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Detailed per-release notes live in the repo’s CHANGELOG.md. This page is a human-readable overview. For the authoritative list, see github.com/sint-ai/sint-protocol/blob/main/CHANGELOG.md.

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v0.2 — April 2026

Major release. Protocol foundation laid, all twelve bridges shipping, conformance suite at 157 tests, 1,772 tests passing overall. Breaking changes:
  • Tier model consolidated from T1–T5 to T0–T3. Migration required for any v0.1 deployments.
  • License for code confirmed as Apache-2.0 (some earlier docs erroneously listed MIT — now aligned).
  • CSML definition locked as “Composite Safety-Model-Ledger” (earlier docs used “Continuous Safety Monitoring Language”).
Added:
  • Twelve transport bridges (MCP, ROS 2, A2A, IoT, MQTT Sparkplug, OPC UA, Open-RMF, gRPC, MAVLink, Swarm, Economy, HAL)
  • Six formal invariants with informal proof sketches
  • STRIDE+B threat model with worked attack chains
  • 157-test conformance suite
  • Compliance crosswalk (IEC 62443 / EU AI Act / NIST AI RMF / ISO 42001)
  • Machine-readable tier crosswalk at /v1/compliance/tier-crosswalk
  • Academic whitepaper (arXiv preprint in submission)
Changed:
  • Policy Gateway latency target tightened to p99 < 3ms for T0
  • Evidence Ledger now requires SHA-256 hash chain with TEE signature option
  • Capability token schema expanded with physical constraints block
Deprecated:
  • v0.1 tier labels (T1–T5); will be removed in v0.4
  • Legacy /gate URL path; use /v1/intercept instead
Removed:
  • /v0/ API surface

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v0.1 — Q3 2024

Initial public release. Proof-of-concept gateway, basic token model, in-memory ledger.

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Pre-v0.1 — 2024

Development snapshots. Not versioned publicly.

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Brand transition (April 2026)

SINT Labs refocused from consumer Web3 agent work (archived at /archive) to physical-AI governance and the current product stack. Not a semver change to the protocol — a company-level direction change. What changed:
  • Brand and positioning aligned to lab + products + studio
  • @sinthive → @sintlabs on X (handle rename, follower-preserving)
  • Earlier Web3 content moved to /archive/*
  • March 2025 whitepaper moved to /archive/2025-whitepaper
  • docs.sint.gg reorganized around Getting Started / Protocol / Products / Developers / Archive
What didn’t change:
  • Existing $SINT token-holder commitments
  • Telegram community (channel renamed, content preserved)
  • GitHub organization (sint-ai remains canonical)
  • All existing protocol code and documentation

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Versioning policy

SINT Protocol follows semantic versioning:
  • Major (v1 → v2): breaking API or schema changes
  • Minor (v0.2 → v0.3): backwards-compatible additions
  • Patch (v0.2.0 → v0.2.1): bug fixes only
Pre-1.0 minor versions may include breaking changes, announced at least one minor version in advance.