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Claude Code Undercover Mode for public repository safety

March 31, 2026Aakash Gupta, Rohan Paul, TestingCatalog News

Aakash Gupta and Rohan Paul highlight Undercover Mode in the leaked Claude Code, designed to prevent accidental disclosure of internal codenames when contributing to public GitHub repos, underscoring how much safety logic lives in the harness.

Anthropic built a whole system called "Undercover Mode" to stop Claude from accidentally leaking internal codenames in git commits.
The "Undercover Mode" is so interesting.
Its a safety system that kicks in automatically whenever Claude Code is used to contribute code to public or open-source repositories (GitHub PRs, commits, etc.).
The goal is
Aakash Gupta
Rohan Paul
TestingCatalog News
system promptsafetygithubclaudeanthropicgithubclaude codeopen source

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