Agent skill
ln-011-agent-installer
Installs or updates Codex CLI, Gemini CLI, and Claude Code. Use when CLI agents need installation or update.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/ln-011-agent-installer-levnikolaevich-claude-code-skills
SKILL.md
Paths: File paths (
shared/,references/) are relative to skills repo root. Locate this SKILL.md directory and go up one level for repo root.
Agent Installer
Type: L3 Worker Category: 0XX Shared
Installs or updates CLI agents via npm and Claude CLI. Single pass per agent: install then immediately verify.
Input / Output
| Direction | Content |
|---|---|
| Input | OS info, disabled flags per agent, dry_run flag |
| Output | Per-agent status: installed / updated / skipped / disabled / failed |
Agent Registry
| Agent | Install Command | Health Check |
|---|---|---|
| Codex | npm i -g @openai/codex |
codex --version |
| Gemini | npm i -g @google/gemini-cli |
gemini --version |
| Claude | claude update |
claude --version |
Workflow
For each agent: Install → Verify → Record
Phase 1: Install & Verify
For each agent in registry, apply first matching rule:
| Condition | Action | Report |
|---|---|---|
disabled: true |
SKIP | "disabled by user" |
dry_run: true |
Show planned command | "dry run" |
| npm agent | npm install -g {pkg} then {cmd} --version |
version or error |
| Claude | claude update then claude --version |
version or error |
Single pass: install and verify happen atomically per agent. No separate scan phase — the install result IS the state.
Error handling:
| Error | Detection | Response |
|---|---|---|
| npm not in PATH | npm --version fails |
FAIL gracefully, report "npm not found in PATH" |
| Permission denied | stderr contains "EACCES" | FAIL, suggest npm install -g --prefix ~/.local {pkg} |
| Network error | stderr contains "ETIMEDOUT" or "ENETUNREACH" | FAIL, report "network error" |
| Unknown error | Any other non-zero exit | FAIL, include stderr |
Output table:
Agent Installation:
| Agent | Action | Version | Status |
|--------|-----------|----------|--------|
| Codex | installed | 0.1.2503 | ok |
| Gemini | skipped | - | disabled by user |
| Claude | updated | 1.0.30 | ok |
Critical Rules
- Never modify
disabledflags. Respect them, never change them - Fail gracefully. One agent failure does not block others
- Global install only. Always
npm install -g(CLI tools must be in PATH) - No side effects. Only npm global packages touched. No config files modified
- Idempotent. Safe to run multiple times
Anti-Patterns
| DON'T | DO |
|---|---|
| Separate check/install/verify phases | Single pass: install then verify |
| Retry failed installs automatically | One attempt, report failure |
Use sudo npm install |
Suggest --prefix for permission issues |
Install agents marked disabled |
Skip with clear report |
Definition of Done
- All agents processed in single pass (install + verify)
- Disabled agents skipped with report
- Version verified immediately after each install
- Status table displayed
Version: 1.1.0 Last Updated: 2026-03-23
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