hermetic-testing

Local GCP runtime for development and testing: unified Secret Manager, KMS, Eventarc, and IAM with full API compatibility. No credentials, no network, single process.

Deterministic evaluation harness for multi-turn LLM tool-use agents with hermetic in-memory SQLite sandboxing, automated failure taxonomy, fault injection, and zero-cost replay.

High-throughput financial time-series ingestion daemon. 80 AsyncIO lanes (7.9M records in 42s), ~2M writes/sec on TileDB 2D sparse arrays, POSIX fcntl locks, and 130 hermetic CI tests. Async multi-exchange OHLCV ingestion daemon with zero-copy TileDB storage, idempotent writes, backfill, and a copy-free hand-off to torch.

Record & replay any MCP server. Capture stdio · replay deterministically · test agent tools without the network.