Check what's asserted as real against reality — in both directions — before it ships.

Goal

The author's "plausible / absurd / novel" is the least reliable line in any artifact. Human priors fail

both ways

— they exclude the real (desert frogs exist) and normalize the impossible (weightless crates).

factchk

scans claims presented as reality-grounded, verifies each against external sources in both directions, and fixes or flags. Its scope is a claim about

the world

— whether what's asserted as real is real — not the soundness of a validation or the survival of a whole plan.

Workflow

Scan for

reality-grounded assertions

— anything leaning on "this is plausible / realistic / absurd / novel / impossible because X," including the claim you are

about to write

, not only those already on the page.

Verify each against

external sources

(web search, open references) in

both directions

could the "absurd" be real? could the "obvious" or "novel" be false or long-established? If you cannot reach a source,

flag — never assert from intuition

.

Fix or flag:

a mechanically-clear error (a wrong date, a misattributed source, a falsified number) → correct it with a cited source; a judgment call (a contested or interpretive claim) → surface it, don't silently rewrite.

Report each claim, its verdict, the source, and — for a failed claim — which direction it failed.

Rules

Target claims asserted

as reality-grounded

, never deliberate fiction ("in our world, boxes float" is a declared choice). When it is unclear whether a claim is an in-world choice or a real-world assertion,

flag, don't fix

— the hardest call in the skill.

Flagging only the unrealistic catches half the errors.

The trigger is

metacognition, not knowledge

you can't know every domain, so the moment you are about to assert a checkable fact from a feeling, verify it instead of trusting the feeling. A pass that finds nothing changes nothing. Show more Installs 1.0K Repository lilmgenius/paperthin GitHub Stars 1.1K First Seen Jun 28, 2026 Security Audits Gen Agent Trust Hub Pass Socket Pass Snyk Warn