[sebyx07]

Plan docs/plans/2026/11/11/101-full-stack-efficiency-sweeps, sweep 5a: slice 05 rows E1–E4, E13.

Scale: 6 agents (integrator + 4 feature workers + conformance), 1 independent review (0 High; 2 Medium + 5 Low, all fixed), 1 gate fixer, 1 docs agent; 89 files.

Measured

What	Before	After
per-row filtered write over N ids	N statements in a loop	1 statement (.where(…).updateAll())
1,000 rows, a different value each	1,000 statements	1 (updateMany)
100k rows × 4 cols insert	insertAll ~2.9 s (returning *)	returning:false 0.69–0.73× · copyAll ~1.1 s (COPY, ≤ 50k rows per COPY, one transaction)
a page of 10k × 1 MiB jsonb	decoded whole	refused before decode (X_ENTITY_PAGE_TOO_LARGE, 64 MiB); inBatches halves

What

• E1 db.x.where(…).updateAll(patch) / .deleteAll(): chain terminals (named so Table stays a ReadBuilder), one statement, any operator, tenant-scoped exactly as reads; an empty or undefined predicate is X_WRITE_UNFILTERED; limit/after/search refused. updateWhere/deleteWhere run the same plan.
• E2 updateMany([{ id, patch }]): UPDATE … FROM a table-typed source (a bound VALUES list can't join uuid columns), chunked by binds; same columns, unique non-null ids.
• E3 insertAll/upsertAll { returning: false } → count; copyAll over COPY FROM STDIN (db copyIn/canCopyIn; inside withTransaction too; primary-only under the replica router; insert under row security, since Postgres refuses COPY on RLS tables); target anchored, iterator errors coded.
• E4 byte bound measured on raw rows; refusal names the heaviest column and a pasteable .select({…}).limit(n).
• E13 closed by a live test: reads already cancel through statement-cancel (in-flight and queued).
• Wrappers: sealed, append-only, views, search mirror, row observer, history, defineDriver fallbacks. Conformance: 208 checks × memory, defineDriver, PGlite, Postgres.

Gate

• bun run verify (pre-rebase): reds fixed in the last commit; only the load-sensitive raster test failed under 9 workers (passes alone 3/3).
• scripts/reference-app-gate.ts: all three apps 21/21. After rebase onto 31.8.0: verify --only typecheck,lint,errors,manifest green.

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