kaval 0.1.2

Python SDK for the kaval currentness API (belief in → typed freshness gap out).

kaval (Python SDK)

The freshness gate for AI. Give kaval a belief your system already holds — a cached fact, a CRM field, an agent memory — and it checks the live world and returns a typed freshness gap: current / stale / contradicted / unsupported / conflicting / insufficient.

Install

pip install kaval

Gate a belief before you act on it

from kaval import KavalClient

# base_url defaults to the hosted cloud (https://api.usekaval.com).
with KavalClient(api_key="kv_live_...") as client:
    decision = client.verify("Acme's CEO is Jane Doe")
    if not decision["act"]:
        ...  # stale / contradicted — re-fetch before relying on it

verify() returns the verdict plus act — True only when the belief is current and confident (≥ 0.7 by default; override with min_confidence).

Pick a speed/depth tier

verify(belief, mode=...) selects a tier (default auto): instant (cache / graph-prior only, no fetch or LLM), fast (cheap model, origin-only), auto (balanced), or deep (strongest model + a cited explanation). The returned dict echoes tier, and on the deep tier adds explanation:

gap = client.verify("Acme's CEO is Jane Doe", mode="deep")
gap["tier"]                       # "deep"
gap["explanation"]["content"]     # markdown rationale with [n] citations (deep only)
gap["explanation"]["citations"]   # [{"url": ..., "title"?: ...}] — only from gathered evidence
gap["explanation"]["confidence"]  # "high" | "medium" | "low"

Sweep a store for drift

report = client.scan_store(["Acme is on the Enterprise plan", "Jane Doe is VP Eng at Acme"])
for r in report["riskiest"]:
    print(r["belief"], "→", r["status"])

# …or get pushed the newly-stale ones (carry `state` across runs so a still-stale belief
# isn't re-delivered every sweep):
client.monitor(beliefs, webhook="https://your-app.com/hooks/stale")

Custom base URL

Override the API base URL (e.g. a staging environment or a local proxy):

client = KavalClient(base_url="https://staging.api.usekaval.com", api_key="...")

API

verify · check · extract_and_check · scan_store · monitor · report_outcome · kaval · kaval_batch · health. Construct with KavalClient(base_url=?, api_key=?) — base_url defaults to https://api.usekaval.com. The Node/TypeScript client mirrors this surface: npm install @usekaval/kaval.

Test

pip install -e ".[dev]"            # from sdks/python (development)
pytest                             # hermetic contract tests (httpx MockTransport)
KAVAL_BASE_URL=https://api.usekaval.com KAVAL_API_KEY=kv_live_... pytest   # also runs the live test