The builder pattern

The builder pattern (reference)

Every askit-build-<type> skill follows one shape. There is no per-component code “render engine”: across Claude and Codex, skills and MCP are portable files (wired by the native manifests), subagents and output styles are Claude-only, and a command’s Codex form is its backing skill. So the shared thing is the builder SKILL pattern, captured here once.

The shape (create mode)

1. Interview the component’s inputs (or read them from context).
2. Copy the type’s template from templates/ to the canonical file (commands/<name>.md, agents/<name>.md, skills/<name>/SKILL.md, …).
3. Author the Claude-native canonical file: frontmatter (per Standard sec 3.8 for the type) + body.
4. Register the component in library.json components.<type> as { name, path, version, tier, status }.
5. Wire any per-target manifest pointer by running node scripts/generators/gen-manifest.mjs . --write --target=all (skills/MCP are referenced by the native manifests; Claude auto-discovers commands/ and agents/).
6. Assess: node scripts/evaluate.mjs . --json and iterate to 0 errors.

The shape (improve mode)

1. node scripts/evaluate.mjs . --json and read the findings.
2. Fix each finding per its message (a missing maps-to, an over-scoped tool set, a description below the bar, a drifted manifest).
3. Re-run to confirm.

Cross-agent emission (what each type does)

• Skill / MCP: portable file, referenced by each native manifest (gen-manifest). Plugin-distributable on both agents.
• Subagent / output style: Claude-only (agent-targets: [claude]); no Codex artifact (Standard sec 3.3).
• Command: a new Claude commands/<name>.md; on Codex the backing skill IS the invocable form (Standard sec 3.2 parity) - no separate Codex file.
• Chain contract / AGENTS.md: agent-agnostic; one file, no per-target form.

There is no gen-<type>.mjs render engine - per-target wiring is gen-manifest’s job, and Claude-only types have no Codex artifact. Add a per-target renderer ONLY if a genuinely divergent, both-ingestible type ever appears (none in the v1 set).