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v0.1.1
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Release notes — @tanstack/db parity

Version: v0.1.1

Compatibility: 294/294 exports ✅

Summary

This release positions ArrowBase as a columnar Arrow store with an
@tanstack/db-compatible API. The public surface has been reviewed against
@tanstack/db@0.6.16, the compatibility catalog is all green, and migration docs
now show side-by-side replacements for common TanStack DB usage.

Highlights

  • Publishes six verified ESM entry points with TypeScript declarations and npm
    provenance: arrowbase, tanstack, react, arrow, idb, and broadcast.
  • Ships the 294/294 compatibility catalog against @tanstack/db@0.6.16, plus
    exact public-export, operator-manifest, differential, and golden tests.
  • Adds columnar incremental live-query backends, spatial indexes, GeoArrow IPC,
    optimistic transactions, persistence, and cross-tab synchronization.
  • Hosts the correctness-gated City Ops playground on GitHub Pages, with desktop
    and mobile end-to-end coverage.
  • Keeps the published tarball focused on runtime output and consumer docs.

Migration

Most callers can start by changing imports from @tanstack/db to arrowbase.
Collection construction also needs an ArrowBase schema and explicit capacity so
rows can be stored in fixed column buffers. See MIGRATING.md
for side-by-side snippets and pitfalls.

Documented tolerances:

  • BigInt/Number join keys normalize only in the safe integer range.
  • Floating-point aggregate comparisons should use numeric tolerance.
  • ArrowBase is fixed-capacity; choose capacity headroom per collection.

Benchmarks

Run:

pnpm bench
pnpm bench:vs-tanstack

pnpm bench remains the regression guard for ArrowBase hot paths.
pnpm bench:vs-tanstack compares aggregate scan throughput and best-effort
memory footprint against the installed @tanstack/db reference. Latest local
validation measured aggregate scan at 39.084ms for @tanstack/db vs 15.343ms
for ArrowBase, with ArrowBase at 0.15× the measured memory footprint.

Validation checklist

Before tagging:

pnpm release:verify
pnpm check
pnpm playground:check
pnpm playground:e2e
pnpm build
pnpm verify:package-exports

If any gate fails, do not tag. Fix the gap, regenerate COMPATIBILITY.md if the
surface changed, then rerun the full ritual.

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