Macro-4 No-Mega-Birth-Pipeline Lock — R2-B2 (2026-06-19)

Date: 2026-06-19 · Workstream: R2-B2-MACRO-4-STAGING-WORKBENCH-IO-CONTRACT-TD-ENTRY-GATE-2026-06-19 (Deliverable 70 of 90) · Editorial revision: rev1 Class: no-mega-birth-pipeline lock · READ-ONLY · NON-ENACTING · NON-AUTHORIZING · B2_OVERREACH / MEGA_BIRTH guard · NO write performed.

Metadata convention. Editorial revision (rev1) only. Storage revision/content_length authoritative at read time.

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0. Status and non-authorization

STATUS: PASS — engineering / design-only. Holds B2 to inspect-producer scope; no mega-birth pipeline. Engineering PASS ≠ authority PASS. Default: HOLD.

1. Purpose

Guarantee Macro-4's workbench + IO contracts do not become a fused B1+B2+B3+B4 pipeline.

2. Sources / evidence read

Inspect-producer §12 (2026-03-21 fused INSERT rejection); Macro-3 no-mega-pipeline lock; B2 production-firewall (35). Main process, no reader-agents.

3. Accepted baseline (carried)

B2 must not certify / canonicalize / mint identity / write KG prov / run backlog / flip gates / promote staging→production / become a mega-birth pipeline. The 2026-03-21 fused INSERT ('backfill:dot-birth-backfill', true, now(), now(), now(), now() via SSH+docker exec — collapsing B1+B2+B3+B4) is the explicit anti-pattern.

4. Evidence / analysis — B2 boundary check (CLEAN)

Forbidden over-reach	In Macro-4?
certify (B4)	no
canonical (S4)	no
mint identity (B1/S3)	no
KG provenance (R1)	no
backlog (B5)	no
gate flip (B7)	no
staging→prod promote	no
fused birth-certify INSERT	no

5. Contract / requirement / matrix / result — drift trigger (→ HOLD)

Any deliverable that makes B2 do more than produce candidate/real inspect_* = B2_OVERREACH / MEGA_BIRTH → HOLD. Status this run: NOT triggered. The workbench produces candidate inspect_* only; the IO contracts keep the blocks separate.

6. Owner-gated future work

B2's neighbors (B1/B4/B5/B6/B7, S3/S4) are separate Owner-gated blocks; assembling them must preserve the split.

7. What remains unresolved

B2 boundary holds; neighbors unopened.

8. Ready for GPT/Codex review

Yes — Codex should confirm the workbench + contracts stay separate surfaces, not one pipeline.