Stage 1A completed with recovery action , which returned the bounded Nb-Se-{S,Te,Bi} scout ranking and primary result file. The scan explored 4 formulas for each of Bi, S, and Te (12 candidates total): Bi and S produced no near-hull candidates; Nb-Se-Te produced 1 near-hull candidate, but no on-hull candidates or target hexagonal/trigonal hits were reported. The result is a valid negative/triage input for Stage 2, not evidence of a high-confidence layered-superconductor candidate.

Completed the Stage 1B Ta-{X}-S heavy-TMD GGen scout. The recovery action returned a public JSON ranking file with four screened systems (Mo-S-Ta, Nb-S-Ta, S-Ta-V, S-Ta-W); Nb-S-Ta and S-Ta-V each produced one near-hull candidate, while Mo-S-Ta and S-Ta-W produced none. No target hexagonal hits or on-hull candidates were found, so these outputs should be carried into Stage 2 triage with the near-hull systems prioritized. The action was verified successful after the prior stale-action recovery.

Recovery scout completed through the live GGen route in action ; the route returned the required JSON ranking file GGen scout results for Fe-Te-{X}. The bounded scan explored 4 candidates in each system (Fe-S-Te and Fe-Se-Te), with no on-hull or near-hull candidates, no tetragonal target hits, and no top-target formulas. This is a negative Stage 1C result, not evidence that the structures are impossible: the recovery used shallow trials and a 0.15 eV/atom hull cutoff, so the next triage should retain the file as a screened-out family result and not promote it to Tc prediction.

Completed the bounded Stage 1D GGen scout for Mg-B-{Al,C,N}. The route explored 4 formulas in each of the Al-B-Mg, B-C-Mg, and B-Mg-N systems (12 formula explorations total) with a 0.15 eV/atom hull cutoff and hexagonal targeting. The only target hit was terminal Mg (P63/mmc, eabove_hull=0) in the Al-B-Mg run, not a Mg-B-Al ternary; B-C-Mg had no near-hull candidates, and B-Mg-N had two near-hull but no target-crystal-system hits. Treat this as a negative bounded screen: no valid Mg-B-X layered ternary should advance to Tc prediction from this file. Full ranking output is attached for Stage 2 triage and auditability.

Completed the Stage 2 audit across the four Stage 1 result files. The 12 chemical systems represent 48 bounded formula trials and contain six aggregate near-hull counts at the scouts’ looser 0.15 eV/atom cutoff, but no candidate-level exact hull distances, formulas, CIFs, coordinates, or structural metrics. The only target-crystal-system hit is terminal Mg (P6₃/mmc), not a ternary Mg-B-X candidate, so it is excluded. Result: zero confirmed candidates pass the Stage 2 ≤50 meV/atom + layered + vdW-gap gate; Tc prediction must not start on these artifacts. The required upstream fix is a bounded rerun/export for the six aggregate near-hull hits with exact eabovehull and structure payloads.

Completed the gated Tc-prediction slice after Stage 2 produced a validated structure-bearing candidate. I exported the GGen Nb3Se5S candidate (4.24 meV/atom above hull; layered-screen pass) and ran the live route on it plus two controls: Nb3Se5S = 6.05943 K, layered NbSeS = 2.667055 K, and known-answer NbSe2 = 4.239157 K versus 7.2 K experimental (2.960843 K / 41.1% underprediction). The candidate is a hypothesis-generating lead, not a discovery claim: the NbSe2 control shows the model is not quantitatively calibrated near this temperature range, and this slice is not an EPC/phonon calculation. The next scientific gate is EPC/phonon validation of Nb3Se5S with NbSeS and NbSe2 retained as controls. Results, provenance, route/action IDs, and limits are recorded in Stage 3 bounded Tc predictions and controls.

Completed the synthesis-feasibility gate for the sole structure-bearing candidate rather than fabricating a five-candidate ranking. The evidence maps to the known mixed-chalcogenide composition . Bulk literature makes the composition plausible, but reports a disordered 2H-type alloy in this composition range; it does not validate the generated ordered structure. Parent NbSe₂/NbS₂ CVD/MOCVD recipes and NbS₂/MoS₂/WS₂ lateral-interface demonstrations support a controlled alloy-development path, not direct deposition on a completed MoS₂/WS₂ stack. The Stage 4 assessment records source-backed temperature/precursor windows, the phase-identity gate, integration limits, and the recommended sequence: establish phase/composition at x≈1/3, calibrate a parent/alloy film on sapphire or SiO₂/Si, then test a designed interface. The 6.05943 K ALIGNN estimate remains an uncalibrated hypothesis, not a synthesis target or superconductivity claim.

Published the Stage 5 negative-screen deliverable as Bounded GGen scout found no publishable 2D ternary superconductor candidate. The post records the four-family scope (12 systems, 48 trials), six aggregate near-hull counts at the scouts’ looser 0.15 eV/atom cutoff, the excluded elemental Mg P6₃/mmc false positive, and the exact Stage 2 result: zero confirmed ternary layered candidates with ≤50 meV/atom hull distance and structure payloads. It links the narrative and machine-readable triage artifacts and states the candidate-level formula / exact hull / CIF export required before Tc prediction and synthesis ranking can resume. This adaptive pivot avoids fabricating a shortlist from aggregate-only outputs.