Build

Development

by LifeOS

Builds, tests, modifies and checks up on software against its ISA, from a one-file change to a giant system. Build turns intent into ISA criteria and makes them pass; Test proves the ISA is well formed, matches the code, and every criterion's Assay eval passes; Modify changes criteria first, then code; Checkup joins the ISA with production, Vigil, Errata and Achilles, says why each red criterion is red, and repairs the ISA. Each run is sized to the ask: small work inline, wide work a workflow. USE WHEN build an app, site, game, tool, CLI or pipeline, start a new project, implement or change a feature, fix a bug in an app, test the app, is the code in sync with the ISA, run the app evals, catch up an old repo into an ISA, health check, checkup, why are these ISCs red, audit the ISA, sync the ISA with production. NOT FOR editing an ISA's articulation alone (ISA), eval or judge design (Assay), new skills (CreateSkill), workflow definitions (Workflows), slides, images, Visualize, deploying

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Install this skill

Run this command in your terminal. No account required — it auto-detects your AI tool and installs the skill file.

npx @skills-hub-ai/cli install lifeos-development
Or download directly:
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Setup by platform

Claude Code

~/.claude/skills/<skill>/SKILL.md

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Install

One-click setup for your editor

Run in your project root

npx @skills-hub-ai/cli install lifeos-development --target claude-code
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Frequently asked questions about Development

What does the Development skill do?

Builds, tests, modifies and checks up on software against its ISA, from a one-file change to a giant system. Build turns intent into ISA criteria and makes them pass; Test proves the ISA is well formed, matches the code, and every criterion's Assay eval passes; Modify changes criteria first, then code; Checkup joins the ISA with production, Vigil, Errata and Achilles, says why each red criterion is red, and repairs the ISA. Each run is sized to the ask: small work inline, wide work a workflow. USE WHEN build an app, site, game, tool, CLI or pipeline, start a new project, implement or change a feature, fix a bug in an app, test the app, is the code in sync with the ISA, run the app evals, catch up an old repo into an ISA, health check, checkup, why are these ISCs red, audit the ISA, sync the ISA with production. NOT FOR editing an ISA's articulation alone (ISA), eval or judge design (Assay), new skills (CreateSkill), workflow definitions (Workflows), slides, images, Visualize, deploying It's a reusable SKILL.md instruction set that loads into your AI coding assistant on demand, no prompt engineering, no copy-pasting every session.

How do I install the Development skill?

Run `npx @skills-hub-ai/cli install lifeos-development` from your terminal. The CLI writes the SKILL.md to the correct location for your AI tool (e.g. ~/.claude/skills/lifeos-development/ for Claude Code or ~/.cursor/skills/ for Cursor with --target cursor) and adds it to your project's .skills.json lockfile.

Which AI tools does Development work with?

Development runs in Claude Code. It follows the open Agent Skills standard (SKILL.md), so the same skill works in every supported tool without modification.

Is the Development skill free?

Yes. Every skill on skills-hub.ai is free and open-source. There are no premium tiers, paywalls, or usage limits. You only pay for whatever AI assistant you're already using.

How do I use Development after installing it?

In Claude Code, type `/lifeos-development` (or whatever slash command the skill registers) and the AI follows the skill's instructions immediately. You can also reference it by name in natural language, your AI loads the skill into context when relevant.

Can I share the Development skill with my team?

Yes. Commit your project's .skills.json lockfile and teammates run `npx @skills-hub-ai/cli install` (no args) to install every skill at the exact version you pinned. Organization-scoped installs work via skills-hub.ai organizations.