diff --git a/agent.py b/agent.py
index 3feaf95..9afac87 100644
--- a/agent.py
+++ b/agent.py
@@ -134,19 +134,8 @@ class QuoteJudgeStudioV1(A2AAgent[QuoteJudgeStudioV1Config, PlatformUserAuth]):
         )
     )
 
-    @a2a.tool(
-        description="Compare two or more vendor quotes, persist the result for this platform user, and return the recommendation.",
-        timeout_seconds=30,
-        idempotent=True,
-        cost_class="deterministic",
-    )
-    async def compare_quotes(
-        self,
-        ctx: RunContext[PlatformUserAuth],
-        comparison_id: str,
-        quotes: list[QuoteInput],
-        weights: QuoteWeights,
-    ) -> dict[str, Any]:
+    @a2a.tool(description="Compare two or more vendor quotes, persist the result for this platform user, and return the recommendation.", timeout_seconds=30, idempotent=True, cost_class="deterministic")
+    async def compare_quotes(self, ctx: RunContext[PlatformUserAuth], comparison_id: str, quotes: list[QuoteInput], weights: QuoteWeights) -> dict[str, Any]:
         validation = _validate_request(comparison_id, quotes, weights)
         if validation is not None:
             await _persist_receipt_best_effort(ctx, "compare_quotes", comparison_id, "error", validation)
@@ -158,22 +147,13 @@ class QuoteJudgeStudioV1(A2AAgent[QuoteJudgeStudioV1Config, PlatformUserAuth]):
             await _persist_receipt_best_effort(ctx, "compare_quotes", comparison_id, "ok", result)
         except RuntimeError as exc:
             return _setup_required(comparison_id, str(exc))
-        except Exception:  # noqa: BLE001
+        except Exception:
             return _temporary_db_error(comparison_id)
         await ctx.emit_progress(f"saved comparison {comparison_id}")
         return result
 
-    @a2a.tool(
-        description="Reload a saved quote comparison for the current signed-in platform user.",
-        timeout_seconds=20,
-        idempotent=True,
-        cost_class="deterministic",
-    )
-    async def get_comparison(
-        self,
-        ctx: RunContext[PlatformUserAuth],
-        comparison_id: str,
-    ) -> dict[str, Any]:
+    @a2a.tool(description="Reload a saved quote comparison for the current signed-in platform user.", timeout_seconds=20, idempotent=True, cost_class="deterministic")
+    async def get_comparison(self, ctx: RunContext[PlatformUserAuth], comparison_id: str) -> dict[str, Any]:
         tenant = _tenant_key(ctx)
         clean_id = _clean_comparison_id(comparison_id)
         if clean_id is None:
@@ -183,76 +163,42 @@ class QuoteJudgeStudioV1(A2AAgent[QuoteJudgeStudioV1Config, PlatformUserAuth]):
             await _persist_receipt_best_effort(ctx, "get_comparison", clean_id, "ok", record or {"ok": False})
         except RuntimeError as exc:
             return _setup_required(clean_id, str(exc))
-        except Exception:  # noqa: BLE001
+        except Exception:
             return _temporary_db_error(clean_id)
         if record is None:
             return {"ok": False, "code": "comparison_not_found", "comparison_id": clean_id, "message": "No saved comparison exists for this user and id."}
         return record
 
-    @a2a.tool(
-        description="Compare quotes from an external client FileUpload (CSV, JSON, or plain text) and persist the result.",
-        timeout_seconds=30,
-        idempotent=True,
-        cost_class="deterministic",
-    )
+    @a2a.tool(description="Compare quotes from an external client FileUpload (CSV, JSON, or plain text) and persist the result.", timeout_seconds=30, idempotent=True, cost_class="deterministic")
     async def compare_quotes_file(
         self,
         ctx: RunContext[PlatformUserAuth],
         comparison_id: str,
         weights: QuoteWeights,
-        document: Annotated[
-            UploadedFile,
-            FileUpload(
-                accept=ALLOWED_UPLOAD_MEDIA_TYPES,
-                max_bytes=MAX_UPLOAD_BYTES,
-                description="CSV/JSON/text quote file with vendor, unit_price, quantity, delivery_days, warranty_months.",
-            ),
-        ],
+        document: Annotated[UploadedFile, FileUpload(accept=ALLOWED_UPLOAD_MEDIA_TYPES, max_bytes=MAX_UPLOAD_BYTES, description="CSV/JSON/text quote file with vendor, unit_price, quantity, delivery_days, warranty_months.")],
     ) -> dict[str, Any]:
         try:
             payload = ctx.workspace.read_bytes(document.path)  # type: ignore[attr-defined]
-        except Exception:  # noqa: BLE001
+        except Exception:
             return {"ok": False, "code": "upload_read_failed", "comparison_id": comparison_id, "message": "Could not read the uploaded file from the invocation workspace."}
         parsed = _parse_uploaded_quotes(document.filename, document.media_type, payload)
         if not parsed["ok"]:
             return {**parsed, "comparison_id": comparison_id}
         return await self.compare_quotes(ctx, comparison_id, parsed["quotes"], weights)
 
-    @a2a.tool(
-        description="Browser JSON bridge: accept one bounded base64 quote file, parse it, compare quotes, and persist the result.",
-        timeout_seconds=30,
-        idempotent=True,
-        cost_class="deterministic",
-    )
-    async def compare_quotes_upload(
-        self,
-        ctx: RunContext[PlatformUserAuth],
-        comparison_id: str,
-        upload: BrowserQuoteDocument,
-        weights: QuoteWeights,
-    ) -> dict[str, Any]:
+    @a2a.tool(description="Browser JSON bridge: accept one bounded base64 quote file, parse it, compare quotes, and persist the result.", timeout_seconds=30, idempotent=True, cost_class="deterministic")
+    async def compare_quotes_upload(self, ctx: RunContext[PlatformUserAuth], comparison_id: str, upload: BrowserQuoteDocument, weights: QuoteWeights) -> dict[str, Any]:
         return await self.compare_quotes_browser_upload(ctx, comparison_id, weights, [upload])
 
-    @a2a.tool(
-        description="Browser JSON bridge: accept bounded base64 quote files, parse them, compare quotes, and persist the result.",
-        timeout_seconds=30,
-        idempotent=True,
-        cost_class="deterministic",
-    )
-    async def compare_quotes_browser_upload(
-        self,
-        ctx: RunContext[PlatformUserAuth],
-        comparison_id: str,
-        weights: QuoteWeights,
-        documents: list[BrowserQuoteDocument],
-    ) -> dict[str, Any]:
+    @a2a.tool(description="Browser JSON bridge: accept bounded base64 quote files, parse them, compare quotes, and persist the result.", timeout_seconds=30, idempotent=True, cost_class="deterministic")
+    async def compare_quotes_browser_upload(self, ctx: RunContext[PlatformUserAuth], comparison_id: str, weights: QuoteWeights, documents: list[BrowserQuoteDocument]) -> dict[str, Any]:
         if not documents or len(documents) > MAX_BROWSER_UPLOADS:
             return {"ok": False, "code": "invalid_upload_count", "comparison_id": comparison_id, "message": f"Upload 1 to {MAX_BROWSER_UPLOADS} files."}
         all_quotes: list[QuoteInput] = []
         for document in documents:
             try:
                 data = base64.b64decode(document.data_base64, validate=True)
-            except Exception:  # noqa: BLE001
+            except Exception:
                 return {"ok": False, "code": "invalid_base64_upload", "comparison_id": comparison_id, "message": f"{document.filename} is not valid base64."}
             if len(data) > MAX_UPLOAD_BYTES:
                 return {"ok": False, "code": "upload_too_large", "comparison_id": comparison_id, "message": f"{document.filename} exceeds {MAX_UPLOAD_BYTES} bytes."}
@@ -308,7 +254,7 @@ def _score_quotes(comparison_id: str, quotes: list[QuoteInput], weights: QuoteWe
             "weighted_score": rounded_score,
             "score_breakdown": {"price": _round(price_score * 100), "delivery": _round(delivery_score * 100), "warranty": _round(warranty_score * 100)},
         })
-    ranked = sorted(scored, key=lambda row: (-row["score"], row["total_price"], row["delivery_days"], -row["warranty_months"], row["vendor"].lower()))
+    ranked = sorted(scored, key=_quote_sort_key)
     winner = ranked[0]
     result = {
         "ok": True,
@@ -334,6 +280,10 @@ def _score_quotes(comparison_id: str, quotes: list[QuoteInput], weights: QuoteWe
     return result
 
 
+def _quote_sort_key(row: dict[str, Any]) -> tuple[Any, ...]:
+    return (-row["score"], row["total_price"], row["delivery_days"], -row["warranty_months"], row["vendor"].lower())
+
+
 def _money(value: Any) -> float:
     return float(Decimal(str(value)).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP))
 
@@ -364,7 +314,7 @@ def _parse_uploaded_quotes(filename: str, media_type: str, data: bytes) -> dict[
             quotes = [QuoteInput.model_validate(row) for row in rows]
         else:
             quotes = _parse_csv_or_text(text)
-    except Exception as exc:  # noqa: BLE001
+    except Exception as exc:
         return {"ok": False, "code": "quote_parse_failed", "message": f"Could not parse quote upload: {str(exc)[:160]}"}
     return {"ok": True, "quotes": quotes}
 
@@ -376,7 +326,7 @@ def _parse_csv_or_text(text: str) -> list[QuoteInput]:
     reader = csv.DictReader(io.StringIO(sample))
     required = {"vendor", "unit_price", "quantity", "delivery_days", "warranty_months"}
     if reader.fieldnames and required.issubset({name.strip() for name in reader.fieldnames}):
-        return [QuoteInput.model_validate({k.strip(): v for k, v in row.items()}) for row in reader]
+        return [QuoteInput.model_validate({key.strip(): value for key, value in csv_row.items()}) for csv_row in reader]
     raise ValueError("CSV must include vendor, unit_price, quantity, delivery_days, warranty_months columns")
 
 
@@ -399,12 +349,7 @@ def _connect():
     import psycopg
     from psycopg.rows import dict_row
 
-    return psycopg.connect(
-        _database_url(),
-        connect_timeout=DB_CONNECT_TIMEOUT_SECONDS,
-        row_factory=dict_row,
-        options=f"-c statement_timeout={DB_STATEMENT_TIMEOUT_MS} -c lock_timeout={DB_LOCK_TIMEOUT_MS}",
-    )
+    return psycopg.connect(_database_url(), connect_timeout=DB_CONNECT_TIMEOUT_SECONDS, row_factory=dict_row, options=f"-c statement_timeout={DB_STATEMENT_TIMEOUT_MS} -c lock_timeout={DB_LOCK_TIMEOUT_MS}")
 
 
 async def _save_comparison(tenant_key: str, result: dict[str, Any]) -> None:
@@ -440,19 +385,11 @@ async def _load_comparison(tenant_key: str, comparison_id: str) -> dict[str, Any
 def _load_comparison_sync(tenant_key: str, comparison_id: str) -> dict[str, Any] | None:
     with _connect() as conn:
         with conn.cursor() as cur:
-            cur.execute(
-                """
-                SELECT result_json
-                  FROM quote_judge_comparisons
-                 WHERE tenant_key = %s AND comparison_id = %s
-                 LIMIT 1
-                """,
-                (tenant_key, comparison_id),
-            )
-            row = cur.fetchone()
-    if not row:
+            cur.execute("""SELECT result_json FROM quote_judge_comparisons WHERE tenant_key = %s AND comparison_id = %s LIMIT 1""", (tenant_key, comparison_id))
+            db_row = cur.fetchone()
+    if not db_row:
         return None
-    payload = row["result_json"]
+    payload = db_row["result_json"]
     return json.loads(payload) if isinstance(payload, str) else dict(payload)
 
 
@@ -462,7 +399,7 @@ async def _persist_receipt_best_effort(ctx: RunContext[PlatformUserAuth], skill_
         tenant = _tenant_key(ctx)
         receipt = _receipt_payload(skill_name, comparison_id, payload)
         await asyncio.to_thread(_persist_receipt_sync, tenant, comparison_id, skill_name, status, getattr(ctx, "task_id", "") or "", receipt)
-    except Exception:  # noqa: BLE001
+    except Exception:
         return