agents-md-compactor: Instructions file for Codex

AGENTS.md

agents-md-compactor AGENTS.md is an instructions file for Codex, OpenCode from shin4141/agents-md-compactor. It costs 1,567 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for a standalone product called agents-md-compactor. They define who makes decisions, what the first product version includes, and which checks must pass.

In plain words
What is it for?
Use them when developing, reviewing, or deciding whether work is complete in the agents-md-compactor repository.
Why use it?
They prevent work from drifting into another project or exceeding the agreed product boundary, while preserving the required review and completion rules.

Instructions file for CodexOpenCode

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

This is shin4141/agents-md-compactor's own configuration. It tells Codex and OpenCode how to work on agents-md-compactor 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 agents-md-compactor configures →

Reuse

Borrowing it

Nothing to install: this file belongs to shin4141/agents-md-compactor. 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/shin4141/agents-md-compactor/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/shin4141/agents-md-compactor

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.

agentmods badge for agents-md-compactor AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/shin4141/agents-md-compactor/agents-md/github.svg)](https://agentmods.dev/instructions/shin4141/agents-md-compactor/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/shin4141/agents-md-compactor/agents-md"><img src="https://agentmods.dev/badge/instructions/shin4141/agents-md-compactor/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.

agentmods 80×15 button for agents-md-compactor AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/shin4141/agents-md-compactor/agents-md"><img src="https://agentmods.dev/badge/instructions/shin4141/agents-md-compactor/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,567 This file is loaded in full into every session.
When invoked 1,567 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01567 $0.01567
Opus 5.5 $0.00627 $0.00627
Sonnet 5.5 $0.00313 $0.00313
Haiku 4.5 $0.00157 $0.00157

Measured 2mo ago against content hash d2005f9f8db1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agents-md-compactor 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 · 168 lines

How it starts

The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Receiver Operating Capsule

This repository is the standalone shin4141/agents-md-compactor product. It is not a V13-series repository and must not import V13 production code. V11 Reconnectable Forgetting is the primary product concept; V13 supplies only the operating discipline below.

1. Ownership and Authority

  • Shin is the final Decision Owner.
  • This execution thread is the sole implementation owner. Do not create a competing implementation thread or ask Shin to shuttle routine prompts.
  • The implementation owner may choose ordinary implementation details within the frozen v0.1 boundary.
  • Product direction, public claims, pricing, release, externalization, branding, and risk-tolerance changes require Shin's approval.
  • Prior work, an artifact, or a passing test does not create new authority.

2. Current Gate and Completion

Current Gate:

The reviewed Fictional Sample 001 ancestry marker is bc5e513e4891bd912a8515c9ea98abb8cd27d755.

Before selecting the Gate, refresh canonical origin/main and check whether that marker is its ancestor:

git fetch origin main
git merge-base --is-ancestor bc5e513e4891bd912a8515c9ea98abb8cd27d755 origin/main
  • If it is not an ancestor, the Gate is: HOLD — Fictional Sample 001 review / merge. Missing Closure includes review / merge of Draft PR #5, Fable read-only review, and any separately authorized README/Fable-link or announcement decision. The next authorized action is review and, only with Shin's authorization, merge PR #5.
  • If it is an ancestor, the Gate is: HOLD — Fable read-only review separately unauthorized. PR #5 review / merge is no longer Missing Closure. The next stage is Fable read-only review, only with separate Shin authorization.

Do not infer settlement from the feature branch, the PR's existence, or a stale local checkout. While the marker is absent, PR #5 has not reached canonical main and does not authorize Fable.

Do not claim a stage complete from file existence, a running UI, partial generation, or a happy-path test alone. Each stage must record:

Read the full file on GitHub · 168 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. 2mo ago First seen · 168 lines · 1,567 tokens per session scan A d2005f9f8db1

Subscribe to this mod's changes

agents-md-compactor AGENTS.md is an instructions file published in the GitHub repository shin4141/agents-md-compactor (2 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 1,567 tokens to every session, about $0.0063 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 2026-08-31.

Related

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vscode model-prompts.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA2,022GitHub Copilot