feat(directives): add rule-statement header to 57-63 of 66 v1.md files

conductor/directives/test_sandbox/v1.md

@@ -1,3 +1,5 @@
+# The test sandbox is enforced via four-layer rules (FR1-FR4) — see the styleguide
+
 ## The 4-Layer Model
 
 | Layer | Mechanism | Where | Default-on? |

conductor/directives/type_hints_required/v1.md

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+# All functions, methods, parameters, and class-level variables must have type hints
+
 ## 2. Type Annotations
 
 - **All functions and methods** must have return type annotations.

conductor/directives/typed_dataclass_fields/v1.md

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+# Data classes use explicit typed fields via `@dataclass(frozen=True, slots=True)` — no dict[str, Any]
+
 ### 8.5 The Python Type Promotion Mandate (added 2026-06-25)
 
 **C11/Odin/Jai semantics in a Python runtime.** This codebase is written in Python because of practical constraints (time, dependencies, LLM codegen ability), but the convention is to make Python behave as close to a statically-typed value-typed language as the runtime allows. **LLMs default to opaque types (`dict[str, Any]`, `Any`, `Optional[T]`, `hasattr()` polymorphism) because that's what idiomatic Python training data looks like. That defaults to mediocrity; this rule overrides it.**

conductor/directives/ui_delegation_for_hot_reload/v1.md

@@ -1,2 +1,4 @@
+# Complex ImGui rendering lives in module-level render_xxx(app) functions, not App class methods
+
 From `conductor/product-guidelines.md` §"Code Standards & Architecture":
 - **UI Delegation for Hot-Reload:** All complex ImGui rendering logic must be extracted from the `App` class into module-level functions named `render_xxx(app: App)`. The `App` class should only contain thin delegation wrappers (`def _render_xxx(self): render_xxx(self)`). This architecture is mandatory for supporting state-preserving hot-reloads of the UI logic.

conductor/directives/undo_redo_100_snapshot_capacity/v1.md

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+# The history undo/redo stack has 100-snapshot capacity with debounced change detection
+
 ## HistoryManager — the 100-snapshot undo/redo stack
 
 `src/history.py:71 HistoryManager` is a 100-snapshot capacity stack with the following API:

conductor/directives/verbose_commit_message_ban/v1.md

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+# Commit messages must be 1-3 sentences — longer than 15 lines is a confession, not a commit
+
 ### 7. The Verbose-Commit-Message Pattern (kill it)
 
 **Symptom:** Your commit message is 50 lines. It contains the root cause analysis, the alternatives you considered, the side effects you considered, the cross-references, the "what this doesn't fix", the "what to verify", and a personal essay. The commit message is longer than the diff it describes.

conductor/directives/verify_before_editing/v1.md

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+# Before any edit on a file you haven't touched recently: py_check_syntax, get_file_slice, check the contract
+
 ### Rule 2. Verify Before Editing
 
 Before ANY edit to a function you haven't touched recently: