skill CX Codex

retro · necmttn — Claude Code skill: ax experiment-loop retrospective

Q: How to install retro in Claude Code?

Run `npx skills add Necmttn/ax --skill retro -a claude-code`, the skill will appear in `~/.claude/skills/retro/SKILL.md`.

Q: What does retro require to work?

Installed `axctl` on `PATH` and configured DuckDB dylib. If `ax improve list` fails, the skill points to `docs/development.md#setup` and stops.

Runs a guided session over the ax agent-experience graph. Shows open proposals, pending verdicts, and hook effectiveness signals.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓

npx skills add Necmttn/ax --skill retro -a claude-code

Open on GitHub

What retro does

Fires on /ax:retro or phrases like "ax retrospective", "review my ax proposals", "triage proposals". Reads data via ax improve and ax hooks, lists proposals by frequency and confidence. Each proposal is a hypothesis about where the agent can improve: add a pre-tool guard, reduce recurring user corrections, or eliminate a friction pattern.

Starts with ax improve checkpoint to snapshot measurements. Then shows open proposals (skill or guidance form), experiments awaiting verdict, and a hook summary for the last seven days. The user decides per row: accept with scaffolding, reject, or confirm the suggested verdict.

Requires axctl on PATH and configured DuckDB dylib. Without them, ax improve list fails and the skill stops with a pointer to docs/development.md#setup. Does not fire on generic phrases like "look at my recent work" — only on explicit retro triggers.

What it helps with

triage the queue of agent improvement proposals
lock verdicts for finished experiments
review hook effectiveness over the past week
drain backlog retros from previous sessions

Example prompts for the agent

Run an ax retro and show me the open proposals
Start an ax retrospective, I want to lock the pending verdicts
Check experiment loop status and list what needs a decision

How to install retro

1Skills CLI (Vercel)

npx skills add Necmttn/ax --skill retro -a claude-code

2Manually: put the files in place

~/.claude/skills/retro/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/retro/

1Skills CLI (Vercel)

npx skills add Necmttn/ax --skill retro -a codex

2Manually: put the files in place

.agents/skills/retro/SKILL.md

For all projects use ~/.agents/skills/

1Skills CLI (Vercel)

npx skills add Necmttn/ax --skill retro -a cursor

2Manually: put the files in place

.cursor/skills/retro/SKILL.md

Cursor also reads .agents/skills/ and .claude/skills/

1GitHub CLI

gh skill install Necmttn/ax retro

2Manually: put the files in place

.github/skills/retro/SKILL.md

1Skills CLI (Vercel)

npx skills add Necmttn/ax --skill retro -a gemini-cli

2Platform CLI

gemini skills install https://github.com/Necmttn/ax --path skills/retro

Manually: put the files in place

.devin/skills/retro/SKILL.md

The legacy .windsurf/skills/ path still works

Skills CLI (Vercel)

npx skills add Necmttn/ax --skill retro -a opencode

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about retro

How to install retro in Claude Code?

Run npx skills add Necmttn/ax --skill retro -a claude-code, the skill will appear in ~/.claude/skills/retro/SKILL.md.

What does retro do?

Runs a guided session over the ax experiment graph: shows open proposals, unlocked verdicts, and hook effectiveness summary. The user decides per row what to do next.

What does retro require to work?

Installed axctl on PATH and configured DuckDB dylib. If ax improve list fails, the skill points to docs/development.md#setup and stops.

retro by other authors comes first.

retro Matt Pocock Reviews a coding session and suggests changes to the agent environment for later runs. Use it after mistakes, slow repository navigation, or costly tool calls. 276,027installs retro phuryn Facilitates structured sprint retrospectives, analyzes team performance, and turns feedback into prioritized action items with assigned owners and deadlines. CX Codex +1 2,700installs retro typeui.sh Sets up a vintage design system with high-contrast palettes, Macondo typography, and WCAG 2.2 AA accessible component guidelines. CX Codex +1 2,300installs retro rainmanjam Guides post-incident code analysis to identify structural weaknesses and prevent entire classes of failures. CX Codex +1 ★ 24repo stars retro rainmanjam Transforms an outage or bug into a structural constraint that stops the entire class of mistakes permanently. CX Codex +1 ★ 24repo stars setup-matt-pocock-skills Matt Pocock This skill configures a repository for Matt Pocock's engineering skills by setting its issue tracker, triage labels, and domain docs layout. Run it before using the other skills. 1,052,851installs ask-matt Matt Pocock Routes you to the right Matt Pocock skill or flow for the task at hand. Use it when you need a starting point for a feature, prototype, incoming issue, or hard bug. 766,587installs to-tickets Matt Pocock Turns a plan, spec, or conversation into small end-to-end tickets with explicit blockers. Use it to agree on the work breakdown before tickets go to a tracker. 711,230installs writing-plans Jesse Vincent This skill turns requirements for a multi-step task into an implementation plan before code changes begin. It helps when another engineer needs exact files, interfaces, and checks. CX Codex 282,859installs caveman-review JuliusBrussee Turns code review comments into one line per finding: location, problem, fix. Useful when a diff or PR needs a fast pass without the filler. CX Codex +1 411,800installs caveman-compress JuliusBrussee Compresses CLAUDE.md, todo lists, and other prose files into a shorter format while retaining a readable backup. CX Codex +1 411,500installs

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