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name: swarm-workspace description: > Foundation for swarm coding workflows: the two-tier filesystem contract (a shared coordination git repo + fast per-subagent git worktrees) and the canonical setup-local.sh that spins up a worktree. Use its setup-local.sh whenever a swarm subagent needs an isolated, fast local checkout of the shared repo to edit and build in.

Swarm Workspace

Owns the per-subagent git-worktree lifecycle over a two-tier filesystem, so swarm subagents can edit and build in parallel without colliding.

Two-tier filesystem

Path	Role	Rules
/mnt/agents/output/app	Shared coordination repo. A plain git repo (no remote). The branch-creation / merge hub.	Do NOT build or edit code here.
$HOME/app-<branch>	Local worktree. Fast filesystem where a subagent edits and builds.	Each subagent uses a unique path.

Key facts that follow from this layout:

• No remote, no push. All worktrees share the shared repo's .git object store, so a commit on any branch is immediately visible to the main agent — it just git merge <branch> from inside the shared repo. There is no git push.
• node_modules, dist, and .env are gitignored. They never sync via git, so git worktree add does NOT carry them into a new worktree. Each worktree gets its own copy — that is why setup-local.sh copies node_modules (and optionally .env) in.
• Never run git worktree prune. Every agent's worktree metadata lives in the shared repo's .git/worktrees/ directory; pruning destroys peers' worktrees.
• Each parallel subagent MUST pass a unique $HOME/app-<branch> path — a collision corrupts shared worktree metadata.

setup-local.sh — per-subagent worktree setup

[REPO_PATH=<shared-repo>] [NODE_MODULES_SRC=<prebuilt-node_modules>] [ENV_SRC=<.env-file>] \
  bash /app/.agents/skills/swarm-workspace/scripts/setup-local.sh <branch> <local-path>

Var	Meaning	Default
REPO_PATH	shared coordination repo	/mnt/agents/output/app
NODE_MODULES_SRC	a prebuilt node_modules dir copied into the worktree for a fast start	unset → rely on npm install
ENV_SRC	a .env file copied into the worktree	unset → $REPO_PATH/.env (the graft's staged .env), so backend/db/build worktrees auto-inherit DATABASE_URL; no-op when that file is absent (frontend-only)

Pass NODE_MODULES_SRC pointing at the prebuilt node_modules for your stack (e.g. …/scripts/template/node_modules) so the worktree starts with the right dependencies overlaid; npm install then reconciles anything else.

Behavior:

• Fresh: git worktree add --force, copy NODE_MODULES_SRC (+ .env if ENV_SRC set), then npm install.
• Re-entry on the same branch: reuse the worktree, skip npm install, still refresh .env if ENV_SRC is given.
• Re-entry on a different branch / stale dir: recreate cleanly.
• --force tolerates stale worktree entries left by dead sandboxes.

Prerequisite

setup-local.sh assumes the shared coordination repo already exists at REPO_PATH. Creating it (laying down the initial project and git clone-ing it there) is the job of whatever workflow lays the first template — not this skill.