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David Snelling b7c6752388 feat: add stddev/variance aggregation ops with Welford's online algorithm 
- New aggregation ops: stddev and variance (incremental, O(1) per update)
- Welford's online algorithm for numerically stable running variance
- MetricState extended with m2 field for variance tracking
- AggregationProvider interface: defineAggregate, removeAggregate, restoreState, serializeState
- Export AggregateGroupState and MetricState types
- Plugin docs: aggregation provider, analytics providers (HyperLogLog, t-digest, etc.)
- Aggregation architecture and usage guide docs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-17 17:04:11 -08:00
..
api feat: add stddev/variance aggregation ops with Welford's online algorithm 2026-02-17 17:04:11 -08:00
benchmarks refactor: remove augmentation system and semantic type matching 2026-02-01 10:48:56 -08:00
comprehensive feat: add stddev/variance aggregation ops with Welford's online algorithm 2026-02-17 17:04:11 -08:00
configs fix: eliminate flaky test timeouts and add storage adapters guide 2026-01-31 09:11:20 -08:00
fixtures/import feat: add intelligent import for CSV, Excel, and PDF files 2025-10-01 16:51:03 -07:00
helpers perf: eliminate N+1 patterns across all APIs for 10-20x faster cloud storage 2025-11-20 15:18:26 -08:00
integration feat: add aggregation engine with incremental SUM/COUNT/AVG/MIN/MAX, GROUP BY, and time windows 2026-02-16 16:57:53 -08:00
integrations feat: Integration Hub for external tool connectivity 2026-01-20 16:21:11 -08:00
manual fix: update tests for v5.1.0 API changes (VFS auto-init + property access) 2025-11-02 11:38:12 -08:00
performance fix: update all Stage 2 references to Stage 3 CANONICAL type counts 2025-11-06 09:40:33 -08:00
regression fix: resolve v5.7.0 deadlock by restoring storage layer separation (v5.7.1) 2025-11-11 15:24:43 -08:00
scripts feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
transaction feat: add v5.8.0 features - transactions, pagination, and comprehensive docs 2025-11-14 10:26:23 -08:00
unit feat: add aggregation engine with incremental SUM/COUNT/AVG/MIN/MAX, GROUP BY, and time windows 2026-02-16 16:57:53 -08:00
vfs fix: flush all native providers on shutdown to prevent data loss 2026-02-01 16:23:49 -08:00
brainy-3.test.ts refactor: remove augmentation system and semantic type matching 2026-02-01 10:48:56 -08:00
critical-error-handling.test.ts feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
critical-neural-validation.test.ts feat: enforce data/metadata separation, numeric range queries, improved docs 2026-02-09 12:07:54 -08:00
critical-performance-benchmark.test.ts feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
distributed-demo.test.ts feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
model-loading.test.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
opfs-storage.test.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
package-size-breakdown.test.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
package-size-limit.test.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
setup-integration.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
setup-unit.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
setup.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
streaming-pipeline.test.ts refactor: remove augmentation system and semantic type matching 2026-02-01 10:48:56 -08:00
type-utils.test.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
typeAwareHNSWIndex.test.ts feat: Phase 2 Type-Aware HNSW - 87% memory reduction @ billion scale 2025-10-15 15:39:28 -07:00