Constant DEFAULT_TIMEOUT_MS 

pub const DEFAULT_TIMEOUT_MS: u64 = 600_000;

Default execution timeout in milliseconds: 10 minutes (600_000 ms).

This is the timeout a Bash built with Bash::new runs with — the hang guard described in Bash::timeout. The value is interpolated into the bash_run tool description so the model knows the baseline it can extend per call via the optional timeout_ms argument.