Lean Retro Methodology

Q: What is a Claude Code skill and how does the Lean Retro Methodology skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Lean Retro Methodology is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Product · Sub-category: agile · Last updated: 2026-05-30

type:review

USE FOR: running a Lean 4 corpus retrospective — RETRO protocol (Refactor-Extract-Test-Refine-Optimize), adapting to project scale (Solo / Small / Medium / Large), per-phase enforcement scripts, cross-skill optimization rules, retro personas, tracking documents, embedded RALPH inside RETRO phases. DO NOT USE FOR: single proof review (use @lean-proof-review); council convocation (use @lean-review-council); research (use @lean-research); enforcement gate execution alone (use @lean-enforcement). TRIGGERS: retro, retrospective, RETRO protocol, refactor extract test refine optimize, retro phase, retro session, corpus retro, cross-skill optimization.

About this skill (catalog notes)

Lean Retro Methodology is published as a SKILL.md file in this catalog. The SKILL.md is on the shorter side at about 506 words.

Source: github.com/r-irbe/proof-skills
License: Apache-2.0
Original author: r-irbe
Indexed lastmod: 2026-05-30
Catalog position: Product · agile
Indexed related skills: 10

How Lean Retro Methodology fits the catalog

Lean Retro Methodology sits in the Product category under the agile sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

What this skill does

Lean Retro Methodology is a community-contributed Claude Code skill in the agile sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/lean-retro-methodology/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Lean Retro Methodology Claude Code skill is built for product managers, product designers, and cross-functional teams planning, shipping, and measuring product features. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 117,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/lean-retro-methodology
curl -L https://claudskills.com/skills/lean-retro-methodology/SKILL.md \
  -o ~/.claude/skills/lean-retro-methodology/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/lean-retro-methodology/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/lean-retro-methodology/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\lean-retro-methodology\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Lean Retro Methodology Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/lean-retro-methodology/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Lean Retro Methodology skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Lean Retro Methodology skill?

Use Lean Retro Methodology when your Claude Code task falls under the Product category — specifically in the agile area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Lean Retro Methodology" or describe the task and let Claude pick). Browse related skills at /category/product/.

What is a Claude Code skill and how does the Lean Retro Methodology skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Lean Retro Methodology is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Product category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/r-irbe/proof-skills/blob/HEAD/skills/lean-retro-methodology/SKILL.md
License: Apache-2.0
Author: r-irbe
Website: https://github.com/r-irbe/proof-skills

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

r-irbe. (2026). Lean Retro Methodology [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/lean-retro-methodology/

BibTeX

@misc{lean-retro-methodology-2026,
  author    = {r-irbe},
  title     = {Lean Retro Methodology [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/lean-retro-methodology/}
}

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