Borrowing it
Nothing to install: this file belongs to infews/pxp_skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/infews/pxp_skill/main/CLAUDE.mdgit clone --depth 1 https://github.com/infews/pxp_skillWrote 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.
[](https://agentmods.dev/instructions/infews/pxp_skill/claude-md)<a href="https://agentmods.dev/instructions/infews/pxp_skill/claude-md"><img src="https://agentmods.dev/badge/instructions/infews/pxp_skill/claude-md/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.
<a href="https://agentmods.dev/instructions/infews/pxp_skill/claude-md"><img src="https://agentmods.dev/badge/instructions/infews/pxp_skill/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00754 | $0.00754 |
| Opus 5.5 | $0.00302 | $0.00302 |
| Sonnet 5.5 | $0.00151 | $0.00151 |
| Haiku 4.5 | $0.00075 | $0.00075 |
Grade A, and why
pxp_skill CLAUDE.md 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
What this repo is
pxp is a Claude Code plugin. The plugin manifest lives at .claude-plugin/plugin.json. It ships three skills under skills/ that work together to support a Pivotal Labs–style XP pairing workflow: epic refinement → story slicing → EARS specs → TDD.
This is a pure-markdown repo. There are no build steps, no test suite, and no package manager.
Skill architecture
skills/
pivotal-xp/ — main workflow skill (5-phase XP cycle)
ears-specifications/ — sub-skill for EARS pattern reference
test-driven-development/ — bundled fallback TDD sub-skill
Each skill is a directory containing SKILL.md (with YAML frontmatter) and optional subdirectories. The pivotal-xp skill also has a templates/ directory with epic.md and story.md starters.
How the skills relate
pivotal-xp is the orchestrator. In Phase 3 it requires pxp:ears-specifications as a sub-skill. In Phase 4 it requires a TDD skill via a fallback chain:
superpowers-ruby:test-driven-development— preferred if the user has itsuperpowers:test-driven-development— second choicepxp:test-driven-development— the bundled copy in this package (last resort)
This package must work standalone for users without any superpowers plugin installed. The bundled test-driven-development skill is the safety net — it should never be the primary recommendation in external contexts.
Rule for all future cross-skill references: external/upstream first, local bundled copy last.
Skill frontmatter
Every SKILL.md begins with a YAML frontmatter block:
---
name: skill-name
description: When to trigger this skill (used by Claude Code for automatic matching)
---
The description field is what Claude Code reads to decide when to invoke the skill. It should describe the trigger conditions precisely — too broad causes false positives, too narrow misses valid uses.
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.
- 2mo ago First seen · 61 lines · 754 tokens per session scan A d7916f0bf2a2
pxp_skill CLAUDE.md is an instructions file published in the GitHub repository infews/pxp_skill (21 stars, last pushed 4mo ago), licensed MIT. It adds 754 tokens to every session, about $0.0030 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 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.