What is openpi AGENTS.md?

Project rules for OpenPi, a local desktop workbench that hosts and displays the Pi coding agent.

Use them when proposing or implementing OpenPi features involving its desktop interface, Pi sessions, tools, Git, editor, or terminal.

They define OpenPi’s intended scope, supporting documents, and preferred Pi SDK integration so changes do not turn it into a different product.

How heyhuynhgiabuu/openpi configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to heyhuynhgiabuu/openpi. 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/heyhuynhgiabuu/openpi/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/heyhuynhgiabuu/openpi

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/heyhuynhgiabuu/openpi/agents-md/github.svg)](https://agentmods.dev/instructions/heyhuynhgiabuu/openpi/agents-md)

Your own site

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

Per session 3,302 This file is loaded in full into every session.

When invoked 3,302 The same file — it is already loaded in full.

Security scan A 1 finding. 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	$0.03302	$0.03302
Opus 5.5	$0.01321	$0.01321
Sonnet 5.5	$0.00660	$0.00660
Haiku 4.5	$0.00330	$0.00330

Measured 10d ago against content hash 6cc6f20d95eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

openpi AGENTS.md scanned grade A with 1 finding 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 10d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

**Electron main owns desktop authority:** app/window lifecycle, secure IPC (sender validation), the Pi session host, PTY lifecycle, permission gates before any mutation-capable action, **all Git operations** (via `simple

AGENTS.md · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenPi Project Rules

Purpose: Operating rules for building OpenPi: a desktop workbench for the Pi coding agent. Audience: human developers and AI coding agents. Related surfaces: ROADMAP.md (philosophy, phases, non-goals), STATUS.md (current status), node_modules/@earendil-works/pi-coding-agent/ (installed SDK; canonical docs table below).

Product Direction

OpenPi is a local-first desktop workbench for Pi (@earendil-works/pi-coding-agent, upstream earendil-works/pi by Mario Zechner). Electron main hosts the MIT agent and renders sessions, tools, Git, editor, and terminal. OpenPi is a workbench, not an agent runtime and not a full IDE.

Direction (owner decision 2026-10-27, #33): the agent runtime migrates to @earendil-works/pi-durable (first-party, ROADMAP Phase 8), then staged remote surfaces ship: SSH + a PWA mobile client, read-only → approvals → prompt (Phase 9). The phone is an untrusted client — never the host, never runs the agent. Security requirements in docs/decisions/2026-09-13-remote-access-deferred.md stay binding; sequencing in docs/decisions/2026-10-27-durable-runtime-remote-surfaces.md.

Pi is intentionally minimal (small prompt, four core tools, YOLO by default). Plan mode, todos, permission gates, and sub-agents stay out of core — they belong in user extensions. MCP, codemode, and tool-search are built-in extensions: surface them through the SDK, never reimplement or wrap them. OpenPi adds inspectability (UI, tokens, Git/diff) and optional desktop policy (protected paths, high-risk confirms in main). Treat the human as the quality gate.

Delegation: use the @heyhuynhgiabuu/pi-task package. OpenPi registers no built-in Agent customTools; .pi/extensions/openpi-task-guard.ts strips invalid IDs. task_id must be a pi-task-generated short ID; conversation_id may be any caller-chosen name. Full UUIDs are rejected as task_id.

Read the full file on GitHub · 181 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.

10d ago Changed · -245 lines · -2,804 tokens per session scan B → A 6cc6f20d95eb
29d ago Changed · +1 lines · +74 tokens per session f2424436076c
1mo ago Changed · +99 tokens per session dbe612b42290
1mo ago Changed · +2 lines · +119 tokens per session a7cdd40a8646
2mo ago First seen · 423 lines · 5,814 tokens per session scan B 42a98f4d0ca2

Subscribe to this mod's changes

openpi AGENTS.md is an instructions file published in the GitHub repository heyhuynhgiabuu/openpi (221 stars, last pushed 5d ago), licensed MIT. It adds 3,302 tokens to every session, about $0.0132 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents

openpi AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
openpi AGENTS.mdheyhuynhgiabuu/openpi	Instructions file	221	5d ago	MIT	A	3,302	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	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

openpi: Instructions file for Codex