setup-worktree

name	setup-worktree
description	Create + link feature branch to issue, then check out worktree. Triggers: "setup worktree" | "create worktree" | "prepare workspace" | "bootstrap branch".

Setup Worktree

Success

I := branch ∃ on origin ∧ linked to issue (∃N) ∧ ω ∃ ∧ status "In Progress" (∃N) V := gh issue develop --list {N} | grep feat/<N>-<slug> ∧ git worktree list | grep "$WT_PATH"

Let: N := issue number (∅ if frame-only) slug := kebab-case title slug ω := worktree at .claude/worktrees/{N}-{slug} (∃N) ∨ .claude/worktrees/{slug} (¬N) β := base branch (staging if ∃ origin/staging, else main)

One-time setup per issue. Idempotent — safe to re-run if branch/link/ω already exist.

Entry

/setup-worktree --issue 42 --slug dark-mode    Create + link feat/42-dark-mode + ω for #42
/setup-worktree --slug spike-foo               Frame-only (no link, no issue)

Pipeline

Step	ID	Required	Verifies via	Notes
1	detect	✓	β, WORKTREE, REMOTE_BRANCH, LINKED	idempotent
2	branch + link	✓	branch on origin + linked to issue	gh issue develop (atomic create+link)
3	worktree + deps	✓	ω ∃ + deps installed	skip if exists
4	status	—	issue status updated	optional

Step 1 — Detect

BASE=$(. "${CLAUDE_SKILL_DIR}/../shared/lib.sh" && detect_base_branch)
git fetch origin "$BASE" 2>&1

# Paths depend on mode (issue vs frame-only)
if [ -n "$N" ]; then
  WT_PATH=".claude/worktrees/${N}-${slug}"
  BRANCH="feat/${N}-${slug}"
else
  WT_PATH=".claude/worktrees/${slug}"
  BRANCH="feat/${slug}"
fi

git worktree list | grep -qF "$WT_PATH" && WORKTREE=exists || WORKTREE=false
git ls-remote --heads origin "$BRANCH" 2>/dev/null | grep -q . && REMOTE_BRANCH=exists || REMOTE_BRANCH=false
if [ -n "$N" ]; then
  gh issue develop --list "$N" 2>/dev/null | grep -qF "$BRANCH" && LINKED=exists || LINKED=false
else
  LINKED=na
fi

Step 2 — Create + Link Branch on Origin

∃ N ∧ LINKED = false ∧ REMOTE_BRANCH = false → atomic create + link via gh issue develop:

gh issue develop "$N" --base "$BASE" --name "$BRANCH"

∃ N ∧ LINKED = false ∧ REMOTE_BRANCH = exists → branch pushed before /dev workflow. Cannot auto-link existing remote branches — the createLinkedBranch GraphQL mutation is create-only. Warn:

echo "WARN: $BRANCH on origin but not linked to #$N — attach manually via the issue's Development panel." >&2

¬N (frame-only) ∧ REMOTE_BRANCH = false → push base SHA to new branch on origin (no link, no issue):

git push origin "${BASE}:refs/heads/${BRANCH}"

Why gh issue develop: the underlying createLinkedBranch GraphQL mutation only creates new branches. If the branch already exists on origin, the mutation returns linkedBranch: null silently. So linking has to happen at branch-creation time — never after the fact.

Step 3 — Worktree + Install

WORKTREE = false → fetch the now-existing remote branch + add worktree from it:

git fetch origin "$BRANCH"
git worktree add "$WT_PATH" "$BRANCH"

WORKTREE = exists → skip (worktree already checked out).

Enter + install:

EnterWorktree(path: "$WT_PATH")

cp .env.example .env 2>/dev/null; {package_manager} install

Step 4 — Issue Status (optional)

∃ N →

bun ${CLAUDE_PLUGIN_ROOT}/skills/issue-triage/triage.ts set "$N" --status "In Progress"

Exit

• Success: branch on origin + link (∃N) + ω ∃. Return silently.
• Idempotent re-run: all detect flags exist → skip → return silently.
• Failure: propagate gh issue develop errors (do not swallow — caller decides).
• Migration edge (remote branch pre-existed): warn on stderr, continue with worktree; user links manually via UI.

Chain Position

• Phase: Frame (pre-step)
• Predecessor: /issue-triage
• Successor: /frame
• Class: adv (continuous flow, no gate)

Task Integration

• /dev owns the dev-pipeline task lifecycle externally
• This skill does NOT update its own dev-pipeline task
• Sub-tasks created: none

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