retrospective AGENTS.md

A repository instruction file for the Retrospective skill, which reviews how a coding-agent session was conducted rather than only what it produced.

In plain words
What is it for?
Use it when maintaining the Retrospective skill or judging whether its instructions give useful, honest session reviews.
Why use it?
It sets boundaries that keep the review tied to the current conversation and prevent invented transcripts, quotes, tool calls, or measurements.

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/robcsaszar/retrospective/agents-md
Clone the repo
git clone --depth 1 https://github.com/robcsaszar/retrospective

Made for: Codex, OpenCode.

Per session 332 This file is loaded in full into every session.
When invoked 332 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 $0.00332 $0.00332
Opus 5 $0.00166 $0.00166
Sonnet 5 $0.00066 $0.00066
Haiku 4.5 $0.00033 $0.00033

Measured 2d ago against content hash 6418d98e1de4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

retrospective 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 2d 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 · 21 lines

What it actually says

AGENTS.md

Mission

This repo publishes the retrospective skill for others to install. There is no build, no tests, no runtime of its own; the deliverable is the contents of skills/retrospective/. Judge changes by one test: would a stranger who installs this skill into their own project get a correct, generically useful session review out of it — one grounded in the conversation they are actually in?

Judgment boundaries

NEVER:

  • Never let the skill read an on-disk transcript, log, or exported chat — its whole premise is that the current conversation is already the context. A version that opens a file to score it is a different, more dangerous skill.
  • Never let the skill fabricate token counts, tool calls, or quotes. Relative magnitude only; the account is grounded in what happened, not in invented numbers.

ASK:

  • Ask before adding a second skill; this repo is intentionally single-skill.
  • Ask before restructuring the shape → context → wiring flow, or removing the honesty rules (current-session-only, no fabrication, never block on I/O).
  • Ask before changing the license or copyright holder.

ALWAYS:

  • Keep the skill's content generic — it must read as session review guidance for any project on any Agent Skills host, never tied to one codebase, tracker, or tool's command names.
  • Keep the six shape names, the five economy-rule names, and the score key consistent between SKILL.md and the references/ files — the review cites them by name, so a rename in one place without the other breaks the citations.
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. 2d ago First seen · 21 lines · 332 tokens per session scan A 6418d98e1de4

Subscribe to this mod's changes

retrospective AGENTS.md is an instructions file published in the GitHub repository robcsaszar/retrospective (0 stars, last pushed 3d ago), licensed MIT. It adds 332 tokens to every session, about $0.0017 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.

Related

Other instructions, from other repositories