A live slash-completion dropdown renders above the composer as you type `/…`
(spec §1 autocomplete) — the 6th and final first-class overlay surface.
- view/composer.tsx: onContentChange → onType (reads ta.plainText); a dropdown
of candidates (display + meta) renders above the textarea when completions are
set. The textarea owns key input (live refine-by-typing), so Tab accepts the
top match (ta.clear()+insertText) and Esc dismisses; arrow-nav would fight the
cursor (noted polish).
- store: completions state + setCompletions/clearCompletions; CompletionItem.
- logic/slash.ts: mapCompletions(complete.slash result) → candidates.
- entry: onType queries complete.slash for `/word` (no space) and sets/clears the
store completions; cleared on submit / non-slash / space.
Verified: bun run check green (49 tests / 7 files) — mapCompletions + a
composer-dropdown frame test. LIVE tmux: typing `/comp` showed /compress,
/composio, /compact (with descriptions); Tab accepted the top + cleared the
dropdown. ALL 6 first-class overlays are now ✅+tested+smoked (blocking prompts,
pager, session switcher, model picker, skills hub, completions). Smoke P5a +
matrix updated. Remaining: chrome (5b), agent features (5d), agents dashboard (5e).
alt-glitch
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