fix: improve windows pane behavior

1 files changed, 1 insertions, 0 deletions

diff --git a/AGENTS.md b/AGENTS.md
index c83a1d6d..7658a051 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -90,6 +90,7 @@ Do not use GitHub closing keywords like `fixes #<issue-number>`, `closes #<issue
 ## Code Conventions
 
 - Rust: no `unwrap()` in production code. Use `tracing` for logging. Use `#[allow]` only with a comment explaining why.
+- Rust platform-specific code must be compile-gated. Put OS APIs and substantial OS behavior in `src/platform/`; when platform checks are needed elsewhere, use `#[cfg(windows)]`, `#[cfg(unix)]`, or target-specific `#[cfg(...)]` on imports, fields, functions, impls, and match arms so Windows-only code does not compile into Unix builds and Unix-only code does not compile into Windows builds. Use `cfg!(...)` only for pure cross-platform policy constants whose branches both compile on every target.
 - Don't add dependencies without a reason. Check whether existing dependencies cover the need first.
 - Integration asset versions (`HERDR_INTEGRATION_VERSION` markers and matching `*_INTEGRATION_VERSION` constants) are migration versions relative to the latest released tag, not per-commit counters on `master`. If an integration asset changes multiple times between releases, bump it once from the version in the latest release.
 - When changing the server/client wire protocol, compare `src/protocol/wire.rs::PROTOCOL_VERSION` against the latest released tag. Bump it only if the current source protocol is not already greater than the latest released protocol. Update hardcoded protocol expectations and manual protocol fixtures in tests.