<objective> SOLID Detection identifies a project's language/framework from its config files (package.json + next/@tanstack/react-start/astro/react, tsconfig.json/bun files, composer.json + laravel, Package.swift/*.xcodeproj, pom.xml/build.gradle, *.csproj/*.sln, go.mod, Gemfile+Rakefile, Cargo.toml, pyproject.toml/requirements.txt) in a fixed priority order, then maps it to the matching SOLID skill and sets `SOLID_PROJECT_TYPE`, `SOLID_FILE_LIMIT`, `SOLID_INTERFACE_DIR`, and `SOLID_STRUCTURE` environment variables via `detect-project.sh`.

An interface found in the wrong location is a hard BLOCK; exceeding the file-size limit or missing documentation is a WARNING only. See language-rules.md for the full per-language interface-location, forbidden-zone, and line-counting rules. </objective>

SOLID Detection Skill

References

• language-rules.md - Load when: resolving the exact interface directory, file-limit, or pattern-detection regex for a specific language (Next.js, React, Generic TS, Laravel, Swift, Java, Go, Ruby, Rust, Python), or counting lines while excluding comments/blanks

Project Detection

Detect project type from configuration files:

# Next.js (priority over React)
[ -f "package.json" ] && grep -q '"next"' package.json

# TanStack Start (priority over React)
[ -f "package.json" ] && grep -q '"@tanstack/react-start"' package.json

# Astro (priority over React)
[ -f "package.json" ] && grep -q '"astro"' package.json

# React (no next / TanStack Start / astro in package.json)
[ -f "package.json" ] && grep -q '"react"' package.json && ! grep -q '"next"' package.json

# Generic TypeScript (no react/next, has .ts files)
[ -f "package.json" ] && ! grep -q '"react"' package.json && ! grep -q '"next"' package.json
[ -f "tsconfig.json" ] || [ -f "bun.lock" ] || [ -f "bun.lockb" ] || [ -f "bunfig.toml" ]

# Laravel
[ -f "composer.json" ] && grep -q '"laravel' composer.json

# Swift
[ -f "Package.swift" ] || ls *.xcodeproj

# Java
[ -f "pom.xml" ] || [ -f "build.gradle" ] || [ -f "build.gradle.kts" ]

# C# / .NET
ls *.csproj *.sln *.slnx 2>/dev/null | grep -q .

# Go
[ -f "go.mod" ]

# Ruby
[ -f "Gemfile" ] && [ -f "Rakefile" ]

# Rust
[ -f "Cargo.toml" ]

# Python
[ -f "pyproject.toml" ] || [ -f "requirements.txt" ]

Priority order: Next.js > TanStack Start > Astro > React > Generic TS > Laravel > Swift > Java > C# > Go > Ruby > Rust > Python

For the full per-language rule tables (interface location, forbidden zones, pattern-detection regex) and line-counting rules, see language-rules.md.

Validation Actions

Severity	Action
Interface in wrong location	BLOCK (exit 2)
File over limit	WARNING (exit 0)
Missing documentation	WARNING

Skill Mapping

Project Type	SOLID Skill	Skill Path
nextjs	solid-nextjs	nextjs-expert/skills/solid-nextjs/
tanstack-start	solid-tanstack-start	tanstack-start-expert/skills/solid-tanstack-start/
astro	solid-astro	astro-expert/skills/solid-astro/
react	solid-react	react-expert/skills/solid-react/
generic	solid-generic	solid/skills/solid-generic/
laravel	solid-php	laravel-expert/skills/solid-php/
swift	solid-swift	swift-apple-expert/skills/solid-swift/
java	solid-java	solid/skills/solid-java/
csharp	solid-csharp	solid/skills/solid-csharp/
go	solid-go	solid/skills/solid-go/
ruby	solid-ruby	solid/skills/solid-ruby/
rust	solid-rust	solid/skills/solid-rust/
python	solid-python	solid/skills/solid-python/

Each solid-<stack> skill defines that stack's own shared locations (DRY "Check shared locations" step) — load it before writing new code; never apply another stack's directories.

Environment Variables

Set by detect-project.sh:

SOLID_PROJECT_TYPE=nextjs|tanstack-start|astro|react|generic|laravel|swift|java|csharp|go|ruby|rust|python|unknown
SOLID_FILE_LIMIT=100|150
SOLID_INTERFACE_DIR=path/to/interfaces
SOLID_STRUCTURE=modular