Mega Gate — B2 Actual TD Entry Gate
Mega Gate — B2 Actual TD Entry Gate
Date: 2026-06-18 · Workstream: LEGO-PILOT-SLICE-0-B2-MEGA-GATE-BUNDLE-2026-06-18 (Deliverable 7 of 20) · Editorial revision: rev1
Class: design-only / TD entry gate / decision-support · READ-ONLY · NON-ENACTING · NON-AUTHORIZING · NOT remediation · NOT technical design · NOT implementation · NO blocker resolved · NO runtime touched.
Metadata convention. Editorial revision (rev1) only. AgentData storage revision and
content_lengthare authoritative in AgentData metadata at read time; not pinned in this body.
Entry-gate lock. This packet defines the gate that must be Go before actual B2 TD may start — and states that the gate is No-Go today. It writes no actual technical design (no schema/DDL/table/migration/function body/SQL-mutate/scheduler/runner/command-sequence/rollback-script). If any such content appears, that is
ACTUAL_TD_DRIFT→ HOLD. Opening TD is an Owner act, not this packet's.
0. Status and non-authorization
STATUS: PASS — engineering / design-only. This is a complete design-only TD entry gate: the Go criteria to open actual B2 TD (mapped to G-1…G-11 + PO-1…9), the aggregate verdict (No-Go), what an Owner may waive (with the caveat recorded), what cannot be waived under any waiver, and the order in which the gate clears.
Engineering PASS ≠ authority PASS. A PASS means the entry gate is fully specified on paper. It does not open TD, does not declare the gate met (it is not), and is not an Owner authorization to start TD. Default disposition: HOLD.
Pipeline position (downstream-only). Deliverable 7 of the Mega Gate Bundle; it sharpens Deliverable B's Go/No-Go (carried) into the explicit entry gate an Owner uses to decide whether actual B2 TD may start. It opens no TD.
Non-authorization (explicit). As Deliverable 1 §0, and specifically: it writes no actual TD; opens no TD; declares no readiness met; selects no channel; resolves no blocker. v0.1/FIX7 V3 not overwritten; v0.2 not authority.
Evidence basis — INHERITED_EVIDENCE. No runtime queried. Readiness facts inherited from accepted reports. AgentData metadata authoritative at read time. CAV-3/CAV-4/CAV-5 carried.
Reading discipline (Codex caveat, honored). All sources read directly from AgentData KB, bounded/sequential, by the main process — no parallel/background reader-agents, no sub-agents, no local-prose inference. /tmp = decode-scratch only, never SSOT.
1. Purpose
Answer the macro's fifth and (gate side of the) first question: what gate must be Go before actual B2 TD can be opened, and what may an Owner waive? The packet answers:
- What are the entry-gate criteria? — §5 gate table.
- What is the aggregate verdict today? — §5 (No-Go).
- What can the Owner waive (with caveat)? — §5 waiver column.
- What cannot be waived under any waiver? — §5 hard-floor.
- In what order does the gate clear? — §5 ordering.
The one rule, above all detail. Actual B2 TD may start only when the gate is Go (or an Owner explicitly accepts a waivable No-Go with the caveat recorded); some criteria are a hard floor that no waiver can cross (they would make TD unsafe or fail-open). This packet defines the gate; it writes no TD and opens none.
2. Sources read
All 25 required sources read first-hand from AgentData KB, by the main process, sequentially; none SOURCE_NOT_READ (full list in Deliverable 20 §2). Used principally: Deliverable B (G-1…G-11; PO-1…9; F-1…F-8); the B2 TD-prep packet (the contract, B2-AC-1…14, the §8 bad-input matrix); Deliverable 2 (closure routes); Điều 32 (DOT-100%; new/fix-DOT scope); Điều 4 note (birth≠canonical, promote-checker); operating-rules (fail-closed default).
3. Accepted baseline (carried, not re-derived)
- Aggregate B2 TD is No-Go (Deliverable B §14): 1 Go (frozen contract), 5 No-Go (Đ0-G source; channel; S2 owner; staging; CONS/CELL+Đ0-G prereqs), 5 Partial (B3/B4 re-confirm; S7 writers; S8 mechanism+downstream-certify; bad-input runtime tests; B7 warn-mode+GUC).
- The nine proof obligations (PO-1…PO-9), none satisfied (carried from the B2 TD-prep §15).
- Codex acceptance: "Actual B2 TD aggregate No-Go today" (planning-bundle review). "No actual TD opened."
- B2's contract is frozen (F-1, Go) — the entry gate designs the conditions to act on the contract, not the contract.
- Blockers — all OPEN. Tool/packet lock carried.
4. Analysis — gate, waiver, hard floor
An entry gate has three parts:
- The criteria — the conditions that must be Go (here, G-1…G-11 mapped to PO/F).
- The waivable set — criteria an Owner may explicitly accept as not-yet-Go with the caveat recorded, because the resulting TD risk is bounded and recoverable (e.g. designing against the working-source Đ0-G rule-set, if the caveat is recorded and STAMP/GATE flagged as least-precedented).
- The hard floor — criteria no waiver can cross, because crossing them makes TD unsafe or fail-open (e.g. a TD that designs the producer to certify, or to write canonical, or that selects a channel by leaking it into the contract, or that proceeds with no rollback unit). The hard floor is the set of B2 anti-coupling invariants and the LEGO/fail-closed defaults.
Distinguishing waivable from hard-floor is the safety core of the gate: a waiver trades readiness completeness for schedule, but never trades away fail-closure or block isolation.
5. B2 actual-TD entry gate
Gate criteria (carried from Deliverable B §14; "waivable?" and "clearing route" added). Aggregate verdict: NO-GO.
| Gate criterion | Maps to | Status today | Waivable by Owner? | If waived, the caveat that must be recorded | Clearing route (Deliverable 2) |
|---|---|---|---|---|---|
| GATE-1 B2 13-field contract frozen | G-1 / F-1 | Go | n/a | — | (already Go) |
| GATE-2 B3 stud stable + B4 consumer re-verified | G-2 / PO-5 | Partial | Partly — TD may start on the carried shape if a runtime re-confirm is scheduled as the first TD step | "B3 shape carried, not runtime-reconfirmed; re-confirm is GATE-2 of TD" | R/O re-verify (Macro-1) |
| GATE-3 Điều 0-G rule-set authoritative | G-3 / PO-1 | No-Go | Yes, with caveat — Owner may accept the architecture/ working source as the TD basis |
"Đ0-G from a working source; Constitution ref broken; STAMP/GATE least-precedented; recovery still owed (S6)" | OOB recovery or Owner acceptance |
| GATE-4 channel selected + liveness proven | G-4 / PO-2 | No-Go | No (selection) — TD's invocation mechanics cannot be designed channel-undecided; liveness proof may follow | (selection is not waivable; the contract stays channel-independent regardless) | Owner decision (Deliverables 4/5/6) |
| GATE-5 S2 producer owner assigned | G-5 / PO-3 | No-Go | No — Điều 32 §2.1/§2.4 require a governed owner for a new/fix DOT producer | (an ungoverned producer is fail-open — not waivable) | Owner decision (Điều 37 → Điều 32) |
| GATE-6 disposable staging surface exists | G-6 / PO-9 | No-Go | No — PO-9 isolation testing requires a workshop that never touches production | (no-staging means no isolated test before a live run — not waivable) | write-gated build (Deliverables 11–13) |
| GATE-7 S7 evidence contract honored + writers scoped | G-7 / F-7 | Partial | Partly — the contract is ready; the writers may be scoped within the TD | "S7 writers are a TD build item; records-not-decides must hold" | R/O contract + write-gated writers (Deliverable 16) |
| GATE-8 S8 rollback unit + Đ39 snapshot + downstream-certify defined; HOLD-2 acknowledged | G-8 / PO-4 | Partial | Partly — the unit is defined; the mechanism + downstream-certify may be designed within the TD, HOLD-2 acknowledged | "rollback mechanism + downstream-certify unwind are TD items; HOLD-2 open" | design + write-gated (Deliverable 17) |
| GATE-9 bad-input matrix committed to runtime tests | G-9 / PO-6 | Partial | No (commitment) — TD must commit to making BAD-1…BAD-15 executed tests once built | (a TD with no fail-closed runtime-verification plan is not acceptable) | write-gated (needs producer; Deliverable 14) |
| GATE-10 B7 holds warn-mode; transient GUC out-of-band | G-10 / PO-7 | Partial | Partly — warn-mode holds; the transient GUC confirmation may stay out-of-band | "no warn→block flip before a producer; transient GUC unread (CAV-5)" | R/O persisted + OOB transient |
| GATE-11 CONS/CELL + Đ0-G recovery confirmed as prerequisites to downstream canonical materialization | G-11 / PO-8 | No-Go | Scoped — B2 itself never canonicalizes, so TD of B2's inspect_* writes may proceed if it does not assume downstream canonical materialization |
"B2 TD must not depend on canonical materialization; CONS/CELL + Đ0-G recovery still gate downstream" | separate Owner-gated workstreams |
The hard floor (no waiver can cross any of these). Independent of any GATE waiver, actual B2 TD must not:
- design the producer to certify (B2-AC-1), canonicalize (B2-AC-2), mint identity (B2-AC-3), or write KG provenance (B2-AC-4);
- design faked
inspect_*=now()or the 2026-03-21 fused INSERT (B2-AC-5/AC-6); - leak the channel into the contract (B2-AC-7) or omit a per-run rollback unit (a TD with no rollback unit is not authorized — fail closed);
- design net-new stamp columns / a parallel SSOT (B2-AC-12);
- proceed with no S2 owner (GATE-5) or no staging workshop (GATE-6) — these are also hard-floor because they make the build ungoverned/untestable;
- treat any engineering PASS as Owner authorization (B2-AC-10); use v0.2-hardening as FIX7 authority (B2-AC-11).
Gate-clearing order (recommendation-only). GATE-2/GATE-7/GATE-10 (read-only / contract halves) clear first via Macro-1; GATE-3/GATE-4/GATE-5 (Owner decisions / OOB) clear via Macro-2; GATE-6 (staging) via Macro-3; GATE-8/GATE-9 design+commitment clear within the TD itself. Actual B2 TD opens only when GATE-3/4/5/6 are Go (or GATE-3 Owner-waived with caveat) and the hard floor is intact.
Aggregate verdict today: NO-GO. Five gates No-Go, five Partial, one Go. Actual B2 TD must not start. No actual TD is written in this packet.
6. Owner-gated future work
| Future work | Gate required | Forbidden now? |
|---|---|---|
| Open actual B2 TD | Owner decision after the entry gate is Go (or GATE-3 waived with caveat) and the hard floor intact | Yes |
| Waive a waivable GATE with the caveat recorded | Owner decision (the waiver is the Owner's; the caveat must be recorded) | Yes (not done here) |
| Clear GATE-3/4/5 (Đ0-G / channel / owner) | OOB recovery / Owner decision (Macro-2) | Yes |
| Build the GATE-6 staging surface | Điều 32 (Macro-3) | Yes |
| Run the GATE-2/7/10 read-only re-verification | Owner authorizes a read-only pass (Macro-1) | Yes |
7. What remains unresolved
- The gate is No-Go; actual B2 TD does not open. This packet defines the gate; it does not clear it.
- GATE-4 (channel) and GATE-5 (owner) are not waivable — TD cannot be designed channel-undecided or ungoverned.
- GATE-3 (Đ0-G) is waivable only with the caveat recorded — designing against the working source is allowed only if the Owner accepts it explicitly and the STAMP/GATE least-precedented flag is recorded.
- The hard floor is non-negotiable — the B2 anti-coupling invariants and fail-closed defaults survive any GATE waiver.
- Blockers — all OPEN, none resolved: CONS-002, CONS-003, CELL-003/004/007, HOLD-1, HOLD-2, RISK-BYPASS, GOV-016/017, GOV-REUSE-001, Điều 39 runtime-EMPTY, Điều 35 production-readiness FAIL.
- FUTURE_TECHNICAL_DESIGN_REQUIRED (NOT written here): the TD itself; every build mechanic.
8. Ready for GPT/Codex review
Yes — as a design-only TD entry gate, not a TD.
Core rule, kept above all detail: actual B2 TD opens only when the entry gate is Go (GATE-3/4/5/6 closed, or GATE-3 Owner-waived with caveat) and the hard floor (no certify/canonical/identity/KG; no faked/fused stamps; no channel-in-contract; a rollback unit; a governed owner; a staging workshop) is intact. The gate is No-Go today; no actual TD is written; no TD is opened.
Default disposition: HOLD. Engineering PASS = a complete entry gate on paper; readiness is not met (aggregate No-Go), and a PASS is not an Owner authorization to start TD. No PASS authorizes writes. All blockers remain OPEN.