Every agent action, as a replayable stream.

Orca writes every session transcript, trace, and audit log as a governed event stream. Tail it live, replay any session step by step, and trace the lineage of every memory, agent, and skill version.

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Transcripts as streams

Every session transcript, trace, and audit log is an append-only event stream over Kafka, Postgres, or Pulsar — not a black box.

Live tailing

Stream a running session's events over SSE and watch each LLM call, tool use, and sub-step as it happens.

Replay

Sessions resume — and can be reconstructed — by replaying their event log. Every run is reproducible.

Version lineage

Immutable version chains for memory, agents, and skills give you a complete, auditable history of what changed and when.

// Everything an agent does is one append-only event stream.// Tail it live over SSE…const live = await fetch(  `${ORCA}/v1/sessions/${session.id}/events/stream`,  { headers },);// …or replay the whole session from the start — every run is reproducible.const history = await fetch(  `${ORCA}/v1/sessions/${session.id}/events`,  { headers },).then((r) => r.json());