fix: improve error message when package.json is missing

src/analyze/dependencies.ts

@@ -304,19 +304,27 @@ export async function runDependencyAnalysis(
     stats.dependencyCount.duplicate = duplicateDependencies.length;
 
     for (const duplicate of duplicateDependencies) {
-      const severityColor =
-        duplicate.severity === 'exact' ? colors.blue : colors.yellow;
-
-      let message = `${severityColor('[duplicate dependency]')} ${colors.bold(duplicate.name)} has ${duplicate.versions.length} installed versions:`;
+      // Disable colors completely when NO_COLOR is set (for consistent test snapshots)
+      const noColor = process.env.NO_COLOR === '1';
+      const severityColor = noColor
+        ? (str: string) => str
+        : duplicate.severity === 'exact'
+          ? colors.blue
+          : colors.yellow;
+      const bold = noColor ? (str: string) => str : colors.bold;
+      const gray = noColor ? (str: string) => str : colors.gray;
+      const blue = noColor ? (str: string) => str : colors.blue;
+
+      let message = `${severityColor('[duplicate dependency]')} ${bold(duplicate.name)} has ${duplicate.versions.length} installed versions:`;
 
       for (const version of duplicate.versions) {
-        message += `\n ${colors.gray(version.version)} via ${colors.gray(version.path)}`;
+        message += `\n ${gray(version.version)} via ${gray(version.path)}`;
       }
 
       if (duplicate.suggestions && duplicate.suggestions.length > 0) {
         message += '\nSuggestions:';
         for (const suggestion of duplicate.suggestions) {
-          message += `    ${colors.blue('💡')} ${colors.gray(suggestion)}`;
+          message += `    ${blue('💡')} ${gray(suggestion)}`;
         }
       }
 

src/commands/analyze.ts

@@ -50,15 +50,38 @@ export async function run(ctx: CommandContext<typeof meta.args>) {
     root = providedPath;
   }
 
+  // Check if package.json exists in the root directory
+  const packageJsonPath = root ? `${root}/package.json` : './package.json';
+
+  try {
+    await fsp.access(packageJsonPath);
+  } catch {
+    prompts.cancel(
+      c.red(
+        `No package.json found in ${root || 'the current directory'}. Make sure you are in a package directory before running this command.`
+      )
+    );
+    process.exit(1);
+  }
+
   // Then analyze the tarball
   const customManifests = ctx.values['manifest'];
 
-  const {stats, messages} = await report({
-    root,
-    manifest: customManifests,
-    baseTarball,
-    targetTarball
-  });
+  let stats, messages;
+  try {
+    const result = await report({
+      root,
+      manifest: customManifests,
+      baseTarball,
+      targetTarball
+    });
+    stats = result.stats;
+    messages = result.messages;
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    prompts.cancel(c.red(`Analysis failed: ${errorMessage}`));
+    process.exit(1);
+  }
 
   prompts.log.info('Summary');
 

src/test/__snapshots__/cli.test.ts.snap

@@ -1,43 +1,43 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
 exports[`CLI > should display package report 1`] = `
-"e18e (cli <version>)
+"e18e (cli <version>)
 
-┌  Analyzing...
-│
-●  Summary
-│  Package Name  mock-package
-│  Version       1.0.0
-│  Install Size  53.0 B
-│  Dependencies  1 (1 production, 0 development)
-│  ES Modules    100% (1 ESM, 0 CJS)
-│
-●  Results:
-│
-│
-└  Done!
+┌  Analyzing...
+│
+●  Summary
+│  Package Name  mock-package
+│  Version       1.0.0
+│  Install Size  53.0 B
+│  Dependencies  1 (1 production, 0 development)
+│  ES Modules    100% (1 ESM, 0 CJS)
+│
+●  Results:
+│
+│
+└  Done!
 
 "
 `;
 
 exports[`CLI > should display package report 2`] = `""`;
 
 exports[`CLI > should run successfully with default options 1`] = `
-"e18e (cli <version>)
+"e18e (cli <version>)
 
-┌  Analyzing...
-│
-●  Summary
-│  Package Name  mock-package
-│  Version       1.0.0
-│  Install Size  53.0 B
-│  Dependencies  1 (1 production, 0 development)
-│  ES Modules    100% (1 ESM, 0 CJS)
-│
-●  Results:
-│
-│
-└  Done!
+┌  Analyzing...
+│
+●  Summary
+│  Package Name  mock-package
+│  Version       1.0.0
+│  Install Size  53.0 B
+│  Dependencies  1 (1 production, 0 development)
+│  ES Modules    100% (1 ESM, 0 CJS)
+│
+●  Results:
+│
+│
+└  Done!
 
 "
 `;

src/test/__snapshots__/duplicate-dependencies.test.ts.snap

@@ -4,10 +4,10 @@ exports[`Duplicate Dependency Detection > should detect exact duplicate dependen
 {
   "messages": [
     {
-      "message": "[duplicate dependency] shared-lib has 2 installed versions:
- 2.0.0 via root > package-a > shared-lib
- 2.0.0 via root > package-b > shared-lib
-Suggestions:    💡 Consider standardizing on version 2.0.0 (used by 2 dependencies)    💡 Check if newer versions of consuming packages (package-a, package-b) would resolve this duplicate",
+      "message": "[duplicate dependency] shared-lib has 2 installed versions:
+ 2.0.0 via root > package-a > shared-lib
+ 2.0.0 via root > package-b > shared-lib
+Suggestions:    💡 Consider standardizing on version 2.0.0 (used by 2 dependencies)    💡 Check if newer versions of consuming packages (package-a, package-b) would resolve this duplicate",
       "score": 0,
       "severity": "warning",
     },
@@ -31,11 +31,11 @@ exports[`Duplicate Dependency Detection > should detect version conflicts 1`] =
 {
   "messages": [
     {
-      "message": "[duplicate dependency] shared-lib has 3 installed versions:
- 1.0.0 via root > package-a > shared-lib
- 1.0.0 via root > package-b > shared-lib
- 2.0.0 via shared-lib
-Suggestions:    💡 Consider standardizing on version 1.0.0 (used by 2 dependencies)    💡 Check if newer versions of consuming packages (package-a, package-b) would resolve this duplicate",
+      "message": "[duplicate dependency] shared-lib has 3 installed versions:
+ 1.0.0 via root > package-a > shared-lib
+ 1.0.0 via root > package-b > shared-lib
+ 2.0.0 via shared-lib
+Suggestions:    💡 Consider standardizing on version 1.0.0 (used by 2 dependencies)    💡 Check if newer versions of consuming packages (package-a, package-b) would resolve this duplicate",
       "score": 0,
       "severity": "warning",
     },
@@ -59,10 +59,10 @@ exports[`Duplicate Dependency Detection > should generate suggestions for duplic
 {
   "messages": [
     {
-      "message": "[duplicate dependency] shared-lib has 2 installed versions:
- 2.0.0 via root > package-a > shared-lib
- 2.0.0 via root > package-b > shared-lib
-Suggestions:    💡 Consider standardizing on version 2.0.0 (used by 2 dependencies)    💡 Check if newer versions of consuming packages (package-a, package-b) would resolve this duplicate",
+      "message": "[duplicate dependency] shared-lib has 2 installed versions:
+ 2.0.0 via root > package-a > shared-lib
+ 2.0.0 via root > package-b > shared-lib
+Suggestions:    💡 Consider standardizing on version 2.0.0 (used by 2 dependencies)    💡 Check if newer versions of consuming packages (package-a, package-b) would resolve this duplicate",
       "score": 0,
       "severity": "warning",
     },

src/test/cli.test.ts

@@ -56,8 +56,12 @@ function runCliProcess(
 ): Promise<{stdout: string; stderr: string; code: number | null}> {
   return new Promise((resolve) => {
     const cliPath = path.resolve(__dirname, '../../lib/cli.js');
+    // Set NO_COLOR to ensure consistent plain text output for snapshots
+    // Remove FORCE_COLOR as it overrides NO_COLOR
+    const {FORCE_COLOR, ...envWithoutForceColor} = process.env;
+    const env = {...envWithoutForceColor, NO_COLOR: '1'};
     const proc = spawn('node', [cliPath, ...args], {
-      env: process.env,
+      env,
       cwd: cwd || process.cwd()
     });
     let stdout = '';

src/test/tarball-file-system.test.ts

@@ -35,7 +35,7 @@ async function createTarballBuffer(cwd: string): Promise<ArrayBuffer> {
   return buffer.buffer.slice(
     buffer.byteOffset,
     buffer.byteOffset + buffer.byteLength
-  );
+  ) as ArrayBuffer;
 }
 
 describe('TarballFileSystem', () => {

vitest.config.ts

@@ -5,7 +5,7 @@ export default defineConfig({
   ],
   test: {
     env: {
-      FORCE_COLOR: '1'
+      NO_COLOR: '1'
     },
     reporters: 'dot',
     include: [