Drop usage of execSync, switch to $ util

mcp/files.ts

@@ -1,5 +1,5 @@
-import { execSync } from "node:child_process";
 import { type } from "arktype";
+import { $ } from "../utils/shell.ts";
 import { contextualize, tool } from "./shared.ts";
 
 export const ListFiles = type({
@@ -17,14 +17,19 @@ export const ListFilesTool = tool({
     try {
       // Use git ls-files to list tracked files
       // This respects .gitignore and gives a clean list of source files
-      const command = path === "." ? "git ls-files" : `git ls-files ${path}`;
-      const output = execSync(command, { encoding: "utf-8" });
+      const pathStr = path ?? ".";
+      const output = $("git", pathStr === "." ? ["ls-files"] : ["ls-files", pathStr], {
+        log: false,
+      });
       const files = output.split("\n").filter((f) => f.trim() !== "");
 
       if (files.length === 0) {
         // Fallback for non-git environments or untracked files
-        const findCmd = `find ${path} -maxdepth 3 -not -path '*/.*' -type f`;
-        const findOutput = execSync(findCmd, { encoding: "utf-8" });
+        const findOutput = $(
+          "find",
+          [pathStr, "-maxdepth", "3", "-not", "-path", "*/.*", "-type", "f"],
+          { log: false }
+        );
         return {
           files: findOutput.split("\n").filter((f) => f.trim() !== ""),
           method: "find",

mcp/pr.ts

@@ -1,6 +1,6 @@
-import { execSync } from "node:child_process";
 import { type } from "arktype";
 import { log } from "../utils/cli.ts";
+import { $ } from "../utils/shell.ts";
 import { contextualize, tool } from "./shared.ts";
 
 export const PullRequest = type({
@@ -15,9 +15,7 @@ export const PullRequestTool = tool({
   parameters: PullRequest,
   execute: contextualize(async ({ title, body, base }, ctx) => {
     // Get the current branch name
-    const currentBranch = execSync("git rev-parse --abbrev-ref HEAD", {
-      encoding: "utf8",
-    }).trim();
+    const currentBranch = $("git", ["rev-parse", "--abbrev-ref", "HEAD"], { log: false });
 
     log.info(`Current branch: ${currentBranch}`);
 

mcp/prInfo.ts

@@ -1,6 +1,6 @@
-import { execSync } from "node:child_process";
 import { type } from "arktype";
 import { log } from "../utils/cli.ts";
+import { $ } from "../utils/shell.ts";
 import { contextualize, tool } from "./shared.ts";
 
 export const PullRequestInfo = type({
@@ -30,14 +30,14 @@ export const PullRequestInfoTool = tool({
 
     // Automatically fetch and checkout branches for review
     log.info(`Fetching base branch: origin/${baseBranch}`);
-    execSync(`git fetch origin ${baseBranch} --depth=20`, { stdio: "inherit" });
+    $("git", ["fetch", "origin", baseBranch, "--depth=20"]);
 
     log.info(`Fetching PR branch: origin/${headBranch}`);
-    execSync(`git fetch origin ${headBranch}`, { stdio: "inherit" });
+    $("git", ["fetch", "origin", headBranch]);
 
     log.info(`Checking out PR branch: origin/${headBranch}`);
     // check out a local branch tracking the remote branch so we can push changes
-    execSync(`git checkout -B ${headBranch} origin/${headBranch}`, { stdio: "inherit" });
+    $("git", ["checkout", "-B", headBranch, `origin/${headBranch}`]);
 
     return {
       number: data.number,