v2026.13.1

=== Breaking changes ===
3695329b9 Implement rounding for decimal float literals (#11783)

=== All changes for this release ===
c0952c29d Update SPIRV for VulkanSDK July 2026 (#12057)
6cdb7601e Fix #11903: diagnose native-only HitObject::Invoke on NVAPI SER target (#11907)
cd1e9bc99 Give Slang exception classes default type visibility to fix cross-dylib catches on macOS (#11910)
01adc68f3 Apply AVX-512 JIT workaround to all CI tests (#12056)
4676e878e Reuse bundled Vulkan headers for slang-rhi (#12033)
85d79c676 Fix quadratic IR type legalization on straight-line functions (#12041)
7e1c9b144 compile-perf: constant report panel order + enable api workloads in the tracked nightly (#11998)
29767f336 Language reference: operator expressions and value categories (#11953)
dba2ab40d Add ASCII check for shipped headers and preludes to formatting CI (#12037)
b721cb68e compile-perf: rt_renderer — generated renderer-shaped corpus (Phase 2) (#12003)
fe284bf9f Add conversion tests between all fundamental scalar types (#12020)
258a984c1 Don't warn E31106/E31107 on compiler-synthesized parameter groups (#11986)
95315356a Fix #7878: diagnose default-construct of opaque handle instead of crashing (#11971)
06d69d1d1 compile-perf: HLSL/GLSL/CUDA emit workloads + DXIL/PTX downstream workloads (#12000)
824e24f26 Allow arithmetic in lifted differentiable constraints (#12029)
413398f99 Fix shader-slang/slang#11859: move user-defined derivative [require] to the differentiation use-site (#11872)
caa2ff456 Fix quadratic callee side-effect queries in the simplifyIR fixpoint (#11954)
b64d495d9 Mark vector subscript accessors differentiable (#12026)
cffff65f9 Gate lowerTaggedUnionTypes (#11917) (#11961)
288fecef9 Fixes GitHub issue #7894 (makes reflection and SPIR-V agree on `layout(local_size) in`) (#11715)
b264071b8 Support implicit Optional<T> -> Optional<U> covariant conversion (#12013)
58d433809 coverage: fix agentic pass in-process crashes and FileCheck-pattern test bugs (#12024)
[BREAKING] 3695329b9 Implement rounding for decimal float literals (#11783)
a97110a43 compile-perf: add API-path workloads (session create, many kernels, module graph) (#11976)
a47c1b885 Fix invalid SPIR-V for float-to-bool cast in direct SPIR-V emit (#12019) (#12021)
6fad2f01d Allow DescriptorHandle to implicitly convert to ConstantBuffer (#11681) (#11685)
135c93518 Fix #12016: replace em-dashes with ASCII hyphens in slang.h (#12018)
08af86542 tests-agentic: update round for docs/generated/tests against the regenerated design docs (#12017)
468adc556 Harden Claude review workflows and align REVIEW.md with the pre-staged diff protocol (#11993)
5d5183617 Fix #12007: scope reflection-api example [require] to hlsl_spirv (#12008)
0a02eae1b Use native CoopVec in MLP training sample (#12010)