Code modernization engine
The living map of software change
Operational upgrade, migration, and modernization playbooks for real codebases — what changed, what breaks, what to inspect, how to test, and how to roll it out safely.
Operational, not “what’s new”
Every page answers what changed, what breaks, what to inspect, what to run, what the AI agent should do, and how to test and roll back.
Source-backed & verified
Pages cite official docs and changelogs, carry a confidence score, and show a last-verified date. Community nudges keep them honest.
A graph, not a blog
70 interlinked pages across 8+ technology systems — hubs, version paths, workflows, and comparisons that compound over time.
Technology systems
React is the most widely used JavaScript UI library. Major versions ship breaking changes to rendering, refs, and deprecated APIs, creating recurring high-intent upgrade demand.
Next.jsv16Next.js is the most widely deployed React framework. Its major versions ship App Router, caching, async-request-API, and bundler (Turbopack) changes that create recurring high-intent upgrade and migration demand.
TypeScriptv6TypeScript is the typed superset of JavaScript. Each minor release tightens type checking and ships new flags, while the 5.0 line standardized decorators and 6.0 flipped strict, module, and target to modern defaults. TypeScript 6.0 (March 2026) is the last release built on the JavaScript-based compiler before the Go-based native port lands in 7.0 — creating recurring upgrade and JavaScript-to-TypeScript adoption demand.
Pythonv3Python is one of the most widely deployed languages. The Python 2 EOL and the ongoing 3.x cadence (distutils removal, packaging moving to pyproject.toml, the free-threaded/no-GIL build, and the experimental JIT) generate steady high-intent modernization demand.
Node.jsv24Node.js is the dominant server-side JavaScript runtime. Even-numbered majors become LTS on a fixed cadence and each LTS line eventually reaches end-of-life, so teams face recurring high-intent demand to move off EOL Node and onto the active LTS.
Javav26Java is one of the most widely deployed enterprise languages. LTS-to-LTS jumps (8 → 11 → 17 → 21 → 25) bundle the module system, removed Java EE modules, and strong encapsulation of internal APIs, creating recurring high-intent upgrade demand. Java 25 (LTS, GA 2025-09-16) is the current target; Java 26 (non-LTS) is the latest major.
Ruby on Railsv8Ruby on Rails is the dominant full-stack Ruby web framework. Major versions bundle autoloader, asset-pipeline, and infrastructure changes, and upgrades typically touch database migrations and deploy tooling — creating recurring, high-stakes upgrade demand.
Vue.jsv3Vue.js is a progressive JavaScript framework for building user interfaces. Vue 3 (latest stable 3.5.x) is the current line; Vue 3.6, which adds the no-virtual-DOM Vapor Mode, is in beta as of mid-2026. The Vue 2 line reached end of life in December 2023, making the Vue 2 to Vue 3 upgrade — and the Options API to Composition API modernization it unlocks — recurring high-intent demand.