dev-retro

dev-retro is a skill for Claude Code, Codex from codeaholicguy/ai-devkit. It costs 67 tokens per session (547 once invoked), scanned A, original, Apache-2.0.

An evidence-based retrospective reviews completed work, a development session, or an incident to find recurring problems and practical fixes. A retrospective is a structured look back, not just a status report.

In plain words
What is it for?
Use it after a feature, fix, incident, or session when you need to understand what went wrong and decide how to prevent it happening again.
Why use it?
It prevents vague lessons and blame by requiring evidence such as failed commands, test output, rework, or reversions. It turns costly friction into automation, tool changes, instructions, or deliberately recorded knowledge.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

Part of the ai-devkit plugin — 31 skills, 1 hook shipped together

Good fit Use it after a feature, fix, incident, or session when you need to understand what went wrong and decide how to prevent it happening again.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/codeaholicguy/ai-devkit/dev-retro
About the project

AI DevKit is a local-first control layer that gives multiple AI coding agents shared configuration, a terminal dashboard, cross-agent messaging, local memory retrieval, and reusable engineering workflows. It is for developers and teams supervising agents such as Claude Code, Codex CLI, Gemini CLI, OpenCode, Pi, Cursor, Copilot, or Devin. The catalogue entries are composable skills and plugin components used within that agent-management system.

codeaholicguy/ai-devkit · 1,654 stars · on GitHub · ai-devkit.com

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 codeaholicguy/ai-devkit --skill dev-retro
Clone the repo
git clone --depth 1 https://github.com/codeaholicguy/ai-devkit

Made for: Claude Code, Codex.

Or install ai-devkit, the plugin that ships this one along with the rest of its 31 skills, 1 hook.

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 dev-retro

README.md
[![agentmods](https://agentmods.dev/badge/skills/codeaholicguy/ai-devkit/dev-retro/github.svg)](https://agentmods.dev/skills/codeaholicguy/ai-devkit/dev-retro)
Your own site
<a href="https://agentmods.dev/skills/codeaholicguy/ai-devkit/dev-retro"><img src="https://agentmods.dev/badge/skills/codeaholicguy/ai-devkit/dev-retro/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 dev-retro

Your own site · 80×15
<a href="https://agentmods.dev/skills/codeaholicguy/ai-devkit/dev-retro"><img src="https://agentmods.dev/badge/skills/codeaholicguy/ai-devkit/dev-retro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 547 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00067 $0.00547
Opus 5.5 $0.00027 $0.00219
Sonnet 5.5 $0.00013 $0.00109
Haiku 4.5 $0.00007 $0.00055

Measured 4d ago against content hash c12d5650867d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dev-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 4d 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.

skills/dev-retro/SKILL.md · 40 lines

What it actually says

Retro

Turn what went wrong into fixes that stop it recurring. Not a status summary: use session-compact for handoff state.

Rules

  • When suggested by another skill, ask the user before running; skip silently if declined.
  • Every item needs evidence: a failed command, hook or test output, a user correction, a revert, or rework in the diff. No generic lessons.
  • Cap at the 3-5 highest-cost items. Note what worked in one line only if it should be kept on purpose.
  • Blameless: describe the gap in the system, not the person or agent.
  • Never copy secrets, credentials, or personal data from transcripts into fixes or memory.

Fix Ladder

Pick the highest rung that works:

  1. Automate: test, lint rule, hook, CI check, build dependency.
  2. Fix the tool: script, template, default config.
  3. Instruct: skill, AGENTS.md / CLAUDE.md, docs.
  4. Remember: memory entry, only for knowledge that cannot be enforced. Search first; update instead of duplicating.
  5. Drop: one-off with no pattern.

Workflow

  1. Scope the work: feature, branch, session, or incident, and its commit range.
  2. Gather evidence: git log and diff for the range, failed or retried commands, hook/CI failures, task evidence, user corrections. Use the session transcript when available (agent sessions, session-compact); do not require it.
  3. For each item, record: what happened, cost (time, rework, risk), root cause in one line, and the fix with its rung, exact file or command.
  4. Present the items and wait for approval. Memory-only fixes may proceed; skill, config, CI, and code changes need explicit approval.
  5. Apply approved fixes, validate each with verify (a new check must fail on the old state when practical), and commit per the user's workflow.
  6. Report: fixes applied with rung, items dropped and why, follow-ups left open.

Stop

Pause when evidence is missing, a fix needs a team or ownership decision, or the root cause is unclear; hand unclear failures to dev-debug.

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.

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. 4d ago First seen · 40 lines · 67 tokens per session scan A c12d5650867d

Subscribe to this mod's changes

dev-retro is a skill published in the GitHub repository codeaholicguy/ai-devkit (1,654 stars, last pushed 2d ago), licensed Apache-2.0. It adds 67 tokens to every session and 547 once invoked, about $0.0003 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 2026-10-24.