Validate skills against Anthropic best practices for frontmatter, structure, content, file organization, hooks, MCP, and security (62 rules in 8 categories). Use when creating new skills, updating existing skills, before publishing skills, reviewing skill quality, or when user mentions "validate skill", "check skill", "skill best practices", "skill review", or "lint skill".
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See how to installReview the instructions the agent will receive before you install.
Run automated checks against 62 rules covering frontmatter, structure, content, files, references, security, hooks, and MCP.
scripts/validate_skill.py /path/to/skill-directory
With severity filter:
scripts/validate_skill.py /path/to/skill --min-severity warning
| Category | Rules | Checks |
|---|---|---|
| Frontmatter | FM001-FM018 | Required fields, naming, description, context/agent, maxTurns, memory, disable-model-invocation |
| Structure | SS001-SS006 | Line limits, progressive disclosure |
| Content | CW001-CW009 | Writing style, terminology, string substitution, dynamic context injection, ultrathink |
| Files | FO001-FO007 | Naming conventions, forbidden files |
| References | RI001-RI003 | Broken links, orphan files |
| Security | SC001-SC005 | eval/exec, undocumented constants |
| Hooks | HK001-HK003 | Hook structure, handler format, matcher format |
| MCP | MC001 | MCP server configuration format |
| Level | Action |
|---|---|
| CRITICAL | Must fix before publishing |
| ERROR | Should fix |
| WARNING | Consider fixing |
| SUGGESTION | Optional improvement |
=== Skill Validation Report: my-skill ===
Summary: 0 critical, 1 error, 2 warnings, 1 suggestion
[ERROR] SS002: SKILL.md exceeds 500 lines (523 lines)
Location: SKILL.md
Fix: Split content into WORKFLOW.md, EXAMPLES.md, TROUBLESHOOTING.md
[WARNING] CW001: Second-person language detected
Location: SKILL.md:45
Found: "You should create..."
Fix: Use imperative: "Create..."
--min-severity {critical,error,warning,suggestion} # Filter output
--format {text,json} # Output format
--ignore RULE1,RULE2 # Skip specific rules
"False positive on second-person"
--ignore CW001 to suppress"Script security warning"
# skill-validator: ignore SC001"Hook/MCP validation incomplete"
pip install pyyamlSee TROUBLESHOOTING.md for complete issue handling.
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Create, review, and manage Architecture Decision Records (ADRs) with auto-numbering, template detection, quality review, and index maintenance. Use when user mentions "ADR", "architecture decision", "document this decision", "create ADR", "review ADR", editing ADR files (docs/adr/, doc/adr/, .adr/), or discussing architectural choices and tradeoffs.
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Analyze system architecture, module structure, API contracts, data models, and code patterns. Use when designing systems, reviewing module boundaries, evaluating API designs, analyzing data models, checking pattern conformance, tracing decisions, or reviewing frontend architecture. Triggers: "architecture", "module design", "API design", "data model", "boundaries", "patterns", "decisions", "frontend architecture".
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Converts natural-language descriptions or UI spec files into optimized Google Stitch prompts. Use when creating, refining, or validating design directives for Google Stitch. Use when user says "create a Stitch prompt", "optimize this for Stitch", "convert this spec to a Stitch prompt", "write a UI prompt", or mentions Google Stitch prompt authoring. Follows Stitch best practices with short, directive prompts focused on screens, structure, and visual hierarchy.
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Zero-dependency live-preview server providing an agent↔browser bidirectional companion. Watches a content directory, wraps HTML fragments in a frame template, broadcasts live-reload over WebSocket, and captures browser-side click events to a JSONL file. Use when an agent needs to show HTML to the user in a browser and react to clicks — mockups, design exploration, gallery browsing, multi-select choices, prototype iteration. Triggered by "live preview", "browser companion", "preview server", "browser mockup", "show in browser", "arkhe-preview", or any skill that wants to write HTML fragments and have the user see them reload in real time.
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Deletes merged git branches (local and remote) and flags stale unmerged branches for manual review. Use when user mentions "cleanup branches", "delete merged branches", "prune old branches", "remove stale branches", "branch cleanup", or runs /cleanup-branches command.
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Interactive Claude Code environment setup wizard. Detects existing configuration, guides through best-practice setup for Global CLAUDE.md, project scaffolding, MCP servers, hooks, custom agents, keybindings, and settings. Use when user runs /devtools:code-env-setup, mentions "setup claude code", "configure claude", "claude code setup", "environment setup", or "initialize claude code".
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