Fixed some tests.

AGENTS.md

@@ -26,6 +26,8 @@ Read [CONTRIBUTING.md](CONTRIBUTING.md) for detailed safeguards. Compare accepte
 
 Fix regressions in the shared subsystem when appropriate. Identify state ownership, lifetime, reset, and cancellation; keep native callbacks and input/focus handling bounded. Preserve Xorg correctness while allowing capability-based Wayland degradation. Keep Tentacles external and responsive.
 
+Prefer core Go implementations for features users expect from the reader itself; use Tentacles for extensions.
+
 Expose GUI controls through accessibility APIs. Keep outer preferences combo widgets `can-focus=False`; verify Tab/Shift+Tab, popup selection, and Apply/reload. Validate versioned TOML settings through persistence and runtime consumption. Protect passwords; redact private debug output before sharing.
 
 ## Testing Guidelines
@@ -35,3 +37,7 @@ Use Go's `testing` package, `*_test.go`, and `TestBehavior` functions. Start wit
 ## Commit & Pull Request Guidelines
 
 Use short descriptive subjects consistent with history. Confirm the intended target branch; `legacy` preserves Python. Describe behavior, issues, regressions checked, skipped checks, and remaining live acceptance. Human diff review and testing precede submission under the policy in `CONTRIBUTING.md`.
+
+## Guide Maintenance
+
+Update this guide when working rules, repository layout, commands, or verification requirements change. Replace stale guidance instead of appending progress reports; keep detailed procedures in `CONTRIBUTING.md`.