Deno v2.6.0 — Release Notes & Engineering Impact

### 2.6.0 / 2025.12.10 Read more: http://deno.com/blog/v2.6 - feat(BREAKING/install): require `--` for script arg in `deno install -g` and support installing multiple packages (#31292) - feat(cli): add approve-scripts AKA "approve-builds" subcommand (#31472) - feat(cli): filter out common internal frames that add noise, dim and grey internal frames in stack traces (#31247) - feat(cli): print working dir in grey in stack traces, relative paths in check + compile output (#31194) - feat(config): allow storing npm constraints to allow running lifecycle scripts for (#31075) - feat(coverage): add dark-mode toggle for html output (#31140) - feat(ext/node): implement FileHandle.appendFile(data[, options]) (#31301) - feat(ext/web): add `ImageData` `Float16Array` support (#31394) - feat(ext/web): stabilize `BroadcastChannel` (#30770) - feat(ext/web): transferable {Readable,Writable,Transform}Stream (#31126) - feat(init/npm): add --yes flag to bypass prompt (#31499) - feat(install): add `--lockfile-only` flag (#31376) - feat(lint): plugin API has env and read access (#31327) - feat(node): allow subpath imports that start with '#/' (#31520) - feat(permissions): allow `Deno.env.toObject()` for partial env permission (#31267) - feat(permissions): allow flags should override deny when more specific (#31224) - feat(process): support integer signals in Deno.kill and child.kill (#31153) - feat(unstable): add socket.dev integration for `deno audit` (#31106) - feat(unstable): support authenticated socket.dev audit reports (#31370) - feat(upgrade): ability to show additional message on upgrade (#31170) - feat: V8 14.2 (#31178) - feat: `--ignore-read` (#31363) - feat: `deno init --empty` (#31516) - feat: add --require run arg to support commonJS (#31201) - feat: add Float16Array support (#31410) - feat: add `--ignore-env=...` (#31187) - feat: add `deno x` (alias `dx`) for conveniently running binaries from packages (#31138) - feat: add native source maps support (#31268) - feat: include `@types/node` type declarations out of the box (#31502) - feat: support `publish: false` in `deno.json` (#30852) - feat: use Node.js timers by default (#31272) - feat: wasm source phase imports (#31486) - fix(audit): remove unwrap in favor of log, don't print empty reports (#31479) - fix(bundle): Deno.bundle work in Worker (#31316) - fix(bundle): avoid name clash in hack (#31409) - fix(bundle): do not error on failing to clean up esbuild dir (#31408) - fix(bundle): don't use createRequire when targeting browser in Deno.bundle (#31534) - fix(bundle): fix import.meta.main transform with jsr entrypoint (#31415) - fix(bundle): support android (#31521) - fix(bundle): treat bun specifiers as external by default (#31411) - fix(check): ensure `@types/node` is cached when already in resolution (#31235) - fix(check): fix nil deref with `--unstable-tsgo` (#31416) - fix(check): move types not found error to tsc diagnostic (#31509) - fix(check): move unknown builtin node: module errors to tsc diagnostics (#31449) - fix(cli): make --eval-file flag work without equals sign (#31151) - fix(cli): put tasks first in zsh dynamic completions (#31350) - fix(compile): support --preload flag in deno compile (#31152) - fix(config): support UTF-16 surrogate pairs in unicode escape sequences in json config (#31264) - fix(deps): use windows-sys for all windows targets (#31308) - fix(ext/napi): suppress deprecated Buffer warnings (#31245) - fix(ext/net): support IPv6 zone indices in Deno.connect() (#31123) - fix(ext/node): Add sqlite `setAllowUnknownNamedParameters` option (#31202) - fix(ext/node): FileHandle compatibility (#31164) - fix(ext/node): `StatementSync.iterate()` should reset `is_iter_finished` flag on every call (#31361) - fix(ext/node): `url.domainToASCII` returns empty string for invalid domains (#31219) - fix(ext/node): autopadding behavior on `crypto.Cipheriv` (#31389) - fix(ext/node): define process.versions.sqlite (#31277) - fix(ext/node): ensure 'exit' event is fired only once for `worker_threads` (#31231) - fix(ext/node): export ppid (#31137) - fix(ext/node): fix sqlite extension used for testing; ensure related tests are actually meaningful (#31455) - fix(ext/node): implement `DatabaseSync.aggregate()` (#31461) - fix(ext/node): implement `DatabaseSync.function()` and better error details (#31386) - fix(ext/node): implement `dns.lookupService` (#31310) - fix(ext/node): implement `process.setegid()` (#31155) - fix(ext/node): implement `process.setgid()` and `process.setuid()` (#31162) - fix(ext/node): implement `process:seteuid()` (#31160) - fix(ext/node): implement performance.timerify() (#31238) - fix(ext/node): implement util.getSystemErrorMessage() (#31147) - fix(ext/node): prevent cipher operations after finalize (#31533) - fix(ext/node): reimplement `setImmediate` API (#30328) - fix(ext/node): respect abort signal option on `FileHandle.readFile` (#31462) - fix(ext/node): respects `flag` option on `fs.readfile` and `fs.readfilesync` (#31129) - fix(ext/node): segfault on calling `StatementSync` methods after connection has closed (#31331) - fix(ext/node): sqlite `setAllowUnknownNamedParameters` error message (#31319) - fix(ext/node): sqlite.DatabaseSync explicit resource management compatibility (#31311) - fix(ext/node): truncate first non-hex value on Buffer.from (#31227) - fix(ext/signals): don't run exit hooks at non-exit times (#31269) - fix(ext/web): Event dispatch should continue after reporting exception (#31297) - fix(ext/web): console.dir respects indent level (#31412) - fix(install): report installed npm packages when not using node_modules, fix double counting (#31536) - fix(install): rewrite node_modules .bin shim generation for windows to be like npm (#31494) - fix(lsp): `organizeImports` without resolving specifiers (#31230) - fix(lsp): don't provide organizeImports action when client provides it (#31530) - fix(lsp): lint-ignore directives follow leading comments (#31200) - fix(lsp): set lockfile_skip_write unconditionally (#31191) - fix(lsp): store assigned compiler options for cache files (#31377) - fix(node): ensure process.argv is an array of strings (#31322) - fix(node): missing `statfs` export from `node:fs/promises` (#31528) - fix(node): stub missing process.sourceMapsEnabled (#31358) - fix(node): support advanced serialization in IPC (#31380) - fix(node/assert): deepStrictEqual now correctly handles Number objects (#31233) - fix(node/crypto): respect authTagLength in createCipheriv for GCM cip… (#31253) - fix(node/net): return string `family` in `server.address()` (#31465) - fix(node/process): make `process.stdin.isTTY` writable (#31464) - fix(node/timers): ensure active timers entry is deleted on `Timeout.prototype.refresh` (#31436) - fix(node:console): ensure that the node:console implementation has an implementation for `emitWarning` in scope (#31263) - fix(resolver): fall back to execution if can't resolve types (#31507) - fix(schema): add bundle to unstable field schema (#31395) - fix(test): Remove ANSI Escape Codes for Junit Reports (#30854) - fix(tsgo): do not error out on non js/ts imports from npm packages (#31478) - fix(tunnel): misc fixes (#30968) - fix(types): add [Symbol.iterator]() to NodeListOf (fixes #31382) (#31384) - fix(unstable): don't panic on invalid reported lint range (#31261) - fix: `is_elf` panic in sui (#31388) - fix: change errors message suggesting to run approve-scripts (#31493) - fix: clippy::derivable_impls (#31460) - fix: fetch fd leak (#31375) - fix: fix npx running in test, make approve-scripts test less flaky (#31501) - fix: make '@types' package resolution more consistent (#31512) - fix: skip doing npm resolution in more cases (#31305) - fix: update JSDoc for Deno.cwd() API (#31256) - fix: update deno_error to 0.7.1 (#31450) - fix: update permission-broker-response.v1.json (#31328) - fix: upgrade denokv_* to 0.13 and rusqlite to 0.27 (#31374) - fix: upgrade to swc_ecma_parser 27 (#31427) - fix: wpt assert expectation correctly even if the filter has a layer (#30574) - perf(node): implement getOwnNonIndexProperties in native code (#31393) - perf(node): optimize Buffer compare (#31425)