What is p3a CLAUDE.md?

A project instruction file containing Claude Code notes for an embedded-systems project using ESP-IDF, Espressif's development framework.

Use it when building the project with IDF tools, especially when setting the version, loading the environment, and choosing the repository directory.

It prevents environment and working-directory mistakes that can create builds in the wrong place or use the wrong ESP-IDF setup.

How fabkury/p3a configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to fabkury/p3a. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/fabkury/p3a/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/fabkury/p3a

Made for: Claude Code.

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/instructions/fabkury/p3a/claude-md/github.svg)](https://agentmods.dev/instructions/fabkury/p3a/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/fabkury/p3a/claude-md"><img src="https://agentmods.dev/badge/instructions/fabkury/p3a/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/fabkury/p3a/claude-md"><img src="https://agentmods.dev/badge/instructions/fabkury/p3a/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 196 This file is loaded in full into every session.

When invoked 196 The same file — it is already loaded in full.

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	$0.00196	$0.00196
Opus 5.5	$0.00078	$0.00078
Sonnet 5.5	$0.00039	$0.00039
Haiku 4.5	$0.00020	$0.00020

Measured 2mo ago against content hash c0c972830d4b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

p3a 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.

CLAUDE.md · 19 lines

What it actually says

CLAUDE.md

@AGENTS.md

Claude Code notes

Project guidance lives in AGENTS.md, imported above. Edit that file when the repository's conventions change. This section holds only what is specific to the Claude Code harness.

The Bash and PowerShell tools share one persistent working directory across calls, but shell state (environment variables, the activated IDF profile) does not persist. A cd in an earlier call silently moves a later idf.py invocation. When the user asks for a build, do the whole sequence in one command: set PYTHONUTF8, dot-source the IDF profile, set ESP_IDF_VERSION, Set-Location to the repo root, then idf.py. The symptom of drift is "Running cmake in directory ...\components<name>\build" and a stray build/ inside that component.

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.

2mo ago Changed · -87 lines · -1,502 tokens per session c0c972830d4b
2mo ago First seen · 106 lines · 1,698 tokens per session scan A da2b3c511d46

Subscribe to this mod's changes

p3a CLAUDE.md is an instructions file published in the GitHub repository fabkury/p3a (101 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 196 tokens to every session, about $0.0008 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 2026-09-01.

DevOps and cloud Hardware and IoT art embedded esp32 esp32-p4 pico-8 pixel-art

p3a CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
p3a CLAUDE.mdfabkury/p3a	Instructions file	101	1mo ago	Apache-2.0	A	196	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

p3a: Instructions file for Claude Code