Development Using Claude Code or Codex · Part 5
Part 5: Task Implementation Skill
April 11, 2026 · 1 min read
ImplementationTestingDelivery
Implementation quality improves dramatically when the agent is forced to stay on one scoped task.
Skill for This Post: task-implementation
Create .ai/skills/task-implementation/SKILL.md:
---
name: task-implementation
description: Implement a single planned task with minimal scope drift, verification, and completion notes.
---
# Task Implementation
## Inputs
- task id
- task scope
- done criteria
- dependencies already completed
## Rules
- Work on ONE task only.
- Do not expand scope unless user approves.
- Write or update tests for changed behavior.
- Run relevant verification before declaring done.
## Required Output
1) files changed
2) behavior implemented
3) tests added/updated
4) verification results
5) known limitationsPrompt Pattern
Run task-implementation for TASK-003 only.
Do not start any other task.
Show file diff summary, tests, and verification output.Why This Skill Matters
- Reduces scope creep
- Keeps PRs reviewable
- Produces repeatable, auditable implementation notes
Cross-Agent Install
ln -sfn "$PWD/.ai/skills/task-implementation" ~/.claude/skills/task-implementation
ln -sfn "$PWD/.ai/skills/task-implementation" ~/.codex/skills/task-implementationNext
Part 6 applies a dedicated code-review gate skill to catch defects before QA.