chore: sync .cursor from suite

Made-with: Cursor

.cursor/skills/refactor/phases/01-discovery.md

@@ -95,7 +95,7 @@ Also copy to project standard locations:
 
 **Critical step — do not skip.** Before producing the change list, cross-reference documented business flows against actual implementation. This catches issues that static code inspection alone misses.
 
-1. **Read documented flows**: Load `DOCUMENT_DIR/system-flows.md`, `DOCUMENT_DIR/architecture.md`, `DOCUMENT_DIR/module-layout.md`, every file under `DOCUMENT_DIR/contracts/`, and `SOLUTION_DIR/solution.md` (whichever exist). Extract every documented business flow, data path, architectural decision, module ownership boundary, and contract shape.
+1. **Read documented flows**: Load `DOCUMENT_DIR/system-flows.md`, `DOCUMENT_DIR/architecture.md` (paying special attention to its `## Architecture Vision` section — that's the user-confirmed structural intent), `DOCUMENT_DIR/glossary.md`, `DOCUMENT_DIR/module-layout.md`, every file under `DOCUMENT_DIR/contracts/`, and `SOLUTION_DIR/solution.md` (whichever exist). Extract every documented business flow, data path, architectural decision, module ownership boundary, and contract shape. Any refactor change that contradicts a confirmed Architecture Vision principle must either be rejected or surfaced to the user before being added to `list-of-changes.md` — those principles are not refactor targets without explicit user approval.
 
 2. **Trace each flow through code**: For every documented flow (e.g., "video batch processing", "image tiling", "engine initialization"), walk the actual code path line by line. At each decision point ask:
    - Does the code match the documented/intended behavior?

.cursor/skills/refactor/phases/04-execution.md

@@ -21,7 +21,7 @@ The implement skill will:
 1. Parse task files and dependency graph from TASKS_DIR
 2. Detect already-completed tasks (skip non-refactoring tasks from prior workflow steps)
 3. Compute execution batches for the refactoring tasks
-4. Launch implementer subagents (up to 4 in parallel)
+4. Implement tasks sequentially in topological order (no subagents, no parallelism)
 5. Run code review after each batch
 6. Commit and push per batch
 7. Update work item ticket status

.cursor/skills/refactor/phases/07-documentation.md

@@ -32,7 +32,7 @@ For each component doc affected:
 ## 7d. Update System-Level Documentation
 
 If structural changes were made (new modules, removed modules, changed interfaces):
-1. Update `_docs/02_document/architecture.md` if architecture changed
+1. Update `_docs/02_document/architecture.md` if architecture changed — but **never edit the `## Architecture Vision` section**. That section is user-confirmed (plan Phase 2a.0 / document Step 4.5); if a refactor invalidates a vision principle, surface it to the user and let them update the vision themselves before continuing. Update only the technical sections below the Vision H2.
 2. Update `_docs/02_document/system-flows.md` if flow sequences changed
 3. Update `_docs/02_document/diagrams/components.md` if component relationships changed