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feat(web): add session model selector

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Yichen Jiang
2026-07-24 14:55:54 +08:00
parent bc7a89b81f
commit 208a44a7ec
87 changed files with 2236 additions and 87 deletions
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packages/host/runtime/README.md
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@@ -20,6 +20,8 @@ Which plugins mount and with what defaults is decided only here — shells must
Unary methods take the narrow `RpcRequest<P>` and echo `request.rpcId`; a prompt's rpcId rides `MessageSource` into the `user/message` event so clients can promote optimistic echoes. `history`/`prompt` on a cold session implicitly resume it, deduplicating concurrent calls through an in-flight table; `history` paginates backwards on message boundaries (never mid-message). The mux stream replays a `session/subscribed` baseline per attached session and every still-pending question with its original rpcId. Question responses, including blank per-item answers, are validated against the owning session and exact request before an atomic first-wins claim; answer, whole-request cancellation, owner abort, and provider disposal broadcast `question/resolved`. The host stream carries session lifecycle, running flips, and `agent/error` as the only outlet for live failures with no turn position.
The Web front door installs the shared `installAgentLlmTarget` coupling for every created or resumed agent. A session starts from the latest logged `request/header` route when one exists, otherwise from the Host default. `session.models` discovers every registered provider concurrently, keeps successful groups when another provider fails, and inserts the current target as an unlisted row when its provider omits it. A selection changes the mutable session target immediately; prompt assembly snapshots it atomically with request routing, so a change during a running step first applies to the next assembled step.
## Model Experience
Indirectly, through the non-blocking first-message title request owned by [`dsh-session-title-llm`](../../session-title/session-title-llm/README.md) when `sessionTitleLlm` is enabled, the provider/model defaults injected into created and resumed agents, the other model-facing plugins `bootHost` mounts, and the logged [workspace-instruction prefix](../../context/workspace-context/README.md#prompt-shape) when `workspaceContext` is enabled.