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feat(web): support reasoning effort selection

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Yichen Jiang
2026-07-27 16:12:40 +08:00
parent 39c60d5d64
commit 0d084ab6ff
26 changed files with 628 additions and 180 deletions
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packages/client/ui-model/README.md
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English | [中文](README.zh.md)
Model selection plugin, browser half: TWO entries over ONE per-session directory owned by `ModelService` (`ctx.models`). The `/model` popupSelect contribution (registered through `ctx.command`) and the composer's named `conversation.input.model` seat (a compact trigger + upward provider-grouped menu, figma 313:14108's ToggleButton chrome) both load the session's advisory directory through `session.models` and submit through `session.selectModel` via the same `ModelDirectory` instance — the host-reported current target is the single fact both surfaces echo, so a switch made in either entry is what the other shows next. Directory loads and selections share a generation counter (an older response never overwrites a newer one); a connection reset drops every resident projection and repulls the Host-restored target before displaying it again. Provider-local catalog failures list inline while usable groups stay selectable; whole-request and selection failures surface on each entry's own retry face (the popup shell's error/retry, the seat menu's inline error) without forking the state. Directories are per-session, resolved lazily through `ctx.models.directoryFor(sessionId)`, and disposed with the session scope.
Model selection plugin, browser half: TWO entries over ONE per-session directory owned by `ModelService` (`ctx.models`). The `/model` popupSelect contribution (registered through `ctx.command`) and the composer's named `conversation.input.model` seat both load the session's advisory directory through `session.models` and submit through `session.selectModel` via the same `ModelDirectory` instance. The compact composer trigger opens a two-level Model/Effort menu: models stay provider-grouped, while the selected exact model supplies its adapter-owned effort names, descriptions, and default. The Host-reported provider/model/reasoning target is the single fact both entries echo; `/model` applies the selected model's default effort, and the composer can then choose any advertised effort. Directory loads and selections share a generation counter so an older response never overwrites a newer one; a connection reset drops every resident projection and repulls the Host-restored target before display. Provider-local metadata failures list inline while usable groups stay selectable, and selection failures retain the prior target and directory. Directories are per-session, resolved lazily through `ctx.models.directoryFor(sessionId)`, and disposed with the session scope.
The `/client` export surface is the plugin body (`apply`/`inject`), `ModelService`, `ModelDirectory` with its state shape, and the seat's injected face type.
## Model Experience
Indirectly, through the `session.selectModel` RPC both entries submit: the host snapshots the selected provider/model pair at the next prompt-assembly boundary, so the following request routes (and stamps its prompt variables) with the chosen target while a running step keeps its assembled one — the directory, both menus, and every selection interaction stay client-side and never enter the session log.
Indirectly, through the `session.selectModel` RPC both entries submit: the Host snapshots the selected provider/model/reasoning target at the next prompt-assembly boundary, so the following request uses the chosen route and effort while a running step keeps its assembled target. The selection becomes durable only when the existing request header records a request that consumes it; menu interaction adds no prompt content.
#### KV Cache effect
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## Known Limitations and Deferred Work
- **No create-time selection** — both entries address an existing session's agent; there is no draft-phase model choice to fold into session creation (the seed order at the host's `targetFor` documents where such a tier would go).
- **Directory names are presentation-only** — selection and persistence use provider/model ids; a provider whose catalog lookup fails lists as an unselectable failure row until reload.
- **The seat shows no effort level** — the figma mock's `High` text has no wire concept behind it yet; the trigger renders the model name alone.
- **Directory names are presentation-only** — selection and persistence use provider/model/effort ids; a provider whose catalog or exact-model metadata lookup fails lists as an unselectable failure row until reload.
- **No arbitrary effort input** — the composer offers only the exact model's adapter-advertised levels; an adapter without reasoning metadata leaves the Effort row absent.