Apppublic

delgesem/constitutional-climate-fact-checker

sourceHugging Faceupdated 15d agoView on Hugging Face

0likes

App README

Constitutional Climate Fact-Checker

An AI fact-checking system for climate claims, governed by a constitution of 27 codified principles encoding professional fact-checking norms. Built for professional fact-checkers to evaluate: every verdict is accompanied by the full tool trace, the evidence gathered, and a calibrated confidence.

Required configuration

Set these under Settings → Variables and secrets before the Space will run.

Secrets

Name	Purpose
`ANTHROPIC_API_KEY`	Required. The model that runs the fact-check.
`HF_TOKEN`	Required. Read access to the two private model repos below. Without it both tools fall back to base models.
`SERPER_API_KEY`	Optional. Without it, `web_search` falls back to DuckDuckGo, which is not the backend used for the reported evaluation.
`APP_PASSWORD`	Optional. When set, gates the app behind a shared password. Leave unset for a private Space; set it if the Space is public.

Variables

Name	Value
`CLIMATE_NLI_MODEL_PATH`	`delgesem/climatecheck-nli-finetuned`
`CLIMATE_MYTH_EMBEDDER`	`delgesem/climate-bge-finetuned`

If either variable is unset the corresponding tool silently substitutes a base model, which changes results. The sidebar reports which model each tool is actually running — check it after the first boot rather than assuming.

Pipeline fidelity

Three of the four local tools run exactly the models used in the reported evaluation:

Tool	This Space	Evaluated pipeline
`myth_detect`	fine-tuned BGE + FAISS index	same
`rag_search`	`all-mpnet-base-v2` + curated index	same
`nli_evaluate`	ClimateCheck fine-tuned DeBERTa	same
`claim_split`	rule-based conjunction splitting	fine-tuned Qwen LoRA (needs a GPU)

claim_split is the exception: the fine-tuned Qwen splitter requires CUDA, which a CPU Space does not have, so it falls back to rule-based decomposition. The sidebar shows a warning while this is active. Claim decomposition will differ from the reported results; the other three tools will not.

Curated evidence index

rag_search retrieves from Global Tipping Points 2025, WMO State of the Global Climate 2024, WMO COP30 update 2025, and Copernicus 2025.