krepis 0.31.1

krepis (Greek κρηπίς — the foundation a structure stands on): general-purpose Python primitives for production data and LLM pipelines on AWS — logging, SSM secrets, Telegram/SNS/Web Push alerts, bounded-backoff HTTP retry, S3 writer locks, the Anthropic payload chokepoint, LLM cost telemetry, the LLM-as-judge transport core, trading-calendar/date helpers, and EC2-spot/SSM resilience.

krepis

krepis (Greek κρηπίς — the foundation course a structure stands on) is a small, typed library of general-purpose Python primitives for building production data and LLM pipelines on AWS.

Install

pip install krepis

What's inside

Module	Purpose
logging	Structured logging + the flow-doctor secret-seeding chokepoint
secrets	SSM-backed secret resolution
alerts	Telegram / SNS alert routing with S3-marker dedup (incl. CLI)
telegram	Telegram transport
webpush	Web Push (VAPID) transport — reaches an installed PWA/site regardless of tab state (webpush extra)
email_sender	SES / SMTP email transport
http_retry	Bounded-backoff HTTP retry with jitter
locks	S3 conditional-PUT writer locks
cost	LLM cost telemetry (token counts × price card → USD)
model_metadata	ModelMetadata value object (per-invocation model + token cost)
anthropic_payload	Anthropic request-payload construction + validation
metrics	Typed metric records
trading_calendar	NYSE trading-day calendar (pure stdlib)
dates	Calendar / trading-day dual-track date helpers
ec2_spot	EC2 spot-instance resilience helpers
ssm_dispatcher	SSM command dispatch
ssm_log_capture	SSM run-command log capture
usage_pacing	Linear-pace short-circuit against a rolling reset-window quota

Development

python -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"

Run the test suite:

python -m pytest -q

A healthy result is all tests passing with coverage ≥ 90%. The CI matrix tests Python 3.9 through 3.13 on every PR and push to main.

License

MIT — see LICENSE and NOTICE. Contributions accepted under the DCO (git commit -s).

Part of the Nous Ergon project.