PCP: Instructions file for Codex

AGENTS.md

PCP AGENTS.md is an instructions file for Codex, OpenCode from IsoCodeCrafter/PCP. It costs 658 tokens per session, scanned A, a copy of PCP copilot-instructions.md, MIT.

A set of repository instructions for the Project Context Protocol, a way to keep architecture, decisions, domain rules, open work, and operating guidance available to human and AI contributors.

In plain words
What is it for?
Use it to find the canonical project context, review recent architecture decisions, understand constraints, and follow the repository's contributor workflow.
Why use it?
It gives new contributors a consistent starting point and preserves project knowledge between sessions.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is IsoCodeCrafter/PCP's own configuration. It tells Codex and OpenCode how to work on PCP itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything PCP configures โ†’

Reuse

Borrowing it

Nothing to install: this file belongs to IsoCodeCrafter/PCP. 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/IsoCodeCrafter/PCP/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/IsoCodeCrafter/PCP

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.

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README.md
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Or the 80ร—15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80ร—15 button for PCP AGENTS.md

Your own site ยท 80ร—15
<a href="https://agentmods.dev/instructions/isocodecrafter/pcp/agents-md"><img src="https://agentmods.dev/badge/instructions/isocodecrafter/pcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 658 This file is loaded in full into every session.
When invoked 658 The same file โ€” it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file โ€” not that it is safe.
Origin 100% copy Near-identical to another mod 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00658 $0.00658
Opus 5.5 $0.00263 $0.00263
Sonnet 5.5 $0.00132 $0.00132
Haiku 4.5 $0.00066 $0.00066

Measured 1mo ago against content hash a5cebb275f7c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

PCP AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories โ€” prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency โ€” measured 1mo 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.

Origin

This is a copy

100% identical to PCP copilot-instructions.md โ€” 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

AGENTS.md ยท 47 lines

How it starts

The opening of the file, as written. The whole thing โ€” 47 lines โ€” stays where its author put it; the contents beside it link to each section on GitHub.

๐Ÿ“Œ Project Context Protocol (PCP) Directives

Automatically synced by PCP CLI (v0.1.2). Do not edit between boundary markers.

This repository adheres to the Project Context Protocol (PCP) standard for preserving, organizing, and maintaining persistent project continuity across human and AI contributors.

๐Ÿงญ Context Location & Architecture

  • Canonical Entry Point: context/manifest.yaml
  • Core Knowledge Components:
    • context/ARCHITECTURE.md: Structural boundaries, component domains, and non-negotiable architectural constraints.
    • context/DECISION_LOG.md: Historical architectural decision records (ADRs) with rationale and consequences.
    • context/KNOWLEDGE.md: Durable domain rules, business invariants, and technical conventions.
    • context/OPEN_WORK.md: Active tasks, priority backlog items, and technical debt tracking.
    • context/OPERATIONAL_GUIDE.md: Setup, testing, contribution, deployment, and operational runbooks.

๐Ÿค– AI Contributor Protocol

  1. Session Handshake (Cold-Start Briefing):
    • At the beginning of any session or upon first interaction, inspect context/manifest.yaml, the latest entry in context/DECISION_LOG.md, and active tasks in context/OPEN_WORK.md.
    • Provide a concise (3-4 lines max), token-friendly greeting card:
      [PCP Active | <project-name>]
      โšก Last Decision: DEC-XXXX (<title> - by <author>)
      ๐Ÿ“‹ Active Task: WORK-XXXX (<title>)
      Ready. How should we proceed?
      
  2. Context-First Discovery:
    • Before suggesting architectural changes or writing code, consult the relevant context components.
    • Preserve established knowledge: Never rediscover or contradict past decisions in DECISION_LOG.md without an explicit rationale.
  3. Autonomous Context Synchronization (Gravity Matching):
    • Do NOT ask repetitive confirmation questions like "Should I record this decision?".
    • When introducing structural/architectural changes (new dependencies, schema changes, state management patterns, API contracts) or completing open tasks:
      • Compare against existing entries to match the appropriate abstraction level.
      • Proactively bundle the context update (DECISION_LOG.md, OPEN_WORK.md, or KNOWLEDGE.md) directly into the code change using valid RFC-0001 schema and sequential IDs.
      • Report the context update in your final response summary (e.g., "Context updated: DEC-0003 & WORK-0001 marked completed").
      • The human authorizes the change naturally via Git diff / PR review.
  4. Context Integrity Verification:
    • Ensure YAML frontmatters, IDs, and cross-references remain valid:
      npx @craftsolutions/pcp check
      
  5. Context Bundling:
    • For external reasoning or web chat review, active context can be compiled via:
      npx @craftsolutions/pcp pack -a
      

Read the full file on GitHub ยท 47 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.

  1. 1mo ago First seen ยท 47 lines ยท 658 tokens per session scan A a5cebb275f7c

Subscribe to this mod's changes

PCP AGENTS.md is an instructions file published in the GitHub repository IsoCodeCrafter/PCP (0 stars, last pushed 20d ago), licensed MIT. It adds 658 tokens to every session, about $0.0026 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to PCP copilot-instructions.md, differing in 0 lines, and is treated as a copy.

Related

PCP AGENTS.md compared with instructions from other repositories

PCP AGENTS.md next to 6 instructions from other repositories
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PCP AGENTS.mdIsoCodeCrafter/PCPInstructions file020d agoMITA658Codex, OpenCode
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vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode