What is rigor-project-init?

A first-time setup workflow for Rigor, a tool that checks Ruby code's types and reports likely problems. It detects the project stack, selects plugins and an adoption mode, and writes the initial configuration and optional baseline.

It is for onboarding a project to Rigor and choosing whether to begin with a recorded set of existing findings or a stricter check.

It removes the manual work of starting Rigor on a project that has never used it.

rigor-project-init — Skill for Claude Code and Codex by rigortype

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 rigortype/rigor --skill rigor-project-init

Clone the repo

git clone --depth 1 https://github.com/rigortype/rigor

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/rigortype/rigor/rigor-project-init/github.svg)](https://agentmods.dev/skills/rigortype/rigor/rigor-project-init)

Your own site

<a href="https://agentmods.dev/skills/rigortype/rigor/rigor-project-init"><img src="https://agentmods.dev/badge/skills/rigortype/rigor/rigor-project-init/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/rigortype/rigor/rigor-project-init"><img src="https://agentmods.dev/badge/skills/rigortype/rigor/rigor-project-init.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,536 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.

Model	Per session	Once invoked
Fable 5.1	$0.00055	$0.04536
Opus 5.5	$0.00022	$0.01814
Sonnet 5.5	$0.00011	$0.00907
Haiku 4.5	$0.00006	$0.00454

Measured 11d ago against content hash ef7e5550f943, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rigor-project-init 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 11d 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.

skills/rigor-project-init/SKILL.md · 268 lines

How it starts

The opening of the file, as written. The whole thing — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rigor Project Init

End-to-end onboarding for a project that has never run Rigor. The output is a committed .rigor.dist.yml, an explicit adoption mode, and — if the project chooses it — a .rigor-baseline.yml snapshot.

This skill is for users adopting Rigor on their own project. It uses the published rigor executable, installed standalone — Rigor is a tool, not a library, so it does not go in the project's Gemfile. For the install channels (mise recommended) see the manual's Installing Rigor chapter — rigor docs manual/01-installation once any rigor is on PATH, or (pre-install) https://github.com/rigortype/rigor/blob/master/docs/manual/01-installation.md. This skill references only public CLI flags and config keys — the same surface rigor --help documents.

First: load the version-current copy

This skill's step detail lives in its references/ files, and its exact commands, flags, and config keys drift between Rigor releases — so follow the copy that ships with the installed Rigor rather than any vendored or frozen copy of this file. Get the complete current procedure (body + all references, inline) in one call:

rigor skill --full rigor-project-init

If you already loaded this skill via rigor skill you have the current copy — just proceed. If rigor is not on PATH, this task needs it: run rigor-next-steps to install Rigor first, then come back.

Phase 0 — When to use this skill

Trigger when the user says "set up Rigor here", "configure rigor for this app", "add type checking", or runs rigor check in a project that has no .rigor.yml / .rigor.dist.yml.

Do NOT trigger for:

An existing baseline the user wants to shrink — that is the rigor-baseline-reduce skill.
Writing a Rigor plugin for the project's own DSL / metaprogramming — that is the rigor-plugin-author skill. (This skill points at plugin authoring as an escalation in Phase 8; it does not do it.)
Tweaking an already-configured project — ordinary edits to an existing .rigor.yml; no onboarding pipeline needed.

Read the full file on GitHub · 268 lines

Files

What ships with it

6 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.

11d ago First seen · 268 lines · 55 tokens per session scan A ef7e5550f943

Subscribe to this mod's changes

rigor-project-init is a skill published in the GitHub repository rigortype/rigor (107 stars, last pushed today), licensed MPL-2.0. It adds 55 tokens to every session and 4,536 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-26.

Debugging

rigor-project-init next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
rigor-project-initrigortype/rigor	Skill	107	today	MPL-2.0	A	55	Claude Code, Codex
systematic-debuggingopen-metadata/OpenMetadata	Skill	16k	yesterday	Apache-2.0	A	37	Claude Code
log-error-digestzebbern/claude-code-guide	Skill	4.7k	3d ago	MIT	A	71	Claude Code, Codex
cwv-optimizeradobe/skills	Skill	319	yesterday	Apache-2.0	A	112	Claude Code
ci-fixersipyourdrink-ltd/bernstein	Skill	1.2k	yesterday	Apache-2.0	A	15	Claude Code, Codex
incident-response-incident-responsermyndharis/antigravity-skills	Skill	1.9k	23d ago	MIT	A	36	Claude Code
diagnosing-missing-recordingsPostHog/posthog	Skill	41k	today	none	A	76	Claude Code, Codex