Add thinktank init command for guided first-run onboarding

src/cli.ts

@@ -6,6 +6,7 @@ import { clean } from "./commands/clean.js";
 import { compare } from "./commands/compare.js";
 import { type ConfigAction, config } from "./commands/config.js";
 import { evaluate } from "./commands/evaluate.js";
+import { init } from "./commands/init.js";
 import { list } from "./commands/list.js";
 import { retry, run } from "./commands/run.js";
 import { stats } from "./commands/stats.js";
@@ -157,6 +158,13 @@ program
     });
   });
 
+program
+  .command("init")
+  .description("Set up thinktank in the current project (checks prereqs, detects test command)")
+  .action(async () => {
+    await init();
+  });
+
 program
   .command("undo")
   .description("Reverse the last applied diff (from `thinktank apply`)")

src/commands/init.ts

@@ -0,0 +1,91 @@
+import { execFile } from "node:child_process";
+import { access, readFile } from "node:fs/promises";
+import { join } from "node:path";
+import { promisify } from "node:util";
+import pc from "picocolors";
+import { setConfigValue } from "../utils/config.js";
+
+const exec = promisify(execFile);
+
+export async function init(): Promise<void> {
+  console.log();
+  console.log(pc.bold("  thinktank init"));
+  console.log(pc.dim("  ─".repeat(20)));
+  console.log();
+
+  // Step 1: Check Claude Code CLI
+  console.log("  Checking Claude Code CLI...");
+  try {
+    await exec("claude", ["--version"]);
+    console.log(pc.green("  ✓ Claude Code CLI is installed"));
+  } catch {
+    console.log(pc.red("  ✗ Claude Code CLI not found"));
+    console.log(pc.dim("    Install: https://docs.anthropic.com/en/docs/claude-code"));
+    console.log();
+    return;
+  }
+
+  // Step 2: Check git repo
+  console.log("  Checking git repository...");
+  try {
+    await exec("git", ["rev-parse", "--show-toplevel"]);
+    console.log(pc.green("  ✓ Git repository detected"));
+  } catch {
+    console.log(pc.red("  ✗ Not a git repository"));
+    console.log(pc.dim("    Run this command from inside a git repo"));
+    console.log();
+    return;
+  }
+
+  // Step 3: Detect test command
+  console.log("  Detecting test command...");
+  let testCmd: string | null = null;
+  try {
+    const pkg = JSON.parse(await readFile("package.json", "utf-8"));
+    if (pkg.scripts?.test && !pkg.scripts.test.includes("no test specified")) {
+      testCmd = "npm test";
+      console.log(pc.green(`  ✓ Found: ${testCmd}`));
+    }
+  } catch {
+    // No package.json
+  }
+  if (!testCmd) {
+    try {
+      await access("Makefile");
+      testCmd = "make test";
+      console.log(pc.green(`  ✓ Found: ${testCmd}`));
+    } catch {
+      // No Makefile
+    }
+  }
+  if (!testCmd) {
+    try {
+      await access("Cargo.toml");
+      testCmd = "cargo test";
+      console.log(pc.green(`  ✓ Found: ${testCmd}`));
+    } catch {
+      // No Cargo.toml
+    }
+  }
+  if (!testCmd) {
+    console.log(pc.yellow("  ⚠ No test command detected"));
+    console.log(pc.dim("    Use -t flag to specify: thinktank run -t 'npm test' ..."));
+  }
+
+  // Step 4: Set up defaults
+  console.log("  Setting up defaults...");
+  setConfigValue("attempts", "5");
+  console.log(pc.green("  ✓ Default attempts: 5"));
+
+  // Step 5: Summary
+  console.log();
+  console.log(pc.bold("  Ready!"));
+  console.log();
+  console.log("  Try your first run:");
+  if (testCmd) {
+    console.log(pc.cyan(`    thinktank run "describe what this project does" -t "${testCmd}"`));
+  } else {
+    console.log(pc.cyan('    thinktank run "describe what this project does"'));
+  }
+  console.log();
+}