gps-denied-onboard/.cursor/skills/implement/SKILL.md

name, description, disable-model-invocation

name	description	disable-model-invocation
implement	Orchestrate task implementation with dependency-aware batching, parallel subagents, and integrated code review. Reads flat task files and _dependencies_table.md from TASKS_DIR, computes execution batches via topological sort, launches up to 4 implementer subagents in parallel, runs code-review skill after each batch, and loops until done. Use after /decompose has produced task files. Trigger phrases: - "implement", "start implementation", "implement tasks" - "run implementers", "execute tasks"	true

Implementation Orchestrator

Orchestrate the implementation of all tasks produced by the /decompose skill. This skill is a pure orchestrator — it does NOT write implementation code itself. It reads task specs, computes execution order, delegates to implementer subagents, validates results via the /code-review skill, and escalates issues.

The implementer agent is the specialist that writes all the code — it receives a task spec, analyzes the codebase, implements the feature, writes tests, and verifies acceptance criteria.

Core Principles

• Orchestrate, don't implement: this skill delegates all coding to implementer subagents
• Dependency-aware batching: tasks run only when all their dependencies are satisfied
• Max 4 parallel agents: never launch more than 4 implementer subagents simultaneously
• File isolation: no two parallel agents may write to the same file
• Integrated review: /code-review skill runs automatically after each batch
• Auto-start: batches launch immediately — no user confirmation before a batch
• Gate on failure: user confirmation is required only when code review returns FAIL
• Commit and push per batch: after each batch is confirmed, commit and push to remote

Context Resolution

• TASKS_DIR: _docs/02_tasks/
• Task files: all *.md files in TASKS_DIR (excluding files starting with _)
• Dependency table: TASKS_DIR/_dependencies_table.md

Prerequisite Checks (BLOCKING)

1. TASKS_DIR exists and contains at least one task file — STOP if missing
2. _dependencies_table.md exists — STOP if missing
3. At least one task is not yet completed — STOP if all done

Algorithm

1. Parse

• Read all task *.md files from TASKS_DIR (excluding files starting with _)
• Read _dependencies_table.md — parse into a dependency graph (DAG)
• Validate: no circular dependencies, all referenced dependencies exist

2. Detect Progress

• Scan the codebase to determine which tasks are already completed
• Match implemented code against task acceptance criteria
• Mark completed tasks as done in the DAG
• Report progress to user: "X of Y tasks completed"

3. Compute Next Batch

• Topological sort remaining tasks
• Select tasks whose dependencies are ALL satisfied (completed)
• If a ready task depends on any task currently being worked on in this batch, it must wait for the next batch
• Cap the batch at 4 parallel agents
• If the batch would exceed 20 total complexity points, suggest splitting and let the user decide

4. Assign File Ownership

For each task in the batch:

• Parse the task spec's Component field and Scope section
• Map the component to directories/files in the project
• Determine: files OWNED (exclusive write), files READ-ONLY (shared interfaces, types), files FORBIDDEN (other agents' owned files)
• If two tasks in the same batch would modify the same file, schedule them sequentially instead of in parallel

5. Launch Implementer Subagents

For each task in the batch, launch an implementer subagent with:

• Path to the task spec file
• List of files OWNED (exclusive write access)
• List of files READ-ONLY
• List of files FORBIDDEN

Launch all subagents immediately — no user confirmation.

6. Monitor

• Wait for all subagents to complete
• Collect structured status reports from each implementer
• If any implementer reports "Blocked", log the blocker and continue with others

7. Code Review

• Run /code-review skill on the batch's changed files + corresponding task specs
• The code-review skill produces a verdict: PASS, PASS_WITH_WARNINGS, or FAIL

8. Gate

• If verdict is FAIL: present findings to user (BLOCKING). User must confirm fixes or accept before proceeding.
• If verdict is PASS or PASS_WITH_WARNINGS: show findings as info, continue automatically.

9. Test

• Run the full test suite
• If failures: report to user with details

10. Commit and Push

• After user confirms the batch (explicitly for FAIL, implicitly for PASS/PASS_WITH_WARNINGS):
  • git add all changed files from the batch
  • git commit with a batch-level message summarizing what was implemented
  • git push to the remote branch

11. Loop

• Go back to step 2 until all tasks are done
• When all tasks are complete, report final summary

Batch Report

After each batch, produce a structured report:

# Batch Report

**Batch**: [N]
**Tasks**: [list]
**Date**: [YYYY-MM-DD]

## Task Results

| Task | Status | Files Modified | Tests | Issues |
|------|--------|---------------|-------|--------|
| [JIRA-ID]_[name] | Done | [count] files | [pass/fail] | [count or None] |

## Code Review Verdict: [PASS/FAIL/PASS_WITH_WARNINGS]

## Next Batch: [task list] or "All tasks complete"

Stop Conditions and Escalation

Situation	Action
Implementer fails same approach 3+ times	Stop it, escalate to user
Task blocked on external dependency (not in task list)	Report and skip
File ownership conflict unresolvable	ASK user
Test failures exceed 50% of suite after a batch	Stop and escalate
All tasks complete	Report final summary, suggest final commit
_dependencies_table.md missing	STOP — run /decompose first

Safety Rules

• Never launch tasks whose dependencies are not yet completed
• Never allow two parallel agents to write to the same file
• If a subagent fails, do NOT retry automatically — report and let user decide
• Always run tests after each batch completes