CLI usage

Three commands. All are idempotent — running them twice in a row is a no-op the second time.

agent-kit init

Scaffold a starter AGENTS.md (only if it does not exist), derive the per-tool files from it, and seed agentKit.targets in package.json.

npx @mongez/agent-kit@latest init                 # no install — runs the latest published version
npx @mongez/agent-kit@latest init --target claude,cursor

Scoped name with npx. Use npx @mongez/agent-kit … (scoped) when running without a local install — npx agent-kit … (unscoped) resolves a different package. The bare agent-kit binary only works once it’s installed locally.

Flags:

• --cwd <path> — start from a different working directory (defaults to process.cwd()).
• --target <names> — comma-separated skill targets to write into package.json’s agentKit.targets (claude, copilot, cursor, codex, opencode, amp, goose, kiro, antigravity). Defaults to claude. Passing this overwrites an existing agentKit.targets; without it, an already-set value is left alone. Unknown names error out before anything is written.

init vs sync — different delivery

• init is a one-time scaffold → npx @mongez/agent-kit@latest init is ideal (zero install, always latest).
• sync runs on every install and in CI → install agent-kit as a pinned dev dependency and call it from postinstall. Don’t route the recurring sync through always-latest npx — a new agent-kit version could silently change generated output, breaking build reproducibility. Ad-hoc manual npx @mongez/agent-kit@latest sync is fine.

Behavior:

• If AGENTS.md exists → leave it alone.
• If AGENTS.md is missing → write a starter template.
• Always derives CLAUDE.md, .gemini/GEMINI.md, .github/copilot-instructions.md, CONVENTIONS.md.
• Seeds agentKit.targets into package.json: writes ["claude"] (the built-in default, made explicit so it’s discoverable and editable) when no agentKit.targets exists; writes --target’s value when that flag is passed, overwriting any existing list. An existing agentKit block’s other fields (pick, omit, …) and the file’s indentation are preserved. Note targets only gates the skills export — init itself doesn’t sync skills, so the seeded value first takes effect on the next agent-kit sync.
• Wires "postinstall": "agent-kit sync" into package.json — but only when it’s safe: (1) @mongez/agent-kit is already a declared dependency/devDependency (so the bare agent-kit binary resolves at install time — the npx @mongez/agent-kit@latest init bootstrap installs nothing, so wiring a postinstall there would break the next install), and (2) no postinstall already exists (an existing one is never clobbered). When either gate blocks, init prints a hint instead of writing.

agent-kit sync

Re-derive the per-tool files from AGENTS.md and export skills from installed packages.

npx agent-kit sync
npx agent-kit sync --target claude,cursor
npx agent-kit sync --derive-only
npx agent-kit sync --skills-only
npx agent-kit sync --path @warlock.js
npx agent-kit sync --projects backend,frontend
npx agent-kit sync --override

Flags:

• --cwd <path> — working directory override.
• --target <names> — comma-separated skill targets. Valid: claude, copilot, cursor, codex, opencode, amp, goose, kiro, antigravity. Defaults to claude.
• --derive-only — skip skills export.
• --skills-only — skip derivation.
• --path <dirs> / -p — comma-separated extra dirs to scan, each treated like a node_modules/ (its children are packages). Use for folders of linked packages (--path @warlock.js). Packages found in scan paths override same-named entries in node_modules/.
• --projects <dirs> — comma-separated monorepo project dirs (or one-level globs like apps/*) to aggregate. Each is treated as one project: its own skills/ (prefixed with the project dir name) plus its node_modules/ deps (filtered by that project’s agentKit config). Distinct from --path; defaults to agentKit.monorepo.projects. See the Monorepos page.
• --override — replace user-authored destination folders (those without our .agent-kit-managed sentinel). Skipped with a warning by default.

This is the command to wire into your project’s postinstall:

{
  "scripts": {
    "postinstall": "agent-kit sync"
  }
}

agent-kit watch

Watch AGENTS.md and your editable skill source directories; re-derive and re-sync on change. Intended for the active dev loop when editing skills locally and for monorepo / path-linked setups where postinstall does not re-fire.

npx agent-kit watch
npx agent-kit watch --path @warlock.js
npx agent-kit watch --projects backend,frontend

Flags:

• --cwd <path> — working directory override.
• --path <dirs> / -p — extra package dirs (each treated like a node_modules/) whose skills/ should also be watched.
• --projects <dirs> — monorepo project dirs (or one-level globs) to aggregate + watch. Defaults to agentKit.monorepo.projects.
• --override — replace user-authored destination folders on each re-sync.

Behavior:

• Performs a full sync on startup so the working tree is consistent.
• Resolves the real skill-source directories and watches those: AGENTS.md, the root skills/, each --path package’s skills/, and each --projects project’s skills/ + package.json (so pick/omit edits re-sync too). Watching concrete dirs is deliberate — chokidar v4+ dropped glob support, so glob patterns would silently match nothing.
• Dependency skills under node_modules/ are not watched — they change only on (re)install, which fires postinstall → sync.
• Listens for add/change/unlink and debounces re-syncs by 150ms.
• New top-level skill folders created mid-session are picked up on the next watch restart.

Programmatic API

import {
  deriveAll,
  syncSkills,
  findProjectRoot,
  scanForSkillPackages,
  deriveSlugForSkill,
} from "@mongez/agent-kit";

const root = await findProjectRoot();
if (!root) throw new Error("No package.json found");

const derived = await deriveAll({ root, targets: ["claude"] });
const skills = await syncSkills({
  root,
  targets: ["claude", "cursor"],
  scanPaths: ["@warlock.js"],     // optional: extra scan roots (children = packages)
  projects: ["backend", "frontend"], // optional: monorepo projects to aggregate
  override: false,                // optional: replace user-authored dest folders
});

// skills.exported, skills.pruned, skills.skipped, skills.targets,
// skills.packages, skills.scannedPaths, skills.projects

Exit behavior

• All commands exit 0 on success.
• sync exits non-zero if AGENTS.md is missing (the derive pass throws). --skills-only bypasses that pass and succeeds without it. init never errors on a missing source — it creates one.
• watch runs until the process is killed.