Ecosystem boundaries

Agent Evidence connects adjacent systems without absorbing their ownership.

System	Owns	Evidence relationship
Agent Runtime	Execution facts, tasks, tool calls, permissions, snapshots.	Evidence references runtime ids and exports trust graphs.
Agent UI	Evidence display, citations, review panels, local affordances.	UI consumes evidence read models and submits review actions.
Agent Knowledge	Source-grounded knowledge packs and source metadata.	Evidence records selected, omitted, and contradicted source refs.
Agent Artifact	Content bytes, versions, diffs, previews, export bytes.	Evidence links artifact refs, versions, claims, and review facts.
Telemetry systems	Traces, spans, logs, metrics.	Evidence references trace/span ids and summarizes completeness.
Policy systems	Approval, risk, retention, access rules.	Evidence records decisions and redaction/retention facts.
A2A peers	Remote tasks, messages, artifacts.	Evidence preserves peer ids and remote artifact/source refs.
MCP servers	Tools, resources, prompts.	Evidence links tool/resource refs and invocation facts.
Compliance systems	Business rules and legal interpretation.	Evidence exports facts; compliance systems make domain verdicts.