feat(setup): configure flicker-free mode, Windows PowerShell tool, and fix Gemini MCP flag

lib/lib-review-loop

@@ -164,7 +164,7 @@ $prompt"
 #   $1 — prompt text
 run_gemini() {
     local prompt="$1"
-    echo "$prompt" | gemini -p " " --yolo --allowed-mcp-server-names "" \
+    echo "$prompt" | gemini -p " " --yolo --allowed-mcp-server-names "__none__" \
         2> >(grep -v -E 'Warning:.*deprecated|YOLO mode|Session cleanup disabled|Loaded cached credentials' >&2)
 }
 

setup

@@ -503,6 +503,14 @@ configure_claude_settings() {
     if ! echo "$settings" | jq -e '.env.CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS' &>/dev/null; then
         feature_changes+=("teams")
     fi
+    if ! echo "$settings" | jq -e '.env.CLAUDE_CODE_NO_FLICKER' &>/dev/null; then
+        feature_changes+=("noflicker")
+    fi
+    if [[ "$(uname -s)" == MINGW* || "$(uname -s)" == MSYS* || "$(uname -s)" == CYGWIN* ]]; then
+        if ! echo "$settings" | jq -e '.env.CLAUDE_CODE_USE_POWERSHELL_TOOL' &>/dev/null; then
+            feature_changes+=("powershell")
+        fi
+    fi
 
     # ── Check read-only permissions (batch jq, handles legacy :* format) ──
     local perms_json
@@ -533,6 +541,8 @@ configure_claude_settings() {
                 websearch)   echo -e "  • ${BOLD}WebSearch${NC} — allow web searches without prompting" ;;
                 attribution) echo -e "  • ${BOLD}attribution${NC} — disable commit/PR attribution tags" ;;
                 teams)       echo -e "  • ${BOLD}CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1${NC} — enable agent teams" ;;
+                noflicker)   echo -e "  • ${BOLD}CLAUDE_CODE_NO_FLICKER=1${NC} — flicker-free fullscreen rendering" ;;
+                powershell)  echo -e "  • ${BOLD}CLAUDE_CODE_USE_POWERSHELL_TOOL=1${NC} — enable native PowerShell tool" ;;
             esac
         done
         echo ""
@@ -543,6 +553,8 @@ configure_claude_settings() {
                     websearch)   updated=$(echo "$updated" | jq '.permissions.allow = ((.permissions.allow // []) + ["WebSearch"])') ;;
                     attribution) updated=$(echo "$updated" | jq '.attribution = {"commit": "", "pr": ""}') ;;
                     teams)       updated=$(echo "$updated" | jq '.env = ((.env // {}) + {"CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS": "1"})') ;;
+                    noflicker)   updated=$(echo "$updated" | jq '.env = ((.env // {}) + {"CLAUDE_CODE_NO_FLICKER": "1"})') ;;
+                    powershell)  updated=$(echo "$updated" | jq '.env = ((.env // {}) + {"CLAUDE_CODE_USE_POWERSHELL_TOOL": "1"})') ;;
                 esac
             done
             changed=true

test/smoke

@@ -190,7 +190,21 @@ run_smoke_test() {
 
     # Check if we timed out
     if [[ $elapsed -ge $TIMEOUT ]]; then
+        # Gemini retries indefinitely on rate limits. Only skip when the
+        # output shows positive rate-limit evidence; otherwise fall through
+        # so real hangs/regressions still fail the smoke test.
+        if [[ "$agent" == "gemini" ]] && [[ -f "$output_file" ]] && \
+           grep -qE -i 'rate[- ]?limit|resource_exhausted|quota|(^|[^0-9])429([^0-9]|$)' "$output_file"; then
+            echo -e "  ${YELLOW}SKIP${NC}     $name  (rate-limited)"
+            RESULTS+=("SKIP     $name  (rate-limited)")
+            ((SKIPPED++))
+            return 0
+        fi
         echo -e "  ${YELLOW}TIMEOUT${NC}  $name  (>${TIMEOUT}s)"
+        if [[ -f "$output_file" ]]; then
+            echo "           --- last 5 lines of output ---"
+            tail -5 "$output_file" | sed 's/^/           /'
+        fi
         RESULTS+=("TIMEOUT  $name")
         ((FAIL++))
         return 1
@@ -276,6 +290,8 @@ Edit only the divide function. Do not create new files."
 REVIEWER_TOOLS="Read,Write,Bash,Grep,Glob"
 EDITOR_TOOLS="Edit,Read,Write,Bash,Grep,Glob"
 
+SKIPPED=0
+
 # ---- run tests -----------------------------------------------------------
 
 for agent in "${agents[@]}"; do
@@ -297,10 +313,10 @@ done
 
 # ---- summary -------------------------------------------------------------
 
-total=$((PASS + FAIL))
+total=$((PASS + FAIL + SKIPPED))
 echo ""
 echo "==========="
-echo "Results: $PASS passed, $FAIL failed out of $total tests"
+echo "Results: $PASS passed, $FAIL failed, $SKIPPED skipped out of $total tests"
 echo ""
 
 for r in "${RESULTS[@]}"; do