[GoGoKo699]

The four-address field route now has a six-T, three-band decoder, replacing the retained 63-T, 36-band full decoder. Its complete direct indicator uses 72 T gates, at most 28 bands and 350 total gates with three returned dirty wires; the earlier field-route word used 300 T gates and at most 160 bands. This is a finite construction, not an optimality claim or a change to R96.

The change constructs a genuinely non-Clifford flat bank, its complete grading, a 12-T six-band physical copy, and a Clifford completion to a full literal field intertwiner (65 forward / 63 inverse gates). The shorter bank decoder supplies the cheaper indicator. All identities retain literal phases, arbitrary principal/dirty/reference inputs, actual inverses and work return.

The accompanying bounds have separate scopes: this finite seed has one-band copy error at least 1/(2 sqrt(2)); arbitrary Clifford embeddings of product THT-dagger seeds have a width-independent 3/32 floor when a selected output dual is Clifford; unique largest Pauli coefficients give a coefficient-gap floor. A full intertwiner below error one also needs axis pairing rank at least m−2 on the query-fixed Pauli space. That last condition is not imposed on the weaker one-probe decoder.

Internal proof and circuit audits are complete. Fifteen new exact tests cover the native seed/decoder/copy, all 512 direct-indicator input columns in both directions, full intertwinement, grading, literal signed-support constraints, fingerprints and the scoped rank filter. Earlier distinct proofs, anchors and native pilots are retained.

Validation on the reviewed final tree:

• Local: all ten WORKSPACE gate commands passed on Python 3.12.14 / NumPy 2.3.5, with OPENBLAS_NUM_THREADS=OMP_NUM_THREADS=1. The full suite passed 2,035 tests in 1,827.552s; the complete gate took 1,861.226s. All four fault-tolerant fixture suites passed.
• Formatting preflight: all 21 presentation regression tests passed. Focused rendering covered nine changed Markdown pages, the asset guide and five SVGs: 466 distinct expressions, 581 protected occurrences, zero errors/failures. Five section views were manually reviewed; final page renders are byte-identical to those reviewed views.
• PR validation: Python 3.11.17 / NumPy 2.4.6 passed 2,035 tests in 2,340.552s; Python 3.13.17 / NumPy 2.5.4 passed 2,035 tests in 1,822.395s. Both complete logs confirm all 15 new tests, four fault-tolerant suites and all 16 job steps successful.
• Push validation: the same two Python/NumPy versions passed 2,035 tests in 2,800.633s and 1,316.834s respectively. All final-head analytic jobs passed.
• Full presentation CI: all nine steps passed. Artifact presentation-previews, ID 12817869160, is 344,565,702 bytes and bound to the reviewed head; SHA-256 f1d3de4ffbc5c9b733b02fea423f8e49ec9944b4f872d1788461fc54146743fe.
• All five checks on the final head passed. The synthetic merge d715072abfe0e3e3ba7baf69068f9a54c9237eda has the reviewed tree and parents matching the unchanged base plus final head.

Exact review record:

• Head: c07ab3a1d7d0ea6892403689eadff476f45b511c.
• Tree: c2a71c8c5132fcff61624e22ed4baf7ace4bc546.
• Base: 68f0ce342bf105e4b3aa3b1a7c5d76c3f579998b.
• Local receipt SHA-256: c843d987963bc4be1df46832a8b681137b13ec493e5fac17e30604ba178f6f32.
• Complete local suite log SHA-256: a10a5dd7dc5138f189dabbcc11232184f57941f9461bc8618a85811c543d91f8.
• Focused presentation report SHA-256: 1bcb5a69a9e12f80fde7bab4b1a97bcceb477a4c84f1f5e83044fd5ccf93498f.
• PR Python 3.11 complete log SHA-256: 98bdd7ee113849a7b8722cfdb84093346cb5f66d3609d19eacfdee80710e81cd.
• PR Python 3.13 complete log SHA-256: 81334aa43f376a77477902c558636d1dc2350c4123a8d39287b9d84bb5d54e92.
• Push Python 3.11 complete log SHA-256: 47b007a86c0ca28e2dceec60a6088278df396d0905e4f14b513ed03687045ca8.
• Consolidated CI qualification receipt SHA-256: b544cf15eb5a7ab7f04f4c94fcd596afcdd463c7fda95e8cb4e5ad6fcb7813db.

The next construction is a uniform decoder within polynomial discovery budgets and sublogarithmic T depth, allowing the complete lookup probe's commutant freedom. No manuscript or general-frontier promotion is made.