Macro-4 Standard IO Contract Cross-System Note — R2-B2 (2026-06-19)
Macro-4 Standard IO Contract Cross-System Note — 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 86 of 90) · Editorial revision: rev1
Class: IO contract cross-system note · READ-ONLY · NON-ENACTING · NON-AUTHORIZING · IO_CONTRACT_OVERREACH guard · NO write performed.
Metadata convention. Editorial revision (rev1) only. Storage revision/
content_lengthauthoritative at read time.
0. Status and non-authorization
STATUS: PASS — engineering / design-only. How the standardized envelope could apply across the system without centralizing it. Engineering PASS ≠ authority PASS. Default: HOLD.
1. Purpose
Note that the IO contract envelope is reusable by other blocks (B1/B3/B4/B6, K-blocks) as a per-block template, never as a shared store.
2. Sources / evidence read
IO contract envelope (19); Registries/Pivot interface (S3/S4/S7/S8 surfaces, carried); no-mega-registry lock (68). Main process, no reader-agents.
3. Accepted baseline (carried)
The accepted 13-field contract template is shared as an interface boundary, not a mega-registry; the Codex split (B1/S3, B6/S4, K3/S6 separate) must be preserved.
4. Evidence / analysis — cross-system reuse (conceptual)
| Block | Would instantiate the envelope as | Coupling |
|---|---|---|
| B1 (registration) | writes S3 identity; own envelope | none with B2 |
B3 (inspect_* contract) |
the stud B2 writes into; own envelope | reference-only |
| B4 (certify consumer) | reads inspect_*; own envelope |
reference-only |
| B6 (canonical map) | writes S4 at promote; own envelope | reference-only |
| K-blocks (KG) | separate lane; own envelopes | none with B2 |
5. Contract / requirement / matrix / result
Each block carries its own envelope; cross-system use is standardization of shape, not a shared mutable surface. Any cross-system store = IO_CONTRACT_OVERREACH → HOLD. This note designs no other block's contract — B2 is the only primary block here.
6. Owner-gated future work
Other blocks' contracts are separate Owner-gated TD-prep packages; not opened here.
7. What remains unresolved
Only B2's contract is instantiated; the rest are referenced as future per-block work.
8. Ready for GPT/Codex review
Yes — Codex should confirm cross-system reuse stays per-block and non-centralizing.