sifs: Instructions file for Codex

AGENTS.md

sifs AGENTS.md is an instructions file for Codex, OpenCode from tristanmanchester/sifs. It costs 259 tokens per session, scanned A, original, MIT.

A set of AGENTS.md instructions for the SIFS project. It explains how to maintain the changelog when making user-facing changes and how to prepare release sections and tags.

In plain words
What is it for?
Use it when changing, documenting, packaging, or releasing SIFS so the changelog and version information stay up to date.
Why use it?
It keeps release notes consistent with project changes and helps prevent missing or incorrectly formatted changelog entries. It also records the expected release-version checks.

Instructions file for CodexOpenCode

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

This is tristanmanchester/sifs's own configuration. It tells Codex and OpenCode how to work on sifs 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 sifs configures →

Reuse

Borrowing it

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

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 sifs AGENTS.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/tristanmanchester/sifs/agents-md"><img src="https://agentmods.dev/badge/instructions/tristanmanchester/sifs/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 sifs AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/tristanmanchester/sifs/agents-md"><img src="https://agentmods.dev/badge/instructions/tristanmanchester/sifs/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 259 This file is loaded in full into every session.
When invoked 259 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 $0.00259 $0.00259
Opus 5 $0.00130 $0.00130
Sonnet 5 $0.00052 $0.00052
Haiku 4.5 $0.00026 $0.00026

Measured 8d ago against content hash a8c54009de6b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

sifs 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 8d 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 · 24 lines

What it actually says

AGENTS.md

Local project instructions for AI agents working in this checkout.

Changelog discipline

CHANGELOG.md is the source of truth for release notes.

  • Update CHANGELOG.md in the same turn as every user-facing code, behavior, documentation, packaging, installer, workflow, or compatibility change.
  • Add new work under ## Unreleased first. Use the existing categories: Added, Changed, Fixed, Performance, Security, Removed, and Notes.
  • Don't add empty categories. Create a category only when it has at least one bullet.
  • Keep entries user-facing and specific. Avoid commit-log noise like "bump version," "prepare release," or "apply formatting," unless that's the only release-relevant change.
  • When preparing a release, move the relevant Unreleased entries into a ## X.Y.Z - YYYY-MM-DD section, leave a fresh Unreleased section at the top, and confirm the version matches Cargo.toml and the vX.Y.Z tag.
  • Before tagging a release, confirm CHANGELOG.md includes the version section that GitHub release notes will use.
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. 8d ago First seen · 24 lines · 259 tokens per session scan A a8c54009de6b

Subscribe to this mod's changes

sifs AGENTS.md is an instructions file published in the GitHub repository tristanmanchester/sifs (2 stars, last pushed 3mo ago), licensed MIT. It adds 259 tokens to every session, about $0.0013 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.

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