setup-rules-ex

setup-rules-ex is a skill for Claude Code, Codex from atman-33/workhub. It costs 49 tokens per session (612 once invoked), scanned A, original, MIT.

A setup helper for an extended-rules system that adds project-specific instructions when files in a designated rules folder are accessed. It creates an authoring guide and README if they are missing.

In plain words
What is it for?
Setting up .claude/rules-ex/, creating its authoring instructions and README, and explaining how those extended rules are maintained.
Why use it?
It gives developers a known place and documented process for writing extra rules. Existing files are preserved instead of being overwritten.

Skill for Claude CodeCodex

Part of the engineering plugin — 21 skills, 4 agents, 3 hooks, 2 MCP servers 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/atman-33/workhub/setup-rules-ex
Any agent
npx skills add atman-33/workhub --skill setup-rules-ex
Clone the repo
git clone --depth 1 https://github.com/atman-33/workhub

Made for: Claude Code, Codex.

Or install engineering, the plugin that ships this one along with the rest of its 21 skills, 4 agents, 3 hooks, 2 MCP servers.

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 setup-rules-ex

README.md
[![agentmods](https://agentmods.dev/badge/skills/atman-33/workhub/setup-rules-ex.svg)](https://agentmods.dev/skills/atman-33/workhub/setup-rules-ex)
Your own site
<a href="https://agentmods.dev/skills/atman-33/workhub/setup-rules-ex"><img src="https://agentmods.dev/badge/skills/atman-33/workhub/setup-rules-ex.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 612 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00612
Opus 5 $0.00024 $0.00306
Sonnet 5 $0.00010 $0.00122
Haiku 4.5 $0.00005 $0.00061

Measured 3d ago against content hash df24f096c30c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

setup-rules-ex 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 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.

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.

plugins/engineering/skills/setup-rules-ex/SKILL.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Scaffold the two files that enable the rules-ex extended-rules system for this project. Both files are templates — they will not be overwritten if they already exist. The canonical template content lives in this skill's assets/templates/ folder (also used by the setup-all skill's Phase 4 — treat it as the single source of truth and edit it there, not inline in either SKILL.md).

What gets created:

  • .claude/rules/rules-ex-authoring.md — a native path-scoped rule that auto-injects an authoring guide whenever you Read/Edit a file under .claude/rules-ex/. Required so the guide fires for the current repo (native .claude/rules files only govern the repo they live in).
  • .claude/rules-ex/README.md — explains what the rules-ex folder is and how to author rules in it. Has no paths: front matter intentionally, so the hook ignores it.

Steps

  1. Read .claude/rules/rules-ex-authoring.md.

    • If it already exists, display its path and current contents, then note it was left unchanged.
    • If it does not exist, read assets/templates/rules-ex-authoring.md (in this skill's folder) and write its exact contents to .claude/rules/rules-ex-authoring.md.
  2. Read .claude/rules-ex/README.md.

    • If it already exists, display its path and current contents, then note it was left unchanged.
    • If it does not exist, read assets/templates/rules-ex-readme.md (in this skill's folder) and write its exact contents to .claude/rules-ex/README.md.

Output Format

Print a summary table after completing both steps:

File Status
.claude/rules/rules-ex-authoring.md created / already existed
.claude/rules-ex/README.md created / already existed

Then remind the user:

  • Add your own cross-cutting rules as *.md files under .claude/rules-ex/. Each file must have a paths: front matter (workspace-relative globs) — see the authoring guide that auto-injects when you edit files there.
  • The inject-extended-rules hook fires on Read/Edit/Write; rules take effect immediately in the current session without a restart.

Read the full file on GitHub · 57 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. 3d ago First seen · 57 lines · 49 tokens per session scan A df24f096c30c

Subscribe to this mod's changes

setup-rules-ex is a skill published in the GitHub repository atman-33/workhub (2 stars, last pushed today), licensed MIT. It adds 49 tokens to every session and 612 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 2026-08-31.

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