feat(stats,tmux): global Σ@window stats across processes with flocked cache; width mitigation (narrow/maxlen); configurable [stats] window_minutes; robust coverage parsing; docs update\n\n- Add internal/stats with windowed event cache + flock + atomic writes\n- Wire stats into LSP/CLI/Tmux Action; tmux shows Σ@window with per-model tail\n- HEXAI_TMUX_STATUS_NARROW and HEXAI_TMUX_STATUS_MAXLEN for width control\n- Add [stats] window_minutes to config and apply on startup\n- Improve Magefile coverage handling; add tests to lift coverage >85%\n- Update docs/tmux.md and config example

1 files changed, 22 insertions, 0 deletions

diff --git a/internal/stats/debugstring_test.go b/internal/stats/debugstring_test.go
new file mode 100644
index 0000000..88b2a5e
--- /dev/null
+++ b/internal/stats/debugstring_test.go
@@ -0,0 +1,22 @@
+package stats
+
+import "testing"
+
+func TestSnapshotDebugString(t *testing.T) {
+	s := Snapshot{}
+	s.Global.Reqs = 42
+	s.RPM = 3.14
+	got := s.DebugString()
+	if got == "" || !contains(got, "Σ reqs=42") || !contains(got, "rpm=") {
+		t.Fatalf("unexpected debug string: %q", got)
+	}
+}
+
+func contains(s, sub string) bool {
+	for i := 0; i+len(sub) <= len(s); i++ {
+		if s[i:i+len(sub)] == sub {
+			return true
+		}
+	}
+	return false
+}