implementing-specificationslisted

# Implementing Specifications ## Overview This is the shared-skill replacement for the legacy Claude Code `/spec:execute` workflow. Use it when a specification is already validated and the next job is disciplined implementation. ## Read First Before acting, read: - `.claude/skills/executing-specs/SKILL.md` Load supporting files from `.claude/skills/executing-specs/` only on demand. ## Core Workflow 1. **Validate inputs** - confirm the specification exists - identify the feature slug - confirm task decomposition exists 2. **Choose a workspace** - if `git rev-parse --git-dir --git-common-dir` prints two different paths, the session is already in a secondary worktree — proceed in place - otherwise, when the checkout is shared with other active work (dirty tree, unrelated branch, another agent or session), offer an isolated git worktree before changing code - in this repo: `/worktree:create spec-<slug>` provisions dependencies and ports, and the EnterWorktree tool switches the session into it; where those are unavailable, plain `git worktree add` preserves the same discipline - record the worktree path in the implementation tracking file so completion can offer cleanup 3. **Scaffold or resume implementation tracking** - create or update `04-implementation.md` - persist progress incrementally, not only at the end 4. **Review the execution plan** - determine completed, in-progress, and pending work - identify dependency-aware batches or a s