dev:dry-run

dev:dry-run is a skill for Claude Code, Codex from raphaelchristi/harness-evolver. It costs 49 tokens per session (1,098 once invoked), scanned C, original, MIT.

A smoke-test procedure for checking whether the evolve pipeline works end to end. A smoke test is a quick check that the main parts of a system run and fit together.

In plain words
What is it for?
Use it to test the pipeline’s tools, verify their help commands, and check links between the pipeline’s skills and tools.
Why use it?
It catches broken Python syntax, invalid command-line options, and missing tool references before a full run. It can check locally without a LangSmith API key, or use LangSmith when one is available.

Skill for Claude CodeCodex

Part of the harness-evolver plugin — 9 skills, 6 agents, 1 hook shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/raphaelchristi/harness-evolver/dev-dry-run
Any agent
npx skills add raphaelchristi/harness-evolver --skill dev-dry-run
Clone the repo
git clone --depth 1 https://github.com/raphaelchristi/harness-evolver

Made for: Claude Code, Codex.

Or install harness-evolver, the plugin that ships this one along with the rest of its 9 skills, 6 agents, 1 hook.

Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,098 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00049 $0.01098
Opus 5 $0.00024 $0.00549
Sonnet 5 $0.00010 $0.00220
Haiku 4.5 $0.00005 $0.00110

Measured 3d ago against content hash b0e519fd1078, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

dev:dry-run scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf "$TMPDIR"
.claude/skills/dev-dry-run/SKILL.md · 144 lines

How it starts

The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/dev:dry-run

Smoke-test the evolve pipeline. Two modes depending on whether LANGSMITH_API_KEY is available.

Resolve Paths

TOOLS="${EVOLVER_TOOLS:-$([ -d "tools" ] && echo "tools" || echo "$HOME/.evolver/tools")}"
EVOLVER_PY="${EVOLVER_PY:-$([ -f "$HOME/.evolver/venv/bin/python" ] && echo "$HOME/.evolver/venv/bin/python" || echo "python3")}"

Check: Online or Offline?

if [ -n "$LANGSMITH_API_KEY" ]; then
    echo "MODE: Online (LANGSMITH_API_KEY found)"
    MODE="online"
else
    echo "MODE: Offline (no LANGSMITH_API_KEY)"
    MODE="offline"
fi

Offline Mode (no API key)

Validate tool syntax and argparse consistency:

echo "=== Tool Syntax Check ==="
for f in $TOOLS/*.py; do
    python3 -c "import ast; ast.parse(open('$f').read())" 2>&1
    if [ $? -eq 0 ]; then echo "OK: $(basename $f)"; else echo "FAIL: $(basename $f)"; fi
done

echo ""
echo "=== Argparse Flags Check ==="
for f in $TOOLS/*.py; do
    $EVOLVER_PY "$f" --help > /dev/null 2>&1
    if [ $? -eq 0 ]; then echo "OK: $(basename $f) --help"; else echo "FAIL: $(basename $f) --help"; fi
done

echo ""
echo "=== Skill Cross-Reference Check ==="
# Check every tool referenced in evolve skill exists
for TOOL in $(grep -oh '\$TOOLS/[a-z_]*.py' skills/evolve/SKILL.md | sed 's/\$TOOLS\///' | sort -u); do
    if [ -f "$TOOLS/$TOOL" ]; then
        echo "OK: $TOOL referenced and exists"
    else
        echo "FAIL: $TOOL referenced in evolve skill but not found"
    fi
done

Online Mode (with API key)

Run the full pipeline with a mock agent:

1. Create temp directory with mock agent

TMPDIR=$(mktemp -d)
cat > "$TMPDIR/agent.py" << 'PYEOF'
import json, sys
input_path = sys.argv[1] if len(sys.argv) > 1 else None
if input_path:
    with open(input_path) as f:
        data = json.load(f)
    question = data.get("input", data.get("question", ""))
    print(json.dumps({"output": f"Mock answer to: {question}"}))
else:
    print(json.dumps({"output": "No input provided"}))
PYEOF

cat > "$TMPDIR/test_inputs.json" << 'JSONEOF'
[
    {"input": "What is 2+2?"},
    {"input": "Name a color"},
    {"input": "What is Python?"}
]
JSONEOF
echo "Mock agent created at $TMPDIR"

Read the full file on GitHub · 144 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 144 lines · 49 tokens per session scan C b0e519fd1078

Subscribe to this mod's changes

dev:dry-run is a skill published in the GitHub repository raphaelchristi/harness-evolver (49 stars, last pushed 4mo ago), licensed MIT. It adds 49 tokens to every session and 1,098 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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