diff --git a/architect/architect-run.sh b/architect/architect-run.sh
index 26b3da0..0edeb70 100755
--- a/architect/architect-run.sh
+++ b/architect/architect-run.sh
@@ -48,6 +48,13 @@ WORKTREE="/tmp/${PROJECT_NAME}-architect-run"
 # shellcheck disable=SC2034  # consumed by agent-sdk.sh and env.sh log()
 LOG_AGENT="architect"
 
+# Override log() to append to architect-specific log file
+# shellcheck disable=SC2034
+log() {
+  local agent="${LOG_AGENT:-architect}"
+  printf '[%s] %s: %s\n' "$(date -u '+%Y-%m-%dT%H:%M:%SZ')" "$agent" "$*" >> "$LOG_FILE"
+}
+
 # ── Guards ────────────────────────────────────────────────────────────────
 check_active architect
 acquire_cron_lock "/tmp/architect-run.lock"
diff --git a/planner/planner-run.sh b/planner/planner-run.sh
index f93f839..3c71d44 100755
--- a/planner/planner-run.sh
+++ b/planner/planner-run.sh
@@ -47,6 +47,13 @@ WORKTREE="/tmp/${PROJECT_NAME}-planner-run"
 # shellcheck disable=SC2034  # consumed by agent-sdk.sh and env.sh log()
 LOG_AGENT="planner"
 
+# Override log() to append to planner-specific log file
+# shellcheck disable=SC2034
+log() {
+  local agent="${LOG_AGENT:-planner}"
+  printf '[%s] %s: %s\n' "$(date -u '+%Y-%m-%dT%H:%M:%SZ')" "$agent" "$*" >> "$LOG_FILE"
+}
+
 # ── Guards ────────────────────────────────────────────────────────────────
 check_active planner
 acquire_cron_lock "/tmp/planner-run.lock"
diff --git a/predictor/predictor-run.sh b/predictor/predictor-run.sh
index 36e69ad..889fe1c 100755
--- a/predictor/predictor-run.sh
+++ b/predictor/predictor-run.sh
@@ -48,6 +48,13 @@ WORKTREE="/tmp/${PROJECT_NAME}-predictor-run"
 # shellcheck disable=SC2034  # consumed by agent-sdk.sh and env.sh log()
 LOG_AGENT="predictor"
 
+# Override log() to append to predictor-specific log file
+# shellcheck disable=SC2034
+log() {
+  local agent="${LOG_AGENT:-predictor}"
+  printf '[%s] %s: %s\n' "$(date -u '+%Y-%m-%dT%H:%M:%SZ')" "$agent" "$*" >> "$LOG_FILE"
+}
+
 # ── Guards ────────────────────────────────────────────────────────────────
 check_active predictor
 acquire_cron_lock "/tmp/predictor-run.lock"
diff --git a/review/review-poll.sh b/review/review-poll.sh
index 34ca9d7..72a6e85 100755
--- a/review/review-poll.sh
+++ b/review/review-poll.sh
@@ -30,7 +30,8 @@ LOG_AGENT="review"
 # Override log() to append to review-specific log file
 # shellcheck disable=SC2034
 log() {
-  command log "$@" >> "$LOGFILE"
+  local agent="${LOG_AGENT:-review}"
+  printf '[%s] %s: %s\n' "$(date -u '+%Y-%m-%dT%H:%M:%SZ')" "$agent" "$*" >> "$LOGFILE"
 }
 
 # Log rotation
diff --git a/supervisor/supervisor-run.sh b/supervisor/supervisor-run.sh
index b304b99..0411177 100755
--- a/supervisor/supervisor-run.sh
+++ b/supervisor/supervisor-run.sh
@@ -50,6 +50,13 @@ WORKTREE="/tmp/${PROJECT_NAME}-supervisor-run"
 # shellcheck disable=SC2034  # consumed by agent-sdk.sh and env.sh log()
 LOG_AGENT="supervisor"
 
+# Override log() to append to supervisor-specific log file
+# shellcheck disable=SC2034
+log() {
+  local agent="${LOG_AGENT:-supervisor}"
+  printf '[%s] %s: %s\n' "$(date -u '+%Y-%m-%dT%H:%M:%SZ')" "$agent" "$*" >> "$LOG_FILE"
+}
+
 # ── Guards ────────────────────────────────────────────────────────────────
 check_active supervisor
 acquire_cron_lock "/tmp/supervisor-run.lock"