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Cover of The Zero-Hallucination Migration Harness for Claude Code, Cursor and Copilot, contrasting a risky legacy import with a verified migration path for Spring Boot 3, Next.js App Router and React 19
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The Zero-Hallucination Migration Harness for AI IDEs

Stop AI coding tools from mixing legacy code into your framework upgrades.

Backend and full-stack engineersDigital download

$12.00

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  • Phase 1, AST and breaking change audit: the AI maps every deprecated import and breaking API to its exact replacement in a diff table before writing any code
  • Phase 2, negative-constraint rewrite: code is rewritten with legacy namespaces explicitly banned
  • Phase 3, adversarial sanity verification: the AI audits its own output against common hallucination patterns and gives a pass or fail verdict
  • Works with Cursor, Claude Code, Copilot and ChatGPT
Inside the book

What's inside

  • MIGRATION_HARNESS.md: the universal master multi-phase execution prompt, compatible with any LLM interface
  • Drop-in IDE configs: a .cursorrules snippet for Cursor and a CLAUDE.md repository rule template for Claude Code
  • Playbook, Spring Boot 2.7 to 3.x: Java 17 baseline, javax to jakarta namespace purge, Spring Security 6 Lambda DSL conversion and config refactors
  • Playbook, Next.js Pages Router to App Router: React Server Components, next/navigation routing hooks, async request APIs and metadata APIs
  • Playbook, React 18 to React 19: removes forwardRef and defaultProps, adopts native Context providers, refactors ref cleanup functions and implements useActionState
  • QUICK_START.md: a 3-minute deployment guide with example terminal commands
Who it's for

Built for

  • Backend and full-stack engineers tired of manually cross-referencing migration changelogs
  • Vibe coders and solo founders using AI IDEs who want clean, modern architecture without technical debt
  • Contractors and agencies modernizing legacy enterprise repositories quickly
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