execute-prp

name	execute-prp
description	Execute a PRP implementation, starting at Phase 0 for complex multi-phase PRPs.
argument-hint	<prp-path>
disable-model-invocation	true

Execute PRP

PRP Path: $ARGUMENTS

Execute a PRP (Project Requirement Plan). Use this for:

• Simple PRPs (single file) - Complete execution
• Phased PRPs (folder) - Initial Phase 0 execution only

For continuing phased PRPs after Phase 0, use /continue-prp instead.

---

STEP 1: DETECT PRP TYPE

Check if $ARGUMENTS is:

• A file (e.g., context-engineering/PRPs/feature-name.md) → Simple PRP
• A folder (e.g., context-engineering/PRPs/FEATURE-NAME/) → Phased PRP

---

FOR SIMPLE PRPs (Single File)

1. Load PRP

• Read context-engineering/_STATUS.md to understand current project context
• Read the PRP file completely
• Understand all context and requirements
• Note the validation commands and acceptance criteria

2. Update Status Header

Update the PRP file's status header to reflect work has started:

**Status:** In Progress
**Feature Input:** {keep existing path}
**Last Updated:** {today's date}

If the PRP has no status header (older PRP), add one at the top of the file.

3. ULTRATHINK

• Plan your approach before coding
• Break down into tasks using TodoWrite tool
• Identify patterns from existing code to follow

4. Execute

• Implement the code following the PRP instructions
• Update TodoWrite as you complete tasks

5. Validate

• Run each validation command from the PRP
• Fix any failures
• Re-run until all pass

5.5 Guided Testing Walkthrough

If the PRP contains a "Test Cases" section:

1. Read the test cases section completely
2. Tell the user you're ready to walk them through testing:

   ========================================
   READY FOR GUIDED TESTING
   ========================================
   
   I'll walk you through {N} test cases.
   For each test, I'll:
   - Tell you what to do
   - Validate the result after your action
   - Mark pass/fail
   
   Let's start with TC-1: {title}
   ========================================
   

3. For each test case: a. Present the test case ID, title, and steps to the user b. Wait for user to perform the steps c. Run validation using the project's validation method (from project AGENTS.md) d. Compare results against expected outcomes e. Mark the test as passed or failed with detailed notes f. If failed → log to fixes, fix the issue, retest
4. Update the Test Execution Tracker in the PRP with results
5. Continue to next step only when all tests pass (or user explicitly skips)

6. Update Status Header to Complete

Update the PRP file's status header:

**Status:** Complete
**Feature Input:** {keep existing path}
**Last Updated:** {today's date}

7. Update Project Status

After successful implementation:

1. Read context-engineering/_STATUS.md
2. Move the feature from "In Progress" to "Recently Completed"
3. Update the entry with completion date

8. Archive Feature Input

Move the feature input document:

mv context-engineering/feature-inputs/in-progress/{feature-name}.md context-engineering/archive/feature-inputs/

Update the **Feature Input:** path in the PRP status header to reflect the archive location.

8.5. Update Knowledge Base & Project Docs

After archiving, run the full /update-knowledge-base process to:

1. Update Knowledge Base:

   • Extract key decisions, gotchas, patterns, and architecture from this PRP
   • Create or update topic files in appropriate sections (concepts, flows, implementations, gotchas, decisions)
   • Regenerate affected _SUMMARY.md files and knowledge-base/INDEX.md

2. Update Project Documentation:

   • Update AGENTS.md only if this work changed a durable, every-session fact: project structure, tech stack, a build/test/lint command, a new coding convention, an "always do X / never do Y" rule, or a high-level architecture/data-flow change. Litmus test: "Would a fresh agent need this in EVERY session, regardless of the task?" If no, do not touch AGENTS.md.
   • Do NOT write fix logs, bug-fix notes, phase-completion notes, changelogs, per-feature narratives, or transient status into AGENTS.md. Those belong in the PRP's own FIXES.md/COMPLETED.md and the knowledge base (gotchas/, decisions/, flows/, implementations/).

What to extract:

• Key decisions and their rationale
• Files created/modified and data flow patterns
• Gotchas discovered during implementation or fixes
• Data model changes (new tables, columns, functions)
• New code patterns or conventions established
• Module responsibility changes

For detailed instructions, see /update-knowledge-base.

9. Complete

• Verify all acceptance criteria are met
• Report completion status:

  ========================================
  PRP EXECUTION COMPLETE
  ========================================
  
  All tasks completed and validated.
  PRP status updated to: Complete
  Feature input archived to: context-engineering/archive/feature-inputs/
  Project _STATUS.md updated
  ========================================
  

---

FOR PHASED PRPs (Folder) - Phase 0 Only

This command starts Phase 0. For subsequent phases, use /continue-prp.

1. Load Context

Read in this order:

1. context-engineering/_STATUS.md - Current project status
2. {$ARGUMENTS}/_STATUS.md - Verify we're on Phase 0
3. {$ARGUMENTS}/OVERVIEW.md - Full feature context
4. {$ARGUMENTS}/phase-0-*/PLAN.md - Phase 0 tasks
5. {$ARGUMENTS}/phase-0-*/TEST-CASES.md - Phase 0 test cases (for guided testing after implementation)

2. Verify Starting Point

• Confirm status is "Not Started" for Phase 0
• If not Phase 0, tell user to use /continue-prp instead

3. Execute Phase 0 Tasks

For each task in PLAN.md:

1. Read the required files mentioned
2. Follow the code patterns provided
3. Implement the changes
4. Document in COMPLETED.md as you work

Use TodoWrite to track progress.

4. Validate

• Run validation commands from PLAN.md
• Fix any failures
• Verify acceptance criteria

4.5 Guided Testing Walkthrough

1. Read {phase}/TEST-CASES.md
2. Tell the user:

   ========================================
   READY FOR GUIDED TESTING
   ========================================
   
   I'll walk you through {N} test cases for Phase 0.
   For each test, I'll:
   - Tell you what to do
   - Validate the result after your action
   - Mark pass/fail
   
   Let's start with TC-A1: {title}
   ========================================
   

3. For each test case: a. Present the test case ID, title, and steps to the user b. Wait for user confirmation they performed the action c. Run validation using the project's validation method (from project AGENTS.md) d. Compare results against expected outcomes e. Mark passed or failed with detailed notes in the tracker f. If failed → ask user if they want to fix now or continue to next test
4. After all tests complete:
   • Update TEST-CASES.md Test Execution Tracker with all results
   • If all pass → proceed to "Update Status" step
   • If any fail → log failures to FIXES.md, fix, retest failed cases only

5. Update Status

1. Update _STATUS.md:

   **Status:** Awaiting Testing
   

2. Update Quick Status:

   - Phase 0: Awaiting Testing
   

6. Request Testing

If guided testing was already completed in Step 4.5 and all tests passed, skip to PHASE 0 COMPLETION.

Otherwise, tell user:

========================================
PHASE 0 TASKS COMPLETE
========================================

Status: Awaiting Testing

Please test the functionality and let me know:
- If it works → say "approved" and I'll complete the handoff
- If issues → describe the problem and I'll fix it

After this phase is approved, use:
/continue-prp {$ARGUMENTS}
========================================

---

HANDLING FIXES (Same Session)

If user reports issues while still in the same session:

1. Log the Issue

Add to phase-0-*/FIXES.md:

## Fix #1: {Issue Title}

**Reported:** {Date}
**Status:** Pending

**User Feedback:**
> {Exact quote from user}

2. Fix and Document

• Implement the fix
• Update FIXES.md with root cause, solution, code changes
• Mark as "Fixed"

3. Ask for Retest

Continue until user approves.

---

PHASE 0 COMPLETION

When user approves Phase 0:

1. Write Handoff

Fill in phase-0-*/HANDOFF.md with:

• Summary of what was built
• Key implementation details
• Decisions made
• Files added/modified
• Fixes applied
• Context for Phase 1

1.5. Update Knowledge Base & Project Docs

REQUIRED for EVERY phase (including Phase 0):

Run the full /update-knowledge-base process to preserve knowledge:

1. Update Knowledge Base:

   • Extract key decisions, gotchas, patterns, and architecture from this phase
   • Create or update topic files in appropriate sections
   • Regenerate affected _SUMMARY.md files and knowledge-base/INDEX.md

2. Update Project Documentation:

   • Update AGENTS.md only if this work changed a durable, every-session fact: project structure, tech stack, a build/test/lint command, a new coding convention, an "always do X / never do Y" rule, or a high-level architecture/data-flow change. Litmus test: "Would a fresh agent need this in EVERY session, regardless of the task?" If no, do not touch AGENTS.md.
   • Do NOT write fix logs, bug-fix notes, phase-completion notes, changelogs, per-feature narratives, or transient status into AGENTS.md. Those belong in the PRP's own FIXES.md/COMPLETED.md and the knowledge base (gotchas/, decisions/, flows/, implementations/).

Why every phase matters:

• Context may be lost between sessions
• Different agents may continue the work
• Gotchas discovered early should be captured immediately

Skip only if: Phase was purely bug fixes with no new patterns or decisions.

For detailed instructions, see /update-knowledge-base.

2. Update Status

Update _STATUS.md:

**Current Phase:** Phase 1 - {Phase Name}
**Status:** Not Started

## Quick Status
- Phase 0: Complete
- Phase 1: Not Started

3. Close Context

========================================
PHASE 0 COMPLETE
========================================

Handoff: phase-0-*/HANDOFF.md
Next: Phase 1 - {Name}

You can close this context.
To continue: /continue-prp {$ARGUMENTS}
========================================

---

SUMMARY

PRP Type	Command	Purpose
Simple (file)	/execute-prp	Complete execution
Phased (folder) - Phase 0	/execute-prp	Start Phase 0
Phased (folder) - Phase 1+	/continue-prp	Continue any phase

---

CRITICAL REMINDERS

1. Use /continue-prp for Phase 1+ - This command is for Phase 0 only
2. Document as you go - Update COMPLETED.md during implementation
3. Log all fixes - Every issue goes in FIXES.md
4. Write handoff - Critical for next session
5. Update KB & project docs - On EVERY phase/PRP completion
6. Use TodoWrite - Track your progress

---

SAFETY RULES

1. Follow Project Safety Rules

• Read the project's AGENTS.md for safety rules and coding standards
• Follow all environment-specific constraints (local vs production, etc.)

2. NO GIT COMMITS

• NEVER commit code to GitHub during implementation
• The user will handle all git operations manually
• Do NOT run git commit, git push, or similar commands

3. NO PRODUCTION DEPLOYMENTS

• Do NOT run any deployment commands