/solid-astro

name: solid-astro
description: Use when applying SOLID principles to an Astro project — file-size limits, src/interfaces/ for types, JSDoc, modular structure, DRY.
versions:
  astro: "7"
user-invocable: true
references: references/solid-principles.md, references/file-limits.md, references/interfaces.md, references/architecture.md, references/dry-enforcement.md, references/jsdoc.md, references/templates/component.md, references/templates/layout.md, references/templates/service.md, references/templates/interface.md
related-skills: astro-7, astro-content, astro-styling, astro-i18n

<objective> Enforces SOLID and DRY architecture on Astro projects: files under 100 lines (split at 90), all TypeScript types moved to `src/interfaces/` (never in component files), mandatory JSDoc on exported functions, no business logic in `src/pages/`, and mandatory grepping for existing logic/utilities in `src/lib/` and `src/components/` before writing new code.

Provides ready-to-copy templates for components, layouts, services, and interfaces that already follow these rules. This is a cross-cutting code-quality skill, not a feature skill — it doesn't teach Astro APIs themselves (see astro-7, astro-content, astro-i18n, astro-styling for that), only how to structure the code that uses them. </objective>

SOLID Astro — Modular Architecture

Agent Workflow (MANDATORY)

Before ANY implementation, spawn 3 agents in parallel, one `Agent` call each with a `name`:

1. **fuse-ai-pilot:explore-codebase** - Analyze project structure, naming, and existing patterns 2. **fuse-ai-pilot:research-expert** - Verify Astro 7 architecture best practices via Context7/Exa 3. **mcp__context7__query-docs** - Check Astro component API and TypeScript integration

After implementation, run **fuse-ai-pilot:sniper** for validation.

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Codebase Analysis (MANDATORY)

Before ANY implementation:

1. Explore `src/` directory to understand existing architecture 2. Read existing similar files to follow established naming and patterns 3. Grep for similar function/component names before creating new ones 4. Identify where interfaces, utilities, and shared logic live

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DRY Enforcement (MANDATORY)

Before writing ANY new code:

1. **Grep for similar logic** — function names, class patterns, component names 2. Check `src/lib/` for existing utilities 3. Check `src/components/` for existing UI components 4. If logic appears in 2+ places → extract to `src/lib/` 5. If types appear in 2+ files → move to `src/interfaces/`

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Absolute Rules

• Files < 100 lines — split at 90
• All types in `src/interfaces/` — never in component files
• JSDoc mandatory on all exported functions
• No business logic in `src/pages/`

See `references/architecture.md`, `references/file-limits.md`, `references/solid-principles.md`.

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Reference Guide

Concepts

| Topic | Reference | When to Consult | |-------|-----------|-----------------| | SOLID principles | [solid-principles.md](references/solid-principles.md) | Architecture decisions | | File limits | [file-limits.md](references/file-limits.md) | When and how to split files | | Interfaces | [interfaces.md](references/interfaces.md) | TypeScript type organization | | Architecture | [architecture.md](references/architecture.md) | Directory structure | | DRY enforcement | [dry-enforcement.md](references/dry-enforcement.md) | Avoiding duplication | | JSDoc | [jsdoc.md](references/jsdoc.md) | Documentation standards |

Templates

| Template | When to Use | |----------|-------------| | [component.md](references/templates/component.md) | Astro component with props + JSDoc | | [layout.md](references/templates/layout.md) | Layout component with slots | | [service.md](references/templates/service.md) | Data fetching service function | | [interface.md](references/templates/interface.md) | TypeScript interface file |

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Forbidden

• Files > 100 lines (split at 90)
• TypeScript interfaces in component `.astro` files
• Business logic in `src/pages/` files
• Direct CMS/API calls in components (use `src/lib/` services)
• Copy-pasting logic instead of extracting shared function
• Missing JSDoc on exported functions, components, and types
• `any` TypeScript type