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Nika follows Keep a Changelog. Diamond started at v0.80.0 (2026-04-13). The legacy exploration era (v0.79.3) lives on the private brouillon archive — read-only, never shipped from.
Canonical source: CHANGELOG.md on the main branch. This page curates milestones; the full history lives in the repo. Current HEAD {STATUS.head}.

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Cadence

One crate admission = one commit = one v0.80.0-alpha.N tag (the alpha train below · the scheme rides the current milestone). Every 4 weeks, a blog post or dev log entry. Public accountability, no hidden work.
Since v0.90.0, Nika ships tagged CLI release artifacts. Between release tags, progress is tracked via:
  1. Crate admission commits on main (e.g., feat(nika-X): admit to workspace — all 12 gates passed).
  2. Hygiene vector deployments (currently active, green / yellow / red).
  3. ADR promotions ( total — Accepted, Proposed).

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Recent milestones

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Unreleased
2026-04-17 · Wave 3A + 4A + 4B + Swarm-3 Batch I.b/II

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Added

  • 4 new hygiene vectors (30-33): check-cancel-safety.sh, check-owned-strings.sh, check-unsafe-count.sh, check-layer-deps.sh. Brings the suite to active vectors.
  • Wave 3A post-commit hook — engine commits now trigger Olympus xtask.ts in background, live-refreshing /timeline, /graph/diff, /graph/fitness, /hygiene.
  • Wave 4A reservations — 5 forward-compat seams for v0.95 memory subsystem
    • v0.100 WASM: EmbeddingSpec, MemoryFrameRef.trust, RecallQuery.tenant, WasmPluginError::OutOfFuel + PluginCallContext, MemoryLifecycle trait.
  • Wave 4B telemetry seeds — SpanGuard.parent_span_id + W3C Trace Context linkage; Timestamp(i64 unix_ns) + WallDuration in nika-types::timestamp with RFC 3339 Display (inlined Hinnant civil-from-days).
  • Batch II test depth — 14 new proptest properties (TrustLevel lattice invariants, ID serde roundtrip); Loom #[cfg(loom)] interleaving tests for CancelCtx (INV-029); mutation baseline for nika-error (60 mutants, 31 caught, 13 missed).
  • 5 new ADRs — ADR-029 EmbeddingSpec, ADR-030 MemoryFrameRef trust, ADR-031 RecallQuery tenant, ADR-032 WasmPluginContext, ADR-035 Telemetry seams (all Proposed, arming vector 19).

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Changed

  • Killed vectors 7 (linear-issue-states) and 18 (adr-dangling duplicate of vector 16).
  • ObservabilitySink dropped → 5 sibling channels (Event · Metrics · Trace · Audit · Billing) per Q12 rev.3.
  • Engine hygiene now enforces RED as fail / YELLOW as suggestion for routine pushes (was YELLOW-as-fail — too strict).

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Fixed

  • 34 ADR evidence-path updates (vector 20 GREEN / 127 paths verified).
  • ADR index regenerated 22→30→.
  • FCI §See-also titles corrected + ADR-023..028 added.
  • nika-catalog-verify spec corrected L2 → L4.
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v0.80.0-alpha.4
2026-04-14 · nika-catalog-verify admitted
Crate admitted: nika-catalog-verify (L4, 600 LOC, 9 tests, all 12 gates green). The first L4 interface crate — validates all catalog TOMLs at build time via cargo run -p nika-catalog-verify.
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v0.80.0-alpha.3
2026-04-13 · nika-kernel + nika-kernel-mock admitted
Crates admitted: nika-kernel (L0.5) + nika-kernel-mock (L0.5). 40 ISP traits with sealed supertrait discipline. trait_variant::make for async dynamic dispatch. Pure-memory mocks for hermetic test environments. Preludes re-export nika-types + nika-error types for ergonomic downstream imports.
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v0.80.0-alpha.2
2026-04-13 · nika-catalog admitted
Crate admitted: nika-catalog (L0). TOML-driven provider + model + capability catalog with build-time codegen, perfect-hash lookup, Cow- heavy zero-copy types. providers + capability rules. Schema FK-check enforced in build.rs.
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v0.80.0-alpha.1
2026-04-13 · nika-error admitted
Crate admitted: nika-error (L0). Typed NIKA-XXX error hierarchy, miette integration for L4 diagnostics, per-crate error range allocation, proptest-backed roundtrip invariants.
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v0.80.0-alpha.0
2026-04-13 · Diamond begins
The beginning. Orphan branch created from scratch as nika-diamond (renamed main 2026-05). Legacy main (v0.79.3) abandoned. Forever-v0.x — no v1.0 target. First admitted crate: nika-types (L0 foundation).

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Full history

CHANGELOG.md

Every crate admission, every hygiene vector deploy, every ADR promotion. Source of truth on the main branch.

Commit history

Every commit on the main branch — atomic, bisectable, Co-Authored-By Nika 🦋.

Live state

Current test counts, clippy, hygiene, admitted crate inventory.

Roadmap

What’s next — 1.0.0 public API lock after the release gates are green, 1.x minors completing the 42-crate foundation, then the 2.0 Connectome era and the ecosystem tier.