fix(web): title sessions created by host

packages/host/runtime/src/boot.ts

@@ -8,6 +8,7 @@ import { Context } from 'cordis'
 import Timer from '@cordisjs/plugin-timer'
 import LlmService from '@deepseek-ai/dsh-llm'
 import SessionStore from '@deepseek-ai/dsh-session'
+import SessionTitleService, { type Config as SessionTitleConfig } from '@deepseek-ai/dsh-session-title'
 import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
 import ToolRegistry from '@deepseek-ai/dsh-tools'
 import AgentRegistry from '@deepseek-ai/dsh-agent'
@@ -38,6 +39,13 @@ import * as timeoutPolicy from '@deepseek-ai/dsh-timeout-policy'
 import SpillLocal from '@deepseek-ai/dsh-spill-local'
 import * as spillPolicy from '@deepseek-ai/dsh-spill-policy'
 
+/** Default deterministic title policy for sessions created through the host. */
+const DEFAULT_SESSION_TITLE_CONFIG: SessionTitleConfig = {
+  fallbackMaxWords: 5,
+  fallbackMaxBytes: 40,
+  maxTitleBytes: 80,
+}
+
 /** Options for bootHost — the assembly-layer composition knobs. */
 export interface BootHostOptions {
   /** Root directory for JSONL session persistence. */
@@ -46,6 +54,8 @@ export interface BootHostOptions {
   provider?: string
   /** Default model id (defaults to 'deepseek-v4-flash', matching the demos). */
   model?: string
+  /** Deterministic fallback-title limits; no asynchronous title provider is mounted by the host. */
+  sessionTitle?: SessionTitleConfig
   /**
    * Default project directory for sessions created without an explicit cwd
    * (defaults to the host process working directory). A session's cwd is its
@@ -89,6 +99,7 @@ export async function bootHost(options: BootHostOptions): Promise<HostHandle> {
   await ctx.plugin(Timer)
   await ctx.plugin(LlmService)
   await ctx.plugin(SessionStore)
+  await ctx.plugin(SessionTitleService, options.sessionTitle ?? DEFAULT_SESSION_TITLE_CONFIG)
   await ctx.plugin(SystemPrompt, { persona: '' })
   await ctx.plugin(ToolRegistry)
   await ctx.plugin(AgentRegistry)

packages/host/runtime/src/start.ts

@@ -16,10 +16,9 @@ import { createApiProxy } from './api-proxy.ts'
 /** Options for startHost. */
 export interface StartHostOptions {
   /**
-   * Passed through to bootHost verbatim (persistenceRoot required +
-   * provider?/model?). Future host-level knobs (profile, log sink — any
-   * output added to the assembly MUST be switchable off here) land as
-   * additive fields.
+   * Passed through to bootHost verbatim. Future host-level knobs (profile,
+   * log sink — any output added to the assembly MUST be switchable off here)
+   * land as additive fields.
    */
   boot: BootHostOptions
 }