v1.56.1

What's Changed

• Hardened the worktree-check guard for missing session IDs and Codex-style command payloads.
• Switched worktree git probes to argv-based git rev-parse calls.
• Bumped @slope-dev/slope and the bundled Codex plugin to 1.56.1.

Validation

• pnpm build
• pnpm typecheck
• pnpm vitest run tests/cli/guards/worktree-check.test.ts tests/cli/guards/stop-check.test.ts
• pnpm test
• npm pack --dry-run
• node dist/cli/index.js validate --skills
• node dist/cli/index.js roadmap validate
• node dist/cli/index.js map --check