SKILL.md

--- frontmatter

name: phase-verify
description: Phase 4 of assist workflow - EXIT GATE validation. Schema compliance check before completion.
allowed-tools: ["Read", "Bash", "Grep"]

Phase 4: Verify (EXIT GATE)

MANDATORY - This phase cannot be skipped. All generated components must pass validation.

Purpose

Ensure generated components are:

•Schema-compliant (frontmatter, structure)
•Properly registered (marketplace.json)
•Internally consistent (references exist, scripts work)

Validation Script

bash

python3 scripts/schema_validator.py \
  --path {generated_path} \
  --type {skill|agent|command|hook} \
  --strict

Exit Codes

Code	Meaning	Action
0	✅ PASS	Workflow complete
2	❌ FAIL	Show errors, require fix

Validation Checklist

All Components

• File exists at expected path
• Frontmatter is valid YAML
• Required fields present
• Field values match schema types

Skill-Specific

• SKILL.md exists in directory
• name matches directory name
• description is non-empty
• allowed-tools is valid array (if present)
• Word count < 500 (warning if exceeded)
• Referenced files in references/ exist

Agent-Specific

• File ends with .md
• name and description present
• tools field valid (array, omitted, or empty)
• skills reference existing skills
• model is valid (opus/sonnet/haiku)

Command-Specific

• File ends with .md
• description present
• argument-hint format valid

Hook-Specific

• Valid JSON syntax
• Event types are known
• Matcher patterns are valid regex
• Referenced scripts exist
• Timeout values reasonable (3-60s)

Error Categories

E0XX - Blocking Errors

Must be fixed before proceeding:

code

E001: Missing required file
E002: Invalid YAML frontmatter
E003: Missing required field
E004: Type mismatch
E005: Referenced file not found

W0XX - Warnings

Allowed to proceed, but should address:

code

W001: SKILL.md exceeds 500 words
W002: No description triggers
W003: tools: [] but description implies tool usage
W004: Unregistered in marketplace.json

Auto-Fix Options

bash

# Preview fixes without applying
python3 scripts/schema_validator.py --fix --dry-run

# Apply fixes automatically
python3 scripts/schema_validator.py --fix

Auto-Fixable Issues

Issue	Auto-Fix
Missing marketplace.json entry	Add entry
Frontmatter formatting	Reformat YAML
Missing references directory	Create directory

Manual Fix Required

Issue	Why
Missing required fields	Need user input
Invalid field values	Need clarification
Wrong component type	Design decision

Output Format

yaml

Phase: verify
Status: completed  # or failed
Result:
  passed: true
  errors: []
  warnings:
    - W001: SKILL.md is 523 words (recommended < 500)
  auto_fixed:
    - Added skill to marketplace.json

State Update

bash

# On success
python3 scripts/workflow_state.py update verify completed

# On failure
python3 scripts/workflow_state.py update verify failed

Integration with Hooks

The verify phase is enforced via Stop hook:

json

{
  "hooks": {
    "Stop": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "python3 \"${CLAUDE_PLUGIN_ROOT}/scripts/schema_validator.py\" --strict",
            "timeout": 15
          }
        ]
      }
    ]
  }
}

Retry on Failure

If validation fails:

•Show specific error messages
•Suggest fixes (or apply auto-fix)
•Re-run verification
•Loop until pass or user abort

code

┌────────────────────────────────────────┐
│  ❌ Verification Failed                │
│                                        │
│  E003: Missing 'description' field     │
│        in agents/my-agent.md           │
│                                        │
│  Fix: Add description to frontmatter   │
│                                        │
│  Options:                              │
│  1. Fix manually and re-verify         │
│  2. [Auto-fix] Add placeholder         │
│  3. Abort workflow                     │
└────────────────────────────────────────┘

Completion

When all validations pass:

code

┌────────────────────────────────────────┐
│  ✅ Verification Complete              │
│                                        │
│  Generated:                            │
│  • skills/my-skill/SKILL.md            │
│  • skills/my-skill/references/guide.md │
│                                        │
│  Registered in marketplace.json ✓      │
│  Schema validation passed ✓            │
│                                        │
│  Workflow Status: SUCCESS              │
└────────────────────────────────────────┘