skill-test
Validate skill files for structural compliance and behavioral correctness. Four modes: static linter, spec, category rubric, audit.
How do I install this agent skill?
npx skills add https://github.com/donchitos/claude-code-game-studios --skill skill-testIs this agent skill safe to install?
- Gen Agent Trust Hubpass
The skill is a structural and behavioral linter for AI agent skills. It uses dynamic context injection at load time to resolve configuration and is susceptible to indirect prompt injection because it reads and evaluates content from other external skill files.
- Socketpass
No alerts
- Snykpass
Risk: LOW · No issues
- ZeroLeakspass
Score: 93/100 · 2 sections analyzed
What does this agent skill do?
!bash "${CLAUDE_SKILL_DIR}/../../hooks/yaml-helper.sh" resolve_config --keys automation
Automation mode: Resolve modes.automation (project.local.yaml →
project.yaml → default collaborative). Every AskUserQuestion call and
every file write follows .claude/docs/automation-modes.md
(collaborative asks always · guided major-only · autonomous logs and proceeds;
automation_always_ask categories always prompt).
Skill Test
Validates skills (.claude/skills/*/SKILL.md) and agents (.claude/agents/*.md)
for structural compliance and behavioral correctness. No external dependencies —
runs entirely within the existing skill/hook/template architecture.
Four modes:
| Mode | Command | Purpose | Token Cost |
|---|---|---|---|
static | /skill-test static [name|all] | Structural linter — 7 compliance checks per skill (skills only) | Low (~1k/skill) |
spec | /skill-test spec [name] | Behavioral verifier — evaluates assertions in a skill's or agent's test spec | Medium (~5k each) |
category | /skill-test category [name|all] | Category rubric — checks a skill or agent against its category-specific metrics | Low (~2k each) |
audit | /skill-test audit | Coverage report — skills, agent specs, last test dates | Low (~3k total) |
Phase 1: Parse Arguments
Determine mode from the first argument:
static [name]→ run 7 structural checks on one skillstatic all→ run 7 structural checks on all skills (Glob.claude/skills/*/SKILL.md)spec [name]→ read the skill or agent + its test spec, evaluate assertionscategory [name]→ run category-specific rubric fromCCGS Skill Testing Framework/quality-rubric.mdcategory all→ run category rubric for every skill and every agent that has acategory:in catalogaudit(or no argument) → read catalog, list all skills and agents, show coverage
If the argument is unrecognized, output usage and stop.
Resolve the name before spec or category. Look it up in
CCGS Skill Testing Framework/catalog.yaml: an entry under skills: is a skill
(.claude/skills/[name]/SKILL.md); an entry under agents: is an agent
(.claude/agents/[name].md). With no catalog entry, use whichever of those two
files exists. Only when neither exists, report "'[name]' is neither a skill in
.claude/skills/ nor an agent in .claude/agents/." and stop. A name that is
also an ordinary word is still a name: /skill-test spec help tests the /help
skill, never a request for this skill's usage.
static checks SKILL.md structure, so it is skills-only. Given an agent name,
say so and point to /skill-test spec [name] — do not report the agent as
missing.
Phase 2A: Static Mode — Structural Linter
For each skill being tested, read its SKILL.md fully and run all 7 checks:
Check 1 — Required Frontmatter Fields
The file must contain all of these in the YAML frontmatter block:
name:description:argument-hint:user-invocable:allowed-tools:
FAIL if any are absent. A file whose frontmatter does not parse fails Check 1 too — malformed YAML is a structural defect this check exists to catch, not an unassessable file; see the per-skill result rule below.
Check 2 — Multiple Phases
The skill must have ≥2 numbered phase headings. Look for patterns like:
## Phase Nor## Phase N:## N.(numbered top-level sections)- At least 2 distinct
##headings if phases aren't explicitly numbered
FAIL if fewer than 2 phase-like headings are found.
Check 3 — Verdict Keywords
The skill must communicate a clear outcome. Accept any of:
- Gate / review verdicts —
PASS,FAIL,CONCERNS,APPROVED,BLOCKED,COMPLETE,READY,COMPLIANT,NON-COMPLIANT - Go / no-go verdicts —
PROCEED,PIVOT,KILL,GO,NO-GO - Severity scales —
CRITICAL,HIGH,MEDIUM,LOW. Audit skills rank findings by severity instead of issuing one verdict for the whole run.
FAIL if none are present and the skill produces an assessment — its description or body promises a review, audit, check, gate, or readiness judgement.
WARN (never FAIL) if none are present and the skill's output is an artifact
or a value rather than a judgement. /settings is the reference case: it prints
and writes configuration and has no verdict to give. Do not invent one to
satisfy this check.
A narrower list — gate verdicts only, hard FAIL on anything else — would wrongly fail skills for reasons that are not their fault:
/prototypeand/vertical-sliceadvertisePROCEED/PIVOT/KILLin their own descriptions,/adoptand/security-auditrank by severity, and/settingshas no verdict by design. A linter that produces false failures on legitimate patterns stops being trusted.
Check 4 — Collaborative Protocol Language
The skill must contain ask-before-write language. Look for:
"May I write"(canonical form)"before writing"or"approval"near file-write instructions"ask"+"write"in close proximity (within same section)
WARN if absent (some read-only skills legitimately skip this).
FAIL if allowed-tools includes Write or Edit but no ask-before-write language is found.
Check 5 — Next-Step Handoff
The skill must end with a recommended next action or follow-up path. Look for:
- A final section mentioning another skill (e.g.,
/story-done,/gate-check) - "Recommended next" or "next step" phrasing
- A "Follow-Up" or "After this" section
WARN if absent.
Check 6 — Fork Context Complexity
If frontmatter contains context: fork, the skill should have ≥5 phase headings
(## level or numbered Phase N headers). Fork context is for complex multi-phase
skills; simple skills should not use it.
WARN if context: fork is set but fewer than 5 phases found.
Check 7 — Argument Hint Plausibility
argument-hint must be non-empty. If the skill body mentions multiple modes
(e.g., "Mode A | Mode B"), the hint should reflect them. Cross-reference the
hint against the first phase's "Parse Arguments" section.
WARN if hint is "" or if documented modes don't match hint.
Static Mode Output Format
For a single skill:
=== Skill Static Check: /[name] ===
Check 1 — Frontmatter Fields: PASS
Check 2 — Multiple Phases: PASS (7 phases found)
Check 3 — Verdict Keywords: PASS (PASS, FAIL, CONCERNS)
Check 4 — Collaborative Protocol: PASS ("May I write" found)
Check 5 — Next-Step Handoff: WARN (no follow-up section found)
Check 6 — Fork Context Complexity: PASS (8 phases, context: fork set)
Check 7 — Argument Hint: PASS
Verdict: WARNINGS (1 warning, 0 failures)
Recommended: Add a "Follow-Up Actions" section at the end of the skill.
A WARN or FAIL line names its cause in parentheses, and any verdict other than
COMPLIANT ends with a Recommended: line naming the fix.
The single-skill Verdict: is one of four values, the same as the static all
Result column: COMPLIANT (no warnings, no failures), WARNINGS (warnings,
no failures), NON-COMPLIANT (any FAIL), or NOT ASSESSED (the file could
not be read or parsed, or its checks could not run — name the reason).
For static all, produce a summary table then list any non-compliant skills:
=== Skill Static Check: All 74 Skills ===
Skill | Result | Issues
-----------------------|--------------|-------
gate-check | COMPLIANT |
design-review | COMPLIANT |
story-readiness | WARNINGS | Check 5: no handoff
...
Summary: 48 COMPLIANT, 3 WARNINGS, 1 NON-COMPLIANT, 1 NOT ASSESSED
Aggregate Verdict: N WARNINGS / N FAILURES / N NOT ASSESSED
NOT ASSESSED is a per-skill result here, not only an aggregate line. A skill
whose file is missing or otherwise unreadable (permissions, not found), so no
check could even start, is reported as NOT ASSESSED with the reason — never
omitted from the table and never counted as COMPLIANT. Ranked above
COMPLIANT, below WARNINGS and NON-COMPLIANT. A file that was read but
whose frontmatter does not parse is a different case: Check 1 fails on it (see
above), so it is reported NON-COMPLIANT, not NOT ASSESSED — the defect is in
the skill, not in the linter's access to it.
And state the denominator. All 74 Skills in the header must be the number
actually examined, not the number that exist: report [N] of [M] skills checked
whenever they differ. A summary whose counts silently sum to less than its own
title is the failure this skill is supposed to catch in others.
No file writes in static mode.
Phase 2B: Spec Mode — Behavioral Verifier
Step 1 — Locate Files
Use the skill or agent file resolved in Phase 1.
Look up the spec path from CCGS Skill Testing Framework/catalog.yaml — use the
spec: field on the matching skills: or agents: entry.
If either is missing:
- Missing skill or agent: the Phase 1 message.
- Missing spec path in catalog: "No spec path set for '[name]' in catalog.yaml."
- Spec file not found at path: "Spec file missing at [path]. Run
/skill-test auditto see coverage gaps."
Step 2 — Read Both Files
Read the skill or agent file and the test spec file completely.
Step 3 — Evaluate Assertions
Evaluate against what the model running it can see. A skill runs in a
session, and a spawned agent in its own context, and both have the project's
CLAUDE.md loaded along with every file it imports on an @path line (a
spawned agent quotes coordination-rules.md word for word without reading it).
Read those files too. A rule stated there counts for every skill and agent —
cite the file it came from. Where the skill's or agent's own file contradicts
it, the own file wins: it is the more specific instruction.
For an agent, the spec's sections are evaluated against the agent file —
and against every skill its frontmatter lists under skills:, which Claude
Code loads into the agent at launch:
- Static Assertions — check each against the agent's frontmatter and body.
An assertion that names a literal value (a
model:alias, a frontmatter key, a tool name) is an exact comparison with the file:model: inheritdoes not satisfy "Model tier issonnet", and a near match is FAIL, never PARTIAL. - Test Cases — evaluate each case's expected behavior against the agent's
written instructions, the same way a skill's are evaluated below. A case
that names a gate ID (
LP-FEASIBILITY,CD-PILLARS, …) is that gate's invocation: the spawning skill has the agent read.claude/docs/director-gates/[gate-id].mdfirst, so that file's Prompt and Verdicts are the agent's instructions for the case — read it too. - Redirect and escalation cases — the agent is asked for work another role
owns, or meets a conflict it cannot settle. The case is met when the loaded
coordination-rules.mdcovers the step — rule 2 (no binding decisions outside its domain), rule 3 (escalate a conflict to the shared parent) or rule 5 (no files outside its directories without delegation) — and the agent's own file names the owning role in its collaborator, delegation, escalation or "must not" lists. Cite both; do not require the agent to restate the redirect in its own words. It is a FAIL when the agent's file claims that work for itself, or when no loaded file names who owns it. - Protocol Compliance — use the spec's own
## Protocol Compliancelist in place of the four skill checks below.
For a skill, check each of the spec's Static Assertions against the
SKILL.md frontmatter and body the same way; a literal value is an exact
comparison. /skill-test static runs only its 7 fixed checks, so a spec's own
static lines — a verdict keyword, a phase, "May I write" before a named file —
are evaluated here or nowhere.
The rest of this step applies to skills and agents alike.
For each Test Case in the spec:
- Read the Fixture description (assumed state of project files)
- Read the Expected behavior steps
- Read each Assertion checkbox
A case with no Fixture reads its Input as the fixture; a case with no Assertions list treats each Expected behavior bullet as an assertion — most agent specs are written this way, and a case verdict is not left undefined just because it has no separate checklist.
For each assertion, evaluate whether the skill's written instructions, if followed correctly given the fixture state, would satisfy it. This is a Claude-evaluated reasoning check, not code execution.
Mark each assertion:
- PASS — skill instructions clearly satisfy this assertion
- PARTIAL — skill instructions partially address it, but with ambiguity
- FAIL — skill instructions would NOT satisfy this assertion given the fixture
- NOT ASSESSED — the assertion could not be evaluated at all: it names a fixture state the spec never defines, depends on runtime behavior no static read can settle, or references a file or section that does not exist (a file that is merely silent on the behaviour is FAIL or PARTIAL, not this). Rank it above PASS (an assertion nobody could evaluate has not been satisfied) and below PARTIAL and FAIL (an ambiguity somebody identified is more actionable than one nobody could reach). Do not resolve an unevaluable assertion to PASS because the skill "probably" handles it — that judgement is what the spec exists to replace.
For a skill's Protocol Compliance section (always present), evaluate each line
of the spec's own list against the SKILL.md exactly as you evaluate a case
assertion — PASS, PARTIAL, FAIL or NOT ASSESSED. Specs put rules there that no
case repeats ("covered by the protocol compliance assertions above"), so a
list that is not evaluated is a set of rules nobody checks. These four checks are
the floor, added when the list does not already cover them:
- Check whether the skill requires "May I write" before file writes
- Check whether the skill presents findings before requesting approval
- Check whether the skill ends with a recommended next step
- Check whether the skill avoids auto-creating files without approval
Step 4 — Build Report
=== Skill Spec Test: /[name] ===
Date: [date]
Spec: CCGS Skill Testing Framework/skills/[category]/[name].md
Static Assertions:
[PASS] [assertion text]
[NOT ASSESSED] [assertion text]
Reason: [why it could not be evaluated]
Case 1: [Happy Path — name]
Fixture: [summary]
Assertions:
[PASS] [assertion text]
[FAIL] [assertion text]
Reason: The skill's Phase 3 says "..." but the fixture state means "..."
Case Verdict: FAIL
Case 2: [Edge Case — name]
...
Case Verdict: PASS
Protocol Compliance:
[PASS] Uses "May I write" before file writes
[PASS] Presents findings before asking approval
[PARTIAL] No explicit next-step handoff at end
Overall Verdict: FAIL (1 case failed, 1 protocol line partial)
A Case Verdict is the worst result among its assertions, and the Overall Verdict the worst across the static assertions, the cases and Protocol Compliance, in this order: FAIL, PARTIAL, NOT ASSESSED, PASS. An assertion nobody could evaluate keeps the overall result from reading PASS.
For an agent, the header is === Agent Spec Test: [name] ===, Spec: is its
path under CCGS Skill Testing Framework/agents/, and a Static Assertions:
block comes before Case 1.
Step 5 — Offer to Write Results
"May I write these results to CCGS Skill Testing Framework/results/skill-test-spec-[name]-[date].md
and update CCGS Skill Testing Framework/catalog.yaml?"
If yes:
- Write results file to
CCGS Skill Testing Framework/results/ - Update the skill's or agent's entry in
CCGS Skill Testing Framework/catalog.yaml:last_spec: [date]last_spec_result: PASS|PARTIAL|FAIL|NOT ASSESSED— the Overall Verdict
Phase 2D: Category Mode — Rubric Evaluation
Step 1 — Locate Skill and Category
Use the skill or agent file resolved in Phase 1.
Look up the category: field on its skills: or agents: entry in
CCGS Skill Testing Framework/catalog.yaml.
If neither file exists: the Phase 1 message.
If no category: field: "No category assigned for '[name]' in catalog.yaml.
Add category: [name] to its entry first."
For category all: collect every skill and every agent with a category: field
and process each, reporting skills and agents in separate tables.
category: utility skills are evaluated against U1 (static checks pass) and U2
(gate mode correct if applicable) only — skip to the static mode for U1.
Cross-check against .claude/skills/*/SKILL.md and .claude/agents/*.md
(Audit mode's Step 2 glob): list any skill or agent missing from the catalog, or
catalogued with no category:, by name as NOT ASSESSED — never silently
excluded from the run.
Step 2 — Read Rubric Section
Read CCGS Skill Testing Framework/quality-rubric.md.
Extract the section matching the category (e.g., ### gate, ### team; an
agent's category is under ## Agent Categories, e.g. ### director).
If the rubric has no section for the category, the result is NOT ASSESSED:
name the missing section, and never borrow another category's metrics.
Step 3 — Read Skill
Read the skill's SKILL.md or the agent's .claude/agents/[name].md fully,
and the project context Phase 2B Step 3 describes — a metric met by a rule in
CLAUDE.md or a file it imports is met, citing that file. Its rule for
redirect and escalation cases decides the domain, deferral and escalation
metrics too (D2, D3, L2, S1–S3, O2).
Step 4 — Evaluate Rubric Metrics
For each metric in the category's rubric table:
- Check whether the skill's or agent's written instructions clearly satisfy the criterion
- Mark PASS, FAIL, WARN, or NOT ASSESSED (the metric could not be evaluated — name why)
- For FAIL/WARN/NOT ASSESSED, identify the exact gap in the text (quote the relevant section, note its absence, or name what could not be evaluated)
Step 5 — Output Report
For an agent, the header is === Agent Category Check: [name] ([category]) ===.
=== Skill Category Check: /[name] ([category]) ===
Metric G1 — Review mode read: PASS
Metric G2 — Director panel width: FAIL
Gap: Phase 3 spawns only CD-PHASE-GATE at `workflow: full`; TD-PHASE-GATE, PR-PHASE-GATE, AD-PHASE-GATE absent
Metric G3 — Lean mode: PHASE-GATE only: PASS
Metric G4 — Solo mode: no directors: PASS
Metric G5 — No auto-advance: PASS
Verdict: FAIL (1 failure, 0 warnings)
Fix: Size the Phase 3 panel from `modes.workflow` — PR at `minimal`, TD + PR at
`standard`, all four at `full` — and name any perspective a narrower panel leaves out.
The category verdict, first match wins: FAIL when any metric fails; else
WARNINGS when any metric warns; else NOT ASSESSED when any metric could
not be evaluated (a rubric section missing, a file unreadable); else PASS
when every metric passes — the same ranking as static and spec mode. It is
last_category_result in the catalog.
Step 6 — Offer to Update Catalog
"May I update CCGS Skill Testing Framework/catalog.yaml to record this category check
(last_category, last_category_result) for [name]?"
Phase 2C: Audit Mode — Coverage Report
Step 1 — Read Catalog
Read CCGS Skill Testing Framework/catalog.yaml. If missing, note that catalog doesn't exist
yet (first-run state).
Step 2 — Enumerate All Skills and Agents
Glob .claude/skills/*/SKILL.md to get the complete list of skills.
Extract skill name from each path (directory name).
Glob .claude/agents/*.md for the complete list of agents — the repo itself,
not the catalog, is the covered set (.claude/rules/skill-authoring.md §5:
gates derive their covered set, they do not enumerate it). Compare both globs
against the catalog's skills:/agents: entries and report any skill or agent
missing from the catalog by name, so an uncatalogued one cannot drop out silently.
Step 3 — Build Skill Coverage Table
For each skill:
- Check if a spec file exists (use the
spec:path from catalog, or globCCGS Skill Testing Framework/skills/*/[name].md) - Look up
last_static,last_static_result,last_spec,last_spec_result,last_category,last_category_result,categoryfrom catalog (or mark as "never" / "—" if not in catalog) - Priority comes from catalog
priority:field (critical/high/medium/low)
Step 3b — Build Agent Coverage Table
For each agent in catalog's agents: section:
- Check if a spec file exists (use the
spec:path from catalog, or globCCGS Skill Testing Framework/agents/*/[name].md) - Look up
last_spec,last_spec_result,last_category,last_category_result,categoryfrom catalog
Step 4 — Output Report
=== Skill Test Coverage Audit ===
Date: [date]
SKILLS (74 total)
Specs written: 73 (99%) | Never static tested: 74 | Never category tested: 74
Skill | Cat | Has Spec | Last Static | S.Result | Last Cat | C.Result | Priority
-----------------------|----------|----------|-------------|----------|----------|----------|----------
gate-check | gate | YES | never | — | never | — | critical
design-review | review | YES | never | — | never | — | critical
...
AGENTS (49 total)
Agent specs written: 49 (100%)
Agent | Category | Has Spec | Last Spec | Result | Last Cat | C.Result
-----------------------|------------|----------|-------------|--------|----------|----------
creative-director | director | YES | never | — | never | —
technical-director | director | YES | never | — | never | —
...
Top 5 Priority Gaps (skills with no spec, critical/high priority):
(none if all specs are written)
Skill coverage: 73/74 specs (99%)
Agent coverage: 49/49 specs (100%)
No file writes in audit mode.
Offer: "Would you like to run /skill-test static all to check structural
compliance across all skills? /skill-test category all to run category rubric
checks? Or /skill-test spec [name] to run a specific behavioral test?"
Phase 3: Recommended Next Steps
After any mode completes, offer contextual follow-up:
- After
static [name]: "Run/skill-test spec [name]to validate behavioral correctness if a test spec exists." - After
static allwith failures: "Address NON-COMPLIANT skills first. Run/skill-test static [name]individually for detailed remediation guidance." - After
spec [name]PASS: "UpdateCCGS Skill Testing Framework/catalog.yamlto record this pass date. Consider running/skill-test auditto find the next spec gap." - After
spec [name]FAIL: "Review the failing assertions and update the skill or agent, or the test spec, to resolve the mismatch." - After
audit: "Start with the critical-priority gaps. Use the spec template atCCGS Skill Testing Framework/templates/skill-test-spec.md(agents:agent-test-spec.md) to create new specs."
How can the creator link this skill?
Add the canonical catalog link to the repository README so users can inspect current installs and available audits. The publishing guide covers the complete discovery path.
<a href="https://skillzs.dev/skills/donchitos/claude-code-game-studios/skill-test">View skill-test on skillZs</a>