agentship-core

The AgentShip kernel: spec, context, runtime, registry, errors, middleware, and the zero-dependency echo engine. Vendor-free — depends only on pydantic and pyyaml. Import as agentship.

Vendor-free by contract — and guarded against drift

The kernel cannot import OpenTelemetry, a2a-sdk, or any other vendor library (design §4.6): engine and eval hooks must work with only agentship-core installed. That forces us to keep a few small implementations of our own — the semantic-convention key constants, the in-memory RecordingObserver, the A2A wire models, and the JWT/JWKS seam. We do not just trust those to match the standards they claim to speak; each is pinned to its upstream by a conformance guard — a test in the relevant package that validates our output against the real library. So the code stays thin and vendor-free, and it still can't silently drift.

See docs/decisions/0001-integrate-not-invent.md for the delegations and the keep-thin-and-guard decisions.