Pipeline Plan 191

Plan is ready for review. Here's the summary:

Scope: Single file change to scripts/sw-daemon-test.sh

What it does:

1. Adds test_setup_dirs_self_healing_worktree — extracts the real setup_dirs() from sw-daemon.sh, runs it in a controlled temp directory with no .claude/worktrees/ present, then asserts the directory gets created and .gitignore gets updated
2. Registers the test in the existing tests=() array

Why this approach:

• Tests the real production function (not a redefinition) — catches actual regressions
• Uses sed extraction + subshell isolation — safe, no side effects on test env
• Follows existing test harness patterns (PASS/FAIL, assertion helpers, run_test)