feat: AI coordination protocol and advanced audit operations

AI_RULES.md

@@ -7,6 +7,12 @@ Any AI or session MUST respect these mandatory rules.
 - **UI & Code Language**: All web interfaces, functions, variables, and any text inside the application MUST BE DIRECTLY AND ONLY IN ENGLISH.
 - **Communication Language**: Conversation with the user will be in Romanian or English, preferably Romanian.
 
+## Multi-AI Coordination & Handover
+- **MANDATORY STARTUP**: Every AI session MUST first read `dev_docs/SESSION_STATE.md` to understand current context.
+- **MANDATORY HANDOVER**: At the end of every task/session, create or update a handover note in `dev_docs/SESSION_STATE.md`. Specify: **Active AI**, **Current Status**, **Technical Context** (details not in code), and **Next Steps**.
+- **ARCHIVAL RULE**: To prevent `SESSION_STATE.md` from bloating, incoming AI agents MUST move all content of the *previous* session handover into the top of `dev_docs/SESSION_HISTORY.md` before writing their own new state. This keeps `SESSION_STATE.md` focused only on the *active* session.
+- **NO INTERACTION OVERLAP**: Never modify a file if another AI session is explicitly working on it according to `SESSION_STATE.md`.
+
 ## Implementation Completion
 - All code modifications MUST be committed in git before the task is considered finished. `VERSION.json` must be updated on EACH commit.
 - **MANDATORY GIT RULE:** Never push to remote unless explicitly requested by the user. Only commit locally with proper messages. Always assume the user will handle all `git push` operations. If a task requires pushing, ask for explicit permission first.

backend/routers/operations.py

@@ -60,3 +60,65 @@ def check_out_item(op: schemas.OperationCreate, db: Session = Depends(get_db)):
     db.commit()
     db.refresh(item)
     return item
+
+@router.post("/trash", response_model=schemas.Item)
+def trash_item(op: schemas.TrashOperationCreate, db: Session = Depends(get_db)):
+    if op.quantity <= 0:
+         raise HTTPException(status_code=400, detail="Quantity must be greater than zero")
+         
+    item = db.query(models.Item).filter(models.Item.barcode == op.barcode).first()
+    if not item:
+        raise HTTPException(status_code=404, detail="Item not found")
+        
+    if item.quantity < op.quantity:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Insufficient stock to trash")
+        
+    # Update quantity
+    item.quantity -= op.quantity
+        
+    # Create Mandatory Audit Log with TRASH action and reason
+    audit = models.AuditLog(
+        user_id=op.user_id,
+        action=f"TRASH: {op.reason}",
+        target_item_id=item.id,
+        quantity_change=-op.quantity
+    )
+    
+    db.add(audit)
+    db.commit()
+    db.refresh(item)
+    return item
+
+@router.post("/bulk-check-out")
+def bulk_check_out(bulk_op: schemas.BulkOperationCreate, db: Session = Depends(get_db)):
+    results = {"success": [], "errors": []}
+    
+    for op in bulk_op.items:
+        try:
+            item = db.query(models.Item).filter(models.Item.barcode == op.barcode).first()
+            if not item:
+                results["errors"].append({"barcode": op.barcode, "error": "Not found"})
+                continue
+                
+            if item.quantity < op.quantity:
+                results["errors"].append({"barcode": op.barcode, "error": f"Insufficient stock (Available: {item.quantity})"})
+                continue
+            
+            # Update quantity
+            item.quantity -= op.quantity
+            
+            # Log individual audit for this item
+            audit = models.AuditLog(
+                user_id=bulk_op.user_id,
+                action="BULK_CHECK_OUT",
+                target_item_id=item.id,
+                quantity_change=-op.quantity
+            )
+            db.add(audit)
+            results["success"].append({"barcode": op.barcode, "new_quantity": item.quantity})
+            
+        except Exception as e:
+            results["errors"].append({"barcode": op.barcode, "error": str(e)})
+            
+    db.commit()
+    return results

backend/schemas.py

@@ -27,6 +27,16 @@ class OperationCreate(BaseModel):
     quantity: float
     user_id: int
 
+class BulkOperationCreate(BaseModel):
+    user_id: int
+    items: List[OperationCreate]
+
+class TrashOperationCreate(BaseModel):
+    barcode: str
+    quantity: float
+    user_id: int
+    reason: Optional[str] = "unspecified"
+
 # --- Audit Logs ---
 class AuditLogResponse(BaseModel):
     id: int

dev_docs/ARCHIVE_LOGS.md

@@ -29,3 +29,14 @@ Each entry MUST be formatted chronologically.
 - `backend/routers/items.py` (NEW)
 - `backend/routers/operations.py` (NEW)
 - `backend/main.py` (UPDATED)
+
+### [2026-04-10 13:58] AI Coordination & Bulk Operations (Phase 3)
+**Purpose:** Established Multi-AI handover protocol with archival logic. Extended backend to support bulk check-outs and trash operations with mandatory audit logging.
+**Modified Files:**
+- `dev_docs/SESSION_STATE.md` (NEW)
+- `dev_docs/SESSION_HISTORY.md` (NEW)
+- `AI_RULES.md` (UPDATED)
+- `backend/schemas.py` (UPDATED)
+- `backend/routers/operations.py` (UPDATED)
+
+**Test Results:** Scheme support bulk and trash objects. Logging logic verified in code for session state compliance.

dev_docs/SESSION_HISTORY.md

@@ -0,0 +1,6 @@
+# AI Session History
+
+Archive of previous AI handover notes from `SESSION_STATE.md`.
+Entries are added here when a new AI session starts.
+
+---

dev_docs/SESSION_STATE.md

@@ -0,0 +1,17 @@
+# AI Session State
+
+**Status**: Active - Implementation of AI Coordination and Advanced Operations.
+**Current AI Agent**: Gemini (Antigravity)
+**Context**: 
+- Backend is initialized with FastAPI and SQLite.
+- Core Item and Operation routers are registered.
+- `AI_RULES.md` is initialized.
+
+**Specific Implementation Logic**:
+- Audit logging is central to all operations.
+- Using `html5-qrcode` for the PWA later.
+- Avoid native mobile apps, use PWA with service workers.
+
+**Handovers**:
+- Starting work on `trash` and `bulk-check-out` endpoints.
+- Coordination files being established.