What would you never paste into a server-side developer tool?

I keep running into the same boundary while debugging: the text is useful to

inspect, but it may also contain credentials, customer IDs, internal hosts, or

production context.

The formats I hesitate over most are:

- `.env` and configuration fragments

- stack traces with request data

- JWTs and copied authorization headers

- cURL commands from browser DevTools

- customer JSON and logs

I am building MonoTools around browser-local processing. Magic Paste detects the

format, Secret Scanner creates a redacted copy, Stack Trace Lens isolates

actionable frames, and JSON Repair handles explainable syntax fixes.

Before I lock down more workflows, I would like to understand the real

boundary:

1. What kind of developer data would you refuse to paste into a hosted tool?

2. What is the typical payload size?

3. Is redaction enough, or must the entire workflow stay local?

4. What evidence would make a local-processing claim trustworthy?

The current browser-local workflow is here:

Disclosure: I am building MonoTools and using this thread to decide which

privacy-sensitive workflow to improve next.

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