mcpbeat

Validate Skills

microsoft/validate-skills

Validate that commands documented in skill files actually work. Use when creating, updating, or reviewing skills to ensure all documented commands exit with code 0.

760 tokens
context cost
the whole folder, loaded on every use
1
files
instructions only
0
copies elsewhere
how many repositories repackaged it
967
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository
npx skills add https://github.com/microsoft/vstest --skill validate-skills

What it tells the agent to use

found in the instruction text
Bash runs shell commands — read the instruction before connecting

The instruction itself

11 sections, as written by the author

Validating Skills

Verify every executable command in a skill runs successfully on the current OS.

When to Use

  • After creating or updating a skill that contains executable commands
  • During skill review to catch stale or broken instructions
  • When switching OS (e.g. Windows → Linux) to confirm cross-platform commands

Procedure

1. Detect Current OS

Determine which platform commands to extract:

# PowerShell (Windows)
$os = "Windows"
# Bash (Linux / macOS)
OS=$(uname -s)   # "Linux" or "Darwin"

2. Extract Commands

Parse the target skill's SKILL.md and list every shell command for the detected OS:

  • Many skills document commands in tables with Windows and Linux / macOS columns. Pick the column matching your OS.
  • If a command contains comments like # Windows or # Linux / macOS, only run the one for your OS.
  • Placeholder substitution: Replace obvious placeholders (e.g. <path-to-csproj>, <skill-name>) with real values from the repo. If no sensible value exists, skip the command.
  • Adapt cross-platform commands: Commands like ls -la should be adapted to PowerShell equivalents (Get-ChildItem) on Windows when no native Windows command is documented.

3. Track Results

Use the SQL tool to create a tracking table:

CREATE TABLE skill_commands (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  skill TEXT NOT NULL,
  command TEXT NOT NULL,
  expected_exit INTEGER DEFAULT 0,
  actual_exit INTEGER,
  status TEXT DEFAULT 'pending',
  notes TEXT
);

4. Run Each Command

For every extracted command:

  • Run it from the repo root
  • Record the exit code
  • Classify the result:
  • Exit 0 → PASS
  • Non-zero + environment issue (missing SDK, no internet) → ENV_ISSUE
  • Non-zero + command/docs wrong → ERROR

5. Safety Rules

> CRITICAL: Never run unfiltered integration/acceptance tests. They take hours.

> - test.sh --integrationTest or test.cmd -Integration MUST include a --filter or -p flag.

> - test.sh -p smoke is acceptable (scoped to smoke tests), but expect it to be slow.

6. Report

After all commands finish, print a summary:

=== Skill Validation Report ===
Skill: <skill-name>
OS: <Linux|Darwin|Windows>
Commands tested: N
PASS: X
ENV_ISSUE: Y (list with reasons)
ERROR: Z (list failed commands with exit codes)

7. Fix or Flag

  • ERROR (documentation bug): Update the skill's SKILL.md to fix the command.
  • ENV_ISSUE: Add a troubleshooting note to the skill if the environment prerequisite is not already documented.
  • PASS: No action needed.

Ordering Tips

  • Run restore/build before tests (tests depend on build output)
  • Run the cheapest commands first to fail fast
  • Batch independent test commands in parallel when possible

How to use it

Copy the folder

Take microsoft/validate-skills from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.