Why a start or a turn failed. A closed vocabulary - a stage, never a message - so a failure can be reported anywhere without carrying text.
API reference sections
Schema
FailureStage
Type "scope_admission" or "context_capture" or "context_materialization" or "session_creation" or "provider_start" or "authority" or "turn"
Shape
One of 7 shapes:
Variant 1
The scope could not be admitted (P1.5).
"scope_admission"
Variant 2
A context item could not be captured (§7.2 step 2).
"context_capture"
Variant 3
A captured item could not be materialized (§7.2 step 3).
"context_materialization"
Variant 4
The provider session could not be created.
"session_creation"
Variant 5
The provider process did not start.
"provider_start"
Variant 6
The run's authority record or MCP endpoint could not be established (§7.3).
"authority"
Variant 7
The provider reported the turn failed.
"turn"
"scope_admission"The contract has no example values, so example bodies are generated from each schema: every field is shown with a placeholder of its type.
Generated from contract version 1. Last updated .