Changelog

1.8.1

Support oneOf alongside object schema constraints at the tool root and in nested schemas while enforcing both the sibling constraints and exactly one matching branch. Catalog preflight remains recursive and fail-closed.

Accept JSON Schema default annotations at every supported schema position without inserting values or relaxing constraint validation.

Add atomic, run/incarnation-fenced Conversation tool catalog staging and post-batch publication with pinned provider definitions, exact duplicate reconciliation, and ephemeral registry/authority handling for issue #42.
Support typed JSON Schema enum constraints, including Sigma's todo action and status properties. Preserve type/constraint validation and fail-closed unsupported keywords; cover registration, provider dispatch, and rejected enum calls with regressions for issue #36.

Add a single-owner embedded conversation driver with lazy provider streams, authorized tools, steering/follow-up, hook and interaction adapters, finite deadlines and conservative cancellation/recovery. Existing command APIs remain.
Ship adapter documentation and a scripted embedded example; add artifact consumers and optional read-only real Sigma provider/schema verification.
Include this package in the existing gated Hex release workflow; no publication is performed by local verification.
Support Sigma's current built-in tool schema constraints, including numeric minimums, nested array items and oneOf composition.
Add an atomic durable-store incarnation fence and a reusable host-adapter conformance runner for commit, restart, recovery, and failure scenarios.