Woz Benchmark Agent Skill

WOZCODE Savings Benchmark

Run a side-by-side comparison of WOZCODE vs vanilla Claude Code on the user's own codebase. Each prompt runs twice against a fresh copy of the repo with git reset --hard between runs, so the target MUST be a clean git repo.

TRIGGER: "compare woz", "how much does woz save", "benchmark woz", "woz vs claude", "show me the savings", "is woz worth it", or /woz-benchmark.

Prerequisites

• User logged in to WOZCODE.
• Target directory is a git repo with a clean working tree.

Steps

1. Gather inputs — BE BRIEF

Ask for all three in ONE short message (< 10 lines). Do not re-explain what the benchmark does — the user already invoked it.

• Target directory — absolute path to a clean git repo to run the test on.
• Prompts — 2–10 real coding tasks. Tell them briefly: "meaty feature/refactor/bugfix work, not one-liners — trivial prompts hide WOZCODE's advantage". If they don't have prompts in mind, offer to suggest some after looking at their repo.
• Environment setup (optional) — one line: "Anything Claude needs already in place (DB seeded, services running, credentials in .env)? Skip if the repo is self-contained."

Do NOT ask about the model. Default to opus in the YAML config. Only switch to sonnet or haiku if the user volunteers a different choice in their answer.

2. Validate the target

Before writing any config, verify the target is usable:

test -d <target>
git -C <target> rev-parse --git-dir
git -C <target> status --porcelain

If the directory doesn't exist, isn't a git repo, or has uncommitted changes, STOP and tell the user how to fix it.

3. Write a temporary benchmark config

Use the Write tool to create a YAML file at /tmp/woz-benchmark-<timestamp>.yaml (get the timestamp from date +%s). Format:

model: opus
maxTurns: 15
prompts:
  - "first prompt from the user"
  - "second prompt from the user"
setup:
  commands:
    - "curl -L https://example.com/dataset.csv -o data/sample.csv"
    - "psql $DATABASE_URL -f seed.sql"

Omit the entire setup: block if the user didn't give any environment setup commands.

4. Run the benchmark

One-line warning: "This'll take several minutes — each prompt runs twice." Then run:

node "${CODEX_HOME:-$HOME/.codex}/plugins/wozcode/scripts/benchmark.js" --target <target> --config <yaml-path> --user-env

--user-env loads the user's project CLAUDE.md hierarchy on BOTH sides. Do NOT pass --screenshots, --codex, --judge, or --trace.

5. Present the results as a savings report

The benchmark prints a detailed text report at the end. Relay the full report to the user, then add a clear, sales-oriented savings summary at the top. Compute the deltas from the report's totals.