Netlify deploy error due to permission issue with react-scripts

[netlify-coding]

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🤖 Agent: Claude

💬 Prompt: The Netlify deploy errored, with the following guidance provided:

• Relevant error lines
  • line 57 – build command running: npm run build
  • line 59 – script invoked: react-scripts build
  • line 60 – actual failure: `...

✅ Result: # Fix Netlify Build Failure: react-scripts Permission Denied

The Netlify deployment was failing with sh: 1: react-scripts: Permission denied (exit code 127) during the npm run build step. A previous fix had already moved react-scripts into dependencies and added a postinstall script to chmod +x the binary, but the permission error persisted across deploys — indicating that the chmod approach was not reliably taking effect in Netlify's build environment before the build command ran.

The root cause is that Netlify's build runner executes the shell-resolved binary at node_modules/.bin/react-scripts, which requires the execute bit to be set on that symlink/file. When that bit is absent (a known issue on some CI/CD Linux environments), the invocation fails regardless of postinstall scripts.

The fix changes the build script in frontend/package.json to invoke react-scripts through node directly:

"build": "node ./node_modules/react-scripts/bin/react-scripts.js build"

Rather than relying on the shell to resolve and execute the binary, the build now calls node (which is always available and executable) and passes the react-scripts entry point as a plain JavaScript file. This completely bypasses the execute-bit requirement and is unaffected by file permission states on the build host. The postinstall chmod script was retained as a harmless safeguard for other tooling that may invoke the binary directly.

[netlify]

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