KUkube-system·Apr 16, 2026
Claude code had certain negative-response behavior in hard-coded regex: https://github.com/alex000kim/claude-code/blob/main/src/util...
In Codex Hacked a Samsung TValex000kim
claude-code
TypeScript2026–2026
alex000kim / claude-code
claude-code
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| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| Mar 31 | 2026-03-31 00:00:00 UTC | 2026-04-01 00:00:00 UTC | 2 | 0 | 2 |
| Apr 1 | 2026-04-01 00:00:00 UTC | 2026-04-02 00:00:00 UTC | 0 | 0 | 0 |
| Apr 2 | 2026-04-02 00:00:00 UTC | 2026-04-03 00:00:00 UTC | 0 | 0 | 0 |
| Apr 3 | 2026-04-03 00:00:00 UTC | 2026-04-04 00:00:00 UTC | 0 | 0 | 0 |
| Apr 4 | 2026-04-04 00:00:00 UTC | 2026-04-05 00:00:00 UTC | 0 | 0 | 0 |
| Apr 5 | 2026-04-05 00:00:00 UTC | 2026-04-06 00:00:00 UTC | 0 | 0 | 0 |
| Apr 6 | 2026-04-06 00:00:00 UTC | 2026-04-07 00:00:00 UTC | 0 | 0 | 0 |
| Apr 7 | 2026-04-07 00:00:00 UTC | 2026-04-08 00:00:00 UTC | 0 | 0 | 0 |
| Apr 8 | 2026-04-08 00:00:00 UTC | 2026-04-09 00:00:00 UTC | 0 | 0 | 0 |
| Apr 9 | 2026-04-09 00:00:00 UTC | 2026-04-10 00:00:00 UTC | 0 | 0 | 0 |
| Apr 10 | 2026-04-10 00:00:00 UTC | 2026-04-11 00:00:00 UTC | 0 | 0 | 0 |
| Apr 11 | 2026-04-11 00:00:00 UTC | 2026-04-12 00:00:00 UTC | 0 | 0 | 0 |
| Apr 12 | 2026-04-12 00:00:00 UTC | 2026-04-13 00:00:00 UTC | 0 | 0 | 0 |
| Apr 13 | 2026-04-13 00:00:00 UTC | 2026-04-14 00:00:00 UTC | 0 | 0 | 0 |
| Apr 14 | 2026-04-14 00:00:00 UTC | 2026-04-15 00:00:00 UTC | 0 | 0 | 0 |
| Apr 15 | 2026-04-15 00:00:00 UTC | 2026-04-16 00:00:00 UTC | 0 | 0 | 0 |
| Apr 16 | 2026-04-16 00:00:00 UTC | 2026-04-17 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
3 sourcesThe name "Undercover mode" and the line `The phrase "Claude Code" or any mention that you are an AI` sound spooky, but after reading the source my first knee-jerk reaction wouldn't be "this is for pretending to be human" given that the file is largely about hiding Anthropic internal information such as code names. I encourage looking at the source itself in order to draw your conclusions, it's very short: https://github.com/alex000kim/claude-code/blob/main/src/util...
In The Claude Code Source Leak: fake tools, frustration regexes, undercover modetechnically you're correct, but look at the prompt https://github.com/alex000kim/claude-code/blob/main/src/util...
it's written to _actively_ avoid any signs of AI generated code when "in a PUBLIC/OPEN-SOURCE repository".
Also, it's not about you. Undercover mode only activates for Anthropic employees (it's gated on USER_TYPE === 'ant', which is a build-time flag baked into internal builds).
In The Claude Code Source Leak: fake tools, frustration regexes, undercover mode