Is the Lagune Engineering Reference skill free?

Yes. The skill itself is free from wellwelwel/lagune. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Lagune Engineering Reference SkillProof Score?

8.0/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 7/10, docs & honesty 3/5.

How do I install Lagune Engineering Reference?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Lagune Engineering Reference with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Lagune Engineering Reference

Project-internal engineering rules for the Lagune codebase (toolchain, conventions, build)

by wellwelwel · wellwelwel/lagune

Works with setup

Install — copy the command Download source ↗

Test report

Verdict: Works with setup
Score: 8.0/10
Tested: Jul 24, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 30, 2026 · 7e190b8

⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Jul 24, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.

A single-project rulebook, not a general skill: it dictates Lagune's exact conventions (ESM-only, named exports only, all types confined to src/types/, no any or as-unknown-as, node: import prefix, Poku across three runtimes) that no baseline could infer — genuinely useful, but only if you are working inside the Lagune repo. Marked internal:true, and its two headline cross-links, CLAUDE.md and the architecture skill, are left dangling because the single-dir install copies neither.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 7/10
Docs & honesty 3/5

What Lagune Engineering Reference does

The authoritative engineering reference for the Lagune project: its runtime-agnostic Node/Bun/Deno toolchain, TypeScript code conventions and type rules, the esbuild build/distribution path, and how its deterministic tracking hooks work. Triggers for contributors before writing or changing source under src/ or test/, or before the build — inside the Lagune repo.

How to install Lagune Engineering Reference

Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.

Commands — how to trigger Lagune Engineering Reference

/lagune-engineering Project-internal engineering rules for the Lagune codebase (toolchain, conventions, build)

It also activates on plain-language prompts like these:

What are the TypeScript conventions before I edit src/?
Explain Lagune's esbuild build and distribution path
How do Lagune's deterministic tracking hooks actually work?

Frequently asked questions

Is the Lagune Engineering Reference skill free?: Yes. The skill itself is free from wellwelwel/lagune. SkillProof publishes the install command and an independent test verdict at no cost.
Does Lagune Engineering Reference work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 24, 2026. Verdict: Works with setup. A single-project rulebook, not a general skill: it dictates Lagune's exact conventions (ESM-only, named exports only, all types confined to src/types/, no any or as-unknown-as, node: import prefix, Poku across three runtimes) that no baseline could infer — genuinely useful, but only if you are working inside the Lagune repo. Marked internal:true, and its two headline cross-links, CLAUDE.md and the architecture skill, are left dangling because the single-dir install copies neither.
What is the Lagune Engineering Reference SkillProof Score?: 8.0/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 7/10, docs & honesty 3/5.
How do I install Lagune Engineering Reference?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Lagune Engineering Reference with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.