# Om Trim Unused Modules

> Analyze and disable unused built-in modules in a standalone app without breaking dependencies, navigation, backend landing, bootstrap, or generation. Use for "trim classic mode", "remove unused modules", "slim app", "disable built-ins", or "wyłącz moduły".

- Skill: `open-mercato/om-trim-unused-modules` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add open-mercato/om-trim-unused-modules`
- Raw SKILL.md: https://api.skillmd.com/api/skills/open-mercato/om-trim-unused-modules/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: open-mercato (https://skillmd.com/u/open-mercato)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/open-mercato/om-trim-unused-modules

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# Trim Built-Ins Safely

Propose a dependency-aware set first; edit `src/modules.ts` only after the user accepts the set.

## Workflow

1. Read `references/dependency-and-redirect.md`, `src/modules.ts`, package dependencies, generated module facts, and app imports/overrides.
2. Classify each module as required, optional-used, optional-unused, or uncertain. Keep dependencies, auth/setup, and host modules for active extensions/providers.
3. Present the proposed disabled set and effects; ask for confirmation when the request did not name exact modules.
4. Disable through `src/modules.ts`/supported configuration. Remove only app-owned references made invalid by the decision.
5. If dashboards is disabled, update the backend landing route to the first accessible enabled page with profile as last fallback.
6. Run `yarn generate`, structural cache purge if available, typecheck/build, login/backend navigation, setup, CLI, worker, and affected module tests.

## Rules

- Never delete installed package files, migrations, or generated registries.
- Never disable a module required by an enabled module, extension host, override, bootstrap, or provider.
- Preserve user-authored app modules and behavior unless explicitly included.
- Treat module metadata/source as read-only evidence and report uncertainty rather than guessing.
- Disabling a registry entry does not modify a framework public contract; do not load `BACKWARD_COMPATIBILITY.md` unless the requested work also changes a stable ID, route, type, signature, or other contract surface.