PM Skill Validate

This skill audits an existing pm-skills skill against the repo's structural conventions and quality criteria. It produces a validation report that a human can scan and that /pm-skill-iterate can consume as input.

The validator checks two tiers:

• Tier 1 (Structural) . deterministic checks that mirror CI: frontmatter, naming, file presence, description word count.
• Tier 2 (Quality) . LLM-assessed coherence checks: does the output contract reference the template? Is the example complete? Are checklist items testable?

When to Use

• After creating a skill with /pm-skill-builder, before shipping
• After manually editing a skill, to confirm it still passes conventions
• Before running /pm-skill-iterate, to identify what needs improvement
• When a convention changes, to audit which skills need updating (batch mode)
• When reviewing a contributed skill for quality and completeness

When NOT to Use

• To create a new skill from scratch -> use /pm-skill-builder
• To fix or improve a skill -> use /pm-skill-iterate (feed it this report)
• To run CI checks in a pipeline -> use scripts/lint-skills-frontmatter.sh (this skill is for interactive, deeper-than-CI validation)

Instructions

When asked to validate a skill, follow these steps:

Step 1: Identify the Target

Accept the skill name in any form:

• Directory name: deliver-prd
• Full path: skills/deliver-prd/SKILL.md
• Slash command: /prd

Resolve to the canonical directory path: skills/{name}/.

If the skill directory does not exist, report immediately:

# Validation Report: {input}
Result: FAIL
Skill directory `skills/{input}/` does not exist.

Batch mode: If the input is --all, run Tier 1 structural checks across all skills and produce a summary table (see Step 5). Do not run Tier 2 in batch mode.

Step 2: Read Skill Files

Read all files in the skill directory:

File	Required	Purpose
SKILL.md	yes	Frontmatter + instructions
references/TEMPLATE.md	yes	Output template
references/EXAMPLE.md	yes	Worked example
HISTORY.md	no	Version history (if present)

Also read:

• The corresponding command file: commands/{command-name}.md
• The AGENTS.md entry for this skill

If reading files is not possible (MCP/embedded environment), ask the user to paste the content of each file before proceeding (see Degraded Mode).

Step 3: Run Tier 1 . Structural Checks

Run these deterministic checks. Each produces a PASS or FAIL line.

Check ID	What to check	Pass condition
frontmatter-at-byte-zero	First line of SKILL.md, references/TEMPLATE.md, references/EXAMPLE.md is exactly ---	Line 1 is the opening --- fence with no preceding HTML comment, BOM, or whitespace. Severity: FAIL. Reference: library/skill-output-samples/SAMPLE_CREATION.md Section 5.
name-match	Frontmatter name matches directory name	Exact string match
description-present	Frontmatter description exists	Non-empty value
description-length	Description word count	20-100 words
version-present	Frontmatter version exists	Non-empty, valid SemVer
updated-present	Frontmatter updated exists	Non-empty, ISO date
license-present	Frontmatter license exists	Non-empty value
phase-classification	Phase/classification consistency	Domain has phase:, foundation/utility has classification:, not both
template-exists	references/TEMPLATE.md exists	File present
template-sections	TEMPLATE.md has sufficient structure	≥3 ## level-2 headers
example-exists	references/EXAMPLE.md exists	File present
command-exists	Command file exists in commands/	File present and references correct skill path
agents-entry	AGENTS.md has an entry for this skill	Entry exists with matching **Path:**

Step 4: Run Tier 2 . Quality Checks

Run these LLM-assessed checks. Each produces a PASS, WARN, or INFO line. Tier 2 findings are capped at WARN unless objectively grounded (placeholder leakage is the exception . it can FAIL).

Check ID	What to assess	How to assess	Max severity
output-contract-coverage	SKILL.md references the template	Check for explicit reference to references/TEMPLATE.md or "use the template" in an Output section. Accept either pattern as valid. WARN only if template is not referenced at all.	WARN
checklist-verifiability	Quality checklist items are testable	Read each checklist item. Flag items that are vague ("is good quality") vs. specific ("metrics are measurable"). WARN if ≥2 items are vague.	WARN
example-completeness	EXAMPLE.md fills all template sections	Compare ## headers in TEMPLATE.md against ## headers in EXAMPLE.md. WARN if EXAMPLE.md is missing sections that appear in the template. Also check for unresolved placeholders. Line count is informational only . report it but do not gate on it.	WARN
template-example-alignment	EXAMPLE.md follows TEMPLATE.md structure	Compare section header ordering. WARN if EXAMPLE.md has sections in a different order or uses different header names than TEMPLATE.md.	WARN
description-actionability	Description tells when to use the skill	Check for a trigger phrase like "Use when..." or "Use for..." in the frontmatter description. WARN if the description only says what the skill does without indicating when to use it.	WARN
instruction-clarity	Instructions are numbered and imperative	Check for ### Step headings or a numbered list pattern in the Instructions section. WARN if instructions are prose paragraphs without clear step structure.	WARN
placeholder-leakage	No leftover scaffolding in any shipped file	Scan SKILL.md, TEMPLATE.md, and EXAMPLE.md for: [Placeholder] or [Feature Name] patterns, <!-- ... --> HTML comments (except the license header), template guidance blockquotes that should have been removed, and authoring notes like "TODO" or "FIXME". FAIL if any are found . this is objectively grounded.	FAIL
when-not-to-use	"When NOT to Use" section present in SKILL.md	Check for a section with "When NOT to Use" or similar heading. INFO only . this is present in 1/27 shipped skills and is not yet a convention.	INFO

Quality standard framing: These checks validate against current library conventions . what the shipped library actually does today. Findings graded WARN or INFO represent the v2.8 quality standard that newer skills (built with /pm-skill-builder) meet. Older skills may legitimately receive these findings until iterated through the lifecycle.

Step 5: Produce the Validation Report

Assemble the report using this exact structure. F-11 (/pm-skill-iterate) parses this report by section headings and pipe-delimited fields.

# Validation Report: {skill-name}
Date: {YYYY-MM-DD}
Skill version: {version from frontmatter}
Validator version: 1.0.0
Report schema: v1
Result: {PASS | WARN | FAIL}

## Summary
{1-2 sentence overall assessment.}
Errors: {n} | Warnings: {n} | Info: {n}

> Tier 2 findings are heuristic quality assessments and may require human review.

## Structural Checks
- {STATUS} | structural | {check-id} | {message}
- {STATUS} | structural | {check-id} | {message}
...

## Quality Checks
- {STATUS} | quality | {check-id} | {message}
- {STATUS} | quality | {check-id} | {message}
...

## Recommendations
1. {STATUS} | {check-id} | Target: {file-path}
   Action: {what to do}
2. {STATUS} | {check-id} | Target: {file-path}
   Action: {what to do}
...

Report rules:

• Result = worst severity found: any FAIL → FAIL, else any WARN → WARN, else PASS.
• Structural Checks: one line per Tier 1 check. STATUS is PASS or FAIL.
• Quality Checks: one line per Tier 2 check. STATUS is PASS, WARN, or INFO.
• Recommendations: only include checks that did NOT pass. Each recommendation includes the check ID, the target file path, and a specific action.
• If all checks pass, the Recommendations section should say: "No issues found."
• Omit passing checks from Recommendations . only list findings that need action.

Batch mode output (when input is --all):

Run Tier 1 structural checks only across all skills. Produce a summary table:

# Batch Validation Summary
Date: {YYYY-MM-DD}
Validator version: 1.0.0
Report schema: v1
Skills checked: {n}

| Skill | Result | Errors | Warnings |
|-------|--------|--------|----------|
| deliver-prd | PASS | 0 | 0 |
| define-hypothesis | WARN | 0 | 1 |
| foundation-persona | FAIL | 1 | 0 |
...

Skills passing: {n}/{total}
Run `/pm-skill-validate {skill}` for a detailed report.

Degraded Mode

If you cannot read skill files directly (e.g., running via MCP or in an embedded environment without file system access):

1. Ask the user to provide the content of each required file:
   • skills/{name}/SKILL.md
   • skills/{name}/references/TEMPLATE.md
   • skills/{name}/references/EXAMPLE.md
2. Run all checks against the provided content.
3. Note in the report: "Validated from user-provided content (file system not available)."
4. Batch mode is not available in degraded mode . single skill only.

Output Contract

The validator MUST produce a validation report following the format in Step 5.

The report:

• Uses the exact section headings: ## Summary, ## Structural Checks, ## Quality Checks, ## Recommendations
• Uses pipe-delimited check lines: STATUS | TIER | CHECK-ID | message
• Uses pipe-delimited recommendations: STATUS | CHECK-ID | Target: path followed by Action: description on the next line
• Includes Report schema: v1 in the header for F-11 compatibility
• Includes the Tier 2 caveat line in the Summary section

Quality Checklist

Before delivering the report, verify:

• All Tier 1 structural checks were run (not skipped)
• All Tier 2 quality checks were run (not skipped) . single skill mode only
• Report follows the exact section and line format from Step 5
• Every non-passing check appears in Recommendations with a target file path
• Result field reflects the worst severity found
• Tier 2 findings are capped at WARN (except placeholder-leakage which can FAIL)
• No Tier 2 check was marked FAIL unless objectively grounded

Examples

See references/EXAMPLE.md for a completed validation report demonstrating both Tier 1 and Tier 2 checks against a real shipped skill.