NEXUS v0.2.1

NEXUS v0.2.1

Released October 2, 2026.

Highlights

• Local observability foundation: NEXUS now dual-writes safe MCP routing
  metadata to SQLite and the existing JSONL compatibility log. Existing JSONL
  history can be imported locally and idempotently.
• Usage & Cost Dashboard: an optional Tokscale integration displays CLI
  usage and cost aggregates alongside—never merged with—NEXUS-native local
  routing savings.
• Health and retention guidance: the TUI detects optional Tokscale safely
  and warns when NEXUS's configured Claude session-history guidance is below
  30 days.

Thanks, Tokscale

NEXUS v0.2.1 builds on the excellent upstream work from
Tokscale by Junhoyeo and contributors.
Tokscale provides the local CLI usage and pricing aggregates used by this
optional adapter. NEXUS keeps that information distinct from its own routing,
local-latency, and savings metrics.

Upgrade notes

• The MCP server now requires Node.js 22.13 or newer because NEXUS uses the
  built-in node:sqlite API.
• Tokscale remains optional. Install it separately (for example,
  bunx tokscale@latest) to populate CLI usage data.
• NEXUS does not collect raw prompts, responses, URLs, source code, titles, or
  arbitrary provider output. Provider failures are stored only as fixed safe
  categories.