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Allow failed agent turns to be forked (#2063)

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* fix(chat): allow failed turns to be forked

Failed turns can end in Paseo-generated timeline items without provider
message IDs. Anchor forks to canonical timeline positions while retaining
legacy boundaries for compatibility.

Place the fork summary before the new prompt and delimit it as structured
chat history.

* fix(chat): tighten fork boundary handling
This commit is contained in:
Mohamed Boudra
2026-07-15 16:30:42 +02:00
committed by GitHub
parent f06792ae89
commit 04e893417e
23 changed files with 549 additions and 108 deletions
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43
packages/protocol/src/messages.attachments.test.ts
View File

@@ -1,12 +1,55 @@
import { describe, expect, it } from "vitest";
import {
AgentForkContextRequestMessageSchema,
AgentForkContextResponseMessageSchema,
CreateAgentRequestMessageSchema,
CreatePaseoWorktreeRequestSchema,
SendAgentMessageRequestSchema,
} from "./messages.js";
describe("shared messages attachments", () => {
it("preserves an optional timeline cursor on fork-context messages", () => {
const boundaryCursor = { epoch: "timeline-1", seq: 42 };
const request = AgentForkContextRequestMessageSchema.parse({
type: "agent.fork_context.request",
agentId: "agent-1",
requestId: "fork-1",
boundaryCursor,
});
const response = AgentForkContextResponseMessageSchema.parse({
type: "agent.fork_context.response",
payload: {
requestId: "fork-1",
agentId: "agent-1",
attachment: null,
itemCount: 2,
boundaryMessageId: null,
boundaryCursor,
error: null,
},
});
expect(request.boundaryCursor).toEqual(boundaryCursor);
expect(response.payload.boundaryCursor).toEqual(boundaryCursor);
});
it("accepts a legacy fork-context response without a timeline cursor", () => {
expect(
AgentForkContextResponseMessageSchema.parse({
type: "agent.fork_context.response",
payload: {
requestId: "fork-1",
agentId: "agent-1",
attachment: null,
itemCount: 2,
boundaryMessageId: "assistant-1",
error: null,
},
}).payload.boundaryCursor,
).toBeUndefined();
});
it("keeps valid review attachments", () => {
const parsed = SendAgentMessageRequestSchema.parse({
type: "send_agent_message_request",

4
packages/protocol/src/messages.ts
View File

@@ -1321,6 +1321,7 @@ export const ProviderSubagentTimelineRequestMessageSchema = z.object({
export const AgentForkContextRequestMessageSchema = z.object({
type: z.literal("agent.fork_context.request"),
agentId: z.string(),
boundaryCursor: AgentTimelineCursorSchema.optional(),
boundaryMessageId: z.string().optional(),
requestId: z.string(),
});
@@ -2429,6 +2430,8 @@ export const ServerInfoStatusPayloadSchema = z
daemonSelfUpdate: z.boolean().optional(),
// COMPAT(agentForkContext): added in v0.1.102, remove gate after 2026-12-28.
agentForkContext: z.boolean().optional(),
// COMPAT(agentForkContextCursor): added in v0.1.108, remove gate after 2027-01-14.
agentForkContextCursor: z.boolean().optional(),
// COMPAT(providerSubagents): added in v0.1.107, remove gate after 2027-01-12.
providerSubagents: z.boolean().optional(),
// COMPAT(workspacePinning): added in v0.1.107, remove gate after 2027-01-12.
@@ -3129,6 +3132,7 @@ export const AgentForkContextResponseMessageSchema = z.object({
attachment: TextAttachmentSchema.nullable(),
itemCount: z.number().int().nonnegative(),
boundaryMessageId: z.string().nullable(),
boundaryCursor: AgentTimelineCursorSchema.nullable().optional(),
error: z.string().nullable(),
}),
});