feature-slicing
Organize frontend code with Feature-Sliced Design (FSD). Use when adopting FSD, placing code in an existing FSD project, or fixing slice imports and public APIs; not for every new component or page.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/ccheney/robust-skills --skill feature-slicing- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads feature-slicing automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Feature-Sliced Design
Apply FSD v2.1 to the requested module-boundary decision. The user's explicit instructions take precedence over this skill's guidelines; an ordinary frontend edit is not permission to migrate its architecture.
Work within the project
Use the affected files, imports, framework/router, and requested behavior as input. Determine whether the repository already uses FSD or the user is asking to adopt it. If neither is true, preserve the existing structure.
Prefer page-local ownership until shared use or a distinct responsibility justifies extraction:
| Layer | Responsibility |
|---|---|
app | Initialization, providers, routing |
pages | Screens and their local UI, data, and logic |
widgets | Self-contained UI blocks |
features | Reusable user interactions |
entities | Shared business concepts |
shared | Infrastructure and domain-independent utilities/UI |
Use only the layers needed. Preserve framework-reserved directories and server/client boundaries, particularly in Next.js.
Maintain the import contract
- A slice imports other slices from lower layers, not sideways or upward. Explicit
@xAPIs are the documented cross-entity exception. appandsharedhave segments rather than slices; their segments can import one another.- Expose deliberate public APIs. Use internal relative imports to avoid importing a slice's own barrel; keep server-only exports out of client entrypoints.
- Name FSD segments by purpose (
ui,api,model,lib,config). Do not rename unrelated folders merely to match an example.
Deliver the requested placement, refactor, or review with the resulting import paths. For code changes, verify affected imports and use existing architecture checks when available. Install Steiger or rewrite path aliases only when the task calls for tooling setup.
References
Choose the reference that resolves the current decision.
| Task | Reference |
|---|---|
| Layer ownership and extraction | LAYERS.md |
Public APIs, barrels, cycles, @x | PUBLIC-API.md |
| Concrete entity/feature/widget/page examples | IMPLEMENTATION.md |
| Next.js route directories and server/client exports | NEXTJS.md |
| Requested migration of existing code | MIGRATION.md |
| Import matrix or compact structure lookup | CHEATSHEET.md |
Use the official FSD documentation for specification questions. Adapt example libraries and aliases to the installed stack.
FAQ
What does the feature-slicing skill do?
Organize frontend code with Feature-Sliced Design (FSD). Use when adopting FSD, placing code in an existing FSD project, or fixing slice imports and public APIs; not for every new component or page.
How do I install feature-slicing?
Run npx skills add https://github.com/ccheney/robust-skills --skill feature-slicing in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/feature-slicing/ (personal) or .claude/skills/feature-slicing/ (project).
Which AI agents can use feature-slicing?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is feature-slicing safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains feature-slicing?
It is published by ccheney in ccheney/robust-skills. It has 238 recorded installs.
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