GoKawiilI was inspecting Claude Code for privacy reasons.
Most devs give their harnesses ridiculous access. FS, shell, git, browser access, even computer use nowadays. That is the whole point. They need enough context to do useful work.
That also means the client itself deserves scrutiny. If a coding agent can read your repo and run commands, the binary that ships it should be boring (ƒor example, pi harness)
So I took a look at my local Claude Code (2.1.196) install.
Marker
Inside the Claude Code binary, there is a function that changes the current date string inserted into the system prompt.
The normal string looks like this:
text Copy Today's date is 2026-06-30.
Claude Code can silently change two things:
The apostrophe in Today's The date separator, from - to /
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