chore(board): scaffold sprint-log-5-6 for parallel sprint-5 close + sprint-6 kick-off

12-worker fleet (Sonnet) + 1 meta (Opus) spawned for combined
sprint-5/sprint-6 parallel batch. Workers write specs under
.claude/specs/ and scratchpads under .claude/board/sprint-log-5-6/
agents/. Meta review aggregates after all 12 return.

Roster captured in SPRINT_LOG.md. Scratchpad dir tracked via
.gitkeep so per-agent files prepend cleanly when they land.

Author: claude

.claude/board/sprint-log-5-6/SPRINT_LOG.md

@@ -0,0 +1,24 @@
+# sprint-log-5-6 — parallel sprint-5 spec close-out + sprint-6 spec kick-off
+
+> **Started:** 2026-05-13 | **Branch:** claude/lance-datafusion-integration-gv0BF
+> **Substrate shipped:** lance-graph #364 + MedCare-rs#112 + smb-office-rs#31 + ndarray#142 (all 2026-05-13)
+> **Worker fleet:** 12 Sonnet workers + 1 Opus meta. CCA2A: each worker tee -a's to .claude/board/sprint-log-5-6/agents/agent-W{N}.md and prepends to .claude/board/AGENT_ORCHESTRATION_LOG.md.
+> **Spec output:** 1 file per worker under .claude/specs/.
+> **Scope:** sprint-5 W7-W12 (specs only, substrate already shipped pre-merge) + sprint-6 W2-W4, W7-W10 (Tier-2 wiring specs).
+
+| W | Sprint | Spec | Status |
+|---|---|---|---|
+| 1 | S5-W7 | .claude/specs/pr-d3a-lance-audit-sink.md | pending |
+| 2 | S5-W8 | .claude/specs/pr-d3b-jsonl-and-verify.md | pending |
+| 3 | S5-W9 | .claude/specs/pr-d4-family-hydration.md | pending |
+| 4 | S5-W11 | .claude/specs/sprint-5-ci-matrix.md | pending |
+| 5 | S5-W12 | .claude/specs/sprint-5-pr-graph.md | pending |
+| 6 | S6-W2 | .claude/specs/pr-e1-medcare-super-domain.md | pending |
+| 7 | S6-W3 | .claude/specs/pr-e2-smb-retrofit.md | pending |
+| 8 | S6-W4 | .claude/specs/pr-e3-woa-rs-extract.md | pending |
+| 9 | S6-W7 | .claude/specs/pr-f1-thinking-engine-wire.md | pending |
+| 10 | S6-W8 | .claude/specs/pr-g1-manifest-modules.md | pending |
+| 11 | S6-W9 | .claude/specs/pr-g2-ractor-supervisor.md | pending |
+| 12 | S6-W10 | .claude/specs/sprint-6-conformance-test.md | pending |
+| M | both | .claude/board/sprint-log-5-6/meta-review.md | pending (post-workers) |
+