AgentSkillsCN

piv

轻量级 PIV 工作流——以探索驱动为导向的功能构建工具。无需编写 PRD。快速提问,生成 PRP,再配合验证循环完成开发。适用于中小型功能开发,尤其适合您希望跳过 PRD 流程时使用。

SKILL.md
--- frontmatter
name: piv
description: PIV workflow orchestrator - Plan, Implement, Validate loop for systematic multi-phase software development. Use when building features phase-by-phase with PRPs, running automated validation, or orchestrating multi-agent development workflows. Triggers on: PIV, PRP, PRD, plan-implement-validate, multi-phase development, orchestrate workflow.
disable-model-invocation: true
allowed-tools: Task, TaskCreate, TaskUpdate, TaskList, Read, Write, Bash, Glob, Grep
argument-hint: "[PRD_PATH|PROJECT_PATH] [START_PHASE] [END_PHASE]"

PIV Ralph Orchestrator

Arguments: $ARGUMENTS

Parse arguments using this logic:

PRD Path Mode (first argument ends with .md)

If the first argument ends with .md, it's a direct path to a PRD file:

  • PRD_PATH - Direct path to the PRD file
  • PROJECT_PATH - Derived by going up from PRDs/ folder
  • START_PHASE - Second argument (default: 1)
  • END_PHASE - Third argument (default: auto-detect from PRD)

Project Path Mode

If the first argument does NOT end with .md:

  • PROJECT_PATH - Absolute path to project (default: current working directory)
  • START_PHASE - Second argument (default: 1)
  • END_PHASE - Third argument (default: 4)
  • PRD_PATH - Auto-discover from PROJECT_PATH/PRDs/ folder

Detection Logic

code
If $ARGUMENTS[0] ends with ".md":
  PRD_PATH = $ARGUMENTS[0]
  PROJECT_PATH = dirname(dirname(PRD_PATH))
  START_PHASE = $ARGUMENTS[1] or 1
  END_PHASE = $ARGUMENTS[2] or auto-detect from PRD
  PRD_NAME = basename without extension
Else:
  PROJECT_PATH = $ARGUMENTS[0] or current working directory
  START_PHASE = $ARGUMENTS[1] or 1
  END_PHASE = $ARGUMENTS[2] or 4
  PRD_PATH = auto-discover from PROJECT_PATH/PRDs/
  PRD_NAME = discovered PRD basename

Auto-Detect Phases from PRD

When PRD_PATH is specified, scan the PRD for phase sections:

  1. Look for: ## Phase N:, ### Phase N:, **Phase N:**, Phase N:
  2. Set END_PHASE to highest phase found (if not specified)

Required Reading by Role

CRITICAL: Each role MUST read their instruction files before acting.

RoleInstructions
PRD Creation (if needed)Read references/create-prd.md
Orchestrator (PRP Generation)Read references/generate-prp.md
ExecutorUse the piv-executor agent + Read references/execute-prp.md
ValidatorUse the piv-validator agent
DebuggerUse the piv-debugger agent

DO NOT wing it. Follow the established processes.

Prerequisite: A PRD must exist before running PIV Ralph. If no PRD exists, tell the user to create one first.


Orchestrator Philosophy

"Context budget: ~15% orchestrator, 100% fresh per subagent"

You are the orchestrator. You stay lean and manage workflow. You DO NOT execute PRPs yourself - you spawn specialized sub-agents with fresh context for each task.

Sub-Agent Types:

  • Executor (piv-executor) - Implements PRP requirements
  • Validator (piv-validator) - Independently verifies implementation
  • Debugger (piv-debugger) - Fixes specific gaps

Phase Workflow

For each phase from START_PHASE to END_PHASE:

Step 1: Check/Generate PRP

Step 1a: Check for existing PRP

bash
ls -la PROJECT_PATH/PRPs/ 2>/dev/null | grep -i "phase.*N\|pN\|p-N"

If a PRP already exists for this phase, skip to Step 2.

Step 1b: Spawn Fresh Research Agent for PRP Generation

CRITICAL: Do NOT generate the PRP yourself. Spawn a FRESH sub-agent with clean context that performs codebase analysis AND PRP generation in sequence.

Before spawning, the orchestrator must:

  1. Read the PRD at PRD_PATH
  2. Find the Phase N section
  3. Extract the phase scope (title, deliverables, validation criteria)
  4. Pass this extracted scope to the fresh agent

Spawn a general-purpose sub-agent with this prompt:

code
RESEARCH & PRP GENERATION MISSION - Phase {N}
==============================================

You are generating a PRP for Phase {N}. You have fresh context — use it wisely.

Project root: {PROJECT_PATH}
PRD Path: {PRD_PATH}

## Phase {N} Scope (from PRD)
{paste phase title, deliverables, and validation criteria}

## Step 1: Codebase Analysis
Read and follow the codebase analysis process doc.
Run deep codebase analysis for: {phase feature description}
Save analysis to: {PROJECT_PATH}/PRPs/planning/{PRD_NAME}-phase-{N}-analysis.md

## Step 2: Generate PRP (analysis context still loaded)
Read and follow the PRP generation process doc.
You already have the codebase analysis in your context — use it directly.
DO NOT spawn a sub-agent for this. You do it yourself.
Output PRP to: {PROJECT_PATH}/PRPs/PRP-{PRD_NAME}-phase-{N}.md

## Critical Rules
- Do BOTH steps yourself in sequence
- Your analysis context feeds directly into PRP quality
- Follow the full generate-prp process (template, quality gates, info density)
- The PRP template is at: PRPs/templates/prp_base.md
- DO NOT spawn sub-agents for either step

Wait for the research agent to complete before proceeding.

Step 2: Spawn EXECUTOR Sub-Agent

Use the Task tool with subagent_type: "piv-executor":

code
EXECUTOR MISSION - Phase {N}
============================

PRP Path: {PRP_PATH}
Project: {PROJECT_PATH}

Read the PRP execution process doc at references/execute-prp.md, then execute the PRP.
Follow: Load PRP → ULTRATHINK → Execute → Validate → Verify
Output EXECUTION SUMMARY with Status, Files, Tests, Issues.

Wait for executor to complete.

Step 3: Spawn VALIDATOR Sub-Agent

Use the Task tool with subagent_type: "piv-validator":

code
VALIDATOR MISSION - Phase {N}
=============================

PRP Path: {PRP_PATH}
Project: {PROJECT_PATH}
Executor Summary: {SUMMARY}

Verify ALL requirements independently. Don't trust executor claims.
Output VERIFICATION REPORT with Grade, Checks, Gaps.

Process validator result:

  • PASS → Proceed to Step 5 (commit)
  • GAPS_FOUND → Proceed to Step 4 (debugger)
  • HUMAN_NEEDED → Ask user for guidance

Step 4: Debug Loop (Max 3 iterations)

If validator found gaps, spawn debugger sub-agent using subagent_type: "piv-debugger":

code
DEBUGGER MISSION - Phase {N} - Iteration {I}
============================================

Project: {PROJECT_PATH}
PRP Path: {PRP_PATH}
Gaps: {GAPS}
Errors: {ERRORS}

Fix root causes, not symptoms. Run tests after each fix.
Output FIX REPORT with Status, Fixes Applied, Test Results.

After debugger completes:

  • Re-spawn validator to verify fixes
  • If PASS → proceed to commit
  • If GAPS_FOUND again → spawn debugger (up to 3 total iterations)
  • After 3 iterations → escalate to user

Step 5: Smart Commit (Orchestrator does this)

After validation passes:

bash
cd PROJECT_PATH
git status
git diff --stat

Create semantic commit:

  • Format: feat/fix/refactor(scope): description
  • Add: Co-Authored-By: Claude <noreply@anthropic.com>

Step 6: Update Progress

Update PROJECT_PATH/WORKFLOW.md:

  • Mark phase N as complete
  • Note validation results
  • Record any issues or observations

Step 7: Next Phase

Increment phase counter. If more phases remain, loop back to Step 1.


Error Handling

No PRD Found

If no PRD exists in PROJECT_PATH/PRDs/:

  • Tell user: "No PRD found. Please create one first, then re-run PIV."

Executor Returns BLOCKED

Ask user: "Executor blocked on phase N. Issue: [description]. How should we proceed?"

Validator Returns HUMAN_NEEDED

Ask user: "Validator needs guidance on phase N. Question: [details]. Please advise."

3 Debug Cycles Exhausted

Ask user: "Phase N failed validation after 3 fix attempts. Persistent issues: [list]. Need your guidance."


Completion

When all phases are complete, output:

code
## PIV RALPH COMPLETE

Phases Completed: START to END
Total Commits: N
Validation Cycles: M

### Phase Summary:
- Phase 1: [feature] - validated in N cycles
- Phase 2: [feature] - validated in N cycles
...

All phases successfully implemented and validated.

Visual Workflow

code
┌──────────────────────────────────────────────────────────┐
│              PIV RALPH ORCHESTRATOR                        │
├──────────────────────────────────────────────────────────┤
│ FOR EACH PHASE (START_PHASE to END_PHASE):                │
│   a. Check if PRP exists                                  │
│   b. If not → spawn RESEARCH AGENT (analysis + PRP gen)   │
│   c. Spawn EXECUTOR → EXECUTION SUMMARY                   │
│   d. Spawn VALIDATOR → PASS / GAPS_FOUND / HUMAN_NEEDED   │
│   e. If GAPS_FOUND → Spawn DEBUGGER (max 3x)              │
│   f. Commit on PASS                                       │
│   g. Update WORKFLOW.md                                   │
│   h. Next phase                                           │
└──────────────────────────────────────────────────────────┘