ethos AGENTS.md

Repository instructions for AI coding agents contributing to ethos, a software project with strict release, documentation, and engineering rules. They describe which project documents are authoritative and which constraints apply to changes.

In plain words
What is it for?
Use them before planning or implementing changes in ethos. They help agents choose the right project context, follow release procedures, and preserve documented contracts.
Why use it?
They prevent agents from relying on outdated plans or inventing unapproved features. They also make requirements such as repeatable output and safe failure explicit.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/docushell/ethos/agents-md
Clone the repo
git clone --depth 1 https://github.com/docushell/ethos

Made for: Codex, OpenCode.

Per session 295 This file is loaded in full into every session.
When invoked 295 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00295 $0.00295
Opus 5 $0.00148 $0.00148
Sonnet 5 $0.00059 $0.00059
Haiku 4.5 $0.00030 $0.00030

Measured yesterday against content hash ea78115c664d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ethos 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 yesterday.

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 · 23 lines

What it actually says

Agent instructions

Implementing anything in this repository? Start from an explicitly scoped issue, PR, or decider request. For release-specific work, read the current docs/v<version>-release-prep.md before writing code. Do not infer a new public surface or workstream from historical planning records.

Other authoritative context, in reading order:

  1. The scoped issue, PR, or decider request; for a release train, its docs/v<version>-release-prep.md.
  2. docs/execution-status.md — current release state and explicit blockers.
  3. README.md + docs/public-boundary-claims.json — approved public wording; never edit claim strings without the approval lane.
  4. SPEC.md, docs/determinism-contract.md, docs/decisions/ (ADRs) — contracts and decisions.
  5. docs/roadmap.md, IMPLEMENTATION_PLAN.md — public direction and historical milestones.

Hard rules that apply to every change: determinism is a contract (byte-identical output under a pinned profile — add double-run tests for new artifacts); fail closed on missing capability; claims gate must stay green; no AGPL dependencies; PDFium stays caller-provided unless an accepted ADR says otherwise; every landed change adds a CHANGELOG.md entry under Unreleased.

Imported Claude Cowork project instructions

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. yesterday First seen · 23 lines · 295 tokens per session scan A ea78115c664d

Subscribe to this mod's changes

ethos AGENTS.md is an instructions file published in the GitHub repository docushell/ethos (5 stars, last pushed 2d ago), licensed Apache-2.0. It adds 295 tokens to every session, about $0.0015 per session on Opus 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.