lean
Minimal solution discipline: YAGNI ladder, stdlib and native first, shortest working diff.
Skill by yugasun
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Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/yugasun-lean
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: writing
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/lean
What's inside
- Skill name
lean- Description
- Minimal solution discipline: YAGNI ladder, stdlib and native first, shortest working diff. Use during delivery when writing code, or when the user says lean, lean mode, yagni, lazy mode, or complains about over-engineering.
- License
- MIT
- Instructions
- 34 lines in SKILL.md · view on GitHub
Files (1)
- SKILL.md
SKILL.md (first lines)
# Lean The smallest working change. Efficiency is not carelessness. Active during **delivery** in the aiops bundle; **off** during grill/alignment. ## Ladder Stop at the first rung that holds: 1. Does this need to exist? (YAGNI) 2. Stdlib does it? 3. Native platform feature? 4. Already-installed dependency? 5. One line? 6. Minimum code that works ## Rules - No unrequested abstractions, boilerplate, or speculative "for later" code - Deletion over addition; shortest working diff - Mark deliberate shortcuts: `// lean: <ceiling and upgrade path>` ## Output Code first, then at most three lines: what was skipped, when to add it. ## Never cut Trust-boundary validation, data-loss prevention, security, accessibility, explicitly requested behavior. ## Intensity `/lean lite|full|ultra` — default **full**. Off: "stop lean" / "normal mode".
From yugasun/aiops, MIT.
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- 0.521score
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Git operations wrapper: sync, stage, commit, push.
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code-graph
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Build and query a persistent code graph for the target project.
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domain-modeling
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file-refactor
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Keep source files under 500 lines.
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review
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Review in three modes — code (diff vs standards/spec), design (NOTES + tech-spec before planning), drift (implementation vs tech-spec before ship).
SkillCFreshness: C★ 4Claude Code +9 - 0.516score
aiops-setup
yugasun
Configure a target project for the aiops bundle — issue tracker, triage labels, domain doc layout.
SkillCFreshness: C★ 4Claude Code +9 - 0.514score
prune
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Review diffs for over-engineering only.
SkillCFreshness: C★ 4Claude Code +9 - 0.513score
tdd
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Test-driven development — vertical red-green-refactor slices through public interfaces.
SkillCFreshness: C★ 4Claude Code +9 - 0.513score
prototype
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Throwaway prototype to answer a design question — terminal logic explorer or multi-variant UI on one route.
SkillCFreshness: C★ 4Claude Code +9 - 0.513score
to-issues
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Break a plan or PRD into vertical-slice issues on the project issue tracker.
SkillCFreshness: C★ 4Claude Code +9
Signals
- Stars
- 4
- Forks
- 1
- Open issues
- 0
- Last commit (this folder)
- Aug 20, 2026 (2 months ago)
- Last release
- Jul 20, 2026 (3 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/yugasun/aiops
- Website
- aiops.yugasun.com/
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
More from yugasun
- 0.521score
aiops
yugasun
Flow Conductor for the aiops bundle.
SkillCFreshness: C★ 4Claude Code +9 - 0.519score
file-refactor
yugasun
Keep source files under 500 lines.
SkillCFreshness: C★ 4Claude Code +9 - 0.519score
architect-design
yugasun
Structured design process for the architect agent.
SkillCFreshness: C★ 4Claude Code +9 - 0.519score
code-graph
yugasun
Build and query a persistent code graph for the target project.
SkillCFreshness: C★ 4Claude Code +9 - 0.519score
domain-modeling
yugasun
Build and sharpen a project's domain model — glossary, ubiquitous language, ADRs.
SkillCFreshness: C★ 4Claude Code +9 - 0.519score
gitops
yugasun
Git operations wrapper: sync, stage, commit, push.
SkillCFreshness: C★ 4Claude Code +9
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Cite this page
lean skill. Agent Mart. https://agentmart.dev/skills/yugasun-lean (last updated 2026-10-24)