cw-spec

cw-spec is a skill for Claude Code, Codex from sighup/claude-workflow. It costs 43 tokens per session (3,705 once invoked), scanned B, original, no licence file.

A specification-writing workflow that turns a new feature idea into demoable units, functional requirements, and definitions of proof. A specification is a written description of what should be built and how it will be checked.

In plain words
What is it for?
Use it when starting a feature to define its behavior, break it into demonstrable parts, and decide what evidence will prove it works.
Why use it?
It clarifies the expected work before coding begins and makes later verification more concrete.

Skill for Claude CodeCodex

Part of the claude-workflow plugin — 13 skills, 10 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/sighup/claude-workflow/cw-spec
Any agent
npx skills add sighup/claude-workflow --skill cw-spec
Clone the repo
git clone --depth 1 https://github.com/sighup/claude-workflow

Made for: Claude Code, Codex.

Or install claude-workflow, the plugin that ships this one along with the rest of its 13 skills, 10 agents, 1 hook.

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 cw-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/sighup/claude-workflow/cw-spec.svg)](https://agentmods.dev/skills/sighup/claude-workflow/cw-spec)
Your own site
<a href="https://agentmods.dev/skills/sighup/claude-workflow/cw-spec"><img src="https://agentmods.dev/badge/skills/sighup/claude-workflow/cw-spec.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,705 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
Origin unknown 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 $0.00043 $0.03705
Opus 5 $0.00022 $0.01852
Sonnet 5 $0.00009 $0.00741
Haiku 4.5 $0.00004 $0.00370

Measured 5d ago against content hash 96424a7dc9d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade B, and why

cw-spec scanned grade B with 2 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 5d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

pwd | grep -qE '(\.claude/worktrees|/\.worktrees)/' && echo "IN_WORKTREE"

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

| CLI | `CLI: [command] returns [expected]` | `CLI: curl /health returns {"status":"ok"}` |
plugin/skills/cw-spec/SKILL.md · 402 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file 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. 5d ago First seen · 402 lines · 43 tokens per session scan B 96424a7dc9d4

Subscribe to this mod's changes

cw-spec is a skill published in the GitHub repository sighup/claude-workflow (15 stars, last pushed 1mo ago), with no licence file. It adds 43 tokens to every session and 3,705 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.