diff --git a/autoplan/SKILL.md b/autoplan/SKILL.md
index 695cdcb11..9afcdf391 100644
--- a/autoplan/SKILL.md
+++ b/autoplan/SKILL.md
@@ -640,7 +640,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -649,7 +649,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/canary/SKILL.md b/canary/SKILL.md
index 95dc82fe6..ffaf2e7e9 100644
--- a/canary/SKILL.md
+++ b/canary/SKILL.md
@@ -632,7 +632,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -641,7 +641,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/codex/SKILL.md b/codex/SKILL.md
index 2ddbabc87..ff35f0a98 100644
--- a/codex/SKILL.md
+++ b/codex/SKILL.md
@@ -635,7 +635,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -644,7 +644,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/context-restore/SKILL.md b/context-restore/SKILL.md
index becf13369..d7436793e 100644
--- a/context-restore/SKILL.md
+++ b/context-restore/SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/context-save/SKILL.md b/context-save/SKILL.md
index 3625efdba..274b54d47 100644
--- a/context-save/SKILL.md
+++ b/context-save/SKILL.md
@@ -635,7 +635,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -644,7 +644,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/cso/SKILL.md b/cso/SKILL.md
index 1add06b4b..804734a45 100644
--- a/cso/SKILL.md
+++ b/cso/SKILL.md
@@ -638,7 +638,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -647,7 +647,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/design-consultation/SKILL.md b/design-consultation/SKILL.md
index 9b5e235c3..3a6232d95 100644
--- a/design-consultation/SKILL.md
+++ b/design-consultation/SKILL.md
@@ -658,7 +658,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -667,7 +667,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/design-html/SKILL.md b/design-html/SKILL.md
index fec3c3d3d..ad85a7eda 100644
--- a/design-html/SKILL.md
+++ b/design-html/SKILL.md
@@ -639,7 +639,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -648,7 +648,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/design-review/SKILL.md b/design-review/SKILL.md
index dce3ccbd5..68304d0c8 100644
--- a/design-review/SKILL.md
+++ b/design-review/SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/design-shotgun/SKILL.md b/design-shotgun/SKILL.md
index a664da86f..71a6fbe14 100644
--- a/design-shotgun/SKILL.md
+++ b/design-shotgun/SKILL.md
@@ -653,7 +653,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -662,7 +662,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/devex-review/SKILL.md b/devex-review/SKILL.md
index 766c38527..e1dbb124b 100644
--- a/devex-review/SKILL.md
+++ b/devex-review/SKILL.md
@@ -638,7 +638,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -647,7 +647,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/document-generate/SKILL.md b/document-generate/SKILL.md
index c15065c6d..1445c523b 100644
--- a/document-generate/SKILL.md
+++ b/document-generate/SKILL.md
@@ -638,7 +638,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -647,7 +647,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/document-release/SKILL.md b/document-release/SKILL.md
index 5c5ec112a..fc1d7ad90 100644
--- a/document-release/SKILL.md
+++ b/document-release/SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/health/SKILL.md b/health/SKILL.md
index e6eeb4609..bc7fbdc55 100644
--- a/health/SKILL.md
+++ b/health/SKILL.md
@@ -634,7 +634,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -643,7 +643,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/investigate/SKILL.md b/investigate/SKILL.md
index 0a13927cd..965b05c81 100644
--- a/investigate/SKILL.md
+++ b/investigate/SKILL.md
@@ -673,7 +673,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -682,7 +682,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/ios-clean/SKILL.md b/ios-clean/SKILL.md
index 9419c9e8d..44296897f 100644
--- a/ios-clean/SKILL.md
+++ b/ios-clean/SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/ios-design-review/SKILL.md b/ios-design-review/SKILL.md
index 2be1456a5..ff129e2c6 100644
--- a/ios-design-review/SKILL.md
+++ b/ios-design-review/SKILL.md
@@ -638,7 +638,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -647,7 +647,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/ios-fix/SKILL.md b/ios-fix/SKILL.md
index 1bd9ee48e..e2e0d0beb 100644
--- a/ios-fix/SKILL.md
+++ b/ios-fix/SKILL.md
@@ -639,7 +639,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -648,7 +648,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/ios-qa/SKILL.md b/ios-qa/SKILL.md
index 61697af4b..1eb872dde 100644
--- a/ios-qa/SKILL.md
+++ b/ios-qa/SKILL.md
@@ -642,7 +642,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -651,7 +651,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/ios-sync/SKILL.md b/ios-sync/SKILL.md
index 432768345..f6f53f8be 100644
--- a/ios-sync/SKILL.md
+++ b/ios-sync/SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/land-and-deploy/SKILL.md b/land-and-deploy/SKILL.md
index 7145ab656..d0da0366b 100644
--- a/land-and-deploy/SKILL.md
+++ b/land-and-deploy/SKILL.md
@@ -631,7 +631,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -640,7 +640,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/landing-report/SKILL.md b/landing-report/SKILL.md
index 6bf4f5220..07a1f52cc 100644
--- a/landing-report/SKILL.md
+++ b/landing-report/SKILL.md
@@ -633,7 +633,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -642,7 +642,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/learn/SKILL.md b/learn/SKILL.md
index 77a708ef0..cf13ab045 100644
--- a/learn/SKILL.md
+++ b/learn/SKILL.md
@@ -634,7 +634,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -643,7 +643,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/office-hours/SKILL.md b/office-hours/SKILL.md
index 5286a6eec..4584e4421 100644
--- a/office-hours/SKILL.md
+++ b/office-hours/SKILL.md
@@ -669,7 +669,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -678,7 +678,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/pair-agent/SKILL.md b/pair-agent/SKILL.md
index d97aa99bc..95e8673e3 100644
--- a/pair-agent/SKILL.md
+++ b/pair-agent/SKILL.md
@@ -634,7 +634,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -643,7 +643,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/plan-ceo-review/SKILL.md b/plan-ceo-review/SKILL.md
index f2eb83529..20c10d549 100644
--- a/plan-ceo-review/SKILL.md
+++ b/plan-ceo-review/SKILL.md
@@ -663,7 +663,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -672,7 +672,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/plan-design-review/SKILL.md b/plan-design-review/SKILL.md
index 2c493c2b5..0e2940c7f 100644
--- a/plan-design-review/SKILL.md
+++ b/plan-design-review/SKILL.md
@@ -635,7 +635,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -644,7 +644,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/plan-devex-review/SKILL.md b/plan-devex-review/SKILL.md
index 1665c3113..9b1b4d453 100644
--- a/plan-devex-review/SKILL.md
+++ b/plan-devex-review/SKILL.md
@@ -641,7 +641,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -650,7 +650,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/plan-eng-review/SKILL.md b/plan-eng-review/SKILL.md
index ad5f6f7d2..33bf00829 100644
--- a/plan-eng-review/SKILL.md
+++ b/plan-eng-review/SKILL.md
@@ -639,7 +639,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -648,7 +648,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/plan-tune/SKILL.md b/plan-tune/SKILL.md
index 91e6fbf7d..300ed8081 100644
--- a/plan-tune/SKILL.md
+++ b/plan-tune/SKILL.md
@@ -644,7 +644,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -653,7 +653,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/qa-only/SKILL.md b/qa-only/SKILL.md
index 1df889835..d9aeb3464 100644
--- a/qa-only/SKILL.md
+++ b/qa-only/SKILL.md
@@ -634,7 +634,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -643,7 +643,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/qa/SKILL.md b/qa/SKILL.md
index 2a5c13b13..27c17db33 100644
--- a/qa/SKILL.md
+++ b/qa/SKILL.md
@@ -640,7 +640,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -649,7 +649,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/retro/SKILL.md b/retro/SKILL.md
index ef984308e..b85621bcd 100644
--- a/retro/SKILL.md
+++ b/retro/SKILL.md
@@ -654,7 +654,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -663,7 +663,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/review/SKILL.md b/review/SKILL.md
index a178f8f7c..ce3efba1b 100644
--- a/review/SKILL.md
+++ b/review/SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
@@ -924,7 +924,7 @@ for PLAN_DIR in "$HOME/.gstack/projects/$_PLAN_SLUG" "$HOME/.claude/plans" "$HOM
   [ -d "$PLAN_DIR" ] || continue
   PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$BRANCH" 2>/dev/null | head -1)
   [ -z "$PLAN" ] && PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$REPO" 2>/dev/null | head -1)
-  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$PLAN" ] && break
 done
 [ -n "$PLAN" ] && echo "PLAN_FILE: $PLAN" || echo "NO_PLAN_FILE"
diff --git a/scripts/resolvers/preamble/generate-context-recovery.ts b/scripts/resolvers/preamble/generate-context-recovery.ts
index 46403b688..14da79c5a 100644
--- a/scripts/resolvers/preamble/generate-context-recovery.ts
+++ b/scripts/resolvers/preamble/generate-context-recovery.ts
@@ -12,7 +12,7 @@ eval "$(${binDir}/gstack-slug 2>/dev/null)"
 _PROJ="\${GSTACK_HOME:-$HOME/.gstack}/projects/\${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/\${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/\${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -21,7 +21,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\\"branch\\":\\"\${_BRANCH}\\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/scripts/resolvers/review.ts b/scripts/resolvers/review.ts
index aea233dbe..1c4f255c7 100644
--- a/scripts/resolvers/review.ts
+++ b/scripts/resolvers/review.ts
@@ -866,7 +866,7 @@ for PLAN_DIR in "$HOME/.gstack/projects/$_PLAN_SLUG" "$HOME/.claude/plans" "$HOM
   [ -d "$PLAN_DIR" ] || continue
   PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$BRANCH" 2>/dev/null | head -1)
   [ -z "$PLAN" ] && PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$REPO" 2>/dev/null | head -1)
-  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$PLAN" ] && break
 done
 [ -n "$PLAN" ] && echo "PLAN_FILE: $PLAN" || echo "NO_PLAN_FILE"
diff --git a/setup-deploy/SKILL.md b/setup-deploy/SKILL.md
index b4edcecb1..8908e5c27 100644
--- a/setup-deploy/SKILL.md
+++ b/setup-deploy/SKILL.md
@@ -635,7 +635,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -644,7 +644,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/setup-gbrain/SKILL.md b/setup-gbrain/SKILL.md
index 91a2b4c24..4c56f258d 100644
--- a/setup-gbrain/SKILL.md
+++ b/setup-gbrain/SKILL.md
@@ -634,7 +634,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -643,7 +643,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/ship/SKILL.md b/ship/SKILL.md
index 1a44b4dd3..a6557356e 100644
--- a/ship/SKILL.md
+++ b/ship/SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/ship/sections/plan-completion.md b/ship/sections/plan-completion.md
index 207d80d63..61270f41d 100644
--- a/ship/sections/plan-completion.md
+++ b/ship/sections/plan-completion.md
@@ -26,7 +26,7 @@ for PLAN_DIR in "$HOME/.gstack/projects/$_PLAN_SLUG" "$HOME/.claude/plans" "$HOM
   [ -d "$PLAN_DIR" ] || continue
   PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$BRANCH" 2>/dev/null | head -1)
   [ -z "$PLAN" ] && PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$REPO" 2>/dev/null | head -1)
-  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$PLAN" ] && break
 done
 [ -n "$PLAN" ] && echo "PLAN_FILE: $PLAN" || echo "NO_PLAN_FILE"
diff --git a/skillify/SKILL.md b/skillify/SKILL.md
index 0c85ad5af..48d6d5a75 100644
--- a/skillify/SKILL.md
+++ b/skillify/SKILL.md
@@ -633,7 +633,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -642,7 +642,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/spec/SKILL.md b/spec/SKILL.md
index 309dfbff2..3303f497e 100644
--- a/spec/SKILL.md
+++ b/spec/SKILL.md
@@ -634,7 +634,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -643,7 +643,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/sync-gbrain/SKILL.md b/sync-gbrain/SKILL.md
index c7b995fb2..0b0cb01ed 100644
--- a/sync-gbrain/SKILL.md
+++ b/sync-gbrain/SKILL.md
@@ -635,7 +635,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -644,7 +644,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/test/empty-find-fallthrough.test.ts b/test/empty-find-fallthrough.test.ts
new file mode 100644
index 000000000..363ba4743
--- /dev/null
+++ b/test/empty-find-fallthrough.test.ts
@@ -0,0 +1,92 @@
+/**
+ * Empty `find | xargs ls -t` must not fall through to cwd (#2483).
+ *
+ * GNU xargs runs `ls -t` once even on EMPTY input, and `ls -t` with no
+ * operands lists the CURRENT DIRECTORY — so on a fresh install (no
+ * ceo-plans / checkpoints / plans yet) a random cwd .md becomes "the plan"
+ * or "the latest checkpoint". `xargs -r` pins the BSD skip-on-empty
+ * behavior on both GNU and BSD (same shape as the landed
+ * bin/gstack-codex-session-import fix, #2482).
+ *
+ * Re-derived from community PR #2483 by @tranthanhnhatkhoa.
+ */
+import { describe, test, expect } from 'bun:test';
+import { execSync } from 'child_process';
+import * as fs from 'fs';
+import * as os from 'os';
+import * as path from 'path';
+import { HOST_PATHS } from '../scripts/resolvers/types';
+import type { TemplateContext } from '../scripts/resolvers/types';
+import { generateContextRecovery } from '../scripts/resolvers/preamble/generate-context-recovery';
+
+const ROOT = path.join(import.meta.dir, '..');
+
+function makeCtx(): TemplateContext {
+  return {
+    skillName: 'test-skill',
+    tmplPath: 'test.tmpl',
+    host: 'claude',
+    paths: HOST_PATHS.claude,
+    preambleTier: 2,
+  };
+}
+
+describe('empty find must not fall through to cwd (#2483)', () => {
+  test('no resolver emits a bare `xargs ls -t` (must be `xargs -r ls -t`)', () => {
+    const out = execSync(
+      `grep -rn "xargs ls -t" "${path.join(ROOT, 'scripts')}" "${path.join(ROOT, 'bin')}" || true`,
+      { encoding: 'utf-8' },
+    );
+    expect(out.trim()).toBe('');
+  });
+
+  test('rendered Context Recovery uses the guarded form at both find sites', () => {
+    const rendered = generateContextRecovery(makeCtx());
+    const bareSites = rendered.split('xargs ls -t').length - 1;
+    expect(bareSites).toBe(0);
+    const guardedSites = rendered.split('xargs -r ls -t').length - 1;
+    expect(guardedSites).toBe(2);
+  });
+
+  test('live block: empty checkpoints dir yields NO checkpoint, not a cwd file', () => {
+    const rendered = generateContextRecovery(makeCtx());
+    const m = rendered.match(/_LATEST_CP=\$\(.*\)/);
+    expect(m).not.toBeNull();
+    const line = m![0];
+
+    const home = fs.mkdtempSync(path.join(os.tmpdir(), 'gstack-home-'));
+    const cwd = fs.mkdtempSync(path.join(os.tmpdir(), 'gstack-cwd-'));
+    try {
+      // Fresh install shape: the checkpoints dir exists but is EMPTY,
+      // and the cwd holds a decoy markdown file.
+      const proj = path.join(home, 'projects', 'unknown');
+      fs.mkdirSync(path.join(proj, 'checkpoints'), { recursive: true });
+      fs.writeFileSync(path.join(cwd, 'DECOY.md'), '# not a checkpoint\n');
+
+      const script = `_PROJ="${proj}"\n${line.replace(/\$\{_PROJ\}|"\$_PROJ"/g, '"$_PROJ"')}\necho "LATEST_CP=[$_LATEST_CP]"`;
+      const out = execSync(`bash -c '${script.replace(/'/g, `'\\''`)}'`, {
+        cwd,
+        encoding: 'utf-8',
+      });
+      expect(out).toContain('LATEST_CP=[]');
+      expect(out).not.toContain('DECOY.md');
+    } finally {
+      fs.rmSync(home, { recursive: true, force: true });
+      fs.rmSync(cwd, { recursive: true, force: true });
+    }
+  });
+
+  test('no generated SKILL.md carries the unguarded form', () => {
+    const out = execSync(
+      `grep -rln "xargs ls -t" --include=SKILL.md "${ROOT}" || true`,
+      { encoding: 'utf-8' },
+    );
+    // node_modules and vendored trees are not generated output; nothing in
+    // the repo's generated skills may carry the unguarded form.
+    const hits = out
+      .split('\n')
+      .filter(Boolean)
+      .filter((f) => !f.includes('node_modules'));
+    expect(hits).toEqual([]);
+  });
+});
diff --git a/test/fixtures/golden/claude-ship-SKILL.md b/test/fixtures/golden/claude-ship-SKILL.md
index 1a44b4dd3..a6557356e 100644
--- a/test/fixtures/golden/claude-ship-SKILL.md
+++ b/test/fixtures/golden/claude-ship-SKILL.md
@@ -636,7 +636,7 @@ eval "$(~/.claude/skills/gstack/bin/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -645,7 +645,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
diff --git a/test/fixtures/golden/codex-ship-SKILL.md b/test/fixtures/golden/codex-ship-SKILL.md
index 4e3fcd5ce..657091927 100644
--- a/test/fixtures/golden/codex-ship-SKILL.md
+++ b/test/fixtures/golden/codex-ship-SKILL.md
@@ -622,7 +622,7 @@ eval "$($GSTACK_BIN/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -631,7 +631,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
@@ -1715,7 +1715,7 @@ for PLAN_DIR in "$HOME/.gstack/projects/$_PLAN_SLUG" "$HOME/.claude/plans" "$HOM
   [ -d "$PLAN_DIR" ] || continue
   PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$BRANCH" 2>/dev/null | head -1)
   [ -z "$PLAN" ] && PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$REPO" 2>/dev/null | head -1)
-  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$PLAN" ] && break
 done
 [ -n "$PLAN" ] && echo "PLAN_FILE: $PLAN" || echo "NO_PLAN_FILE"
diff --git a/test/fixtures/golden/factory-ship-SKILL.md b/test/fixtures/golden/factory-ship-SKILL.md
index 9d4b9943a..87155410f 100644
--- a/test/fixtures/golden/factory-ship-SKILL.md
+++ b/test/fixtures/golden/factory-ship-SKILL.md
@@ -624,7 +624,7 @@ eval "$($GSTACK_BIN/gstack-slug 2>/dev/null)"
 _PROJ="${GSTACK_HOME:-$HOME/.gstack}/projects/${SLUG:-unknown}"
 if [ -d "$_PROJ" ]; then
   echo "--- RECENT ARTIFACTS ---"
-  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs ls -t 2>/dev/null | head -3
+  find "$_PROJ/ceo-plans" "$_PROJ/checkpoints" -type f -name "*.md" 2>/dev/null | xargs -r ls -t 2>/dev/null | head -3
   [ -f "$_PROJ/${_BRANCH}-reviews.jsonl" ] && echo "REVIEWS: $(wc -l < "$_PROJ/${_BRANCH}-reviews.jsonl" | tr -d ' ') entries"
   [ -f "$_PROJ/timeline.jsonl" ] && tail -5 "$_PROJ/timeline.jsonl"
   if [ -f "$_PROJ/timeline.jsonl" ]; then
@@ -633,7 +633,7 @@ if [ -d "$_PROJ" ]; then
     _RECENT_SKILLS=$(grep "\"branch\":\"${_BRANCH}\"" "$_PROJ/timeline.jsonl" 2>/dev/null | grep '"event":"completed"' | tail -3 | grep -o '"skill":"[^"]*"' | sed 's/"skill":"//;s/"//' | tr '\n' ',')
     [ -n "$_RECENT_SKILLS" ] && echo "RECENT_PATTERN: $_RECENT_SKILLS"
   fi
-  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  _LATEST_CP=$(find "$_PROJ/checkpoints" -name "*.md" -type f 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$_LATEST_CP" ] && echo "LATEST_CHECKPOINT: $_LATEST_CP"
   if [ -f "$_PROJ/decisions.active.json" ]; then
     echo "--- ACTIVE DECISIONS (recent, scope-relevant) ---"
@@ -1717,7 +1717,7 @@ for PLAN_DIR in "$HOME/.gstack/projects/$_PLAN_SLUG" "$HOME/.claude/plans" "$HOM
   [ -d "$PLAN_DIR" ] || continue
   PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$BRANCH" 2>/dev/null | head -1)
   [ -z "$PLAN" ] && PLAN=$(ls -t "$PLAN_DIR"/*.md 2>/dev/null | xargs grep -l "$REPO" 2>/dev/null | head -1)
-  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs ls -t 2>/dev/null | head -1)
+  [ -z "$PLAN" ] && PLAN=$(find "$PLAN_DIR" -name '*.md' -mmin -1440 -maxdepth 1 2>/dev/null | xargs -r ls -t 2>/dev/null | head -1)
   [ -n "$PLAN" ] && break
 done
 [ -n "$PLAN" ] && echo "PLAN_FILE: $PLAN" || echo "NO_PLAN_FILE"