Deno v2.6.9 — Release Notes & Engineering Impact

### 2.6.9 / 2026.02.10 - feat(doc): support markdown files (#32024) - feat(upgrade): ability to verify zip archive against checksum (#31804) - feat(upgrade): add context to error messages for better troubleshooting (#32018) - feat: Send reject-ack message through cron socket (#32035) - fix(audit): make 'Path' property more readable (#32049) - fix(cli): pull in tunnel fix for windows (#32033) - fix(compile): use a temporary directory with a node_modules folder when compiling npm specifiers (#32084) - fix(ext/node): Fix `.only` tests compatibilty (#32043) - fix(ext/node): `fs.writeFile` and `FileHandle.writeFile` compatibility (#32077) - fix(ext/node): add `threadName` to worker_threads module (#32072) - fix(ext/node): add `worker.cpuUsage([prev])` API (#32050) - fix(ext/node): add hasColors() to process.stdout and process.stderr (#31985) - fix(ext/node): add stub for ServerResponse.writeEarlyHints (#32029) - fix(ext/node): add zstd compression support to node:zlib (#32025) - fix(ext/node): emit close on both paired MessagePorts (#32092) - fix(ext/node): emit error event for worker with missing main module (#32062) - fix(ext/node): emit error event for worker_threads terminal errors (#32052) - fix(ext/node): fix 'test-worker-process-{argv,env}.js' tests (#32065) - fix(ext/node): fix multiple node:zlib compatibility issues (#32039) - fix(ext/node): handle raw fd instead rid in isatty (#31912) - fix(ext/node): implement Node worker BroadcastChannel ref/unref (#32036) - fix(ext/node): implement Symbol.asyncDispose for node Worker (#32051) - fix(ext/node): implement `DatabaseSync.setAuthorizer()` (#32009) - fix(ext/node): make `child_process` stdio streams Socket instances (#31975) - fix(ext/node): propagate worker exit code from process.exit() (#32061) - fix(ext/node): read from stdin when spawns node with no args (#32088) - fix(ext/node): serialize workerData before resolving worker filename (#32091) - fix(ext/node): set exitCode/signalCode correctly for killed child processes (#32081) - fix(ext/node): unref child_process stdio streams by default (#32071) - fix(ext/node): unref stdin on pause to allow process exit (#32086) - fix(ext/node): validate execArgv and NODE_OPTIONS in worker_threads (#32066) - fix(ext/otel): use correct severity for `console.trace` (#32068) - fix(ext/webgpu): GPUQuene writeBuffer size given in elements of TA (#32031) - fix(flags): extra trailing space in zsh directory completions (#32042) - fix(node/crypto): randomBytes returns buffer with dedicated ArrayBuffer (#32048) - fix(repl): handle EOF gracefully in JSON REPL mode (#32108) - fix(test): user input clearing test runner output (#32082) - fix: `deno info` npm subpath import (#32056) - fix: add raw.esm.sh to default `--allow-import` list (#32030) - fix: flaky cron socket tests (#32023) - fix: run on pre-Windows 10 version 1709 (#32002) - fix: support DENO_SERVE_ADDRESS not being applied to the first server (#31982) - fix: support loading `npm:` and `jsr:` specifiers in required ES modules (#31974) - fix: unstable_cron_socket_serve_reject flakiness caused by control socket coordination (#32053)