fix: resolve symlinked npm global bin path for standalone server.js

[NiveditJain]

Summary

• When failproofai is installed globally via npm and run, bun can resolve import.meta.url to the symlink's directory (e.g. ~/.npm-global/bin/) rather than the real package directory, so the .next/standalone/server.js path gets computed as ~/.next/standalone/server.js (missing the lib/node_modules/failproofai portion)
• Fix: wrap fileURLToPath(import.meta.url) with realpathSync in both scripts/launch.ts and bin/failproofai.mjs so symlinks are always resolved before path arithmetic
• Belt-and-suspenders: bin/failproofai.mjs sets FAILPROOFAI_PACKAGE_ROOT early (before any dynamic imports) so launch.ts can use it as a primary source

Test plan

• npm pack the package and install it globally: npm install -g ./failproofai-*.tgz
• Run failproofai from ~ — dashboard should start on port 8020 without the Cannot find module error
• Run bun run test:run — existing tests pass

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved application startup reliability by enhancing how required files are located, ensuring consistent functionality across different installation environments and system configurations.

[coderabbitai]

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Free

Run ID: 1d3e49dd-d61d-4120-810c-f7dcc430c1ad

📥 Commits

Reviewing files that changed from the base of the PR and between ca824cc and e1a9bad.

📒 Files selected for processing (2)

• bin/failproofai.mjs
• scripts/launch.ts

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📝 Walkthrough

Walkthrough

The changes establish a more reliable package root resolution mechanism. The bin/failproofai.mjs script now initializes process.env.FAILPROOFAI_PACKAGE_ROOT early by resolving the real filesystem path and following npm bin symlinks. The scripts/launch.ts then uses this environment variable to locate the Next.js standalone server, replacing the previous direct path calculation.

Changes

Cohort / File(s)	Summary
Package Root Initialization bin/failproofai.mjs	Added Node.js path/URL imports and early initialization of process.env.FAILPROOFAI_PACKAGE_ROOT by resolving the real filesystem path of the script, ensuring it persists to downstream code.
Path Resolution Update scripts/launch.ts	Updated the start mode command argument resolution to use the environment-variable-backed packageRoot instead of direct import.meta.url path calculation, improving reliability across varying module resolution behaviors.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A symlink once posed a puzzle so deep,
But now our brave roots are secure and they keep,
FAILPROOFAI_PACKAGE_ROOT stands tall and true,
Following paths through npm's forest anew! 🌲✨

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Note

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