feat: add minimal tool set (read/write/patch/shell) to workflow-agent-react (#222)

2026-05-13 02:57:47 +00:00
parent c8de86d7c9
commit ec555b43d1
8 changed files with 184 additions and 0 deletions
@@ -0,0 +1,45 @@
+import { execSync } from "node:child_process";
+import type { ToolEntry } from "./types.js";
+
+const MAX_OUTPUT = 10000;
+
+export const shellExecTool: ToolEntry = {
+  definition: {
+    type: "function",
+    function: {
+      name: "shell_exec",
+      description: "Execute a shell command and return stdout + stderr.",
+      parameters: {
+        type: "object",
+        properties: {
+          command: { type: "string", description: "Shell command to run" },
+          timeout: { type: ["number", "null"], description: "Timeout in seconds (default: 30)" },
+        },
+        required: ["command"],
+      },
+    },
+  },
+  handler: async (args: string): Promise<string> => {
+    try {
+      const parsed = JSON.parse(args) as { command: string; timeout: number | null };
+      const timeoutMs = (parsed.timeout ?? 30) * 1000;
+      const output = execSync(parsed.command, {
+        encoding: "utf-8",
+        timeout: timeoutMs,
+        stdio: ["pipe", "pipe", "pipe"],
+        maxBuffer: MAX_OUTPUT * 2,
+      });
+      return output.length > MAX_OUTPUT ? `${output.slice(0, MAX_OUTPUT)}\n...(truncated)` : output;
+    } catch (err: unknown) {
+      if (err && typeof err === "object" && "status" in err && (err as { status: unknown }).status === null) {
+        return "Error: command timed out";
+      }
+      if (err && typeof err === "object" && "stderr" in err) {
+        const e = err as { stderr: string; stdout: string; status: number };
+        const combined = `${e.stdout ?? ""}${e.stderr ?? ""}`;
+        return combined.length > MAX_OUTPUT ? `${combined.slice(0, MAX_OUTPUT)}\n...(truncated)` : combined || `Error: command exited with status ${e.status}`;
+      }
+      return `Error: ${err instanceof Error ? err.message : String(err)}`;
+    }
+  },
+};