Claude Command Center v3.0.0

CCC's first release since the OSS launch — and a big one. Multi-engine
spawning, multi-repo navigation, a real history search, side-by-side
conversations, an in-UI terminal, and a launchd service install. Plus
performance work that cuts the cold scan on large repos from ~135s to
~6.6s, and the breaking API change that finally retires process-global
repo state.

Highlights

Multi-engine spawning — Claude is no longer the only engine. The
spawn picker now offers Codex (codex exec) and Gemini CLI
alongside Claude. Codex spawns are fire-and-watch (no resume), Gemini
gets full discovery / transcript viewing / token usage / spawn / resume
parity with Claude, and both surface as first-class kanban cards with
their own engine chip and tinted row.

Multi-repo, finally — A vertical repo sidebar on the left edge
shows one icon per known repo (running CCC servers up top, switchable
repos below). The topbar repo picker lists peer CCC servers in a
"Running" section so you can hop between them without spawning. An
"All repos" sidebar view aggregates every conversation across every
folder you've ever Claude-Code'd in, GitHub issues from every repo
flow into the issues section in one list, and you can drag a session
row onto another repo's group header to pin it cross-repo.

Search every conversation you've ever had — A new 🔎 History button
(shortcut /) opens a BM25-keyword search drawer over your
~/.claude-index/index.db. Multi-word queries auto-OR-rewrite so a
single missing word doesn't zero the result set; explicit FTS5 syntax
still works. The same index now augments the sidebar search box inline
— typing fires a 180ms-debounced background query that surfaces
matching sessions from other repos as synthetic "history" rows.

Side-by-side conversations — Drag any session row onto the right or
bottom edge of the open conversation to split the pane. Each pane has
its own composer, send button, and SSE stream. Click × to close.
Below 900px the split collapses to single-pane. (As shipped today, the
drop event finally fires — it had a one-word dropEffect bug since
2026-04-27 that quietly cancelled every drop. See the Fixed section.)

In-UI terminal — A new ⌨ Terminal button (Cmd/Ctrl+\``) opens a one-shot terminal at the bottom of the page. cdis parsed server-side so cwd survives between commands; the path is clamped to the selected repo. Cancel kills the whole process group, so a runawaymake -jdoesn't leave orphans. Not a real PTY —vim/topwill hang. **This is the most security-sensitive surface in CCC**: do **not** run withCCC_BIND_HOST=0.0.0.0` on an untrusted network.

Worktree-per-spawn — A 🌿 worktree toggle next to the new-session
input launches the session in a fresh git worktree on a feat/<slug>
branch, isolated from main. Available in the kanban modal, the inline
list-view spawn bar, and via worktree: true on POST /api/sessions/spawn. The Worktrees modal now also surfaces open PRs
without a worktree, and tags worktree rows with their PR badge.

Cost & PR visibility on every card — Sessions show a $0.34 cost
chip in the input strip (Anthropic list-price equivalent, hover for
per-category breakdown), and a state-aware ↗/✓/× PR #N chip in the
kanban signal slot. PR state cache busts immediately when CCC's own
merge button runs, with a 60s ceiling for web-UI merges.

Breaking changes

/api/repo/switch no longer mutates server state. The endpoint
returns 410 Gone for validated paths. Process-global repo state has
been retired — every repo-scoped endpoint now requires explicit
repo_path, cwd, or a session-derived context.

Migration:

• API clients that called /api/repo/switch to "set the active repo"
  must pass repo_path (or a session id whose cwd resolves to a repo)
  on every repo-scoped call instead.
• CCC_WATCH_REPO is ignored.
• The UI repo picker now performs a one-off, per-call switch on the
  active server rather than persisting state — this is the new
  intended behavior and matches the API.

See commit 67b3f7d for the full surface change.

Notable fixes

• Drag-to-split conversation pane has never worked. The drop
  overlay set dropEffect = 'copy' on dragover, but every drag source
  set effectAllowed = 'move' on dragstart. Per HTML5 DnD spec the
  browser silently cancels mismatched effect drops, so the drop
  event literally never fired. One-word fix; nine-day delay (a332249).

• /api/conversations cold scan: ~135s → ~6.6s on large repos.
  Hoisted the per-row git rev-parse cache out of the loop, persisted
  _conv_meta_cache to disk across restarts, added a 30-day activity
  filter (override with ?include_old=1 or
  CCC_MAX_CONV_AGE_DAYS), and added a concurrency guard so the
  10s browser poll can't pile up duplicate cold scans.

• Archived sessions now actually get killed. _kill_session_by_id
  was looking up the wrong field name (session_id vs Claude's
  sessionId) and only signaling the first matched PID, so headless
  agents survived archive. Now signals every PID associated with the
  session id, and ps-validates each before signaling so recycled
  PIDs can't take out unrelated processes.

• Idle-session reaper. A background thread SIGTERMs any claude
  session whose JSONL has had no user/assistant/result event in 24h.
  Activity is measured via last_meaningful_ts, so /rename and
  long-running agents that are still emitting messages don't count
  as idle.

• Conv-pane sticky header tracks the current scrolled-past message
  and auto-sizes to fit it, instead of pinning the first user message
  at a manually-resizable height.

• Title-summarizer / morning-braindump JSONLs no longer pollute the
  project conversation store. Both throwaway claude -p callers
  are pinned to a stable scratch cwd; the store self-GCs after 7 days
  (override with CCC_SCRATCH_GC_DAYS).

Install / upgrade

git pull
./run.sh                      # try it (foreground)
./run.sh --install-service    # keep it (launchd, starts at login)

Existing service installs: re-run ./run.sh --install-service to
update the plist with the new version. Logs at
~/.claude/command-center/logs/service.{out,err}.log.

The full bullet list is in CHANGELOG.md.