v16.3.0-canary.26 is a pre-release release. Key changes include:

• [ci] Add an TURBO_TASKS_AVAILABLE_PARALLELISM environment variable that overrides std:🧵:available_parallelism callsites: #93995;
• Make --debug-build-paths work with src/ directory projects: #94016.

v16.3.0-canary.25 is a pre-release release. Key changes include:

• Enable mimalloc in benchmarks: #93388;
• Turbopack: fix subpath imports pointing to external packages: #93308.

v16.3.0-canary.24 is a pre-release release. Key changes include:

• Add nextConfig.instrumentationClientInject: #93785;
• Add MCP compile_route tool: #93337.

v16.3.0-canary.23 is a pre-release release. Key changes include:

• [Turbopack] Add graph-based CSS chunking algorithm behind experimental.cssChunking: "graph": #93606;
• Convert more tests from createNext -> nextTestSetup: #93799.

v16.3.0-canary.22 is a pre-release release: turbo-tasks: prioritize recomputed tasks with recomputation priority: #93876

v16.3.0-canary.21 is a pre-release release. Key changes include:

• Redesign dev overlay: cleaner shell + instant fix-card guidance: #93755;
• Trace middleware/proxy source files in webpack NFT pipeline: #93871.

v16.3.0-canary.20 is a pre-release release. Key changes include:

• [turbopack] fix feature usage telemetry: #93100;
• Add an info panel for the existing "Cache disabled" indicator: #93756.

v16.3.0-canary.19 is a pre-release release: proof of concept: task eviction after snapshot for turbo-tasks-backend: #91790

v16.3.0-canary.18 is a pre-release release. Key changes include:

• Remove redundant instant navigation prefetch header: #93713;
• Instant Insights: Favor reporting errors from all potential navigations over reporting a failed attempt to validate when a slot is missing: #93714.

v16.3.0-canary.17 is a pre-release release. Key changes include:

• Stabilize unstable_io: #93621;
• Use Next.js version as Turbopack persistent cache versioning key: #93605.

v16.3.0-canary.16 is a pre-release release. Key changes include:

• Hold cacheSignal across unstable_cache foreground revalidation: #93617;
• Encode non-ASCII characters in cache tags at construction: #93601.

v16.3.0-canary.15 is a pre-release release. Key changes include:

• [devtools] Force ANSI colors on overlay code frames regardless of TTY: #93550;
• Turbopack: Match proxy matchers with webpack implementation: #93594.

v15.5.18 is a patch release. Key changes include:

• GHSA-8h8q-6873-q5fj: Denial of Service with Server Components;
• GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes.

v16.3.0-canary.14 is a pre-release release. Key changes include:

• perf(ecmascript): shrink JsValue 64→32 bytes: #93106;
• Order loader tree imports by tree depth: #93537.

v16.3.0-canary.13 is a pre-release release. Key changes include:

• Disable instant validations in draft mode: #93472;
• Drop ReferencedAsset::from_resolve_result as a turbotask: #93297.

v16.3.0-canary.12 is a pre-release release. Key changes include:

• Refactor: Decouple request store creation from req / res: #93499;
• Detect 'use cache' module-scope deadlocks early in dev: #93500.

v16.2.5 is a patch release. Key changes include:

• GHSA-8h8q-6873-q5fj: Denial of Service with Server Components;
• GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes.

v15.5.16 is a patch release. Key changes include:

• GHSA-8h8q-6873-q5fj: Denial of Service with Server Components;
• GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes.

v16.3.0-canary.11 is a pre-release release. Key changes include:

• Fix dev mode reload and error on back navigation between Next.js pages: #93486;
• Fix double-encoding of URL pathname parts in client param parsing: #93491.

v16.3.0-canary.10 is a pre-release release. Key changes include:

• Upgrade React from da9325b5-20260417 to f4e0d4ed-20260429: #93457;
• Bump @vercel/ncc: #93459.

v16.3.0-canary.9 is a pre-release release. Key changes include:

• Drop once_cell from all direct crate deps: #93095;
• Replace Lazy static lookups with phf::Map: #93096.

v16.3.0-canary.8 is a pre-release release. Key changes include:

• Revert "Revert "Node.js streams: Add forkpoint for prerenderToStream"": #93376;
• Fix streaming in draft mode for cache components: #93417.

v16.3.0-canary.7 is a pre-release release. Key changes include:

• [test] Preserve Playwright traces on every failure: #93366;
• [ci] Add support for private preview builds: #93375.

v16.3.0-canary.6 is a pre-release release. Key changes include:

• Honor the route-level expire value with blocking revalidation: #93211;
• Turbopack: add experimental.turbopackWorkerAssetPrefix to keep Workers same-origin when assetPrefix is a CDN: #93271.

v16.3.0-canary.5 is a pre-release release. Key changes include:

• Apply sourcemaps by default during prerender in next build: #93280;
• Fix route handler SWR blocking on Node runtime: #93189.

v16.3.0-canary.4 is a pre-release release. Key changes include:

• Preserve __NEXT_ERROR_CODE across the /_error page handoff: #93183;
• Reduce allocations in the next_debug_instant_stack transform: #93222.

v16.3.0-canary.3 is a pre-release release. Key changes include:

• New ESLint rule: no-location-assign-relative-destination: #92900;
• Upgrade React from fef12a01-20260413 to da9325b5-20260417: #92945.

v16.3.0-canary.2 is a pre-release release. Key changes include:

• Improve "make root node" trace attributes: #92941;
• CI: Track SWC native binary size in PR stats comment: #92938.

v16.3.0-canary.1 is a pre-release release. Key changes include:

• Support more prefetch configuration options: #92859;
• Improve deduping of concurrent 'use cache' invocations: #91830.

v16.3.0-canary.26 is a pre-release release. Key changes include:

• [ci] Add an TURBO_TASKS_AVAILABLE_PARALLELISM environment variable that overrides std:🧵:available_parallelism callsites: #93995;
• Make --debug-build-paths work with src/ directory projects: #94016.

v16.3.0-canary.25 is a pre-release release. Key changes include:

• Enable mimalloc in benchmarks: #93388;
• Turbopack: fix subpath imports pointing to external packages: #93308.

v16.3.0-canary.24 is a pre-release release. Key changes include:

• Add nextConfig.instrumentationClientInject: #93785;
• Add MCP compile_route tool: #93337.

v16.3.0-canary.23 is a pre-release release. Key changes include:

• [Turbopack] Add graph-based CSS chunking algorithm behind experimental.cssChunking: "graph": #93606;
• Convert more tests from createNext -> nextTestSetup: #93799.

v16.3.0-canary.22 is a pre-release release: turbo-tasks: prioritize recomputed tasks with recomputation priority: #93876

v16.3.0-canary.21 is a pre-release release. Key changes include:

• Redesign dev overlay: cleaner shell + instant fix-card guidance: #93755;
• Trace middleware/proxy source files in webpack NFT pipeline: #93871.

v16.3.0-canary.20 is a pre-release release. Key changes include:

• [turbopack] fix feature usage telemetry: #93100;
• Add an info panel for the existing "Cache disabled" indicator: #93756.

v16.3.0-canary.19 is a pre-release release: proof of concept: task eviction after snapshot for turbo-tasks-backend: #91790

v16.3.0-canary.18 is a pre-release release. Key changes include:

• Remove redundant instant navigation prefetch header: #93713;
• Instant Insights: Favor reporting errors from all potential navigations over reporting a failed attempt to validate when a slot is missing: #93714.

v16.3.0-canary.17 is a pre-release release. Key changes include:

• Stabilize unstable_io: #93621;
• Use Next.js version as Turbopack persistent cache versioning key: #93605.

v16.3.0-canary.16 is a pre-release release. Key changes include:

• Hold cacheSignal across unstable_cache foreground revalidation: #93617;
• Encode non-ASCII characters in cache tags at construction: #93601.

v16.3.0-canary.15 is a pre-release release. Key changes include:

• [devtools] Force ANSI colors on overlay code frames regardless of TTY: #93550;
• Turbopack: Match proxy matchers with webpack implementation: #93594.

v15.5.18 is a patch release. Key changes include:

• GHSA-8h8q-6873-q5fj: Denial of Service with Server Components;
• GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes.

v16.3.0-canary.14 is a pre-release release. Key changes include:

• perf(ecmascript): shrink JsValue 64→32 bytes: #93106;
• Order loader tree imports by tree depth: #93537.

v16.3.0-canary.13 is a pre-release release. Key changes include:

• Disable instant validations in draft mode: #93472;
• Drop ReferencedAsset::from_resolve_result as a turbotask: #93297.

v16.3.0-canary.12 is a pre-release release. Key changes include:

• Refactor: Decouple request store creation from req / res: #93499;
• Detect 'use cache' module-scope deadlocks early in dev: #93500.

v16.2.5 is a patch release. Key changes include:

• GHSA-8h8q-6873-q5fj: Denial of Service with Server Components;
• GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes.

v15.5.16 is a patch release. Key changes include:

• GHSA-8h8q-6873-q5fj: Denial of Service with Server Components;
• GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes.

v16.3.0-canary.11 is a pre-release release. Key changes include:

• Fix dev mode reload and error on back navigation between Next.js pages: #93486;
• Fix double-encoding of URL pathname parts in client param parsing: #93491.

v16.3.0-canary.10 is a pre-release release. Key changes include:

• Upgrade React from da9325b5-20260417 to f4e0d4ed-20260429: #93457;
• Bump @vercel/ncc: #93459.

v16.3.0-canary.9 is a pre-release release. Key changes include:

• Drop once_cell from all direct crate deps: #93095;
• Replace Lazy static lookups with phf::Map: #93096.

v16.3.0-canary.8 is a pre-release release. Key changes include:

• Revert "Revert "Node.js streams: Add forkpoint for prerenderToStream"": #93376;
• Fix streaming in draft mode for cache components: #93417.

v16.3.0-canary.7 is a pre-release release. Key changes include:

• [test] Preserve Playwright traces on every failure: #93366;
• [ci] Add support for private preview builds: #93375.

v16.3.0-canary.6 is a pre-release release. Key changes include:

• Honor the route-level expire value with blocking revalidation: #93211;
• Turbopack: add experimental.turbopackWorkerAssetPrefix to keep Workers same-origin when assetPrefix is a CDN: #93271.

v16.3.0-canary.5 is a pre-release release. Key changes include:

• Apply sourcemaps by default during prerender in next build: #93280;
• Fix route handler SWR blocking on Node runtime: #93189.

v16.3.0-canary.4 is a pre-release release. Key changes include:

• Preserve __NEXT_ERROR_CODE across the /_error page handoff: #93183;
• Reduce allocations in the next_debug_instant_stack transform: #93222.

v16.3.0-canary.3 is a pre-release release. Key changes include:

• New ESLint rule: no-location-assign-relative-destination: #92900;
• Upgrade React from fef12a01-20260413 to da9325b5-20260417: #92945.

v16.3.0-canary.2 is a pre-release release. Key changes include:

• Improve "make root node" trace attributes: #92941;
• CI: Track SWC native binary size in PR stats comment: #92938.

v16.3.0-canary.1 is a pre-release release. Key changes include:

• Support more prefetch configuration options: #92859;
• Improve deduping of concurrent 'use cache' invocations: #91830.