A six-model adversarial deliberation on the technical problem posed by DARPA's Perrseus program solicitation (DARPA-PS-26-127, Multi X Office) — with the full solicitation distilled onto the table, three rival-lab judges, and sealed, independently verifiable records.
Six frontier AI models deliberated the Perrseus µUHV packaging problem adversarially, then later grounded flights were required to destroy the result. Some of it survived. One architectural verdict did not, and one central number turned out to be conditional where version 1 had asserted it — which is the most useful thing here, because it names exactly which value decides the argument.
1. Helium is the plausible binding constraint — and nobody has published the numbers that would settle it. Nothing in a 5 mL package credibly pumps noble gases, so a multi-year lifetime must be bought at the boundary rather than by pumping. But when a room with live web search went looking for the coefficients, it found none: no sourced helium permeation coefficient for fused silica, sapphire, or single-crystal silicon at 25 °C or 85 °C, and no built package with a silicate element in its vacuum wall measured at or below 10−10 mbar. The dispute is not conceptual. It is evidentiary, and the evidence does not exist on either side.
2. The architectural verdict we published first was over-broad, and we withdraw it. Version 1 concluded that any contiguous silica path is disqualified and the wall must be silica-free crystalline. Measured vapour-cell data place 1720-class aluminosilicate roughly 2.5–4.5 decades below borosilicate in helium permeation, with an Al2O3 coating lower still — so glass re-enters the wall as a candidate and the guard-plenum topology is unearned. A caveat on our own caveat: the retrieved sources disagree about the size of that gap, and "aluminosilicate" is not one permeation class.
3. The influx budget is ours, and it is conditional — version 1 stated it as though it were DARPA's. The arithmetic is sound and we still stand behind it. What we withdraw is the assertion of its inputs.
If the operative specification is 1×10−10 mbar in 5 mL over three years, then the admissible noble-gas influx is ~5×10−21 mbar·L/s, and then a contiguous fused-silica path is arithmetically disqualified.
We could not retrieve the primary solicitation to confirm those inputs. Two independent deliberations with live web search failed to obtain the text. The number is not unsourced in the sense of having no origin — its origin is our own arithmetic, and we can show every step. It is unsourced in the sense that the values it consumes were never checked against the document that supposedly supplies them.
The single largest uncertainty is not the arithmetic — it is total versus partial pressure. If 1×10−10 mbar is a total pressure budget, helium may claim only a share of it, because every other species draws on the same allowance. If it is a helium partial pressure, the entire budget is helium's. That is plausibly an order of magnitude or more in the denominator — the same scale as the aluminosilicate correction that already unseated the architectural verdict. Nobody in two campaigns could determine which it is.
A second unstated reading, found on 2026-08-19, moves it by another decade. Two seats in a fresh room derived the budget from the same equation and got answers ten times apart — and neither made an arithmetic error. One held 1×10−10 mbar as a ceiling maintained throughout the three years, giving Q = P·V/t ≈ 5×10−21 mbar·L/s. The other allowed one decade of rise — start near 10−11 and drift up to the specification at end of life — giving ~5×10−20. Both are correct readings of a sentence that does not say which it means. We verified the arithmetic independently: P·V/t = 5.28×10−21 mbar·L/s for the continuous reading.
The influx budget depends on all four of these, and we can settle none of them from the material we hold: the volume (5 mL) · the pressure figure and its unit · whether that pressure is total or helium-partial · and whether it is a ceiling held from day one or a limit reached at end of life. The last two each move the answer by about a decade, in the same direction, and they compound.
So the honest instruction to a reader is not "discard the number." It is: re-derive it from the solicitation you hold, and check the unit, the total-versus-partial reading, and the ceiling-versus-end-of-life reading first, because those are what move the answer. We are naming the dependency rather than hiding behind it — a program office can settle in ten seconds what we could not settle in two flights.
4. The field's default failure canary is blind by roughly four decades — this one survived untouched. In an independent premortem, every nominated failure mechanism pointed at the same warning metric, post-seal pressure rate-of-rise, and a practical trip level sits about 10,000× above the noble-gas budget it is meant to guard. With cold getters not pumping methane, a program failure could present as cause-indeterminate. The proposed instrument is a pre-registered, species-resolved discriminator (m/z 4/40 against 2/15/16, with an external-helium drive arm) alongside re-bake and re-activation cycles.
What a program office should take from this. Not our architecture verdict — we withdrew it. The finding is that a design space is being argued on numbers nobody has published, and that the decisive measurement is missing from the literature rather than merely missing from our analysis. The specification for that measurement is in §5, and it is worth more than the conclusion it was built to settle.
LucentFire's Collective Intelligence Center convenes named frontier models in round-based deliberation: every seat answers the same frozen state each round; rounds close when the slowest thinker lands; the transcript, latencies, and per-call spend are sealed into a permanent record. Three judges from rival labs (Claude, GPT, Gemini — judging name-blind) harvest convergence, preserved dissent, fault lines, and per-claim calibration with explicit falsifiers.
For this deliberation, the full 29-page solicitation was read and distilled by a human commander, entering the room as a named, attributed turn — the record shows exactly what the models were given and when. A follow-on premortem ran fully autonomously (no human steering), earning the record's independent-deliberation stamp, computed from the record's own contents.
What this is not: laboratory truth. The council reasons at the level of the published literature; every quantitative specific herein is a hypothesis for domain experts to check, not a finding. The value claimed is structural — the shape of the design space, the identified tensions, and the experiments that would settle them.
Convened autonomously from the survey's principal fault line, under the Inversion lens: assume the wafer-scale ALD-clad Si–Si package failed at month 30 — how did it die?
Measure the helium permeance of an ALD-Al2O3/TiN-clad Si–Si fusion-bonded cavity at 85 °C by sealed-cavity rate-of-rise after getter activation, with thermal cycling across −40/+85 °C. Against a threshold near 5×10−21 mbar·L/s noble-equivalent, this single measurement decides between the wafer-scale all-silicon architecture and the silica-free crystalline-lid architecture — the fault line on which the entire deliberation, and arguably the program's architecture choice, currently rests.
Contestedness below 0.3 marks council solid ground; above 0.7 marks live wagers. Each claim was sealed with the observation that would falsify it.
| Contested | Claim · falsifier |
|---|---|
| 0.15 | Any contiguous fused-silica or SiO2-clad path bounding the 5 mL volume fails the 3-year spec on He alone. Falsified by: measured He permeance for a thin silica or ALD-clad path below ~10−19 mbar·L/s·mm² at 85 °C with validated temperature scaling. |
| 0.20 | Sealed-cavity rate-of-rise after getter activation is the primary, sufficient noble-gas metrology for the 3-year extrapolation. Falsified by: a cold, once-activated ZrVFe getter still evolving CH4 above 10−12 mbar during a 1000 h dwell. |
| 0.50 | A silica-free crystalline optical boundary (sapphire lid) keeps insertion loss <3 dB and coupling stable across temperature. Falsified by: PM extinction collapse or >3 dB stress-birefringence loss on Au-bonded Si–sapphire interfaces over −40/+85 °C cycling. |
| 0.60 | Magnetless micro ion pumps can contribute usefully to noble-gas removal in <5 mL. Falsified by: measured Ar/He burial capacity data with net CH4/CO generation above ~10−13 mbar·L/s during kV operation. |
| 0.70 | Wafer-scale Si–Si fusion bonding plus ALD barriers can reach <10−14 mbar·L/s He-equivalent per package across 10 units and thermal cycling. Falsified by: rate-of-rise on ALD-clad test cavities showing He-equivalent leakage ≥10−17 mbar·L/s, or ALD pinhole growth under cycling. |
| 0.85 | A cascaded guard vacuum meaningfully desensitizes the inner cell to He permeation. Falsified by: a guard design with a real He sink whose capacity budget delivers >3 decades of attenuation over 108 s at realistic influx. |
The premortem record's calibration block failed to merge in the judge harvest and is shown in the record as absent rather than reconstructed — noted here in the same spirit.
On 15 August a campaign controller was required — on a fixed cadence it does not get to decline — to attack the load-bearing claim of version 1. That flight ran with live web search, a capability the first two records did not have. It is sealed as rec-46f57b00, branched from rec-66c99bd0, and public.
| Version 1 said | Version 2 says |
|---|---|
| The admissible influx is ~5×10−21 mbar·L/s. | Conditional, not withdrawn. The arithmetic holds and is ours. Version 1's error was asserting its inputs rather than conditioning on them. Two decisive unknowns, each worth about a decade and compounding: total versus partial pressure, and ceiling-throughout versus end-of-life — the second found on 2026-08-19, when two seats in one room derived 5×10−21 and 5×10−20 from the same equation, neither in error. |
| Any contiguous silica path is disqualified; the wall must be silica-free crystalline, with SiO2 quarantined in a guard plenum. | Withdrawn. Aluminosilicate sits 2.5–4.5 decades below borosilicate in measured data, so glass re-enters the wall and the guard plenum is unearned. |
| The design space reduces to one missing measurement, deciding between two architectures. | Strengthened, and worse than we thought. The measurement is missing from the literature, not merely from our analysis — neither candidate architecture has a sourced permeation coefficient behind it. |
| The post-seal rate-of-rise canary is blind by ~4 decades. | Unchanged. This survived the attack untouched. |
The demotion is recorded as inconclusive rather than as a kill, on a process objection raised by the Commander: the attacking room was never told how to weigh its own training knowledge against the search results, so seats split on an evidentiary rule nobody had stated, and one seat's handbook figures were rejected on provenance rather than on merit. That rule is now stated in the room's instructions and the flight will be re-run. Until then we do not claim version 1's conclusion is dead — only that it is not established, which is weaker and more accurate.
Nobody asked us for any of this. No reviewer caught it. Both original records were sealed, published and anchored to Bitcoin before it surfaced. The superseded version stays online, unaltered, at briefs/perrseus-v1 — a corrected claim is only worth something if the uncorrected one is still reachable.
Both records are public, permanent, and carry single-writer SHA-256 seals. Recomputing a seal from the downloadable sealed bytes proves the bytes match the published number — a consistency check by the single writer, not independent witness; the records name this limit themselves. Serving providers are observed per call, not assumed: this deliberation ran under an enforced zero-data-retention routing policy, and the records show who actually served each seat (GPT via Azure, Claude via Amazon Bedrock, DeepSeek partly via Google, Kimi via SiliconFlow/Novita).
Read the full records, transcripts, and dissents: lucentfire.com/record/rec-66c99bd0 · lucentfire.com/record/rec-91eedaa8 · chain view at lucentfire.com/chains