Add session topic tag, auto-generated session title, and /rename command

What would you like to be added?

Three related features to improve session management and UX:

1. Session topic tag in the input area — A small pill/tag displayed in the top-right corner of the input area (not the status line) showing the current session's topic or title, similar to Claude Code's auto-detect-terminal-theme tag. The tag only appears after a title has been generated (auto or manual).

2. Auto-generated session title — After the conversation has accumulated enough context, automatically generate a concise, descriptive title from the conversation via LLM. This is not triggered immediately at session start — it fires lazily once sufficient context exists. The title is persisted alongside session metadata and displayed in the input area tag.

3. /rename command — A new slash command to rename the current session:

   • /rename (no args): Auto-generate a title from the current conversation and apply it.
   • /rename <new-title>: Set the session title to the provided argument.
   • The renamed title is persisted and shown in the input area tag, /resume session picker, and anywhere session titles are displayed.

Why is this needed?

This is how session abstract is shown in claude:

• When reaching enough context, claude will automatically summarize current session and generate an abstract, showing it in the top-right section:

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• You can rename the session name with /rename command:

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• It shows the session name(if generated or renamed manually) when you show the history session list with /resume command:

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Needed Reasons

• Session identification: When using /resume, sessions are currently listed by the raw first user prompt (e.g., "你好", "fix bugs"), which is often unhelpful for identification. AI-generated titles like "fix terminal theme detection" are much more scannable.
• UX parity: Claude Code displays a topic tag in the input area, giving users at-a-glance awareness of what the current session is about. Qwen Code lacks this visual affordance.
• Session management: Users frequently want to rename sessions post-hoc (e.g., after a conversation evolves beyond its initial topic). Without a /rename command, there is no way to update a session's display name.

Additional Context

Current Implementation

Session title sourcing: Session titles in /resume are extracted directly from the first user prompt, truncated to 200 characters. No LLM-based summarization is performed.

• packages/core/src/services/sessionService.ts — SessionListItem.prompt stores the first user prompt text. extractFirstPromptFromRecords() scans the first N records of a JSONL session file for the first type === 'user' message.
• packages/cli/src/ui/hooks/useSessionPicker.ts — Renders the session picker dialog using SessionListItem data.
• packages/cli/src/ui/utils/sessionPickerUtils.ts — truncateText() truncates display text.

Existing summary command: /summary generates a project-level summary and saves it to .qwen/PROJECT_SUMMARY.md. This is unrelated to session titling.

• packages/cli/src/ui/commands/summaryCommand.ts — Uses getProjectSummaryPrompt() to ask the LLM for a project context summary. Not session-aware.

Proposed Implementation

1. Session title storage: Add a title field to the session JSONL metadata (or a sidecar .meta.json file). The SessionListItem interface would include an optional title field. When title is absent, fall back to the current first-prompt behavior.

2. Auto-title generation: Lazily trigger an LLM call to generate a short title once the conversation has accumulated enough context (e.g., after N messages or N tokens). This is not triggered at session start. Cache the result in the session metadata. This can be done asynchronously without blocking the conversation.

3. /rename command: Create packages/cli/src/ui/commands/renameCommand.ts following the pattern of existing commands (e.g., summaryCommand.ts). The command:

   • Calls the LLM to generate a title if no argument is provided.
   • Updates the session metadata file.
   • Refreshes the UI state to reflect the new title in the input area tag and session picker.

4. Input area topic tag: Add a SessionTopicTag component rendered in the top-right corner of the input area (above or adjacent to the prompt input). It displays the current session title as a small pill/tag when available, and is hidden when no title has been set.

Related Files