fix(loop): resolve P0-1 (B-7) git diff CWD isolation and untracked file capture (20/20 PASS)

.agents/skills/multi-agent-mux-loop/scripts/run_loop.sh

@@ -10,6 +10,8 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 REPO_ROOT="$(cd "$SCRIPT_DIR/../../../.." && pwd)"
 # shellcheck disable=SC1091
 source "$REPO_ROOT/.agents/skills/lib.sh"
+# shellcheck disable=SC1091
+source "$REPO_ROOT/.agents/skills/multi-agent-mux-loop/scripts/diff_collect.sh"
 
 # Default configuration parameters
 PLAN_MODE=false
@@ -428,7 +430,7 @@ log_info "=== Phase 2: Code Implementation ==="
 
 # Fix the pre-implementation commit as the diff baseline so review diffs stay
 # cumulative and non-empty even after the Creator commits per DoD (P0-1).
-BASE_COMMIT=$(git rev-parse HEAD 2>/dev/null || echo "")
+BASE_COMMIT=$(cd -P "$REPO_ROOT" 2>/dev/null && git rev-parse HEAD 2>/dev/null || echo "")
 
 EXECUTION_PROMPT="계획서가 존재하지 않으므로, 작업자(Creator)의 판단하에 스스로 구현 계획 및 설계를 수립한 뒤, 이를 바탕으로 코드를 구현하고 다음 작업 목표를 완성해주세요. 작업 목표: $TASK"
 if [ -n "$CURRENT_PLAN" ]; then
@@ -520,6 +522,12 @@ while [ "$loop_count" -le "$MAX_LOOP" ]; do
   else
     log_info "Active reviewers: ${REVIEWERS[*]}"
     
+    CHANGES_DIFF=$(mam_collect_changes_diff "$REPO_ROOT" "$BASE_COMMIT") || {
+      log_error "Could not determine the change set; refusing to request a review on no evidence."
+      log_error "$CHANGES_DIFF"
+      exit 1
+    }
+
     # We use space-separated lists or simple loops to bypass bash-4 associative array requirement (M-7 macOS compatibility)
     declare -a JOB_IDS=()
     declare -a JOB_REVS=()
@@ -530,14 +538,6 @@ while [ "$loop_count" -le "$MAX_LOOP" ]; do
     
     for rev in "${REVIEWERS[@]}"; do
       log_info "Requesting code review from Reviewer '$rev'..."
-      # Cumulative diff since BASE_COMMIT (M-6): includes committed AND
-      # uncommitted changes, so it stays non-empty even after the Creator
-      # commits per the documented DoD (bare `git diff` alone would not).
-      if [ -n "$BASE_COMMIT" ]; then
-        CHANGES_DIFF=$(git diff "$BASE_COMMIT" 2>/dev/null || echo "No git diff available")
-      else
-        CHANGES_DIFF=$(git diff 2>/dev/null || echo "No git diff available")
-      fi
       
       REV_OUTPUT=$(delegate_job_safe submit \
         --agent-session "herdr:$rev" \