diff --git a/packages/opencode/src/session/session.ts b/packages/opencode/src/session/session.ts
index e167908e83..673347b206 100644
--- a/packages/opencode/src/session/session.ts
+++ b/packages/opencode/src/session/session.ts
@@ -37,7 +37,7 @@ import { Permission } from "@/permission"
 import { Global } from "@opencode-ai/core/global"
 import { Effect, Layer, Option, Context, Schema, Types } from "effect"
 import { zod } from "@/util/effect-zod"
-import { withStatics } from "@/util/schema"
+import { optionalOmitUndefined, withStatics } from "@/util/schema"
 
 const log = Log.create({ service: "session" })
 
@@ -128,7 +128,7 @@ const Summary = Schema.Struct({
   additions: Schema.Number,
   deletions: Schema.Number,
   files: Schema.Number,
-  diffs: Schema.optional(Schema.Array(Snapshot.FileDiff)),
+  diffs: optionalOmitUndefined(Schema.Array(Snapshot.FileDiff)),
 })
 
 const Share = Schema.Struct({
@@ -138,31 +138,31 @@ const Share = Schema.Struct({
 const Time = Schema.Struct({
   created: Schema.Number,
   updated: Schema.Number,
-  compacting: Schema.optional(Schema.Number),
-  archived: Schema.optional(Schema.Number),
+  compacting: optionalOmitUndefined(Schema.Number),
+  archived: optionalOmitUndefined(Schema.Number),
 })
 
 const Revert = Schema.Struct({
   messageID: MessageID,
-  partID: Schema.optional(PartID),
-  snapshot: Schema.optional(Schema.String),
-  diff: Schema.optional(Schema.String),
+  partID: optionalOmitUndefined(PartID),
+  snapshot: optionalOmitUndefined(Schema.String),
+  diff: optionalOmitUndefined(Schema.String),
 })
 
 export const Info = Schema.Struct({
   id: SessionID,
   slug: Schema.String,
   projectID: ProjectID,
-  workspaceID: Schema.optional(WorkspaceID),
+  workspaceID: optionalOmitUndefined(WorkspaceID),
   directory: Schema.String,
-  parentID: Schema.optional(SessionID),
-  summary: Schema.optional(Summary),
-  share: Schema.optional(Share),
+  parentID: optionalOmitUndefined(SessionID),
+  summary: optionalOmitUndefined(Summary),
+  share: optionalOmitUndefined(Share),
   title: Schema.String,
   version: Schema.String,
   time: Time,
-  permission: Schema.optional(Permission.Ruleset),
-  revert: Schema.optional(Revert),
+  permission: optionalOmitUndefined(Permission.Ruleset),
+  revert: optionalOmitUndefined(Revert),
 })
   .annotate({ identifier: "Session" })
   .pipe(withStatics((s) => ({ zod: zod(s) })))
@@ -170,7 +170,7 @@ export type Info = Types.DeepMutable<Schema.Schema.Type<typeof Info>>
 
 export const ProjectInfo = Schema.Struct({
   id: ProjectID,
-  name: Schema.optional(Schema.String),
+  name: optionalOmitUndefined(Schema.String),
   worktree: Schema.String,
 })
   .annotate({ identifier: "ProjectSummary" })
diff --git a/packages/opencode/src/util/schema.ts b/packages/opencode/src/util/schema.ts
index 0c50482bbd..1daab260fb 100644
--- a/packages/opencode/src/util/schema.ts
+++ b/packages/opencode/src/util/schema.ts
@@ -1,4 +1,5 @@
-import { Schema } from "effect"
+import { Option, Schema, SchemaGetter } from "effect"
+import { zod, ZodOverride } from "./effect-zod"
 
 /**
  * Integer greater than zero.
@@ -10,6 +11,19 @@ export const PositiveInt = Schema.Int.check(Schema.isGreaterThan(0))
  */
 export const NonNegativeInt = Schema.Int.check(Schema.isGreaterThanOrEqualTo(0))
 
+/**
+ * Optional public JSON field that accepts explicit `undefined` internally but
+ * encodes it as an omitted key, matching `JSON.stringify` legacy responses.
+ */
+export const optionalOmitUndefined = <S extends Schema.Top>(schema: S) =>
+  Schema.optionalKey(schema).pipe(
+    Schema.decodeTo(Schema.optional(schema), {
+      decode: SchemaGetter.passthrough({ strict: false }),
+      encode: SchemaGetter.transformOptional(Option.filter((value) => value !== undefined)),
+    }),
+    Schema.annotate({ [ZodOverride]: zod(schema).optional() }),
+  )
+
 /**
  * Strip `readonly` from a nested type. Stand-in for `effect`'s `Types.DeepMutable`
  * until `effect:core/x228my` ("Types.DeepMutable widens unknown to `{}`") lands.
diff --git a/packages/opencode/test/server/httpapi-session.test.ts b/packages/opencode/test/server/httpapi-session.test.ts
index 264e660221..aa7e33a034 100644
--- a/packages/opencode/test/server/httpapi-session.test.ts
+++ b/packages/opencode/test/server/httpapi-session.test.ts
@@ -1,4 +1,4 @@
-import { afterEach, describe, expect, test } from "bun:test"
+import { afterEach, describe, expect } from "bun:test"
 import type { UpgradeWebSocket } from "hono/ws"
 import { Effect } from "effect"
 import { Flag } from "@opencode-ai/core/flag/flag"
@@ -13,6 +13,7 @@ import { MessageV2 } from "../../src/session/message-v2"
 import * as Log from "@opencode-ai/core/util/log"
 import { resetDatabase } from "../fixture/db"
 import { tmpdir } from "../fixture/fixture"
+import { it } from "../lib/effect"
 
 void Log.init({ print: false })
 
@@ -32,44 +33,70 @@ function pathFor(path: string, params: Record<string, string>) {
   return Object.entries(params).reduce((result, [key, value]) => result.replace(`:${key}`, value), path)
 }
 
-async function createSession(directory: string, input?: Session.CreateInput) {
-  return Instance.provide({
-    directory,
-    fn: async () => runSession(Session.Service.use((svc) => svc.create(input))),
+function createSession(directory: string, input?: Session.CreateInput) {
+  return Effect.promise(
+    async () =>
+      await Instance.provide({
+        directory,
+        fn: () => runSession(Session.Service.use((svc) => svc.create(input))),
+      }),
+  )
+}
+
+function createTextMessage(directory: string, sessionID: SessionID, text: string) {
+  return Effect.promise(
+    async () =>
+      await Instance.provide({
+        directory,
+        fn: () =>
+          runSession(
+            Effect.gen(function* () {
+              const svc = yield* Session.Service
+              const info = yield* svc.updateMessage({
+                id: MessageID.ascending(),
+                role: "user",
+                sessionID,
+                agent: "build",
+                model: { providerID: ProviderID.make("test"), modelID: ModelID.make("test") },
+                time: { created: Date.now() },
+              })
+              const part = yield* svc.updatePart({
+                id: PartID.ascending(),
+                sessionID,
+                messageID: info.id,
+                type: "text",
+                text,
+              })
+              return { info, part }
+            }),
+          ),
+      }),
+  )
+}
+
+function request(path: string, init?: RequestInit) {
+  return Effect.promise(async () => app().request(path, init))
+}
+
+function json<T>(response: Response) {
+  return Effect.promise(async () => {
+    if (response.status !== 200) throw new Error(await response.text())
+    return (await response.json()) as T
   })
 }
 
-async function createTextMessage(directory: string, sessionID: SessionID, text: string) {
-  return Instance.provide({
-    directory,
-    fn: async () =>
-      runSession(
-        Effect.gen(function* () {
-          const svc = yield* Session.Service
-          const info = yield* svc.updateMessage({
-            id: MessageID.ascending(),
-            role: "user",
-            sessionID,
-            agent: "build",
-            model: { providerID: ProviderID.make("test"), modelID: ModelID.make("test") },
-            time: { created: Date.now() },
-          })
-          const part = yield* svc.updatePart({
-            id: PartID.ascending(),
-            sessionID,
-            messageID: info.id,
-            type: "text",
-            text,
-          })
-          return { info, part }
-        }),
-      ),
-  })
+function requestJson<T>(path: string, init?: RequestInit) {
+  return request(path, init).pipe(Effect.flatMap(json<T>))
 }
 
-async function json<T>(response: Response) {
-  if (response.status !== 200) throw new Error(await response.text())
-  return (await response.json()) as T
+function withTmp<A, E, R>(
+  options: Parameters<typeof tmpdir>[0],
+  fn: (tmp: Awaited<ReturnType<typeof tmpdir>>) => Effect.Effect<A, E, R>,
+) {
+  return Effect.acquireRelease(
+    Effect.promise(() => tmpdir(options)),
+    (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
+  ).pipe(Effect.flatMap(fn))
 }
 
 afterEach(async () => {
@@ -79,210 +106,199 @@ afterEach(async () => {
 })
 
 describe("session HttpApi", () => {
-  test("serves read routes through Hono bridge", async () => {
-    await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false } })
-    const headers = { "x-opencode-directory": tmp.path }
-    const parent = await createSession(tmp.path, { title: "parent" })
-    const child = await createSession(tmp.path, { title: "child", parentID: parent.id })
-    const message = await createTextMessage(tmp.path, parent.id, "hello")
-    await createTextMessage(tmp.path, parent.id, "world")
+  it.live(
+    "serves read routes through Hono bridge",
+    withTmp({ git: true, config: { formatter: false, lsp: false } }, (tmp) =>
+      Effect.gen(function* () {
+        const headers = { "x-opencode-directory": tmp.path }
+        const parent = yield* createSession(tmp.path, { title: "parent" })
+        const child = yield* createSession(tmp.path, { title: "child", parentID: parent.id })
+        const message = yield* createTextMessage(tmp.path, parent.id, "hello")
+        yield* createTextMessage(tmp.path, parent.id, "world")
 
-    expect(
-      (await json<Session.Info[]>(await app().request(`${SessionPaths.list}?roots=true`, { headers }))).map(
-        (item) => item.id,
-      ),
-    ).toContain(parent.id)
+        const listed = yield* requestJson<Session.Info[]>(`${SessionPaths.list}?roots=true`, { headers })
+        expect(listed.map((item) => item.id)).toContain(parent.id)
+        expect(Object.hasOwn(listed[0]!, "parentID")).toBe(false)
 
-    expect(await json<Record<string, unknown>>(await app().request(SessionPaths.status, { headers }))).toEqual({})
+        expect(yield* requestJson<Record<string, unknown>>(SessionPaths.status, { headers })).toEqual({})
 
-    expect(
-      await json<Session.Info>(await app().request(pathFor(SessionPaths.get, { sessionID: parent.id }), { headers })),
-    ).toMatchObject({ id: parent.id, title: "parent" })
+        expect(
+          yield* requestJson<Session.Info>(pathFor(SessionPaths.get, { sessionID: parent.id }), { headers }),
+        ).toMatchObject({ id: parent.id, title: "parent" })
 
-    expect(
-      (
-        await json<Session.Info[]>(
-          await app().request(pathFor(SessionPaths.children, { sessionID: parent.id }), { headers }),
-        )
-      ).map((item) => item.id),
-    ).toEqual([child.id])
+        expect(
+          (yield* requestJson<Session.Info[]>(pathFor(SessionPaths.children, { sessionID: parent.id }), {
+            headers,
+          })).map((item) => item.id),
+        ).toEqual([child.id])
 
-    expect(
-      await json<unknown[]>(await app().request(pathFor(SessionPaths.todo, { sessionID: parent.id }), { headers })),
-    ).toEqual([])
+        expect(
+          yield* requestJson<unknown[]>(pathFor(SessionPaths.todo, { sessionID: parent.id }), { headers }),
+        ).toEqual([])
 
-    expect(
-      await json<unknown[]>(await app().request(pathFor(SessionPaths.diff, { sessionID: parent.id }), { headers })),
-    ).toEqual([])
+        expect(
+          yield* requestJson<unknown[]>(pathFor(SessionPaths.diff, { sessionID: parent.id }), { headers }),
+        ).toEqual([])
 
-    const messages = await app().request(`${pathFor(SessionPaths.messages, { sessionID: parent.id })}?limit=1`, {
-      headers,
-    })
-    const messagePage = await json<MessageV2.WithParts[]>(messages)
-    const nextCursor = messages.headers.get("x-next-cursor")
-    expect(nextCursor).toBeTruthy()
-    expect(messagePage[0]?.parts[0]).toMatchObject({ type: "text" })
-
-    expect(
-      (
-        await app().request(`${pathFor(SessionPaths.messages, { sessionID: parent.id })}?before=${nextCursor}`, {
+        const messages = yield* request(`${pathFor(SessionPaths.messages, { sessionID: parent.id })}?limit=1`, {
           headers,
         })
-      ).status,
-    ).toBe(400)
-    expect(
-      (
-        await app().request(`${pathFor(SessionPaths.messages, { sessionID: parent.id })}?limit=1&before=invalid`, {
+        const messagePage = yield* json<MessageV2.WithParts[]>(messages)
+        const nextCursor = messages.headers.get("x-next-cursor")
+        expect(nextCursor).toBeTruthy()
+        expect(messagePage[0]?.parts[0]).toMatchObject({ type: "text" })
+
+        expect(
+          (yield* request(`${pathFor(SessionPaths.messages, { sessionID: parent.id })}?before=${nextCursor}`, {
+            headers,
+          })).status,
+        ).toBe(400)
+        expect(
+          (yield* request(`${pathFor(SessionPaths.messages, { sessionID: parent.id })}?limit=1&before=invalid`, {
+            headers,
+          })).status,
+        ).toBe(400)
+
+        expect(
+          yield* requestJson<MessageV2.WithParts>(
+            pathFor(SessionPaths.message, { sessionID: parent.id, messageID: message.info.id }),
+            { headers },
+          ),
+        ).toMatchObject({ info: { id: message.info.id } })
+      }),
+    ),
+  )
+
+  it.live(
+    "serves lifecycle mutation routes through Hono bridge",
+    withTmp({ git: true, config: { formatter: false, lsp: false, share: "disabled" } }, (tmp) =>
+      Effect.gen(function* () {
+        const headers = { "x-opencode-directory": tmp.path, "content-type": "application/json" }
+
+        const createdEmpty = yield* requestJson<Session.Info>(SessionPaths.create, {
+          method: "POST",
           headers,
         })
-      ).status,
-    ).toBe(400)
+        expect(createdEmpty.id).toBeTruthy()
 
-    expect(
-      await json<MessageV2.WithParts>(
-        await app().request(pathFor(SessionPaths.message, { sessionID: parent.id, messageID: message.info.id }), {
+        const created = yield* requestJson<Session.Info>(SessionPaths.create, {
+          method: "POST",
           headers,
-        }),
-      ),
-    ).toMatchObject({ info: { id: message.info.id } })
-  })
+          body: JSON.stringify({ title: "created" }),
+        })
+        expect(created.title).toBe("created")
 
-  test("serves lifecycle mutation routes through Hono bridge", async () => {
-    await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false, share: "disabled" } })
-    const headers = { "x-opencode-directory": tmp.path, "content-type": "application/json" }
-
-    const createdEmpty = await json<Session.Info>(
-      await app().request(SessionPaths.create, {
-        method: "POST",
-        headers,
-      }),
-    )
-    expect(createdEmpty.id).toBeTruthy()
-
-    const created = await json<Session.Info>(
-      await app().request(SessionPaths.create, {
-        method: "POST",
-        headers,
-        body: JSON.stringify({ title: "created" }),
-      }),
-    )
-    expect(created.title).toBe("created")
-
-    const updated = await json<Session.Info>(
-      await app().request(pathFor(SessionPaths.update, { sessionID: created.id }), {
-        method: "PATCH",
-        headers,
-        body: JSON.stringify({ title: "updated", time: { archived: 1 } }),
-      }),
-    )
-    expect(updated).toMatchObject({ id: created.id, title: "updated", time: { archived: 1 } })
-
-    const forked = await json<Session.Info>(
-      await app().request(pathFor(SessionPaths.fork, { sessionID: created.id }), {
-        method: "POST",
-        headers,
-        body: JSON.stringify({}),
-      }),
-    )
-    expect(forked.id).not.toBe(created.id)
-
-    expect(
-      await json<boolean>(
-        await app().request(pathFor(SessionPaths.abort, { sessionID: created.id }), { method: "POST", headers }),
-      ),
-    ).toBe(true)
-
-    expect(
-      await json<boolean>(
-        await app().request(pathFor(SessionPaths.remove, { sessionID: created.id }), { method: "DELETE", headers }),
-      ),
-    ).toBe(true)
-  })
-
-  test("serves message mutation routes through Hono bridge", async () => {
-    await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false } })
-    const headers = { "x-opencode-directory": tmp.path, "content-type": "application/json" }
-    const session = await createSession(tmp.path, { title: "messages" })
-    const first = await createTextMessage(tmp.path, session.id, "first")
-    const second = await createTextMessage(tmp.path, session.id, "second")
-
-    const updated = await json<MessageV2.Part>(
-      await app().request(
-        pathFor(SessionPaths.updatePart, {
-          sessionID: session.id,
-          messageID: first.info.id,
-          partID: first.part.id,
-        }),
-        {
+        const updated = yield* requestJson<Session.Info>(pathFor(SessionPaths.update, { sessionID: created.id }), {
           method: "PATCH",
           headers,
-          body: JSON.stringify({ ...first.part, text: "updated" }),
-        },
-      ),
-    )
-    expect(updated).toMatchObject({ id: first.part.id, type: "text", text: "updated" })
+          body: JSON.stringify({ title: "updated", time: { archived: 1 } }),
+        })
+        expect(updated).toMatchObject({ id: created.id, title: "updated", time: { archived: 1 } })
 
-    expect(
-      await json<boolean>(
-        await app().request(
-          pathFor(SessionPaths.deletePart, {
+        const forked = yield* requestJson<Session.Info>(pathFor(SessionPaths.fork, { sessionID: created.id }), {
+          method: "POST",
+          headers,
+          body: JSON.stringify({}),
+        })
+        expect(forked.id).not.toBe(created.id)
+
+        expect(
+          yield* requestJson<boolean>(pathFor(SessionPaths.abort, { sessionID: created.id }), {
+            method: "POST",
+            headers,
+          }),
+        ).toBe(true)
+
+        expect(
+          yield* requestJson<boolean>(pathFor(SessionPaths.remove, { sessionID: created.id }), {
+            method: "DELETE",
+            headers,
+          }),
+        ).toBe(true)
+      }),
+    ),
+  )
+
+  it.live(
+    "serves message mutation routes through Hono bridge",
+    withTmp({ git: true, config: { formatter: false, lsp: false } }, (tmp) =>
+      Effect.gen(function* () {
+        const headers = { "x-opencode-directory": tmp.path, "content-type": "application/json" }
+        const session = yield* createSession(tmp.path, { title: "messages" })
+        const first = yield* createTextMessage(tmp.path, session.id, "first")
+        const second = yield* createTextMessage(tmp.path, session.id, "second")
+
+        const updated = yield* requestJson<MessageV2.Part>(
+          pathFor(SessionPaths.updatePart, {
             sessionID: session.id,
             messageID: first.info.id,
             partID: first.part.id,
           }),
-          { method: "DELETE", headers },
-        ),
-      ),
-    ).toBe(true)
-
-    expect(
-      await json<boolean>(
-        await app().request(pathFor(SessionPaths.deleteMessage, { sessionID: session.id, messageID: second.info.id }), {
-          method: "DELETE",
-          headers,
-        }),
-      ),
-    ).toBe(true)
-  })
-
-  test("serves remaining non-LLM session mutation routes through Hono bridge", async () => {
-    await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false } })
-    const headers = { "x-opencode-directory": tmp.path, "content-type": "application/json" }
-    const session = await createSession(tmp.path, { title: "remaining" })
-
-    expect(
-      await json<Session.Info>(
-        await app().request(pathFor(SessionPaths.revert, { sessionID: session.id }), {
-          method: "POST",
-          headers,
-          body: JSON.stringify({ messageID: MessageID.ascending() }),
-        }),
-      ),
-    ).toMatchObject({ id: session.id })
-
-    expect(
-      await json<Session.Info>(
-        await app().request(pathFor(SessionPaths.unrevert, { sessionID: session.id }), {
-          method: "POST",
-          headers,
-        }),
-      ),
-    ).toMatchObject({ id: session.id })
-
-    expect(
-      await json<boolean>(
-        await app().request(
-          pathFor(SessionPaths.permissions, {
-            sessionID: session.id,
-            permissionID: String(PermissionID.ascending()),
-          }),
           {
+            method: "PATCH",
+            headers,
+            body: JSON.stringify({ ...first.part, text: "updated" }),
+          },
+        )
+        expect(updated).toMatchObject({ id: first.part.id, type: "text", text: "updated" })
+
+        expect(
+          yield* requestJson<boolean>(
+            pathFor(SessionPaths.deletePart, {
+              sessionID: session.id,
+              messageID: first.info.id,
+              partID: first.part.id,
+            }),
+            { method: "DELETE", headers },
+          ),
+        ).toBe(true)
+
+        expect(
+          yield* requestJson<boolean>(
+            pathFor(SessionPaths.deleteMessage, { sessionID: session.id, messageID: second.info.id }),
+            { method: "DELETE", headers },
+          ),
+        ).toBe(true)
+      }),
+    ),
+  )
+
+  it.live(
+    "serves remaining non-LLM session mutation routes through Hono bridge",
+    withTmp({ git: true, config: { formatter: false, lsp: false } }, (tmp) =>
+      Effect.gen(function* () {
+        const headers = { "x-opencode-directory": tmp.path, "content-type": "application/json" }
+        const session = yield* createSession(tmp.path, { title: "remaining" })
+
+        expect(
+          yield* requestJson<Session.Info>(pathFor(SessionPaths.revert, { sessionID: session.id }), {
             method: "POST",
             headers,
-            body: JSON.stringify({ response: "once" }),
-          },
-        ),
-      ),
-    ).toBe(true)
-  })
+            body: JSON.stringify({ messageID: MessageID.ascending() }),
+          }),
+        ).toMatchObject({ id: session.id })
+
+        expect(
+          yield* requestJson<Session.Info>(pathFor(SessionPaths.unrevert, { sessionID: session.id }), {
+            method: "POST",
+            headers,
+          }),
+        ).toMatchObject({ id: session.id })
+
+        expect(
+          yield* requestJson<boolean>(
+            pathFor(SessionPaths.permissions, {
+              sessionID: session.id,
+              permissionID: String(PermissionID.ascending()),
+            }),
+            {
+              method: "POST",
+              headers,
+              body: JSON.stringify({ response: "once" }),
+            },
+          ),
+        ).toBe(true)
+      }),
+    ),
+  )
 })
diff --git a/packages/opencode/test/session/session-schema.test.ts b/packages/opencode/test/session/session-schema.test.ts
new file mode 100644
index 0000000000..cefe6e73af
--- /dev/null
+++ b/packages/opencode/test/session/session-schema.test.ts
@@ -0,0 +1,53 @@
+import { describe, expect, test } from "bun:test"
+import { Schema } from "effect"
+import { ProjectID } from "../../src/project/schema"
+import { SessionID } from "../../src/session/schema"
+import { Session } from "../../src/session/session"
+
+const info = {
+  id: SessionID.descending(),
+  slug: "test-session",
+  projectID: ProjectID.global,
+  workspaceID: undefined,
+  directory: "/tmp/opencode",
+  parentID: undefined,
+  summary: undefined,
+  share: undefined,
+  title: "Test session",
+  version: "1.0.0",
+  time: {
+    created: 1,
+    updated: 2,
+    compacting: undefined,
+    archived: undefined,
+  },
+  permission: undefined,
+  revert: undefined,
+} satisfies Session.Info
+
+describe("Session schema", () => {
+  test("encodes undefined optional session fields as omitted keys", () => {
+    const encoded = Schema.encodeUnknownSync(Session.Info)(info) as Record<string, unknown>
+
+    for (const key of ["workspaceID", "parentID", "summary", "share", "permission", "revert"]) {
+      expect(Object.hasOwn(encoded, key)).toBe(false)
+    }
+    expect(Object.hasOwn(encoded.time as Record<string, unknown>, "compacting")).toBe(false)
+    expect(Object.hasOwn(encoded.time as Record<string, unknown>, "archived")).toBe(false)
+    expect(JSON.stringify(encoded)).not.toContain("parentID")
+  })
+
+  test("encodes undefined optional global session project fields as omitted keys", () => {
+    const encoded = Schema.encodeUnknownSync(Session.GlobalInfo)({
+      ...info,
+      project: {
+        id: ProjectID.global,
+        name: undefined,
+        worktree: "/tmp/opencode",
+      },
+    }) as Record<string, unknown>
+
+    expect(Object.hasOwn(encoded, "parentID")).toBe(false)
+    expect(Object.hasOwn(encoded.project as Record<string, unknown>, "name")).toBe(false)
+  })
+})