Create Claude Code skills with best practices, structure, validation, and testing. Use when designing or refining skills, prompts, references, or supporting files.

2026-04-271

artifact-analysis

AcidicSoil/beagle

Use when the user wants a cited, structured read of local documents and project knowledge. Triggers on: "analyze these docs", "scan my project for context", "read the docs folder", "summarize what's in .beagle/concepts/", "extract context from docs/", "what's in this folder", "go read everything in X and tell me what's there". Also invoked programmatically by other beagle skills (prfaq-beagle Ignition, brainstorm-beagle reference points, strategy-interview context grounding) via the companion contract. Does NOT trigger on codebase lookups ("find this function", "search the repo"), web research (use web-research), LLM-as-judge evaluation (use llm-judge), or document editing (use humanize-beagle). Produces a written scan plan, parallel-subagent findings, and a cited synthesis report on disk — never inline prose, never unsourced claims.

2026-04-181

brainstorm-beagle

AcidicSoil/beagle

Use when the user has a fuzzy idea and wants to shape it into a concrete project spec before planning or building. Triggers on: "brainstorm this", "I have an idea for...", "help me think through this project", "what should I build", "spec this out". Also catches vague feature descriptions needing structured questioning to clarify scope. Does NOT write code, plan implementation, review strategy docs, or run strategy interviews — produces a WHAT/WHY spec through dialogue, not a HOW plan.

2026-04-181

prfaq-beagle

AcidicSoil/beagle

Use when the user wants to pressure-test a product, internal-tool, or OSS concept against Amazon's Working Backwards PRFAQ gauntlet before committing to a spec. Triggers on: "work backwards", "write a PRFAQ", "press release first", "is this idea worth building", "pressure-test this concept", "filter this before brainstorm", "is this a real product". Also catches solution-first pitches ("I want to build X that does Y") and technology-first pitches ("use AI to...") that need customer-first filtering. Produces a binary pass/fail verdict, not a polished doc. Hardcore coaching — direct, skeptical, concrete. On pass, hands off to brainstorm-beagle with a concept brief. Does NOT write code, plan implementation, scaffold projects, or draft specs.

2026-04-181

web-research

AcidicSoil/beagle

Use when the user wants web research: gathering cited, multi-angle evidence on a specific question. Triggers on: "research X for me", "do web research on", "look up sources for", "find citations for", "gather evidence on", "what does the web say about X". Also invoked programmatically by other beagle skills (prfaq-beagle Ignition, brainstorm-beagle reference points, strategy-interview context grounding) via the companion contract. Does NOT trigger on codebase lookups ("find this function", "search the repo"), local file search, LLM-as-judge evaluation, or paywalled/auth-gated scraping. Produces a written plan, parallel-subagent findings, and a cited synthesis report on disk — never inline prose, never unsourced claims.

2026-04-181

gen-release-notes

AcidicSoil/beagle

generate release notes for changes since a given tag

2026-04-181

description	Execute YAML test plan, stop on first failure, output rich debug prompt
name	run-test-plan
disable-model-invocation	true

Run Test Plan

Execute a YAML test plan, run setup commands, health checks, and each test sequentially. Stop on first failure with rich debug output.

Prerequisites

agent-browser skill: Browser tests require the agent-browser:agent-browser skill to be available

Arguments

--plan <path>: Path to test plan (default: docs/testing/test-plan.yaml)
--skip-setup: Skip setup commands and health checks (for re-running after failure)

Step 1: Parse Test Plan

Read and validate the test plan:

# Check file exists
ls docs/testing/test-plan.yaml || { echo "Error: Test plan not found"; exit 1; }

# Validate YAML
python3 -c "import yaml; yaml.safe_load(open('docs/testing/test-plan.yaml'))" || { echo "Error: Invalid YAML"; exit 1; }

Extract from the YAML:

setup.commands: List of setup commands
setup.health_checks: List of URLs to poll
tests: Array of test cases

Step 2: Run Setup (unless --skip-setup)

2a. Check Prerequisites

If setup.prerequisites exists, verify each one:

# For each prerequisite in setup.prerequisites
<prerequisite.check> || { echo "Prerequisite not met: <prerequisite.name>"; exit 1; }

2b. Set Environment Variables

If setup.env exists, export each variable. Variables using ${VAR} syntax should be resolved from the current environment:

# For each key/value in setup.env
export <key>="<value>"

2c. Build

If setup.build exists, execute build commands sequentially:

# For each command in setup.build
<command> || { echo "Build failed: <command>"; exit 1; }

2d. Start Services

If setup.services exists, start long-running processes and wait for health checks:

# For each service in setup.services
nohup <service.command> > .beagle/service-<index>.log 2>&1 &
echo $! > .beagle/service-<index>.pid

For each service with a health_check, poll until ready:

timeout=<service.health_check.timeout or 30>
url=<service.health_check.url>
elapsed=0

while [ $elapsed -lt $timeout ]; do
  if curl -s -o /dev/null -w "%{http_code}" "$url" | grep -qE "^(200|301|302)"; then
    echo "✓ Health check passed: $url"
    break
  fi
  sleep 2
  elapsed=$((elapsed + 2))
done

if [ $elapsed -ge $timeout ]; then
  echo "✗ Health check timeout: $url"
  exit 1
fi

2e. Legacy Setup Format

If the plan uses the older flat format (setup.commands + setup.health_checks instead of prerequisites/build/services), fall back to executing setup.commands sequentially and polling setup.health_checks as before.

Step 4: Execute Tests Sequentially

For each test in the plan:

4a. Log Test Start

## Running: TC-XX - <test.name>

Context: <test.context>

4b. Execute Steps

For each step in test.steps, determine the step type and execute accordingly:

Shell commands (run: steps):

The most common step type. Execute the command via Bash and capture stdout, stderr, and exit code:

# Execute the command, capture output and exit code
<command> 2>&1
echo "EXIT_CODE: $?"

Capture all output for evaluation in step 4c. Shell steps cover:

CLI binary invocations (e.g., ./target/debug/myapp status --all)
Database queries (e.g., psql "${DATABASE_URL}" -c "SELECT ...")
File inspection (e.g., ls -la /path/to/expected/output)
Process lifecycle checks (e.g., timeout 5 ./myapp 2>&1 || true)
Any other command a human would type in a terminal

curl actions (action: curl steps):

curl -X <method> \
  -H "Content-Type: application/json" \
  <additional headers> \
  -d '<body>' \
  "<url>" \
  -o response.json \
  -w "%{http_code}" > status_code.txt

# Capture response for evaluation
cat response.json
cat status_code.txt

agent-browser CLI actions:

Steps starting with agent-browser are browser automation commands:

# Navigate
agent-browser open <url>

# Snapshot interactive elements (always do before interacting)
agent-browser snapshot -i

# Interact using refs from snapshot output (@e1, @e2, etc.)
agent-browser fill @<ref> "<value>"
agent-browser click @<ref>

# Wait for conditions
agent-browser wait --url "<pattern>"
agent-browser wait --text "<text>"
agent-browser wait --load networkidle

# Capture evidence
agent-browser screenshot docs/testing/evidence/<test.id>.png

Important: Always run agent-browser snapshot -i before interacting with elements to get valid refs, and re-snapshot after navigation or significant DOM changes.

Save screenshots to docs/testing/evidence/<test.id>.png

4c. Evaluate Result

Using agent reasoning, compare actual outcome against test.expected:

Read the expected behavior description
Compare with actual response/screenshot
Determine PASS or FAIL

4d. On PASS

✓ TC-XX PASSED: <test.name>

Continue to next test.

4e. On FAIL

Stop immediately. Go to Step 6.

Step 5: On All Tests Pass

## Test Results: ALL PASSED

| ID | Name | Result |
|----|------|--------|
| TC-01 | <name> | ✓ PASS |
| TC-02 | <name> | ✓ PASS |
| ... | ... | ... |

**Total:** N/N tests passed

### Evidence

Screenshots saved to `docs/testing/evidence/`

### Cleanup

Stopping background services...

Clean up:

# Kill background services
for pidfile in .beagle/service-*.pid .beagle/dev-server.pid; do
  if [ -f "$pidfile" ]; then
    kill $(cat "$pidfile") 2>/dev/null
    rm "$pidfile"
  fi
done

Step 6: On Failure - Generate Debug Prompt

When a test fails, generate rich debug output:

6a. Gather Context

# Get changed files relevant to the failure
git diff --name-only $(git merge-base HEAD origin/main)..HEAD

# Get recent changes in files mentioned in test.context
git diff $(git merge-base HEAD origin/main)..HEAD -- <relevant_files>

6b. Output Debug Report

## Test Failure: TC-XX - <test.name>

### What Failed

**Test:** <test.name>
**Expected:**
<test.expected>

**Actual:**
<Describe what actually happened - response code, error message, screenshot description>

### Relevant Changes in This PR

<For each file mentioned in test.context or related to the failure:>
- `<file>` (lines X-Y) - <brief description of changes>

### Evidence

<If screenshot exists:>
- Screenshot: `docs/testing/evidence/<test.id>.png`

<If API response:>
- Status code: <code>
- Response body:
```json
<response>

Error Details

``` ```

Suggested Investigation

<Third thing about environment/setup>

Debug Session Prompt

Copy this to start a new Claude session:

I'm debugging a test failure in branch <branch>.

Test: <test.name> Error:

Relevant files:

Help me investigate why .


### 6c. Preserve Evidence

```bash
# Ensure evidence directory exists
mkdir -p docs/testing/evidence

# Save failure context
cat > docs/testing/evidence/<test.id>-failure.md << 'EOF'
# Failure Report: <test.id>

<Full debug report content>
EOF

6d. Cleanup and Exit

# Kill background services
for pidfile in .beagle/service-*.pid .beagle/dev-server.pid; do
  if [ -f "$pidfile" ]; then
    kill $(cat "$pidfile") 2>/dev/null
    rm "$pidfile"
  fi
done

Test Results Summary Table

Always output a summary table showing progress:

## Test Results

| ID | Name | Result |
|----|------|--------|
| TC-01 | <name> | ✓ PASS |
| TC-02 | <name> | ✗ FAIL |
| TC-03 | <name> | - SKIP |

**Passed:** 1/3
**Failed:** TC-02

Tests after a failure are marked as SKIP (not executed).

Verification

Before completing:

# Verify evidence directory exists
ls -la docs/testing/evidence/

# List captured evidence
ls docs/testing/evidence/*.png docs/testing/evidence/*.md 2>/dev/null

Verification Checklist:

Setup commands executed successfully
Health checks passed before test execution
Each executed test has recorded result
Evidence captured in docs/testing/evidence/
On failure: debug prompt includes expected vs actual
On failure: relevant PR changes listed
Background processes cleaned up

Rules

Stop on first test failure (do not continue to other tests)
Always capture evidence (screenshots, responses)
Include file:line references in debug prompts when possible
Use --skip-setup flag to re-run after fixing issues
Never hardcode secrets - use environment variables
Clean up background processes even on failure
Preserve failure evidence for debugging
Make debug prompts copy-paste ready for new sessions