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.
1 maintainer
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