Approval provenance becomes the primary object.
The room starts with who asked for the work, what boundaries were active, what the agent proposed, and how approval was granted. Instead of scattering this across chat, app logs, and deployment notes, the evidence room makes approval provenance visible beside the final output.
This matters when a personal agent changes a website, replies to a customer, or resumes after a failure. The operator can see the latest permission and the exact reason the action was allowed.

Proof attached to the action
Screens, diffs, and URLs sit beside the decision they support.
Browser proof
For agents that inspect pages or operate in browser sessions, an evidence room stores screenshot checkpoints, tested URLs, failed selectors, and final visual proof.
Source grounding
Research claims should carry source links and dates. That keeps a useful distinction between agent inference and sourced statements.
Release receipt
The final receipt says what shipped, what changed, where it lives, and which open risks remain.

Operator review lane
The agent can continue moving while the owner reviews only the moments that matter.
Evidence rooms are narrower than audit logs and richer than screenshots.
Audit logs often prove that events happened, but they rarely explain why a delegated agent believed it had permission. Screenshots show state, but they do not preserve the instruction, source, approval, and follow-up path. Evidence rooms combine the high-context proof a human operator needs with the durable record a system can search later.
That combination is why evidence rooms are becoming a practical layer for computer-use cache workflows, message-native assistants, and agentic website operations.