What is pi-extensions AGENTS.md?

A set of instructions for working on pi-extensions, an npm workspace repository containing several Pi extensions. It explains the repository layout, package-specific rules, commands, tests, and documentation conventions.

Use it when changing a Pi extension, running its commands or tests, or updating its README and other documentation.

It helps a coding agent work in the correct package and follow that package’s established structure and rules.

How MattDevy/pi-extensions configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to MattDevy/pi-extensions. 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/MattDevy/pi-extensions/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/MattDevy/pi-extensions

Made for: Codex, OpenCode.

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/mattdevy/pi-extensions/agents-md/github.svg)](https://agentmods.dev/instructions/mattdevy/pi-extensions/agents-md)

Your own site

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

Per session 778 This file is loaded in full into every session.

When invoked 778 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	$0.00778	$0.00778
Opus 5.5	$0.00311	$0.00311
Sonnet 5.5	$0.00156	$0.00156
Haiku 4.5	$0.00078	$0.00078

Measured 2mo ago against content hash c8398e21b89d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pi-extensions AGENTS.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.

AGENTS.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

pi-extensions

This is an npm workspaces monorepo. All Pi extensions live under packages/. Each package has its own AGENTS.md with package-specific conventions and directory structure.

Repository structure

packages/
  pi-continuous-learning/   # Pi extension: continuous learning via instincts
    src/                    # TypeScript source + tests (*.test.ts alongside source)
    docs/                   # Package documentation (internals.md, specification.md)
    AGENTS.md               # Package-level conventions, directory structure, testing
    CHANGELOG.md            # Release history (managed by release-please)
  pi-red-green/             # Pi extension: TDD enforcement (red-green-refactor)
    src/                    # TypeScript source + tests (*.test.ts alongside source)
    CHANGELOG.md            # Release history (managed by release-please)
  pi-compass/               # Pi extension: codebase navigation (codemap + code tours)
    src/                    # TypeScript source + tests (*.test.ts alongside source)
    CHANGELOG.md            # Release history (managed by release-please)
  pi-simplify/              # Pi extension: code simplification (/simplify command)
    src/                    # TypeScript source + tests (*.test.ts alongside source)
    CHANGELOG.md            # Release history (managed by release-please)
  pi-code-review/           # Pi extension: automated language-aware code review
    src/                    # TypeScript source + tests (*.test.ts alongside source)
    CHANGELOG.md            # Release history (managed by release-please)
  pi-blueprint/             # Pi extension: multi-session planning with dependency tracking
    src/                    # TypeScript source + tests (*.test.ts alongside source)
    CHANGELOG.md            # Release history (managed by release-please)

Commands (run from repo root)

After ANY code change, run the full check:

npm run check

Individual commands:

npm test                                                       # run all package tests
npm test -w packages/pi-continuous-learning -- src/foo.test.ts # single file
npm test -w packages/pi-continuous-learning -- -t "pattern"    # by name pattern
npm run typecheck                                              # type-check all packages
npm run lint                                                   # ESLint on all packages
npm run build                                                  # compile all packages to dist/

Read the full file on GitHub · 73 lines

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 First seen · 73 lines · 778 tokens per session scan A c8398e21b89d

Subscribe to this mod's changes

pi-extensions AGENTS.md is an instructions file published in the GitHub repository MattDevy/pi-extensions (156 stars, last pushed 19d ago), licensed MIT. It adds 778 tokens to every session, about $0.0031 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.

LLM Memory and context Writing and docs ai pi-coding-agent pi-extension pi-extensions

pi-extensions AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
pi-extensions AGENTS.mdMattDevy/pi-extensions	Instructions file	156	19d ago	MIT	A	778	Codex, OpenCode
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

pi-extensions: Instructions file for Codex