---
# VERSION: 2.43.0
name: gates
description: "9-language quality gate validation: linting, formatting, type checking, and test execution. Validates code changes meet quality standards before completion. Use when: (1) after code implementation, (2) before PR creation, (3) as part of /orchestrator Step 6, (4) manual quality check. Triggers: /gates, 'quality gates', 'run validation', 'check quality', 'validate code'."
context: fork
user-invocable: true
---

# Gates - Quality Validation (v2.37)

Comprehensive quality validation across 9 programming languages with **TLDR-assisted analysis**.

## Quick Start

```bash
/gates              # Run all quality gates
ralph gates         # Via CLI
ralph gates src/    # Specific directory
```

## Pre-Gates: TLDR Language Detection (v2.37)

**AUTOMATIC** - Detect project languages efficiently:

```bash
# Get codebase structure to detect languages (95% token savings)
tldr structure . > /tmp/project-structure.md

# From structure, identify:
# - Primary language(s)
# - Config files present
# - Test frameworks used
```

## Supported Languages

| Language | Linter | Formatter | Types |
|----------|--------|-----------|-------|
| TypeScript | ESLint | Prettier | tsc |
| JavaScript | ESLint | Prettier | - |
| Python | Ruff | Black | mypy |
| Rust | Clippy | rustfmt | cargo check |
| Go | golint | gofmt | go vet |
| Java | Checkstyle | google-java-format | - |
| Ruby | RuboCop | - | Sorbet |
| PHP | PHP_CodeSniffer | php-cs-fixer | PHPStan |
| Solidity | Solhint | prettier-solidity | - |

## Workflow

### 1. Detect Languages
```bash
# Auto-detect based on file extensions and config files
```

### 2. Run Linters
```bash
# Per-language linting
npx eslint src/          # TypeScript/JavaScript
ruff check .             # Python
cargo clippy             # Rust
golangci-lint run        # Go
```

### 3. Check Formatting
```bash
npx prettier --check .   # JS/TS
black --check .          # Python
rustfmt --check src/     # Rust
gofmt -l .               # Go
```

### 4. Type Checking
```bash
npx tsc --noEmit         # TypeScript
mypy .                   # Python
cargo check              # Rust
go vet ./...             # Go
```

### 5. Run Tests
```bash
npm test                 # Node projects
pytest                   # Python
cargo test               # Rust
go test ./...            # Go
```

## Exit Codes

| Code | Meaning |
|------|---------|
| 0 | All gates passed |
| 1 | Lint errors |
| 2 | Format errors |
| 3 | Type errors |
| 4 | Test failures |

## Gate Configuration

### Minimal (fast)
```bash
ralph gates --minimal    # Lint only
```

### Standard (default)
```bash
ralph gates              # Lint + Format + Types
```

### Full (CI)
```bash
ralph gates --full       # Lint + Format + Types + Tests
```

## Integration

- Invoked by /orchestrator in Step 6
- **Pre-step: tldr structure for language detection** (v2.37)
- Must pass before VERIFIED_DONE
- Hooks: `quality-gates.sh` (PostToolUse)

## TLDR Integration (v2.37)

| Phase | TLDR Command | Purpose |
|-------|--------------|---------|
| Language detection | `tldr structure .` | Identify languages |
| Error context | `tldr context $FILE .` | Understand failing code |
| Impact analysis | `tldr deps $FILE .` | Find related tests |

## Anti-Patterns

- Never skip gates for "quick fixes"
- Never ignore type errors
- Never commit with lint warnings