feat: let agents read supervisor story graphs

Expose saved decisions, timelines and source evidence through read-only Story Graph tools across Model, Harness and local/remote OpenCode and Continue. Supervisor enablement and runtime assignments govern discovery and calls; reads do not invoke models or modify stored evidence. Remote use requires matching Desktop and Agent changes.

Make Continue discussion show the complete editable message with a separated destination and shared action layout. Sending uses the visible draft without reattaching removed context.

Validation: existing focused MCP, runtime, controlled Linux Host, discussion component and Electron layout checks plus typechecks; staged diff check passed. Cross-scope fact reuse, historical reconstruction and full package acceptance remain deferred.

Release note: Agents can consult saved supervisor decisions and their sources when continuing work. Continue discussion now lets you review and edit the complete message before sending.

src/main/remote-agent/protocol-remote-runtime-channel.ts

@@ -588,21 +588,23 @@ export class ProtocolRemoteRuntimeChannel
   async preparePrompt(
     preparation: z.input<typeof remotePromptOperationPreparationSchema>,
     imageToolBinding?: ImageToolBinding,
-    waitSignal?: AbortSignal
+    waitSignal?: AbortSignal,
+    storyGraphBinding?: import('../agent/knowledge-mcp-gateway').StoryGraphRemoteBinding
   ): Promise<
     z.infer<typeof remotePromptOperationAcceptanceSchema>
   > {
     this.#imageTool?.close()
     this.#imageTool = undefined
     const description = preparation.workMode === 'execute' ? await imageToolBinding?.describe() : undefined
+    const storyGraph = await storyGraphBinding?.available()
     waitSignal?.throwIfAborted()
     let imageTool: z.infer<typeof remotePromptOperationPreparationSchema>['imageTool']
-    if (description && imageToolBinding) {
+    if ((description && imageToolBinding) || storyGraph) {
       this.#assertCurrent()
       const binary = this.#state.client.allocateBinaryChannel?.({ kind: 'blob' })
       if (!binary) throw new Error('Remote image tool transport is unavailable')
-      imageTool = { channelId: binary.channelId, channelEpoch: binary.channelEpoch, description }
-      this.#imageTool = new MainImageToolSession(binary, imageToolBinding, waitSignal)
+      imageTool = { channelId: binary.channelId, channelEpoch: binary.channelEpoch, ...(description ? { description } : {}), ...(storyGraph ? { storyGraph: true } : {}) }
+      this.#imageTool = new MainImageToolSession(binary, imageToolBinding, waitSignal, storyGraphBinding)
     }
     try {
       const parsed = remotePromptOperationPreparationSchema.parse({ ...preparation, imageTool })