Modernize frameworks and dependencies

Dependency & Framework Modernization

Modernizing language syntax, framework conventions or third-party dependencies requires grounding every change in the actual installed versions and official migration guides — never guessing APIs from memory or mixing incompatible generational patterns.

1. Version & Deprecation Discovery

Before touching code for an upgrade or modernization task:

1. Inspect manifests and lockfiles: read package.json + lockfile, composer.json + composer.lock, Cargo.toml, pyproject.toml, go.mod or compiler configs (tsconfig.json, php.ini, target runtime settings) to verify exact installed versions.
2. Inventory deprecated usage: search the codebase for deprecated API calls, legacy lifecycle hooks, outdated configuration keys, polyfills and custom monkey-patches.
3. Consult official version migration guides: verify exact breaking changes, changed default options, altered return types and subtle behavioral shifts between the source and target versions.

2. Wrapping Third-Party Boundaries

When upgrading a widely called third-party SDK, HTTP client, ORM helper, validation library or date/crypto utility:

• Isolate vendor specifics behind an internal adapter: if 60 files call a third-party library directly with vendor-specific options, first introduce or tighten a thin internal wrapper so vendor API churn is contained to one boundary.
• Preserve behavioral edge cases across library swaps:
  • Check timezone, locale and daylight-saving semantics when modernizing date/time libraries.
  • Check error throwing vs. status-code resolving (e.g., fetch vs. axios on 4xx/5xx responses, timeout cancellation and retry semantics).
  • Check serialization edge cases (undefined vs. null, BigInt, Date formatting, decimal precision).

3. Phased Modernization Execution

• Separate dependency bumps from unrelated refactoring: do not combine a major framework upgrade, a directory reorganization and business-rule changes in the same step.
• Bridge compatibility first:
  • Upgrade to the latest minor release of the current major version and resolve all deprecation warnings while existing tests pass.
  • Where supported, enable compatibility flags or dual-syntax bridges so modules can be migrated in small, reviewable batches.
• Prefer deterministic codemods and AST rules for mechanical changes: when a framework or language change is purely syntactic across many files, apply consistent transformations and verify every diff rather than hand-editing inconsistently.
• Coordinate with technology specialists: when modernizing framework-specific patterns (such as reactive state, ORM queries, mobile native bridges or desktop IPC), align the target idiom with the corresponding framework specialist.

4. Post-Upgrade Verification

• Run the full typecheck, linter, unit/integration test suite and production build — dev-mode bundlers often hide resolution or tree-shaking issues that fail in production builds.
• Verify runtime startup, configuration loading and at least one end-to-end execution path exercising the modernized dependency.