fix(agent): isolate conversation workspaces

src/routes/chat.ts

@@ -155,7 +155,9 @@ export const buildChatRouter = (
     const actorKey = toActorKey(userId);
     const projectKey = toProjectKey(projectId);
     const requestedSessionId = parsed.data.session_id?.trim();
-    const sessionId = requestedSessionId || (await runtime.createSession()).id;
+    const sessionId =
+      requestedSessionId ||
+      (await runtime.createSession(undefined, { conversationWorkspace: true })).id;
 
     const { record, created } = await sessionMetadataStore.ensure({
       actorKey,
@@ -451,7 +453,9 @@ export const buildChatRouter = (
         res.status(404).json({ message: "source session not found" });
         return;
       }
-      const forkSession = await runtime.createSession();
+      const forkSession = await runtime.createSession(undefined, {
+        conversationWorkspace: true,
+      });
       const { record: targetSessionRecord } = await sessionMetadataStore.ensure({
         actorKey,
         parentSessionId: sourceSessionId,
@@ -874,6 +878,7 @@ export const buildChatRouter = (
           traceId: requestContext.traceId,
           projectId: requestContext.projectId,
           signal: abortController.signal,
+          workspaceRoot: binding.workspaceDirectory,
           write: (event, data) => {
             publish(event, data);
           },

src/routes/chatPermissionPolicy.ts

@@ -62,9 +62,32 @@ export const resolvePermissionApproval = (
   permission: string,
   context: PermissionApprovalContext = {},
 ) => {
+  if (isDirectRecursiveForceRemove(permission, context)) {
+    return {
+      autoApprove: false,
+      autoReject: true,
+      title: "已拒绝递归强制删除",
+      detail: "当前安全策略禁止直接执行带 recursive 和 force 参数的 rm 命令。",
+    } as const;
+  }
+
+  if (
+    approvalMode === "always" &&
+    normalizePermission(permission) === "bash" &&
+    containsPotentialRemoveCommand(context)
+  ) {
+    return {
+      autoApprove: false,
+      autoReject: false,
+      title: "等待删除命令确认",
+      detail: "删除命令不会由始终允许模式代为批准，请确认本次具体操作。",
+    } as const;
+  }
+
   if (approvalMode === "always") {
     return {
       autoApprove: true,
+      autoReject: false,
       title: "已按始终允许模式放行",
       detail:
         "当前会话处于始终允许模式，已放行本次权限请求；明确禁止的权限仍由 OpenCode 拒绝。",
@@ -74,6 +97,7 @@ export const resolvePermissionApproval = (
   if (approvalMode === "auto" && canAutoApprovePermission(permission, context)) {
     return {
       autoApprove: true,
+      autoReject: false,
       title: "已自动批准低风险权限",
       detail: "当前批准模式允许自动执行低风险工具，已放行本次请求。",
     } as const;
@@ -81,11 +105,135 @@ export const resolvePermissionApproval = (
 
   return {
     autoApprove: false,
+    autoReject: false,
     title: "等待权限确认",
     detail: undefined,
   } as const;
 };
 
+const isDirectRecursiveForceRemove = (
+  permission: string,
+  context: PermissionApprovalContext,
+): boolean => {
+  if (normalizePermission(permission) !== "bash") {
+    return false;
+  }
+  const command =
+    typeof context.metadata?.command === "string"
+      ? context.metadata.command
+      : context.patterns?.join("\n");
+  if (!command) {
+    return false;
+  }
+
+  return splitShellCommandSegments(command).some((segment) => {
+    const words = tokenizeShellSegment(segment);
+    let commandIndex = 0;
+    while (commandIndex < words.length) {
+      const word = words[commandIndex]!;
+      const executable = word.split("/").at(-1)?.toLowerCase();
+      if (word === "!" || /^[A-Za-z_][A-Za-z0-9_]*=/.test(word)) {
+        commandIndex += 1;
+        continue;
+      }
+      if (executable === "command") {
+        commandIndex += 1;
+        while (words[commandIndex]?.startsWith("-") && words[commandIndex] !== "--") {
+          commandIndex += 1;
+        }
+        if (words[commandIndex] === "--") commandIndex += 1;
+        continue;
+      }
+      if (executable === "env") {
+        commandIndex += 1;
+        while (commandIndex < words.length) {
+          const envWord = words[commandIndex]!;
+          if (envWord === "--") {
+            commandIndex += 1;
+            break;
+          }
+          if (envWord === "-u" || envWord === "--unset") {
+            commandIndex += 2;
+            continue;
+          }
+          if (
+            envWord.startsWith("-") ||
+            /^[A-Za-z_][A-Za-z0-9_]*=/.test(envWord)
+          ) {
+            commandIndex += 1;
+            continue;
+          }
+          break;
+        }
+        continue;
+      }
+      if (executable === "sudo" || executable === "doas") {
+        commandIndex += 1;
+        while (words[commandIndex]?.startsWith("-")) {
+          commandIndex += 1;
+        }
+        continue;
+      }
+      if (executable === "busybox" && words[commandIndex + 1] === "rm") {
+        commandIndex += 1;
+      }
+      break;
+    }
+
+    const executable = words[commandIndex]?.split("/").at(-1)?.toLowerCase();
+    if (executable !== "rm") {
+      return false;
+    }
+
+    let recursive = false;
+    let force = false;
+    for (const word of words.slice(commandIndex + 1)) {
+      if (word === "--") {
+        break;
+      }
+      if (word === "--recursive") {
+        recursive = true;
+      } else if (word === "--force") {
+        force = true;
+      } else if (/^-[^-]/.test(word)) {
+        recursive ||= /[rR]/.test(word.slice(1));
+        force ||= word.slice(1).includes("f");
+      }
+    }
+    return recursive && force;
+  });
+};
+
+const containsPotentialRemoveCommand = (
+  context: PermissionApprovalContext,
+): boolean => {
+  const command =
+    typeof context.metadata?.command === "string"
+      ? context.metadata.command
+      : context.patterns?.join("\n");
+  if (!command) {
+    return false;
+  }
+  const normalized = command
+    .replace(/\$\{[^}]*\}|\$[A-Za-z_][A-Za-z0-9_]*/gu, "")
+    .replace(/["'\\]/gu, "");
+  return /(^|[^A-Za-z0-9_])(?:[^\s/]+\/)*rm(?=$|[^A-Za-z0-9_])/iu.test(normalized);
+};
+
+const splitShellCommandSegments = (command: string): string[] =>
+  command.split(/&&|\|\||[;|()\n]/u);
+
+const tokenizeShellSegment = (segment: string): string[] =>
+  (segment.match(/(?:[^\s"'\\]+|"(?:\\.|[^"])*"|'[^']*')+/gu) ?? []).map(
+    (word) => {
+      const quoted = word.match(/^(?:"([\s\S]*)"|'([\s\S]*)')$/u);
+      return (quoted ? (quoted[1] ?? quoted[2] ?? "") : word).replace(
+        /(["'])|\\(.)/gu,
+        "$2",
+      );
+    },
+  );
+
 const isSafeWorkspaceSearch = (
   permission: "glob" | "grep",
   context: PermissionApprovalContext,

src/routes/chatStream.ts

@@ -71,6 +71,7 @@ type StreamPromptOptions = {
   traceId?: string;
   projectId?: string;
   signal?: AbortSignal;
+  workspaceRoot?: string;
   write: (event: string, data: Record<string, unknown>) => void;
 };
 
@@ -157,6 +158,7 @@ export const streamPromptResponse = async ({
   traceId,
   projectId,
   signal,
+  workspaceRoot,
   write,
 }: StreamPromptOptions): Promise<{
   aborted: boolean;
@@ -397,7 +399,7 @@ export const streamPromptResponse = async ({
           {
             metadata: event.properties.metadata,
             patterns: event.properties.patterns,
-            workspaceRoot: process.cwd(),
+            workspaceRoot: workspaceRoot ?? process.cwd(),
           },
         );
         logDevelopmentDebug("permission request received", {
@@ -410,20 +412,25 @@ export const streamPromptResponse = async ({
         emitProgress({
           id: `permission-${event.properties.id}`,
           phase: "permission",
-          status: permissionApproval.autoApprove ? "completed" : "running",
+          status: permissionApproval.autoReject
+            ? "error"
+            : permissionApproval.autoApprove
+              ? "completed"
+              : "running",
           title: permissionApproval.title,
           detail: permissionApproval.detail ?? buildPermissionDetail(event),
         });
-        if (permissionApproval.autoApprove) {
+        if (permissionApproval.autoApprove || permissionApproval.autoReject) {
+          const reply = permissionApproval.autoReject ? "reject" : "once";
           await runtime.replyPermission({
             requestId: event.properties.id,
             sessionId,
-            reply: "once",
+            reply,
           });
           write("permission_response", {
             session_id: clientSessionId,
             request_id: event.properties.id,
-            reply: "once" satisfies PermissionReply,
+            reply: reply satisfies PermissionReply,
           });
           continue;
         }
@@ -448,7 +455,7 @@ export const streamPromptResponse = async ({
           {
             metadata: event.properties.metadata,
             patterns: event.properties.resources,
-            workspaceRoot: process.cwd(),
+            workspaceRoot: workspaceRoot ?? process.cwd(),
           },
         );
         logDevelopmentDebug("permission v2 request received", {
@@ -461,20 +468,25 @@ export const streamPromptResponse = async ({
         emitProgress({
           id: `permission-${event.properties.id}`,
           phase: "permission",
-          status: permissionApproval.autoApprove ? "completed" : "running",
+          status: permissionApproval.autoReject
+            ? "error"
+            : permissionApproval.autoApprove
+              ? "completed"
+              : "running",
           title: permissionApproval.title,
           detail: permissionApproval.detail ?? buildPermissionV2Detail(event),
         });
-        if (permissionApproval.autoApprove) {
+        if (permissionApproval.autoApprove || permissionApproval.autoReject) {
+          const reply = permissionApproval.autoReject ? "reject" : "once";
           await runtime.replyPermission({
             requestId: event.properties.id,
             sessionId,
-            reply: "once",
+            reply,
           });
           write("permission_response", {
             session_id: clientSessionId,
             request_id: event.properties.id,
-            reply: "once" satisfies PermissionReply,
+            reply: reply satisfies PermissionReply,
           });
           continue;
         }