diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 23ee6426..85ce63c2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,7 +33,28 @@ jobs:
 
       - name: Test (Windows)
         if: matrix.os == 'windows-latest'
-        run: go test -tags integration ./...
+        shell: pwsh
+        run: |
+          # go test on Windows can exit 1 due to temp .exe cleanup
+          # ("go: remove ...\.exe: Access is denied") even when all
+          # tests pass. Only suppress that specific pattern.
+          go test -tags integration ./... 2>&1 | Tee-Object -Variable testOut
+          $exitCode = $LASTEXITCODE
+          if ($exitCode -ne 0) {
+            $failed = $testOut | Select-String "^FAIL\s"
+            if ($failed) {
+              Write-Host "Tests failed:"
+              Write-Host ($failed -join "`n")
+              exit 1
+            }
+            $cleanup = $testOut | Select-String "go: remove .+\.exe: Access is denied"
+            if (-not $cleanup) {
+              Write-Host "go test failed with unknown error"
+              exit $exitCode
+            }
+            Write-Host "All tests passed (ignoring temp .exe cleanup error)"
+            exit 0
+          }
 
       - name: Build with CGO disabled
         run: go build ./...
diff --git a/cmd/roborev/tui.go b/cmd/roborev/tui.go
index f6f85227..1d7b7db0 100644
--- a/cmd/roborev/tui.go
+++ b/cmd/roborev/tui.go
@@ -1631,8 +1631,8 @@ func queueHelpLines(width int) int {
 	if width <= 0 {
 		return 2
 	}
-	h1 := (len(queueHelpLine1) + width - 1) / width
-	h2 := (len(queueHelpLine2) + width - 1) / width
+	h1 := (runewidth.StringWidth(queueHelpLine1) + width - 1) / width
+	h2 := (runewidth.StringWidth(queueHelpLine2) + width - 1) / width
 	return h1 + h2
 }
 
@@ -2620,8 +2620,8 @@ func (m tuiModel) renderReviewView() string {
 	const helpLine2 = "↑/↓: scroll | ←/→: prev/next | ?: commands | esc: back"
 	helpLines := 2
 	if m.width > 0 {
-		h1 := (len(helpLine1) + m.width - 1) / m.width
-		h2 := (len(helpLine2) + m.width - 1) / m.width
+		h1 := (runewidth.StringWidth(helpLine1) + m.width - 1) / m.width
+		h2 := (runewidth.StringWidth(helpLine2) + m.width - 1) / m.width
 		helpLines = h1 + h2
 	}
 
diff --git a/internal/agent/claude.go b/internal/agent/claude.go
index 6e17d57e..ed11053d 100644
--- a/internal/agent/claude.go
+++ b/internal/agent/claude.go
@@ -136,14 +136,13 @@ func (a *ClaudeAgent) Review(ctx context.Context, repoPath, commitSHA, prompt st
 	cmd.Dir = repoPath
 	cmd.WaitDelay = 5 * time.Second
 
-	// Handle API key: use configured key if set, otherwise filter out env var
-	// to ensure Claude uses subscription auth instead of unexpected API charges
+	// Strip CLAUDECODE to prevent nested-session detection (#270),
+	// and handle API key (configured key or subscription auth).
+	stripKeys := []string{"ANTHROPIC_API_KEY", "CLAUDECODE"}
 	if apiKey := AnthropicAPIKey(); apiKey != "" {
-		// Use explicitly configured API key from roborev config
-		cmd.Env = append(filterEnv(os.Environ(), "ANTHROPIC_API_KEY"), "ANTHROPIC_API_KEY="+apiKey)
+		cmd.Env = append(filterEnv(os.Environ(), stripKeys...), "ANTHROPIC_API_KEY="+apiKey)
 	} else {
-		// Clear env var so Claude uses subscription auth
-		cmd.Env = filterEnv(os.Environ(), "ANTHROPIC_API_KEY")
+		cmd.Env = filterEnv(os.Environ(), stripKeys...)
 	}
 	// Suppress sounds from Claude Code (notification/completion sounds)
 	cmd.Env = append(cmd.Env, "CLAUDE_NO_SOUND=1")
@@ -253,11 +252,18 @@ func (a *ClaudeAgent) parseStreamJSON(r io.Reader, output io.Writer) (string, er
 }
 
 // filterEnv returns a copy of env with the specified key removed
-func filterEnv(env []string, key string) []string {
-	prefix := key + "="
+func filterEnv(env []string, keys ...string) []string {
 	result := make([]string, 0, len(env))
 	for _, e := range env {
-		if !strings.HasPrefix(e, prefix) {
+		k, _, _ := strings.Cut(e, "=")
+		strip := false
+		for _, key := range keys {
+			if k == key {
+				strip = true
+				break
+			}
+		}
+		if !strip {
 			result = append(result, e)
 		}
 	}
diff --git a/internal/agent/claude_test.go b/internal/agent/claude_test.go
index e9cea81d..78d2127b 100644
--- a/internal/agent/claude_test.go
+++ b/internal/agent/claude_test.go
@@ -239,3 +239,47 @@ func TestFilterEnv(t *testing.T) {
 		t.Fatalf("missing expected env vars in filtered result: %v", filtered)
 	}
 }
+
+func TestFilterEnvMultipleKeys(t *testing.T) {
+	env := []string{
+		"PATH=/usr/bin",
+		"ANTHROPIC_API_KEY=secret",
+		"CLAUDECODE=1",
+		"HOME=/home/test",
+	}
+
+	filtered := filterEnv(env, "ANTHROPIC_API_KEY", "CLAUDECODE")
+
+	if len(filtered) != 2 {
+		t.Fatalf("expected 2 env vars, got %d: %v", len(filtered), filtered)
+	}
+	for _, e := range filtered {
+		if strings.HasPrefix(e, "ANTHROPIC_API_KEY=") {
+			t.Fatal("ANTHROPIC_API_KEY should be stripped")
+		}
+		if strings.HasPrefix(e, "CLAUDECODE=") {
+			t.Fatal("CLAUDECODE should be stripped")
+		}
+	}
+}
+
+func TestFilterEnvExactMatchOnly(t *testing.T) {
+	env := []string{
+		"CLAUDE=1",
+		"CLAUDECODE=1",
+		"CLAUDE_NO_SOUND=1",
+		"PATH=/usr/bin",
+	}
+
+	filtered := filterEnv(env, "CLAUDE")
+
+	if len(filtered) != 3 {
+		t.Fatalf("expected 3 env vars, got %d: %v", len(filtered), filtered)
+	}
+	for _, e := range filtered {
+		k, _, _ := strings.Cut(e, "=")
+		if k == "CLAUDE" {
+			t.Fatal("CLAUDE should be stripped")
+		}
+	}
+}