skill-z3-implementation

# Z3 Implementation Skill Thin wrapper that delegates Z3 implementation to `z3-implementation-agent` subagent. ## Trigger Conditions This skill activates when: - Task language is "z3" - /implement command targets a Z3 task - Plan exists and task is ready for implementation ## Execution Flow ### Stage 1: Input Validation Validate task_number exists and language is "z3". ### Stage 2: Preflight Status Update Update status to "implementing" BEFORE invoking subagent. ### Stage 3: Prepare Delegation Context Include task_context, plan_path, metadata_file_path. ### Stage 4: Invoke Subagent Use Task tool with subagent_type: "z3-implementation-agent". ### Stage 5: Parse Subagent Return Read metadata from `specs/{N}_{SLUG}/.return-meta.json`. ### Stage 6: Update Task Status (Postflight) Update state.json and TODO.md based on result. ### Stage 7: Link Artifacts Add artifact to state.json with summary. ### Stage 8: Git Commit Commit changes with session ID. ### Stage 9: Return Brief Summary ## Return Format Brief text summary (NOT JSON).