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GET /api/v1/agent/state
{"program":"cam1","program_motion":0.31,
 "sources":[{"id":"guest","state":"connecting",
   "no_video":true,"no_audio":true}], ...}

228 bytes at 2 sources, 823 at 16.
Measured by a test, printed by gmx agent cost.

minimum shot length   8 s
rate limit            12 takes a minute
flash guard           ITU-R BT.1702-3

refused: -32003
data.rule, data.retry_after_ms

{"error":{"code":-32004,
 "message":"there is no source 'cam9'.
   The sources: cam1, cam2. Use one of those.",
 "data":{"id":"cam9","valid":["cam1","cam2"],
   "retryable":false}}}

"idempotency_key": "take-7f3a"
  honoured for 24 hours, a retried
  take is never doubled

"dry_run": true
  answers the diff it would make,
  read off the live state

dvv_control  action acquire
dvv_type     ...
→ LEASE_REVOKED
dvv_control  action yield_status
→ humanTookOver: true   (stop, tell the user)

dvv_group_open   → groupId
dvv_group_run    one action, every member,
                 concurrently, one result each
dvv_group_grow / dvv_group_shrink
any limb tool + groupId + member

core.subscribe {"ext":{"telemetry":{"hz":2},
                        "agent":true}}
event/telemetry     < 200 bytes a tick
event/agent.state   pushed on a threshold
notifications/gmx/agent.state   over MCP

psmux new-session -s work
claude         # teammates open in panes
prefix d       # detach, the team carries on
psmux attach -t work