Marketplace core-development

Work on the core package (types, validation, normalization, diff). Use when modifying DSL processing logic or data flow.

install

source · Clone the upstream repo

git clone https://github.com/aiskillstore/marketplace

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/aiskillstore/marketplace "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/7nohe/core-development" ~/.claude/skills/aiskillstore-marketplace-core-development && rm -rf "$T"

manifest: skills/7nohe/core-development/SKILL.md

Core Package Development

The core package (

packages/core/

) is dependency-free and handles all DSL processing.

Data Flow

DSL (YAML input) → validate() → normalize() → IR → diff() → Patch

Key Files

File	Purpose	Exports
`types.ts`	Type definitions	DSL, IR, Patch, WebSocket protocol
`validate.ts`	YAML validation	`validate(dsl): ValidationResult`
`normalize.ts`	DSL → IR conversion	`normalize(dsl): IRDocument`
`diff.ts`	IR diff calculation	`diff(prev, next): Patch`

Type Hierarchy

DSL Types (user input)      IR Types (normalized)
─────────────────────       ────────────────────
DSLDocument                 IRDocument
  ├─ version: number          ├─ version: number
  ├─ docId: string            ├─ docId: string
  ├─ title?: string           ├─ title: string
  ├─ nodes: DSLNode[]         ├─ nodes: Record<string, IRNode>
  └─ edges?: DSLEdge[]        └─ edges: Record<string, IREdge>

DSLNode                     IRNode
  ├─ id: string               ├─ id: string
  ├─ provider: string         ├─ provider: string
  ├─ kind: string             ├─ kind: string
  ├─ label?: string           ├─ label: string (default: id)
  ├─ parent?: string          ├─ parent: string | null
  └─ layout: DSLLayout        └─ layout: { x, y, w, h }

DSLEdge                     IREdge
  ├─ id: string               ├─ id: string
  ├─ from: string             ├─ from: string
  ├─ to: string               ├─ to: string
  └─ label?: string           └─ label: string (default: "")

Patch Operations

type PatchOp =
  | { op: "upsertNode"; node: IRNode }
  | { op: "removeNode"; id: string }
  | { op: "upsertEdge"; edge: IREdge }
  | { op: "removeEdge"; id: string };

interface Patch {
  baseRev: number;
  nextRev: number;
  ops: PatchOp[];
}

WebSocket Protocol Types

// Plugin → CLI
interface HelloMessage {
  type: "hello";
  docId: string;
  secret?: string;
}

interface RequestFullMessage {
  type: "requestFull";
  docId: string;
}

// CLI → Plugin
interface FullMessage {
  type: "full";
  rev: number;
  ir: IRDocument;
}

interface PatchMessage {
  type: "patch";
  baseRev: number;
  nextRev: number;
  ops: PatchOp[];
}

interface ErrorMessage {
  type: "error";
  message: string;
}

Development Workflow

Modify types → Update
```
types.ts
```
Update validation → Ensure
```
validate.ts
```
catches invalid input
Update normalization → Handle new fields/defaults in
```
normalize.ts
```
Update diff → Handle new patch scenarios in
```
diff.ts
```
Add tests → Co-located
```
*.test.ts
```
files
Run tests →
```
bun test packages/core/
```

Testing

# All core tests
bun test packages/core/

# Specific test file
bun test packages/core/src/diff.test.ts
bun test packages/core/src/validate.test.ts
bun test packages/core/src/normalize.test.ts

# Watch mode
bun test --watch packages/core/

Common Patterns

Adding a new node property

Add to
```
DSLNode
```
and
```
IRNode
```
in
```
types.ts
```
Add validation in
```
validate.ts
```
Add default value handling in
```
normalize.ts
```
Update diff logic if property affects equality
Add test cases for validation, normalization, and diff

Adding a new edge property

Add to
```
DSLEdge
```
and
```
IREdge
```
in
```
types.ts
```
Add validation in
```
validate.ts
```
Add default value handling in
```
normalize.ts
```
Update diff logic for edge equality check
Add test cases