This manuscript presents a complete-proof architecture for the Twin Prime Conjecture built as a strict theorem spine with a fixed protocol layer, a local inequality engine, an exactness/extraction engine, a global replication engine, and four fully integrated package appendices closing the remaining vertical seams. The core design principle is to replace diffuse parity-language with a rigid two-class reserve corridor. After the sign-consistent reserve reformulation and hard-tail elimination, the decisive reserve geometry is reduced to the two exact classes Ω(n+2)=2 and Ω(n+2)=3. The central reserve objects are fixed as R_FI^Res := R_FI^(2) + R_FI^(3)C_I := R_FI^(2) − R_FI^(3) and the reserve membrane observable becomes δ̂_FI^(μ,Res)(w) = C_I on the filtered squarefree support. Thus the local burden is no longer a vague Möbius-sign problem; it becomes a quantitatively sharp two-class dominance problem. The manuscript is organized around a load-bearing theorem cascade L1 → L2 → L3 → E1 → E2 → E3 → G1 → G2 → G3 → G4 → T where: L1 provides the shell majorization estimate. L2 proves the exact two-class reserve reduction after hard-tail elimination. L3 converts the two-class seal into strict local success. E1 proves proxy completeness. E2 proves positivity of the surviving exact-twin mass once the normalized bad mass is strictly below total mass. E3 extracts an exact twin-prime pair from local positivity. G1–G4 globalize the local result across infinitely many pairwise disjoint admissible intervals. The local inequality engine begins from the normalized shell bound λ_F(w) ≤ C_F^left + R_F^Res and sharpens it through the core-corrected export λ_F(w) ≤ C_F^left + R_F^Res − C_I which is the decisive local input consumed by the local-success theorem. Once one has a threshold-safe reserve-share inequality R_F^(2) ≥ σ R_F^Resσ > (1 + c_0) / 2 with c_0 the interval-independent thin left-core ceiling, the exact two-class geometry implies C_I = R_F^(2) − R_F^(3) ≥ (2σ − 1) R_F^Res and therefore, writing γ_23 := 2σ − 1, γ_23 > c_0 so that the corrected shell bound yields λ_F(w) 0 or ρ′ > 0. This package stabilizes the denominator mechanics of the share theorem and ensures that the ratio language is non-vacuous on every reconstructed laboratory. In the final proof architecture, D is not the owner of threshold-safe share sharpening; it owns denominator nondegeneracy only. Package Q: uniform share extraction Package Q closes the modality seam. Its purpose is to upgrade local/labwise share information into one interval-independent universal share constant. The decisive output is ∃ σ > 0 ∀ I : R_FI^(2) ≥ σ R_FI^Res The proof is organized as an anti-collapse route: if the class-2 share were allowed to decay toward zero along a sequence of admissible laboratories, then the surviving surrogate signal would have to be completely paid by an overshoot ledger. Q splits this overshoot into light and heavy residual parts, proves a corridor-stable ceiling for the light part, and then rules out full patch-failure. This yields inf_I ( R_FI^(2) / R_FI^Res ) > 0 and therefore a genuine universal share constant. Package O: threshold-safe share sharpening Package O is the sole owner of the final threshold-safe reserve-share export in the load-bearing spine. It imports X, D, and Q, and closes the donor-gap sharpening through a strict donor-buffer inequality. The goal is not merely to prove that the error is small, but that it is too small to reverse the two-class order relative to the required threshold. The package works with the donor-buffer quantity G_I := R_FI^(2) − ((1 + c_0) / 2) · R_FI^Res and reduces everything to a strict surplus-over-loss inequality of the form κ_meso* > β_zone ρ* + θ_rem which means that the useful mesoscopic class-2 donor surplus strictly dominates the top-zone and remainder losses. This produces a positive correlated buffer G_I ≥ η_corr · R_FI^Resη_corr > 0 and hence the sharpened threshold-safe share line R_FI^(2) ≥ ((1 + c_0) / 2 + η_corr) · R_FI^Res equivalently R_FI^(2) ≥ σ R_FI^Resσ > (1 + c_0) / 2 This is the decisive quantitative closure consumed by the local engine. In parallel with the vertical X–D–Q–O chain, the manuscript unfolds the horizontal T1–T7 repayment cascade in the main body. T1–T7 repayment cascade The repayment tail is organized as T1 ⊣ (T2 → T3 → T4 → T5) → (T6 → T7) Here T1 is not a numerical theorem but a strict firewall/admission theorem. It exports only a lawful reserve-blind shell input object and forbids semantic smuggling of later reserve-core meanings. The decisive repayment engine is T2–T5: T2 identifies the exact two-class shell core. T3 proves the core-plus-error decomposition. T4 bundles and sterilizes the remainder sourcewise. T5 proves dominant two-class core control strong enough to export the corrected shell bound and the local seal. The endpoint tail T6–T7 then transports the already certified dominant two-class core to the fixed shift h = 2 and excludes exceptional-shift failure there. The local algebraic heart of the manuscript is the one-payment dominant-core theorem. In its cleanest form, it states that for every admissible interval one has S_I = C_I + E_I|E_I| ≤ c* · R_FI^ResS_I ≥ Λ · R_FI^ResΛ − c* > c_0 and therefore C_I ≥ (Λ − c*) · R_FI^Res which yields R_FI^(2) ≥ σ R_FI^Resσ = (1 + Λ − c*) / 2 > (1 + c_0) / 2 This is the exact local seal. It is this algebraic heart—not the contract interface theorem—that drives the proof to completion. The document is therefore not merely a narrative of heuristic packages, but a theorem machine with: a fixed object registry, a protocol lock, a no-hidden-import discipline, consumed-exports ledgers, a machine-verification summary, a unique local algebraic heart, and a fully internalized vertical proof cascade. The final global implication may be compressed into the following theorem pipeline: shell majorization + exact two-class reserve reduction core-corrected shell bound threshold-safe reserve-share seal⇒ λ_FI(w_I) < 1⇒ positive surviving exact-twin mass in F_I⇒ exact twin-prime pair in each admissible interval⇒ infinitely many distinct twin-prime pairs In this sense, the manuscript claims to transform the twin-prime problem into a fully discharged local-vs-global corridor: exact two-class reserve geometry dominant-core local seal interval replication fixed-shift endpoint transfer= infinitude of twin primes.