From 16ddf5f559d8c52b23c6db7a046c3fda6a1d71f6 Mon Sep 17 00:00:00 2001
From: Kit Langton <kit.langton@gmail.com>
Date: Fri, 1 May 2026 07:57:03 -0400
Subject: [PATCH] fix(session): use finite archived timestamp schema (#25275)

---
 packages/opencode/src/session/session.ts             |  6 +++---
 packages/opencode/test/server/httpapi-bridge.test.ts | 12 ++++++++++++
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/packages/opencode/src/session/session.ts b/packages/opencode/src/session/session.ts
index 5593efc971..e1d0c527aa 100644
--- a/packages/opencode/src/session/session.ts
+++ b/packages/opencode/src/session/session.ts
@@ -142,9 +142,9 @@ const Share = Schema.Struct({
   url: Schema.String,
 })
 
-// Legacy HTTP accepted any number here, and persisted data may already contain
-// negative values. Keep archive timestamps permissive while other clocks stay non-negative.
-export const ArchivedTimestamp = Schema.Number
+// Legacy HTTP accepted negative values here. Keep archive timestamps permissive
+// while excluding non-finite values that cannot round-trip through JSON.
+export const ArchivedTimestamp = Schema.Finite
 
 const Time = Schema.Struct({
   created: NonNegativeInt,
diff --git a/packages/opencode/test/server/httpapi-bridge.test.ts b/packages/opencode/test/server/httpapi-bridge.test.ts
index 9343326738..a01b7330e2 100644
--- a/packages/opencode/test/server/httpapi-bridge.test.ts
+++ b/packages/opencode/test/server/httpapi-bridge.test.ts
@@ -258,6 +258,18 @@ describe("HttpApi server", () => {
     })
   })
 
+  test("matches SDK-affecting request schema details", () => {
+    const effect = effectOpenApi()
+    const sessionUpdate = effect.paths["/session/{sessionID}"]?.patch?.requestBody
+    const sessionUpdateSchema =
+      typeof sessionUpdate === "object" && sessionUpdate && "content" in sessionUpdate
+        ? sessionUpdate.content?.["application/json"]?.schema
+        : undefined
+    const sessionUpdateProperties = sessionUpdateSchema?.properties as Record<string, OpenApiSchema> | undefined
+    const time = sessionUpdateProperties?.time
+    expect(time?.properties?.archived).toEqual({ type: "number" })
+  })
+
   test("documents event routes as server-sent events", () => {
     const effect = effectOpenApi()