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Daniel Kim
5228228b2d
* Auto-generate chat session titles from the first message
Chat sessions were titled with a 64-char truncation of the first user
message. Now the first message also kicks off a short-lived headless
harness child that names the session, in parallel with the turn.
- store: new chat_sessions.title_source column ('fallback' / 'generated'
/ 'user'; NULL on legacy rows) via the best-effort ALTER pattern.
set_chat_session_title takes a source; set_chat_session_title_if_empty
becomes set_chat_session_title_if_placeholder — one conditional UPDATE
that lets a generated title replace the placeholder while a user
Rename, a legacy title, and an already-generated title all stand.
- harness: defaulted Harness::generate_title, implemented for Claude
(claude -p --model haiku --max-turns 1) and Codex (codex exec --json
at low reasoning effort). Both children run tool-less and MCP-less,
hermetically in a temp cwd, under a shared TITLE_TIMEOUT. Prompt and
output sanitizer live in the new harness/title.rs so both halves are
unit-testable; opencode and cursor keep the default.
- opencode fix: TurnCtx::set_title's if-empty check could never fire —
the placeholder write always beat it — so native opencode titles were
silently dropped. The provenance check revives them, and the seed
title opencode stamps on every new session ("New session - <ts>") is
now skipped so it can't latch and block the real one.
- chat: one emit_session helper for the re-read/resolve-busy/broadcast
sequence shared by set_archived, set_title and auto-titling; the
placeholder now takes the first non-empty line.
No UI changes: the existing chat.session SSE upsert re-renders Recents.
* Animate the reveal of auto-generated session titles
An auto-title used to pop into the sidebar with no acknowledgement that
anything happened. Now it materializes character by character.
- session_json gains "titleSource" so the UI can tell a harness-generated
title from a placeholder or a user rename.
- New TitleReveal component, used by both the Recents row and the chat
header so the effect is identical in each. Characters are aria-hidden
behind an aria-label — a screen reader hears one title, not forty
single-letter spans — and render as a plain string when not animating.
- The reveal plays only on a live chat.session event that changes a title
we already had on screen, and only for titleSource "generated": renames
and page loads swap silently. A per-session nonce remounts the spans so
a second retitle replays rather than sitting on a finished animation.
- CSS: 240ms per character, 14ms stagger capped at 500ms, fading in from
blurred and slightly below. No color, no scale, no layout shift, and
@media (prefers-reduced-motion: reduce) turns it off entirely.
* Trim the skills catalog from codex title requests
The plugin/skills catalog injected ~6k prompt tokens (24.3k -> 18k input
measured) into a one-line title request that ignores it.
* Strip the agent system prompt from claude title requests
--system-prompt replaces the ~8.5k-token Claude Code scaffolding with one
sentence (measured 8.5k -> 1.9k input tokens; wall time unchanged at ~3s,
which is node boot + one API round trip).