feat(api): add finite durable session history pages (#34097)

packages/client/src/generated-effect/client.ts

@@ -149,12 +149,24 @@ const Endpoint0_12 = (raw: RawClient["server.session"]) => (input: Endpoint0_12I
     Effect.map((value) => value.data),
   )
 
-type Endpoint0_13Request = Parameters<RawClient["server.session"]["session.events"]>[0]
+type Endpoint0_13Request = Parameters<RawClient["server.session"]["session.history"]>[0]
 type Endpoint0_13Input = {
   readonly sessionID: Endpoint0_13Request["params"]["sessionID"]
+  readonly limit?: Endpoint0_13Request["query"]["limit"]
   readonly after?: Endpoint0_13Request["query"]["after"]
 }
 const Endpoint0_13 = (raw: RawClient["server.session"]) => (input: Endpoint0_13Input) =>
+  raw["session.history"]({
+    params: { sessionID: input.sessionID },
+    query: { limit: input.limit, after: input.after },
+  }).pipe(Effect.mapError(mapClientError))
+
+type Endpoint0_14Request = Parameters<RawClient["server.session"]["session.events"]>[0]
+type Endpoint0_14Input = {
+  readonly sessionID: Endpoint0_14Request["params"]["sessionID"]
+  readonly after?: Endpoint0_14Request["query"]["after"]
+}
+const Endpoint0_14 = (raw: RawClient["server.session"]) => (input: Endpoint0_14Input) =>
   Stream.unwrap(
     raw["session.events"]({ params: { sessionID: input.sessionID }, query: { after: input.after } }).pipe(
       Effect.mapError(mapClientError),
@@ -162,17 +174,17 @@ const Endpoint0_13 = (raw: RawClient["server.session"]) => (input: Endpoint0_13I
     ),
   )
 
-type Endpoint0_14Request = Parameters<RawClient["server.session"]["session.interrupt"]>[0]
-type Endpoint0_14Input = { readonly sessionID: Endpoint0_14Request["params"]["sessionID"] }
-const Endpoint0_14 = (raw: RawClient["server.session"]) => (input: Endpoint0_14Input) =>
+type Endpoint0_15Request = Parameters<RawClient["server.session"]["session.interrupt"]>[0]
+type Endpoint0_15Input = { readonly sessionID: Endpoint0_15Request["params"]["sessionID"] }
+const Endpoint0_15 = (raw: RawClient["server.session"]) => (input: Endpoint0_15Input) =>
   raw["session.interrupt"]({ params: { sessionID: input.sessionID } }).pipe(Effect.mapError(mapClientError))
 
-type Endpoint0_15Request = Parameters<RawClient["server.session"]["session.message"]>[0]
-type Endpoint0_15Input = {
-  readonly sessionID: Endpoint0_15Request["params"]["sessionID"]
-  readonly messageID: Endpoint0_15Request["params"]["messageID"]
+type Endpoint0_16Request = Parameters<RawClient["server.session"]["session.message"]>[0]
+type Endpoint0_16Input = {
+  readonly sessionID: Endpoint0_16Request["params"]["sessionID"]
+  readonly messageID: Endpoint0_16Request["params"]["messageID"]
 }
-const Endpoint0_15 = (raw: RawClient["server.session"]) => (input: Endpoint0_15Input) =>
+const Endpoint0_16 = (raw: RawClient["server.session"]) => (input: Endpoint0_16Input) =>
   raw["session.message"]({ params: { sessionID: input.sessionID, messageID: input.messageID } }).pipe(
     Effect.mapError(mapClientError),
     Effect.map((value) => value.data),
@@ -192,9 +204,10 @@ const adaptGroup0 = (raw: RawClient["server.session"]) => ({
   clear: Endpoint0_10(raw),
   commit: Endpoint0_11(raw),
   context: Endpoint0_12(raw),
-  events: Endpoint0_13(raw),
-  interrupt: Endpoint0_14(raw),
-  message: Endpoint0_15(raw),
+  history: Endpoint0_13(raw),
+  events: Endpoint0_14(raw),
+  interrupt: Endpoint0_15(raw),
+  message: Endpoint0_16(raw),
 })
 
 const adaptClient = (raw: RawClient) => ({ sessions: adaptGroup0(raw["server.session"]) })

packages/client/src/generated/client.ts

@@ -24,6 +24,8 @@ import type {
   SessionsCommitOutput,
   SessionsContextInput,
   SessionsContextOutput,
+  SessionsHistoryInput,
+  SessionsHistoryOutput,
   SessionsEventsInput,
   SessionsEventsOutput,
   SessionsInterruptInput,
@@ -324,6 +326,18 @@ export function make(options: ClientOptions) {
           },
           requestOptions,
         ).then((value) => value.data),
+      history: (input: SessionsHistoryInput, requestOptions?: RequestOptions) =>
+        request<SessionsHistoryOutput>(
+          {
+            method: "GET",
+            path: `/api/session/${encodeURIComponent(input.sessionID)}/history`,
+            query: { limit: input.limit, after: input.after },
+            successStatus: 200,
+            declaredStatuses: [404, 400, 401],
+            empty: false,
+          },
+          requestOptions,
+        ),
       events: (input: SessionsEventsInput, requestOptions?: RequestOptions): AsyncIterable<SessionsEventsOutput> =>
         sse<SessionsEventsOutput>(
           {

packages/client/src/generated/types.ts

@@ -67,7 +67,7 @@ export const isUnknownError = (value: unknown): value is UnknownError =>
 export type SessionsListInput = {
   readonly workspace?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -77,7 +77,7 @@ export type SessionsListInput = {
   }["workspace"]
   readonly limit?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -87,7 +87,7 @@ export type SessionsListInput = {
   }["limit"]
   readonly order?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -97,7 +97,7 @@ export type SessionsListInput = {
   }["order"]
   readonly search?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -107,7 +107,7 @@ export type SessionsListInput = {
   }["search"]
   readonly directory?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -117,7 +117,7 @@ export type SessionsListInput = {
   }["directory"]
   readonly project?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -127,7 +127,7 @@ export type SessionsListInput = {
   }["project"]
   readonly subpath?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -137,7 +137,7 @@ export type SessionsListInput = {
   }["subpath"]
   readonly cursor?: {
     readonly workspace?: string | undefined
-    readonly limit?: string | undefined
+    readonly limit?: number | undefined
     readonly order?: "asc" | "desc" | undefined
     readonly search?: string | undefined
     readonly directory?: string | undefined
@@ -591,9 +591,469 @@ export type SessionsContextOutput = {
   >
 }["data"]
 
+export type SessionsHistoryInput = {
+  readonly sessionID: { readonly sessionID: string }["sessionID"]
+  readonly limit?: { readonly limit?: number | undefined; readonly after?: number | undefined }["limit"]
+  readonly after?: { readonly limit?: number | undefined; readonly after?: number | undefined }["after"]
+}
+
+export type SessionsHistoryOutput = {
+  readonly data: ReadonlyArray<
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.agent.switched"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly agent: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.model.switched"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly model: { readonly id: string; readonly providerID: string; readonly variant?: string }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.moved"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly location: { readonly directory: string; readonly workspaceID?: string }
+          readonly subdirectory?: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.prompted"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly prompt: {
+            readonly text: string
+            readonly files?: ReadonlyArray<{
+              readonly uri: string
+              readonly mime: string
+              readonly name?: string
+              readonly description?: string
+              readonly source?: { readonly start: number; readonly end: number; readonly text: string }
+            }>
+            readonly agents?: ReadonlyArray<{
+              readonly name: string
+              readonly source?: { readonly start: number; readonly end: number; readonly text: string }
+            }>
+          }
+          readonly delivery: "steer" | "queue"
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.prompt.admitted"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly prompt: {
+            readonly text: string
+            readonly files?: ReadonlyArray<{
+              readonly uri: string
+              readonly mime: string
+              readonly name?: string
+              readonly description?: string
+              readonly source?: { readonly start: number; readonly end: number; readonly text: string }
+            }>
+            readonly agents?: ReadonlyArray<{
+              readonly name: string
+              readonly source?: { readonly start: number; readonly end: number; readonly text: string }
+            }>
+          }
+          readonly delivery: "steer" | "queue"
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.context.updated"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly text: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.synthetic"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly text: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.shell.started"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly callID: string
+          readonly command: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.shell.ended"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly callID: string
+          readonly output: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.step.started"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly agent: string
+          readonly model: { readonly id: string; readonly providerID: string; readonly variant?: string }
+          readonly snapshot?: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.step.ended"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly finish: string
+          readonly cost: number
+          readonly tokens: {
+            readonly input: number
+            readonly output: number
+            readonly reasoning: number
+            readonly cache: { readonly read: number; readonly write: number }
+          }
+          readonly snapshot?: string
+          readonly files?: ReadonlyArray<string>
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.step.failed"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly error: { readonly type: "unknown"; readonly message: string }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.text.started"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly textID: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.text.ended"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly textID: string
+          readonly text: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.tool.input.started"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly callID: string
+          readonly name: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.tool.input.ended"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly callID: string
+          readonly text: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.tool.called"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly callID: string
+          readonly tool: string
+          readonly input: { readonly [x: string]: JsonValue }
+          readonly provider: {
+            readonly executed: boolean
+            readonly metadata?: { readonly [x: string]: { readonly [x: string]: JsonValue } }
+          }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.tool.progress"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly callID: string
+          readonly structured: { readonly [x: string]: JsonValue }
+          readonly content: ReadonlyArray<
+            | { readonly type: "text"; readonly text: string }
+            | { readonly type: "file"; readonly uri: string; readonly mime: string; readonly name?: string }
+          >
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.tool.success"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly callID: string
+          readonly structured: { readonly [x: string]: JsonValue }
+          readonly content: ReadonlyArray<
+            | { readonly type: "text"; readonly text: string }
+            | { readonly type: "file"; readonly uri: string; readonly mime: string; readonly name?: string }
+          >
+          readonly outputPaths?: ReadonlyArray<string>
+          readonly result?: JsonValue
+          readonly provider: {
+            readonly executed: boolean
+            readonly metadata?: { readonly [x: string]: { readonly [x: string]: JsonValue } }
+          }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.tool.failed"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly callID: string
+          readonly error: { readonly type: "unknown"; readonly message: string }
+          readonly result?: JsonValue
+          readonly provider: {
+            readonly executed: boolean
+            readonly metadata?: { readonly [x: string]: { readonly [x: string]: JsonValue } }
+          }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.reasoning.started"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly reasoningID: string
+          readonly providerMetadata?: { readonly [x: string]: { readonly [x: string]: JsonValue } }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.reasoning.ended"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly assistantMessageID: string
+          readonly reasoningID: string
+          readonly text: string
+          readonly providerMetadata?: { readonly [x: string]: { readonly [x: string]: JsonValue } }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.retried"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly attempt: number
+          readonly error: {
+            readonly message: string
+            readonly statusCode?: number
+            readonly isRetryable: boolean
+            readonly responseHeaders?: { readonly [x: string]: string }
+            readonly responseBody?: string
+            readonly metadata?: { readonly [x: string]: string }
+          }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.compaction.started"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly reason: "auto" | "manual"
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.compaction.ended"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly messageID: string
+          readonly reason: "auto" | "manual"
+          readonly text: string
+          readonly recent: string
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.revert.staged"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: {
+          readonly timestamp: number
+          readonly sessionID: string
+          readonly revert: {
+            readonly messageID: string
+            readonly partID?: string
+            readonly snapshot?: string
+            readonly diff?: string
+            readonly files?: ReadonlyArray<{
+              readonly path: string
+              readonly status: "added" | "modified" | "deleted"
+              readonly additions: number
+              readonly deletions: number
+              readonly patch: string
+            }>
+          }
+        }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.revert.cleared"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: { readonly timestamp: number; readonly sessionID: string }
+      }
+    | {
+        readonly id: string
+        readonly metadata?: { readonly [x: string]: JsonValue }
+        readonly type: "session.next.revert.committed"
+        readonly durable?: { readonly aggregateID: string; readonly seq: number; readonly version: number }
+        readonly location?: { readonly directory: string; readonly workspaceID?: string }
+        readonly data: { readonly timestamp: number; readonly sessionID: string; readonly messageID: string }
+      }
+  >
+  readonly hasMore: boolean
+}
+
 export type SessionsEventsInput = {
   readonly sessionID: { readonly sessionID: string }["sessionID"]
-  readonly after?: { readonly after?: string | undefined }["after"]
+  readonly after?: { readonly after?: number | undefined }["after"]
 }
 
 export type SessionsEventsOutput =

packages/client/test/effect.test.ts

@@ -1,7 +1,16 @@
 import { expect, test } from "bun:test"
 import { DateTime, Effect, Stream } from "effect"
 import { HttpClient, HttpClientResponse } from "effect/unstable/http"
-import { AbsolutePath, Agent, Location, Model, OpenCode, Prompt, Session, SessionMessage } from "../src/effect"
+import {
+  AbsolutePath,
+  Agent,
+  Location,
+  Model,
+  OpenCode,
+  Prompt,
+  Session,
+  SessionMessage,
+} from "../src/effect"
 
 test("sessions.get returns the decoded Effect projection", async () => {
   const httpClient = HttpClient.make((request) =>
@@ -16,6 +25,8 @@ test("sessions.get returns the decoded Effect projection", async () => {
 })
 
 test("session methods retain decoded Effect inputs and outputs", async () => {
+  const historyQueries: Array<Record<string, string>> = []
+  let historyPage = 0
   const httpClient = HttpClient.make((request) => {
     const url = request.url
     if (url.includes("/event")) {
@@ -28,6 +39,20 @@ test("session methods retain decoded Effect inputs and outputs", async () => {
         ),
       )
     }
+    if (url.includes("/history")) {
+      historyPage++
+      historyQueries.push(Object.fromEntries(request.urlParams.params))
+      return Effect.succeed(
+        HttpClientResponse.fromWeb(
+          request,
+          Response.json(
+            historyPage === 1
+              ? { data: [modelSwitchedEvent], hasMore: true }
+              : { data: [], hasMore: false },
+          ),
+        ),
+      )
+    }
     if (url.includes("/prompt")) {
       return Effect.succeed(HttpClientResponse.fromWeb(request, Response.json(admission)))
     }
@@ -72,6 +97,18 @@ test("session methods retain decoded Effect inputs and outputs", async () => {
     yield* client.sessions.compact({ sessionID: Session.ID.make("ses_test") })
     yield* client.sessions.wait({ sessionID: Session.ID.make("ses_test") })
     const context = yield* client.sessions.context({ sessionID: Session.ID.make("ses_test") })
+    const history = yield* client.sessions.history({
+      sessionID: Session.ID.make("ses_test"),
+      after: 0,
+      limit: 1,
+    })
+    const historyNext = history.hasMore
+      ? yield* client.sessions.history({
+          sessionID: Session.ID.make("ses_test"),
+          after: history.data.at(-1)?.durable?.seq,
+          limit: 2,
+        })
+      : undefined
     const events = yield* client.sessions
       .events({ sessionID: Session.ID.make("ses_test"), after: 0 })
       .pipe(Stream.runCollect)
@@ -80,7 +117,7 @@ test("session methods retain decoded Effect inputs and outputs", async () => {
       sessionID: Session.ID.make("ses_test"),
       messageID: SessionMessage.ID.make("msg_model"),
     })
-    return { page, active, created, admitted, context, events, message }
+    return { page, active, created, admitted, context, history, historyNext, events, message }
   }).pipe(Effect.provideService(HttpClient.HttpClient, httpClient), Effect.runPromise)
 
   expect(DateTime.toEpochMillis(result.page.data[0].time.created)).toBe(1_717_171_717_000)
@@ -92,10 +129,39 @@ test("session methods retain decoded Effect inputs and outputs", async () => {
   expect(Object.getPrototypeOf(result.admitted.prompt)).toBe(Object.prototype)
   expect(DateTime.toEpochMillis(result.admitted.timeCreated)).toBe(1_717_171_717_000)
   expect(result.context).toEqual([])
+  expect(DateTime.toEpochMillis(result.history.data[0].data.timestamp)).toBe(1_717_171_717_000)
+  expect(result.history).toEqual(expect.objectContaining({ hasMore: true }))
+  expect(result.historyNext).toEqual({ data: [], hasMore: false })
+  expect(historyQueries[0]).toEqual({ limit: "1", after: "0" })
+  expect(historyQueries[1]).toEqual({ limit: "2", after: "1" })
   expect(DateTime.toEpochMillis(result.events[0].data.timestamp)).toBe(1_717_171_717_000)
   expect(result.message).toEqual(expect.objectContaining({ id: "msg_model", type: "model-switched" }))
 })
 
+test("sessions.history retains the typed SessionNotFoundError", async () => {
+  const httpClient = HttpClient.make((request) =>
+    Effect.succeed(
+      HttpClientResponse.fromWeb(
+        request,
+        Response.json(
+          { _tag: "SessionNotFoundError", sessionID: "ses_missing", message: "Session not found" },
+          { status: 404 },
+        ),
+      ),
+    ),
+  )
+  const error = await Effect.gen(function* () {
+    const client = yield* OpenCode.make({ baseUrl: "http://localhost:3000" })
+    return yield* client.sessions
+      .history({
+        sessionID: Session.ID.make("ses_missing"),
+      })
+      .pipe(Effect.flip)
+  }).pipe(Effect.provideService(HttpClient.HttpClient, httpClient), Effect.runPromise)
+
+  expect(error._tag).toBe("SessionNotFoundError")
+})
+
 const session = {
   data: {
     id: "ses_test",

packages/client/test/promise.test.ts

@@ -1,5 +1,5 @@
 import { expect, test } from "bun:test"
-import { isUnauthorizedError, OpenCode } from "../src"
+import { isSessionNotFoundError, isUnauthorizedError, OpenCode } from "../src"
 
 test("sessions.get returns the wire projection", async () => {
   const client = OpenCode.make({
@@ -19,6 +19,7 @@ test("sessions.get returns the wire projection", async () => {
 
 test("session methods use the public HTTP contract", async () => {
   const requests: Array<{ url: string; init?: RequestInit }> = []
+  let historyPage = 0
   const client = OpenCode.make({
     baseUrl: "http://localhost:3000",
     fetch: async (input, init) => {
@@ -29,6 +30,14 @@ test("session methods use the public HTTP contract", async () => {
           headers: { "content-type": "text/event-stream" },
         })
       }
+      if (url.includes("/history")) {
+        historyPage++
+        return Response.json(
+          historyPage === 1
+            ? { data: [modelSwitchedEvent], hasMore: true }
+            : { data: [], hasMore: false },
+        )
+      }
       if (url.includes("/prompt")) return Response.json(admission)
       if (url.includes("/context")) return Response.json({ data: [] })
       if (url.includes("/message/")) return Response.json({ data: modelSwitchedMessage })
@@ -39,7 +48,7 @@ test("session methods use the public HTTP contract", async () => {
     },
   })
 
-  const page = await client.sessions.list({ limit: "10", order: "desc" })
+  const page = await client.sessions.list({ limit: 10, order: "desc" })
   const active = await client.sessions.active()
   const created = await client.sessions.create({ location: { directory: "/tmp/project" } })
   await client.sessions.switchAgent({ sessionID: "ses_test", agent: "build" })
@@ -55,8 +64,13 @@ test("session methods use the public HTTP contract", async () => {
   await client.sessions.compact({ sessionID: "ses_test" })
   await client.sessions.wait({ sessionID: "ses_test" })
   const context = await client.sessions.context({ sessionID: "ses_test" })
+  const history = await client.sessions.history({ sessionID: "ses_test", after: 0, limit: 1 })
+  const historyAfter = history.data.at(-1)?.durable?.seq
+  const historyNext = history.hasMore
+    ? await client.sessions.history({ sessionID: "ses_test", after: historyAfter, limit: 2 })
+    : undefined
   const events = []
-  for await (const event of client.sessions.events({ sessionID: "ses_test", after: "0" })) events.push(event)
+  for await (const event of client.sessions.events({ sessionID: "ses_test", after: 0 })) events.push(event)
   await client.sessions.interrupt({ sessionID: "ses_test" })
   const message = await client.sessions.message({ sessionID: "ses_test", messageID: "msg_model" })
 
@@ -65,6 +79,8 @@ test("session methods use the public HTTP contract", async () => {
   expect(created.id).toBe("ses_test")
   expect(admitted.id).toBe("msg_test")
   expect(context).toEqual([])
+  expect(history).toEqual({ data: [modelSwitchedEvent], hasMore: true })
+  expect(historyNext).toEqual({ data: [], hasMore: false })
   expect(events).toEqual([modelSwitchedEvent])
   expect(message).toEqual(modelSwitchedMessage)
   expect(requests.map((request) => [request.init?.method, request.url])).toEqual([
@@ -77,6 +93,8 @@ test("session methods use the public HTTP contract", async () => {
     ["POST", "http://localhost:3000/api/session/ses_test/compact"],
     ["POST", "http://localhost:3000/api/session/ses_test/wait"],
     ["GET", "http://localhost:3000/api/session/ses_test/context"],
+    ["GET", "http://localhost:3000/api/session/ses_test/history?limit=1&after=0"],
+    ["GET", "http://localhost:3000/api/session/ses_test/history?limit=2&after=1"],
     ["GET", "http://localhost:3000/api/session/ses_test/event?after=0"],
     ["POST", "http://localhost:3000/api/session/ses_test/interrupt"],
     ["GET", "http://localhost:3000/api/session/ses_test/message/msg_model"],
@@ -104,6 +122,24 @@ test("middleware errors remain declared client errors", async () => {
   }
 })
 
+test("sessions.history decodes SessionNotFoundError", async () => {
+  const client = OpenCode.make({
+    baseUrl: "http://localhost:3000",
+    fetch: async () =>
+      Response.json(
+        { _tag: "SessionNotFoundError", sessionID: "ses_missing", message: "Session not found" },
+        { status: 404 },
+      ),
+  })
+
+  try {
+    await client.sessions.history({ sessionID: "ses_missing" })
+    throw new Error("Expected request to fail")
+  } catch (error) {
+    expect(isSessionNotFoundError(error)).toBe(true)
+  }
+})
+
 const session = {
   data: {
     id: "ses_test",