session/setReasoningEffort

Sets the session’s standing reasoning-effort default; a turn carrying its own tier overrides it for that turn only (ADR 31255 D1).

Parameters

Type: SessionSetReasoningEffortParams

session/setReasoningEffort params: set the session’s standing reasoning-effort default. A turn carrying its own reasoningEffort overrides it for that turn only; the default overrides the host’s configured default. Same accept/reject and commandId idempotency shape as session/setModel.

Field	Type	Stability	Presence	Description
commandId	string		required	The idempotency handle (UUIDv7).
reasoningEffort	ReasoningEffort		required	The new session default: the closed eight-string tier vocabulary turn/start carries, spelled identically. Invalid tiers are invalid params. A default of max rides provider requests verbatim, never clamped (ADR 28621 D8, ADR 31131 D1).
sessionId	string		required	The target session.

Source

schema/msp/experimental/msp.schema.json#/methods/session~2FsetReasoningEffort

{
  "description": "Sets the session's standing reasoning-effort default; a turn carrying its own tier overrides it for that turn only (ADR 31255 D1).",
  "params": {
    "$ref": "#/$defs/SessionSetReasoningEffortParams"
  },
  "result": {
    "$ref": "#/$defs/SessionSetReasoningEffortResult"
  }
}