conductor(checkpoint): Fix markdown_helper.py for imgui-bundle >=1.92.801 complete

conductor/tracks/markdown_helper_language_api_compat_20260603/plan.md

@@ -1,24 +1,32 @@
 # Implementation Plan: Fix markdown_helper.py for imgui-bundle >=1.92.801
 
-## Phase 1: Red - Confirm bug
+## Phase 1: Red - Confirm bug [checkpoint: pre-existing 7a34edf]
 - [x] Task 1.1: Run `tests/test_clean_install.py` in opt-in mode (RUN_CLEAN_INSTALL_TEST=1) - confirm AttributeError on TextEditor.LanguageDefinitionId
 - [x] Task 1.2: Capture full traceback for git note
 
-## Phase 2: Green - Apply version-compat shim
-- [ ] Task 2.1: Add module-level `_get_language_id(name)` helper to markdown_helper.py
-- [ ] Task 2.2: Add module-level `_set_editor_language(editor, lang_obj)` helper
-- [ ] Task 2.3: Add module-level `_get_editor_language_name(editor)` helper
-- [ ] Task 2.4: Replace `_lang_map` initialization to use `_get_language_id(...)`
-- [ ] Task 2.5: Replace lines 128, 134, 135, 136 with shim calls
-- [ ] Task 2.6: Handle the "none" fallback case (return None, skip set call)
-- [ ] Task 2.7: Syntax check (ast.parse)
+## Phase 2: Green - Apply version-compat shim [checkpoint: 7a34edf]
+- [x] Task 2.1: Add module-level `_get_language_id(name)` helper to markdown_helper.py
+- [x] Task 2.2: Add module-level `_set_editor_language(editor, lang_obj)` helper
+- [x] Task 2.3: Replace `_lang_map` initialization to use `_get_language_id(...)`
+- [x] Task 2.4: Replace set/get language calls with shim calls
+- [x] Task 2.5: Add parallel `_editor_lang_cache` to track current language tag per editor
+- [x] Task 2.6: Handle the "none" fallback case (return None, skip set call)
+- [x] Task 2.7: Syntax check (ast.parse)
 
-## Phase 3: Verify
-- [ ] Task 3.1: Run `tests/test_clean_install.py` in opt-in mode - should pass (1 passed, clone+sync+launch+hook API)
-- [ ] Task 3.2: Run local markdown-related tests (if any) to ensure no regression in 1.92.5 env
-- [ ] Task 3.3: Import test for the new helpers (both APIs should work)
+## Phase 3: Verify [checkpoint: 7a34edf]
+- [x] Task 3.1: Run `tests/test_clean_install.py` in opt-in mode - 1 passed in 16.56s
+- [x] Task 3.2: Shim import test in local 1.92.5 env - works
+- [x] Task 3.3: Shim import test in cloned 1.92.801 env - works (no AttributeError)
 
-## Phase 4: Commit
-- [ ] Task 4.1: Atomic commit with descriptive message
-- [ ] Task 4.2: Git note with root cause analysis
-- [ ] Task 4.3: Update tracks.md to register this fix track
+## Phase 4: Test URL fix [checkpoint: b306f8f]
+- [x] Task 4.1: Test still failed with 404 on /api/mma_status
+- [x] Task 4.2: Searched actual endpoints in src/api_hooks.py
+- [x] Task 4.3: Correct URL is /api/gui/mma_status (line 181)
+- [x] Task 4.4: Updated test, re-ran, PASSED
+
+## Phase 5: Commit + Register
+- [x] Task 5.1: Atomic commit (7a34edf) with descriptive message + git note
+- [x] Task 5.2: Atomic commit (b306f8f) for test URL fix + git note
+- [x] Task 5.3: Update tracks.md to register this fix track
+- [ ] Task 5.4: conductor(checkpoint) commit
+- [ ] Task 5.5: Clean up demo dir + stale log files