feat: shift-left preset

[rubenmarcus]

Summary

Add a dedicated shift-left preset that combines all Shift-Left QA features into one pipeline:

spec lint → acceptance criteria → tests → implementation → report

Usage

ralph-starter run --from github --issue 42 --preset shift-left

Preset Config

'shift-left': {
  name: 'shift-left',
  description: 'Shift-left QA: spec lint → acceptance criteria → tests → implementation',
  maxIterations: 50,
  validate: true,
  commit: true,
  promptPrefix: 'Follow Shift Left methodology: 1) Validate the spec completeness, 2) Extract acceptance criteria as Given/When/Then, 3) Write failing tests for each criterion, 4) Implement minimum code to pass, 5) Generate shift-left quality report.',
  circuitBreaker: { maxConsecutiveFailures: 5, maxSameErrorCount: 3 },
}

Implementation

• Add preset to src/presets/index.ts
• Add to "Development" category in getPresetsByCategory()

Related

Combines: spec linting, acceptance criteria extractor, test-first, shift-left report.