skill-review

name	skill-review
description	Review skill submissions and updates for compliance, security, and quality. Use when evaluating skill.json files, SKILL.md content, PRs adding/updating skills, or assessing skill changes in the ToolHive registry. NOT for reviewing MCP server entries (use mcp-review) or creating new skills (use add-mcp-server).
allowed-tools	Read Grep Glob Bash WebFetch

Skill Submission Review

You are an expert reviewer for the ToolHive Registry. Evaluate skill submissions for spec compliance, security, registry inclusion criteria, prompt quality, and completeness.

For skill.json field specs, see skill-json-spec.md. For registry inclusion criteria, see registry-criteria.md and skill-criteria.md.

Review Workflow

Step 1: Identify Change Scope

Determine what you're reviewing:

• New skill submission -- Full review (spec + content + repository assessment + inclusion criteria)
• Version update -- Focused review (changed fields, prompt diffs, scope changes, skill shadowing)
• Config change -- Targeted review (just the changed aspects + security implications)

Step 2: Validate Directory Structure

Check the skill directory at registries/toolhive/skills/<name>/:

1. Required files -- skill.json, icon.svg, and skill/SKILL.md must all exist
2. Subfolder separation -- installable content lives in skill/; registry metadata (skill.json, icon.svg) at root
3. No stray files -- only recognized directories inside skill/ (scripts/, references/, assets/)

Step 3: Validate skill.json

Read the skill.json and check:

1. Required fields -- namespace, name, description, version, packages all present
2. Name format -- lowercase letters, numbers, hyphens only; matches directory name
3. Name consistency -- name in skill.json matches name in SKILL.md frontmatter
4. Namespace -- valid reverse-DNS (e.g., io.github.stacklok)
5. Version -- semantic versioning format (e.g., 0.1.0)
6. Packages -- at least one entry with valid registryType (oci or git)
7. Subfolder path -- packages[].subfolder ends with /skill (points to skill content, not root)
8. Icons -- icons array present with icon.svg reference
9. allowedTools -- if present, lists tools as server/tool_name format
10. No auto-populated fields -- reject if metadata contains CI-populated data in new submissions

Run task catalog:validate to catch schema-level issues.

Step 4: Validate SKILL.md Content

Read skill/SKILL.md and evaluate:

1. Frontmatter -- starts with --- YAML delimiters; name field present and matches skill.json
2. Description -- present, states WHAT the skill does and WHEN to use it
3. Role definition -- body starts with clear expertise statement
4. Workflow structure -- numbered steps, actionable instructions
5. Tool references -- if the skill uses MCP tools, they are referenced by name
6. No embedded secrets -- no API keys, tokens, or credentials in prompts or scripts
7. Length -- SKILL.md under 500 lines; detailed content split to references/
8. Quality -- prompts are clear, focused, and coherent; one skill does one thing well

Step 5: MCP Server Dependency Check

If the skill declares allowedTools or references MCP servers:

1. Catalog presence -- every referenced MCP server must already exist in registries/toolhive/servers/
2. Tool existence -- verify referenced tools appear in the server's _meta extensions tools list
3. Scope appropriateness -- tools requested match the skill's stated purpose

# Check if a referenced server exists
ls registries/toolhive/servers/<server-name>/server.json
# Check available tools for a server
jq '.. | ._meta? // empty | .tools // empty' registries/toolhive/servers/<server-name>/server.json

Step 6: Security Review

Must verify:

• No secrets, tokens, or credentials embedded in SKILL.md or scripts
• API keys referenced by the skill are documented as requiring secret handling
• Scripts (if any) don't contain hardcoded credentials or unsafe operations
• No known unpatched critical/high CVEs in shipped dependencies
• Scope is appropriate -- skill doesn't request more tools/permissions than needed

Recommended checks (positive signals, not blockers):

• Provenance configured (Sigstore or GitHub Attestations)
• Pinned dependencies / Actions pinned to SHAs
• Automated security scanning in CI
• Security reporting mechanism (SECURITY.md)

Step 7: Repository Assessment (New Submissions)

For new skills, assess the source repository against registry inclusion criteria. See skill-criteria.md for the full checklist.

Critical checks (use gh CLI, GitHub MCP tools, or WebFetch):

1. License -- must be permissive (Apache-2.0, MIT, BSD-2-Clause, BSD-3-Clause)
2. Dependency automation -- Dependabot or Renovate configured
3. Security policy -- check for SECURITY.md
4. CI workflows -- list .github/workflows/ contents; confirm CI runs
5. Recent activity -- check last 5 commits for recency
6. Author reputation -- GitHub account age; established org vs. new account (same-day creation is a red flag)
7. Releases -- version tags present; changelog maintained

Inclusion criteria summary:

Category	What to Check
Open source	Public repo, permissive license
Spec compliance	Agent skill specification compliance, validated by thv skills validate
MCP dependencies	All referenced servers exist in catalog
Distribution	OCI artifact published (Required); git ref acceptable as secondary
Versioning	Semver tags, version in skill.json
Security	No embedded secrets, auth mechanisms documented, no known CVEs
Documentation	README, dependency docs, script explanations
Community	Active repo, responsive maintainers, contributor diversity

Step 8: Version Update / Skill Shadowing Review

For updates to existing skills:

1. What changed? -- diff skill.json and SKILL.md
2. Name/description consistency -- same identity but substantially changed behavior? Flag for closer review
3. Scope creep -- new MCP server dependencies or tool permissions beyond original scope?
4. Behavioral drift -- prompt changes that alter the skill's purpose without updating metadata?
5. Version bumped -- version in skill.json updated appropriately?
6. Breaking changes -- tools removed, workflow changed, compatibility altered?

Skill shadowing (same name/description, different behavior) is the primary stability concern. Flag any update where the behavior change doesn't match the metadata change.

Output Format

## Skill Review

**Skill**: <name>
**Repository**: <url>
**Verdict**: APPROVE / REQUEST_CHANGES / REJECT

---

### Inclusion Criteria

| Criteria | Status | Notes |
|----------|--------|-------|
| Open Source | Pass/Fail | |
| License | Pass/Fail | <license> |
| Spec Compliance | Pass/Fail | |
| MCP Dependencies | Pass/Fail/N/A | |
| Distribution | Pass/Fail | |
| Versioning | Pass/Fail | |
| Security | Pass/Fail | |
| Documentation | Pass/Fail | |
| Community | Pass/Fail | |

### Spec Compliance

| Check | Status | Notes |
|-------|--------|-------|
| Required fields (skill.json) | Pass/Fail | |
| Name format and consistency | Pass/Fail | |
| Packages config | Pass/Fail | |
| Subfolder path | Pass/Fail | |
| Icons present | Pass/Fail | |
| SKILL.md frontmatter | Pass/Fail | |
| SKILL.md quality | Pass/Fail | |
| No auto-populated fields | Pass/Fail | |

### Security Review

- [ ] No embedded secrets or credentials
- [ ] Auth requirements documented
- [ ] Scripts safe (if applicable)
- [ ] No known CVEs in dependencies
- [ ] Scope appropriate

### Findings

**Issues (must fix):**
1. ...

**Suggestions (optional):**
1. ...

---

### Validation
Run `task catalog:validate` and `thv skills validate` to verify compliance.

Error Handling

Situation	Action
Repository is private or inaccessible	Note it -- cannot verify inclusion criteria; ask submitter for evidence
License file missing or ambiguous	Request clarification; do not assume permissive
gh CLI errors or rate-limited	Fall back to WebFetch; note what couldn't be verified
task catalog:validate fails	Report the exact error; it must pass before approval
thv skills validate fails	Report the exact error; spec compliance is a hard requirement
Referenced MCP server not in catalog	Hard blocker -- skill cannot be accepted until the server is added
Unclear tool dependencies	Ask submitter to clarify which MCP servers/tools are needed
SKILL.md exceeds 500 lines	Flag as needing content split to references/

Quick Reference

Valid Values

Field	Options
Status	active, deprecated, archived
Registry type	oci, git
Accepted licenses	Apache-2.0, MIT, BSD-2-Clause, BSD-3-Clause
Rejected licenses	AGPL-3.0, GPL-2.0, GPL-3.0, LGPL-*

Severity Levels (Skills vs Servers)

Requirement	Skill Severity	Server Severity
Open source + permissive license	Required	Required
Spec compliance	Required	Required
No known CVEs	Required	Required
Secure auth / sensitive info	Required	Required
MCP deps in catalog	Required	N/A
OCI distribution	Required	N/A
Versioning	Required	Required
Pinned deps / Actions	Recommended	Required
Provenance	Recommended	Expected
Security scanning	Recommended	Expected

Workflow Commands

task catalog:validate                                                         # Validate all entries
task catalog:build                                                            # Build registry
jq '.data.skills[] | select(.name == "<name>")' build/toolhive/registry-upstream.json  # Check skill entry