diff --git a/autonomy/run.sh b/autonomy/run.sh
index f1314526..aa6fd8d6 100755
--- a/autonomy/run.sh
+++ b/autonomy/run.sh
@@ -9740,7 +9740,15 @@ def process_stream():
                         elif tool == "Bash":
                             tool_desc = tool_input.get("description", tool_input.get("command", "")[:60])
                         elif tool == "Grep":
-                            tool_desc = f"pattern: {tool_input.get('pattern', '')}"
+                            # NOTE: This Python block runs as the argument of
+                            # bash `python3 -u -c`, wrapped in a bash single-
+                            # quoted string. Any single-quoted Python literal
+                            # here would close bash SQ mid-code and Python
+                            # would receive `tool_input.get(pattern, )`, a
+                            # bare identifier instead of a string literal,
+                            # crashing with NameError. Use double quotes and
+                            # string concatenation to stay SQ-safe.
+                            tool_desc = "pattern: " + tool_input.get("pattern", "")
                         elif tool == "Glob":
                             tool_desc = tool_input.get("pattern", "")
 
diff --git a/tests/test-bugfix-audit.sh b/tests/test-bugfix-audit.sh
index 78a382f8..4e09ef67 100755
--- a/tests/test-bugfix-audit.sh
+++ b/tests/test-bugfix-audit.sh
@@ -349,14 +349,47 @@ test_source "BUG-CMD-012: worktree merge uses env var for signal file" \
 test_source "BUG-GH-011: gh status has space before version" \
     'installed \$\(gh --version'
 
+# -------------------------------------------
+# BUG-RUN-004: Claude stream processor Grep branch used a single-quoted
+# Python literal inside a bash single-quoted heredoc (python3 -u -c '...'),
+# silently breaking bash SQ and making Python see a bare identifier instead
+# of the "pattern" string, crashing with NameError on every Grep tool call.
+# Fix: use double quotes and concatenation, no single-quoted literals in
+# the Python block.
+# -------------------------------------------
+RUN_SH="$SCRIPT_DIR/../autonomy/run.sh"
+
+((TOTAL++))
+if grep -qE 'tool_input\.get\("pattern", ""\)' "$RUN_SH"; then
+    log_pass "BUG-RUN-004: Grep branch reads pattern with double quotes"
+else
+    log_fail "BUG-RUN-004: Grep branch reads pattern with double quotes" \
+        "expected double-quoted .get(\"pattern\", \"\")"
+fi
+
+((TOTAL++))
+if grep -qE "tool_input\.get\('pattern'" "$RUN_SH"; then
+    log_fail "BUG-RUN-004: no single-quoted 'pattern' literal in run.sh" \
+        "single-quoted literal reintroduced -- breaks bash SQ in python3 -u -c"
+else
+    log_pass "BUG-RUN-004: no single-quoted 'pattern' literal in run.sh"
+fi
+
 # -------------------------------------------
 # Syntax validation
 # -------------------------------------------
 ((TOTAL++))
 if bash -n "$LOKI" 2>/dev/null; then
-    log_pass "bash -n syntax validation passes"
+    log_pass "bash -n syntax validation passes (loki)"
+else
+    log_fail "bash -n syntax validation (loki)" "script has syntax errors"
+fi
+
+((TOTAL++))
+if bash -n "$RUN_SH" 2>/dev/null; then
+    log_pass "bash -n syntax validation passes (run.sh)"
 else
-    log_fail "bash -n syntax validation" "script has syntax errors"
+    log_fail "bash -n syntax validation (run.sh)" "script has syntax errors"
 fi
 
 # -------------------------------------------