A process for examining a shared collection of session retrospectives and finding recurring lessons for an AI-agent development team.

Use it to pull new retrospectives, compare recurring patterns, propose changes to team skills, and track which retrospectives have already been reviewed.

It turns repeated problems into proposed rules while requiring evidence and leaving the final decision to the project owner.

retro-mine — Skill for Claude Code by MotWakorb/ai-agent-dev-team

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.

Any agent

npx skills add MotWakorb/ai-agent-dev-team --skill retro-mine

Clone the repo

git clone --depth 1 https://github.com/MotWakorb/ai-agent-dev-team

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/motwakorb/ai-agent-dev-team/retro-mine/github.svg)](https://agentmods.dev/skills/motwakorb/ai-agent-dev-team/retro-mine)

Your own site

<a href="https://agentmods.dev/skills/motwakorb/ai-agent-dev-team/retro-mine"><img src="https://agentmods.dev/badge/skills/motwakorb/ai-agent-dev-team/retro-mine/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/motwakorb/ai-agent-dev-team/retro-mine"><img src="https://agentmods.dev/badge/skills/motwakorb/ai-agent-dev-team/retro-mine.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 892 The whole file, excluding the scripts and references it only reads on demand.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00060	$0.00892
Opus 5.5	$0.00024	$0.00357
Sonnet 5.5	$0.00012	$0.00178
Haiku 4.5	$0.00006	$0.00089

Measured 2mo ago against content hash b8d17b8282b9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

retro-mine 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.

retro-mine/SKILL.md · 53 lines

How it starts

The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Retro Mine

Turn the retro corpus into actionable changes to this skill system. This formalizes the "retro-driven rule additions" passes previously done by hand (see CHANGELOG). Run it from the ai-agent-dev-team repo — the output targets its skill files.

Retros are the stress test for skill rules: patterns found here become rules, and future retros validate them. Both directions matter — new patterns need new rules, and recurring patterns that already have rules mean the rule isn't working.

Process

Pull — gather everyone's latest retros (/retro-sync is push-only):
```
git -C ~/retros pull --rebase origin main
```
If ~/retros isn't a git repo yet, run /retro-sync once to bootstrap it, then pull.
Watermark — retro-mine/LAST_MINED in this repo holds the filename of the newest retro covered by the last pass. Retro filenames are date-prefixed, so "new" = every date-prefixed file (~/retros/20*.md) sorting after it — ignore the corpus README. Missing watermark = mine the whole corpus.
Extract — spawn reader agents (persona-reviewer, model: sonnet), ~5 retros per agent. Each returns, per retro, only what's structurally reusable:
- Agent failure modes (what the agent got wrong, and at what point in the session)
- PO friction (what made the work harder — process, not personality)
- Process/skill gaps (Section 5 and persona "What I'd flag" entries)
- Keep / Stop / Start lessons
- For each: a one-line candidate rule and the skill file that would own it
Readers quote the retro (filename + line) as evidence — no paraphrase-only findings.
Cluster (orchestrator) — group findings across retros by failure family and owning file:
- ≥2 retros showing the same pattern → rule candidate
- 1 retro → watch item; record it, don't propose a rule yet
- Pattern already covered by an existing rule → check the rule's landing date (git log on the owning file). Recurrences in retros dated after the rule landed are a rule-not-working signal — propose strengthening or enforcement (hook), not a duplicate rule

Read the full file on GitHub · 53 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

LAST_MINED 46 B

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.

2mo ago First seen · 53 lines · 60 tokens per session scan A b8d17b8282b9

Subscribe to this mod's changes

retro-mine is a skill published in the GitHub repository MotWakorb/ai-agent-dev-team (2 stars, last pushed 2mo ago), licensed MIT. It adds 60 tokens to every session and 892 once invoked, about $0.0002 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.

Building agents Research

retro-mine next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
retro-mineMotWakorb/ai-agent-dev-team	Skill	2	2mo ago	MIT	A	60	Claude Code
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	today	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	today	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	314k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code