execute-task

name	execute-task
description	Execute the next available implementation task from a PRD task folder. Use when Codex is asked to implement, execute, start, continue, or complete a task using tasks/prd-[feature-name]/prd.md, techspec.md, tasks.md, and individual task files, then mark the task complete after verification.

Execute Task

Use this skill to identify the next available task, prepare the context, implement it, verify it, and mark it complete.

Required Workflow

1. Identify the task.

   • Locate the relevant feature folder under tasks/prd-[feature-name]/.
   • Read tasks.md and identify the next incomplete main task or the task explicitly requested by the user.
   • Read the matching individual task file, such as 1_task.md.

2. Load task context.

   • Read prd.md, techspec.md, tasks.md, and the selected task file.
   • Review dependencies on previous tasks and confirm whether prerequisite tasks are complete.
   • Read applicable project rules under .codex/rules/.
   • Identify and load applicable project skills under .codex/skills/ based on the technologies and work involved.

3. Research technical dependencies.

   • Use Context7 MCP for documentation about involved languages, frameworks, libraries, APIs, and patterns when applicable.
   • Prefer official documentation and existing project patterns.

4. Produce the required pre-implementation summary.

   • Use references/task-summary-template.md.
   • Include task ID, task name, PRD context, Tech Spec requirements, dependencies, objectives, and risks.

5. Produce the approach plan.

   • Use references/approach-plan-template.md.
   • Keep the plan concrete and ordered.
   • Do not skip this step.

6. Implement the task.

   • Start implementation immediately after the summary and approach plan.
   • Follow the selected task file, Tech Spec, PRD, and project rules.
   • Keep changes scoped to the selected task.
   • Do not implement unrelated tasks or opportunistic refactors.

7. Verify the task.

   • Run the relevant unit, integration, E2E, lint, typecheck, or build commands required by the task and project standards.
   • If a required command cannot run, explain why and record the residual risk.

8. Mark completion.

   • After implementation and verification, mark the completed task in tasks.md.
   • Update the individual task file if its checklist tracks completed subtasks.
   • Report changed files, verification results, and any follow-up risks.

Hard Rules

• Do not skip reading the PRD, Tech Spec, tasks summary, and selected task file.
• Do not skip the task summary.
• Do not skip the approach plan.
• Start implementation after completing the required setup, summary, and plan.
• Use Context7 MCP for relevant technical documentation when the task involves frameworks, libraries, or APIs.
• Mark the task complete in tasks.md only after implementation and verification.

Quality Checklist

• Next task or user-requested task was identified.
• PRD, Tech Spec, tasks.md, and task file were reviewed.
• Applicable .codex/rules/ and .codex/skills/ entries were checked.
• Relevant Context7 documentation was consulted when applicable.
• Task summary and approach plan were produced.
• Implementation was completed.
• Relevant verification commands were run or documented as blocked.
• Completed task was marked in tasks.md.