{
  "issueNumber": 270,
  "branchName": "fix/270-idempotent-worktree",
  "generatedAt": "2026-04-03T12:00:00Z",
  "stories": [
    {
      "id": "S1",
      "title": "Implement idempotent createWorktree() logic with isValidWorktree helper and three-path branching",
      "priority": 1,
      "dependsOn": [],
      "acceptanceCriteria": [
        "isValidWorktree() helper checks git worktree list for the given path",
        "Valid existing worktree is reused with fetch+reset instead of removal",
        "Invalid/corrupted worktree directory is removed and falls through to branch-check",
        "Existing local branch without worktree uses git worktree add <path> <branch> (no -b)",
        "Fresh start (no worktree, no branch) uses git worktree add -b <branch> <path> origin/master",
        "git branch -D block (old lines 100-118) is completely removed",
        "git fetch origin errors in reuse path are surfaced, not swallowed"
      ],
      "passes": false,
      "completedAt": null
    },
    {
      "id": "S2",
      "title": "Add unit tests for all four idempotent paths and update existing tests",
      "priority": 2,
      "dependsOn": [
        "S1"
      ],
      "acceptanceCriteria": [
        "Test: worktree exists and is valid → reused without removal",
        "Test: worktree exists but is invalid → removed, falls through to branch-check",
        "Test: branch exists locally, no worktree → git worktree add without -b",
        "Test: neither exists → fresh git worktree add -b (existing behavior)",
        "Existing tests updated to remove assertions on git branch -D behavior",
        "npm run test passes with zero failures",
        "npm run lint passes with zero warnings"
      ],
      "passes": false,
      "completedAt": null
    }
  ]
}