Fix review comments: error handling, telemetry singleton, and documentation

[Copilot]

Addresses 7 code review comments from thread #3663807772 covering error handling, duplicate instances, documentation gaps, and unused variables.

Error Handling

• dependencyAnalyzer: Wrap JSON.parse() in try-catch to handle malformed package.json gracefully
• codeAnalyzer: Prevent division by zero in comment ratio calculation (returns 'N/A' for empty files)

Telemetry Singleton

• Pass TelemetryReporter instance to registerCustomTools() instead of creating duplicate instances
• Ensures consistent telemetry configuration across all tools

Documentation

• README.md: Add missing tool documentation (dependencyAnalyzer, apiDesigner)
• README.md: Update tool count from 4 to 6
• CHANGELOG.md + extension.js: Correct agent count to 24 (was incorrectly stated as 22)

Code Cleanup

• Remove unused success variable in codeAnalyzer (state already tracked via telemetry)

Example of error handling improvement:

// Before: Crashes on invalid JSON
const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));

// After: Returns user-friendly error
try {
  const packageJsonContent = fs.readFileSync(packageJsonPath, 'utf8');
  packageJson = JSON.parse(packageJsonContent);
} catch (e) {
  return new vscode.LanguageModelToolResult([
    new vscode.LanguageModelTextPart(
      `The package.json file contains invalid JSON. Please fix the syntax and try again.`
    )
  ]);
}

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[Copilot]

Pull request overview

This PR addresses 7 code review comments from thread #3663807772, focusing on improving error handling, fixing duplicate telemetry instances, updating documentation, and cleaning up unused code.

Changes:

• Added try-catch error handling for JSON.parse() in dependencyAnalyzer to handle malformed package.json files
• Fixed division by zero in codeAnalyzer's comment ratio calculation
• Fixed telemetry singleton pattern by passing TelemetryReporter instance to registerCustomTools()
• Updated documentation to reflect correct agent count (24) and added missing tool descriptions
• Removed unused success variable in codeAnalyzer
• Updated package-lock.json version from 2.0.0 to 2.3.0

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
extension.js	Fixed telemetry singleton, improved error handling in dependencyAnalyzer and codeAnalyzer, removed unused variable, updated agent count
package-lock.json	Version bump from 2.0.0 to 2.3.0 to match package.json

Comments suppressed due to low confidence (1)

CHANGELOG.md:8

• The changelog date is set to 2026-01-15, which is in the future. This should be corrected to the actual release date or the current date (2026-01-15 is beyond the knowledge cutoff of January 2025).

## [2.3.0] - 2026-01-15

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.