conductor(refactor): update OOP tracker with Phase 4 progress and 2026-06-02 log

conductor/refactor_oop.md

@@ -2,7 +2,7 @@
 
 Tracks elimination of class-based OOP from the codebase to reduce AI agent scope misinterpretation.
 
-## Status: IN PROGRESS
+## Status: IN PROGRESS (UI Delegation Pattern widely adopted; core classes retained with justification)
 
 ## Phase 1: Leaf Classes (No internal dependents)
 These classes have no dependencies on other classes being refactored. Start here.
@@ -20,14 +20,16 @@ These classes use Phase 1 classes. Refactor Phase 1 first.
 ## Phase 3: Core Classes (High risk - many callers)
 These have many dependents. Handle last with extra testing.
 
-- [ ] `src/ai_client.py` - AI client classes (AIProvider, etc.)
-- [ ] `src/mcp_client.py` - MCPClient, ToolRegistry
-- [ ] `src/models.py` - Data classes → dataclass/NamedTuple
+- [ ] `src/ai_client.py` - AI client classes (AIProvider, etc.) — *justified: holds multi-provider singleton state*
+- [ ] `src/mcp_client.py` - MCPClient, ToolRegistry — *justified: tool dispatch handler map + 3-layer security state*
+- [ ] `src/models.py` - Data classes → dataclass/NamedTuple — *already done: uses pydantic + dataclass(frozen=True)*
 
 ## Phase 4: GUI Classes (Highest risk)
 Classes used in GUI callbacks. Require live testing.
 
-- [ ] `src/gui_2.py` - Main GUI class, panel classes
+- [x] `src/gui_2.py` - **DELEGATION EXTRACTED**: ~90 module-level `render_xxx(app)` functions, `App` class retains only lifecycle and thin `_render_xxx(self)` wrappers. See [docs/guide_gui_2.md](../docs/guide_gui_2.md) §"UI Delegation Pattern".
+- [x] `src/command_palette.py` - **EXTRACTED**: `CommandRegistry` and `render_palette_modal` are module-level. `Command` dataclass is data-only. See [docs/guide_command_palette.md](../docs/guide_command_palette.md).
+- [x] `src/commands.py` - **EXTRACTED**: All 32 commands registered via `@registry.register` decorator at module level.
 
 ## Anti-Regression Protocol
 
@@ -48,6 +50,20 @@ Before refactoring ANY class:
 - Anti-OOP conventions added to `conductor/code_styleguides/python.md`
 - Ruff PLR rules added to `pyproject.toml`
 
+### 2026-06-02
+- `src/gui_2.py` UI Delegation Pattern fully extracted: ~90 module-level `render_xxx(app)` functions. `App` class reduced to thin wrappers.
+- `src/command_palette.py` extracted: `CommandRegistry` is a singleton class holding a dict (justified: needs encapsulated mutable state for register/unregister). All other logic is module-level.
+- `src/commands.py` extracted: All 32 commands are module-level functions registered via `@registry.register`. Two helper functions (`_toggle_window`, `_toggle_attr`) are module-level.
+- `src/models.py` confirmed using pydantic + dataclass(frozen=True) — already follows data-only container pattern. No changes needed.
+- Hot Reload support verified: UI Delegation Pattern enables `HotReloader` to swap `gui_2.render_xxx` references at runtime without losing `app: App` state.
+
+### Pending Refactors (Out of Scope, tracked here)
+- `src/tool_bias.py::ToolBiasEngine` — small class (~50 lines), refactor candidate but currently 1+ methods.
+- `src/session_logger.py::SessionLogger` — facade class, refactor candidate.
+- `src/summarize.py::SummaryCache` — class wraps LRU dict + lock, refactor candidate but lock encapsulation is a valid justification.
+- `src/ai_client.py::AIProvider` subclasses — abstract base with 5 concrete subclasses. Refactor would require feature-flag dispatch, not worth the churn.
+- `src/mcp_client.py::MCPClient` — would split into `dispatch` (function) + `_state` (module globals). See [docs/guide_mcp_client.md](../docs/guide_mcp_client.md) §"dispatch" for current structure.
+
 ## Notes
 
 - Use Strangler Fig pattern: keep class working until last caller migrated