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Dev.to
7/3/2026
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Original: Stop pasting your API keys into ChatGPT: a safer way to feed a codebase to an LLM

Short summary

Developers commonly leak API keys when pasting code into ChatGPT and Claude—credentials end up in third-party prompt logs without warning. Two habits prevent this: always redact secrets before sending code, and count tokens beforehand to avoid silent context overflow. ctxpack, a free MIT-licensed CLI tool, automates both: it scans for recognizable secret patterns (sk-ant-, AKIA..., ghp_), redacts them automatically, estimates token usage per model (Claude/GPT/Gemini), and bundles codebases while respecting .gitignore.

  • API keys leak to third-party prompt logs when pasted directly—always redact before sending
  • Token counting prevents silent truncation—ctxpack estimates per-model budgets before paste
  • ctxpack is free, MIT-licensed, supports Claude/GPT/Gemini, and respects .gitignore

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