Task e: gate debug signal handlers behind build tag

3 files changed, 14 insertions, 3 deletions

diff --git a/internal/debug/signals.go b/internal/debug/signals.go
index 20a463a..adcfb01 100644
--- a/internal/debug/signals.go
+++ b/internal/debug/signals.go
@@ -1,4 +1,4 @@
-//go:build !windows
+//go:build debugsignals && !windows
 
 package debug
 
diff --git a/internal/debug/signals_disabled.go b/internal/debug/signals_disabled.go
new file mode 100644
index 0000000..2c9b65e
--- /dev/null
+++ b/internal/debug/signals_disabled.go
@@ -0,0 +1,10 @@
+//go:build !debugsignals && !windows
+
+package debug
+
+// SetDebugDir sets the directory where debug output files will be written.
+// In production builds, runtime signal diagnostics are disabled.
+func SetDebugDir(dir string) {}
+
+// InitSignalHandlers is a no-op in production builds.
+func InitSignalHandlers() {}
diff --git a/internal/debug/signals_test.go b/internal/debug/signals_test.go
index d7b0d2d..641e638 100644
--- a/internal/debug/signals_test.go
+++ b/internal/debug/signals_test.go
@@ -1,4 +1,5 @@
-// +build !windows
+//go:build debugsignals && !windows
+// +build debugsignals,!windows
 
 package debug
 
@@ -55,7 +56,7 @@ func TestDumpGoroutines(t *testing.T) {
 
 func TestWriteProfile(t *testing.T) {
 	tmpDir := t.TempDir()
-	
+
 	// Test goroutine profile (text format)
 	goroutineFile := filepath.Join(tmpDir, "test-goroutine.txt")
 	if err := writeProfile(goroutineFile, "goroutine", 1); err != nil {