Arc 1.6.5

• Export and import selected rooms, decisions, artifacts, skills, and provenance without bundling Git repositories or workspace files. Preflight shows collisions and choices before anything is written.
• A guided activation flow connects stable Agent Profiles to external harnesses, local models, or hosted providers, then checks the selected runtime and capabilities before the agent joins a room.
• Quiet edge cues show when background work is active, needs attention, or has finished, while the Work surface keeps every membership-owned session visible.

• OpenAI activation now reuses a stored key without revealing it, omits unsupported temperature overrides, and shapes reasoning tool calls for compatible hosted turns.
• Testing or changing a model now uses the visible profile draft and current runtime state. Sessions are replaced only when execution settings change, and attachment confirmations remain bound to the intended runtime revision.
• File attachments now bind to the exact staged inbox path, and room work deadlines remain expired even when browser timers fire a fraction early.
• Managed session actions and room coordination changes reject stale daemon, membership, storage, and revision authority instead of applying work to outdated state.

Windows 10/11 (64-bit), or macOS 11+ on Apple Silicon.