diff --git a/packages/opencode/src/cli/cmd/run.ts b/packages/opencode/src/cli/cmd/run.ts
index 3927f615a080..36e2dd6ee659 100644
--- a/packages/opencode/src/cli/cmd/run.ts
+++ b/packages/opencode/src/cli/cmd/run.ts
@@ -696,8 +696,25 @@ export const RunCommand = effectCmd({
         // created, and replies issued from inside the loop must use that client.
         async function loop(client: OpencodeClient, events: Awaited<ReturnType<typeof sdk.event.subscribe>>) {
           const toggles = new Map<string, boolean>()
+          const sessions = new Set([sessionID])
           let error: string | undefined
 
+          async function belongsToSessionTree(candidate: string) {
+            const path: string[] = []
+            const seen = new Set<string>()
+            let current = candidate
+            while (!sessions.has(current)) {
+              if (seen.has(current)) return false
+              seen.add(current)
+              path.push(current)
+              const result = await client.session.get({ sessionID: current }).catch(() => undefined)
+              if (!result?.data?.parentID) return false
+              current = result.data.parentID
+            }
+            path.forEach((id) => sessions.add(id))
+            return true
+          }
+
           for await (const event of events.stream) {
             if (
               event.type === "message.updated" &&
@@ -795,7 +812,7 @@ export const RunCommand = effectCmd({
 
             if (event.type === "permission.asked") {
               const permission = event.properties
-              if (permission.sessionID !== sessionID) continue
+              if (!(await belongsToSessionTree(permission.sessionID))) continue
 
               if (auto) {
                 await client.permission.reply({
diff --git a/packages/opencode/test/cli/run/run-process.test.ts b/packages/opencode/test/cli/run/run-process.test.ts
index bd5847e2723c..ed3e0bc66e7a 100644
--- a/packages/opencode/test/cli/run/run-process.test.ts
+++ b/packages/opencode/test/cli/run/run-process.test.ts
@@ -4,9 +4,11 @@
 // `opencode.run(message, opts?)` to spawn `bun src/index.ts run ...` with
 // `OPENCODE_CONFIG_CONTENT` providing the test provider config inline.
 import { describe, expect } from "bun:test"
+import { createOpencodeClient } from "@opencode-ai/sdk/v2"
 import { Effect } from "effect"
 import { reply } from "../../lib/llm-server"
 import { cliIt } from "../../lib/cli-process"
+import { pollWithTimeout } from "../../lib/effect"
 
 describe("opencode run (non-interactive subprocess)", () => {
   // Happy path: prompt completes, output reaches stdout, process exits 0.
@@ -277,6 +279,112 @@ describe("opencode run (non-interactive subprocess)", () => {
     60_000,
   )
 
+  // Regression for #41730: --auto permissions must cascade to subagents.
+  // Without the fix, the child session's permission.asked event is filtered
+  // out by the session-ID check and the process hangs forever.
+  cliIt.live(
+    "--auto approves permissions requested by subagent sessions",
+    ({ llm, opencode }) =>
+      Effect.gen(function* () {
+        yield* llm.push(
+          reply().tool("task", {
+            description: "Run echo command",
+            prompt: "Run the bash command: echo hello",
+            subagent_type: "general",
+          }),
+        )
+        yield* llm.push(reply().tool("bash", { command: "echo hello", description: "Print hello" }))
+        yield* llm.text("subagent finished")
+        yield* llm.text("parent done")
+
+        const result = yield* opencode.run("spawn a subagent to run bash", {
+          permission: { bash: "ask" },
+          extraArgs: ["--dangerously-skip-permissions"],
+        })
+
+        opencode.expectExit(result, 0)
+        expect(result.stdout).toContain("parent done")
+      }),
+    60_000,
+  )
+
+  // Without --auto, subagent permissions should be auto-rejected (not hung).
+  cliIt.live(
+    "subagent permissions are auto-rejected without --auto",
+    ({ llm, opencode }) =>
+      Effect.gen(function* () {
+        yield* llm.push(
+          reply().tool("task", {
+            description: "Run echo command",
+            prompt: "Run the bash command: echo hello",
+            subagent_type: "general",
+          }),
+        )
+        yield* llm.push(reply().tool("bash", { command: "echo hello", description: "Print hello" }))
+        yield* llm.text("subagent finished")
+        yield* llm.text("parent done")
+
+        const result = yield* opencode.run("spawn a subagent to run bash", {
+          permission: { bash: "ask" },
+        })
+
+        opencode.expectExit(result, 0)
+        expect(result.stderr).toContain("auto-rejecting")
+      }),
+    60_000,
+  )
+
+  cliIt.live(
+    "--auto leaves permission requests from unrelated sessions pending",
+    ({ home, llm, opencode }) =>
+      Effect.gen(function* () {
+        const gate = Promise.withResolvers<void>()
+        yield* llm.push(
+          reply().wait(gate.promise).tool("bash", { command: "echo root", description: "Continue the root session" }),
+        )
+        yield* llm.push(reply().tool("bash", { command: "echo unrelated", description: "Wait for unrelated approval" }))
+        yield* llm.text("root done")
+
+        const server = yield* opencode.serve()
+        const sdk = createOpencodeClient({ baseUrl: server.url, directory: home })
+        const permission = [{ permission: "bash", pattern: "*", action: "ask" as const }]
+        const root = yield* Effect.promise(() => sdk.session.create({ title: "root", permission }))
+        const unrelated = yield* Effect.promise(() => sdk.session.create({ title: "unrelated", permission }))
+        expect(root.data?.id).toBeDefined()
+        expect(unrelated.data?.id).toBeDefined()
+
+        const run = yield* opencode.startRun("run the root tool", {
+          extraArgs: ["--attach", server.url, "--session", root.data!.id, "--dangerously-skip-permissions"],
+        })
+        yield* llm.wait(1)
+
+        yield* Effect.promise(() =>
+          sdk.session.promptAsync({
+            sessionID: unrelated.data!.id,
+            model: { providerID: "test", modelID: "test-model" },
+            agent: "build",
+            parts: [{ type: "text", text: "run the unrelated tool" }],
+          }),
+        )
+
+        const pending = yield* pollWithTimeout(
+          Effect.promise(async () =>
+            (await sdk.permission.list()).data?.find((item) => item.sessionID === unrelated.data!.id),
+          ),
+          "unrelated session did not request permission",
+        )
+
+        gate.resolve()
+        yield* llm.wait(3)
+
+        const remaining = yield* Effect.promise(() => sdk.permission.list())
+        expect(remaining.data?.some((item) => item.id === pending.id)).toBe(true)
+        const result = yield* run.result
+        opencode.expectExit(result, 0)
+      }),
+    60_000,
+  )
+
   cliIt.live(
     "attach mode sends client-local file contents without a shared path",
     ({ home, llm, opencode }) =>