate")
 			if generate {
-				messages, err := ctx.Store.PathToLeaf(conversation.SelectedRoot)
+				messages, err := ctx.Conversations.PathToLeaf(conversation.SelectedRoot)
 				if err != nil {
 					return fmt.Errorf("Could not retrieve conversation messages: %v", err)
 				}
@@ -46,7 +46,7 @@ func RenameCmd(ctx *lmcli.Context) *cobra.Command {
 			}
 
 			conversation.Title = title
-			err = ctx.Store.UpdateConversation(conversation)
+			err = ctx.Conversations.UpdateConversation(conversation)
 			if err != nil {
 				lmcli.Warn("Could not update conversation title: %v\n", err)
 			}
@@ -57,7 +57,7 @@ func RenameCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
 

pkg/cmd/reply.go

@@ -5,6 +5,7 @@ import (
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
 	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
 	"github.com/spf13/cobra"
 )
@@ -28,14 +29,14 @@ func ReplyCmd(ctx *lmcli.Context) *cobra.Command {
 			}
 
 			shortName := args[0]
-			conversation := cmdutil.LookupConversation(ctx, shortName)
+			c := cmdutil.LookupConversation(ctx, shortName)
 
 			reply := inputFromArgsOrEditor(args[1:], "# How would you like to reply?\n", "")
 			if reply == "" {
 				return fmt.Errorf("No reply was provided.")
 			}
 
-			cmdutil.HandleConversationReply(ctx, conversation, true, api.Message{
+			cmdutil.HandleConversationReply(ctx, c, true, conversation.Message{
 				Role:    api.MessageRoleUser,
 				Content: reply,
 			})
@@ -46,7 +47,7 @@ func ReplyCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
 

pkg/cmd/retry.go

@@ -28,12 +28,12 @@ func RetryCmd(ctx *lmcli.Context) *cobra.Command {
 			}
 
 			shortName := args[0]
-			conversation := cmdutil.LookupConversation(ctx, shortName)
+			c := cmdutil.LookupConversation(ctx, shortName)
 
 			// Load the complete thread from the root message
-			messages, err := ctx.Store.PathToLeaf(conversation.SelectedRoot)
+			messages, err := ctx.Conversations.PathToLeaf(c.SelectedRoot)
 			if err != nil {
-				return fmt.Errorf("Could not retrieve messages for conversation: %s", conversation.Title)
+				return fmt.Errorf("Could not retrieve messages for conversation: %s", c.Title)
 			}
 
 			offset, _ := cmd.Flags().GetInt("offset")
@@ -67,7 +67,7 @@ func RetryCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
 

pkg/cmd/util/util.go

@@ -9,6 +9,8 @@ import (
 	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
 	"git.mlow.ca/mlow/lmcli/pkg/util"
 	"github.com/charmbracelet/lipgloss"
@@ -16,13 +18,13 @@ import (
 
 // Prompt prompts the configured the configured model and streams the response
 // to stdout. Returns all model reply messages.
-func Prompt(ctx *lmcli.Context, messages []api.Message, callback func(api.Message)) (*api.Message, error) {
+func Prompt(ctx *lmcli.Context, messages []conversation.Message, callback func(conversation.Message)) (*api.Message, error) {
-	m, provider, err := ctx.GetModelProvider(*ctx.Config.Defaults.Model)
+	m, _, p, err := ctx.GetModelProvider(*ctx.Config.Defaults.Model, "")
 	if err != nil {
 		return nil, err
 	}
 
-	params := api.RequestParameters{
+	params := provider.RequestParameters{
 		Model:       m,
 		MaxTokens:   *ctx.Config.Defaults.MaxTokens,
 		Temperature: *ctx.Config.Defaults.Temperature,
@@ -39,17 +41,17 @@ func Prompt(ctx *lmcli.Context, messages []api.Message, callback func(api.Messag
 	}
 
 	if system != "" {
-		messages = api.ApplySystemPrompt(messages, system, false)
+		messages = conversation.ApplySystemPrompt(messages, system, false)
 	}
 
-	content := make(chan api.Chunk)
+	content := make(chan provider.Chunk)
 	defer close(content)
 
 	// render the content received over the channel
 	go ShowDelayedContent(content)
 
-	reply, err := provider.CreateChatCompletionStream(
+	reply, err := p.CreateChatCompletionStream(
-		context.Background(), params, messages, content,
+		context.Background(), params, conversation.MessagesToAPI(messages), content,
 	)
 
 	if reply.Content != "" {
@@ -66,8 +68,8 @@ func Prompt(ctx *lmcli.Context, messages []api.Message, callback func(api.Messag
 
 // lookupConversation either returns the conversation found by the
 // short name or exits the program
-func LookupConversation(ctx *lmcli.Context, shortName string) *api.Conversation {
+func LookupConversation(ctx *lmcli.Context, shortName string) *conversation.Conversation {
-	c, err := ctx.Store.ConversationByShortName(shortName)
+	c, err := ctx.Conversations.FindConversationByShortName(shortName)
 	if err != nil {
 		lmcli.Fatal("Could not lookup conversation: %v\n", err)
 	}
@@ -77,8 +79,8 @@ func LookupConversation(ctx *lmcli.Context, shortName string) *api.Conversation
 	return c
 }
 
-func LookupConversationE(ctx *lmcli.Context, shortName string) (*api.Conversation, error) {
+func LookupConversationE(ctx *lmcli.Context, shortName string) (*conversation.Conversation, error) {
-	c, err := ctx.Store.ConversationByShortName(shortName)
+	c, err := ctx.Conversations.FindConversationByShortName(shortName)
 	if err != nil {
 		return nil, fmt.Errorf("Could not lookup conversation: %v", err)
 	}
@@ -88,8 +90,8 @@ func LookupConversationE(ctx *lmcli.Context, shortName string) (*api.Conversatio
 	return c, nil
 }
 
-func HandleConversationReply(ctx *lmcli.Context, c *api.Conversation, persist bool, toSend ...api.Message) {
+func HandleConversationReply(ctx *lmcli.Context, c *conversation.Conversation, persist bool, toSend ...conversation.Message) {
-	messages, err := ctx.Store.PathToLeaf(c.SelectedRoot)
+	messages, err := ctx.Conversations.PathToLeaf(c.SelectedRoot)
 	if err != nil {
 		lmcli.Fatal("Could not load messages: %v\n", err)
 	}
@@ -98,40 +100,40 @@ func HandleConversationReply(ctx *lmcli.Context, c *api.Conversation, persist bo
 
 // handleConversationReply handles sending messages to an existing
 // conversation, optionally persisting both the sent replies and responses.
-func HandleReply(ctx *lmcli.Context, to *api.Message, persist bool, messages ...api.Message) {
+func HandleReply(ctx *lmcli.Context, to *conversation.Message, persist bool, messages ...conversation.Message) {
 	if to == nil {
 		lmcli.Fatal("Can't prompt from an empty message.")
 	}
 
-	existing, err := ctx.Store.PathToRoot(to)
+	existing, err := ctx.Conversations.PathToRoot(to)
 	if err != nil {
 		lmcli.Fatal("Could not load messages: %v\n", err)
 	}
 
 	RenderConversation(ctx, append(existing, messages...), true)
 
-	var savedReplies []api.Message
+	var savedReplies []conversation.Message
 	if persist && len(messages) > 0 {
-		savedReplies, err = ctx.Store.Reply(to, messages...)
+		savedReplies, err = ctx.Conversations.Reply(to, messages...)
 		if err != nil {
 			lmcli.Warn("Could not save messages: %v\n", err)
 		}
 	}
 
 	// render a message header with no contents
-	RenderMessage(ctx, (&api.Message{Role: api.MessageRoleAssistant}))
+	RenderMessage(ctx, (&conversation.Message{Role: api.MessageRoleAssistant}))
 
-	var lastSavedMessage *api.Message
+	var lastSavedMessage *conversation.Message
 	lastSavedMessage = to
 	if len(savedReplies) > 0 {
 		lastSavedMessage = &savedReplies[len(savedReplies)-1]
 	}
 
-	replyCallback := func(reply api.Message) {
+	replyCallback := func(reply conversation.Message) {
 		if !persist {
 			return
 		}
-		savedReplies, err = ctx.Store.Reply(lastSavedMessage, reply)
+		savedReplies, err = ctx.Conversations.Reply(lastSavedMessage, reply)
 		if err != nil {
 			lmcli.Warn("Could not save reply: %v\n", err)
 		}
@@ -144,7 +146,7 @@ func HandleReply(ctx *lmcli.Context, to *api.Message, persist bool, messages ...
 	}
 }
 
-func FormatForExternalPrompt(messages []api.Message, system bool) string {
+func FormatForExternalPrompt(messages []conversation.Message, system bool) string {
 	sb := strings.Builder{}
 	for _, message := range messages {
 		if message.Content == "" {
@@ -163,7 +165,7 @@ func FormatForExternalPrompt(messages []api.Message, system bool) string {
 	return sb.String()
 }
 
-func GenerateTitle(ctx *lmcli.Context, messages []api.Message) (string, error) {
+func GenerateTitle(ctx *lmcli.Context, messages []conversation.Message) (string, error) {
 	const systemPrompt = `You will be shown a conversation between a user and an AI assistant. Your task is to generate a short title (8 words or less) for the provided conversation that reflects the conversation's topic. Your response is expected to be in JSON in the format shown below.
 
 Example conversation:
@@ -188,36 +190,36 @@ Example response:
 	}
 
 	// Serialize the conversation to JSON
-	conversation, err := json.Marshal(msgs)
+	jsonBytes, err := json.Marshal(msgs)
 	if err != nil {
 		return "", err
 	}
 
-	generateRequest := []api.Message{
+	generateRequest := []conversation.Message{
 		{
 			Role:    api.MessageRoleSystem,
 			Content: systemPrompt,
 		},
 		{
 			Role:    api.MessageRoleUser,
-			Content: string(conversation),
+			Content: string(jsonBytes),
 		},
 	}
 
-	m, provider, err := ctx.GetModelProvider(
+	m, _, p, err := ctx.GetModelProvider(
-		*ctx.Config.Conversations.TitleGenerationModel,
+		*ctx.Config.Conversations.TitleGenerationModel, "",
 	)
 	if err != nil {
 		return "", err
 	}
 
-	requestParams := api.RequestParameters{
+	requestParams := provider.RequestParameters{
 		Model:     m,
 		MaxTokens: 25,
 	}
 
-	response, err := provider.CreateChatCompletion(
+	response, err := p.CreateChatCompletion(
-		context.Background(), requestParams, generateRequest,
+		context.Background(), requestParams, conversation.MessagesToAPI(generateRequest),
 	)
 	if err != nil {
 		return "", err
@@ -272,7 +274,7 @@ func ShowWaitAnimation(signal chan any) {
 // chunked) content is received on the channel, the waiting animation is
 // replaced by the content.
 // Blocks until the channel is closed.
-func ShowDelayedContent(content <-chan api.Chunk) {
+func ShowDelayedContent(content <-chan provider.Chunk) {
 	waitSignal := make(chan any)
 	go ShowWaitAnimation(waitSignal)
 
@@ -292,7 +294,7 @@ func ShowDelayedContent(content <-chan api.Chunk) {
 // RenderConversation renders the given messages to TTY, with optional space
 // for a subsequent message. spaceForResponse controls how many '\n' characters
 // are printed immediately after the final message (1 if false, 2 if true)
-func RenderConversation(ctx *lmcli.Context, messages []api.Message, spaceForResponse bool) {
+func RenderConversation(ctx *lmcli.Context, messages []conversation.Message, spaceForResponse bool) {
 	l := len(messages)
 	for i, message := range messages {
 		RenderMessage(ctx, &message)
@@ -303,7 +305,7 @@ func RenderConversation(ctx *lmcli.Context, messages []api.Message, spaceForResp
 	}
 }
 
-func RenderMessage(ctx *lmcli.Context, m *api.Message) {
+func RenderMessage(ctx *lmcli.Context, m *conversation.Message) {
 	var messageAge string
 	if m.CreatedAt.IsZero() {
 		messageAge = "now"

pkg/cmd/view.go

@@ -24,7 +24,7 @@ func ViewCmd(ctx *lmcli.Context) *cobra.Command {
 			shortName := args[0]
 			conversation := cmdutil.LookupConversation(ctx, shortName)
 
-			messages, err := ctx.Store.PathToLeaf(conversation.SelectedRoot)
+			messages, err := ctx.Conversations.PathToLeaf(conversation.SelectedRoot)
 			if err != nil {
 				return fmt.Errorf("Could not retrieve messages for conversation %s: %v", conversation.ShortName.String, err)
 			}
@@ -37,7 +37,7 @@ func ViewCmd(ctx *lmcli.Context) *cobra.Command {
 			if len(args) != 0 {
 				return nil, compMode
 			}
-			return ctx.Store.ConversationShortNameCompletions(toComplete), compMode
+			return ctx.Conversations.ConversationShortNameCompletions(toComplete), compMode
 		},
 	}
 

pkg/conversation/conversation.go

@@ -0,0 +1,99 @@
+package conversation
+
+import (
+	"database/sql"
+	"database/sql/driver"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"git.mlow.ca/mlow/lmcli/pkg/api"
+)
+
+type Conversation struct {
+	ID             uint `gorm:"primaryKey"`
+	ShortName      sql.NullString
+	Title          string
+	SelectedRootID *uint
+	SelectedRoot   *Message  `gorm:"foreignKey:SelectedRootID"`
+	RootMessages   []Message `gorm:"-:all"`
+	LastMessageAt  time.Time
+}
+
+type MessageMeta struct {
+	GenerationProvider *string `json:"generation_provider,omitempty"`
+	GenerationModel    *string `json:"generation_model,omitempty"`
+}
+
+type Message struct {
+	ID        uint `gorm:"primaryKey"`
+	CreatedAt time.Time
+	Metadata  MessageMeta
+
+	ConversationID  *uint         `gorm:"index"`
+	Conversation    *Conversation `gorm:"foreignKey:ConversationID"`
+	ParentID        *uint
+	Parent          *Message  `gorm:"foreignKey:ParentID"`
+	Replies         []Message `gorm:"foreignKey:ParentID"`
+	SelectedReplyID *uint
+	SelectedReply   *Message `gorm:"foreignKey:SelectedReplyID"`
+
+	Role        api.MessageRole
+	Content     string
+	ToolCalls   ToolCalls   // a json array of tool calls (from the model)
+	ToolResults ToolResults // a json array of tool results
+}
+
+func (m *MessageMeta) Scan(value interface{}) error {
+	return json.Unmarshal(value.([]byte), m)
+}
+
+func (m MessageMeta) Value() (driver.Value, error) {
+	return json.Marshal(m)
+}
+
+type ToolCalls []api.ToolCall
+
+func (tc *ToolCalls) Scan(value any) (err error) {
+	s := value.(string)
+	if value == nil || s == "" {
+		*tc = nil
+		return
+	}
+	err = json.Unmarshal([]byte(s), tc)
+	return
+}
+
+func (tc ToolCalls) Value() (driver.Value, error) {
+	if len(tc) == 0 {
+		return "", nil
+	}
+	jsonBytes, err := json.Marshal(tc)
+	if err != nil {
+		return "", fmt.Errorf("Could not marshal ToolCalls to JSON: %v\n", err)
+	}
+	return string(jsonBytes), nil
+}
+
+type ToolResults []api.ToolResult
+
+func (tr *ToolResults) Scan(value any) (err error) {
+	s := value.(string)
+	if value == nil || s == "" {
+		*tr = nil
+		return
+	}
+	err = json.Unmarshal([]byte(s), tr)
+	return
+}
+
+func (tr ToolResults) Value() (driver.Value, error) {
+	if len(tr) == 0 {
+		return "", nil
+	}
+	jsonBytes, err := json.Marshal([]api.ToolResult(tr))
+	if err != nil {
+		return "", fmt.Errorf("Could not marshal ToolResults to JSON: %v\n", err)
+	}
+	return string(jsonBytes), nil
+}

pkg/conversation/repo.go

@@ -1,4 +1,4 @@
-package lmcli
+package conversation
 
 import (
 	"database/sql"
@@ -8,43 +8,57 @@ import (
 	"strings"
 	"time"
 
-	"git.mlow.ca/mlow/lmcli/pkg/api"
 	sqids "github.com/sqids/sqids-go"
 	"gorm.io/gorm"
 )
 
-type ConversationStore interface {
+// Repo exposes low-level message and conversation management. See
-	ConversationByShortName(shortName string) (*api.Conversation, error)
+// Service for high-level helpers
+type Repo interface {
+	LoadConversationList() (ConversationList, error)
+
+	FindConversationByShortName(shortName string) (*Conversation, error)
 	ConversationShortNameCompletions(search string) []string
-	RootMessages(conversationID uint) ([]api.Message, error)
+	GetConversationByID(int uint) (*Conversation, error)
-	LatestConversationMessages() ([]api.Message, error)
+	GetRootMessages(conversationID uint) ([]Message, error)
 
-	StartConversation(messages ...api.Message) (*api.Conversation, []api.Message, error)
+	CreateConversation(title string) (*Conversation, error)
-	UpdateConversation(conversation *api.Conversation) error
+	UpdateConversation(*Conversation) error
-	DeleteConversation(conversation *api.Conversation) error
+	DeleteConversation(*Conversation) error
-	CloneConversation(toClone api.Conversation) (*api.Conversation, uint, error)
+	DeleteConversationById(id uint) error
 
-	MessageByID(messageID uint) (*api.Message, error)
+	GetMessageByID(messageID uint) (*Message, error)
-	MessageReplies(messageID uint) ([]api.Message, error)
 
-	UpdateMessage(message *api.Message) error
+	SaveMessage(message Message) (*Message, error)
-	DeleteMessage(message *api.Message, prune bool) error
+	UpdateMessage(message *Message) error
-	CloneBranch(toClone api.Message) (*api.Message, uint, error)
+	DeleteMessage(message *Message, prune bool) error
-	Reply(to *api.Message, messages ...api.Message) ([]api.Message, error)
+	CloneBranch(toClone Message) (*Message, uint, error)
+	Reply(to *Message, messages ...Message) ([]Message, error)
 
-	PathToRoot(message *api.Message) ([]api.Message, error)
+	PathToRoot(message *Message) ([]Message, error)
-	PathToLeaf(message *api.Message) ([]api.Message, error)
+	PathToLeaf(message *Message) ([]Message, error)
+
+	// Retrieves and return the "selected thread" of the conversation.
+	// The "selected thread" of the conversation is a chain of messages
+	// starting from the Conversation's SelectedRoot Message, following each
+	// Message's SelectedReply until the tail Message is reached.
+	GetSelectedThread(*Conversation) ([]Message, error)
+
+	// Start a new conversation with the given messages
+	StartConversation(messages ...Message) (*Conversation, []Message, error)
+
+	CloneConversation(toClone Conversation) (*Conversation, uint, error)
 }
 
-type SQLStore struct {
+type repo struct {
 	db    *gorm.DB
 	sqids *sqids.Sqids
 }
 
-func NewSQLStore(db *gorm.DB) (*SQLStore, error) {
+func NewRepo(db *gorm.DB) (Repo, error) {
 	models := []any{
-		&api.Conversation{},
+		&Conversation{},
-		&api.Message{},
+		&Message{},
 	}
 
 	for _, x := range models {
@@ -55,13 +69,86 @@ func NewSQLStore(db *gorm.DB) (*SQLStore, error) {
 	}
 
 	_sqids, _ := sqids.New(sqids.Options{MinLength: 4})
-	return &SQLStore{db, _sqids}, nil
+	return &repo{db, _sqids}, nil
 }
 
-func (s *SQLStore) createConversation() (*api.Conversation, error) {
+type ConversationListItem struct {
+	ID            uint
+	ShortName     string
+	Title         string
+	LastMessageAt time.Time
+}
+
+type ConversationList struct {
+	Total int
+	Items []ConversationListItem
+}
+
+// LoadConversationList loads existing conversations, ordered by the date
+// of their latest message, from most recent to oldest.
+func (s *repo) LoadConversationList() (ConversationList, error) {
+	list := ConversationList{}
+
+	var convos []Conversation
+	err := s.db.Order("last_message_at DESC").Find(&convos).Error
+	if err != nil {
+		return list, err
+	}
+
+	for _, c := range convos {
+		list.Items = append(list.Items, ConversationListItem{
+			ID:            c.ID,
+			ShortName:     c.ShortName.String,
+			Title:         c.Title,
+			LastMessageAt: c.LastMessageAt,
+		})
+	}
+
+	list.Total = len(list.Items)
+	return list, nil
+}
+
+func (s *repo) FindConversationByShortName(shortName string) (*Conversation, error) {
+	if shortName == "" {
+		return nil, errors.New("shortName is empty")
+	}
+	var conversation Conversation
+	err := s.db.Preload("SelectedRoot").Where("short_name = ?", shortName).Find(&conversation).Error
+	return &conversation, err
+}
+
+func (s *repo) ConversationShortNameCompletions(shortName string) []string {
+	var conversations []Conversation
+	// ignore error for completions
+	s.db.Find(&conversations)
+	completions := make([]string, 0, len(conversations))
+	for _, conversation := range conversations {
+		if shortName == "" || strings.HasPrefix(conversation.ShortName.String, shortName) {
+			completions = append(completions, fmt.Sprintf("%s\t%s", conversation.ShortName.String, conversation.Title))
+		}
+	}
+	return completions
+}
+
+func (s *repo) GetConversationByID(id uint) (*Conversation, error) {
+	var conversation Conversation
+	err := s.db.Preload("SelectedRoot").Where("id = ?", id).Find(&conversation).Error
+	if err != nil {
+		return nil, fmt.Errorf("Cannot get conversation %d: %v", id, err)
+	}
+
+	rootMessages, err := s.GetRootMessages(id)
+	if err != nil {
+		return nil, fmt.Errorf("Could not load conversation's root messages %d: %v", id, err)
+	}
+	conversation.RootMessages = rootMessages
+	return &conversation, nil
+}
+
+func (s *repo) CreateConversation(title string) (*Conversation, error) {
 	// Create the new conversation
-	c := &api.Conversation{}
+	c := &Conversation{Title: title}
-	err := s.db.Save(c).Error
+	err := s.db.Create(c).Error
 	if err != nil {
 		return nil, err
 	}
@@ -75,159 +162,61 @@ func (s *SQLStore) createConversation() (*api.Conversation, error) {
 	return c, nil
 }
 
-func (s *SQLStore) UpdateConversation(c *api.Conversation) error {
+func (s *repo) UpdateConversation(c *Conversation) error {
 	if c == nil || c.ID == 0 {
 		return fmt.Errorf("Conversation is nil or invalid (missing ID)")
 	}
 	return s.db.Updates(c).Error
 }
 
-func (s *SQLStore) DeleteConversation(c *api.Conversation) error {
+func (s *repo) DeleteConversation(c *Conversation) error {
-	// Delete messages first
+	if c == nil || c.ID == 0 {
-	err := s.db.Where("conversation_id = ?", c.ID).Delete(&api.Message{}).Error
+		return fmt.Errorf("Conversation is nil or invalid (missing ID)")
+	}
+	return s.DeleteConversationById(c.ID)
+}
+
+func (s *repo) DeleteConversationById(id uint) error {
+	if id == 0 {
+		return fmt.Errorf("Invalid conversation ID: %d", id)
+	}
+	err := s.db.Where("conversation_id = ?", id).Delete(&Message{}).Error
 	if err != nil {
 		return err
 	}
-	return s.db.Delete(c).Error
+	return s.db.Where("id = ?", id).Delete(&Conversation{}).Error
 }
 
-func (s *SQLStore) DeleteMessage(message *api.Message, prune bool) error {
+func (s *repo) SaveMessage(m Message) (*Message, error) {
-	panic("Not yet implemented")
+	if m.Conversation == nil {
-	//return s.db.Delete(&message).Error
+		return nil, fmt.Errorf("Can't save a message without a conversation (this is a bug)")
+	}
+	newMessage := m
+	newMessage.ID = 0
+	newMessage.CreatedAt = time.Now()
+	return &newMessage, s.db.Create(&newMessage).Error
 }
 
-func (s *SQLStore) UpdateMessage(m *api.Message) error {
+func (s *repo) UpdateMessage(m *Message) error {
 	if m == nil || m.ID == 0 {
 		return fmt.Errorf("Message is nil or invalid (missing ID)")
 	}
 	return s.db.Updates(m).Error
 }
 
-func (s *SQLStore) ConversationShortNameCompletions(shortName string) []string {
+func (s *repo) DeleteMessage(message *Message, prune bool) error {
-	var conversations []api.Conversation
+	return s.db.Delete(&message).Error
-	// ignore error for completions
-	s.db.Find(&conversations)
-	completions := make([]string, 0, len(conversations))
-	for _, conversation := range conversations {
-		if shortName == "" || strings.HasPrefix(conversation.ShortName.String, shortName) {
-			completions = append(completions, fmt.Sprintf("%s\t%s", conversation.ShortName.String, conversation.Title))
-		}
-	}
-	return completions
 }
 
-func (s *SQLStore) ConversationByShortName(shortName string) (*api.Conversation, error) {
+func (s *repo) GetMessageByID(messageID uint) (*Message, error) {
-	if shortName == "" {
+	var message Message
-		return nil, errors.New("shortName is empty")
-	}
-	var conversation api.Conversation
-	err := s.db.Preload("SelectedRoot").Where("short_name = ?", shortName).Find(&conversation).Error
-	return &conversation, err
-}
-
-func (s *SQLStore) RootMessages(conversationID uint) ([]api.Message, error) {
-	var rootMessages []api.Message
-	err := s.db.Where("conversation_id = ? AND parent_id IS NULL", conversationID).Find(&rootMessages).Error
-	if err != nil {
-		return nil, err
-	}
-	return rootMessages, nil
-}
-
-func (s *SQLStore) MessageByID(messageID uint) (*api.Message, error) {
-	var message api.Message
 	err := s.db.Preload("Parent").Preload("Replies").Preload("SelectedReply").Where("id = ?", messageID).Find(&message).Error
 	return &message, err
 }
 
-func (s *SQLStore) MessageReplies(messageID uint) ([]api.Message, error) {
+// Reply to a message with a series of messages (each followed by the next)
-	var replies []api.Message
+func (s *repo) Reply(to *Message, messages ...Message) ([]Message, error) {
-	err := s.db.Where("parent_id = ?", messageID).Find(&replies).Error
+	var savedMessages []Message
-	return replies, err
-}
-
-// StartConversation starts a new conversation with the provided messages
-func (s *SQLStore) StartConversation(messages ...api.Message) (*api.Conversation, []api.Message, error) {
-	if len(messages) == 0 {
-		return nil, nil, fmt.Errorf("Must provide at least 1 message")
-	}
-
-	// Create new conversation
-	conversation, err := s.createConversation()
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Create first message
-	messages[0].Conversation = conversation
-	err = s.db.Create(&messages[0]).Error
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Update conversation's selected root message
-	conversation.SelectedRoot = &messages[0]
-	err = s.UpdateConversation(conversation)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Add additional replies to conversation
-	if len(messages) > 1 {
-		newMessages, err := s.Reply(&messages[0], messages[1:]...)
-		if err != nil {
-			return nil, nil, err
-		}
-		messages = append([]api.Message{messages[0]}, newMessages...)
-	}
-	return conversation, messages, nil
-}
-
-// CloneConversation clones the given conversation and all of its root meesages
-func (s *SQLStore) CloneConversation(toClone api.Conversation) (*api.Conversation, uint, error) {
-	rootMessages, err := s.RootMessages(toClone.ID)
-	if err != nil {
-		return nil, 0, err
-	}
-
-	clone, err := s.createConversation()
-	if err != nil {
-		return nil, 0, fmt.Errorf("Could not create clone: %s", err)
-	}
-	clone.Title = toClone.Title + " - Clone"
-
-	var errors []error
-	var messageCnt uint = 0
-	for _, root := range rootMessages {
-		messageCnt++
-		newRoot := root
-		newRoot.ConversationID = &clone.ID
-
-		cloned, count, err := s.CloneBranch(newRoot)
-		if err != nil {
-			errors = append(errors, err)
-			continue
-		}
-		messageCnt += count
-
-		if root.ID == *toClone.SelectedRootID {
-			clone.SelectedRootID = &cloned.ID
-			if err := s.UpdateConversation(clone); err != nil {
-				errors = append(errors, fmt.Errorf("Could not set selected root on clone: %v", err))
-			}
-		}
-	}
-
-	if len(errors) > 0 {
-		return nil, 0, fmt.Errorf("Messages failed to be cloned: %v", errors)
-	}
-
-	return clone, messageCnt, nil
-}
-
-// Reply to a message with a series of messages (each following the next)
-func (s *SQLStore) Reply(to *api.Message, messages ...api.Message) ([]api.Message, error) {
-	var savedMessages []api.Message
 
 	err := s.db.Transaction(func(tx *gorm.DB) error {
 		currentParent := to
@@ -256,23 +245,26 @@ func (s *SQLStore) Reply(to *api.Message, messages ...api.Message) ([]api.Messag
 		return nil
 	})
 
+	if err != nil {
+		return savedMessages, err
+	}
+
+	to.Conversation.LastMessageAt = savedMessages[len(savedMessages)-1].CreatedAt
+	err = s.UpdateConversation(to.Conversation)
 	return savedMessages, err
 }
 
 // CloneBranch returns a deep clone of the given message and its replies, returning
 // a new message object. The new message will be attached to the same parent as
 // the messageToClone
-func (s *SQLStore) CloneBranch(messageToClone api.Message) (*api.Message, uint, error) {
+func (s *repo) CloneBranch(messageToClone Message) (*Message, uint, error) {
 	newMessage := messageToClone
 	newMessage.ID = 0
 	newMessage.Replies = nil
 	newMessage.SelectedReplyID = nil
 	newMessage.SelectedReply = nil
 
-	originalReplies, err := s.MessageReplies(messageToClone.ID)
+	originalReplies := messageToClone.Replies
-	if err != nil {
-		return nil, 0, fmt.Errorf("Could not fetch message %d replies: %v", messageToClone.ID, err)
-	}
 
 	if err := s.db.Create(&newMessage).Error; err != nil {
 		return nil, 0, fmt.Errorf("Could not clone message: %s", err)
@@ -304,19 +296,19 @@ func (s *SQLStore) CloneBranch(messageToClone api.Message) (*api.Message, uint,
 	return &newMessage, replyCount, nil
 }
 
-func fetchMessages(db *gorm.DB) ([]api.Message, error) {
+func fetchMessages(db *gorm.DB) ([]Message, error) {
-	var messages []api.Message
+	var messages []Message
 	if err := db.Preload("Conversation").Find(&messages).Error; err != nil {
 		return nil, fmt.Errorf("Could not fetch messages: %v", err)
 	}
 
-	messageMap := make(map[uint]api.Message)
+	messageMap := make(map[uint]Message)
 	for i, message := range messages {
 		messageMap[messages[i].ID] = message
 	}
 
 	// Create a map to store replies by their parent ID
-	repliesMap := make(map[uint][]api.Message)
+	repliesMap := make(map[uint][]Message)
 	for i, message := range messages {
 		if messages[i].ParentID != nil {
 			repliesMap[*messages[i].ParentID] = append(repliesMap[*messages[i].ParentID], message)
@@ -326,7 +318,7 @@ func fetchMessages(db *gorm.DB) ([]api.Message, error) {
 	// Assign replies, parent, and selected reply to each message
 	for i := range messages {
 		if replies, exists := repliesMap[messages[i].ID]; exists {
-			messages[i].Replies = make([]api.Message, len(replies))
+			messages[i].Replies = make([]Message, len(replies))
 			for j, m := range replies {
 				messages[i].Replies[j] = m
 			}
@@ -345,21 +337,51 @@ func fetchMessages(db *gorm.DB) ([]api.Message, error) {
 	return messages, nil
 }
 
-func (s *SQLStore) buildPath(message *api.Message, getNext func(*api.Message) *uint) ([]api.Message, error) {
+func (r repo) GetRootMessages(conversationID uint) ([]Message, error) {
-	var messages []api.Message
+	var rootMessages []Message
+	err := r.db.Where("conversation_id = ? AND parent_id IS NULL", conversationID).Find(&rootMessages).Error
+	if err != nil {
+		return nil, fmt.Errorf("Could not retrieve root messages for conversation %d: %v", conversationID, err)
+	}
+	return rootMessages, nil
+}
+
+func (s *repo) buildPath(message *Message, getNext func(*Message) *uint) ([]Message, error) {
+	var messages []Message
 	messages, err := fetchMessages(s.db.Where("conversation_id = ?", message.ConversationID))
 	if err != nil {
 		return nil, err
 	}
 
 	// Create a map to store messages by their ID
-	messageMap := make(map[uint]*api.Message)
+	messageMap := make(map[uint]*Message, len(messages))
 	for i := range messages {
 		messageMap[messages[i].ID] = &messages[i]
 	}
 
+	// Construct Replies
+	repliesMap := make(map[uint][]*Message, len(messages))
+	for _, m := range messageMap {
+		if m.ParentID == nil {
+			continue
+		}
+		if p, ok := messageMap[*m.ParentID]; ok {
+			repliesMap[p.ID] = append(repliesMap[p.ID], m)
+		}
+	}
+
+	// Add replies to messages
+	for _, m := range messageMap {
+		if replies, ok := repliesMap[m.ID]; ok {
+			m.Replies = make([]Message, len(replies))
+			for idx, reply := range replies {
+				m.Replies[idx] = *reply
+			}
+		}
+	}
+
 	// Build the path
-	var path []api.Message
+	var path []Message
 	nextID := &message.ID
 
 	for {
@@ -382,12 +404,12 @@ func (s *SQLStore) buildPath(message *api.Message, getNext func(*api.Message) *u
 // PathToRoot traverses the provided message's Parent until reaching the tree
 // root and returns a slice of all messages traversed in chronological order
 // (starting with the root and ending with the message provided)
-func (s *SQLStore) PathToRoot(message *api.Message) ([]api.Message, error) {
+func (s *repo) PathToRoot(message *Message) ([]Message, error) {
 	if message == nil || message.ID <= 0 {
 		return nil, fmt.Errorf("Message is nil or has invalid ID")
 	}
 
-	path, err := s.buildPath(message, func(m *api.Message) *uint {
+	path, err := s.buildPath(message, func(m *Message) *uint {
 		return m.ParentID
 	})
 	if err != nil {
@@ -401,33 +423,98 @@ func (s *SQLStore) PathToRoot(message *api.Message) ([]api.Message, error) {
 // PathToLeaf traverses the provided message's SelectedReply until reaching a
 // tree leaf and returns a slice of all messages traversed in chronological
 // order (starting with the message provided and ending with the leaf)
-func (s *SQLStore) PathToLeaf(message *api.Message) ([]api.Message, error) {
+func (s *repo) PathToLeaf(message *Message) ([]Message, error) {
 	if message == nil || message.ID <= 0 {
 		return nil, fmt.Errorf("Message is nil or has invalid ID")
 	}
 
-	return s.buildPath(message, func(m *api.Message) *uint {
+	return s.buildPath(message, func(m *Message) *uint {
 		return m.SelectedReplyID
 	})
 }
 
-func (s *SQLStore) LatestConversationMessages() ([]api.Message, error) {
+func (s *repo) StartConversation(messages ...Message) (*Conversation, []Message, error) {
-	var latestMessages []api.Message
+	if len(messages) == 0 {
-
+		return nil, nil, fmt.Errorf("Must provide at least 1 message")
-	subQuery := s.db.Model(&api.Message{}).
-		Select("MAX(created_at) as max_created_at, conversation_id").
-		Group("conversation_id")
-
-	err := s.db.Model(&api.Message{}).
-		Joins("JOIN (?) as sub on messages.conversation_id = sub.conversation_id AND messages.created_at = sub.max_created_at", subQuery).
-		Group("messages.conversation_id").
-		Order("created_at DESC").
-		Preload("Conversation").
-		Find(&latestMessages).Error
-
-	if err != nil {
-		return nil, err
 	}
 
-	return latestMessages, nil
+	// Create new conversation
+	conversation, err := s.CreateConversation("")
+	if err != nil {
+		return nil, nil, err
+	}
+	messages[0].Conversation = conversation
+
+	// Create first message
+	firstMessage, err := s.SaveMessage(messages[0])
+	if err != nil {
+		return nil, nil, err
+	}
+	messages[0] = *firstMessage
+
+	// Update conversation's selected root message
+	conversation.RootMessages = []Message{messages[0]}
+	conversation.SelectedRoot = &messages[0]
+	conversation.LastMessageAt = messages[0].CreatedAt
+
+	// Add additional replies to conversation
+	if len(messages) > 1 {
+		newMessages, err := s.Reply(&messages[0], messages[1:]...)
+		if err != nil {
+			return nil, nil, err
+		}
+		messages = append([]Message{messages[0]}, newMessages...)
+		conversation.LastMessageAt = messages[len(messages)-1].CreatedAt
+	}
+
+	err = s.UpdateConversation(conversation)
+	return conversation, messages, err
+}
+
+// CloneConversation clones the given conversation and all of its meesages
+func (s *repo) CloneConversation(toClone Conversation) (*Conversation, uint, error) {
+	rootMessages, err := s.GetRootMessages(toClone.ID)
+	if err != nil {
+		return nil, 0, fmt.Errorf("Could not create clone: %v", err)
+	}
+
+	clone, err := s.CreateConversation(toClone.Title + " - Clone")
+	if err != nil {
+		return nil, 0, fmt.Errorf("Could not create clone: %v", err)
+	}
+
+	var errors []error
+	var messageCnt uint = 0
+	for _, root := range rootMessages {
+		messageCnt++
+		newRoot := root
+		newRoot.ConversationID = &clone.ID
+
+		cloned, count, err := s.CloneBranch(newRoot)
+		if err != nil {
+			errors = append(errors, err)
+			continue
+		}
+		messageCnt += count
+
+		if root.ID == *toClone.SelectedRootID {
+			clone.SelectedRootID = &cloned.ID
+			if err := s.UpdateConversation(clone); err != nil {
+				errors = append(errors, fmt.Errorf("Could not set selected root on clone: %v", err))
+			}
+		}
+	}
+
+	if len(errors) > 0 {
+		return nil, 0, fmt.Errorf("Messages failed to be cloned: %v", errors)
+	}
+
+	return clone, messageCnt, nil
+}
+
+func (s *repo) GetSelectedThread(c *Conversation) ([]Message, error) {
+	if c.SelectedRoot == nil {
+		return nil, fmt.Errorf("No SelectedRoot on conversation - this is a bug")
+	}
+	return s.PathToLeaf(c.SelectedRoot)
 }

pkg/conversation/tools.go

@@ -0,0 +1,55 @@
+package conversation
+
+import (
+	"git.mlow.ca/mlow/lmcli/pkg/api"
+)
+
+// ApplySystemPrompt updates the contents of an existing system Message if it
+// exists, or returns a new slice with the system Message prepended.
+func ApplySystemPrompt(m []Message, system string, force bool) []Message {
+	if len(m) > 0 && m[0].Role == api.MessageRoleSystem {
+		if force {
+			m[0].Content = system
+		}
+		return m
+	} else {
+		return append([]Message{{
+			Role:    api.MessageRoleSystem,
+			Content: system,
+		}}, m...)
+	}
+}
+
+func MessageToAPI(m Message) api.Message {
+	return api.Message{
+		Role:        m.Role,
+		Content:     m.Content,
+		ToolCalls:   m.ToolCalls,
+		ToolResults: m.ToolResults,
+	}
+}
+
+func MessagesToAPI(messages []Message) []api.Message {
+	ret := make([]api.Message, 0, len(messages))
+	for _, m := range messages {
+		ret = append(ret, MessageToAPI(m))
+	}
+	return ret
+}
+
+func MessageFromAPI(m api.Message) Message {
+	return Message{
+		Role:        m.Role,
+		Content:     m.Content,
+		ToolCalls:   m.ToolCalls,
+		ToolResults: m.ToolResults,
+	}
+}
+
+func MessagesFromAPI(messages []api.Message) []Message {
+	ret := make([]Message, 0, len(messages))
+	for _, m := range messages {
+		ret = append(ret, MessageFromAPI(m))
+	}
+	return ret
+}

pkg/lmcli/config.go

@@ -15,8 +15,7 @@ type Config struct {
 		Temperature      *float32 `yaml:"temperature" default:"0.2"`
 		SystemPrompt     string   `yaml:"systemPrompt,omitempty"`
 		SystemPromptFile string   `yaml:"systemPromptFile,omitempty"`
-		// CLI only
+		Agent            string   `yaml:"agent"`
-		Agent string `yaml:"-"`
 	} `yaml:"defaults"`
 	Conversations *struct {
 		TitleGenerationModel *string `yaml:"titleGenerationModel" default:"gpt-3.5-turbo"`
@@ -32,10 +31,12 @@ type Config struct {
 	} `yaml:"agents"`
 	Providers []*struct {
 		Name    string            `yaml:"name,omitempty"`
+		Display string            `yaml:"display,omitempty"`
 		Kind    string            `yaml:"kind"`
 		BaseURL string            `yaml:"baseUrl,omitempty"`
 		APIKey  string            `yaml:"apiKey,omitempty"`
 		Models  []string          `yaml:"models"`
+		Headers map[string]string `yaml:"headers"`
 	} `yaml:"providers"`
 }
 

pkg/lmcli/lmcli.go

@@ -1,21 +1,28 @@
 package lmcli
 
 import (
+	"errors"
 	"fmt"
+	"io/fs"
+	"log"
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/agents"
 	"git.mlow.ca/mlow/lmcli/pkg/api"
-	"git.mlow.ca/mlow/lmcli/pkg/api/provider/anthropic"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
-	"git.mlow.ca/mlow/lmcli/pkg/api/provider/google"
+	"git.mlow.ca/mlow/lmcli/pkg/provider/anthropic"
-	"git.mlow.ca/mlow/lmcli/pkg/api/provider/ollama"
+	"git.mlow.ca/mlow/lmcli/pkg/provider/google"
-	"git.mlow.ca/mlow/lmcli/pkg/api/provider/openai"
+	"git.mlow.ca/mlow/lmcli/pkg/provider/ollama"
+	"git.mlow.ca/mlow/lmcli/pkg/provider/openai"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/util"
 	"git.mlow.ca/mlow/lmcli/pkg/util/tty"
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
 )
 
 type Agent struct {
@@ -27,7 +34,7 @@ type Agent struct {
 type Context struct {
 	// high level app configuration, may be mutated at runtime
 	Config Config
-	Store  ConversationStore
+	Conversations conversation.Repo
 	Chroma *tty.ChromaHighlighter
 }
 
@@ -38,23 +45,55 @@ func NewContext() (*Context, error) {
 		return nil, err
 	}
 
-	databaseFile := filepath.Join(dataDir(), "conversations.db")
+	store, err := getConversationService()
-	db, err := gorm.Open(sqlite.Open(databaseFile), &gorm.Config{
-		//Logger: logger.Default.LogMode(logger.Info),
-	})
-	if err != nil {
-		return nil, fmt.Errorf("Error establishing connection to store: %v", err)
-	}
-	store, err := NewSQLStore(db)
 	if err != nil {
 		return nil, err
 	}
 
 	chroma := tty.NewChromaHighlighter("markdown", *config.Chroma.Formatter, *config.Chroma.Style)
-
 	return &Context{*config, store, chroma}, nil
 }
 
+func createOrOpenAppend(path string) (*os.File, error) {
+	var file *os.File
+	if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
+		file, err = os.Create(path)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		file, err = os.OpenFile(path, os.O_APPEND, fs.ModeAppend)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return file, nil
+}
+
+func getConversationService() (conversation.Repo, error) {
+	databaseFile := filepath.Join(dataDir(), "conversations.db")
+	gormLogFile, err := createOrOpenAppend(filepath.Join(dataDir(), "database.log"))
+	if err != nil {
+		return nil, fmt.Errorf("Could not open database log file: %v", err)
+	}
+	db, err := gorm.Open(sqlite.Open(databaseFile), &gorm.Config{
+		Logger: logger.New(log.New(gormLogFile, "\n", log.LstdFlags), logger.Config{
+			SlowThreshold:             200 * time.Millisecond,
+			LogLevel:                  logger.Info,
+			IgnoreRecordNotFoundError: false,
+			Colorful:                  true,
+		}),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("Error establishing connection to store: %v", err)
+	}
+	repo, err := conversation.NewRepo(db)
+	if err != nil {
+		return nil, err
+	}
+	return repo, nil
+}
+
 func (c *Context) GetModels() (models []string) {
 	modelCounts := make(map[string]int)
 	for _, p := range c.Config.Providers {
@@ -86,7 +125,7 @@ func (c *Context) GetAgents() (agents []string) {
 }
 
 func (c *Context) GetAgent(name string) *Agent {
-	if name == "" {
+	if name == "" || name == "none" {
 		return nil
 	}
 
@@ -123,11 +162,10 @@ func (c *Context) DefaultSystemPrompt() string {
 	return c.Config.Defaults.SystemPrompt
 }
 
-func (c *Context) GetModelProvider(model string) (string, api.ChatCompletionProvider, error) {
+func (c *Context) GetModelProvider(model string, provider string) (string, string, provider.ChatCompletionProvider, error) {
 	parts := strings.Split(model, "@")
 
-	var provider string
+	if provider == "" && len(parts) > 1 {
-	if len(parts) > 1 {
 		model = parts[0]
 		provider = parts[1]
 	}
@@ -150,7 +188,7 @@ func (c *Context) GetModelProvider(model string) (string, api.ChatCompletionProv
 					if p.BaseURL != "" {
 						url = p.BaseURL
 					}
-					return model, &anthropic.AnthropicClient{
+					return model, name, &anthropic.AnthropicClient{
 						BaseURL: url,
 						APIKey:  p.APIKey,
 					}, nil
@@ -159,7 +197,7 @@ func (c *Context) GetModelProvider(model string) (string, api.ChatCompletionProv
 					if p.BaseURL != "" {
 						url = p.BaseURL
 					}
-					return model, &google.Client{
+					return model, name, &google.Client{
 						BaseURL: url,
 						APIKey:  p.APIKey,
 					}, nil
@@ -168,7 +206,7 @@ func (c *Context) GetModelProvider(model string) (string, api.ChatCompletionProv
 					if p.BaseURL != "" {
 						url = p.BaseURL
 					}
-					return model, &ollama.OllamaClient{
+					return model, name, &ollama.OllamaClient{
 						BaseURL: url,
 					}, nil
 				case "openai":
@@ -176,17 +214,18 @@ func (c *Context) GetModelProvider(model string) (string, api.ChatCompletionProv
 					if p.BaseURL != "" {
 						url = p.BaseURL
 					}
-					return model, &openai.OpenAIClient{
+					return model, name, &openai.OpenAIClient{
 						BaseURL: url,
 						APIKey:  p.APIKey,
+						Headers: p.Headers,
 					}, nil
 				default:
-					return "", nil, fmt.Errorf("unknown provider kind: %s", p.Kind)
+					return "", "", nil, fmt.Errorf("unknown provider kind: %s", p.Kind)
 				}
 			}
 		}
 	}
-	return "", nil, fmt.Errorf("unknown model: %s", model)
+	return "", "", nil, fmt.Errorf("unknown model: %s", model)
 }
 
 func configDir() string {

pkg/provider/anthropic/anthropic.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
 )
 
 const ANTHROPIC_VERSION = "2023-06-01"
@@ -117,7 +118,7 @@ func convertTools(tools []api.ToolSpec) []Tool {
 }
 
 func createChatCompletionRequest(
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) (string, ChatCompletionRequest) {
 	requestMessages := make([]ChatCompletionMessage, 0, len(messages))
@@ -188,7 +189,8 @@ func createChatCompletionRequest(
 	}
 
 	var prefill string
-	if api.IsAssistantContinuation(messages) {
+	if len(messages) > 0 && messages[len(messages)-1].Role == api.MessageRoleAssistant {
+		// Prompting on an assitant message, use its content as prefill
 		prefill = messages[len(messages)-1].Content
 	}
 
@@ -226,7 +228,7 @@ func (c *AnthropicClient) sendRequest(ctx context.Context, r ChatCompletionReque
 
 func (c *AnthropicClient) CreateChatCompletion(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
@@ -253,9 +255,9 @@ func (c *AnthropicClient) CreateChatCompletion(
 
 func (c *AnthropicClient) CreateChatCompletionStream(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
-	output chan<- api.Chunk,
+	output chan<- provider.Chunk,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
 		return nil, fmt.Errorf("can't create completion from no messages")
@@ -349,9 +351,10 @@ func (c *AnthropicClient) CreateChatCompletionStream(
 							firstChunkReceived = true
 						}
 						block.Text += text
-						output <- api.Chunk{
+						output <- provider.Chunk{
 							Content:    text,
-							TokenCount: 1,
+							// rough, anthropic performs some chunking
+							TokenCount: uint(len(strings.Split(text, " "))),
 						}
 					}
 				case "input_json_delta":
@@ -436,15 +439,9 @@ func convertResponseToMessage(resp ChatCompletionResponse) (*api.Message, error)
 		}
 	}
 
-	message := &api.Message{
-		Role:      api.MessageRoleAssistant,
-		Content:   content.String(),
-		ToolCalls: toolCalls,
-	}
-
 	if len(toolCalls) > 0 {
-		message.Role = api.MessageRoleToolCall
+		return api.NewMessageWithToolCalls(content.String(), toolCalls), nil
 	}
 
-	return message, nil
+	return api.NewMessageWithAssistant(content.String()), nil
 }

pkg/provider/google/google.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
 )
 
 type Client struct {
@@ -172,7 +173,7 @@ func convertToolResultsToGemini(toolResults []api.ToolResult) ([]FunctionRespons
 }
 
 func createGenerateContentRequest(
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) (*GenerateContentRequest, error) {
 	requestContents := make([]Content, 0, len(messages))
@@ -279,7 +280,7 @@ func (c *Client) sendRequest(req *http.Request) (*http.Response, error) {
 
 func (c *Client) CreateChatCompletion(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
@@ -336,24 +337,17 @@ func (c *Client) CreateChatCompletion(
 	}
 
 	if len(toolCalls) > 0 {
-		return &api.Message{
+		return api.NewMessageWithToolCalls(content, convertToolCallToAPI(toolCalls)), nil
-			Role:      api.MessageRoleToolCall,
-			Content:   content,
-			ToolCalls: convertToolCallToAPI(toolCalls),
-		}, nil
 	}
 
-	return &api.Message{
+	return api.NewMessageWithAssistant(content), nil
-		Role:    api.MessageRoleAssistant,
-		Content: content,
-	}, nil
 }
 
 func (c *Client) CreateChatCompletionStream(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
-	output chan<- api.Chunk,
+	output chan<- provider.Chunk,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
 		return nil, fmt.Errorf("Can't create completion from no messages")
@@ -425,7 +419,7 @@ func (c *Client) CreateChatCompletionStream(
 			if part.FunctionCall != nil {
 				toolCalls = append(toolCalls, *part.FunctionCall)
 			} else if part.Text != "" {
-				output <- api.Chunk{
+				output <- provider.Chunk{
 					Content:    part.Text,
 					TokenCount: uint(tokens),
 				}
@@ -434,17 +428,9 @@ func (c *Client) CreateChatCompletionStream(
 		}
 	}
 
-	// If there are function calls, handle them and recurse
 	if len(toolCalls) > 0 {
-		return &api.Message{
+		return api.NewMessageWithToolCalls(content.String(), convertToolCallToAPI(toolCalls)), nil
-			Role:      api.MessageRoleToolCall,
-			Content:   content.String(),
-			ToolCalls: convertToolCallToAPI(toolCalls),
-		}, nil
 	}
 
-	return &api.Message{
+	return api.NewMessageWithAssistant(content.String()), nil
-		Role:    api.MessageRoleAssistant,
-		Content: content.String(),
-	}, nil
 }

pkg/provider/ollama/ollama.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
 )
 
 type OllamaClient struct {
@@ -42,7 +43,7 @@ type OllamaResponse struct {
 }
 
 func createOllamaRequest(
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) OllamaRequest {
 	requestMessages := make([]OllamaMessage, 0, len(messages))
@@ -82,7 +83,7 @@ func (c *OllamaClient) sendRequest(req *http.Request) (*http.Response, error) {
 
 func (c *OllamaClient) CreateChatCompletion(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
@@ -114,17 +115,14 @@ func (c *OllamaClient) CreateChatCompletion(
 		return nil, err
 	}
 
-	return &api.Message{
+	return api.NewMessageWithAssistant(completionResp.Message.Content), nil
-		Role:    api.MessageRoleAssistant,
-		Content: completionResp.Message.Content,
-	}, nil
 }
 
 func (c *OllamaClient) CreateChatCompletionStream(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
-	output chan<- api.Chunk,
+	output chan<- provider.Chunk,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
 		return nil, fmt.Errorf("Can't create completion from no messages")
@@ -173,7 +171,7 @@ func (c *OllamaClient) CreateChatCompletionStream(
 		}
 
 		if len(streamResp.Message.Content) > 0 {
-			output <- api.Chunk{
+			output <- provider.Chunk{
 				Content:    streamResp.Message.Content,
 				TokenCount: 1,
 			}
@@ -181,8 +179,5 @@ func (c *OllamaClient) CreateChatCompletionStream(
 		}
 	}
 
-	return &api.Message{
+	return api.NewMessageWithAssistant(content.String()), nil
-		Role:    api.MessageRoleAssistant,
-		Content: content.String(),
-	}, nil
 }

pkg/provider/openai/openai.go

@@ -11,11 +11,13 @@ import (
 	"strings"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
 )
 
 type OpenAIClient struct {
 	APIKey  string
 	BaseURL string
+	Headers map[string]string
 }
 
 type ChatCompletionMessage struct {
@@ -139,7 +141,7 @@ func convertToolCallToAPI(toolCalls []ToolCall) []api.ToolCall {
 }
 
 func createChatCompletionRequest(
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) ChatCompletionRequest {
 	requestMessages := make([]ChatCompletionMessage, 0, len(messages))
@@ -198,6 +200,9 @@ func (c *OpenAIClient) sendRequest(ctx context.Context, r ChatCompletionRequest)
 
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Authorization", "Bearer "+c.APIKey)
+	for header, val := range c.Headers {
+		req.Header.Set(header, val)
+	}
 
 	client := &http.Client{}
 	resp, err := client.Do(req)
@@ -215,7 +220,7 @@ func (c *OpenAIClient) sendRequest(ctx context.Context, r ChatCompletionRequest)
 
 func (c *OpenAIClient) CreateChatCompletion(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
@@ -248,24 +253,17 @@ func (c *OpenAIClient) CreateChatCompletion(
 
 	toolCalls := choice.Message.ToolCalls
 	if len(toolCalls) > 0 {
-		return &api.Message{
+		return api.NewMessageWithToolCalls(content, convertToolCallToAPI(toolCalls)), nil
-			Role:      api.MessageRoleToolCall,
-			Content:   content,
-			ToolCalls: convertToolCallToAPI(toolCalls),
-		}, nil
 	}
 
-	return &api.Message{
+	return api.NewMessageWithAssistant(content), nil
-		Role:    api.MessageRoleAssistant,
-		Content: content,
-	}, nil
 }
 
 func (c *OpenAIClient) CreateChatCompletionStream(
 	ctx context.Context,
-	params api.RequestParameters,
+	params provider.RequestParameters,
 	messages []api.Message,
-	output chan<- api.Chunk,
+	output chan<- provider.Chunk,
 ) (*api.Message, error) {
 	if len(messages) == 0 {
 		return nil, fmt.Errorf("Can't create completion from no messages")
@@ -329,7 +327,7 @@ func (c *OpenAIClient) CreateChatCompletionStream(
 			}
 		}
 		if len(delta.Content) > 0 {
-			output <- api.Chunk{
+			output <- provider.Chunk{
 				Content:    delta.Content,
 				TokenCount: 1,
 			}
@@ -338,15 +336,8 @@ func (c *OpenAIClient) CreateChatCompletionStream(
 	}
 
 	if len(toolCalls) > 0 {
-		return &api.Message{
+		return api.NewMessageWithToolCalls(content.String(), convertToolCallToAPI(toolCalls)), nil
-			Role:      api.MessageRoleToolCall,
-			Content:   content.String(),
-			ToolCalls: convertToolCallToAPI(toolCalls),
-		}, nil
 	}
 
-	return &api.Message{
+	return api.NewMessageWithAssistant(content.String()), nil
-		Role:    api.MessageRoleAssistant,
-		Content: content.String(),
-	}, nil
 }

pkg/provider/provider.go

@@ -0,0 +1,41 @@
+package provider
+
+import (
+	"context"
+
+	"git.mlow.ca/mlow/lmcli/pkg/api"
+)
+
+type Chunk struct {
+	Content    string
+	TokenCount uint
+}
+
+type RequestParameters struct {
+	Model string
+
+	MaxTokens   int
+	Temperature float32
+	TopP        float32
+
+	Toolbox []api.ToolSpec
+}
+
+type ChatCompletionProvider interface {
+	// CreateChatCompletion generates a chat completion response to the
+	// provided messages.
+	CreateChatCompletion(
+		ctx context.Context,
+		params RequestParameters,
+		messages []api.Message,
+	) (*api.Message, error)
+
+	// Like CreateChageCompletion, except the response is streamed via
+	// the output channel.
+	CreateChatCompletionStream(
+		ctx context.Context,
+		params RequestParameters,
+		messages []api.Message,
+		chunks chan<- Chunk,
+	) (*api.Message, error)
+}

pkg/tui/bubbles/list/list.go

@@ -0,0 +1,260 @@
+package list
+
+import (
+	"fmt"
+	"strings"
+
+	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
+	tuiutil "git.mlow.ca/mlow/lmcli/pkg/tui/util"
+	"github.com/charmbracelet/bubbles/textinput"
+	"github.com/charmbracelet/bubbles/viewport"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+type Option struct {
+	Label string
+	Value interface{}
+}
+
+type OptionGroup struct {
+	Name    string
+	Options []Option
+}
+
+type Model struct {
+	ID            int
+	HeaderStyle   lipgloss.Style
+	ItemStyle     lipgloss.Style
+	SelectedStyle lipgloss.Style
+	ItemRender    func(Option, bool) string
+
+	Width  int
+	Height int
+
+	optionGroups    []OptionGroup
+	selected        int
+	filterInput     textinput.Model
+	filteredIndices []filteredIndex
+	content         viewport.Model
+	itemYOffsets    []int
+}
+
+type filteredIndex struct {
+	groupIndex  int
+	optionIndex int
+}
+
+type MsgOptionSelected struct {
+	ID     int
+	Option Option
+}
+
+func New(opts []Option) Model {
+	return NewWithGroups([]OptionGroup{{Options: opts}})
+}
+
+func NewWithGroups(groups []OptionGroup) Model {
+	ti := textinput.New()
+	ti.Prompt = "/"
+	ti.PromptStyle = lipgloss.NewStyle().Faint(true)
+
+	m := Model{
+		HeaderStyle:   lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("12")).Padding(1, 0, 1, 1),
+		ItemStyle:     lipgloss.NewStyle(),
+		SelectedStyle: lipgloss.NewStyle().Faint(true).Foreground(lipgloss.Color("6")),
+
+		optionGroups:    groups,
+		selected:        0,
+		filterInput:     ti,
+		filteredIndices: make([]filteredIndex, 0),
+		content:         viewport.New(0, 0),
+		itemYOffsets:    make([]int, 0),
+	}
+
+	m.filterItems()
+	m.content.SetContent(m.renderOptionsList())
+	return m
+}
+
+func (m *Model) Focused() {
+	m.filterInput.Focused()
+}
+
+func (m *Model) Focus() {
+	m.filterInput.Focus()
+}
+
+func (m *Model) Blur() {
+	m.filterInput.Blur()
+}
+
+func (m *Model) filterItems() {
+	filterText := strings.ToLower(m.filterInput.Value())
+
+	var prevSelection *filteredIndex
+	if m.selected <= len(m.filteredIndices)-1 {
+		prevSelection = &m.filteredIndices[m.selected]
+	}
+
+	m.filteredIndices = make([]filteredIndex, 0)
+
+	for groupIndex, group := range m.optionGroups {
+		for optionIndex, option := range group.Options {
+			if filterText == "" ||
+				strings.Contains(strings.ToLower(option.Label), filterText) ||
+				(group.Name != "" && strings.Contains(strings.ToLower(group.Name), filterText)) {
+				m.filteredIndices = append(m.filteredIndices, filteredIndex{groupIndex, optionIndex})
+			}
+		}
+	}
+
+	found := false
+	if len(m.filteredIndices) > 0 && prevSelection != nil {
+		// Preserve previous selection if possible
+		for i, filterIdx := range m.filteredIndices {
+			if prevSelection.groupIndex == filterIdx.groupIndex && prevSelection.optionIndex == filterIdx.optionIndex {
+				m.selected = i
+				found = true
+				break
+			}
+		}
+	}
+	if !found {
+		m.selected = 0
+	}
+}
+
+func (m *Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+	var cmd tea.Cmd
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		if m.filterInput.Focused() {
+			switch msg.String() {
+			case "esc":
+				m.filterInput.Blur()
+				m.filterInput.SetValue("")
+				m.filterItems()
+				m.refreshContent()
+				return *m, shared.KeyHandled(msg)
+			case "enter":
+				m.filterInput.Blur()
+				m.refreshContent()
+				break
+			case "up", "down":
+				break
+			default:
+				m.filterInput, cmd = m.filterInput.Update(msg)
+				m.filterItems()
+				m.refreshContent()
+				return *m, cmd
+			}
+		}
+
+		switch msg.String() {
+		case "up", "k":
+			m.moveSelection(-1)
+			return *m, shared.KeyHandled(msg)
+		case "down", "j":
+			m.moveSelection(1)
+			return *m, shared.KeyHandled(msg)
+		case "enter":
+			return *m, func() tea.Msg {
+				idx := m.filteredIndices[m.selected]
+				return MsgOptionSelected{
+					ID:     m.ID,
+					Option: m.optionGroups[idx.groupIndex].Options[idx.optionIndex],
+				}
+			}
+		case "/":
+			m.filterInput.Focus()
+			return *m, textinput.Blink
+		}
+	}
+
+	m.content, cmd = m.content.Update(msg)
+	return *m, cmd
+}
+
+func (m *Model) refreshContent() {
+	m.content.SetContent(m.renderOptionsList())
+	m.ensureSelectedVisible()
+}
+
+func (m *Model) ensureSelectedVisible() {
+	if m.selected == 0 {
+		m.content.GotoTop()
+	} else if m.selected == len(m.filteredIndices)-1 {
+		m.content.GotoBottom()
+	} else {
+		tuiutil.ScrollIntoView(&m.content, m.itemYOffsets[m.selected], 0)
+	}
+}
+
+func (m *Model) moveSelection(delta int) {
+	prev := m.selected
+	m.selected = min(len(m.filteredIndices)-1, max(0, m.selected+delta))
+	if prev != m.selected {
+		m.refreshContent()
+	}
+}
+
+func (m *Model) View() string {
+	filter := ""
+	if m.filterInput.Focused() {
+		m.filterInput.Width = m.Width
+		filter = m.filterInput.View()
+	}
+
+	contentHeight := m.Height - tuiutil.Height(filter)
+	m.content.Width, m.content.Height = m.Width, contentHeight
+
+	parts := []string{m.content.View()}
+	if filter != "" {
+		parts = append(parts, filter)
+	}
+	return lipgloss.JoinVertical(lipgloss.Left, parts...)
+}
+
+func (m *Model) renderOptionsList() string {
+	yOffset := 0
+	lastGroupIndex := -1
+	m.itemYOffsets = make([]int, len(m.filteredIndices))
+
+	var sb strings.Builder
+	for i, idx := range m.filteredIndices {
+		if idx.groupIndex != lastGroupIndex {
+			group := m.optionGroups[idx.groupIndex].Name
+			if group != "" {
+				headingStr := m.HeaderStyle.Render(group)
+				yOffset += tuiutil.Height(headingStr)
+				sb.WriteString(headingStr)
+				sb.WriteRune('\n')
+			}
+			lastGroupIndex = idx.groupIndex
+		}
+
+		m.itemYOffsets[i] = yOffset
+		option := m.optionGroups[idx.groupIndex].Options[idx.optionIndex]
+		var item string
+		if m.ItemRender != nil {
+			item = m.ItemRender(option, i == m.selected)
+		} else {
+			prefix := "  "
+			if i == m.selected {
+				prefix = "> "
+				item = m.SelectedStyle.Render(option.Label)
+			} else {
+				item = m.ItemStyle.Render(option.Label)
+			}
+			item = fmt.Sprintf("%s%s", prefix, item)
+		}
+		sb.WriteString(item)
+		yOffset += tuiutil.Height(item)
+		if i < len(m.filteredIndices)-1 {
+			sb.WriteRune('\n')
+		}
+	}
+	return sb.String()
+}

pkg/tui/model/model.go

@@ -0,0 +1,281 @@
+package model
+
+import (
+	"context"
+	"fmt"
+
+	"git.mlow.ca/mlow/lmcli/pkg/agents"
+	"git.mlow.ca/mlow/lmcli/pkg/api"
+	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
+	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
+	"github.com/charmbracelet/lipgloss"
+)
+
+type AppModel struct {
+	Ctx           *lmcli.Context
+	Conversations conversation.ConversationList
+	Conversation  conversation.Conversation
+	Messages      []conversation.Message
+	Model         string
+	ProviderName  string
+	Provider      provider.ChatCompletionProvider
+	Agent         *lmcli.Agent
+}
+
+func NewAppModel(ctx *lmcli.Context, initialConversation *conversation.Conversation) *AppModel {
+	app := &AppModel{
+		Ctx:          ctx,
+		Model:        *ctx.Config.Defaults.Model,
+	}
+
+	if initialConversation == nil {
+		app.NewConversation()
+	} else {
+
+	}
+
+	model, provider, _, _ := ctx.GetModelProvider(*ctx.Config.Defaults.Model, "")
+	app.Model = model
+	app.ProviderName = provider
+	app.Agent = ctx.GetAgent(ctx.Config.Defaults.Agent)
+	return app
+}
+
+var (
+	defaultStyle = lipgloss.NewStyle().Faint(true)
+	accentStyle  = defaultStyle.Foreground(lipgloss.Color("6"))
+)
+
+func (a *AppModel) ActiveModel(style lipgloss.Style) string {
+	defaultStyle := style.Inherit(defaultStyle)
+	accentStyle := style.Inherit(accentStyle)
+	return defaultStyle.Render(a.Model) + accentStyle.Render("@") + defaultStyle.Render(a.ProviderName)
+}
+
+type MessageCycleDirection int
+
+const (
+	CycleNext MessageCycleDirection = 1
+	CyclePrev MessageCycleDirection = -1
+)
+
+func (m *AppModel) ClearConversation() {
+	m.Conversation = conversation.Conversation{}
+	m.Messages = []conversation.Message{}
+}
+
+func (m *AppModel) ApplySystemPrompt() {
+	var system string
+	agent := m.Ctx.GetAgent(m.Ctx.Config.Defaults.Agent)
+	if agent != nil && agent.SystemPrompt != "" {
+		system = agent.SystemPrompt
+	}
+	if system == "" {
+		system = m.Ctx.DefaultSystemPrompt()
+	}
+	if system != "" {
+		m.Messages = conversation.ApplySystemPrompt(m.Messages, system, false)
+	}
+}
+
+func (m *AppModel) NewConversation() {
+	m.ClearConversation()
+	m.ApplySystemPrompt()
+}
+
+func (a *AppModel) LoadConversationMessages() ([]conversation.Message, error) {
+	messages, err := a.Ctx.Conversations.PathToLeaf(a.Conversation.SelectedRoot)
+	if err != nil {
+		return nil, fmt.Errorf("Could not load conversation messages: %v %v", a.Conversation.SelectedRoot, err)
+	}
+	return messages, nil
+}
+
+func (a *AppModel) GenerateConversationTitle(messages []conversation.Message) (string, error) {
+	return cmdutil.GenerateTitle(a.Ctx, messages)
+}
+
+func (a *AppModel) CloneMessage(message conversation.Message, selected bool) (*conversation.Message, error) {
+	msg, _, err := a.Ctx.Conversations.CloneBranch(message)
+	if err != nil {
+		return nil, fmt.Errorf("Could not clone message: %v", err)
+	}
+	if selected {
+		if msg.Parent == nil {
+			msg.Conversation.SelectedRoot = msg
+			err = a.Ctx.Conversations.UpdateConversation(msg.Conversation)
+		} else {
+			msg.Parent.SelectedReply = msg
+			err = a.Ctx.Conversations.UpdateMessage(msg.Parent)
+		}
+		if err != nil {
+			return nil, fmt.Errorf("Could not update selected message: %v", err)
+		}
+	}
+	return msg, nil
+}
+
+func (a *AppModel) UpdateMessageContent(message *conversation.Message) error {
+	return a.Ctx.Conversations.UpdateMessage(message)
+}
+
+func cycleSelectedMessage(selected *conversation.Message, choices []conversation.Message, dir MessageCycleDirection) (*conversation.Message, error) {
+	currentIndex := -1
+	for i, reply := range choices {
+		if reply.ID == selected.ID {
+			currentIndex = i
+			break
+		}
+	}
+
+	if currentIndex < 0 {
+		return nil, fmt.Errorf("Selected message %d not found in choices, this is a bug", selected.ID)
+	}
+
+	var next int
+	if dir == CyclePrev {
+		next = (currentIndex - 1 + len(choices)) % len(choices)
+	} else {
+		next = (currentIndex + 1) % len(choices)
+	}
+	return &choices[next], nil
+}
+
+func (a *AppModel) CycleSelectedRoot(conv *conversation.Conversation, dir MessageCycleDirection) (*conversation.Message, error) {
+	if len(conv.RootMessages) < 2 {
+		return nil, nil
+	}
+
+	nextRoot, err := cycleSelectedMessage(conv.SelectedRoot, conv.RootMessages, dir)
+	if err != nil {
+		return nil, err
+	}
+
+	conv.SelectedRoot = nextRoot
+	err = a.Ctx.Conversations.UpdateConversation(conv)
+	if err != nil {
+		return nil, fmt.Errorf("Could not update conversation SelectedRoot: %v", err)
+	}
+	return nextRoot, nil
+}
+
+func (a *AppModel) CycleSelectedReply(message *conversation.Message, dir MessageCycleDirection) (*conversation.Message, error) {
+	if len(message.Replies) < 2 {
+		return nil, nil
+	}
+
+	nextReply, err := cycleSelectedMessage(message.SelectedReply, message.Replies, dir)
+	if err != nil {
+		return nil, err
+	}
+
+	message.SelectedReply = nextReply
+	err = a.Ctx.Conversations.UpdateMessage(message)
+	if err != nil {
+		return nil, fmt.Errorf("Could not update message SelectedReply: %v", err)
+	}
+	return nextReply, nil
+}
+
+func (a *AppModel) PersistMessages() ([]conversation.Message, error) {
+	messages := make([]conversation.Message, len(a.Messages))
+	for i, m := range a.Messages {
+		if i == 0 && m.ID == 0 {
+			m.Conversation = &a.Conversation
+			m, err := a.Ctx.Conversations.SaveMessage(m)
+			if err != nil {
+				return nil, fmt.Errorf("Could not create first message %d: %v", a.Messages[i].ID, err)
+			}
+			messages[i] = *m
+			// let's set the conversation root message(s), as this is the first message
+			m.Conversation.RootMessages = []conversation.Message{*m}
+			m.Conversation.SelectedRoot = &m.Conversation.RootMessages[0]
+			a.Ctx.Conversations.UpdateConversation(m.Conversation)
+		} else if m.ID > 0 {
+			// Existing message, update it
+			err := a.Ctx.Conversations.UpdateMessage(&m)
+			if err != nil {
+				return nil, fmt.Errorf("Could not update message %d: %v", a.Messages[i].ID, err)
+			}
+			messages[i] = m
+		} else if i > 0 {
+			// New message, reply to previous
+			replies, err := a.Ctx.Conversations.Reply(&messages[i-1], m)
+			if err != nil {
+				return nil, fmt.Errorf("Could not reply with new message: %v", err)
+			}
+			messages[i] = replies[0]
+		} else {
+			return nil, fmt.Errorf("No messages to reply to (this is a bug)")
+		}
+	}
+	return messages, nil
+}
+
+func (a *AppModel) PersistConversation() (conversation.Conversation, error) {
+	conv := a.Conversation
+	var err error
+	if a.Conversation.ID > 0 {
+		err = a.Ctx.Conversations.UpdateConversation(&conv)
+	} else {
+		c, e := a.Ctx.Conversations.CreateConversation("")
+		err = e
+		if e == nil && c != nil {
+		  conv = *c
+		}
+	}
+	return conv, err
+}
+
+func (a *AppModel) ExecuteToolCalls(toolCalls []api.ToolCall) ([]api.ToolResult, error) {
+	agent := a.Ctx.GetAgent(a.Ctx.Config.Defaults.Agent)
+	if agent == nil {
+		return nil, fmt.Errorf("Attempted to execute tool calls with no agent configured")
+	}
+
+	return agents.ExecuteToolCalls(toolCalls, agent.Toolbox)
+}
+
+func (a *AppModel) Prompt(
+	messages []conversation.Message,
+	chatReplyChunks chan provider.Chunk,
+	stopSignal chan struct{},
+) (*conversation.Message, error) {
+	model, _, p, err := a.Ctx.GetModelProvider(a.Model, a.ProviderName)
+	if err != nil {
+		return nil, err
+	}
+
+	params := provider.RequestParameters{
+		Model:       model,
+		MaxTokens:   *a.Ctx.Config.Defaults.MaxTokens,
+		Temperature: *a.Ctx.Config.Defaults.Temperature,
+	}
+
+	if a.Agent != nil {
+		params.Toolbox = a.Agent.Toolbox
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	go func() {
+		select {
+		case <-stopSignal:
+			cancel()
+		}
+	}()
+
+	msg, err := p.CreateChatCompletionStream(
+		ctx, params, conversation.MessagesToAPI(messages), chatReplyChunks,
+	)
+
+	if msg != nil {
+		msg := conversation.MessageFromAPI(*msg)
+		msg.Metadata.GenerationProvider = &a.ProviderName
+		msg.Metadata.GenerationModel = &a.Model
+		return &msg, err
+	}
+	return nil, err
+}

pkg/tui/shared/shared.go

@@ -1,52 +1,66 @@
 package shared
 
 import (
-	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
 	tea "github.com/charmbracelet/bubbletea"
 )
 
-type Values struct {
+// An analogue to tea.Model with support for checking if the model has been
-	ConvShortname string
+// initialized before
-}
+type ViewModel interface {
+	Init() tea.Cmd
+	Update(tea.Msg) (ViewModel, tea.Cmd)
 
-type Shared struct {
+	// View methods
-	Ctx    *lmcli.Context
+	Header(width int) string
-	Values *Values
+	// Render the view's main content into a container of the given dimensions
-	Width  int
+	Content(width, height int) string
-	Height int
+	Footer(width int) string
-	Err    error
-}
-
-// a convenience struct for holding rendered content for indiviudal UI
-// elements
-type Sections struct {
-	Header  string
-	Content string
-	Error   string
-	Input   string
-	Footer  string
-}
-
-type (
-	// send to change the current state
-	MsgViewChange View
-	// sent to a state when it is entered
-	MsgViewEnter struct{}
-	// sent when an error occurs
-	MsgError error
-)
-
-func WrapError(err error) tea.Cmd {
-	return func() tea.Msg {
-		return MsgError(err)
-	}
 }
 
 type View int
 
 const (
-	StateChat View = iota
+	ViewChat View = iota
-	StateConversations
+	ViewConversations
-	//StateSettings
+	ViewSettings
 	//StateHelp
 )
+
+type (
+	// send to change the current state
+	MsgViewChange View
+	// sent to a state when it is entered, with the view we're leaving
+	MsgViewEnter View
+	// sent when a recoverable error occurs (displayed to user)
+	MsgError struct { Err error }
+	// sent when the view has handled a key input
+	MsgKeyHandled tea.KeyMsg
+)
+
+func ViewEnter(from View) tea.Cmd {
+	return func() tea.Msg {
+		return MsgViewEnter(from)
+	}
+}
+
+func ChangeView(view View) tea.Cmd {
+	return func() tea.Msg {
+		return MsgViewChange(view)
+	}
+}
+
+func KeyHandled(key tea.KeyMsg) tea.Cmd {
+	return func() tea.Msg {
+		return MsgKeyHandled(key)
+	}
+}
+
+func WrapError(err error) tea.Cmd {
+	return func() tea.Msg {
+		return MsgError{ Err: err }
+	}
+}
+
+func AsMsgError(err error) MsgError {
+	return MsgError{ Err: err }
+}

pkg/tui/tui.go

@@ -1,132 +1,163 @@
 package tui
 
-// The terminal UI for lmcli, launched from the `lmcli chat` command
-// TODO:
-// - change model
-// - rename conversation
-// - set system prompt
-
 import (
 	"fmt"
 
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
+	tuiutil "git.mlow.ca/mlow/lmcli/pkg/tui/util"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/views/chat"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/views/conversations"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/views/settings"
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
 )
 
-// Application model
 type Model struct {
-	shared.Shared
+	App *model.AppModel
 
-	state         shared.View
+	// window size
-	chat          chat.Model
+	width  int
-	conversations conversations.Model
+	height int
+
+	// errors to display
+	// TODO: allow dismissing errors
+	errs []error
+
+	activeView shared.View
+	views      map[shared.View]shared.ViewModel
 }
 
-func initialModel(ctx *lmcli.Context, values shared.Values) Model {
+func initialModel(ctx *lmcli.Context, opts LaunchOptions) *Model {
+	app := model.NewAppModel(ctx, opts.InitialConversation)
+
 	m := Model{
-		Shared: shared.Shared{
+		App:        app,
-			Ctx: ctx,
+		activeView: opts.InitialView,
-			Values: &values,
+		views: map[shared.View]shared.ViewModel{
+			shared.ViewChat:          chat.Chat(app),
+			shared.ViewConversations: conversations.Conversations(app),
+			shared.ViewSettings:      settings.Settings(app),
 		},
 	}
 
-	m.state = shared.StateChat
+	return &m
-	m.chat = chat.Chat(m.Shared)
-	m.conversations = conversations.Conversations(m.Shared)
-	return m
 }
 
-func (m Model) Init() tea.Cmd {
+func (m *Model) Init() tea.Cmd {
-	return tea.Batch(
-		m.conversations.Init(),
-		m.chat.Init(),
-		func() tea.Msg {
-			return shared.MsgViewChange(m.state)
-		},
-	)
-}
-
-func (m *Model) handleGlobalInput(msg tea.KeyMsg) (bool, tea.Cmd) {
-	// delegate input to the active child state first, only handling it at the
-	// global level if the child state does not
 	var cmds []tea.Cmd
-	switch m.state {
+	for _, v := range m.views {
-	case shared.StateChat:
+		// Init views
-		handled, cmd := m.chat.HandleInput(msg)
+		cmds = append(cmds, v.Init())
-		cmds = append(cmds, cmd)
-		if handled {
-			m.chat, cmd = m.chat.Update(nil)
-			cmds = append(cmds, cmd)
-			return true, tea.Batch(cmds...)
-		}
-	case shared.StateConversations:
-		handled, cmd := m.conversations.HandleInput(msg)
-		cmds = append(cmds, cmd)
-		if handled {
-			m.conversations, cmd = m.conversations.Update(nil)
-			cmds = append(cmds, cmd)
-			return true, tea.Batch(cmds...)
 	}
+	cmds = append(cmds, func() tea.Msg {
+		// Initial view change
+		return shared.MsgViewChange(m.activeView)
+	})
+	return tea.Batch(cmds...)
+}
+
+func (m *Model) handleGlobalInput(msg tea.KeyMsg) tea.Cmd {
+	view, cmd := m.views[m.activeView].Update(msg)
+	m.views[m.activeView] = view
+	if cmd != nil {
+		return cmd
 	}
+
 	switch msg.String() {
 	case "ctrl+c", "ctrl+q":
-		return true, tea.Quit
+		return tea.Quit
 	}
-	return false, nil
+	return nil
 }
 
-func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
-	var cmds []tea.Cmd
-
 	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		m.width, m.height = msg.Width, msg.Height
 	case tea.KeyMsg:
-		handled, cmd := m.handleGlobalInput(msg)
+		cmd := m.handleGlobalInput(msg)
-		if handled {
+		if cmd != nil {
 			return m, cmd
 		}
 	case shared.MsgViewChange:
-		m.state = shared.View(msg)
+		currView := m.activeView
-		switch m.state {
+		m.activeView = shared.View(msg)
-		case shared.StateChat:
+		return m, tea.Batch(tea.WindowSize(), shared.ViewEnter(currView))
-			m.chat.HandleResize(m.Width, m.Height)
+	case shared.MsgError:
-		case shared.StateConversations:
+		m.errs = append(m.errs, msg.Err)
-			m.conversations.HandleResize(m.Width, m.Height)
-		}
-		return m, func() tea.Msg { return shared.MsgViewEnter(struct{}{}) }
-	case tea.WindowSizeMsg:
-		m.Width, m.Height = msg.Width, msg.Height
 	}
 
-	var cmd tea.Cmd
+	view, cmd := m.views[m.activeView].Update(msg)
-	switch m.state {
+	m.views[m.activeView] = view
-	case shared.StateConversations:
+	return m, cmd
-		m.conversations, cmd = m.conversations.Update(msg)
-	case shared.StateChat:
-		m.chat, cmd = m.chat.Update(msg)
-	}
-	if cmd != nil {
-		cmds = append(cmds, cmd)
-	}
-
-	return m, tea.Batch(cmds...)
 }
 
-func (m Model) View() string {
+func (m *Model) View() string {
-	switch m.state {
+	if m.width == 0 || m.height == 0 {
-	case shared.StateConversations:
+		// we're dimensionless!
-		return m.conversations.View()
-	case shared.StateChat:
-		return m.chat.View()
-	}
 		return ""
+	}
+
+	header := m.views[m.activeView].Header(m.width)
+	footer := m.views[m.activeView].Footer(m.width)
+	fixedUIHeight := tuiutil.Height(header) + tuiutil.Height(footer)
+
+	errBanners := make([]string, len(m.errs))
+	for idx, err := range m.errs {
+		errBanners[idx] = tuiutil.ErrorBanner(err, m.width)
+		fixedUIHeight += tuiutil.Height(errBanners[idx])
+	}
+
+	content := m.views[m.activeView].Content(m.width, m.height-fixedUIHeight)
+
+	sections := make([]string, 0, 4)
+	if header != "" {
+		sections = append(sections, header)
+	}
+	if content != "" {
+		sections = append(sections, content)
+	}
+	if footer != "" {
+		sections = append(sections, footer)
+	}
+	for _, errBanner := range errBanners {
+		sections = append(sections, errBanner)
+	}
+	return lipgloss.JoinVertical(lipgloss.Left, sections...)
 }
 
-func Launch(ctx *lmcli.Context, convShortname string) error {
+type LaunchOptions struct {
-	p := tea.NewProgram(initialModel(ctx, shared.Values{ConvShortname: convShortname}), tea.WithAltScreen())
+	InitialConversation *conversation.Conversation
-	if _, err := p.Run(); err != nil {
+	InitialView         shared.View
+}
+
+type LaunchOption func(*LaunchOptions)
+
+func WithInitialConversation(conv *conversation.Conversation) LaunchOption {
+	return func(opts *LaunchOptions) {
+		opts.InitialConversation = conv
+	}
+}
+
+func WithInitialView(view shared.View) LaunchOption {
+	return func(opts *LaunchOptions) {
+		opts.InitialView = view
+	}
+}
+
+func Launch(ctx *lmcli.Context, options ...LaunchOption) error {
+	opts := &LaunchOptions{
+		InitialView: shared.ViewChat,
+	}
+	for _, opt := range options {
+		opt(opts)
+	}
+
+	program := tea.NewProgram(initialModel(ctx, *opts), tea.WithAltScreen())
+	if _, err := program.Run(); err != nil {
 		return fmt.Errorf("Error running program: %v", err)
 	}
 	return nil

pkg/tui/util/util.go

@@ -54,22 +54,59 @@ func Height(str string) int {
 	return strings.Count(str, "\n") + 1
 }
 
-// truncate a string until its rendered cell width + the provided tail fits
+func Width(str string) int {
-// within the given width
+	if str == "" {
-func TruncateToCellWidth(str string, width int, tail string) string {
+		return 0
+	}
+	return ansi.PrintableRuneWidth(str)
+}
+
+func TruncateRightToCellWidth(str string, width int, tail string) string {
     cellWidth := ansi.PrintableRuneWidth(str)
     if cellWidth <= width {
         return str
     }
+
     tailWidth := ansi.PrintableRuneWidth(tail)
-	for {
+    if width <= tailWidth {
-		str = str[:len(str)-((cellWidth+tailWidth)-width)]
+        return tail[:width]
-		cellWidth = ansi.PrintableRuneWidth(str)
-		if cellWidth+tailWidth <= max(width, 0) {
-			break
-		}
     }
+
+    targetWidth := width - tailWidth
+    runes := []rune(str)
+
+    for i := len(runes) - 1; i >= 0; i-- {
+        str = string(runes[:i])
+        if ansi.PrintableRuneWidth(str) <= targetWidth {
             return str + tail
+        }
+    }
+
+    return tail
+}
+
+func TruncateLeftToCellWidth(str string, width int, tail string) string {
+    cellWidth := ansi.PrintableRuneWidth(str)
+    if cellWidth <= width {
+        return str
+    }
+
+    tailWidth := ansi.PrintableRuneWidth(tail)
+    if width <= tailWidth {
+        return tail[:width]
+    }
+
+    targetWidth := width - tailWidth
+    runes := []rune(str)
+
+    for i := 0; i < len(runes); i++ {
+        str = string(runes[i:])
+        if ansi.PrintableRuneWidth(str) <= targetWidth {
+            return tail + str
+        }
+    }
+
+    return tail
 }
 
 func ScrollIntoView(vp *viewport.Model, offset int, edge int) {
@@ -98,4 +135,3 @@ func ErrorBanner(err error, width int) string {
 		Foreground(lipgloss.Color("1")).
 		Render(fmt.Sprintf("%s", err))
 }
-

pkg/tui/views/chat/chat.go

@@ -4,7 +4,9 @@ import (
 	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
-	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
+	"git.mlow.ca/mlow/lmcli/pkg/provider"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
 	"github.com/charmbracelet/bubbles/cursor"
 	"github.com/charmbracelet/bubbles/spinner"
 	"github.com/charmbracelet/bubbles/textarea"
@@ -15,39 +17,35 @@ import (
 
 // custom tea.Msg types
 type (
-	// sent when a conversation is (re)loaded
-	msgConversationLoaded struct {
-		conversation *api.Conversation
-		rootMessages []api.Message
-	}
 	// sent when a new conversation title generated
 	msgConversationTitleGenerated string
 	// sent when the conversation has been persisted, triggers a reload of contents
-	msgConversationPersisted struct {
+	msgConversationPersisted conversation.Conversation
-		isNew        bool
+	msgMessagesPersisted []conversation.Message
-		conversation *api.Conversation
-		messages     []api.Message
-	}
 	// sent when a conversation's messages are laoded
-	msgMessagesLoaded []api.Message
+	msgConversationMessagesLoaded struct {
+		messages     []conversation.Message
+	}
 	// a special case of common.MsgError that stops the response waiting animation
-	msgChatResponseError error
+	msgChatResponseError struct {
+		Err error
+	}
 	// sent on each chunk received from LLM
-	msgChatResponseChunk api.Chunk
+	msgChatResponseChunk provider.Chunk
 	// sent on each completed reply
-	msgChatResponse *api.Message
+	msgChatResponse conversation.Message
 	// sent when the response is canceled
 	msgChatResponseCanceled struct{}
 	// sent when results from a tool call are returned
 	msgToolResults []api.ToolResult
 	// sent when the given message is made the new selected reply of its parent
-	msgSelectedReplyCycled *api.Message
+	msgSelectedReplyCycled *conversation.Message
 	// sent when the given message is made the new selected root of the current conversation
-	msgSelectedRootCycled *api.Message
+	msgSelectedRootCycled *conversation.Message
 	// sent when a message's contents are updated and saved
-	msgMessageUpdated *api.Message
+	msgMessageUpdated *conversation.Message
 	// sent when a message is cloned, with the cloned message
-	msgMessageCloned *api.Message
+	msgMessageCloned *conversation.Message
 )
 
 type focusState int
@@ -73,25 +71,24 @@ const (
 )
 
 type Model struct {
-	shared.Shared
+	// App state
-	shared.Sections
+	App    *model.AppModel
+	Height int
+	Width  int
 
-	// app state
+	// Chat view state
 	state           state // current overall status of the view
-	conversation    *api.Conversation
-	rootMessages    []api.Message
-	messages        []api.Message
 	selectedMessage int
 	editorTarget    editorTarget
 	stopSignal      chan struct{}
-	replyChan       chan api.Message
+	replyChan       chan conversation.Message
-	chatReplyChunks chan api.Chunk
+	chatReplyChunks chan provider.Chunk
 	persistence     bool // whether we will save new messages in the conversation
 
-	// ui state
+	// UI state
 	focus          focusState
+	showDetails    bool     // whether various details are shown in the UI (e.g. system prompt, tool calls/results, message metadata)
 	wrap           bool     // whether message content is wrapped to viewport width
-	showToolResults bool     // whether tool calls and results are shown
 	messageCache   []string // cache of syntax highlighted and wrapped message content
 	messageOffsets []int
 
@@ -107,53 +104,51 @@ type Model struct {
 	elapsed    time.Duration
 }
 
-func Chat(shared shared.Shared) Model {
+func getSpinner() spinner.Model {
+	return spinner.New(spinner.WithSpinner(
+		spinner.Spinner{
+			Frames: []string{
+				"∙∙∙",
+				"●∙∙",
+				"●●∙",
+				"●●●",
+				"∙●●",
+				"∙∙●",
+				"∙∙∙",
+				"∙∙●",
+				"∙●●",
+				"●●●",
+				"●●∙",
+				"●∙∙",
+			},
+			FPS: 440 * time.Millisecond,
+		},
+	))
+}
+
+func Chat(app *model.AppModel) *Model {
 	m := Model{
-		Shared: shared,
+		App: app,
 
 		state:       idle,
-		conversation: &api.Conversation{},
 		persistence: true,
 
 		stopSignal:      make(chan struct{}),
-		replyChan:       make(chan api.Message),
+		replyChan:       make(chan conversation.Message),
-		chatReplyChunks: make(chan api.Chunk),
+		chatReplyChunks: make(chan provider.Chunk),
 
 		wrap:            true,
 		selectedMessage: -1,
 
 		content:     viewport.New(0, 0),
 		input:       textarea.New(),
-		spinner: spinner.New(spinner.WithSpinner(
+		spinner:     getSpinner(),
-			spinner.Spinner{
-				Frames: []string{
-					".  ",
-					".. ",
-					"...",
-					".. ",
-					".  ",
-					"   ",
-				},
-				FPS: time.Second / 3,
-			},
-		)),
 		replyCursor: cursor.New(),
 	}
 
 	m.replyCursor.SetChar(" ")
 	m.replyCursor.Focus()
 
-	system := shared.Ctx.DefaultSystemPrompt()
-
-	agent := shared.Ctx.GetAgent(shared.Ctx.Config.Defaults.Agent)
-	if agent != nil && agent.SystemPrompt != "" {
-		system = agent.SystemPrompt
-	}
-
-	if system != "" {
-		m.messages = api.ApplySystemPrompt(m.messages, system, false)
-	}
-
 	m.input.Focus()
 	m.input.MaxHeight = 0
 	m.input.CharLimit = 0
@@ -163,11 +158,10 @@ func Chat(shared shared.Shared) Model {
 	m.input.FocusedStyle.CursorLine = lipgloss.NewStyle()
 	m.input.FocusedStyle.Base = inputFocusedStyle
 	m.input.BlurredStyle.Base = inputBlurredStyle
-
+	return &m
-	return m
 }
 
-func (m Model) Init() tea.Cmd {
+func (m *Model) Init() tea.Cmd {
 	return tea.Batch(
 		m.waitForResponseChunk(),
 	)

pkg/tui/views/chat/cmds.go

@@ -0,0 +1,136 @@
+package chat
+
+import (
+	"time"
+
+	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+func (m *Model) waitForResponseChunk() tea.Cmd {
+	return func() tea.Msg {
+		return msgChatResponseChunk(<-m.chatReplyChunks)
+	}
+}
+
+func (m *Model) loadConversationMessages() tea.Cmd {
+	return func() tea.Msg {
+		messages, err := m.App.LoadConversationMessages()
+		if err != nil {
+			return shared.AsMsgError(err)
+		}
+		return msgConversationMessagesLoaded{messages}
+	}
+}
+
+func (m *Model) generateConversationTitle() tea.Cmd {
+	return func() tea.Msg {
+		title, err := m.App.GenerateConversationTitle(m.App.Messages)
+		if err != nil {
+			return shared.AsMsgError(err)
+		}
+		return msgConversationTitleGenerated(title)
+	}
+}
+
+func (m *Model) cloneMessage(message conversation.Message, selected bool) tea.Cmd {
+	return func() tea.Msg {
+		msg, err := m.App.CloneMessage(message, selected)
+		if err != nil {
+			return shared.WrapError(err)
+		}
+		return msgMessageCloned(msg)
+	}
+}
+
+func (m *Model) updateMessageContent(message *conversation.Message) tea.Cmd {
+	return func() tea.Msg {
+		err := m.App.UpdateMessageContent(message)
+		if err != nil {
+			return shared.WrapError(err)
+		}
+		return msgMessageUpdated(message)
+	}
+}
+
+func (m *Model) cycleSelectedRoot(conv *conversation.Conversation, dir model.MessageCycleDirection) tea.Cmd {
+	if len(conv.RootMessages) < 2 {
+		return nil
+	}
+
+	return func() tea.Msg {
+		nextRoot, err := m.App.CycleSelectedRoot(conv, dir)
+		if err != nil {
+			return shared.WrapError(err)
+		}
+		return msgSelectedRootCycled(nextRoot)
+	}
+}
+
+func (m *Model) cycleSelectedReply(message *conversation.Message, dir model.MessageCycleDirection) tea.Cmd {
+	if len(message.Replies) < 2 {
+		return nil
+	}
+
+	return func() tea.Msg {
+		nextReply, err := m.App.CycleSelectedReply(message, dir)
+		if err != nil {
+			return shared.WrapError(err)
+		}
+		return msgSelectedReplyCycled(nextReply)
+	}
+}
+
+func (m *Model) persistConversation() tea.Cmd {
+	return func() tea.Msg {
+		conversation, err := m.App.PersistConversation()
+		if err != nil {
+			return shared.AsMsgError(err)
+		}
+		return msgConversationPersisted(conversation)
+	}
+}
+
+func (m *Model) persistMessages() tea.Cmd {
+	return func() tea.Msg {
+		messages, err := m.App.PersistMessages()
+		if err != nil {
+			return shared.AsMsgError(err)
+		}
+		return msgMessagesPersisted(messages)
+	}
+}
+
+func (m *Model) executeToolCalls(toolCalls []api.ToolCall) tea.Cmd {
+	return func() tea.Msg {
+		results, err := m.App.ExecuteToolCalls(toolCalls)
+		if err != nil {
+			return shared.AsMsgError(err)
+		}
+		return msgToolResults(results)
+	}
+}
+
+func (m *Model) promptLLM() tea.Cmd {
+	m.state = pendingResponse
+	m.spinner = getSpinner()
+	m.replyCursor.Blink = false
+
+	m.startTime = time.Now()
+	m.elapsed = 0
+	m.tokenCount = 0
+
+	return tea.Batch(
+		m.spinner.Tick,
+		func() tea.Msg {
+			resp, err := m.App.Prompt(m.App.Messages, m.chatReplyChunks, m.stopSignal)
+			if err != nil {
+				return msgChatResponseError{Err: err}
+			}
+			return msgChatResponse(*resp)
+		},
+	)
+}

pkg/tui/views/chat/conversation.go

@@ -1,308 +0,0 @@
-package chat
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"time"
-
-	"git.mlow.ca/mlow/lmcli/pkg/agents"
-	"git.mlow.ca/mlow/lmcli/pkg/api"
-	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
-	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
-	tea "github.com/charmbracelet/bubbletea"
-)
-
-func (m *Model) setMessage(i int, msg api.Message) {
-	if i >= len(m.messages) {
-		panic("i out of range")
-	}
-	m.messages[i] = msg
-	m.messageCache[i] = m.renderMessage(i)
-}
-
-func (m *Model) addMessage(msg api.Message) {
-	m.messages = append(m.messages, msg)
-	m.messageCache = append(m.messageCache, m.renderMessage(len(m.messages)-1))
-}
-
-func (m *Model) setMessageContents(i int, content string) {
-	if i >= len(m.messages) {
-		panic("i out of range")
-	}
-	m.messages[i].Content = content
-	m.messageCache[i] = m.renderMessage(i)
-}
-
-func (m *Model) rebuildMessageCache() {
-	m.messageCache = make([]string, len(m.messages))
-	for i := range m.messages {
-		m.messageCache[i] = m.renderMessage(i)
-	}
-}
-
-func (m *Model) updateContent() {
-	atBottom := m.content.AtBottom()
-	m.content.SetContent(m.conversationMessagesView())
-	if atBottom {
-		// if we were at bottom before the update, scroll with the output
-		m.content.GotoBottom()
-	}
-}
-
-func (m *Model) loadConversation(shortname string) tea.Cmd {
-	return func() tea.Msg {
-		if shortname == "" {
-			return nil
-		}
-		c, err := m.Shared.Ctx.Store.ConversationByShortName(shortname)
-		if err != nil {
-			return shared.MsgError(fmt.Errorf("Could not lookup conversation: %v", err))
-		}
-		if c.ID == 0 {
-			return shared.MsgError(fmt.Errorf("Conversation not found: %s", shortname))
-		}
-		rootMessages, err := m.Shared.Ctx.Store.RootMessages(c.ID)
-		if err != nil {
-			return shared.MsgError(fmt.Errorf("Could not load conversation root messages: %v\n", err))
-		}
-		return msgConversationLoaded{c, rootMessages}
-	}
-}
-
-func (m *Model) loadConversationMessages() tea.Cmd {
-	return func() tea.Msg {
-		messages, err := m.Shared.Ctx.Store.PathToLeaf(m.conversation.SelectedRoot)
-		if err != nil {
-			return shared.MsgError(fmt.Errorf("Could not load conversation messages: %v\n", err))
-		}
-		return msgMessagesLoaded(messages)
-	}
-}
-
-func (m *Model) generateConversationTitle() tea.Cmd {
-	return func() tea.Msg {
-		title, err := cmdutil.GenerateTitle(m.Shared.Ctx, m.messages)
-		if err != nil {
-			return shared.MsgError(err)
-		}
-		return msgConversationTitleGenerated(title)
-	}
-}
-
-func (m *Model) updateConversationTitle(conversation *api.Conversation) tea.Cmd {
-	return func() tea.Msg {
-		err := m.Shared.Ctx.Store.UpdateConversation(conversation)
-		if err != nil {
-			return shared.WrapError(err)
-		}
-		return nil
-	}
-}
-
-// Clones the given message (and its descendents). If selected is true, updates
-// either its parent's SelectedReply or its conversation's SelectedRoot to
-// point to the new clone
-func (m *Model) cloneMessage(message api.Message, selected bool) tea.Cmd {
-	return func() tea.Msg {
-		msg, _, err := m.Ctx.Store.CloneBranch(message)
-		if err != nil {
-			return shared.WrapError(fmt.Errorf("Could not clone message: %v", err))
-		}
-		if selected {
-			if msg.Parent == nil {
-				msg.Conversation.SelectedRoot = msg
-				err = m.Shared.Ctx.Store.UpdateConversation(msg.Conversation)
-			} else {
-				msg.Parent.SelectedReply = msg
-				err = m.Shared.Ctx.Store.UpdateMessage(msg.Parent)
-			}
-			if err != nil {
-				return shared.WrapError(fmt.Errorf("Could not update selected message: %v", err))
-			}
-		}
-		return msgMessageCloned(msg)
-	}
-}
-
-func (m *Model) updateMessageContent(message *api.Message) tea.Cmd {
-	return func() tea.Msg {
-		err := m.Shared.Ctx.Store.UpdateMessage(message)
-		if err != nil {
-			return shared.WrapError(fmt.Errorf("Could not update message: %v", err))
-		}
-		return msgMessageUpdated(message)
-	}
-}
-
-func cycleSelectedMessage(selected *api.Message, choices []api.Message, dir MessageCycleDirection) (*api.Message, error) {
-	currentIndex := -1
-	for i, reply := range choices {
-		if reply.ID == selected.ID {
-			currentIndex = i
-			break
-		}
-	}
-
-	if currentIndex < 0 {
-		// this should probably be an assert
-		return nil, fmt.Errorf("Selected message %d not found in choices, this is a bug", selected.ID)
-	}
-
-	var next int
-	if dir == CyclePrev {
-		// Wrap around to the last reply if at the beginning
-		next = (currentIndex - 1 + len(choices)) % len(choices)
-	} else {
-		// Wrap around to the first reply if at the end
-		next = (currentIndex + 1) % len(choices)
-	}
-	return &choices[next], nil
-}
-
-func (m *Model) cycleSelectedRoot(conv *api.Conversation, dir MessageCycleDirection) tea.Cmd {
-	if len(m.rootMessages) < 2 {
-		return nil
-	}
-
-	return func() tea.Msg {
-		nextRoot, err := cycleSelectedMessage(conv.SelectedRoot, m.rootMessages, dir)
-		if err != nil {
-			return shared.WrapError(err)
-		}
-
-		conv.SelectedRoot = nextRoot
-		err = m.Shared.Ctx.Store.UpdateConversation(conv)
-		if err != nil {
-			return shared.WrapError(fmt.Errorf("Could not update conversation SelectedRoot: %v", err))
-		}
-		return msgSelectedRootCycled(nextRoot)
-	}
-}
-
-func (m *Model) cycleSelectedReply(message *api.Message, dir MessageCycleDirection) tea.Cmd {
-	if len(message.Replies) < 2 {
-		return nil
-	}
-
-	return func() tea.Msg {
-		nextReply, err := cycleSelectedMessage(message.SelectedReply, message.Replies, dir)
-		if err != nil {
-			return shared.WrapError(err)
-		}
-
-		message.SelectedReply = nextReply
-		err = m.Shared.Ctx.Store.UpdateMessage(message)
-		if err != nil {
-			return shared.WrapError(fmt.Errorf("Could not update message SelectedReply: %v", err))
-		}
-		return msgSelectedReplyCycled(nextReply)
-	}
-}
-
-func (m *Model) persistConversation() tea.Cmd {
-	conversation := m.conversation
-	messages := m.messages
-
-	var err error
-	if conversation.ID == 0 {
-		return func() tea.Msg {
-			// Start a new conversation with all messages so far
-			conversation, messages, err = m.Shared.Ctx.Store.StartConversation(messages...)
-			if err != nil {
-				return shared.MsgError(fmt.Errorf("Could not start new conversation: %v", err))
-			}
-			return msgConversationPersisted{true, conversation, messages}
-		}
-	}
-
-	return func() tea.Msg {
-		// else, we'll handle updating an existing conversation's messages
-		for i := range messages {
-			if messages[i].ID > 0 {
-				// message has an ID, update it
-				err := m.Shared.Ctx.Store.UpdateMessage(&messages[i])
-				if err != nil {
-					return shared.MsgError(err)
-				}
-			} else if i > 0 {
-				// messages is new, so add it as a reply to previous message
-				saved, err := m.Shared.Ctx.Store.Reply(&messages[i-1], messages[i])
-				if err != nil {
-					return shared.MsgError(err)
-				}
-				messages[i] = saved[0]
-			} else {
-				// message has no id and no previous messages to add it to
-				// this shouldn't happen?
-				return fmt.Errorf("Error: no messages to reply to")
-			}
-		}
-		return msgConversationPersisted{false, conversation, messages}
-	}
-}
-
-func (m *Model) executeToolCalls(toolCalls []api.ToolCall) tea.Cmd {
-	return func() tea.Msg {
-		agent := m.Shared.Ctx.GetAgent(m.Shared.Ctx.Config.Defaults.Agent)
-		if agent == nil {
-			return shared.MsgError(fmt.Errorf("Attempted to execute tool calls with no agent configured"))
-		}
-
-		results, err := agents.ExecuteToolCalls(toolCalls, agent.Toolbox)
-		if err != nil {
-			return shared.MsgError(err)
-		}
-		return msgToolResults(results)
-	}
-}
-
-func (m *Model) promptLLM() tea.Cmd {
-	m.state = pendingResponse
-	m.replyCursor.Blink = false
-
-	m.startTime = time.Now()
-	m.elapsed = 0
-	m.tokenCount = 0
-
-	return func() tea.Msg {
-		model, provider, err := m.Shared.Ctx.GetModelProvider(*m.Shared.Ctx.Config.Defaults.Model)
-		if err != nil {
-			return shared.MsgError(err)
-		}
-
-		params := api.RequestParameters{
-			Model:       model,
-			MaxTokens:   *m.Shared.Ctx.Config.Defaults.MaxTokens,
-			Temperature: *m.Shared.Ctx.Config.Defaults.Temperature,
-		}
-
-		agent := m.Shared.Ctx.GetAgent(m.Shared.Ctx.Config.Defaults.Agent)
-		if agent != nil {
-			params.Toolbox = agent.Toolbox
-		}
-
-		ctx, cancel := context.WithCancel(context.Background())
-
-		go func() {
-			select {
-			case <-m.stopSignal:
-				cancel()
-			}
-		}()
-
-		resp, err := provider.CreateChatCompletionStream(
-			ctx, params, m.messages, m.chatReplyChunks,
-		)
-
-		if errors.Is(err, context.Canceled) {
-			return msgChatResponseCanceled(struct{}{})
-		}
-
-		if err != nil {
-			return msgChatResponseError(err)
-		}
-
-		return msgChatResponse(resp)
-	}
-}

pkg/tui/views/chat/input.go

@@ -5,29 +5,24 @@ import (
 	"strings"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
 	tuiutil "git.mlow.ca/mlow/lmcli/pkg/tui/util"
 	tea "github.com/charmbracelet/bubbletea"
 )
 
-type MessageCycleDirection int
+func (m *Model) handleInput(msg tea.KeyMsg) tea.Cmd {
-
-const (
-	CycleNext MessageCycleDirection = 1
-	CyclePrev MessageCycleDirection = -1
-)
-
-func (m *Model) HandleInput(msg tea.KeyMsg) (bool, tea.Cmd) {
 	switch m.focus {
 	case focusInput:
-		consumed, cmd := m.handleInputKey(msg)
+		cmd := m.handleInputKey(msg)
-		if consumed {
+		if cmd != nil {
-			return true, cmd
+			return cmd
 		}
 	case focusMessages:
-		consumed, cmd := m.handleMessagesKey(msg)
+		cmd := m.handleMessagesKey(msg)
-		if consumed {
+		if cmd != nil {
-			return true, cmd
+			return cmd
 		}
 	}
 
@@ -35,126 +30,152 @@ func (m *Model) HandleInput(msg tea.KeyMsg) (bool, tea.Cmd) {
 	case "esc":
 		if m.state == pendingResponse {
 			m.stopSignal <- struct{}{}
-			return true, nil
+			return shared.KeyHandled(msg)
 		}
-		return true, func() tea.Msg {
+		return func() tea.Msg {
-			return shared.MsgViewChange(shared.StateConversations)
+			return shared.MsgViewChange(shared.ViewConversations)
 		}
 	case "ctrl+c":
 		if m.state == pendingResponse {
 			m.stopSignal <- struct{}{}
-			return true, nil
+			return shared.KeyHandled(msg)
+		}
+	case "ctrl+g":
+		if m.state == pendingResponse {
+			m.stopSignal <- struct{}{}
+			return shared.KeyHandled(msg)
+		}
+		return func() tea.Msg {
+			return shared.MsgViewChange(shared.ViewSettings)
 		}
 	case "ctrl+p":
 		m.persistence = !m.persistence
-		return true, nil
+		return shared.KeyHandled(msg)
 	case "ctrl+t":
-		m.showToolResults = !m.showToolResults
+		m.showDetails = !m.showDetails
 		m.rebuildMessageCache()
 		m.updateContent()
-		return true, nil
+		return shared.KeyHandled(msg)
 	case "ctrl+w":
 		m.wrap = !m.wrap
 		m.rebuildMessageCache()
 		m.updateContent()
-		return true, nil
+		return shared.KeyHandled(msg)
+	case "ctrl+n":
+		m.App.NewConversation()
+		m.rebuildMessageCache()
+		m.updateContent()
+		return shared.KeyHandled(msg)
 	}
-	return false, nil
+	return nil
+}
+
+func (m *Model) scrollSelection(dir int) {
+	if m.selectedMessage+dir < 0 || m.selectedMessage+dir >= len(m.App.Messages) {
+		return
+	}
+
+	newIdx := m.selectedMessage
+	for i := newIdx + dir; i >= 0 && i < len(m.App.Messages); i += dir {
+		if !m.showDetails && m.App.Messages[i].Role.IsSystem() {
+			continue
+		}
+		newIdx = i
+		break
+	}
+	if newIdx != m.selectedMessage {
+		m.selectedMessage = newIdx
+		m.updateContent()
+	}
+	yOffset := m.messageOffsets[m.selectedMessage]
+	tuiutil.ScrollIntoView(&m.content, yOffset, m.content.Height/2)
 }
 
 // handleMessagesKey handles input when the messages pane is focused
-func (m *Model) handleMessagesKey(msg tea.KeyMsg) (bool, tea.Cmd) {
+func (m *Model) handleMessagesKey(msg tea.KeyMsg) tea.Cmd {
 	switch msg.String() {
 	case "tab", "enter":
 		m.focus = focusInput
 		m.updateContent()
 		m.input.Focus()
-		return true, nil
+		return shared.KeyHandled(msg)
 	case "e":
-		if m.selectedMessage < len(m.messages) {
+		if m.selectedMessage < len(m.App.Messages) {
 			m.editorTarget = selectedMessage
-			return true, tuiutil.OpenTempfileEditor(
+			return tuiutil.OpenTempfileEditor(
 				"message.*.md",
-				m.messages[m.selectedMessage].Content,
+				m.App.Messages[m.selectedMessage].Content,
 				"# Edit the message below\n",
 			)
 		}
-		return false, nil
+		return nil
-	case "ctrl+k":
+	case "ctrl+k", "ctrl+up":
-		if m.selectedMessage > 0 && len(m.messages) == len(m.messageOffsets) {
+		if m.selectedMessage > 0 {
-			m.selectedMessage--
+			m.scrollSelection(-1)
-			m.updateContent()
-			offset := m.messageOffsets[m.selectedMessage]
-			tuiutil.ScrollIntoView(&m.content, offset, m.content.Height/2)
 		}
-		return true, nil
+		return shared.KeyHandled(msg)
-	case "ctrl+j":
+	case "ctrl+j", "ctrl+down":
-		if m.selectedMessage < len(m.messages)-1 && len(m.messages) == len(m.messageOffsets) {
+		if m.selectedMessage < len(m.App.Messages)-1 {
-			m.selectedMessage++
+			m.scrollSelection(1)
-			m.updateContent()
-			offset := m.messageOffsets[m.selectedMessage]
-			tuiutil.ScrollIntoView(&m.content, offset, m.content.Height/2)
 		}
-		return true, nil
+		return shared.KeyHandled(msg)
-	case "ctrl+h", "ctrl+l":
+	case "ctrl+h", "ctrl+left", "ctrl+l", "ctrl+right":
-		dir := CyclePrev
+		dir := model.CyclePrev
-		if msg.String() == "ctrl+l" {
+		if msg.String() == "ctrl+l" || msg.String() == "ctrl+right" {
-			dir = CycleNext
+			dir = model.CycleNext
 		}
 
 		var cmd tea.Cmd
 		if m.selectedMessage == 0 {
-			cmd = m.cycleSelectedRoot(m.conversation, dir)
+			cmd = m.cycleSelectedRoot(&m.App.Conversation, dir)
 		} else if m.selectedMessage > 0 {
-			cmd = m.cycleSelectedReply(&m.messages[m.selectedMessage-1], dir)
+			cmd = m.cycleSelectedReply(&m.App.Messages[m.selectedMessage-1], dir)
 		}
-
+		return cmd
-		return cmd != nil, cmd
 	case "ctrl+r":
-		// resubmit the conversation with all messages up until and including the selected message
+		// prompt the model with all messages up to and including the selected message
-		if m.state == idle && m.selectedMessage < len(m.messages) {
+		if m.state == idle && m.selectedMessage < len(m.App.Messages) {
-			m.messages = m.messages[:m.selectedMessage+1]
+			m.App.Messages = m.App.Messages[:m.selectedMessage+1]
 			m.messageCache = m.messageCache[:m.selectedMessage+1]
 			cmd := m.promptLLM()
 			m.updateContent()
 			m.content.GotoBottom()
-			return true, cmd
+			return cmd
 		}
 	}
-	return false, nil
+	return nil
 }
 
 // handleInputKey handles input when the input textarea is focused
-func (m *Model) handleInputKey(msg tea.KeyMsg) (bool, tea.Cmd) {
+func (m *Model) handleInputKey(msg tea.KeyMsg) tea.Cmd {
 	switch msg.String() {
 	case "esc":
 		m.focus = focusMessages
-		if len(m.messages) > 0 {
+		if len(m.App.Messages) > 0 {
-			if m.selectedMessage < 0 || m.selectedMessage >= len(m.messages) {
+			if m.selectedMessage < 0 || m.selectedMessage >= len(m.App.Messages) {
-				m.selectedMessage = len(m.messages) - 1
+				m.selectedMessage = len(m.App.Messages) - 1
 			}
 			offset := m.messageOffsets[m.selectedMessage]
 			tuiutil.ScrollIntoView(&m.content, offset, m.content.Height/2)
 		}
 		m.updateContent()
 		m.input.Blur()
-		return true, nil
+		return shared.KeyHandled(msg)
 	case "ctrl+s":
-		// TODO: call a "handleSend" function which returns a tea.Cmd
 		if m.state != idle {
-			return false, nil
+			return nil
 		}
 
 		input := strings.TrimSpace(m.input.Value())
 		if input == "" {
-			return true, nil
+			return shared.KeyHandled(msg)
 		}
 
-		if len(m.messages) > 0 && m.messages[len(m.messages)-1].Role == api.MessageRoleUser {
+		if len(m.App.Messages) > 0 && m.App.Messages[len(m.App.Messages)-1].Role.IsUser() {
-			return true, shared.WrapError(fmt.Errorf("Can't reply to a user message"))
+			return shared.WrapError(fmt.Errorf("Can't reply to a user message"))
 		}
 
-		m.addMessage(api.Message{
+		m.addMessage(conversation.Message{
 			Role:    api.MessageRoleUser,
 			Content: input,
 		})
@@ -170,11 +191,11 @@ func (m *Model) handleInputKey(msg tea.KeyMsg) (bool, tea.Cmd) {
 
 		m.updateContent()
 		m.content.GotoBottom()
-		return true, tea.Batch(cmds...)
+		return tea.Batch(cmds...)
 	case "ctrl+e":
 		cmd := tuiutil.OpenTempfileEditor("message.*.md", m.input.Value(), "# Edit your input below\n")
 		m.editorTarget = input
-		return true, cmd
+		return cmd
 	}
-	return false, nil
+	return nil
 }

pkg/tui/views/chat/update.go

@@ -5,57 +5,87 @@ import (
 	"time"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
 	tuiutil "git.mlow.ca/mlow/lmcli/pkg/tui/util"
 	"github.com/charmbracelet/bubbles/cursor"
 	tea "github.com/charmbracelet/bubbletea"
 )
 
-func (m *Model) HandleResize(width, height int) {
+func (m *Model) setMessage(i int, msg conversation.Message) {
-	m.Width, m.Height = width, height
+	if i >= len(m.App.Messages) {
-	m.content.Width = width
+		panic("i out of range")
-	m.input.SetWidth(width - m.input.FocusedStyle.Base.GetHorizontalFrameSize())
+	}
-	if len(m.messages) > 0 {
+	m.App.Messages[i] = msg
+	m.messageCache[i] = m.renderMessage(i)
+}
+
+func (m *Model) addMessage(msg conversation.Message) {
+	m.App.Messages = append(m.App.Messages, msg)
+	m.messageCache = append(m.messageCache, m.renderMessage(len(m.App.Messages)-1))
+}
+
+func (m *Model) setMessageContents(i int, content string) {
+	if i >= len(m.App.Messages) {
+		panic("i out of range")
+	}
+	m.App.Messages[i].Content = content
+	m.messageCache[i] = m.renderMessage(i)
+}
+
+func (m *Model) rebuildMessageCache() {
+	m.messageCache = make([]string, len(m.App.Messages))
+	for i := range m.App.Messages {
+		m.messageCache[i] = m.renderMessage(i)
+	}
+}
+
+func (m *Model) updateContent() {
+	atBottom := m.content.AtBottom()
+	m.content.SetContent(m.conversationMessagesView())
+	if atBottom {
+		m.content.GotoBottom()
+	}
+}
+
+func (m *Model) Update(msg tea.Msg) (shared.ViewModel, tea.Cmd) {
+	inputHandled := false
+
+	var cmds []tea.Cmd
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		cmd := m.handleInput(msg)
+		if cmd != nil {
+			inputHandled = true
+			cmds = append(cmds, cmd)
+		}
+	case tea.WindowSizeMsg:
+		m.Width, m.Height = msg.Width, msg.Height
+		m.content.Width = msg.Width
+		m.input.SetWidth(msg.Width - m.input.FocusedStyle.Base.GetHorizontalFrameSize())
+		if len(m.App.Messages) > 0 {
 			m.rebuildMessageCache()
 			m.updateContent()
 		}
-}
-
-func (m *Model) waitForResponseChunk() tea.Cmd {
-	return func() tea.Msg {
-		return msgChatResponseChunk(<-m.chatReplyChunks)
-	}
-}
-
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
-	var cmds []tea.Cmd
-	switch msg := msg.(type) {
-	case tea.WindowSizeMsg:
-		m.HandleResize(msg.Width, msg.Height)
 	case shared.MsgViewEnter:
 		// wake up spinners and cursors
 		cmds = append(cmds, cursor.Blink, m.spinner.Tick)
 
-		if m.Shared.Values.ConvShortname != "" {
+		// Refresh view
-			// (re)load conversation contents
-			cmds = append(cmds, m.loadConversation(m.Shared.Values.ConvShortname))
-
-			if m.conversation.ShortName.String != m.Shared.Values.ConvShortname {
-				// clear existing messages if we're loading a new conversation
-				m.messages = []api.Message{}
-				m.selectedMessage = 0
-			}
-		}
-
 		m.rebuildMessageCache()
 		m.updateContent()
+
+		if m.App.Conversation.ID > 0 {
+			// (re)load conversation contents
+			cmds = append(cmds, m.loadConversationMessages())
+		}
 	case tuiutil.MsgTempfileEditorClosed:
 		contents := string(msg)
 		switch m.editorTarget {
 		case input:
 			m.input.SetValue(contents)
 		case selectedMessage:
-			toEdit := m.messages[m.selectedMessage]
+			toEdit := m.App.Messages[m.selectedMessage]
 			if toEdit.Content != contents {
 				toEdit.Content = contents
 				m.setMessage(m.selectedMessage, toEdit)
@@ -65,19 +95,12 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 				}
 			}
 		}
-	case msgConversationLoaded:
+	case msgConversationMessagesLoaded:
-		m.conversation = msg.conversation
+		m.App.Messages = msg.messages
-		m.rootMessages = msg.rootMessages
-		m.selectedMessage = -1
-		if len(m.rootMessages) > 0 {
-			cmds = append(cmds, m.loadConversationMessages())
-		}
-	case msgMessagesLoaded:
-		m.messages = msg
 		if m.selectedMessage == -1 {
-			m.selectedMessage = len(msg) - 1
+			m.selectedMessage = len(msg.messages) - 1
 		} else {
-			m.selectedMessage = min(m.selectedMessage, len(m.messages))
+			m.selectedMessage = min(m.selectedMessage, len(m.App.Messages))
 		}
 		m.rebuildMessageCache()
 		m.updateContent()
@@ -88,13 +111,13 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			break
 		}
 
-		last := len(m.messages) - 1
+		last := len(m.App.Messages) - 1
-		if last >= 0 && m.messages[last].Role.IsAssistant() {
+		if last >= 0 && m.App.Messages[last].Role.IsAssistant() {
 			// append chunk to existing message
-			m.setMessageContents(last, m.messages[last].Content+msg.Content)
+			m.setMessageContents(last, m.App.Messages[last].Content+msg.Content)
 		} else {
 			// use chunk in a new message
-			m.addMessage(api.Message{
+			m.addMessage(conversation.Message{
 				Role:    api.MessageRoleAssistant,
 				Content: msg.Content,
 			})
@@ -110,25 +133,24 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 	case msgChatResponse:
 		m.state = idle
 
-		reply := (*api.Message)(msg)
+		reply := conversation.Message(msg)
 		reply.Content = strings.TrimSpace(reply.Content)
 
-		last := len(m.messages) - 1
+		last := len(m.App.Messages) - 1
 		if last < 0 {
 			panic("Unexpected empty messages handling msgAssistantReply")
 		}
 
-		if m.messages[last].Role.IsAssistant() {
+		if m.App.Messages[last].Role.IsAssistant() {
-			// TODO: handle continuations gracefully - some models support them well, others fail horribly.
+			// TODO: handle continuations gracefully - only some models support them
-			m.setMessage(last, *reply)
+			m.setMessage(last, reply)
 		} else {
-			m.addMessage(*reply)
+			m.addMessage(reply)
 		}
 
-		switch reply.Role {
+		if reply.Role == api.MessageRoleToolCall {
-		case api.MessageRoleToolCall:
 			// TODO: user confirmation before execution
-			// m.state = waitingForConfirmation
+			// m.state = confirmToolUse
 			cmds = append(cmds, m.executeToolCalls(reply.ToolCalls))
 		}
 
@@ -136,31 +158,29 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			cmds = append(cmds, m.persistConversation())
 		}
 
-		if m.conversation.Title == "" {
+		if m.App.Conversation.Title == "" && len(m.App.Messages) > 0 {
 			cmds = append(cmds, m.generateConversationTitle())
 		}
-
-		m.updateContent()
 	case msgChatResponseCanceled:
 		m.state = idle
 		m.updateContent()
 	case msgChatResponseError:
 		m.state = idle
-		m.Shared.Err = error(msg)
 		m.updateContent()
+		return m, shared.WrapError(msg.Err)
 	case msgToolResults:
-		last := len(m.messages) - 1
+		last := len(m.App.Messages) - 1
 		if last < 0 {
 			panic("Unexpected empty messages handling msgAssistantReply")
 		}
 
-		if m.messages[last].Role != api.MessageRoleToolCall {
+		if m.App.Messages[last].Role != api.MessageRoleToolCall {
 			panic("Previous message not a tool call, unexpected")
 		}
 
-		m.addMessage(api.Message{
+		m.addMessage(conversation.Message{
 			Role:        api.MessageRoleToolResult,
-			ToolResults: api.ToolResults(msg),
+			ToolResults: conversation.ToolResults(msg),
 		})
 
 		if m.persistence {
@@ -170,30 +190,25 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		m.updateContent()
 	case msgConversationTitleGenerated:
 		title := string(msg)
-		m.conversation.Title = title
+		m.App.Conversation.Title = title
-		if m.persistence {
+		if m.persistence && m.App.Conversation.ID > 0 {
-			cmds = append(cmds, m.updateConversationTitle(m.conversation))
+			cmds = append(cmds, m.persistConversation())
 		}
 	case cursor.BlinkMsg:
 		if m.state == pendingResponse {
 			// ensure we show the updated "wait for response" cursor blink state
-			last := len(m.messages)-1
+			last := len(m.App.Messages) - 1
 			m.messageCache[last] = m.renderMessage(last)
 			m.updateContent()
 		}
 	case msgConversationPersisted:
-		m.conversation = msg.conversation
+		m.App.Conversation = conversation.Conversation(msg)
-		m.messages = msg.messages
+		cmds = append(cmds, m.persistMessages())
-		if msg.isNew {
+	case msgMessagesPersisted:
-			m.rootMessages = []api.Message{m.messages[0]}
+		m.App.Messages = msg
-		}
 		m.rebuildMessageCache()
 		m.updateContent()
 	case msgMessageCloned:
-		if msg.Parent == nil {
-			m.conversation = msg.Conversation
-			m.rootMessages = append(m.rootMessages, *msg)
-		}
 		cmds = append(cmds, m.loadConversationMessages())
 	case msgSelectedRootCycled, msgSelectedReplyCycled, msgMessageUpdated:
 		cmds = append(cmds, m.loadConversationMessages())
@@ -210,38 +225,22 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 	}
 
 	prevInputLineCnt := m.input.LineCount()
-	inputCaptured := false
+
+	if !inputHandled {
 		m.input, cmd = m.input.Update(msg)
 		if cmd != nil {
-		inputCaptured = true
+			inputHandled = true
 			cmds = append(cmds, cmd)
 		}
+	}
 
-	if !inputCaptured {
+	if !inputHandled {
 		m.content, cmd = m.content.Update(msg)
 		if cmd != nil {
 			cmds = append(cmds, cmd)
 		}
 	}
 
-	// update views once window dimensions are known
-	if m.Width > 0 {
-		m.Header = m.headerView()
-		m.Footer = m.footerView()
-		m.Error = tuiutil.ErrorBanner(m.Err, m.Width)
-		fixedHeight := tuiutil.Height(m.Header) + tuiutil.Height(m.Error) + tuiutil.Height(m.Footer)
-
-		// calculate clamped input height to accomodate input text
-		// minimum 4 lines, maximum half of content area
-		newHeight := max(4, min((m.Height-fixedHeight-1)/2, m.input.LineCount()))
-		m.input.SetHeight(newHeight)
-		m.Input = m.input.View()
-
-		// remaining height towards content
-		m.content.Height = m.Height - fixedHeight - tuiutil.Height(m.Input)
-		m.Content = m.content.View()
-	}
-
 	// this is a pretty nasty hack to ensure the input area viewport doesn't
 	// scroll below its content, which can happen when the input viewport
 	// height has grown, or previously entered lines have been deleted
@@ -264,5 +263,8 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 		}
 	}
 
+	if len(cmds) > 0 {
 		return m, tea.Batch(cmds...)
+	}
+	return m, nil
 }

pkg/tui/views/chat/view.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/styles"
 	tuiutil "git.mlow.ca/mlow/lmcli/pkg/tui/util"
 	"github.com/charmbracelet/lipgloss"
@@ -16,15 +17,19 @@ import (
 
 // styles
 var (
+	boldStyle      = lipgloss.NewStyle().Bold(true)
+	faintStyle     = lipgloss.NewStyle().Faint(true)
+	boldFaintStyle = lipgloss.NewStyle().Faint(true).Bold(true)
+
 	messageHeadingStyle = lipgloss.NewStyle().
 				MarginTop(1).
-				MarginBottom(1).
+				MarginBottom(1)
-				PaddingLeft(1).
-				Bold(true)
 
-	userStyle = lipgloss.NewStyle().Faint(true).Foreground(lipgloss.Color("10"))
+	userStyle = boldFaintStyle.Foreground(lipgloss.Color("10"))
 
-	assistantStyle = lipgloss.NewStyle().Faint(true).Foreground(lipgloss.Color("12"))
+	assistantStyle = boldFaintStyle.Foreground(lipgloss.Color("12"))
+
+	systemStyle = boldStyle.Foreground(lipgloss.Color("8"))
 
 	messageStyle = lipgloss.NewStyle().
 			PaddingLeft(2).
@@ -37,40 +42,14 @@ var (
 				Faint(true).
 				Border(lipgloss.RoundedBorder(), true, true, true, false)
 
-	footerStyle = lipgloss.NewStyle()
+	footerStyle = lipgloss.NewStyle().Padding(0, 1)
 )
 
-func (m Model) View() string {
+func (m *Model) renderMessageHeading(i int, message *conversation.Message) string {
-	if m.Width == 0 {
-		return ""
-	}
-	sections := make([]string, 0, 6)
-
-	if m.Header != "" {
-		sections = append(sections, m.Header)
-	}
-
-	sections = append(sections, m.Content)
-	if m.Error != "" {
-		sections = append(sections, m.Error)
-	}
-	sections = append(sections, m.Input)
-
-	if m.Footer != "" {
-		sections = append(sections, m.Footer)
-	}
-
-	return lipgloss.JoinVertical(lipgloss.Left, sections...)
-}
-
-func (m *Model) renderMessageHeading(i int, message *api.Message) string {
-	icon := ""
 	friendly := message.Role.FriendlyRole()
-	style := lipgloss.NewStyle().Faint(true).Bold(true)
+	style := systemStyle
 
 	switch message.Role {
-	case api.MessageRoleSystem:
-		icon = "⚙️"
 	case api.MessageRoleUser:
 		style = userStyle
 	case api.MessageRoleAssistant:
@@ -78,70 +57,75 @@ func (m *Model) renderMessageHeading(i int, message *api.Message) string {
 	case api.MessageRoleToolCall:
 		style = assistantStyle
 		friendly = api.MessageRoleAssistant.FriendlyRole()
+	case api.MessageRoleSystem:
 	case api.MessageRoleToolResult:
-		icon = "🔧"
 	}
 
-	user := style.Render(icon + friendly)
+	user := style.Render(friendly)
 
-	var prefix string
+	var prefix, suffix string
-	var suffix string
 
-	faint := lipgloss.NewStyle().Faint(true)
+	if i == m.selectedMessage && m.focus == focusMessages {
+		prefix = "> "
+	} else {
+		prefix = " "
+	}
 
-	if i == 0 && len(m.rootMessages) > 1 && m.conversation.SelectedRootID != nil {
+	if i == 0 && m.App.Conversation.SelectedRootID != nil && len(m.App.Conversation.RootMessages) > 1 {
 		selectedRootIndex := 0
-		for j, reply := range m.rootMessages {
+		for j, reply := range m.App.Conversation.RootMessages {
-			if reply.ID == *m.conversation.SelectedRootID {
+			if reply.ID == *m.App.Conversation.SelectedRootID {
 				selectedRootIndex = j
 				break
 			}
 		}
-		suffix += faint.Render(fmt.Sprintf(" <%d/%d>", selectedRootIndex+1, len(m.rootMessages)))
+		suffix += faintStyle.Render(fmt.Sprintf(" <%d/%d>", selectedRootIndex+1, len(m.App.Conversation.RootMessages)))
 	}
-	if i > 0 && len(m.messages[i-1].Replies) > 1 {
+	if i > 0 && len(m.App.Messages[i-1].Replies) > 1 {
 		// Find the selected reply index
 		selectedReplyIndex := 0
-		for j, reply := range m.messages[i-1].Replies {
+		for j, reply := range m.App.Messages[i-1].Replies {
-			if reply.ID == *m.messages[i-1].SelectedReplyID {
+			if reply.ID == *m.App.Messages[i-1].SelectedReplyID {
 				selectedReplyIndex = j
 				break
 			}
 		}
-		suffix += faint.Render(fmt.Sprintf(" <%d/%d>", selectedReplyIndex+1, len(m.messages[i-1].Replies)))
+		suffix += faintStyle.Render(fmt.Sprintf(" <%d/%d>", selectedReplyIndex+1, len(m.App.Messages[i-1].Replies)))
-	}
-
-	if m.focus == focusMessages {
-		if i == m.selectedMessage {
-			prefix = "> "
-		}
 	}
 
 	if message.ID == 0 {
-		suffix += faint.Render(" (not saved)")
+		suffix += faintStyle.Render(" (not saved)")
 	}
 
-	return messageHeadingStyle.Render(prefix + user + suffix)
+	heading := prefix + user + suffix
+
+	if message.Metadata.GenerationModel != nil && m.showDetails {
+		heading += faintStyle.Render(
+			fmt.Sprintf(" | %s", *message.Metadata.GenerationModel),
+		)
+	}
+
+	return messageHeadingStyle.Render(heading)
 }
 
 // renderMessages renders the message at the given index as it should be shown
 // *at this moment* - we render differently depending on the current application
 // state (window size, etc, etc).
 func (m *Model) renderMessage(i int) string {
-	msg := &m.messages[i]
+	msg := &m.App.Messages[i]
 
 	// Write message contents
 	sb := &strings.Builder{}
 	sb.Grow(len(msg.Content) * 2)
 	if msg.Content != "" {
-		err := m.Shared.Ctx.Chroma.Highlight(sb, msg.Content)
+		err := m.App.Ctx.Chroma.Highlight(sb, msg.Content)
 		if err != nil {
 			sb.Reset()
 			sb.WriteString(msg.Content)
 		}
 	}
 
-	isLast := i == len(m.messages)-1
+	isLast := i == len(m.App.Messages)-1
 	isAssistant := msg.Role == api.MessageRoleAssistant
 
 	if m.state == pendingResponse && isLast && isAssistant {
@@ -167,7 +151,7 @@ func (m *Model) renderMessage(i int) string {
 
 		var toolResults []renderedResult
 		for _, result := range msg.ToolResults {
-			if m.showToolResults {
+			if m.showDetails {
 				var jsonResult interface{}
 				err := json.Unmarshal([]byte(result.Result), &jsonResult)
 				if err != nil {
@@ -205,7 +189,7 @@ func (m *Model) renderMessage(i int) string {
 		if msg.Content != "" {
 			sb.WriteString("\n\n")
 		}
-		_ = m.Shared.Ctx.Chroma.HighlightLang(sb, toolString, "yaml")
+		_ = m.App.Ctx.Chroma.HighlightLang(sb, toolString, "yaml")
 	}
 
 	content := strings.TrimRight(sb.String(), "\n")
@@ -223,13 +207,17 @@ func (m *Model) renderMessage(i int) string {
 
 // render the conversation into a string
 func (m *Model) conversationMessagesView() string {
-	sb := strings.Builder{}
+	m.messageOffsets = make([]int, len(m.App.Messages))
-
-	m.messageOffsets = make([]int, len(m.messages))
 	lineCnt := 1
-	for i, message := range m.messages {
+
+	sb := strings.Builder{}
+	for i, message := range m.App.Messages {
 		m.messageOffsets[i] = lineCnt
 
+		if !m.showDetails && message.Role.IsSystem() {
+			continue
+		}
+
 		heading := m.renderMessageHeading(i, &message)
 		sb.WriteString(heading)
 		sb.WriteString("\n")
@@ -242,80 +230,136 @@ func (m *Model) conversationMessagesView() string {
 	}
 
 	// Render a placeholder for the incoming assistant reply
-	if m.state == pendingResponse && m.messages[len(m.messages)-1].Role != api.MessageRoleAssistant {
+	if m.state == pendingResponse && m.App.Messages[len(m.App.Messages)-1].Role != api.MessageRoleAssistant {
-		heading := m.renderMessageHeading(-1, &api.Message{
+		heading := m.renderMessageHeading(-1, &conversation.Message{
 			Role: api.MessageRoleAssistant,
+			Metadata: conversation.MessageMeta{
+				GenerationModel: &m.App.Model,
+			},
 		})
 		sb.WriteString(heading)
 		sb.WriteString("\n")
 		sb.WriteString(messageStyle.Width(0).Render(m.replyCursor.View()))
 		sb.WriteString("\n")
 	}
-
 	return sb.String()
 }
 
-func (m *Model) headerView() string {
+func (m *Model) Content(width, height int) string {
+	// calculate clamped input height to accomodate input text
+	// minimum 4 lines, maximum half of content area
+	inputHeight := max(4, min(height/2, m.input.LineCount()))
+	m.input.SetHeight(inputHeight)
+	input := m.input.View()
+
+	// remaining height towards content
+	m.content.Width, m.content.Height = width, height-tuiutil.Height(input)
+	content := m.content.View()
+	return lipgloss.JoinVertical(lipgloss.Left, content, input)
+}
+
+func (m *Model) Header(width int) string {
 	titleStyle := lipgloss.NewStyle().Bold(true)
 	var title string
-	if m.conversation != nil && m.conversation.Title != "" {
+	if m.App.Conversation.Title != "" {
-		title = m.conversation.Title
+		title = m.App.Conversation.Title
 	} else {
 		title = "Untitled"
 	}
-	title = tuiutil.TruncateToCellWidth(title, m.Width-styles.Header.GetHorizontalPadding(), "...")
+	title = tuiutil.TruncateRightToCellWidth(title, width-styles.Header.GetHorizontalPadding(), "...")
 	header := titleStyle.Render(title)
-	return styles.Header.Width(m.Width).Render(header)
+	return styles.Header.Width(width).Render(header)
 }
 
-func (m *Model) footerView() string {
+func (m *Model) Footer(width int) string {
-	segmentStyle := lipgloss.NewStyle().PaddingLeft(1).PaddingRight(1).Faint(true)
+	segmentStyle := lipgloss.NewStyle().Faint(true)
-	segmentSeparator := "|"
+	segmentSeparator := segmentStyle.Render(" | ")
 
-	savingStyle := segmentStyle.Copy().Bold(true)
+	// Left segments
-	saving := ""
+	leftSegments := make([]string, 0, 4)
-	if m.persistence {
+
-		saving = savingStyle.Foreground(lipgloss.Color("2")).Render("✅💾")
+	if m.state == pendingResponse {
+		leftSegments = append(leftSegments, segmentStyle.Render(m.spinner.View()))
 	} else {
-		saving = savingStyle.Foreground(lipgloss.Color("1")).Render("❌💾")
+		leftSegments = append(leftSegments, segmentStyle.Render("∙∙∙"))
 	}
 
-	var status string
-	switch m.state {
-	case pendingResponse:
-		status = "Press ctrl+c to cancel" + m.spinner.View()
-	default:
-		status = "Press ctrl+s to send"
-	}
-
-	leftSegments := []string{
-		saving,
-		segmentStyle.Render(status),
-	}
-	rightSegments := []string{}
-
 	if m.elapsed > 0 && m.tokenCount > 0 {
 		throughput := fmt.Sprintf("%.0f t/sec", float64(m.tokenCount)/m.elapsed.Seconds())
-		rightSegments = append(rightSegments, segmentStyle.Render(throughput))
+		leftSegments = append(leftSegments, segmentStyle.Render(throughput))
 	}
 
-	model := fmt.Sprintf("Model: %s", *m.Shared.Ctx.Config.Defaults.Model)
+	// var status string
-	rightSegments = append(rightSegments, segmentStyle.Render(model))
+	// switch m.state {
+	// case pendingResponse:
+	// 	status = "Press ctrl+c to cancel"
+	// default:
+	// 	status = "Press ctrl+s to send"
+	// }
+	// leftSegments = append(leftSegments, segmentStyle.Render(status))
 
+	// Right segments
+	rightSegments := make([]string, 0, 8)
+
+	if m.App.Agent != nil {
+		rightSegments = append(rightSegments, segmentStyle.Render(m.App.Agent.Name))
+	}
+
+	model := segmentStyle.Render(m.App.ActiveModel(lipgloss.NewStyle()))
+	rightSegments = append(rightSegments, model)
+
+	savingStyle := segmentStyle.Bold(true)
+	saving := ""
+	if m.persistence {
+		saving = savingStyle.Foreground(lipgloss.Color("2")).Render("💾✅")
+	} else {
+		saving = savingStyle.Foreground(lipgloss.Color("1")).Render("💾❌")
+	}
+	rightSegments = append(rightSegments, saving)
+
+	return m.layoutFooter(width, leftSegments, rightSegments, segmentSeparator)
+}
+
+func (m *Model) layoutFooter(
+	width int,
+	leftSegments []string,
+	rightSegments []string,
+	segmentSeparator string,
+) string {
 	left := strings.Join(leftSegments, segmentSeparator)
 	right := strings.Join(rightSegments, segmentSeparator)
 
-	totalWidth := lipgloss.Width(left) + lipgloss.Width(right)
+	leftWidth := tuiutil.Width(left)
-	remaining := m.Width - totalWidth
+	rightWidth := tuiutil.Width(right)
+	sepWidth := tuiutil.Width(segmentSeparator)
+	frameWidth := footerStyle.GetHorizontalFrameSize()
 
-	var padding string
+	availableWidth := width - frameWidth - leftWidth - rightWidth
-	if remaining > 0 {
+
-		padding = strings.Repeat(" ", remaining)
+	if availableWidth >= sepWidth {
+		// Everything fits
+		padding := strings.Repeat(" ", availableWidth)
+		return footerStyle.Render(left + padding + right)
 	}
 
-	footer := left + padding + right
+	// Inserted between left and right segments when they're being truncated
-	if remaining < 0 {
+	div := "..."
-		footer = tuiutil.TruncateToCellWidth(footer, m.Width, "...")
+
+	totalAvailableWidth := width - frameWidth
+	availableTruncWidth := totalAvailableWidth - len(div)
+
+	minVisibleLength := 3
+	if availableTruncWidth < 2*minVisibleLength {
+		minVisibleLength = availableTruncWidth / 2
 	}
-	return footerStyle.Width(m.Width).Render(footer)
+
+	leftProportion := float64(leftWidth) / float64(leftWidth+rightWidth)
+
+	newLeftWidth := int(max(float64(minVisibleLength), leftProportion*float64(availableTruncWidth)))
+	newRightWidth := totalAvailableWidth - newLeftWidth
+
+	truncatedLeft := faintStyle.Render(tuiutil.TruncateRightToCellWidth(left, newLeftWidth, ""))
+	truncatedRight := faintStyle.Render(tuiutil.TruncateLeftToCellWidth(right, newRightWidth, "..."))
+
+	return footerStyle.Width(width).Render(truncatedLeft + truncatedRight)
 }

pkg/tui/views/conversations/conversations.go

@@ -5,8 +5,9 @@ import (
 	"strings"
 	"time"
 
-	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/conversation"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/bubbles"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
 	"git.mlow.ca/mlow/lmcli/pkg/tui/styles"
 	tuiutil "git.mlow.ca/mlow/lmcli/pkg/tui/util"
@@ -16,67 +17,56 @@ import (
 	"github.com/charmbracelet/lipgloss"
 )
 
-type loadedConversation struct {
-	conv      api.Conversation
-	lastReply api.Message
-}
-
 type (
 	// sent when conversation list is loaded
-	msgConversationsLoaded ([]loadedConversation)
+	msgConversationsLoaded conversation.ConversationList
-	// sent when a conversation is selected
+	// sent when a single conversation is loaded
-	msgConversationSelected api.Conversation
+	msgConversationLoaded conversation.Conversation
 	// sent when a conversation is deleted
 	msgConversationDeleted struct{}
 )
 
-// Prompt payloads
-type (
-	deleteConversationPayload api.Conversation
-)
-
 type Model struct {
-	shared.Shared
+	App    *model.AppModel
-	shared.Sections
+	width  int
+	height int
 
-	conversations []loadedConversation
+	cursor      int
-	cursor        int   // index of the currently selected conversation
+	itemOffsets []int // conversation y offsets
-	itemOffsets   []int // keeps track of the viewport y offset of each rendered item
 
 	content       viewport.Model
-
 	confirmPrompt bubbles.ConfirmPrompt
 }
 
-func Conversations(shared shared.Shared) Model {
+func Conversations(app *model.AppModel) *Model {
+	viewport.New(0, 0)
 	m := Model{
-		Shared:  shared,
+		App:     app,
 		content: viewport.New(0, 0),
 	}
-	return m
+	return &m
 }
 
-func (m *Model) HandleInput(msg tea.KeyMsg) (bool, tea.Cmd) {
+func (m *Model) handleInput(msg tea.KeyMsg) tea.Cmd {
 	if m.confirmPrompt.Focused() {
 		var cmd tea.Cmd
 		m.confirmPrompt, cmd = m.confirmPrompt.Update(msg)
 		if cmd != nil {
-			return true, cmd
+			return cmd
 		}
 	}
 
+	conversations := m.App.Conversations.Items
+
 	switch msg.String() {
 	case "enter":
-		if len(m.conversations) > 0 && m.cursor < len(m.conversations) {
+		if len(conversations) > 0 && m.cursor < len(conversations) {
-			return true, func() tea.Msg {
+			return m.loadConversation(conversations[m.cursor].ID)
-				return msgConversationSelected(m.conversations[m.cursor].conv)
-			}
 		}
 	case "j", "down":
-		if m.cursor < len(m.conversations)-1 {
+		if m.cursor < len(conversations)-1 {
 			m.cursor++
-			if m.cursor == len(m.conversations)-1 {
+			if m.cursor == len(conversations)-1 {
-				// if last conversation, simply scroll to the bottom
 				m.content.GotoBottom()
 			} else {
 				// this hack positions the *next* conversatoin slightly
@@ -86,10 +76,10 @@ func (m *Model) HandleInput(msg tea.KeyMsg) (bool, tea.Cmd) {
 			}
 			m.content.SetContent(m.renderConversationList())
 		} else {
-			m.cursor = len(m.conversations) - 1
+			m.cursor = len(conversations) - 1
 			m.content.GotoBottom()
 		}
-		return true, nil
+		return shared.KeyHandled(msg)
 	case "k", "up":
 		if m.cursor > 0 {
 			m.cursor--
@@ -103,23 +93,24 @@ func (m *Model) HandleInput(msg tea.KeyMsg) (bool, tea.Cmd) {
 			m.cursor = 0
 			m.content.GotoTop()
 		}
-		return true, nil
+		return shared.KeyHandled(msg)
 	case "n":
-		// new conversation
+		m.App.NewConversation()
+		return shared.ChangeView(shared.ViewChat)
 	case "d":
-		if !m.confirmPrompt.Focused() && len(m.conversations) > 0 && m.cursor < len(m.conversations) {
+		if !m.confirmPrompt.Focused() && len(conversations) > 0 && m.cursor < len(conversations) {
-			title := m.conversations[m.cursor].conv.Title
+			title := conversations[m.cursor].Title
 			if title == "" {
 				title = "(untitled)"
 			}
 			m.confirmPrompt = bubbles.NewConfirmPrompt(
 				fmt.Sprintf("Delete '%s'?", title),
-				deleteConversationPayload(m.conversations[m.cursor].conv),
+				conversations[m.cursor],
 			)
 			m.confirmPrompt.Style = lipgloss.NewStyle().
 				Bold(true).
 				Foreground(lipgloss.Color("3"))
-			return true, nil
+			return shared.KeyHandled(msg)
 		}
 	case "c":
 		// copy/clone conversation
@@ -128,122 +119,115 @@ func (m *Model) HandleInput(msg tea.KeyMsg) (bool, tea.Cmd) {
 	case "shift+r":
 		// show prompt to generate name for conversation
 	}
-	return false, nil
-}
-
-func (m Model) Init() tea.Cmd {
 	return nil
 }
 
-func (m *Model) HandleResize(width, height int) {
+func (m *Model) Init() tea.Cmd {
-	m.Width, m.Height = width, height
+	return nil
-	m.content.Width = width
 }
 
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+func (m *Model) Update(msg tea.Msg) (shared.ViewModel, tea.Cmd) {
+	isInput := false
+	inputHandled := false
+
 	var cmds []tea.Cmd
 	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		isInput = true
+		cmd := m.handleInput(msg)
+		if cmd != nil {
+			cmds = append(cmds, cmd)
+			inputHandled = true
+		}
 	case shared.MsgViewEnter:
 		cmds = append(cmds, m.loadConversations())
 		m.content.SetContent(m.renderConversationList())
 	case tea.WindowSizeMsg:
-		m.HandleResize(msg.Width, msg.Height)
+		m.width, m.height = msg.Width, msg.Height
 		m.content.SetContent(m.renderConversationList())
 	case msgConversationsLoaded:
-		m.conversations = msg
+		m.App.Conversations = conversation.ConversationList(msg)
-		m.cursor = max(0, min(len(m.conversations), m.cursor))
+		m.cursor = max(0, min(len(m.App.Conversations.Items), m.cursor))
 		m.content.SetContent(m.renderConversationList())
-	case msgConversationSelected:
+	case msgConversationLoaded:
-		m.Values.ConvShortname = msg.ShortName.String
+		m.App.ClearConversation()
+		m.App.Conversation = conversation.Conversation(msg)
 		cmds = append(cmds, func() tea.Msg {
-			return shared.MsgViewChange(shared.StateChat)
+			return shared.MsgViewChange(shared.ViewChat)
 		})
 	case bubbles.MsgConfirmPromptAnswered:
 		m.confirmPrompt.Blur()
 		if msg.Value {
-			switch payload := msg.Payload.(type) {
+			conv, ok := msg.Payload.(conversation.ConversationListItem)
-			case deleteConversationPayload:
+			if ok {
-				cmds = append(cmds, m.deleteConversation(api.Conversation(payload)))
+				cmds = append(cmds, m.deleteConversation(conv))
 			}
 		}
 	case msgConversationDeleted:
 		cmds = append(cmds, m.loadConversations())
 	}
 
-	var cmd tea.Cmd
+	if !isInput || !inputHandled {
-	m.content, cmd = m.content.Update(msg)
+		content, cmd := m.content.Update(msg)
+		m.content = content
 		if cmd != nil {
 			cmds = append(cmds, cmd)
 		}
+	}
 
-	if m.Width > 0 {
+	if len(cmds) > 0 {
-		wrap := lipgloss.NewStyle().Width(m.Width)
-		m.Header = m.headerView()
-		m.Footer = "" // TODO: "Press ? for help"
-		if m.confirmPrompt.Focused() {
-			m.Footer = wrap.Render(m.confirmPrompt.View())
-		}
-		m.Error = tuiutil.ErrorBanner(m.Err, m.Width)
-		fixedHeight := tuiutil.Height(m.Header) + tuiutil.Height(m.Error) + tuiutil.Height(m.Footer)
-		m.content.Height = m.Height - fixedHeight
-		m.Content = m.content.View()
-	}
 		return m, tea.Batch(cmds...)
+	}
+
+	return m, nil
 }
 
 func (m *Model) loadConversations() tea.Cmd {
 	return func() tea.Msg {
-		messages, err := m.Ctx.Store.LatestConversationMessages()
+		list, err := m.App.Ctx.Conversations.LoadConversationList()
 		if err != nil {
-			return shared.MsgError(fmt.Errorf("Could not load conversations: %v", err))
+			return shared.AsMsgError(fmt.Errorf("Could not load conversations: %v", err))
 		}
-
+		return msgConversationsLoaded(list)
-		loaded := make([]loadedConversation, len(messages))
-		for i, m := range messages {
-			loaded[i].lastReply = m
-			loaded[i].conv = *m.Conversation
-		}
-
-		return msgConversationsLoaded(loaded)
 	}
 }
 
-func (m *Model) deleteConversation(conv api.Conversation) tea.Cmd {
+func (m *Model) loadConversation(conversationID uint) tea.Cmd {
 	return func() tea.Msg {
-		err := m.Ctx.Store.DeleteConversation(&conv)
+		conversation, err := m.App.Ctx.Conversations.GetConversationByID(conversationID)
 		if err != nil {
-			return shared.MsgError(fmt.Errorf("Could not delete conversation: %v", err))
+			return shared.AsMsgError(fmt.Errorf("Could not load conversation %d: %v", conversationID, err))
+		}
+		return msgConversationLoaded(*conversation)
+	}
+}
+
+func (m *Model) deleteConversation(conv conversation.ConversationListItem) tea.Cmd {
+	return func() tea.Msg {
+		err := m.App.Ctx.Conversations.DeleteConversationById(conv.ID)
+		if err != nil {
+			return shared.AsMsgError(fmt.Errorf("Could not delete conversation: %v", err))
 		}
 		return msgConversationDeleted{}
 	}
 }
 
-func (m Model) View() string {
+func (m *Model) Header(width int) string {
-	if m.Width == 0 {
-		return ""
-	}
-	sections := make([]string, 0, 6)
-
-	if m.Header != "" {
-		sections = append(sections, m.Header)
-	}
-
-	sections = append(sections, m.Content)
-	if m.Error != "" {
-		sections = append(sections, m.Error)
-	}
-
-	if m.Footer != "" {
-		sections = append(sections, m.Footer)
-	}
-
-	return lipgloss.JoinVertical(lipgloss.Left, sections...)
-}
-
-func (m *Model) headerView() string {
 	titleStyle := lipgloss.NewStyle().Bold(true)
 	header := titleStyle.Render("Conversations")
-	return styles.Header.Width(m.Width).Render(header)
+	return styles.Header.Width(width).Render(header)
+}
+
+func (m *Model) Content(width int, height int) string {
+	m.content.Width, m.content.Height = width, height
+	return m.content.View()
+}
+
+func (m *Model) Footer(width int) string {
+	if m.confirmPrompt.Focused() {
+		return lipgloss.NewStyle().Width(width).Render(m.confirmPrompt.View())
+	}
+	return ""
 }
 
 func (m *Model) renderConversationList() string {
@@ -289,12 +273,12 @@ func (m *Model) renderConversationList() string {
 		sb              strings.Builder
 	)
 
-	m.itemOffsets = make([]int, len(m.conversations))
+	m.itemOffsets = make([]int, len(m.App.Conversations.Items))
 	sb.WriteRune('\n')
 	currentOffset += 1
 
-	for i, c := range m.conversations {
+	for i, c := range m.App.Conversations.Items {
-		lastReplyAge := now.Sub(c.lastReply.CreatedAt)
+		lastReplyAge := now.Sub(c.LastMessageAt)
 
 		var category string
 		for _, g := range categories {
@@ -313,15 +297,15 @@ func (m *Model) renderConversationList() string {
 			sb.WriteRune('\n')
 		}
 
-		tStyle := titleStyle.Copy()
+		tStyle := titleStyle
-		if c.conv.Title == "" {
+		if c.Title == "" {
 			tStyle = tStyle.Inherit(untitledStyle).SetString("(untitled)")
 		}
 		if i == m.cursor {
 			tStyle = tStyle.Inherit(selectedStyle)
 		}
 
-		title := tStyle.Width(m.Width - 3).PaddingLeft(2).Render(c.conv.Title)
+		title := tStyle.Width(m.width - 3).PaddingLeft(2).Render(c.Title)
 		if i == m.cursor {
 			title = ">" + title[1:]
 		}
@@ -334,7 +318,7 @@ func (m *Model) renderConversationList() string {
 		))
 		sb.WriteString(item)
 		currentOffset += tuiutil.Height(item)
-		if i < len(m.conversations)-1 {
+		if i < len(m.App.Conversations.Items)-1 {
 			sb.WriteRune('\n')
 		}
 	}

pkg/tui/views/settings/settings.go

@@ -0,0 +1,137 @@
+package settings
+
+import (
+	"strings"
+
+	"git.mlow.ca/mlow/lmcli/pkg/tui/bubbles/list"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/model"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/shared"
+	"git.mlow.ca/mlow/lmcli/pkg/tui/styles"
+	"github.com/charmbracelet/bubbles/viewport"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+type Model struct {
+	App       *model.AppModel
+	prevView  shared.View
+	content   viewport.Model
+	modelList list.Model
+	width     int
+	height    int
+}
+
+type modelOpt struct {
+	provider string
+	model    string
+}
+
+const (
+	modelListId int = iota + 1
+)
+
+func Settings(app *model.AppModel) *Model {
+	m := &Model{
+		App:     app,
+		content: viewport.New(0, 0),
+	}
+	return m
+}
+
+func (m *Model) Init() tea.Cmd {
+	m.modelList = list.NewWithGroups(m.getModelOptions())
+	m.modelList.ID = modelListId
+	return nil
+}
+
+func (m *Model) Update(msg tea.Msg) (shared.ViewModel, tea.Cmd) {
+	var cmd tea.Cmd
+
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		m.modelList, cmd = m.modelList.Update(msg)
+		if cmd != nil {
+			return m, cmd
+		}
+
+		switch msg.String() {
+		case "esc":
+			return m, func() tea.Msg {
+				return shared.MsgViewChange(m.prevView)
+			}
+		}
+	case shared.MsgViewEnter:
+		m.prevView = shared.View(msg)
+		m.modelList.Focus()
+		m.content.SetContent(m.renderContent())
+	case tea.WindowSizeMsg:
+		m.width, m.height = msg.Width, msg.Height
+		m.content.Width = msg.Width
+		m.content.Height = msg.Height
+		m.content.SetContent(m.renderContent())
+	case list.MsgOptionSelected:
+		switch msg.ID {
+		case modelListId:
+			if modelOpt, ok := msg.Option.Value.(modelOpt); ok {
+				m.App.Model = modelOpt.model
+				m.App.ProviderName = modelOpt.provider
+			}
+			return m, shared.ChangeView(m.prevView)
+		}
+	}
+
+	m.modelList, cmd = m.modelList.Update(msg)
+	if cmd != nil {
+		return m, cmd
+	}
+
+	m.content.SetContent(m.renderContent())
+	return m, nil
+}
+
+func (m *Model) getModelOptions() []list.OptionGroup {
+	modelOpts := []list.OptionGroup{}
+	for _, p := range m.App.Ctx.Config.Providers {
+		provider := p.Name
+		if provider == "" {
+			provider = p.Kind
+		}
+		providerLabel := p.Display
+		if providerLabel == "" {
+			providerLabel = strings.ToUpper(provider[:1]) + provider[1:]
+		}
+		group := list.OptionGroup{
+			Name: providerLabel,
+		}
+		for _, model := range p.Models {
+			group.Options = append(group.Options, list.Option{
+				Label: model,
+				Value: modelOpt{provider, model},
+			})
+		}
+		modelOpts = append(modelOpts, group)
+	}
+	return modelOpts
+}
+
+func (m *Model) Header(width int) string {
+	boldStyle := lipgloss.NewStyle().Bold(true)
+	// TODO: update header depending on active settings mode (model, agent, etc)
+	header := boldStyle.Render("Model selection")
+	return styles.Header.Width(width).Render(header)
+}
+
+func (m *Model) Content(width, height int) string {
+	// TODO: see Header()
+	currentModel := " Active model: " + m.App.ActiveModel(lipgloss.NewStyle())
+	m.modelList.Width, m.modelList.Height = width, height - 2
+	return "\n" + currentModel + "\n" + m.modelList.View()
+}
+
+func (m *Model) Footer(width int) string {
+	return ""
+}
+
+func (m *Model) renderContent() string {
+	return m.modelList.View()
+}

pkg/util/util.go

@@ -138,7 +138,7 @@ func SetStructDefaults(data interface{}) bool {
 
 		// Get the "default" struct tag
 		defaultTag, ok := v.Type().Field(i).Tag.Lookup("default")
-		if (!ok) {
+		if !ok {
 			continue
 		}