Current Stable Kernel: v4.2.0-PROD
LTS Channel: Active until Q4 2028
Versioning & Release Engineering
Semantic versioning matrix, breaking change registry, deprecation lifecycle tracker, and migration asset downloads for DISHA 4.0 HCOS.
Live Component Version Matrix
LIVEChangelog Timeline & Breaking Change Alerts
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Major stability release for HCOS Kernel v4.2.0-PROD. Introduces Groth16 BN254 circuit optimizations, .dhc v2.1 container spec finalization, and REST API v1.4 with OpenAPI 3.1 compliance. LTS channel active until Q4 2028.
LAYER UPDATES
HCOS Kernel
- •Upgraded Poseidon BN254 hash sponge to v3.1 spec with 40% throughput improvement
- •Stage 3 enclave TEE attestation now supports AMD SEV-SNP and Intel TDX
- •PIL policy engine now supports ABAC v2 with dynamic attribute resolution
- •Kernel memory isolation hardened against Spectre v4 side-channel variants
.dhc Container
- •.dhc v2.1 container format finalized — backward compatible with v2.0
- •Added native DPDP Act 2023 metadata fields for Indian data sovereignty compliance
- •Container signing now uses Ed25519 + BLS12-381 dual-signature scheme
ZK Circuits
- •ZK-SAD Groth16 circuit verification latency reduced to 14ms on BN254 curve
- •New SkillMatchVerifier.circom v2 with multi-credential batch proof support
- •Poseidon hash root generation now deterministic across all enclave node regions
REST/GraphQL API
- •REST API v1.4.0 — OpenAPI 3.1 spec published with full JSON Schema Draft 2020-12
- •GraphQL Federation v2 gateway deployed across all regional enclave nodes
- •New /api/v1/zkp/verify-skill-proof endpoint with sub-20ms SLA
Enclave SDK
- •Rust SDK v4.2.0-LTS released with async Tokio runtime support
- •Go SDK updated to Go 1.22 with native HSM PKCS#11 interface
- •SDK now ships with pre-compiled Circom witness generator binaries
⚠️ BREAKING CHANGES — Review migration guide before upgrading
⚠️ BREAKING CHANGES — Review migration guide before upgrading