Ccc Spawn

/ccc-spawn — Spawn Hub

Spin work off into its own session on demand — the manual counterpart to the automatic isolation-spawn nudge (suggest-ticker). One click-first entry point that routes to the right spawn mechanism for what you're doing, and for the surface you're on.

Surface-aware. In Claude Cowork Desktop, spawning a one-off session is a spawn_task sidebar chip. In the Claude Code CLI, it's a /spawn peer via the claude-peers broker. This skill picks the right one automatically — you don't have to know which surface you're on.

When you'd reach for it

• "This is a separate, self-contained thing — do it in its own session so it doesn't derail here."
• "Fan this out across N files in parallel."
• "Run spec → build → review as a chain of hand-off sessions."
• "Get a fresh, independent expert pass on this."

How it routes

On /ccc-spawn with no argument, open a click-first picker:

AskUserQuestion:
  question: "What do you want to spawn?"
  options:
    - Isolated session — one self-contained task, its own fresh context
    - Parallel fleet — fan out across independent files/units at once
    - Cross-session relay — chain spec → build → review as hand-off sessions
    - Expert pass — one independent reviewer (security / perf / design / …)

Explicit sub-commands skip the picker: /ccc-spawn isolated <task>, /ccc-spawn fleet, /ccc-spawn relay, /ccc-spawn expert <domain>, /ccc-spawn status.

The brief a spawned session gets

Every spawn carries a self-contained contract (Pillar 8), because a peer/session does NOT share your context:

• Objective + acceptance criteria — what DONE looks like, checkably.
• Scope + file domains — exact paths it owns; non-overlapping with anything else in flight.
• Hard constraints — worktree-isolated, relative paths only, don't touch X, don't merge without a human GO (Pillar 5).
• Report format — so the result is parseable when it comes back.

/ccc-spawn status lists active peers/sessions (CLI: list_peers; Cowork: the task chips you've started) and any pending hand-offs.

Safety (Pillar 5)

• Each spawned code-writing session gets its own git worktree; first act is verifying git rev-parse --show-toplevel matches — abort if not.
• Merge / deploy / delete are never auto — they require an explicit human GO, every time.
• Nothing spawns without your confirmation — this hub offers; it doesn't fire on its own.
• Cap the fan-out: don't over-parallelize (1 independent unit = 1 spawn; a small pilot before a big fan-out).

When NOT to use

• The work is trivial or belongs in the current thread — spawning has real overhead.
• You just want the automatic nudge — that already runs every turn via suggest-ticker (this skill is the on-demand version).
• Two spawns would edit the same files — merge them into one, or sequence them.

Limitations

• CLI /spawn needs the claude-peers broker; Cowork spawn_task needs the Desktop sidebar — the skill uses whichever the current surface provides.
• Spawned sessions are independent: they inherit no in-flight uncommitted state, so the brief must carry everything they need.

⚙️ Fable contract: plan before build · verifier ≠ worker · prove before alarm · loops need gates · leave durable state — rules/fable-method.md