diff --git a/packages/opencode/src/cli/cmd/tui/attach.ts b/packages/opencode/src/cli/cmd/tui/attach.ts
index b908887c39f8..6757894c0c33 100644
--- a/packages/opencode/src/cli/cmd/tui/attach.ts
+++ b/packages/opencode/src/cli/cmd/tui/attach.ts
@@ -68,8 +68,9 @@ export const AttachCommand = cmd({
       const headers = ServerAuth.headers({ password: args.password, username: args.username })
       const config = await TuiConfig.get()
 
+      let resumed: { projectID: string } | undefined
       try {
-        await validateSession({
+        resumed = await validateSession({
           url: args.url,
           sessionID: args.session,
           directory,
@@ -90,6 +91,7 @@ export const AttachCommand = cmd({
         args: {
           continue: args.continue,
           sessionID: args.session,
+          sessionProjectID: resumed?.projectID,
           fork: args.fork,
         },
         directory,
diff --git a/packages/opencode/src/cli/cmd/tui/context/args.tsx b/packages/opencode/src/cli/cmd/tui/context/args.tsx
index 8a229ffaba69..9895b1cb3642 100644
--- a/packages/opencode/src/cli/cmd/tui/context/args.tsx
+++ b/packages/opencode/src/cli/cmd/tui/context/args.tsx
@@ -6,6 +6,7 @@ export interface Args {
   prompt?: string
   continue?: boolean
   sessionID?: string
+  sessionProjectID?: string
   fork?: boolean
 }
 
diff --git a/packages/opencode/src/cli/cmd/tui/context/event.ts b/packages/opencode/src/cli/cmd/tui/context/event.ts
index 5d814ecdcaab..fec4bd40acde 100644
--- a/packages/opencode/src/cli/cmd/tui/context/event.ts
+++ b/packages/opencode/src/cli/cmd/tui/context/event.ts
@@ -1,4 +1,5 @@
 import type { Event } from "@opencode-ai/sdk/v2"
+import { useArgs } from "./args"
 import { useProject } from "./project"
 import { useSDK } from "./sdk"
 
@@ -7,6 +8,7 @@ type EventMetadata = {
 }
 
 export function useEvent() {
+  const args = useArgs()
   const project = useProject()
   const sdk = useSDK()
 
@@ -16,7 +18,14 @@ export function useEvent() {
         return
       }
 
-      if (event.directory === "global" || event.project === project.project()) {
+      // A session resumed via `-s` from a different directory belongs to a
+      // different project than the launch cwd. Deliver its events too so the
+      // TUI live-renders without chdir-ing the process. See #28581.
+      if (
+        event.directory === "global" ||
+        event.project === project.project() ||
+        (args.sessionProjectID !== undefined && event.project === args.sessionProjectID)
+      ) {
         handler(event.payload, { workspace: event.workspace })
       }
     })
diff --git a/packages/opencode/src/cli/cmd/tui/thread.ts b/packages/opencode/src/cli/cmd/tui/thread.ts
index 382147d918f5..9ebe9379d809 100644
--- a/packages/opencode/src/cli/cmd/tui/thread.ts
+++ b/packages/opencode/src/cli/cmd/tui/thread.ts
@@ -210,8 +210,9 @@ export const TuiThreadCommand = cmd({
             events: createEventSource(client),
           }
 
+      let resumed: { projectID: string } | undefined
       try {
-        await validateSession({
+        resumed = await validateSession({
           url: transport.url,
           sessionID: args.session,
           directory: cwd,
@@ -245,6 +246,7 @@ export const TuiThreadCommand = cmd({
           args: {
             continue: args.continue,
             sessionID: args.session,
+            sessionProjectID: resumed?.projectID,
             agent: args.agent,
             model: args.model,
             prompt,
diff --git a/packages/opencode/src/cli/cmd/tui/validate-session.ts b/packages/opencode/src/cli/cmd/tui/validate-session.ts
index 31329a6533fe..de02f0e46187 100644
--- a/packages/opencode/src/cli/cmd/tui/validate-session.ts
+++ b/packages/opencode/src/cli/cmd/tui/validate-session.ts
@@ -10,7 +10,7 @@ export async function validateSession(input: {
   directory?: string
   fetch?: typeof fetch
   headers?: RequestInit["headers"]
-}) {
+}): Promise<{ projectID: string } | undefined> {
   if (!input.sessionID) return
 
   let sessionID: SessionID
@@ -20,10 +20,15 @@ export async function validateSession(input: {
     throw new Error(`Invalid session ID: ${error instanceof Error ? error.message : "unknown error"}`, { cause: error })
   }
 
-  await createOpencodeClient({
+  const session = await createOpencodeClient({
     baseUrl: input.url,
     directory: input.directory,
     fetch: input.fetch,
     headers: input.headers,
   }).session.get({ sessionID }, { throwOnError: true })
+  // The resumed session may belong to a different project than the launch
+  // directory (e.g. `opencode -s <id>` run from elsewhere). Returning its
+  // project lets the TUI event filter deliver the session's live events
+  // without chdir-ing the process. See #28581.
+  return session.data ? { projectID: session.data.projectID } : undefined
 }
diff --git a/packages/opencode/test/cli/tui/use-event.test.tsx b/packages/opencode/test/cli/tui/use-event.test.tsx
index 2aa3e978128c..1d02cdd2b388 100644
--- a/packages/opencode/test/cli/tui/use-event.test.tsx
+++ b/packages/opencode/test/cli/tui/use-event.test.tsx
@@ -6,6 +6,7 @@ import { onMount } from "solid-js"
 import { ProjectProvider, useProject } from "../../../src/cli/cmd/tui/context/project"
 import { SDKProvider } from "../../../src/cli/cmd/tui/context/sdk"
 import { useEvent } from "../../../src/cli/cmd/tui/context/event"
+import { ArgsProvider, type Args } from "../../../src/cli/cmd/tui/context/args"
 import { createEventSource, createFetch, directory } from "../../fixture/tui-sdk"
 
 const projectID = "proj_test"
@@ -47,7 +48,7 @@ function update(version: string): Event {
   }
 }
 
-async function mount() {
+async function mount(args: Args = {}) {
   const events = createEventSource()
   const calls = createFetch()
   const seen: Event[] = []
@@ -59,19 +60,21 @@ async function mount() {
   })
 
   const app = await testRender(() => (
-    <SDKProvider url="http://test" directory={directory} events={events.source} fetch={calls.fetch}>
-      <ProjectProvider>
-        <Probe
-          onReady={async (ctx) => {
-            project = ctx.project
-            await project.sync()
-            done()
-          }}
-          seen={seen}
-          workspaces={workspaces}
-        />
-      </ProjectProvider>
-    </SDKProvider>
+    <ArgsProvider {...args}>
+      <SDKProvider url="http://test" directory={directory} events={events.source} fetch={calls.fetch}>
+        <ProjectProvider>
+          <Probe
+            onReady={async (ctx) => {
+              project = ctx.project
+              await project.sync()
+              done()
+            }}
+            seen={seen}
+            workspaces={workspaces}
+          />
+        </ProjectProvider>
+      </SDKProvider>
+    </ArgsProvider>
   ))
 
   await ready
@@ -155,4 +158,33 @@ describe("useEvent", () => {
       app.renderer.destroy()
     }
   })
+
+  test("delivers events for a resumed session's project from another directory", async () => {
+    const { app, emit, seen } = await mount({ sessionProjectID: "proj_resumed" })
+
+    try {
+      // `opencode -s <id>` launched elsewhere: event project matches the
+      // resumed session, not the launch project.
+      emit(event(vcs("resumed"), { directory: "/tmp/other", project: "proj_resumed" }))
+
+      await wait(() => seen.length === 1)
+
+      expect(seen).toEqual([vcs("resumed")])
+    } finally {
+      app.renderer.destroy()
+    }
+  })
+
+  test("still ignores unrelated projects when a session is resumed", async () => {
+    const { app, emit, seen } = await mount({ sessionProjectID: "proj_resumed" })
+
+    try {
+      emit(event(vcs("other"), { directory: "/tmp/other", project: "proj_unrelated" }))
+      await Bun.sleep(30)
+
+      expect(seen).toHaveLength(0)
+    } finally {
+      app.renderer.destroy()
+    }
+  })
 })