[Superseded by #1057] Generate conversation titles with a secondary model

[PeterDaveHello]

Superseded by #1057, which rebuilds the implementation from a clean branch and carries forward the relevant review feedback.

Original summary

• Replace locale-dependent date/time session names with an untitled display fallback using a stable YYYY-MM-DD HH:mm timestamp.
• Let users opt in and select an enabled OpenAI-compatible chat model specifically for conversation-title generation.
• Generate a semantic title from the first completed user/assistant exchange instead of truncating the first prompt line.
• Keep both the beginning and end of long prompts so role instructions and boilerplate do not hide the actual task near the end.
• Send one non-streaming request per new conversation, with a 64-token output cap and a 15-second timeout.
• Reuse the selected provider's current endpoint and credentials without copying API keys into the title-model setting.
• Protect conversation history and title updates with serialized storage mutations, generation IDs, stale-request recovery, and delete/race guards.
• Preserve all existing non-empty titles; historical date titles are not automatically rewritten.

Refs #481 and #228.

[coderabbitai]

Important

Draft PR not reviewed

Draft PRs are not automatically reviewed by default.

• Trigger a manual review

To automatically review draft PRs, update your CodeRabbit configuration:

reviews:
  auto_review:
    drafts: true

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[Copilot]

Pull request overview

Adds an opt-in, OpenAI-compatible secondary model flow to automatically generate semantic conversation titles from the first completed exchange, while introducing safer session-title storage semantics and a stable timestamp-based “untitled” display fallback.

Changes:

• Introduces session-title utilities for prompt shaping, response sanitization, grapheme-safe truncation, and timestamp display fallbacks.
• Adds per-session title-generation state (claim/complete/fail) with serialized storage mutations and stale-request recovery.
• Adds popup settings + storage-backed hook to select/enable a dedicated “conversation title model”, and wires auto-generation into the Independent Panel.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/unit/services/session-title.test.mjs	Unit tests for title message building, sanitization, truncation, timestamp fallback, and request shaping.
tests/unit/services/local-session-title.test.mjs	Concurrency/race tests for session updates vs title-generation state updates.
tests/unit/services/init-session-title.test.mjs	Tests default/init behavior for new session title-generation metadata fields.
tests/unit/hooks/conversation-title-config.test.mjs	Tests default config + persistence behavior (including stripping copied API keys).
src/services/session-title.mjs	Implements title-generation request construction, response extraction/sanitization, and fallback display naming.
src/services/local-session.mjs	Adds serialized session mutations + title-generation claim/complete/fail APIs and preserves stored title state on stale writes.
src/services/init-session.mjs	Extends session schema to include title source and title-generation metadata.
src/services/conversation-title-model.mjs	Adds availability check for the configured title model/provider (chat-only).
src/popup/sections/FeaturePages.jsx	Adds UI controls to enable auto title generation and select a dedicated title model.
src/pages/IndependentPanel/App.jsx	Wires title-generation lifecycle into session updates and displays fallback session names.
src/hooks/use-conversation-title-config.mjs	Implements persisted storage + reactive hook for title-generation settings.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[pullfrog]

Important

Two things to address before merge: a transient title-generation failure permanently strands the conversation without a title (the new failed state is terminal and never retried), and the new settings strings bypass the localization pipeline — no keys were added to src/_locales/en/main.json or any other locale.

Reviewed changes

• Title configuration hook — use-conversation-title-config.mjs persists autoGenerateConversationTitle + conversationTitleApiMode in storage.local, normalizes the api mode via canonicalizeApiMode, and strips any copied apiKey before saving so the runtime always re-resolves credentials from config.providerSecrets.
• Title generation on first exchange — IndependentPanel/App.jsx starts a single non-streaming title request once a conversation has exactly one completed exchange, guarded by an in-flight Set, a serialized claim/complete/fail protocol with generation IDs, stale-pending recovery, and delete/race guards.
• Popup settings — FeaturePages.jsx adds a checkbox + model selector limited to enabled OpenAI-compatible chat endpoints (native Anthropic/Azure/web modes don't resolve through resolveOpenAICompatibleRequest, so they are excluded as stated).
• Prompt, sanitizer, request — session-title.mjs builds a system+user transcript with grapheme-safe head/tail truncation, sanitizes the reply (reasoning blocks, code fences, labels), caps output at 64 tokens with a 15s timeout, and provides a stable YYYY-MM-DD HH:mm fallback display name for untitled sessions.
• Session write safety — local-session.mjs/init-session.mjs serialize mutations, preserve managed title state across stale conversation writes, and default new sessions to untitled (sessionName: null).
• Tests — unit tests for the config hook, session metadata, the claim/complete/fail state machine, and prompt/request/sanitize behavior (20 tests, all passing locally).

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using DeepSeek Flash (free via Pullfrog for OSS) ｜ 𝕏}