chat: add judge confirmation rationale

[justschen]

Summary

Adds model-judge confirmation rationale for the SDK auto-approval flow, mirroring microsoft/vscode#325547.

• Add typed judge rationale to chat/toolCallReady
• Persist the rationale in pending-confirmation state
• Propagate it through all client reducers
• Regenerate schemas and SDK types
• Add reducer fixtures and a changelog fragment

[Copilot]

Pull request overview

Adds a typed “model judge” confirmation rationale to the chat/toolCallReady action and carries it through pending-confirmation state across the protocol schema and all generated SDKs, with updated reducer fixtures and a changelog fragment.

Changes:

• Introduce ToolCallJudgeConfirmationReason and plumb confirmationReason through chat/toolCallReady into ToolCallPendingConfirmationState.
• Regenerate protocol JSON schemas and all client SDK state/action types and reducers (Swift/Rust/Kotlin/Go).
• Update reducer fixtures and add a docs/.changes/ changelog fragment.

Show a summary per file

File	Description
types/test-cases/reducers/220-toolcall-actions-update-meta.json	Updates expected reducer state to include confirmationReason.
types/test-cases/reducers/127-toolcallready-with-confirmation-options.json	Adds a judge rationale payload in the action and expected pending-confirmation state.
types/test-cases/reducers/111-toolcall-pending-confirmation-sets-input-needed-status.json	Updates expected pending-confirmation state to include confirmationReason.
types/test-cases/reducers/026-toolcallready-transitions-running-tool-back-to-pending-confirmation.json	Updates expected transition output to include confirmationReason.
types/index.ts	Re-exports the new judge rationale types/kinds.
types/channels-chat/state.ts	Defines ToolCallJudgeConfirmationReasonKind and ToolCallJudgeConfirmationReason; adds confirmationReason to pending-confirmation state.
types/channels-chat/reducer.ts	Persists confirmationReason into ToolCallPendingConfirmationState when handling chat/toolCallReady.
types/channels-chat/actions.ts	Adds typed confirmationReason to ChatToolCallReadyAction.
scripts/generate-swift.ts	Includes the new kind/struct in Swift codegen lists.
scripts/generate-rust.ts	Includes the new kind/struct in Rust codegen lists and action imports.
scripts/generate-kotlin.ts	Includes the new kind/struct in Kotlin codegen lists.
scripts/generate-go.ts	Includes the new kind/struct in Go codegen lists.
schema/state.schema.json	Adds ToolCallJudgeConfirmationReason and references it from pending-confirmation state.
schema/notifications.schema.json	Adds ToolCallJudgeConfirmationReason and references it where pending-confirmation appears in notifications.
schema/errors.schema.json	Adds ToolCallJudgeConfirmationReason and references it where pending-confirmation appears in errors.
schema/commands.schema.json	Adds ToolCallJudgeConfirmationReason and references it where pending-confirmation appears in commands.
schema/actions.schema.json	Adds ToolCallJudgeConfirmationReason and references it from chat/toolCallReady.
docs/.changes/20260713-tool-call-judge-confirmation.json	Adds a changelog fragment announcing the new judge rationale support.
clients/swift/AgentHostProtocol/Sources/AgentHostProtocol/Reducers.swift	Plumbs confirmationReason into Swift pending-confirmation reducer output.
clients/swift/AgentHostProtocol/Sources/AgentHostProtocol/Generated/State.generated.swift	Adds generated Swift types/fields for the judge rationale.
clients/swift/AgentHostProtocol/Sources/AgentHostProtocol/Generated/Actions.generated.swift	Adds generated Swift action field for confirmationReason.
clients/rust/crates/ahp/src/reducers.rs	Plumbs confirmation_reason into Rust pending-confirmation reducer output.
clients/rust/crates/ahp-types/src/state.rs	Adds Rust types/fields for the judge rationale in pending-confirmation state.
clients/rust/crates/ahp-types/src/actions.rs	Adds Rust action field for confirmation_reason.
clients/kotlin/src/main/kotlin/com/microsoft/agenthostprotocol/Reducers.kt	Plumbs confirmationReason into Kotlin pending-confirmation reducer output.
clients/kotlin/src/main/kotlin/com/microsoft/agenthostprotocol/generated/State.generated.kt	Adds generated Kotlin types/fields for the judge rationale.
clients/kotlin/src/main/kotlin/com/microsoft/agenthostprotocol/generated/Actions.generated.kt	Adds generated Kotlin action field for confirmationReason.
clients/go/ahptypes/state.generated.go	Adds generated Go types/fields for the judge rationale in pending-confirmation state.
clients/go/ahptypes/actions.generated.go	Adds generated Go action field for ConfirmationReason.
clients/go/ahp/reducers.go	Plumbs ConfirmationReason into Go pending-confirmation reducer output.

Review details

• Files reviewed: 26/30 changed files
• Comments generated: 1
• Review effort level: Low