LOOP: Retro

A command that runs a repeating engineering review cycle. The cycle saves milestones, reviews what happened, extracts lessons, checks the original intent, finds gaps, and prepares a starting point for the next round.

In plain words
What is it for?
Use it after engineering milestones to run retrospectives, identify missing work, and create the next iteration's starting plan.
Why use it?
It provides a repeatable way to learn from completed work and decide what to improve next.

Command

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 commands/alrece/loop-engineering/retro
Clone the repo
git clone --depth 1 https://github.com/alrece/loop-engineering
Per session 36 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 746 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00036 $0.00746
Opus 5 $0.00018 $0.00373
Sonnet 5 $0.00007 $0.00149
Haiku 4.5 $0.00004 $0.00075

Measured yesterday against content hash 43aff1f7b355, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

LOOP: Retro 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.

commands/retro.md · 46 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 46 lines · 36 tokens per session scan A 43aff1f7b355

Subscribe to this mod's changes

LOOP: Retro is a command published in the GitHub repository alrece/loop-engineering (2 stars, last pushed 1mo ago), with no licence file. It adds 36 tokens to every session and 746 once invoked, about $0.0002 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.