a2a-source-edit: write agent.py

agent.py

@@ -55,6 +55,12 @@ class QuoteJudgeStudioV1Config(BaseModel):
     """No user-configurable settings; all state is tenant-scoped by platform auth."""
 
 
+class QuoteJudgeDurableState(BaseModel):
+    """Marker state model: durable product state lives in managed Postgres."""
+
+    database: str = "quote-judge-studio-v1-data"
+
+
 class QuoteInput(BaseModel):
     vendor: str = Field(..., min_length=1, max_length=120)
     unit_price: float = Field(..., gt=0, le=1_000_000)
@@ -103,12 +109,13 @@ class QuoteJudgeStudioV1(A2AAgent[QuoteJudgeStudioV1Config, PlatformUserAuth]):
         "weights; persist results; reopen prior comparisons; accept browser "
         "base64 uploads and typed FileUpload inputs; and persist execution receipts."
     )
-    version = "0.1.1"
+    version = "0.1.2"
 
     config_model = QuoteJudgeStudioV1Config
     auth_model = PlatformUserAuth
 
     state = State.DURABLE
+    state_model = QuoteJudgeDurableState
     resources = Resources(cpu="500m", memory="512Mi", max_runtime_seconds=120)
     pricing = Pricing(
         price_per_call_usd=0.0,
@@ -251,7 +258,7 @@ class QuoteJudgeStudioV1(A2AAgent[QuoteJudgeStudioV1Config, PlatformUserAuth]):
             return _validation_result(comparison_id, issues)
         try:
             data = ctx.workspace.read_bytes(quote_file.path)  # concrete runtime clients expose this helper
-        except Exception as exc:  # noqa: BLE001
+        except Exception:  # noqa: BLE001
             return _validation_result(
                 comparison_id,
                 [ValidationIssue(code="upload_read_failed", message="The uploaded file could not be read from the invocation workspace.", field="quote_file", action=f"Re-upload the file and ensure it is below {MAX_BROWSER_UPLOAD_BYTES} bytes.")],