What is pi-lens CLAUDE.md?

Project instructions for AI assistants working on the pi-lens codebase. They define required build, testing, version-control, changelog, and pull-request practices.

Building before tests, proving regression tests fail before a fix, updating changelog fragments, running the right test scope, and checking that pushed pull requests actually run tests and linting.

They prevent common mistakes such as testing outdated compiled code, hiding changes with git stash, or creating incomplete pull requests.

How apmantza/pi-lens configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to apmantza/pi-lens. 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/apmantza/pi-lens/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/apmantza/pi-lens

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/apmantza/pi-lens/claude-md/github.svg)](https://agentmods.dev/instructions/apmantza/pi-lens/claude-md)

Your own site

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

Per session 261 This file is loaded in full into every session.

When invoked 261 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	$0.00261	$0.00261
Opus 5.5	$0.00104	$0.00104
Sonnet 5.5	$0.00052	$0.00052
Haiku 4.5	$0.00026	$0.00026

Measured 6d ago against content hash ab254453227c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pi-lens 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 6d 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 · 18 lines

What it actually says

CLAUDE.md

Read the engineering principles (in your global instructions; vendored at docs/engineering-principles.md), then the contract, AGENTS.md, starting with its "Recurring defect shapes" index and the entries it points at (docs/defect-shapes.md); the standing invariants live under docs/invariants/. Claude Code does not load AGENTS.md automatically; this file carries only what precedes that read.

npm run build before any test run; tests execute the compiled twins (npm run build:dist too for the census files that read dist/).
scripts/hooks/guard-bash.mjs (PreToolUse) denies writing git stash forms (git stash list / show pass), hook bypasses, and the rest of AGENTS.md "Contributing". Fix the command; never route around it.
Role contracts are docs/pi-lens-*.md, the only home of role rules; .claude/agents/ holds thin Claude wrappers, .claude/skills/ the retro procedure, and docs/pi-lens-merge-policy.md the merge policy.

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.

6d ago Changed · +12 tokens per session ab254453227c
10d ago Changed · +2 lines · +30 tokens per session 8e9fc70cbcb0
23d ago Changed · +1 lines · +20 tokens per session c30a95749d4d
1mo ago Changed · -26 lines · -364 tokens per session b8019101ff0a
1mo ago Changed · +2 lines · +36 tokens per session 7e0194ba5404
1mo ago Changed · +2 lines · +36 tokens per session 041038626ef5
1mo ago Changed · +2 lines · +43 tokens per session 42c2483abbda
2mo ago First seen · 35 lines · 448 tokens per session scan A d874c105e395

Subscribe to this mod's changes

pi-lens CLAUDE.md is an instructions file published in the GitHub repository apmantza/pi-lens (514 stars, last pushed yesterday), licensed MIT. It adds 261 tokens to every session, about $0.0010 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.

pi-lens CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
pi-lens CLAUDE.mdapmantza/pi-lens	Instructions file	514	yesterday	MIT	A	261	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	yesterday	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

pi-lens: Instructions file for Claude Code