Skill Test#

Test, evaluate, and grade agent skills across platforms. Catch regressions, verify triggers, score outputs, and track quality over time — without depending on any specific agent runtime.

Quick Start#

Choose one of these entry points:

1. Trial Mode: test a skill safely before trusting or adopting it.
2. Publish Evaluation Mode: evaluate a skill before submitting it to ClawHub or skills.sh.

Always start by reading the target SKILL.md, then run:

sh

python3 {baseDir}/scripts/eval_skill.py <skill-path>

Included Tooling#

This package bundles one executable:

• scripts/eval_skill.py for static quality, structure, and release-readiness checks

Deterministic graders, runtime smoke tests, and LLM rubric grading are optional workflows you define around the target skill. They are not extra bundled executables inside this package.

When to Use This Skill#

Use this skill when you need evidence that a skill is ready to publish, ship, or compare against a previous version.

Typical use cases:

• Check whether a skill triggers for the right prompts
• Generate or refine an eval.yaml suite when regression testing is needed
• Review release blockers before publishing to ClawHub or skills.sh
• Compare two versions of a skill for regressions
• Turn vague quality concerns into a structured scorecard

Trial Mode#

Use Trial Mode when the question is: "Should I trust or adopt this skill at all?"

Trial Mode should focus on:

• Safe first-pass inspection of SKILL.md, scripts, and references
• Boundary review: what the skill can and cannot do
• Obvious side effects, credentials, or risky commands
• Whether the skill is coherent enough to justify deeper testing

Publish Evaluation Mode#

Use Publish Evaluation Mode when the question is: "Is this skill ready to publish or update?"

Publish Evaluation Mode should focus on:

• Trigger quality and first-screen clarity
• Structural integrity and portable commands
• Release blockers in documentation or workflow
• Regression checks against a previous version when available

When Not to Use This Skill#

Do not use this skill when the task is primarily listing optimization rather than quality validation.

Use a different workflow when you need to:

• Improve search visibility, naming, slug choice, or listing copy
• Perform a general code review unrelated to skill behavior
• Design a new skill from scratch without evaluating an existing one
• Debug a specific runtime failure in an underlying product or API

When the Evaluation Is Inconclusive#

If the static report cannot prove readiness, say what is still unverified and what test evidence is missing.

Common next steps:

• Add or tighten eval.yaml with deterministic checks
• Run comparative evaluation against a known-good baseline
• Add stronger negative trigger tests for boundary cases
• Escalate to manual runtime testing when the skill depends on external systems

Isolation Principle#

Treat third-party or unfamiliar skills as untrusted until reviewed.

When testing a skill:

• Do not load the target skill into the main working context unless necessary
• Prefer disposable sessions, sub-agents, or isolated workspaces for risky skills
• Inspect scripts and references before running commands with side effects
• Be explicit about what was statically inspected versus what was actually executed

Assistant Responsibilities#

When using this skill, the assistant should:

• Read the target skill's SKILL.md, scripts, and references before judging quality
• Run the static evaluator first to establish a baseline
• Separate proven failures from unverified concerns
• Recommend the smallest next test that would most reduce uncertainty
• Preserve the target skill's capability boundary while improving testability
• Use isolated evaluation where side effects, credentials, or shell commands make blind execution risky

Recommended Output Structure#

Organize the final evaluation report like this:

1. Overall score and release-readiness summary
2. Highest-severity findings first
3. Per-dimension scores with brief explanations
4. What is verified versus what is still unverified
5. Next actions in priority order

Notes and Constraints#

Keep these limits explicit when reporting results:

• Static analysis is not proof of runtime correctness
• Baseline platform compatibility may be partial or inferred
• The only bundled executable is scripts/eval_skill.py; deeper deterministic or LLM grading needs additional user-defined setup
• LLM rubric grading is optional, requires an external model provider, and should be labeled as qualitative
• Regression claims should cite a baseline, not intuition
• If a skill depends on external systems, publish-readiness may still require manual verification
• eval.yaml is an optional quality asset, not a universal release requirement
• UI metadata such as agents/openai.yaml is optional and should not be treated as a baseline quality gate

Edge Cases#

Call out these cases explicitly when they appear:

• The skill requires credentials or paid APIs
• The skill contains many auxiliary files beyond SKILL.md
• The skill shells out to destructive or stateful commands
• The baseline version is missing or not comparable
• Static checks pass, but runtime proof is still absent

Prerequisites#

• Python 3.10+ available as python3.
• The target skill must have a SKILL.md with valid YAML frontmatter.
• No API key is required for the bundled static evaluator.
• If you choose to run external LLM rubric grading outside this package, configure the provider credentials required by your own grading environment.

Example Prompts#

• Is this skill ready to publish on skills.sh, or does it still have quality gaps?
• Audit this skill before I submit it to ClawHub and show me the release blockers.
• Evaluate this skill and tell me if it would trigger correctly for common user prompts.
• Write a test suite for my skill that covers trigger, output, and style checks.
• Run the skill-test grader against this skill folder and show me the report.
• Compare the current version of this skill against the previous version and flag regressions.
• Audit this skill's trigger description — does it fire when it should and stay silent when it shouldn't?
• Benchmark this skill: run 10 trials and give me pass rates with confidence intervals.
• Find trigger gaps, output issues, and release blockers in this skill before publication.

Workflow#

1. Identify the target skill folder. Read its SKILL.md to understand intent and structure.

2. Run the bundled static analyzer to get a baseline quality report: sh

   python3 {baseDir}/scripts/eval_skill.py <skill-path>
   
   

3. Read references/eval-methodology.md for the full evaluation framework.

4. Read references/grader-patterns.md for grader implementation guidance.

5. Read references/sandbox-testing.md when the target skill is third-party, risky, or side-effectful.

6. Read references/comparison-workflow.md when comparing two versions of a skill.

7. Read references/publish-evaluation.md when preparing a skill for ClawHub or skills.sh release.

8. Based on the skill type, apply the appropriate evaluation strategy:

   • Trigger evaluation: test whether the skill activates for the right prompts and stays silent for wrong ones.
   • Deterministic grading: check concrete outcomes (files created, commands run, structure correct) using target-skill-specific checks you define.
   • LLM rubric grading: score qualitative aspects (style compliance, workflow fidelity, convention adherence) only if you intentionally add an external grading environment.
   • Regression tracking: compare scores across versions or model updates.

9. Generate or refine an eval.yaml test suite for the target skill when repeatable regression testing is needed.

10. Present results as a structured report with scores, findings, and actionable fixes.

Evaluation Dimensions#

The evaluator scores skills across five dimensions:

DimensionWhat it measuresWeightTrigger accuracyDoes the skill fire for correct prompts and stay silent for incorrect ones?25%Structural integrityAre referenced files, links, and paths valid and portable?20%Content qualityDoes SKILL.md document workflow, prerequisites, commands, and completion criteria?25%Baseline platform compatibilityDoes the skill meet the minimum structural expectations for OpenClaw-style packaging, with other platforms treated as coarse compatibility checks?15%TestabilityCan automated graders verify the skill's outcomes and boundaries?15%

Output Requirements#

Produce a structured report containing:

• Overall score (0–100) and per-dimension scores
• Trigger test results: which prompts fired correctly, which misfired or missed
• Deterministic check results: pass/fail for each concrete assertion
• LLM rubric results: per-criterion scores with notes
• Regression flags: any dimension that dropped compared to baseline
• Prioritized action list with critical, high, medium, low severity

Writing Eval Suites#

When the user asks you to create tests for a skill, generate an eval.yaml in the target skill folder:

yaml

version: "1"
defaults:
  trials: 5
  timeout: 300
  threshold: 0.8

trigger_tests:
  - id: explicit-invoke
    should_trigger: true
    prompt: "Use the $<skill-name> skill to do X"
  - id: implicit-invoke
    should_trigger: true
    prompt: "Do X with Y for quick Z experiments"
  - id: negative-control
    should_trigger: false
    prompt: "Add Y to my existing X project"

outcome_tests:
  - id: file-structure
    type: deterministic
    checks:
      - file_exists: "package.json"
      - file_exists: "src/index.ts"
      - command_ran: "npm install"
  - id: style-compliance
    type: llm_rubric
    rubric: |
      Structure (0-0.5): Does the output match the declared project layout?
      Conventions (0-0.5): Are naming, formatting, and tooling choices consistent?

Static Analysis Checks#

The built-in analyzer verifies without running the skill:

• Frontmatter completeness: name, description, trigger phrasing, length
• Structural integrity: referenced files exist, commands use {baseDir}, no dead links
• Definition of done: a measurable completion criteria section exists
• Example coverage: at least 3 realistic user-facing example prompts
• Boundary clarity: the skill states what it does NOT do
• Baseline platform compatibility: SKILL.md validity first, with other platform hints checked only when relevant

Commands#

sh

# Full evaluation report (text)
python3 {baseDir}/scripts/eval_skill.py /path/to/skill

# JSON output for automation
python3 {baseDir}/scripts/eval_skill.py /path/to/skill --json

# Evaluate with explicit quality keywords
python3 {baseDir}/scripts/eval_skill.py /path/to/skill --keywords "backup,restore,disaster recovery"

# Generate eval.yaml scaffold for a skill
python3 {baseDir}/scripts/eval_skill.py /path/to/skill --scaffold

# Compare two versions of a skill
python3 {baseDir}/scripts/eval_skill.py /path/to/skill-v2 --baseline /path/to/skill-v1

Definition of Done#

• The static analyzer has run and produced a baseline report.
• All critical and high findings have been addressed or explicitly justified.
• Trigger tests cover at least 1 explicit, 1 implicit, and 1 negative prompt.
• Platform readiness shows green for the target platforms.
• If comparing versions, no regression flags remain unexplained.
• The final report has been presented to the user with scores and actionable next steps.

When Editing a Skill Based on Eval Results#

• Fix critical and high issues first.
• Preserve the existing capability surface unless the user asks to expand it.
• After each fix, re-run the evaluator to confirm improvement and catch new regressions.
• Do not chase a perfect score at the cost of readability or actual utility.

Resources#

• Full evaluation methodology: references/eval-methodology.md
• Grader patterns and implementation: references/grader-patterns.md
• Safe testing for third-party skills: references/sandbox-testing.md
• Version-to-version comparison workflow: references/comparison-workflow.md
• Publish-time evaluation workflow: references/publish-evaluation.md