feat(v2): add permission mode passthrough and fix agent stop-on-close

- Add permission_mode field to AgentQueryOptions (Rust, sidecar, bridge)
  flowing from controller through sidecar to SDK; defaults to
  bypassPermissions, supports default mode
- Fix AgentPane onDestroy bug: remove stopAgent() from onDestroy (fires
  on layout remounts), move stop-on-close to TilingGrid onClose handler
- Bundle SDK into sidecar via esbuild (remove --external flag)

v2/bterminal-core/src/sidecar.rs

@@ -18,6 +18,7 @@ pub struct AgentQueryOptions {
     pub max_turns: Option<u32>,
     pub max_budget_usd: Option<f64>,
     pub resume_session_id: Option<String>,
+    pub permission_mode: Option<String>,
 }
 
 /// Directories to search for sidecar scripts.
@@ -168,6 +169,7 @@ impl SidecarManager {
             "maxTurns": options.max_turns,
             "maxBudgetUsd": options.max_budget_usd,
             "resumeSessionId": options.resume_session_id,
+            "permissionMode": options.permission_mode,
         });
 
         self.send_message(&msg)

v2/package.json

@@ -12,7 +12,7 @@
     "tauri:dev": "cargo tauri dev",
     "tauri:build": "cargo tauri build",
     "test": "vitest run",
-    "build:sidecar": "esbuild sidecar/agent-runner.ts --bundle --platform=node --format=esm --outfile=sidecar/dist/agent-runner.mjs --external:@anthropic-ai/claude-agent-sdk"
+    "build:sidecar": "esbuild sidecar/agent-runner.ts --bundle --platform=node --format=esm --outfile=sidecar/dist/agent-runner.mjs"
   },
   "devDependencies": {
     "@sveltejs/vite-plugin-svelte": "^6.2.1",

v2/sidecar/agent-runner-deno.ts

@@ -27,6 +27,7 @@ interface QueryMessage {
   maxTurns?: number;
   maxBudgetUsd?: number;
   resumeSessionId?: string;
+  permissionMode?: string;
 }
 
 interface StopMessage {
@@ -51,7 +52,7 @@ function handleMessage(msg: Record<string, unknown>) {
 }
 
 async function handleQuery(msg: QueryMessage) {
-  const { sessionId, prompt, cwd, maxTurns, maxBudgetUsd, resumeSessionId } = msg;
+  const { sessionId, prompt, cwd, maxTurns, maxBudgetUsd, resumeSessionId, permissionMode } = msg;
 
   if (sessions.has(sessionId)) {
     send({ type: "error", sessionId, message: "Session already running" });
@@ -84,8 +85,8 @@ async function handleQuery(msg: QueryMessage) {
           "Bash", "Read", "Write", "Edit", "Glob", "Grep",
           "WebSearch", "WebFetch", "TodoWrite", "NotebookEdit",
         ],
-        permissionMode: "bypassPermissions",
-        allowDangerouslySkipPermissions: true,
+        permissionMode: (permissionMode ?? "bypassPermissions") as "bypassPermissions" | "default",
+        allowDangerouslySkipPermissions: (permissionMode ?? "bypassPermissions") === "bypassPermissions",
       },
     });
 

v2/sidecar/agent-runner.ts

@@ -36,6 +36,7 @@ interface QueryMessage {
   maxTurns?: number;
   maxBudgetUsd?: number;
   resumeSessionId?: string;
+  permissionMode?: string;
 }
 
 interface StopMessage {
@@ -60,7 +61,7 @@ function handleMessage(msg: Record<string, unknown>) {
 }
 
 async function handleQuery(msg: QueryMessage) {
-  const { sessionId, prompt, cwd, maxTurns, maxBudgetUsd, resumeSessionId } = msg;
+  const { sessionId, prompt, cwd, maxTurns, maxBudgetUsd, resumeSessionId, permissionMode } = msg;
 
   if (sessions.has(sessionId)) {
     send({ type: 'error', sessionId, message: 'Session already running' });
@@ -93,8 +94,8 @@ async function handleQuery(msg: QueryMessage) {
           'Bash', 'Read', 'Write', 'Edit', 'Glob', 'Grep',
           'WebSearch', 'WebFetch', 'TodoWrite', 'NotebookEdit',
         ],
-        permissionMode: 'bypassPermissions',
-        allowDangerouslySkipPermissions: true,
+        permissionMode: (permissionMode ?? 'bypassPermissions') as 'bypassPermissions' | 'default',
+        allowDangerouslySkipPermissions: (permissionMode ?? 'bypassPermissions') === 'bypassPermissions',
       },
     });
 

v2/src/lib/adapters/agent-bridge.ts

@@ -11,6 +11,7 @@ export interface AgentQueryOptions {
   max_turns?: number;
   max_budget_usd?: number;
   resume_session_id?: string;
+  permission_mode?: string;
   remote_machine_id?: string;
 }
 

v2/src/lib/components/Agent/AgentPane.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { onMount, onDestroy } from 'svelte';
+  import { onMount } from 'svelte';
   import { marked, Renderer } from 'marked';
   import { queryAgent, stopAgent, isAgentReady, restartAgent } from '../../adapters/agent-bridge';
   import {
@@ -68,11 +68,8 @@
     }
   });
 
-  onDestroy(() => {
-    if (session?.status === 'running' || session?.status === 'starting') {
-      stopAgent(sessionId).catch(() => {});
-    }
-  });
+  // NOTE: Do NOT stop agents in onDestroy — it fires on layout changes/remounts,
+  // not just explicit close. Stop-on-close is handled by TilingGrid.
 
   let followUpPrompt = $state('');
 

v2/src/lib/components/Layout/TilingGrid.svelte

@@ -14,6 +14,8 @@
   } from '../../stores/layout.svelte';
   import { detachPane } from '../../utils/detach';
   import { isDetachedMode } from '../../utils/detach';
+  import { stopAgent } from '../../adapters/agent-bridge';
+  import { getAgentSession } from '../../stores/agents.svelte';
 
   let gridTemplate = $derived(getGridTemplate());
   let panes = $derived(getPanes());
@@ -162,7 +164,15 @@
         <PaneContainer
           title={pane.title}
           status={pane.focused ? 'running' : 'idle'}
-          onClose={() => removePane(pane.id)}
+          onClose={() => {
+            if (pane.type === 'agent') {
+              const s = getAgentSession(pane.id);
+              if (s?.status === 'running' || s?.status === 'starting') {
+                stopAgent(pane.id).catch(() => {});
+              }
+            }
+            removePane(pane.id);
+          }}
           onDetach={detached ? undefined : () => handleDetach(pane)}
         >
           {#if pane.type === 'terminal'}