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fix(web): generate model-backed session titles

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Tianyi Cui
2026-07-23 18:20:17 +08:00
parent a60258b485
commit f666c39379
20 changed files with 142 additions and 29 deletions
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packages/host/runtime/README.md
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@@ -1,6 +1,6 @@
# @deepseek-ai/dsh-host-runtime
Host runtime assembly for `dsh`: `bootHost` composes the core plugin spine (LLM service + DeepSeek adapter, sessions with JSONL persistence and deterministic fallback titles, system prompt, tools, agents, agent loop, local bash), `createApiProxy` implements the [`dsh-host-apiproxy`](../apiproxy/README.md) contract over that composition, and `startHost` is the one-step shell seam returning `{ api, handler, defaults, ctx, dispose }`.
Host runtime assembly for `dsh`: `bootHost` composes the core plugin spine (LLM service + DeepSeek adapter, sessions with JSONL persistence, immediate fallback titles and first-message model summaries, system prompt, tools, agents, agent loop, local bash), `createApiProxy` implements the [`dsh-host-apiproxy`](../apiproxy/README.md) contract over that composition, and `startHost` is the one-step shell seam returning `{ api, handler, defaults, ctx, dispose }`.
Which plugins mount and with what defaults is decided only here — shells must not `ctx.plugin` to alter the assembly. `RunningHost.ctx` is a formal seam with exactly two sanctioned uses: mounting protocol front-door plugins (e.g. a future `dsh acp`) and headless session-event subscription; consuming clients must not bypass `api` through it.
@@ -12,7 +12,8 @@ Which plugins mount and with what defaults is decided only here — shells must
| `provider` | `'deepseek'` | Default provider route injected as agentOptions on create/resume and reported by `host.describe`. |
| `model` | `'deepseek-v4-flash'` | Default model id, same single source as `provider`. |
| `cwd` | `process.cwd()` | Default project directory for a session whose create request omits `cwd`. |
| `sessionTitle` | 5 words / 40 fallback bytes / 80 accepted bytes | Deterministic fallback-title limits. The host mounts no asynchronous title provider, so title creation adds no model call. |
| `sessionTitle` | 5 words / 40 fallback bytes / 80 accepted bytes | Deterministic fallback and accepted-title limits. |
| `sessionTitleLlm` | 5 words / 10 CJK chars / 4,096 input bytes / 64 output tokens / 60 s | First-message model-title policy. An omitted route inherits the logged main-request provider and model. |
## ApiProxy implementation notes
@@ -20,11 +21,11 @@ Unary methods take the narrow `RpcRequest<P>` and echo `request.rpcId`; a prompt
## Model Experience
Indirectly, through the model-facing plugins bootHost mounts and the provider/model defaults injected into created and resumed agents.
Indirectly, through the non-blocking first-message title request owned by [`dsh-session-title-llm`](../../session-title/session-title-llm/README.md) and the other model-facing plugins `bootHost` mounts.
#### KV Cache effect
No direct invalidation; the mounted model-facing plugins own their request-prefix changes.
No main-request invalidation; the auxiliary title request has its own cache behavior and the conversation prefix remains unchanged.
## Known Limitations and Deferred Work