wf-ralph

wf-ralph is a skill for Claude Code, Codex from marchatton/agent-skills. It costs 44 tokens per session (1,424 once invoked), scanned A, original, MIT.

A guide for running Ralph, a command-line loop that handles one development, research, testing, or review task at a time from a project plan.

In plain words
What is it for?
Use it with Ralph project-plan files for development, research, end-to-end testing, review, or generating a project plan.
Why use it?
It provides a repeatable way to discover the right task, work in small iterations, verify progress, and optionally commit the result.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions Codex; $skill-name invocation.

Good fit Use it with Ralph project-plan files for development, research, end-to-end testing, review, or generating a project plan.

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Install with agentmods
npx agentmods add skills/marchatton/agent-skills/wf-ralph
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.

Any agent
npx skills add marchatton/agent-skills --skill wf-ralph
Clone the repo
git clone --depth 1 https://github.com/marchatton/agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for wf-ralph

README.md
[![agentmods](https://agentmods.dev/badge/skills/marchatton/agent-skills/wf-ralph/github.svg)](https://agentmods.dev/skills/marchatton/agent-skills/wf-ralph)
Your own site
<a href="https://agentmods.dev/skills/marchatton/agent-skills/wf-ralph"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/wf-ralph/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for wf-ralph

Your own site · 80×15
<a href="https://agentmods.dev/skills/marchatton/agent-skills/wf-ralph"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/wf-ralph.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,424 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00044 $0.01424
Opus 5 $0.00022 $0.00712
Sonnet 5 $0.00009 $0.00285
Haiku 4.5 $0.00004 $0.00142

Measured 7d ago against content hash c7c0039bef90, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

wf-ralph scanned grade A with 0 findings 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 7d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/04-develop/wf-ralph/SKILL.md · 180 lines

How it starts

The opening of the file, as written. The whole thing — 180 lines — stays where its author put it; the contents beside it link to each section on GitHub.

wf-ralph

Purpose

Run a "Ralph loop" using the ralph CLI.

  • Keep the mental model: one story per iteration, frequent verification, small changes.
  • Default agent: Codex (YOLO) unless you override --agent.
  • Default task source: dossier-local Ralph PRD JSON (prd.json or prd-<slug>.json).
  • Browser testing: YES for UI stories (default skill: $dev-browser).

When to use

Use this skill when any of the following is true:

  • You want copy-paste-ready ralph commands for dev | research | e2e | review | prd-gen.
  • You have (or want) a dossier-local Ralph PRD JSON and need to run one iteration at a time.
  • You have an @slug and need to locate the PRD JSON under docs/04-projects/**.

Minimum questions

If any of these are missing, ask only these questions first (reply format at the end).

  1. Mode?
  • a) dev (default)
  • b) research
  • c) e2e
  • d) review
  • e) prd-gen
  1. PRD location?
  • a) Use ./prd.json if present (default)
  • b) pick from ./prd-*.json
  • c) @slug (search under docs/04-projects/**)
  • d) explicit path to PRD JSON
  1. Commit behavior?
  • a) Commit (default)
  • b) --no-commit

Reply shorthand:

  • defaults (accept all defaults)
  • or 1c 2c @bulk-invite-members 3b etc

Discovery

Determine repo root (required)

Run ralph from the repo root so .ralph/ state/logs land in the right place:

cd "$(git rev-parse --show-toplevel)"

Locate dossier PRD JSON (avoid brittle paths)

Ralph auto-discovery only scans .agents/tasks/*.json. For dossier-local PRDs, pass --prd explicitly.

Resolution order:

  1. If the current working directory contains prd.json, use it.
  2. Else if it contains prd-*.json:
  • if exactly one match, use it
  • if multiple matches, ask which to use
  1. Else accept either:
  • an @slug (dossier folder name contains the slug), or
  • a relative path to a dossier folder, or
  • an explicit path to a PRD JSON file
# Find PRDs and filter by slug
find docs/04-projects -type f \( -name 'prd.json' -o -name 'prd-*.json' \) | rg '<slug>'

# Example
find docs/04-projects -type f \( -name 'prd.json' -o -name 'prd-*.json' \) | rg 'bulk-invite-members'

Read the full file on GitHub · 180 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 7d ago First seen · 180 lines · 44 tokens per session scan A c7c0039bef90

Subscribe to this mod's changes

wf-ralph is a skill published in the GitHub repository marchatton/agent-skills (5 stars, last pushed 6mo ago), licensed MIT. It adds 44 tokens to every session and 1,424 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.