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Changelog

All notable changes to this project are documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.2.0] - 2026-05-25

Fixed

  • Security. JWTAuthValidator now requires a matching nonce claim when the runtime issues a challenge.
  • Security. ModelUse.subsetViolation(of:) uses a real glob-inclusion check so wildcard parents with suffix segments can no longer be escaped.
  • Lease durations validated at grant/refresh; handleLeaseRefresh surfaces errors instead of swallowing them.
  • PendingRegistry and ARCPClient.ping use a slot state machine so the waiter is registered before any timeout race.
  • Pending invocations are failed and progress/result streams are finished when the transport closes; invoke's send-error path cleans up state.
  • ARCPRuntime.register race window closed by inserting the jobManagers entry before iterating registeredHandlers.
  • Subscriptions track owner session id; cleanup runs when the session ends. subscribe.event envelopes are skipped during route(), preventing recursive cascade on empty filters.
  • StreamManager.subscribeInbound refuses a second subscriber for the same stream id with failedPrecondition.
  • Client dispatch: unmatched job.progress, job.result_chunk, and tool.error envelopes fall through to unhandled instead of being silently dropped or double-delivered.
  • Idempotency keys persist the terminal job.completed/failed/cancelled payload (scoped by principal + key) and replay it on duplicate invokes without re-running the handler.
  • Trace fields default to Tracing.current; JobManager propagates the inbound trace context across job lifecycle and handler emissions.
  • Artifact retention sweep starts in ARCPRuntime.init; lease expiry sweep starts in JobManager.init.
  • CredentialManager.rotate keeps every credential returned by the provisioner instead of silently discarding extras.
  • ULID generator preserves strict monotonicity across equal/backward clocks and overflow.
  • O(1) mailbox drain via head index with periodic compaction.
  • jwt-kit pinned under 5.3.0 to keep the package buildable on Swift 6.1.

Changed

  • Resume guide and CONFORMANCE.md narrowed to same-session replay only.
  • Interrupt support documented as wire-acked only — no handler observation callback.
  • Heartbeat recovery documented as telemetry-only.

Added

  • DocC comments across the most user-facing public surface.
  • .spi.yml for Swift Package Index DocC hosting.
  • Unit / integration coverage for Mailbox, LeaseManager, PendingRegistry, JWTAuth, client dispatch fallback, subscription cleanup, idempotency replay, and ULID burst.

[1.1.0] - 2026-05-22

Added

  • Full ARCP v1.1 wire surface: job.result_chunk (text / event / log / thought / metric / binary), crash-and-resume via IdempotencyKey, lease_constraints.expires_at, cost.budget, model.use, and provisioned_credentials lifecycle.
  • Transports: StdioTransport (NDJSON over stdio) and WebSocketTransport (client-side).
  • docs/ tree: architecture overview, RFC mapping, lifecycle state diagrams, troubleshooting, and §21 extension authoring guide.
  • Recipes/ runnable examples: email-vendor-leases, mcp-skill, multi-agent-budget, stream-resume.

[0.1.0] - 2026-05-10

Added

  • Initial reference SDK release aligned with ARCP protocol v1.1 (see README status).