# Changelog

## 1.0.0 - 2026-08-28

- Preserve the six-function CommonJS API and observable stack, eval, source
  excerpt, map lookup, custom retrieval, and environment behavior of
  `source-map-support@0.5.21`.
- Preserve `register`, `register-hook-require`, the standalone browser
  CommonJS/global/named-AMD contract, and the legacy browser remap; add a
  companion browser ESM host for root browser-condition imports.
- Verify the residual `vm.runInThisContext()` mapping case against native Node
  source-map behavior while recommending native maps for ordinary modern Node
  execution.
- Replace the historical `source-map` and `buffer-from` production graph with
  exact `@jridgewell/trace-mapping@0.3.31` and its two exact MIT transitive
  dependencies; use `AnyMap` for regular and indexed/sectioned Source Map v3
  payloads while retaining section offsets, names, and embedded source text.
- Resolve URL-based map sources without treating URL hosts as local paths.
- Release generated file contents after unsuccessful map discovery to avoid
  indefinite retention of unmapped source text.
- Cache malformed maps and misses, use null-prototype caches, and preserve
  generated positions when parsing or lookup fails.
- Resolve browser-relative map/source paths without a Node `process` global.
- Decode UTF-8 inline browser maps without requiring a Buffer polyfill and
  treat malformed base64 as a retrieval miss rather than an `atob()` failure.
- Preserve uncaught `Error.cause` output and existing nonzero exit codes.
- Retain current native V8 formatting for differently named property aliases.
- Add a side-effect-free ESM-host root, first-party TypeScript declarations,
  conditional exports, exact package metadata, and current release checks.
- Restore explicit V8 BSD 3-Clause attribution for copied
  `CallSiteToString` code while retaining Evan Wallace's upstream MIT notice.
- Retain exact MIT notices for the three bundled @jridgewell components and
  `path-browserify` in both packed browser artifacts.