Sighgreat.  "In my world there are those who hold all such secrets in their Keeping, and even I would show them deference for the many oaths they've sworn.  I don't suppose there's any analogous such institution here, to send one of their own who has already sworn neutrality in all conflicts between factions and corporations?"

"I think a world has to build many other strengths, first, before a mortal could take those oaths and be expected to mean them and have a reliability at keeping them that approached what would be required. Devils would call on an axiomite, but I know of none of those on this plane and it seems plausible they could not survive in it. They are found in Lawful Outer Planes."

(Axis. They're found in Axis. Perhaps even Contessa Lrilatha is unsure whether to make it clear to Keltham that everything about Keltham is found in Axis.)

(Someday she's going to die and if she is EXTREMELY brilliant and EXTREMELY perfect then someday after that she will get to be like that and it'll be worth all the agony in between.)

"The lower Keepers have broken their oaths in recorded memory, but not the highest Keepers, in my world.  But if they don't exist here, then that's the fact.  Are there leaders of Law-aspiring factions in enough direct contact with Law-abiding gods that they, at least, could be entrusted with potentially dangerous information?"  He's suspicious of the notion that he managed to drop in on the only faction that could safely handle incredibly valuable information, but not infinitely so; whatever force dropped him here could have made a choice of destinations.

"The pharaoh of Osirion is in very close contact with Abadar and very likely to be truthworthy with this." And they think He knows of it already. "The leadership of Nidal is likewise in close contact with their Lawful god but their Lawful god is Zon Kuthon, the one who had his values inverted by the void. I recommend handling Nidal and Zon Kuthon's church differently than you'd handle all the other churches and factions. The imperial line of Minkai claims descent from Shizuru, Lawful Good goddess of the sun, and I expect - though less confidently - they could be trusted as well." 

(Shizuru stopped taking actions in the Material Plane several thousand years ago. Minkai is isolationist and eight thousand miles away.)

"From my own perspective I desire to prepare against the contigency that Cheliax finds it of utility to monopolize knowledge that I have no utility in Cheliax monopolizing.  Suppose then a contract which, if not renegotiated by mutual consent within a year, at the end of that year sends a copy of all recorded underlying-knowledge I divulge, to the leader of Minkai and the leader of Osirion; Cheliax may not, without my own consent, broadcast that knowledge in any form which fails to credit it to Keltham brought of dath ilan.  Should it begin to spread in any case, this putative contract requires you to inform me of this fact as it becomes apparent and to give appropriate credit then, unless otherwise renegotiated.  And though this was also said informally before I came here, Cheliax nor Asmodeus nor their agents may not hinder me from departing at any time, should I choose to do so, nor from earning such money as may be required to pay my passage, nor from trading for such passage at its customary fee, nor by any magic or other means take my knowledge from me or prevent me from retelling it.  With the intent being that I am not hindered from spreading the information myself, should it seem wise, and should Cheliax refuse to do so."

"What would you propose that Cheliax do, should we learn that you intend to imperil our world?"

...fair, if he tries to take their perspective on the alien.  "Shizuru, Abadar, and Asmodeus or their representatives may by their unanimous agreement annul this contract?  Or, nothing in the contract shall be construed to prevent me from being stopped or imprisoned as authorized by majority vote of the Lawful deities of Golarion - which is probably a weird way to put it, but I'm not sure what the usual way is of stopping people out to free Rovagug.  I'd hope there'd be some sort of interfactional treaty on that, which, if so, no agreement merely between Keltham and Cheliax could or should hinder." 

It is a concession on top of what was communicated by Asmodeus, which was just that they had to let him go eventually, and not torture him, or cause him comparably incapacitating kinds of harm. She probably has to make it, though. If they can't hurt him they need him cooperative and he is smart enough to notice if she has a brilliant justification for not giving him even the most reasonable of the things that he wants, and to treat that as information, of which he already has rather too much.

"Cheliax, Asmodeus and our agents may not hinder you from departing at any time, should you choose to do so, nor from earning such money as may be required to pay your passage, nor from trading for such passage at its customary fee, nor by any magic or other means take your knowledge from you or prevent you from retelling it, except insofar as this would contradict normal procedures for protecting the world from destruction, which do exist. The other terms are in broad strokes acceptable to us. Shall we work out the details?"

"Yes, let's.  I apologize for the expense of your time but I need to know a little about what is covered by 'normal procedures for protecting the world from destruction', which, for all I know, authorizes, say, you personally, to imprison any person in Cheliax at any time for any reason."

"On an alert from Asmodeus or a god allied with him that a person poses an immediate threat to Golarion's continued existence or habitability for humans, we stop them. You have my word we would not kill you or take actions against you beyond containing you, even under those circumstances, but we might not release you until we had appropriately addressed the avenue by which you threatened the world."

"Is Asmodeus a kind of entity that simply does not issue such orders falsely or by playing with the definitions of terms?  Anything is a threat to the world on a line of sufficiently low probability."

"If you meant any of the things you said about the Worldwound, the expected lifespan of the world should be longer given your presence in it; if that were true, then arresting you would obviously not qualify as protecting the world from destruction. If you want to oblige Asmodeus to get additional gods to agree with Him we can write that in; gods don't differ on predictions they've had time to think about."

It wouldn't have occurred to Keltham to imagine that Lawful gods could have common knowledge of disagreement before they'd had time to think... no, she must just be talking about convergence of gods' first-order opinions, or their empirically observed convergence times under conditions where they can't share info.

"I think I'm happy with you having the right to stop and contain me but not otherwise kill me or take actions against me, upon Asmodeus alerting that he swears the world is predicted to have a net lower probability of surviving the next century if you don't thus stop me, for reasons irrespective of Asmodeus or his agents having deliberately decided to promote lower survival-probabilities in that conditional."  As near as Keltham can figure, that should only break if Asmodeus swears falsely, in which case this whole treaty is empty paper.  "I'm also happy to hear about more standard agreements and treaties protecting the world, into which you believe this treaty should interface."

"That's satisfactory to us. There's an extension of the Worldwound treaty, with fewer signatories, committing that in the event of an imminent threat to the world of greater magnitude than the Worldwound, signatories will extend the Worldwound treaty's provisions for coordination to that automatically, and cease hostilities against each other; you might want to look it up but I don't think this would need to interface with that. There are other agreements I'll make you aware of if you seem to be on a path to discovering the vulnerability they guard against."

"Please do.  I am not, as I understand it, Good, but I do have business ethics that forbid destroying other people's private property, or the entire planet they live on.  Are there other provisions to be negotiated, or should we start writing up?"

"I'm prepared to start writing up an agreement along the lines we have just outlined. "

"I expect your speed to exceed mine and am happy to have you do so.  May I have your assurance that you will not write with intent to include terms, phrasings, or conditions which would be interpreted by any relevant entities in ways that would surprise me, or have consequences favorable to yourself and unfavorable to myself which you mostly expect me not to notice?"

There are six people on the planet with the Sense Motive skill to notice that this devil feels this is the most egregiously joyless contract condition ever devised, clearly devised by people with no sense of honorable competition.

"That is very reasonable. Of course. You have my assurance that I will not write with intent for any of the contract's conditions or terms to be interpreted in a way that would surprise you, or in a way counter to the agreement that we just devised, or with detrimental consequences to you that I expect you not to notice." 

"All right, let's go."

She plucks a feather off her wing, sharpens it with her teeth, and starts writing. She writes very quickly, apparently just limited by the necessity of pausing every line to blow on the ink so it dries. She has very beautiful handwriting. 

Keltham comes from a world whose fantasy novels developed in such fashion as to not include any tropes under which writing a contract with a devil's ichor would have supernatural effects.  Contracts are shadows of the one irreplaceable Algorithm and breaking them might get powerful supernatural beings angry at you for peeing on the Algorithm, but this would be totally unrelated to the ink in which those contracts were written.  History has been screened off, and the best-guess shared-false-historical-world fiction that developed afterwards, doesn't include the best-guess that people used to use feathers as pens - that's not a trope either.

Keltham is staring at this trying to figure out whether she is an artificial organism designed in such fashion that her anatomy just happens to include better pens than could otherwise be supplied on short notice to a Government negotiation in a secure facility.

She regrets the necessity of not answering this question for him because she's not acknowledged to be reading his mind. 

The contract is three pages, when she's finished it. She hands it to him. 

Keltham reads it over in a relative hurry, mindful of the expensive time of the Very Serious Alien sitting across from him.  He still takes time to carefully scrutinize three important-looking sections, and randomly samples two innocent-looking sections for scrutiny.  It's not written like a dath ilani contract would be, but that hardly surprises him; the point of a contract is to be written in a standard language for the locale in which it will be interpreted, to have predictable effects on the arbiters who will interpret it.  Dath ilani contract language would not be predictable in this region.

It basically seems to be what they discussed?

"Sorry but just to check:  Was this document indeed completely authored by you just now, and was it thereby covered by the assurance I heard regarding an absence of detrimental terms you expect to surprise me?" Keltham says.  He did notice, having had a few moments to think about it, that if Somebody else stepped in and wrote through her, the given assurance wouldn't hold.