diff --git a/.jules/bolt.md b/.jules/bolt.md
index 18bfea9..aaa84e6 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -5,3 +5,5 @@
 ## 2025-12-18 - [JSON Unmarshalling] **Learning:** Polymorphic JSON messages (flat structure) often lead to double parsing (once for type, once for content). **Action:** Use a "Unified" struct containing all possible fields to allow single-pass unmarshalling when fields do not collide.
 
 ## 2024-05-22 - [Buffer String Construction] **Learning:** Using `strings.Builder` with `Grow` is significantly faster than `bytes.Buffer` for constructing strings from parts, as `strings.Builder.String()` avoids the final allocation. **Action:** Prefer `strings.Builder` over `bytes.Buffer` when the final goal is a `string`.
+
+## 2026-01-29 - [System Call Hoisting] **Learning:** `os.Executable()` on Linux performs a `readlink` syscall which is not cached by the Go runtime. In a loop, this syscall overhead dominates execution time (e.g., ~2.8µs vs ~0.35µs per op). **Action:** Hoist `os.Executable()` and similar system calls (like `os.Getwd`) out of hot loops.
diff --git a/cmd/daemon.go b/cmd/daemon.go
index 0ca04a0..c80c02f 100644
--- a/cmd/daemon.go
+++ b/cmd/daemon.go
@@ -417,6 +417,12 @@ func generateCronContent(jobs []protocol.JobDefinition, systemMode bool) []byte
 	buf.WriteString("SHELL=/bin/bash\n")
 	buf.WriteString("PATH=/usr/local/bin:/usr/bin:/bin\n\n")
 
+	// Self-executable path
+	execPath, err := os.Executable()
+	if err != nil {
+		execPath = "/usr/local/bin/cc-agent"
+	}
+
 	for _, job := range jobs {
 		if containsNewline(job.CronExpression) || containsNewline(job.JobID) || containsNewline(job.Command) {
 			log.Printf("Skipping job %q: contains invalid characters", job.JobID)
@@ -434,12 +440,6 @@ func generateCronContent(jobs []protocol.JobDefinition, systemMode bool) []byte
 			buf.WriteString("root ")
 		}
 
-		// Self-executable path
-		execPath, err := os.Executable()
-		if err != nil {
-			execPath = "/usr/local/bin/cc-agent"
-		}
-
 		buf.WriteString(execPath)
 		buf.WriteString(" exec --job-id ")
 		writeShellQuote(&buf, job.JobID)