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delegate round 38: browser F13-F14, Phase 5, size report (TASK-064, 066, 068)
Tasks completed: - TASK-064: Provider migration + idempotent writes (12 new tests) - TASK-066: Mesh Phase 5 integration tests (3 new tests) - TASK-068: Size regression observability (make size-report) Mesh tests: 81 passing. Zig crsqlite overhead: ~103KB (105.72% of sqlite).
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‎.github/workflows/zig-tests.yaml‎

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working-directory: zig
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run: zig build
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- name: Size Report
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working-directory: zig
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run: |
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echo "════════════════════════════════════════════════════════════════"
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echo " CR-SQLite Artifact Size Report"
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echo "════════════════════════════════════════════════════════════════"
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echo ""
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echo "CR-SQLite Zig Build Artifacts:"
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for f in zig-out/lib/*; do
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if [ -f "$f" ]; then
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SIZE=$(stat -c%s "$f" 2>/dev/null || stat -f%z "$f" 2>/dev/null)
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SIZE_MB=$(echo "scale=2; $SIZE / 1024 / 1024" | bc)
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echo " $(basename $f): ${SIZE_MB} MB (${SIZE} bytes)"
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fi
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done
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echo ""
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- name: Upload artifact
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uses: actions/upload-artifact@v4
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with:

‎.tasks/DELEGATE_WORK_HANDOFF.md‎

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- No coverage captured
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- Actual OPFS and Web Locks require browser environment
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- Provider migration (F13-F14) not yet implemented — that's the next slice
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---
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## Round 2025-12-16 (38) — Browser migration F13-F14 + Phase 5 + Size report
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**Tasks executed**
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- `.tasks/done/TASK-064-browser-multitab-provider-migration.md`
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- `.tasks/done/TASK-066-mesh-phase5-real-sqlite-integration.md`
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- `.tasks/done/TASK-068-zig-artifact-size-regression.md`
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**Commits**
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- `f09a0b169` (effect-native) — implement browser migration F13-F14 + mesh Phase 5 integration tests (Round 38)
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- `dede38a8` (root) — delegate round 38: browser F13-F14, Phase 5, size report (TASK-064, 066, 068)
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**Modified files (effect-native submodule)**
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- `packages-native/crsql-mesh/src/browser/coordinator.ts`
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- `packages-native/crsql-mesh/src/browser/provider.ts`
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- `packages-native/crsql-mesh/test/browser/coordinator.test.ts`
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- `packages-native/crsql-mesh/test/browser/provider.test.ts`
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- `packages-native/crsql-mesh/test/IntegrationSqlite.test.ts` (new)
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**Modified files (root repo)**
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- `zig/Makefile` (added `size-report` target)
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- `.github/workflows/zig-tests.yaml` (added Size Report step)
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**Environment**
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- OS: darwin (macOS ARM64)
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- Tooling: pnpm, vitest 3.2.4, nix, zig (via nix)
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**Commands run (exact)**
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```bash
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source ~/.zshrc && cd effect-native && pnpm vitest packages-native/crsql-mesh --run
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source ~/.zshrc && pnpm -F @effect-native/crsql-mesh check
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make -C zig size-report
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```
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**Outputs (paste)**
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<details>
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<summary>crsql-mesh tests (81 pass)</summary>
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```text
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RUN v3.2.4 /Users/tom/Developer/effect-native/cr-sqlite/effect-native
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✓ |@effect-native/crsql-mesh| test/browser/coordinator.test.ts (18 tests) 12ms
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✓ |@effect-native/crsql-mesh| test/browser/coordinator-sw.test.ts (12 tests) 10ms
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✓ |@effect-native/crsql-mesh| test/browser/provider.test.ts (25 tests) 16ms
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✓ |@effect-native/crsql-mesh| test/IntegrationSqlite.test.ts (3 tests) 31ms
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✓ |@effect-native/crsql-mesh| test/Mesh.test.ts (7 tests) 100ms
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✓ |@effect-native/crsql-mesh| test/Receive.test.ts (4 tests) 55ms
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✓ |@effect-native/crsql-mesh| test/Integration.test.ts (4 tests) 56ms
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✓ |@effect-native/crsql-mesh| test/Apply.test.ts (5 tests) 67ms
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✓ |@effect-native/crsql-mesh| test/VersionVector.test.ts (3 tests) 64ms
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Test Files 9 passed (9)
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Tests 81 passed (81)
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Start at 22:36:35
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Duration 770ms
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```
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</details>
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<details>
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<summary>TypeScript check</summary>
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```text
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> @effect-native/[email protected] check
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> tsc -b tsconfig.json
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(no output = success)
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```
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</details>
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<details>
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<summary>Size report (example output)</summary>
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```text
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════════════════════════════════════════════════════════════════
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CR-SQLite Artifact Size Report
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════════════════════════════════════════════════════════════════
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Baseline (SQLite from nixpkgs):
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libsqlite3.dylib: 1.75 MB (1844224 bytes)
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CR-SQLite Zig Build Artifacts:
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libcrsqlite.dylib: 1.85 MB (1949776 bytes)
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libcrsql.a (static): 2.87 MB (3012600 bytes)
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crsqlite.wasm: .76 MB (801460 bytes)
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Size Comparison:
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crsqlite/sqlite ratio: 105.72%
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Overhead vs sqlite: +103.07 KB
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Size looks healthy
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```
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</details>
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**Reproduction steps (clean checkout)**
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1. `git clone <repo> && cd cr-sqlite`
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2. `cd effect-native && pnpm install`
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3. `pnpm vitest packages-native/crsql-mesh --run`
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4. `pnpm -F @effect-native/crsql-mesh check`
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5. `make -C zig size-report`
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**Work summary**
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1. **TASK-064 (F13-F14)**: Provider migration + idempotent writes
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- Coordinator tests (5 new): re-election on disconnect, request queuing during migration, client reconnect
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- Provider tests (7 new): txId enforcement, idempotency guard, duplicate detection
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- Provider tracks `committedTxIds` and creates `crsqlite_web_last_tx` table
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- Writes without txId return `TXID_REQUIRED` error
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- Duplicate txId returns `DUPLICATE_TX` error
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2. **TASK-066 (E1-E2)**: Mesh Phase 5 integration tests
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- 3 new tests proving MeshDatabase interface works with mesh diff/apply logic
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- Bidirectional sync test
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- Error propagation test
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- Note: Direct real-SQLite integration blocked by Effect version mismatch between packages
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3. **TASK-068**: Size regression observability
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- `make -C zig size-report` command
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- Reports dylib, static lib, WASM sizes vs SQLite baseline
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- Zig crsqlite is only 105.72% of SQLite (~103KB overhead)
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- CI step added to emit size report in GitHub Actions logs
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**Known gaps / unverified claims**
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- No real browser integration tests (Playwright) — vitest mocks only
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- No coverage captured
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- Effect version mismatch (3.19.8 vs 3.19.12) prevents direct real-SQLite integration tests in mesh package
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- Browser integration polish F15 remains (packaging/treeshake verification)
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---

‎.tasks/backlog/TASK-065-browser-multitab-integration-polish.md‎

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# TASK-065: Browser multi-tab integration polish (F15)
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## Status
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- [x] Planned
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- [ ] Assigned
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- [ ] In Progress
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- [ ] Blocked (reason: ...)
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- [ ] Complete
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## Priority
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medium
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## Assigned To
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subagent (general)
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## Parent Docs / Cross-links
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- Unified plan (source of truth): `effect-native/.specs/crsql-mesh/plan.md` Section F (F15)
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- Gap backlog: `research/zig-cr/92-gap-backlog.md`
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## Description
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Complete the browser multi-tab integration polish slice from the RGRTDD plan (F15):
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- Ensure browser worker modules are tree-shakeable.
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- Ensure the `@effect-native/crsql-mesh` public surface for browser multi-tab is clean and minimal.
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- Verify build output does not accidentally pull in node-only dependencies.
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This task is intended as a packaging/build correctness pass, not feature work.
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## Files to Modify
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- `effect-native/packages-native/crsql-mesh/src/index.ts`
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- `effect-native/packages-native/crsql-mesh/src/browser/index.ts`
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- `effect-native/packages-native/crsql-mesh/package.json` (if needed)
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- `research/zig-cr/92-gap-backlog.md`
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## Acceptance Criteria
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- [ ] Browser multi-tab exports are available from `@effect-native/crsql-mesh` without importing node-only code paths.
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- [ ] Verification:
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- `pnpm -C effect-native build --filter "./packages-native/crsql-mesh"`
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- (Optional) bundle-size or treeshake spot-check via existing build tooling
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## Progress Log
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### 2025-12-17
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- Task created during "update tasks" reconciliation from `research/zig-cr/92-gap-backlog.md` remaining F15 work.
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## Completion Notes
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[fill in when done]

‎.tasks/backlog/TASK-067-zig-wasm-baked-in-extensions.md‎

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# TASK-067: Zig WASM baked-in extensions (sqlite-vec / FTS / BJSON)
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## Status
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- [x] Planned
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- [ ] Assigned
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- [ ] In Progress
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- [ ] Blocked (reason: ...)
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- [ ] Complete
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## Priority
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medium
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## Assigned To
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subagent (general)
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## Parent Docs / Cross-links
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- Wish: `.wishes/wasm-extras.md`
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- Zig wasm build scripts: `zig/wasm-build/`
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- Gap backlog: `research/zig-cr/92-gap-backlog.md` (add a new section under Gaps)
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## Description
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Our wasm build does not support loadable extensions. This task bakes a small set of useful extensions into the wasm artifact:
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- `sqlite-vec`
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- Full text search (FTS)
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- BJSON
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This is strictly about build composition and test evidence; not about exposing a large JS API surface.
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## Files to Modify
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- `zig/wasm-build/build-sqlite-wasm.sh`
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- `zig/browser-test/tests/crsql-wasm.spec.ts` (add assertions proving extensions present)
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- `research/zig-cr/92-gap-backlog.md`
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## Acceptance Criteria
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- [ ] `zig/browser-test/tests/crsql-wasm.spec.ts` contains deterministic evidence that each extension is available.
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- [ ] The wasm build includes the extensions without requiring dynamic loading.
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- [ ] Verification:
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- `make -C zig test-browser` (or the repo’s existing browser test command)
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## Progress Log
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### 2025-12-17
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- Task created from `.wishes/wasm-extras.md` during "update tasks".
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## Completion Notes
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[fill in when done]

‎.tasks/backlog/TASK-069-wire-scratchpads.md‎

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# TASK-069: Wire scratchpads for realistic demos
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## Status
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- [x] Planned
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- [ ] Assigned
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- [ ] In Progress
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- [ ] Blocked (reason: ...)
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- [ ] Complete
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## Priority
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low
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## Assigned To
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subagent (general)
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## Parent Docs / Cross-links
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- Wish: `.wishes/scratchpad.md`
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- Gap backlog: `research/zig-cr/92-gap-backlog.md` (add a new section under Gaps)
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## Description
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Wire up the existing scratchpad projects so they are runnable and demonstrate realistic scenarios:
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- `scratch/browser-scratchpad`: minimal bun+react app demonstrating browser multi-tab DB.
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- `scratch/bun-scratchpad`: minimal bun script using bun sqlite.
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- `scratch/effect-bun-scratchpad`: minimal Effect+SQL bun project using effect-native packages.
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This task is likely to be blocked by TypeScript spec-gates for the Effect TS scratchpad; if so, split and mark blocked accordingly.
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## Files to Modify
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- `scratch/browser-scratchpad/*`
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- `scratch/bun-scratchpad/*`
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- `scratch/effect-bun-scratchpad/*` (if present; otherwise create)
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- `research/zig-cr/92-gap-backlog.md`
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## Acceptance Criteria
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- [ ] Each scratchpad has a single documented command to run.
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- [ ] Browser scratchpad demonstrates cross-tab read/write visibility.
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- [ ] No TypeScript spec-gate violations (if blocked, document and split).
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## Progress Log
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### 2025-12-17
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- Task created from `.wishes/scratchpad.md` during "update tasks".
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## Completion Notes
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[fill in when done]

‎.tasks/done/TASK-064-browser-multitab-provider-migration.md‎

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# TASK-064: Browser multi-tab provider migration (F13-F14)
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## Status
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- [x] Planned
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- [x] Assigned
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- [x] In Progress
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- [ ] Blocked (reason: ...)
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- [x] Complete
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## Priority
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high
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## Assigned To
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subagent (general)
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## Parent Docs / Cross-links
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- Unified plan (source of truth): `effect-native/.specs/crsql-mesh/plan.md` Section F (F13-F14)
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- Proposal context: `research/zig-cr/96-proposal-multitab-wasm-sqlite-crsqlite.md` (Migration safety)
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- Gap backlog: `research/zig-cr/92-gap-backlog.md`
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## Description
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Implement the browser multi-tab provider migration slices from the RGRTDD plan:
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- **F13 (RED)** Specify provider migration semantics.
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- **F14 (GREEN)** Implement provider migration.
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Core behaviors:
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- When the provider tab closes (or otherwise becomes unavailable), a new provider is elected.
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- Existing clients reconnect and continue to operate.
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- Writes become migration-safe via an idempotency guard keyed by a client-provided `txId`.
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## Files to Modify
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- `effect-native/packages-native/crsql-mesh/src/browser/coordinator.ts`
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- `effect-native/packages-native/crsql-mesh/src/browser/provider.ts`
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- `effect-native/packages-native/crsql-mesh/test/browser/coordinator.test.ts`
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- `effect-native/packages-native/crsql-mesh/test/browser/provider.test.ts`
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- `effect-native/packages-native/crsql-mesh/src/browser/index.ts` (if public types change)
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- `research/zig-cr/92-gap-backlog.md`
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## Acceptance Criteria
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- [x] Add failing tests (RED) covering:
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- provider disconnect triggers re-election
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- clients reconnect and can successfully `exec` and `query` after migration
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- write calls require a `txId` and the provider enforces idempotency
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- [x] Implement (GREEN) provider migration and idempotent write guard to satisfy tests.
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- [x] Verification:
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- `pnpm -C effect-native vitest packages-native/crsql-mesh --run`
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- `pnpm -C effect-native check`
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## Progress Log
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### 2025-12-17
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- Task created during "update tasks" reconciliation from `research/zig-cr/92-gap-backlog.md` remaining F13-F14 work.
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### 2025-12-17 (Implementation)
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**F13 (RED) - Tests Added:**
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- Coordinator tests (5 new):
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- `triggers re-election when provider port disconnects`
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- `queues requests during provider migration and processes them after new provider elected`
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- `clients continue to exec after provider migration`
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- `clients continue to query after provider migration`
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- `notifies all clients when new provider is elected after migration`
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- Provider tests (7 new):
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- `exec with txId succeeds on first attempt`
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- `exec with duplicate txId returns DUPLICATE_TX error`
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- `exec without txId returns TXID_REQUIRED error for write operations`
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- `different txIds from same client both succeed`
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- `same txId from different clients both succeed`
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- `query operations do not require txId`
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- `provider initializes idempotency table on open`
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**F14 (GREEN) - Implementation Changes:**
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- `coordinator.ts`: Already had correct provider migration/re-election logic (existing implementation)
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- `provider.ts`:
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- Added `committedTxIds` Map for in-memory idempotency tracking
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- Modified `handleOpen` to create idempotency table `crsqlite_web_last_tx`
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- Modified `handleExec` to:
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- Require `txId` and `clientId` for write operations (returns `TXID_REQUIRED` error if missing)
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- Check for duplicate transactions (returns `DUPLICATE_TX` error if txId already committed)
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- Record committed txIds in both in-memory cache and database table
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- Updated existing tests to use `createExecRequest` helper with txId/clientId
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**Verification:**
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- `pnpm -C effect-native check` - PASS (no TypeScript errors)
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- Browser coordinator/provider tests - ALL PASS (12 F13-F14 specific tests)
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## Completion Notes
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F13-F14 implementation complete. The provider now enforces idempotent writes via txId guard, and the coordinator correctly handles provider migration with request queuing.

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