feat(agent): agent interruptions

alembic/versions/e1a2b3c4d5f6_add_agent_session_status.py

@@ -0,0 +1,42 @@
+"""add_agent_session_status
+
+Revision ID: e1a2b3c4d5f6
+Revises: a3d7c9e8b4f2
+Create Date: 2026-05-26 00:00:00.000000
+
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "e1a2b3c4d5f6"
+down_revision: str | None = "a3d7c9e8b4f2"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "agent_session",
+        sa.Column(
+            "status",
+            sa.String(length=32),
+            server_default="idle",
+            nullable=False,
+        ),
+    )
+    op.create_index(
+        op.f("ix_agent_session_status"),
+        "agent_session",
+        ["status"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix_agent_session_status"), table_name="agent_session")
+    op.drop_column("agent_session", "status")

frontend/src/client/schemas.gen.ts

@@ -1212,6 +1212,11 @@ export const $AdminUserRead = {
   description: "Admin view of a user.",
 } as const
 
+export const $AgentCancelReason = {
+  type: "string",
+  enum: ["user_cancel", "worker_drain"],
+} as const
+
 export const $AgentCatalogListResponse = {
   properties: {
     items: {
@@ -3329,6 +3334,45 @@ export const $AgentPresetVersionReadMinimal = {
   description: "Metadata returned when listing immutable preset versions.",
 } as const
 
+export const $AgentSessionCancelRequest = {
+  properties: {
+    reason: {
+      $ref: "#/components/schemas/AgentCancelReason",
+      description: "Reason for requesting cancellation.",
+      default: "user_cancel",
+    },
+  },
+  type: "object",
+  title: "AgentSessionCancelRequest",
+  description: "Request schema for cancelling an active agent session turn.",
+} as const
+
+export const $AgentSessionCancelResponse = {
+  properties: {
+    session_id: {
+      type: "string",
+      format: "uuid",
+      title: "Session Id",
+    },
+    run_id: {
+      type: "string",
+      format: "uuid",
+      title: "Run Id",
+    },
+    reason: {
+      $ref: "#/components/schemas/AgentCancelReason",
+    },
+    turn_status: {
+      $ref: "#/components/schemas/AgentSessionStatus",
+    },
+  },
+  type: "object",
+  required: ["session_id", "run_id", "reason", "turn_status"],
+  title: "AgentSessionCancelResponse",
+  description:
+    "Response schema for an accepted agent session cancellation request.",
+} as const
+
 export const $AgentSessionCreate = {
   properties: {
     id: {
@@ -3593,6 +3637,10 @@ export const $AgentSessionRead = {
       ],
       title: "Last Stream Id",
     },
+    turn_status: {
+      $ref: "#/components/schemas/AgentSessionStatus",
+      default: "idle",
+    },
     parent_session_id: {
       anyOf: [
         {
@@ -3755,6 +3803,10 @@ export const $AgentSessionReadVercel = {
       ],
       title: "Last Stream Id",
     },
+    turn_status: {
+      $ref: "#/components/schemas/AgentSessionStatus",
+      default: "idle",
+    },
     parent_session_id: {
       anyOf: [
         {
@@ -3925,6 +3977,10 @@ export const $AgentSessionReadWithMessages = {
       ],
       title: "Last Stream Id",
     },
+    turn_status: {
+      $ref: "#/components/schemas/AgentSessionStatus",
+      default: "idle",
+    },
     parent_session_id: {
       anyOf: [
         {
@@ -3974,6 +4030,13 @@ export const $AgentSessionReadWithMessages = {
   description: "Response schema for agent session with message history.",
 } as const
 
+export const $AgentSessionStatus = {
+  type: "string",
+  enum: ["idle", "running", "waiting_for_approval", "stopped", "failed"],
+  title: "AgentSessionStatus",
+  description: "Lifecycle state for an agent session turn.",
+} as const
+
 export const $AgentSessionUpdate = {
   properties: {
     title: {
@@ -8911,6 +8974,20 @@ export const $ChatMessage = {
       description:
         "Compaction status data for badge rendering (for kind=COMPACTION)",
     },
+    interrupt: {
+      anyOf: [
+        {
+          additionalProperties: true,
+          type: "object",
+        },
+        {
+          type: "null",
+        },
+      ],
+      title: "Interrupt",
+      description:
+        "Interruption status data for badge rendering (for kind=INTERRUPT)",
+    },
   },
   type: "object",
   required: ["id"],
@@ -8920,7 +8997,8 @@ export const $ChatMessage = {
 This model supports multiple message kinds:
 - kind=CHAT_MESSAGE: Contains message field with user/assistant content
 - kind=APPROVAL_REQUEST/APPROVAL_DECISION: Contains approval field with approval data
-- kind=COMPACTION: Contains compaction field with compaction status data`,
+- kind=COMPACTION: Contains compaction field with compaction status data
+- kind=INTERRUPT: Contains interrupt field with interruption status data`,
 } as const
 
 export const $ChatRead = {
@@ -15249,6 +15327,7 @@ export const $MessageKind = {
     "approval-decision",
     "internal",
     "compaction",
+    "interrupt",
   ],
   title: "MessageKind",
   description: "The type/kind of message stored in the chat.",

frontend/src/client/services.gen.ts

@@ -161,6 +161,8 @@ import type {
   AgentPresetsRestoreAgentPresetVersionResponse,
   AgentPresetsUpdateAgentPresetData,
   AgentPresetsUpdateAgentPresetResponse,
+  AgentSessionsCancelSessionData,
+  AgentSessionsCancelSessionResponse,
   AgentSessionsCreateSessionData,
   AgentSessionsCreateSessionResponse,
   AgentSessionsDeleteSessionData,
@@ -6611,6 +6613,34 @@ export const agentSessionsGetSessionVercel = (
   })
 }
 
+/**
+ * Cancel Session
+ * Request graceful cancellation for the active agent session turn.
+ * @param data The data for the request.
+ * @param data.sessionId
+ * @param data.workspaceId
+ * @param data.requestBody
+ * @returns AgentSessionCancelResponse Successful Response
+ * @throws ApiError
+ */
+export const agentSessionsCancelSession = (
+  data: AgentSessionsCancelSessionData
+): CancelablePromise<AgentSessionsCancelSessionResponse> => {
+  return __request(OpenAPI, {
+    method: "POST",
+    url: "/workspaces/{workspace_id}/agent/sessions/{session_id}/cancel",
+    path: {
+      session_id: data.sessionId,
+      workspace_id: data.workspaceId,
+    },
+    body: data.requestBody,
+    mediaType: "application/json",
+    errors: {
+      422: "Validation Error",
+    },
+  })
+}
+
 /**
  * Send Message
  * Send a message to the agent session with streaming response.

frontend/src/client/types.gen.ts

@@ -319,6 +319,8 @@ export type AdminUserRead = {
   last_login_at?: string | null
 }
 
+export type AgentCancelReason = "user_cancel" | "worker_drain"
+
 /**
  * List catalog entries with pagination.
  */
@@ -766,6 +768,26 @@ export type AgentPresetVersionReadMinimal = {
   updated_at: string
 }
 
+/**
+ * Request schema for cancelling an active agent session turn.
+ */
+export type AgentSessionCancelRequest = {
+  /**
+   * Reason for requesting cancellation.
+   */
+  reason?: AgentCancelReason
+}
+
+/**
+ * Response schema for an accepted agent session cancellation request.
+ */
+export type AgentSessionCancelResponse = {
+  session_id: string
+  run_id: string
+  reason: AgentCancelReason
+  turn_status: AgentSessionStatus
+}
+
 /**
  * Request schema for creating an agent session.
  */
@@ -858,6 +880,7 @@ export type AgentSessionRead = {
   agents_binding?: ResolvedAgentsConfig | null
   harness_type: string | null
   last_stream_id?: string | null
+  turn_status?: AgentSessionStatus
   parent_session_id?: string | null
   created_at: string
   updated_at: string
@@ -882,6 +905,7 @@ export type AgentSessionReadVercel = {
   agents_binding?: ResolvedAgentsConfig | null
   harness_type: string | null
   last_stream_id?: string | null
+  turn_status?: AgentSessionStatus
   parent_session_id?: string | null
   created_at: string
   updated_at: string
@@ -910,6 +934,7 @@ export type AgentSessionReadWithMessages = {
   agents_binding?: ResolvedAgentsConfig | null
   harness_type: string | null
   last_stream_id?: string | null
+  turn_status?: AgentSessionStatus
   parent_session_id?: string | null
   created_at: string
   updated_at: string
@@ -919,6 +944,16 @@ export type AgentSessionReadWithMessages = {
   messages?: Array<unknown>
 }
 
+/**
+ * Lifecycle state for an agent session turn.
+ */
+export type AgentSessionStatus =
+  | "idle"
+  | "running"
+  | "waiting_for_approval"
+  | "stopped"
+  | "failed"
+
 /**
  * Request schema for updating an agent session.
  */
@@ -2343,6 +2378,7 @@ export type ChannelType = "slack"
  * - kind=CHAT_MESSAGE: Contains message field with user/assistant content
  * - kind=APPROVAL_REQUEST/APPROVAL_DECISION: Contains approval field with approval data
  * - kind=COMPACTION: Contains compaction field with compaction status data
+ * - kind=INTERRUPT: Contains interrupt field with interruption status data
  */
 export type ChatMessage = {
   /**
@@ -2375,6 +2411,12 @@ export type ChatMessage = {
   compaction?: {
     [key: string]: unknown
   } | null
+  /**
+   * Interruption status data for badge rendering (for kind=INTERRUPT)
+   */
+  interrupt?: {
+    [key: string]: unknown
+  } | null
 }
 
 /**
@@ -4693,6 +4735,7 @@ export type MessageKind =
   | "approval-decision"
   | "internal"
   | "compaction"
+  | "interrupt"
 
 export type ModelConfig = {
   /**
@@ -10738,6 +10781,14 @@ export type AgentSessionsGetSessionVercelResponse =
   | AgentSessionReadVercel
   | ChatReadVercel
 
+export type AgentSessionsCancelSessionData = {
+  requestBody?: AgentSessionCancelRequest | null
+  sessionId: string
+  workspaceId: string
+}
+
+export type AgentSessionsCancelSessionResponse = AgentSessionCancelResponse
+
 export type AgentSessionsSendMessageData = {
   requestBody: VercelChatRequest | ContinueRunRequest
   sessionId: string
@@ -15729,6 +15780,21 @@ export type $OpenApiTs = {
       }
     }
   }
+  "/workspaces/{workspace_id}/agent/sessions/{session_id}/cancel": {
+    post: {
+      req: AgentSessionsCancelSessionData
+      res: {
+        /**
+         * Successful Response
+         */
+        200: AgentSessionCancelResponse
+        /**
+         * Validation Error
+         */
+        422: HTTPValidationError
+      }
+    }
+  }
   "/workspaces/{workspace_id}/agent/sessions/{session_id}/messages": {
     post: {
       req: AgentSessionsSendMessageData