A migration guide for moving code into Feature-Sliced Design, a way to organize a frontend by shared code, data entities, user features, UI blocks, and pages.

Use it to relocate components, hooks, types, and other files under the shared source directory while updating their imports.

It reduces broken imports and unclear ownership when reorganizing an older project structure into these layers. It also requires a plan and confirmation before the move.

How shapediver/AppBuilderSdk configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to shapediver/AppBuilderSdk. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/shapediver/AppBuilderSdk/development/.claude/skills/fsd-migrate/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/shapediver/AppBuilderSdk

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/shapediver/appbuildersdk/fsd-migrate/github.svg)](https://agentmods.dev/skills/shapediver/appbuildersdk/fsd-migrate)

Your own site

<a href="https://agentmods.dev/skills/shapediver/appbuildersdk/fsd-migrate"><img src="https://agentmods.dev/badge/skills/shapediver/appbuildersdk/fsd-migrate/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/shapediver/appbuildersdk/fsd-migrate"><img src="https://agentmods.dev/badge/skills/shapediver/appbuildersdk/fsd-migrate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,455 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00058	$0.01455
Opus 5.5	$0.00023	$0.00582
Sonnet 5.5	$0.00012	$0.00291
Haiku 4.5	$0.00006	$0.00145

Measured today against content hash b5f0d70e169e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fsd-migrate scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/fsd-migrate/SKILL.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

FSD Migration Command

You are an FSD migration agent. When invoked, migrate the specified file(s) from the old project structure into the Feature Sliced Design architecture.

Project Context

All FSD layers live under src/shared/ (shared, entities, features, widgets, pages)
Use @AppBuilderLib/ alias for imports to avoid conflicts with the nested shared/ folder
The alias @AppBuilderLib resolves to src/shared/ (configured in vite.config.ts)
Old code lives in: components/, hooks/, store/, types/, utils/, modules/, pages/
FSD layers already in use: shared/, entities/, features/, widgets/

FSD Layers

Layer	Purpose
`shared/`	Reusable code with no business logic (ui, lib, config)
`entities/`	Business entities (data models, their UI representations)
`features/`	User-facing features with business logic
`widgets/`	Composite UI blocks combining multiple features/entities
`pages/`	Full page compositions

FSD Segments (inside each slice)

Segment	Contents
`ui/`	React components (`.tsx` with JSX)
`model/`	Stores (zustand), hooks with business logic
`api/`	API calls, SDK wrappers
`lib/`	Pure utility functions
`config/`	TypeScript types, constants, configuration

Workflow

Step 1: Analyze the target file

Read the file the user wants to migrate. Understand its role (UI component, hook, store, types, utility).

Step 2: Scan for related files

Before proposing the migration, search for closely related files that should move together:

Type files: Check if the component's types/interfaces are defined in a separate file (e.g., in types/ folder). Search by component name and type names used in the file.
Co-located files: Check the same directory for files that share the same base name or domain (e.g., ComponentName.tsx + ComponentName.types.ts + useComponentName.ts).
Dedicated hooks: If the component uses a hook defined nearby, include it.
Barrel exports: Check if the file is re-exported from an index.ts — that index may need updating.

Read the full file on GitHub · 129 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

today First seen · 129 lines · 58 tokens per session scan A b5f0d70e169e

Subscribe to this mod's changes

fsd-migrate is a skill published in the GitHub repository shapediver/AppBuilderSdk (15 stars, last pushed today), licensed MIT. It adds 58 tokens to every session and 1,455 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-13.

3d-graphics 3d-models Frontend augmented-reality shapediver threejs

fsd-migrate next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
fsd-migrateshapediver/AppBuilderSdk	Skill	15	today	MIT	A	58	Claude Code
threejs-engineerbuiphucminhtam/forgewright	Skill	49	3d ago	none	A	65	Claude Code
threejs-ai-skillluisnavarrete12/threejs-ai-skill	Skill	2	4mo ago	MIT	A	213	Claude Code, Codex
3d-ai-studio-apit4ai-workshops/3d-ai-studio-api-skill	Skill	15	3mo ago	none	A	93	Claude Code, Codex
open-prpascalorg/editor	Skill	25k	today	MIT	A	51	Claude Code, Cursor
architectpascalorg/editor	Skill	25k	today	MIT	A	64	Claude Code
blender-modelerarjun988/blender-skills	Skill	2.6k	7d ago	MIT	A	50	Claude Code

AppBuilderSdk: Skill for Claude Code