v4.12.29

ogx-ai/ogxv4.12.29Jul 10, 2026by yusukebe

AI Summary

This release focuses on resolving bugs in Lambda Edge and AWS Lambda adapters, including content-encoding and handler resolution issues. It also enhances type safety within the JSON parsing logic and updates documentation and test configurations.

Key Highlights

Fixed Lambda Edge handler resolution and base64 encoding for content-encoded responses
Improved type safety in JSONParsed by stripping extra array properties
Fixed AWS Lambda to treat non-identity content-encoding as binary
Updated trie-router to correctly match empty wildcard remainders after regexp parameters

Full Release Notes

## What's Changed
* fix(client): merge function headers with per-request headers by @yusukebe in https://github.com/honojs/hono/pull/5092
* chore: fix no-op tsc in test script by @yusukebe in https://github.com/honojs/hono/pull/5093
* fix(lambda-edge): resolve the handler with the value passed to the callback by @yusukebe in https://github.com/honojs/hono/pull/5094
* docs(language): add JSDoc @example to languageDetector by @codebybilal18 in https://github.com/honojs/hono/pull/5081
* test(workerd): add `compatibilityDate` by @yusukebe in https://github.com/honojs/hono/pull/5100
* fix(lambda-edge): base64 encode content-encoded response bodies by @yusukebe in https://github.com/honojs/hono/pull/5099
* fix(aws-lambda): treat any non-identity content-encoding as binary by @yusukebe in https://github.com/honojs/hono/pull/5101
* fix(types): strip extra properties from array types in JSONParsed by @Arman-Luthra in https://github.com/honojs/hono/pull/5103
* fix(trie-router): match empty wildcard remainder after regexp param by @usualoma in https://github.com/honojs/hono/pull/5102
* fix(etag): treat If-None-Match: `*` as a match by @yusukebe in https://github.com/honojs/hono/pull/5084

## New Contributors
* @codebybilal18 made their first contribution in https://github.com/honojs/hono/pull/5081
* @Arman-Luthra made their first contribution in https://github.com/honojs/hono/pull/5103

**Full Changelog**: https://github.com/honojs/hono/compare/v4.12.28...v4.12.29