Deno v2.4.5 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: deno · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes

📄 .MD

✨ Features 3 ⚡ Improvements 1 🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Deno v2.4.5. Source highlight: feat(lsp): pull-based diagnostics (#30325)

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

✨ New Features & Capabilities (3)

feat(lsp): pull-based diagnostics (#30325)
feat(unstable/install): `DENO_INSTALL_ARCH` env var (#30473)
feat(unstable/install): more informative deno install output (#30387)

⚡ Performance & Enhancements (1)

perf(ext/net): change the default TCP backlog to 512 (#30471)

🔧 Bug Fixes & Patches (6)

fix(bundle): allow json imports without attribute in deno bundle, support
fix(cache): cache excluded modules explicitly provided on the command line
fix(ext/node): TLS emit close event on parent socket (#30451)
fix(ext/node): `os.setPriority` and `os.getPriority` compatibility (#30383)
fix(ext/node): bad compression caused by invalid brotli params (#30437)
fix(ext/node): export `promises` from stream (#30427)

📄 View Raw Release Notes (Original Developer Log)

### 2.4.5 / 2025.08.21 - feat(lsp): pull-based diagnostics (#30325) - feat(unstable/install): `DENO_INSTALL_ARCH` env var (#30473) - feat(unstable/install): more informative deno install output (#30387) - fix(bundle): allow json imports without attribute in deno bundle, support require of json (#30413) - fix(cache): cache excluded modules explicitly provided on the command line (#30442) - fix(ext/node): TLS emit close event on parent socket (#30451) - fix(ext/node): `os.setPriority` and `os.getPriority` compatibility (#30383) - fix(ext/node): bad compression caused by invalid brotli params (#30437) - fix(ext/node): export `promises` from stream (#30427) - fix(ext/node): mTLS support for `node:tls` (#30426) - fix(ext/node): tls upgrades for used sockets (#30418) - fix(ext/node): validate callback on `fs.mkdtemp` and `fs.stat` (#30454) - fix(fmt): do not remove parens for jsdoc with `@satisfies` (#30453) - fix(lsp): fix import specifiers in file rename changes (#30458) - fix(lsp): silence tsc debug failures for inlay hints (#30456) - fix(node/fs): cp should not create subfolder when both source and target are directories (#30408) - fix(outdated): use version tagged as latest if it satisfies the version req (#30412) - fix(publish): handle precompile in jsx publishing (#30466) - fix(resolver): update "with --unstable-sloppy-imports" message to use "--sloppy-imports" (#30421) - fix(std/fs): implement `chmod` on windows (#30436) - fix(test): set cwd when running node compatibility tests (#30422) - fix(unstable): fix json repl bugs (#30415) - fix(unstable): parsing regex in selector with character class (#30462) - fix: add missing cargo feature to 'deno_npm_cache' crate (#30397) - fix: enable keyring features and dont clear token when config is missing (#30468) - fix: support cjs, cts, mjs, and mts for the `--ext` flag (#30398) - perf(ext/net): change the default TCP backlog to 512 (#30471)

← Older Version Deno v2.4.4 Newer Version → Deno v2.5.0