Add file size limits test

PROGRESS.md

@@ -513,3 +513,4 @@ Sprint 5 in progress. Step 141 (Emacs daemon with user config) done. Next: Step
 | 2026-02-10 | Codex | Step 163: Telemetry + crash logging (opt-in), settings toggle, and log writer. 3/3 tests pass. |
 | 2026-02-10 | Codex | Step 164: Update checker stub + installer manifests/config, settings UI for update URL. 3/3 tests pass. |
 | 2026-02-10 | Codex | Step 165: Sprint 5 integration tests across primitives, projection, pipeline, composition, and Emacs indexing. 8/8 tests pass. |
+| 2026-02-10 | Codex | Added `file_limits_test` to enforce architecture file size limits (with temporary allowlist for known oversize headers). 4/4 tests pass. |

editor/CMakeLists.txt

@@ -220,6 +220,8 @@ target_link_libraries(tree_sitter_go PUBLIC unofficial::tree-sitter::tree-sitter
 set(_ts_org_src ${tree-sitter-org_SOURCE_DIR}/src/parser.c)
 if(EXISTS "${tree-sitter-org_SOURCE_DIR}/src/scanner.c")
     list(APPEND _ts_org_src "${tree-sitter-org_SOURCE_DIR}/src/scanner.c")
+elseif(EXISTS "${tree-sitter-org_SOURCE_DIR}/src/scanner.cc")
+    list(APPEND _ts_org_src "${tree-sitter-org_SOURCE_DIR}/src/scanner.cc")
 endif()
 add_library(tree_sitter_org STATIC ${_ts_org_src})
 target_include_directories(tree_sitter_org PUBLIC ${tree-sitter-org_SOURCE_DIR}/src)
@@ -927,6 +929,23 @@ target_link_libraries(step165_test PRIVATE
     tree_sitter_rust
     tree_sitter_go)
 
+add_executable(file_limits_test tests/file_limits_test.cpp)
+target_include_directories(file_limits_test PRIVATE src)
+
+add_executable(step166_test tests/step166_test.cpp)
+target_include_directories(step166_test PRIVATE src)
+target_link_libraries(step166_test PRIVATE
+    nlohmann_json::nlohmann_json
+    unofficial::tree-sitter::tree-sitter
+    tree_sitter_python
+    tree_sitter_cpp
+    tree_sitter_elisp
+    tree_sitter_javascript
+    tree_sitter_typescript
+    tree_sitter_java
+    tree_sitter_rust
+    tree_sitter_go)
+
 find_package(SDL2 CONFIG REQUIRED)
 find_package(OpenGL REQUIRED)
 find_package(glad CONFIG REQUIRED)

editor/tests/file_limits_test.cpp

@@ -0,0 +1,89 @@
+// Sprint 6 guard: enforce architecture file size limits
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <string>
+
+static void expect(bool cond, const std::string& name, int& passed, int& failed) {
+    if (cond) {
+        std::cout << "Test " << (passed + failed + 1) << " PASS: " << name << "\n";
+        ++passed;
+    } else {
+        std::cout << "Test " << (passed + failed + 1) << " FAIL: " << name << "\n";
+        ++failed;
+    }
+}
+
+static int countLines(const std::string& path) {
+    std::ifstream in(path);
+    if (!in.is_open()) return -1;
+    int lines = 0;
+    std::string line;
+    while (std::getline(in, line)) {
+        ++lines;
+    }
+    return lines;
+}
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    const int maxHeaderLines = 600;
+    const int maxMainLines = 1500;
+
+    namespace fs = std::filesystem;
+    fs::path root = fs::current_path();
+    fs::path srcDir = root / "editor" / "src";
+    fs::path mainPath = srcDir / "main.cpp";
+
+    int mainLines = countLines(mainPath.string());
+    expect(mainLines >= 0, "main.cpp readable", passed, failed);
+    if (mainLines >= 0) {
+        expect(mainLines <= maxMainLines, "main.cpp line limit", passed, failed);
+    }
+
+    int headerCount = 0;
+    int overs = 0;
+    std::vector<std::string> allowlist = {
+        (srcDir / "ast" / "CppGenerator.h").string(),
+        (srcDir / "ast" / "JavaGenerator.h").string(),
+        (srcDir / "ast" / "JavaScriptGenerator.h").string(),
+        (srcDir / "ast" / "Parser.h").string(),
+        (srcDir / "CodeEditorWidget.h").string(),
+        (srcDir / "EditorState.h").string(),
+        (srcDir / "EditorUtils.h").string(),
+        (srcDir / "panels" / "BottomPanel.h").string(),
+        (srcDir / "panels" / "EditorPanel.h").string(),
+        (srcDir / "SyntaxHighlighter.h").string()
+    };
+    for (const auto& entry : fs::recursive_directory_iterator(srcDir)) {
+        if (!entry.is_regular_file()) continue;
+        auto path = entry.path();
+        if (path.extension() != ".h") continue;
+        ++headerCount;
+        int lines = countLines(path.string());
+        if (lines < 0) {
+            expect(false, "read header " + path.string(), passed, failed);
+            continue;
+        }
+        if (lines > maxHeaderLines) {
+            bool allowed = std::find(allowlist.begin(), allowlist.end(),
+                                     path.string()) != allowlist.end();
+            if (allowed) {
+                std::cout << "Allowlisted oversize header (" << lines << "): "
+                          << path.string() << "\n";
+                continue;
+            }
+            ++overs;
+            std::cout << "Header too long (" << lines << "): " << path.string() << "\n";
+        }
+    }
+
+    expect(headerCount > 0, "header scan", passed, failed);
+    expect(overs == 0, "header line limits", passed, failed);
+
+    std::cout << "\n=== File Limits Results: " << passed << " passed, "
+              << failed << " failed ===\n";
+    return failed == 0 ? 0 : 1;
+}