perf(storage): 拦截任务二进制并本地暂存结果

原因：任务标准结果中的 Base64、Data URI 和 Buffer 会进入 PostgreSQL JSON，导致 TOAST 与备份体积快速增长。影响：新增统一 JSON 持久化关口；upload_none 将二进制原子写入本地结果目录，数据库仅保存带 SHA-256 的有界占位符；任务详情、同步响应、异步查询和兼容协议按需校验恢复。补充 24 小时清理、容量上限、历史小批量治理命令及管理端说明。风险：本地结果超过 TTL、丢失或损坏时分别返回明确的 410/500；空间不足时返回 503 且不重试上游。未自动执行历史治理。验证：三种真实图片模型同步/异步与幂等重放通过；Go vet/全量测试、前端 111 测试、lint/typecheck/build、OpenAPI、迁移安全、govulncheck、依赖审计、手工发布测试及 Linux amd64 构建通过。
2026-07-24 21:13:09 +08:00
parent 2457de6a56
commit 4f163ea6d7
31 changed files with 2067 additions and 30 deletions
@@ -80,6 +80,10 @@ AI_GATEWAY_TASK_RETENTION_DAYS=30
 AI_GATEWAY_TASK_ANALYSIS_RETENTION_DAYS=7
 AI_GATEWAY_TASK_CLEANUP_INTERVAL_SECONDS=300
 AI_GATEWAY_TASK_CLEANUP_BATCH_SIZE=1000
+AI_GATEWAY_LOCAL_RESULT_TTL_HOURS=24
+AI_GATEWAY_LOCAL_RESULT_MIN_FREE_BYTES=10737418240
+AI_GATEWAY_LOCAL_RESULT_MAX_BYTES=268435456
+AI_GATEWAY_LOCAL_RESULT_MAX_TASK_BYTES=536870912

 CORS_ALLOWED_ORIGIN=http://localhost:5178,http://127.0.0.1:5178
 VITE_GATEWAY_API_BASE_URL=http://localhost:8088
@@ -32,7 +32,8 @@ RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    cd apps/api && \
    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -trimpath -ldflags="-s -w" -o /out/easyai-ai-gateway ./cmd/gateway && \
-    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -trimpath -ldflags="-s -w" -o /out/easyai-ai-gateway-migrate ./cmd/migrate
+    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -trimpath -ldflags="-s -w" -o /out/easyai-ai-gateway-migrate ./cmd/migrate && \
+    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -trimpath -ldflags="-s -w" -o /out/easyai-ai-gateway-backfill-binary-results ./cmd/backfill-binary-results

 FROM ${API_RUNTIME_IMAGE} AS api

@@ -42,6 +43,7 @@ WORKDIR /app

 COPY --from=api-builder /out/easyai-ai-gateway /app/easyai-ai-gateway
 COPY --from=api-builder /out/easyai-ai-gateway-migrate /app/easyai-ai-gateway-migrate
+COPY --from=api-builder /out/easyai-ai-gateway-backfill-binary-results /app/easyai-ai-gateway-backfill-binary-results
 COPY apps/api/migrations /app/migrations

 RUN mkdir -p /app/data/static/generated /app/data/static/uploaded && \
@@ -0,0 +1,113 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"log/slog"
+	"os"
+	"time"
+
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/config"
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/runner"
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/store"
+)
+
+func main() {
+	apply := flag.Bool("apply", false, "persist compacted results; default is dry-run")
+	batchSize := flag.Int("batch-size", 100, "rows per batch, maximum 100")
+	maxBatches := flag.Int("max-batches", 10, "maximum batches for one invocation")
+	afterID := flag.String("after-id", "", "resume after this task UUID")
+	flag.Parse()
+
+	logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
+	cfg := config.Load()
+	if err := cfg.Validate(); err != nil {
+		logger.Error("invalid gateway configuration", "error", err)
+		os.Exit(1)
+	}
+	if *batchSize < 1 || *batchSize > 100 || *maxBatches < 1 {
+		logger.Error("invalid backfill bounds", "batchSize", *batchSize, "maxBatches", *maxBatches)
+		os.Exit(1)
+	}
+
+	ctx := context.Background()
+	db, err := store.Connect(ctx, cfg.DatabaseURL)
+	if err != nil {
+		logger.Error("connect postgres failed", "error", err)
+		os.Exit(1)
+	}
+	defer db.Close()
+
+	service := runner.New(cfg, db, logger)
+	cursor := *afterID
+	scanned := 0
+	matched := 0
+	updated := 0
+	expired := 0
+	for batch := 0; batch < *maxBatches; batch++ {
+		items, err := db.ListTaskBinaryResultBackfillBatch(ctx, cursor, *batchSize)
+		if err != nil {
+			logger.Error("list binary result backfill batch failed", "afterId", cursor, "error", err)
+			os.Exit(1)
+		}
+		if len(items) == 0 {
+			break
+		}
+		for _, item := range items {
+			cursor = item.ID
+			scanned++
+			if !runner.TaskResultHasInlineBinary(item.Result) {
+				continue
+			}
+			matched++
+			if !*apply {
+				continue
+			}
+			isExpired := item.FinishedAt.Before(time.Now().Add(-time.Duration(localResultTTLHours(cfg)) * time.Hour))
+			var persistent map[string]any
+			var changed bool
+			if isExpired {
+				persistent, changed, err = service.CompactExpiredTaskResultForStorage(ctx, item.ID, item.Result)
+			} else {
+				persistent, changed, err = service.MaterializeTaskResultForStorage(ctx, item.ID, item.Result)
+			}
+			if err != nil {
+				logger.Error("materialize historical binary result failed", "taskId", item.ID, "error", err)
+				os.Exit(1)
+			}
+			if !changed {
+				continue
+			}
+			ok, err := db.UpdateTaskBinaryResultBackfill(ctx, item.ID, persistent)
+			if err != nil {
+				logger.Error("update historical binary result failed", "taskId", item.ID, "error", err)
+				os.Exit(1)
+			}
+			if !ok {
+				continue
+			}
+			updated++
+			if isExpired {
+				expired++
+			}
+		}
+		if len(items) < *batchSize {
+			break
+		}
+	}
+	logger.Info("binary result backfill completed",
+		"apply", *apply,
+		"scanned", scanned,
+		"matched", matched,
+		"updated", updated,
+		"expired", expired,
+		"resumeAfterId", cursor,
+	)
+}
+
+func localResultTTLHours(cfg config.Config) int {
+	if cfg.LocalResultTTLHours <= 0 {
+		return 24
+	}
+	return cfg.LocalResultTTLHours
+}
@@ -4738,6 +4738,12 @@
                        "schema": {
                            "$ref": "#/definitions/httpapi.EasyAIGeneratedResponse"
                        }
+                    },
+                    "410": {
+                        "description": "Gone",
+                        "schema": {
+                            "$ref": "#/definitions/httpapi.EasyAIGeneratedResponse"
+                        }
                    }
                }
            }
@@ -5645,6 +5651,12 @@
                        "schema": {
                            "$ref": "#/definitions/httpapi.VolcesErrorEnvelope"
                        }
+                    },
+                    "410": {
+                        "description": "Gone",
+                        "schema": {
+                            "$ref": "#/definitions/httpapi.VolcesErrorEnvelope"
+                        }
                    }
                }
            },
@@ -6304,6 +6316,13 @@
                            "type": "object",
                            "additionalProperties": true
                        }
+                    },
+                    "410": {
+                        "description": "Gone",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": true
+                        }
                    }
                }
            }
@@ -6404,6 +6423,13 @@
                            "type": "object",
                            "additionalProperties": true
                        }
+                    },
+                    "410": {
+                        "description": "Gone",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": true
+                        }
                    }
                }
            },
@@ -7883,6 +7909,12 @@
                            "$ref": "#/definitions/httpapi.ErrorEnvelope"
                        }
                    },
+                    "410": {
+                        "description": "Gone",
+                        "schema": {
+                            "$ref": "#/definitions/httpapi.ErrorEnvelope"
+                        }
+                    },
                    "500": {
                        "description": "Internal Server Error",
                        "schema": {
@@ -8305,6 +8337,12 @@
                            "$ref": "#/definitions/httpapi.KelingCompatibleEnvelope"
                        }
                    },
+                    "410": {
+                        "description": "Gone",
+                        "schema": {
+                            "$ref": "#/definitions/httpapi.KelingCompatibleEnvelope"
+                        }
+                    },
                    "500": {
                        "description": "Internal Server Error",
                        "schema": {
@@ -8766,6 +8804,12 @@
                            "$ref": "#/definitions/httpapi.ErrorEnvelope"
                        }
                    },
+                    "410": {
+                        "description": "Gone",
+                        "schema": {
+                            "$ref": "#/definitions/httpapi.ErrorEnvelope"
+                        }
+                    },
                    "500": {
                        "description": "Internal Server Error",
                        "schema": {
@@ -6821,6 +6821,10 @@ paths:
          description: Not Found
          schema:
            $ref: '#/definitions/httpapi.EasyAIGeneratedResponse'
+        "410":
+          description: Gone
+          schema:
+            $ref: '#/definitions/httpapi.EasyAIGeneratedResponse'
      security:
      - BearerAuth: []
      summary: 查询 server-main EasyAIClient 兼容任务结果
@@ -7429,6 +7433,10 @@ paths:
          description: Not Found
          schema:
            $ref: '#/definitions/httpapi.VolcesErrorEnvelope'
+        "410":
+          description: Gone
+          schema:
+            $ref: '#/definitions/httpapi.VolcesErrorEnvelope'
      security:
      - BearerAuth: []
      summary: 查询火山内容生成任务
@@ -7829,6 +7837,11 @@ paths:
          schema:
            additionalProperties: true
            type: object
+        "410":
+          description: Gone
+          schema:
+            additionalProperties: true
+            type: object
      security:
      - BearerAuth: []
      summary: 查询可灵 V1 Omni 视频任务
@@ -7893,6 +7906,11 @@ paths:
          schema:
            additionalProperties: true
            type: object
+        "410":
+          description: Gone
+          schema:
+            additionalProperties: true
+            type: object
      security:
      - BearerAuth: []
      summary: 按 ID 查询可灵 API 2.0 任务
@@ -8852,6 +8870,10 @@ paths:
          description: Not Found
          schema:
            $ref: '#/definitions/httpapi.ErrorEnvelope'
+        "410":
+          description: Gone
+          schema:
+            $ref: '#/definitions/httpapi.ErrorEnvelope'
        "500":
          description: Internal Server Error
          schema:
@@ -9123,6 +9145,10 @@ paths:
          description: Not Found
          schema:
            $ref: '#/definitions/httpapi.KelingCompatibleEnvelope'
+        "410":
+          description: Gone
+          schema:
+            $ref: '#/definitions/httpapi.KelingCompatibleEnvelope'
        "500":
          description: Internal Server Error
          schema:
@@ -9421,6 +9447,10 @@ paths:
          description: Not Found
          schema:
            $ref: '#/definitions/httpapi.ErrorEnvelope'
+        "410":
+          description: Gone
+          schema:
+            $ref: '#/definitions/httpapi.ErrorEnvelope'
        "500":
          description: Internal Server Error
          schema:
@@ -39,6 +39,10 @@ type Config struct {
 	LocalGeneratedStorageDir                      string
 	LocalUploadedStorageDir                       string
 	LocalTempAssetTTLHours                        int
+	LocalResultTTLHours                           int
+	LocalResultMinFreeBytes                       int64
+	LocalResultMaxBytes                           int64
+	LocalResultMaxTaskBytes                       int64
 	TaskProgressCallbackEnabled                   bool
 	TaskProgressCallbackURL                       string
 	TaskProgressCallbackTimeoutMS                 int
@@ -88,6 +92,10 @@ func Load() Config {
 		LocalGeneratedStorageDir:                      env("AI_GATEWAY_GENERATED_STORAGE_DIR", env("LOCAL_GENERATED_STORAGE_DIR", env("AI_GATEWAY_STATIC_STORAGE_DIR", DefaultLocalGeneratedStorageDir))),
 		LocalUploadedStorageDir:                       env("AI_GATEWAY_UPLOADED_STORAGE_DIR", env("LOCAL_UPLOADED_STORAGE_DIR", DefaultLocalUploadedStorageDir)),
 		LocalTempAssetTTLHours:                        envInt("AI_GATEWAY_LOCAL_TEMP_ASSET_TTL_HOURS", 24),
+		LocalResultTTLHours:                           envIntValidated("AI_GATEWAY_LOCAL_RESULT_TTL_HOURS", 24),
+		LocalResultMinFreeBytes:                       envInt64Validated("AI_GATEWAY_LOCAL_RESULT_MIN_FREE_BYTES", 10*1024*1024*1024),
+		LocalResultMaxBytes:                           envInt64Validated("AI_GATEWAY_LOCAL_RESULT_MAX_BYTES", 256*1024*1024),
+		LocalResultMaxTaskBytes:                       envInt64Validated("AI_GATEWAY_LOCAL_RESULT_MAX_TASK_BYTES", 512*1024*1024),
 		TaskProgressCallbackEnabled:                   env("TASK_PROGRESS_CALLBACK_ENABLED", "true") == "true",
 		TaskProgressCallbackURL: env("TASK_PROGRESS_CALLBACK_URL",
 			strings.TrimRight(env("SERVER_MAIN_BASE_URL", "http://localhost:3000"), "/")+"/internal/platform/task-progress-callbacks",
@@ -139,6 +147,18 @@ func (c Config) Validate() error {
 	if c.TaskCleanupBatchSize != 0 && (c.TaskCleanupBatchSize < 100 || c.TaskCleanupBatchSize > 5000) {
 		return errors.New("AI_GATEWAY_TASK_CLEANUP_BATCH_SIZE must be between 100 and 5000")
 	}
+	if c.LocalResultTTLHours != 0 && (c.LocalResultTTLHours < 1 || c.LocalResultTTLHours > 24*30) {
+		return errors.New("AI_GATEWAY_LOCAL_RESULT_TTL_HOURS must be between 1 and 720")
+	}
+	if c.LocalResultMinFreeBytes < 0 {
+		return errors.New("AI_GATEWAY_LOCAL_RESULT_MIN_FREE_BYTES must not be negative")
+	}
+	if c.LocalResultMaxBytes != 0 && c.LocalResultMaxBytes < 1024 {
+		return errors.New("AI_GATEWAY_LOCAL_RESULT_MAX_BYTES must be at least 1024")
+	}
+	if c.LocalResultMaxTaskBytes != 0 && c.LocalResultMaxTaskBytes < c.LocalResultMaxBytes {
+		return errors.New("AI_GATEWAY_LOCAL_RESULT_MAX_TASK_BYTES must be at least AI_GATEWAY_LOCAL_RESULT_MAX_BYTES")
+	}
 	switch strings.ToLower(strings.TrimSpace(c.IdentitySecretStore)) {
 	case "":
 	case "file":
@@ -260,6 +280,18 @@ func envIntValidated(key string, fallback int) int {
 	return parsed
 }

+func envInt64Validated(key string, fallback int64) int64 {
+	value := envValue(key)
+	if value == "" {
+		return fallback
+	}
+	parsed, err := strconv.ParseInt(value, 10, 64)
+	if err != nil {
+		return 0
+	}
+	return parsed
+}
+
 func logLevel(value string) slog.Level {
 	switch strings.ToLower(value) {
 	case "debug":
@@ -0,0 +1,30 @@
+package httpapi
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/clients"
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/store"
+)
+
+func (s *Server) hydrateTaskResult(ctx context.Context, task store.GatewayTask) (store.GatewayTask, error) {
+	if task.Status != "succeeded" || len(task.Result) == 0 {
+		return task, nil
+	}
+	result, err := s.runner.HydrateTaskResult(ctx, task.ID, task.Result)
+	if err != nil {
+		return store.GatewayTask{}, err
+	}
+	task.Result = result
+	return task, nil
+}
+
+func writeStoredBinaryResultError(w http.ResponseWriter, err error) {
+	status := statusFromRunError(err)
+	code := clients.ErrorCode(err)
+	if code == "" {
+		code = "binary_result_corrupted"
+	}
+	writeError(w, status, err.Error(), code)
+}
@@ -170,6 +170,10 @@ func (s *Server) geminiGenerateContent(w http.ResponseWriter, r *http.Request) {
 			writeGeminiTaskError(http.StatusConflict, "Idempotency-Key was reused for a different request", nil, "idempotency_key_reused")
 			return
 		}
+		if errors.Is(err, store.ErrTaskRequestBinaryNotMaterialized) {
+			writeGeminiTaskError(http.StatusBadRequest, err.Error(), nil, clients.ErrorCode(err))
+			return
+		}
 		s.logger.Error("create gemini task failed", "kind", mapping.Kind, "error_category", "task_create_failed")
 		writeGeminiTaskError(http.StatusInternalServerError, "create task failed", nil, "task_create_failed")
 		return
@@ -184,6 +188,11 @@ func (s *Server) geminiGenerateContent(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		if task.Status == "succeeded" {
+			task, err = s.hydrateTaskResult(r.Context(), task)
+			if err != nil {
+				writeGeminiTaskError(statusFromRunError(err), err.Error(), nil, clients.ErrorCode(err))
+				return
+			}
 			if _, native := task.Result["candidates"]; native {
 				writeJSON(w, http.StatusOK, task.Result)
 				return
@@ -1134,6 +1134,10 @@ func (s *Server) createTask(kind string, compatible bool) http.Handler {
 				writeTaskError(http.StatusConflict, "Idempotency-Key was reused for a different request", nil, "idempotency_key_reused")
 				return
 			}
+			if errors.Is(err, store.ErrTaskRequestBinaryNotMaterialized) {
+				writeTaskError(http.StatusBadRequest, err.Error(), nil, clients.ErrorCode(err))
+				return
+			}
 			s.logger.Error("create task failed", "kind", kind, "error_category", "task_create_failed")
 			writeTaskError(http.StatusInternalServerError, "create task failed", nil, "task_create_failed")
 			return
@@ -1150,6 +1154,17 @@ func (s *Server) createTask(kind string, compatible bool) http.Handler {
 				writeTaskError(http.StatusConflict, "streaming idempotent replay is not supported", nil, "idempotency_stream_replay_unsupported")
 				return
 			}
+			if task.Status == "succeeded" && !responsePlan.asyncMode && (targetProtocol != "" || responsePlan.compatibleMode) {
+				task, err = s.hydrateTaskResult(r.Context(), task)
+				if err != nil {
+					if targetProtocol != "" {
+						writeProtocolError(w, targetProtocol, statusFromRunError(err), err.Error(), nil, clients.ErrorCode(err))
+					} else {
+						writeStoredBinaryResultError(w, err)
+					}
+					return
+				}
+			}
 			if targetProtocol != "" && !responsePlan.asyncMode {
 				if task.Status == "succeeded" {
 					writeJSON(w, http.StatusOK, task.Result)
@@ -1597,6 +1612,12 @@ func scopeForTaskKind(kind string) string {

 func statusFromRunError(err error) int {
 	switch {
+	case clients.ErrorCode(err) == "binary_result_expired":
+		return http.StatusGone
+	case clients.ErrorCode(err) == "binary_result_corrupted" || clients.ErrorCode(err) == "result_binary_not_materialized":
+		return http.StatusInternalServerError
+	case clients.ErrorCode(err) == "local_result_storage_unavailable":
+		return http.StatusServiceUnavailable
 	case clients.ErrorCode(err) == "billing_hold":
 		return http.StatusServiceUnavailable
 	case runner.IsPricingUnavailable(err):
@@ -1901,6 +1922,7 @@ func boolValue(body map[string]any, key string) bool {
 // @Success 200 {object} store.GatewayTask
 // @Failure 401 {object} ErrorEnvelope
 // @Failure 404 {object} ErrorEnvelope
+// @Failure 410 {object} ErrorEnvelope
 // @Failure 500 {object} ErrorEnvelope
 // @Router /api/workspace/tasks/{taskID} [get]
 // @Router /api/v1/tasks/{taskID} [get]
@@ -1920,6 +1942,11 @@ func (s *Server) getTask(w http.ResponseWriter, r *http.Request) {
 		task.Cancellable = &cancelState.Cancellable
 		task.Submitted = &cancelState.Submitted
 		task.Message = cancelState.Message
+		task, err = s.hydrateTaskResult(r.Context(), task)
+		if err != nil {
+			writeStoredBinaryResultError(w, err)
+			return
+		}
 		writeJSON(w, http.StatusOK, task)
 		return
 	}
@@ -177,6 +177,10 @@ func (s *Server) createKelingOmniVideo(w http.ResponseWriter, r *http.Request) {
 			writeKelingCompatError(w, requestID, kelingCompatGatewayError(staged.Err))
 			return
 		}
+		if errors.Is(createErr, store.ErrTaskRequestBinaryNotMaterialized) {
+			writeKelingCompatError(w, requestID, newKelingCompatError(http.StatusBadRequest, 1201, clients.ErrorCode(createErr)))
+			return
+		}
 		s.logger.Error("create Kling-compatible task failed", "error", createErr)
 		writeKelingCompatError(w, requestID, newKelingCompatError(http.StatusInternalServerError, 5000, "create task failed"))
 		return
@@ -221,6 +225,7 @@ func (s *Server) createKelingOmniVideo(w http.ResponseWriter, r *http.Request) {
 // @Failure 401 {object} KelingCompatibleEnvelope
 // @Failure 403 {object} KelingCompatibleEnvelope
 // @Failure 404 {object} KelingCompatibleEnvelope
+// @Failure 410 {object} KelingCompatibleEnvelope
 // @Failure 500 {object} KelingCompatibleEnvelope
 // @Router /api/v1/videos/omni-video/{taskID} [get]
 func (s *Server) getKelingOmniVideo(w http.ResponseWriter, r *http.Request) {
@@ -247,6 +252,11 @@ func (s *Server) getKelingOmniVideo(w http.ResponseWriter, r *http.Request) {
 		writeKelingCompatError(w, requestID, newKelingCompatError(http.StatusNotFound, 1203, "task not found"))
 		return
 	}
+	task, err = s.hydrateTaskResult(r.Context(), task)
+	if err != nil {
+		writeKelingCompatError(w, requestID, newKelingCompatError(statusFromRunError(err), 5000, clients.ErrorCode(err)))
+		return
+	}
 	writeJSON(w, http.StatusOK, KelingCompatibleEnvelope{
 		Code:      0,
 		Message:   "SUCCEED",
@@ -144,6 +144,8 @@ func (s *Server) createKlingCompatTask(w http.ResponseWriter, r *http.Request, v
 			writeKlingCompatError(w, http.StatusConflict, err.Error(), "idempotency_key_reused")
 		case errors.Is(err, store.ErrExternalTaskIDReused):
 			writeKlingCompatError(w, http.StatusConflict, err.Error(), "external_task_id_reused")
+		case errors.Is(err, store.ErrTaskRequestBinaryNotMaterialized):
+			writeKlingCompatError(w, http.StatusBadRequest, err.Error(), clients.ErrorCode(err))
 		default:
 			s.logger.Error("create Kling compatibility task failed", "version", version, "model", model, "error", err)
 			writeKlingCompatError(w, http.StatusInternalServerError, "create task failed", "task_create_failed")
@@ -464,6 +466,7 @@ func validateKlingCompatBody(model string, body map[string]any) error {
 // @Param taskID path string true "任务 ID"
 // @Success 200 {object} map[string]interface{}
 // @Failure 404 {object} map[string]interface{}
+// @Failure 410 {object} map[string]interface{}
 // @Router /api/v1/kling/v1/videos/omni-video/{taskID} [get]
 func (s *Server) klingV1GetOmniVideo(w http.ResponseWriter, r *http.Request) {
 	user, _ := auth.UserFromContext(r.Context())
@@ -476,6 +479,11 @@ func (s *Server) klingV1GetOmniVideo(w http.ResponseWriter, r *http.Request) {
 		writeKlingCompatError(w, http.StatusInternalServerError, "get task failed", "task_query_failed")
 		return
 	}
+	task, err = s.hydrateTaskResult(r.Context(), task)
+	if err != nil {
+		writeKlingCompatError(w, statusFromRunError(err), err.Error(), clients.ErrorCode(err))
+		return
+	}
 	writeJSON(w, http.StatusOK, klingV1Envelope(task))
 }

@@ -520,6 +528,7 @@ func (s *Server) klingV1ListOmniVideos(w http.ResponseWriter, r *http.Request) {
 // @Param task_ids query string false "逗号分隔的任务 ID"
 // @Param external_task_ids query string false "逗号分隔的外部任务 ID"
 // @Success 200 {object} map[string]interface{}
+// @Failure 410 {object} map[string]interface{}
 // @Router /api/v1/kling/v2/tasks [get]
 func (s *Server) klingV2GetTasks(w http.ResponseWriter, r *http.Request) {
 	user, _ := auth.UserFromContext(r.Context())
@@ -543,6 +552,11 @@ func (s *Server) klingV2GetTasks(w http.ResponseWriter, r *http.Request) {
 			writeKlingCompatError(w, http.StatusInternalServerError, "get task failed", "task_query_failed")
 			return
 		}
+		task, err = s.hydrateTaskResult(r.Context(), task)
+		if err != nil {
+			writeKlingCompatError(w, statusFromRunError(err), err.Error(), clients.ErrorCode(err))
+			return
+		}
 		data = append(data, klingV2TaskData(task))
 	}
 	writeJSON(w, http.StatusOK, map[string]any{"code": 0, "message": "success", "request_id": klingRequestIDFromAny(data), "data": data})
@@ -45,6 +45,58 @@ func (s *Server) cleanupExpiredLocalTempAssets(ctx context.Context, now time.Tim
 	for _, target := range targets {
 		deleted += s.cleanupExpiredLocalTempAssetsInDir(ctx, now, target)
 	}
+	deleted += s.cleanupExpiredLocalBinaryResults(now)
+	return deleted
+}
+
+func (s *Server) cleanupExpiredLocalBinaryResults(now time.Time) int {
+	storageDir := strings.TrimSpace(s.cfg.LocalGeneratedStorageDir)
+	if storageDir == "" {
+		storageDir = config.DefaultLocalGeneratedStorageDir
+	}
+	root := filepath.Join(storageDir, "results")
+	ttlHours := s.cfg.LocalResultTTLHours
+	if ttlHours <= 0 {
+		ttlHours = 24
+	}
+	expiredBefore := now.Add(-time.Duration(ttlHours) * time.Hour)
+	deleted := 0
+	var directories []string
+	err := filepath.WalkDir(root, func(path string, entry os.DirEntry, walkErr error) error {
+		if walkErr != nil {
+			if !errors.Is(walkErr, os.ErrNotExist) && s.logger != nil {
+				s.logger.Warn("walk local binary result failed", "path", path, "error", walkErr)
+			}
+			return nil
+		}
+		if entry.IsDir() {
+			if path != root {
+				directories = append(directories, path)
+			}
+			return nil
+		}
+		if entry.Type()&os.ModeSymlink != 0 {
+			return nil
+		}
+		info, infoErr := entry.Info()
+		if infoErr != nil || info.ModTime().After(expiredBefore) {
+			return nil
+		}
+		if removeErr := os.Remove(path); removeErr != nil && !errors.Is(removeErr, os.ErrNotExist) {
+			if s.logger != nil {
+				s.logger.Warn("remove local binary result failed", "path", path, "error", removeErr)
+			}
+			return nil
+		}
+		deleted++
+		return nil
+	})
+	if err != nil && !errors.Is(err, os.ErrNotExist) && s.logger != nil {
+		s.logger.Warn("scan local binary result root failed", "dir", root, "error", err)
+	}
+	for index := len(directories) - 1; index >= 0; index-- {
+		_ = os.Remove(directories[index])
+	}
 	return deleted
 }

@@ -11,6 +11,7 @@ import (
 	"net/http/httptest"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 	"time"

@@ -235,6 +236,47 @@ func TestCleanupExpiredLocalTempAssetsDeletesExpiredStaticFiles(t *testing.T) {
 	}
 }

+func TestCleanupExpiredLocalTempAssetsDeletesNestedBinaryResultsWithIndependentTTL(t *testing.T) {
+	generatedDir := t.TempDir()
+	taskDir := filepath.Join(generatedDir, "results", "task-123")
+	if err := os.MkdirAll(taskDir, 0o750); err != nil {
+		t.Fatalf("create local result fixture dir: %v", err)
+	}
+	oldResult := filepath.Join(taskDir, strings.Repeat("a", 64)+".bin")
+	freshResult := filepath.Join(taskDir, strings.Repeat("b", 64)+".bin")
+	for _, path := range []string{oldResult, freshResult} {
+		if err := os.WriteFile(path, []byte("asset"), 0o640); err != nil {
+			t.Fatalf("write fixture %s: %v", path, err)
+		}
+	}
+	now := time.Now()
+	if err := os.Chtimes(oldResult, now.Add(-25*time.Hour), now.Add(-25*time.Hour)); err != nil {
+		t.Fatalf("age old binary result: %v", err)
+	}
+	if err := os.Chtimes(freshResult, now.Add(-23*time.Hour), now.Add(-23*time.Hour)); err != nil {
+		t.Fatalf("age fresh binary result: %v", err)
+	}
+	server := &Server{
+		cfg: config.Config{
+			LocalGeneratedStorageDir: generatedDir,
+			LocalResultTTLHours:      24,
+		},
+		logger: slog.New(slog.NewTextHandler(io.Discard, nil)),
+	}
+
+	deleted := server.cleanupExpiredLocalTempAssets(context.Background(), now)
+
+	if deleted != 1 {
+		t.Fatalf("expected one expired binary result delete, got %d", deleted)
+	}
+	if _, err := os.Stat(oldResult); !os.IsNotExist(err) {
+		t.Fatalf("old binary result should be deleted, stat err=%v", err)
+	}
+	if _, err := os.Stat(freshResult); err != nil {
+		t.Fatalf("fresh binary result should remain: %v", err)
+	}
+}
+
 func TestRequestConversationKeyPriority(t *testing.T) {
 	request := httptest.NewRequest(http.MethodPost, "/api/v1/chat/completions", nil)
 	request.Header.Set("X-EasyAI-Conversation-ID", "from-header")
@@ -56,12 +56,19 @@ func (s *Server) createVolcesContentsGenerationTask(w http.ResponseWriter, r *ht
 // @Param taskID path string true "任务 ID"
 // @Success 200 {object} VolcesContentsGenerationTaskResponse
 // @Failure 404 {object} VolcesErrorEnvelope
+// @Failure 410 {object} VolcesErrorEnvelope
 // @Router /api/v1/contents/generations/tasks/{taskID} [get]
 func (s *Server) getVolcesContentsGenerationTask(w http.ResponseWriter, r *http.Request) {
 	task, ok := s.volcesCompatibleTaskForUser(w, r)
 	if !ok {
 		return
 	}
+	var err error
+	task, err = s.hydrateTaskResult(r.Context(), task)
+	if err != nil {
+		writeVolcesError(w, statusFromRunError(err), err.Error(), clients.ErrorCode(err))
+		return
+	}
 	writeJSON(w, http.StatusOK, volcesCompatibleTask(task))
 }

@@ -178,6 +185,7 @@ func (s *Server) createLegacyVolcesVideoGeneration(w http.ResponseWriter, r *htt
 // @Param taskID path string true "任务 ID"
 // @Success 200 {object} EasyAIGeneratedResponse
 // @Failure 404 {object} EasyAIGeneratedResponse
+// @Failure 410 {object} EasyAIGeneratedResponse
 // @Router /api/v1/ai/result/{taskID} [get]
 func (s *Server) getEasyAITaskResult(w http.ResponseWriter, r *http.Request) {
 	user, ok := auth.UserFromContext(r.Context())
@@ -199,6 +207,11 @@ func (s *Server) getEasyAITaskResult(w http.ResponseWriter, r *http.Request) {
 		writeEasyAIAsyncError(w, http.StatusNotFound, "task not found", nil, "not_found")
 		return
 	}
+	task, err = s.hydrateTaskResult(r.Context(), task)
+	if err != nil {
+		writeEasyAIAsyncError(w, statusFromRunError(err), err.Error(), nil, clients.ErrorCode(err))
+		return
+	}
 	writeJSON(w, http.StatusOK, easyAITaskResultResponse(task))
 }

@@ -408,6 +421,8 @@ func writeVolcesCompatibleTaskError(w http.ResponseWriter, err error) {
 		status = clientErr.StatusCode
 	} else if errors.As(err, &clientErr) {
 		status = http.StatusBadRequest
+	} else if errors.Is(err, store.ErrTaskRequestBinaryNotMaterialized) {
+		status = http.StatusBadRequest
 	}
 	if wire := clients.ErrorWireResponse(err); wireResponseMatches(wire, clients.ProtocolVolcesContents) {
 		writeWireResponse(w, wire)
@@ -0,0 +1,721 @@
+package runner
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/clients"
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/config"
+)
+
+const (
+	localBinaryResultDirName          = "results"
+	localBinaryPlaceholderPrefix      = "[GatewayBinary:v1;"
+	localBinaryGenericBase64MinLength = 4096
+	localBinaryMaxDepth               = 64
+	defaultLocalResultTTLHours        = 24
+	defaultLocalResultMinFreeBytes    = int64(10 * 1024 * 1024 * 1024)
+	defaultLocalResultMaxBytes        = int64(256 * 1024 * 1024)
+	defaultLocalResultMaxTaskBytes    = int64(512 * 1024 * 1024)
+)
+
+type localBinaryDescriptor struct {
+	Prefix      string
+	SHA256      string
+	Size        int64
+	ContentType string
+	Encoding    string
+}
+
+type localBinaryMaterializer struct {
+	service       *Service
+	taskDir       string
+	writeFiles    bool
+	enforceLimits bool
+	totalBytes    int64
+	seen          map[string]struct{}
+	createdFiles  []string
+}
+
+// materializeLocalBinaryResult replaces every inline binary value with a
+// bounded placeholder after atomically writing and verifying the bytes locally.
+func (s *Service) materializeLocalBinaryResult(ctx context.Context, taskID string, result map[string]any) (map[string]any, bool, error) {
+	if _, _, err := s.transformLocalBinaryResult(ctx, taskID, result, false, true); err != nil {
+		return nil, false, err
+	}
+	return s.transformLocalBinaryResult(ctx, taskID, result, true, true)
+}
+
+func (s *Service) transformLocalBinaryResult(ctx context.Context, taskID string, result map[string]any, writeFiles bool, enforceLimits bool) (map[string]any, bool, error) {
+	root := s.localBinaryResultRoot()
+	taskDir := filepath.Join(root, safeLocalBinaryTaskDir(taskID))
+	materializer := &localBinaryMaterializer{
+		service:       s,
+		taskDir:       taskDir,
+		writeFiles:    writeFiles,
+		enforceLimits: enforceLimits,
+		seen:          map[string]struct{}{},
+	}
+	next, changed, err := materializer.materializeValue(ctx, result, "", nil, 0)
+	if err != nil {
+		materializer.rollbackCreatedFiles()
+		return nil, false, err
+	}
+	mapped, ok := next.(map[string]any)
+	if !ok {
+		materializer.rollbackCreatedFiles()
+		return nil, false, &clients.ClientError{
+			Code:       "result_binary_not_materialized",
+			Message:    "generated result is not a JSON object",
+			StatusCode: 500,
+			Retryable:  false,
+		}
+	}
+	if changed && enforceLimits && !writeFiles {
+		if err := os.MkdirAll(root, 0o750); err != nil {
+			return nil, false, localBinaryStorageError(err)
+		}
+		if err := ensureLocalBinaryDiskHeadroom(root, materializer.totalBytes, s.localResultMinFreeBytes()); err != nil {
+			return nil, false, err
+		}
+	}
+	return mapped, changed, nil
+}
+
+// MaterializeTaskResultForStorage exposes the same verified materialization
+// path to the explicit historical maintenance command.
+func (s *Service) MaterializeTaskResultForStorage(ctx context.Context, taskID string, result map[string]any) (map[string]any, bool, error) {
+	return s.materializeLocalBinaryResult(ctx, taskID, result)
+}
+
+// CompactExpiredTaskResultForStorage computes the same deterministic
+// placeholders without creating files that are already outside the recovery
+// window.
+func (s *Service) CompactExpiredTaskResultForStorage(ctx context.Context, taskID string, result map[string]any) (map[string]any, bool, error) {
+	return s.transformLocalBinaryResult(ctx, taskID, result, false, false)
+}
+
+func TaskResultHasInlineBinary(result map[string]any) bool {
+	return localBinaryValueHasPayload(result, "", nil, 0)
+}
+
+func localBinaryValueHasPayload(value any, key string, siblings map[string]any, depth int) bool {
+	if depth >= localBinaryMaxDepth {
+		return false
+	}
+	switch typed := value.(type) {
+	case map[string]any:
+		if _, _, ok := localBufferObjectBytes(typed); ok {
+			return true
+		}
+		for childKey, child := range typed {
+			if localBinaryValueHasPayload(child, childKey, typed, depth+1) {
+				return true
+			}
+		}
+	case []any:
+		if localBinaryKey(key) {
+			if _, ok := bytesFromNumberArray(typed); ok {
+				return true
+			}
+		}
+		for _, child := range typed {
+			if localBinaryValueHasPayload(child, key, siblings, depth+1) {
+				return true
+			}
+		}
+	case []byte:
+		return len(typed) > 0
+	case string:
+		_, _, _, ok := localBinaryStringBytes(key, typed, siblings)
+		return ok
+	}
+	return false
+}
+
+func (m *localBinaryMaterializer) materializeValue(ctx context.Context, value any, key string, siblings map[string]any, depth int) (any, bool, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, false, err
+	}
+	if depth >= localBinaryMaxDepth {
+		return nil, false, &clients.ClientError{
+			Code:       "result_binary_not_materialized",
+			Message:    "generated result exceeds the maximum JSON depth",
+			StatusCode: 500,
+			Retryable:  false,
+		}
+	}
+	switch typed := value.(type) {
+	case map[string]any:
+		if payload, contentType, ok := localBufferObjectBytes(typed); ok {
+			return m.persistBinary(ctx, payload, contentType, "buffer")
+		}
+		next := make(map[string]any, len(typed))
+		changed := false
+		for childKey, childValue := range typed {
+			child, childChanged, err := m.materializeValue(ctx, childValue, childKey, typed, depth+1)
+			if err != nil {
+				return nil, false, err
+			}
+			next[childKey] = child
+			changed = changed || childChanged
+		}
+		if !changed {
+			return value, false, nil
+		}
+		return next, true, nil
+	case []any:
+		if localBinaryKey(key) {
+			if payload, ok := bytesFromNumberArray(typed); ok {
+				return m.persistBinary(ctx, payload, mediaContentTypeFromItem(siblings), "buffer")
+			}
+		}
+		next := make([]any, len(typed))
+		changed := false
+		for index, item := range typed {
+			child, childChanged, err := m.materializeValue(ctx, item, key, siblings, depth+1)
+			if err != nil {
+				return nil, false, err
+			}
+			next[index] = child
+			changed = changed || childChanged
+		}
+		if !changed {
+			return value, false, nil
+		}
+		return next, true, nil
+	case []byte:
+		if len(typed) == 0 {
+			return value, false, nil
+		}
+		return m.persistBinary(ctx, append([]byte(nil), typed...), mediaContentTypeFromItem(siblings), "buffer")
+	case string:
+		payload, contentType, encoding, ok := localBinaryStringBytes(key, typed, siblings)
+		if !ok {
+			return value, false, nil
+		}
+		return m.persistBinary(ctx, payload, contentType, encoding)
+	default:
+		return value, false, nil
+	}
+}
+
+func (m *localBinaryMaterializer) persistBinary(ctx context.Context, payload []byte, contentType string, encoding string) (any, bool, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, false, err
+	}
+	if len(payload) == 0 {
+		return nil, false, nil
+	}
+	size := int64(len(payload))
+	if m.enforceLimits && size > m.service.localResultMaxBytes() {
+		return nil, false, &clients.ClientError{
+			Code:       "binary_result_too_large",
+			Message:    "one generated binary result exceeds the local storage limit",
+			StatusCode: 502,
+			Retryable:  false,
+		}
+	}
+	digest := sha256.Sum256(payload)
+	digestHex := hex.EncodeToString(digest[:])
+	if _, exists := m.seen[digestHex]; !exists {
+		if m.enforceLimits && m.totalBytes+size > m.service.localResultMaxTaskBytes() {
+			return nil, false, &clients.ClientError{
+				Code:       "binary_result_too_large",
+				Message:    "generated binary results exceed the per-task local storage limit",
+				StatusCode: 502,
+				Retryable:  false,
+			}
+		}
+		if m.writeFiles {
+			created, err := m.service.writeLocalBinaryResult(m.taskDir, digestHex, payload)
+			if err != nil {
+				return nil, false, err
+			}
+			if created {
+				m.createdFiles = append(m.createdFiles, filepath.Join(m.taskDir, digestHex+".bin"))
+			}
+		}
+		m.seen[digestHex] = struct{}{}
+		m.totalBytes += size
+	}
+	descriptor := localBinaryDescriptor{
+		Prefix:      localBinaryPrefix(payload),
+		SHA256:      digestHex,
+		Size:        size,
+		ContentType: normalizedLocalBinaryContentType(contentType),
+		Encoding:    normalizedLocalBinaryEncoding(encoding),
+	}
+	return localBinaryPlaceholder(descriptor), true, nil
+}
+
+func (m *localBinaryMaterializer) rollbackCreatedFiles() {
+	for _, path := range m.createdFiles {
+		_ = os.Remove(path)
+	}
+	_ = os.Remove(m.taskDir)
+	m.createdFiles = nil
+}
+
+func (s *Service) writeLocalBinaryResult(taskDir string, digestHex string, payload []byte) (bool, error) {
+	if err := os.MkdirAll(taskDir, 0o750); err != nil {
+		return false, localBinaryStorageError(err)
+	}
+	targetPath := filepath.Join(taskDir, digestHex+".bin")
+	if info, err := os.Stat(targetPath); err == nil {
+		if !info.IsDir() && info.Size() == int64(len(payload)) {
+			if err := verifyLocalBinaryFile(targetPath, digestHex, int64(len(payload))); err == nil {
+				now := time.Now()
+				if err := os.Chtimes(targetPath, now, now); err != nil {
+					return false, localBinaryStorageError(err)
+				}
+				return false, nil
+			}
+		}
+		return false, &clients.ClientError{
+			Code:       "binary_result_corrupted",
+			Message:    "existing local result file does not match its content hash",
+			StatusCode: 500,
+			Retryable:  false,
+		}
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return false, localBinaryStorageError(err)
+	}
+	if err := ensureLocalBinaryDiskHeadroom(taskDir, int64(len(payload)), s.localResultMinFreeBytes()); err != nil {
+		return false, err
+	}
+	tempFile, err := os.CreateTemp(taskDir, ".gateway-result-*")
+	if err != nil {
+		return false, localBinaryStorageError(err)
+	}
+	tempPath := tempFile.Name()
+	cleanup := func() {
+		_ = tempFile.Close()
+		_ = os.Remove(tempPath)
+	}
+	if err := tempFile.Chmod(0o640); err != nil {
+		cleanup()
+		return false, localBinaryStorageError(err)
+	}
+	if _, err := tempFile.Write(payload); err != nil {
+		cleanup()
+		return false, localBinaryStorageError(err)
+	}
+	if err := tempFile.Sync(); err != nil {
+		cleanup()
+		return false, localBinaryStorageError(err)
+	}
+	if err := tempFile.Close(); err != nil {
+		_ = os.Remove(tempPath)
+		return false, localBinaryStorageError(err)
+	}
+	if err := os.Rename(tempPath, targetPath); err != nil {
+		_ = os.Remove(tempPath)
+		return false, localBinaryStorageError(err)
+	}
+	if err := verifyLocalBinaryFile(targetPath, digestHex, int64(len(payload))); err != nil {
+		_ = os.Remove(targetPath)
+		return false, err
+	}
+	return true, nil
+}
+
+func ensureLocalBinaryDiskHeadroom(path string, incomingBytes int64, minFreeBytes int64) error {
+	var stat syscall.Statfs_t
+	if err := syscall.Statfs(path, &stat); err != nil {
+		return localBinaryStorageError(err)
+	}
+	freeBytes := int64(stat.Bavail) * int64(stat.Bsize)
+	if freeBytes-incomingBytes < minFreeBytes {
+		return &clients.ClientError{
+			Code:       "local_result_storage_unavailable",
+			Message:    "local result storage does not have enough free space",
+			StatusCode: 503,
+			Retryable:  false,
+		}
+	}
+	return nil
+}
+
+func localBinaryStorageError(err error) error {
+	return &clients.ClientError{
+		Code:       "local_result_storage_unavailable",
+		Message:    "local result storage failed: " + err.Error(),
+		StatusCode: 503,
+		Retryable:  false,
+	}
+}
+
+func verifyLocalBinaryFile(path string, expectedHash string, expectedSize int64) error {
+	file, err := os.Open(path)
+	if err != nil {
+		return localBinaryStorageError(err)
+	}
+	defer file.Close()
+	hasher := sha256.New()
+	size, err := io.Copy(hasher, file)
+	if err != nil {
+		return localBinaryStorageError(err)
+	}
+	if size != expectedSize || hex.EncodeToString(hasher.Sum(nil)) != expectedHash {
+		return &clients.ClientError{
+			Code:       "binary_result_corrupted",
+			Message:    "local result file failed size or hash verification",
+			StatusCode: 500,
+			Retryable:  false,
+		}
+	}
+	return nil
+}
+
+// HydrateTaskResult restores placeholders from verified local files. It is only
+// used by result/detail/replay endpoints, never by task lists or callbacks.
+func (s *Service) HydrateTaskResult(ctx context.Context, taskID string, result map[string]any) (map[string]any, error) {
+	next, changed, err := s.hydrateLocalBinaryValue(ctx, taskID, result, 0)
+	if err != nil {
+		return nil, err
+	}
+	if !changed {
+		return result, nil
+	}
+	mapped, ok := next.(map[string]any)
+	if !ok {
+		return nil, &clients.ClientError{Code: "binary_result_corrupted", Message: "stored result is not a JSON object", StatusCode: 500}
+	}
+	return mapped, nil
+}
+
+func (s *Service) hydrateLocalBinaryValue(ctx context.Context, taskID string, value any, depth int) (any, bool, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, false, err
+	}
+	if depth >= localBinaryMaxDepth {
+		return nil, false, &clients.ClientError{Code: "binary_result_corrupted", Message: "stored result exceeds the maximum JSON depth", StatusCode: 500}
+	}
+	switch typed := value.(type) {
+	case map[string]any:
+		next := make(map[string]any, len(typed))
+		changed := false
+		for key, childValue := range typed {
+			child, childChanged, err := s.hydrateLocalBinaryValue(ctx, taskID, childValue, depth+1)
+			if err != nil {
+				return nil, false, err
+			}
+			next[key] = child
+			changed = changed || childChanged
+		}
+		if !changed {
+			return value, false, nil
+		}
+		return next, true, nil
+	case []any:
+		next := make([]any, len(typed))
+		changed := false
+		for index, childValue := range typed {
+			child, childChanged, err := s.hydrateLocalBinaryValue(ctx, taskID, childValue, depth+1)
+			if err != nil {
+				return nil, false, err
+			}
+			next[index] = child
+			changed = changed || childChanged
+		}
+		if !changed {
+			return value, false, nil
+		}
+		return next, true, nil
+	case string:
+		descriptor, ok := parseLocalBinaryPlaceholder(typed)
+		if !ok {
+			return value, false, nil
+		}
+		payload, err := s.readLocalBinaryResult(taskID, descriptor)
+		if err != nil {
+			return nil, false, err
+		}
+		encoded := base64.StdEncoding.EncodeToString(payload)
+		if descriptor.Encoding == "data-uri" {
+			return "data:" + descriptor.ContentType + ";base64," + encoded, true, nil
+		}
+		return encoded, true, nil
+	default:
+		return value, false, nil
+	}
+}
+
+func (s *Service) readLocalBinaryResult(taskID string, descriptor localBinaryDescriptor) ([]byte, error) {
+	path := filepath.Join(s.localBinaryResultRoot(), safeLocalBinaryTaskDir(taskID), descriptor.SHA256+".bin")
+	info, err := os.Stat(path)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return nil, &clients.ClientError{Code: "binary_result_expired", Message: "local binary result has expired", StatusCode: 410, Retryable: false}
+		}
+		return nil, localBinaryStorageError(err)
+	}
+	if info.IsDir() || info.Size() != descriptor.Size {
+		return nil, &clients.ClientError{Code: "binary_result_corrupted", Message: "local binary result has an invalid size", StatusCode: 500, Retryable: false}
+	}
+	if info.ModTime().Before(time.Now().Add(-time.Duration(s.localResultTTLHours()) * time.Hour)) {
+		return nil, &clients.ClientError{Code: "binary_result_expired", Message: "local binary result has expired", StatusCode: 410, Retryable: false}
+	}
+	payload, err := os.ReadFile(path)
+	if err != nil {
+		return nil, localBinaryStorageError(err)
+	}
+	digest := sha256.Sum256(payload)
+	if int64(len(payload)) != descriptor.Size || hex.EncodeToString(digest[:]) != descriptor.SHA256 {
+		return nil, &clients.ClientError{Code: "binary_result_corrupted", Message: "local binary result failed size or hash verification", StatusCode: 500, Retryable: false}
+	}
+	return payload, nil
+}
+
+func localBinaryStringBytes(key string, value string, siblings map[string]any) ([]byte, string, string, bool) {
+	raw := strings.TrimSpace(value)
+	if raw == "" || strings.HasPrefix(raw, localBinaryPlaceholderPrefix) {
+		return nil, "", "", false
+	}
+	if strings.HasPrefix(strings.ToLower(raw), "data:") {
+		contentType, encoded, ok, err := parseBase64DataURL(raw)
+		if err == nil && ok {
+			payload, decodeErr := decodeBase64Payload(encoded)
+			if decodeErr == nil && len(payload) > 0 {
+				return payload, contentType, "data-uri", true
+			}
+		}
+		return nil, "", "", false
+	}
+	strict := localBinaryKey(key)
+	if !strict && len(raw) < localBinaryGenericBase64MinLength {
+		return nil, "", "", false
+	}
+	payload, err := decodeBase64Payload(raw)
+	if err != nil || len(payload) == 0 {
+		return nil, "", "", false
+	}
+	return payload, firstNonEmptyString(mediaContentTypeFromItem(siblings), defaultContentTypeForRawMediaKey(key)), "raw", true
+}
+
+func localBufferObjectBytes(value map[string]any) ([]byte, string, bool) {
+	if normalizeLocalBinaryKey(stringFromAny(value["type"])) != "buffer" {
+		return nil, "", false
+	}
+	contentType := firstNonEmptyString(
+		stringFromAny(value["mime_type"]),
+		stringFromAny(value["mimeType"]),
+		stringFromAny(value["contentType"]),
+	)
+	switch data := value["data"].(type) {
+	case []byte:
+		if len(data) == 0 {
+			return nil, "", false
+		}
+		return append([]byte(nil), data...), contentType, true
+	case []any:
+		payload, ok := bytesFromNumberArray(data)
+		return payload, contentType, ok
+	default:
+		return nil, "", false
+	}
+}
+
+func localBinaryKey(key string) bool {
+	normalized := normalizeLocalBinaryKey(key)
+	return normalized == "b64" ||
+		normalized == "b64json" ||
+		normalized == "base64" ||
+		normalized == "buffer" ||
+		normalized == "bytes" ||
+		strings.Contains(normalized, "base64") ||
+		strings.Contains(normalized, "buffer") ||
+		strings.Contains(normalized, "binary") ||
+		strings.HasSuffix(normalized, "b64") ||
+		strings.HasSuffix(normalized, "bytes")
+}
+
+func normalizeLocalBinaryKey(value string) string {
+	return strings.Map(func(char rune) rune {
+		switch {
+		case char >= 'a' && char <= 'z':
+			return char
+		case char >= 'A' && char <= 'Z':
+			return char + ('a' - 'A')
+		case char >= '0' && char <= '9':
+			return char
+		default:
+			return -1
+		}
+	}, value)
+}
+
+func localBinaryPrefix(payload []byte) string {
+	prefix := base64.StdEncoding.EncodeToString(payload)
+	if len(prefix) > 16 {
+		prefix = prefix[:16]
+	}
+	return prefix
+}
+
+func normalizedLocalBinaryContentType(value string) string {
+	value = normalizeGeneratedContentType(value)
+	if value == "" || len(value) > 32 || !localBinaryContentTypeSafe(value) {
+		return "application/octet-stream"
+	}
+	return value
+}
+
+func localBinaryContentTypeSafe(value string) bool {
+	for _, char := range value {
+		switch {
+		case char >= 'a' && char <= 'z':
+		case char >= 'A' && char <= 'Z':
+		case char >= '0' && char <= '9':
+		case char == '/', char == '.', char == '+', char == '-':
+		default:
+			return false
+		}
+	}
+	return true
+}
+
+func normalizedLocalBinaryEncoding(value string) string {
+	switch strings.ToLower(strings.TrimSpace(value)) {
+	case "data-uri":
+		return "data-uri"
+	case "buffer":
+		return "buffer"
+	default:
+		return "raw"
+	}
+}
+
+func localBinaryPlaceholder(descriptor localBinaryDescriptor) string {
+	return fmt.Sprintf(
+		"[GatewayBinary:v1;prefix=%s;sha256=%s;bytes=%d;mime=%s;encoding=%s]",
+		descriptor.Prefix,
+		descriptor.SHA256,
+		descriptor.Size,
+		descriptor.ContentType,
+		descriptor.Encoding,
+	)
+}
+
+func parseLocalBinaryPlaceholder(value string) (localBinaryDescriptor, bool) {
+	if !strings.HasPrefix(value, localBinaryPlaceholderPrefix) || !strings.HasSuffix(value, "]") {
+		return localBinaryDescriptor{}, false
+	}
+	content := strings.TrimSuffix(strings.TrimPrefix(value, localBinaryPlaceholderPrefix), "]")
+	fields := map[string]string{}
+	for _, item := range strings.Split(content, ";") {
+		key, fieldValue, ok := strings.Cut(item, "=")
+		if !ok {
+			continue
+		}
+		fields[key] = fieldValue
+	}
+	size, err := strconv.ParseInt(fields["bytes"], 10, 64)
+	if err != nil || size <= 0 || len(fields["sha256"]) != sha256.Size*2 {
+		return localBinaryDescriptor{}, false
+	}
+	if _, err := hex.DecodeString(fields["sha256"]); err != nil {
+		return localBinaryDescriptor{}, false
+	}
+	descriptor := localBinaryDescriptor{
+		Prefix:      fields["prefix"],
+		SHA256:      strings.ToLower(fields["sha256"]),
+		Size:        size,
+		ContentType: normalizedLocalBinaryContentType(fields["mime"]),
+		Encoding:    normalizedLocalBinaryEncoding(fields["encoding"]),
+	}
+	if len(descriptor.Prefix) > 16 {
+		return localBinaryDescriptor{}, false
+	}
+	return descriptor, true
+}
+
+func localBinaryResultHasPlaceholders(value any) bool {
+	switch typed := value.(type) {
+	case map[string]any:
+		for _, child := range typed {
+			if localBinaryResultHasPlaceholders(child) {
+				return true
+			}
+		}
+	case []any:
+		for _, child := range typed {
+			if localBinaryResultHasPlaceholders(child) {
+				return true
+			}
+		}
+	case string:
+		return strings.HasPrefix(typed, localBinaryPlaceholderPrefix)
+	}
+	return false
+}
+
+func safeLocalBinaryTaskDir(taskID string) string {
+	taskID = strings.TrimSpace(taskID)
+	if taskID != "" {
+		safe := true
+		for _, char := range taskID {
+			if (char >= 'a' && char <= 'z') ||
+				(char >= 'A' && char <= 'Z') ||
+				(char >= '0' && char <= '9') ||
+				char == '-' || char == '_' {
+				continue
+			}
+			safe = false
+			break
+		}
+		if safe && taskID != "." && taskID != ".." && len(taskID) <= 128 {
+			return taskID
+		}
+	}
+	digest := sha256.Sum256([]byte(taskID))
+	return "task-" + hex.EncodeToString(digest[:16])
+}
+
+func (s *Service) localBinaryResultRoot() string {
+	root := strings.TrimSpace(s.cfg.LocalGeneratedStorageDir)
+	if root == "" {
+		root = config.DefaultLocalGeneratedStorageDir
+	}
+	return filepath.Join(root, localBinaryResultDirName)
+}
+
+func (s *Service) localResultTTLHours() int {
+	if s.cfg.LocalResultTTLHours <= 0 {
+		return defaultLocalResultTTLHours
+	}
+	return s.cfg.LocalResultTTLHours
+}
+
+func (s *Service) localResultMinFreeBytes() int64 {
+	if s.cfg.LocalResultMinFreeBytes <= 0 {
+		return defaultLocalResultMinFreeBytes
+	}
+	return s.cfg.LocalResultMinFreeBytes
+}
+
+func (s *Service) localResultMaxBytes() int64 {
+	if s.cfg.LocalResultMaxBytes <= 0 {
+		return defaultLocalResultMaxBytes
+	}
+	return s.cfg.LocalResultMaxBytes
+}
+
+func (s *Service) localResultMaxTaskBytes() int64 {
+	if s.cfg.LocalResultMaxTaskBytes <= 0 {
+		return defaultLocalResultMaxTaskBytes
+	}
+	return s.cfg.LocalResultMaxTaskBytes
+}
@@ -0,0 +1,233 @@
+package runner
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/clients"
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/config"
+	"github.com/easyai/easyai-ai-gateway/apps/api/internal/store"
+)
+
+func newLocalBinaryTestService(t *testing.T) *Service {
+	t.Helper()
+	return &Service{cfg: config.Config{
+		LocalGeneratedStorageDir: t.TempDir(),
+		LocalResultTTLHours:      24,
+		LocalResultMinFreeBytes:  1,
+		LocalResultMaxBytes:      1024 * 1024,
+		LocalResultMaxTaskBytes:  2 * 1024 * 1024,
+	}}
+}
+
+func TestMaterializeAndHydrateLocalBinaryResult(t *testing.T) {
+	service := newLocalBinaryTestService(t)
+	payload := []byte("one binary result shared across representations")
+	encoded := base64.StdEncoding.EncodeToString(payload)
+	input := map[string]any{
+		"data": []any{
+			map[string]any{
+				"b64_json": encoded,
+				"data_uri": "data:image/png;base64," + encoded,
+				"buffer": map[string]any{
+					"type":     "Buffer",
+					"data":     bytesToAny(payload),
+					"mimeType": "image/png",
+				},
+			},
+		},
+	}
+
+	persistent, changed, err := service.materializeLocalBinaryResult(context.Background(), "task-123", input)
+	if err != nil {
+		t.Fatalf("materialize local binary result: %v", err)
+	}
+	if !changed {
+		t.Fatal("expected binary result to be materialized")
+	}
+	item := persistent["data"].([]any)[0].(map[string]any)
+	for _, key := range []string{"b64_json", "data_uri", "buffer"} {
+		placeholder, ok := item[key].(string)
+		if !ok || !strings.HasPrefix(placeholder, localBinaryPlaceholderPrefix) {
+			t.Fatalf("%s was not replaced with a placeholder: %+v", key, item[key])
+		}
+		if len(placeholder) > 200 {
+			t.Fatalf("%s placeholder exceeds 200 bytes: %d", key, len(placeholder))
+		}
+	}
+	if input["data"].([]any)[0].(map[string]any)["b64_json"] != encoded {
+		t.Fatal("materializer mutated the provider result")
+	}
+	persistentJSON, err := json.Marshal(persistent)
+	if err != nil {
+		t.Fatalf("marshal persistent result: %v", err)
+	}
+	if len(persistentJSON) > 32*1024 {
+		t.Fatalf("binary-only persistent result exceeds 32KiB: %d", len(persistentJSON))
+	}
+
+	taskDir := filepath.Join(service.localBinaryResultRoot(), "task-123")
+	entries, err := os.ReadDir(taskDir)
+	if err != nil {
+		t.Fatalf("read local result dir: %v", err)
+	}
+	if len(entries) != 1 {
+		t.Fatalf("same payload should reuse one local file, got %d", len(entries))
+	}
+	taskInfo, err := os.Stat(taskDir)
+	if err != nil {
+		t.Fatalf("stat task directory: %v", err)
+	}
+	if taskInfo.Mode().Perm() != 0o750 {
+		t.Fatalf("task directory mode = %v, want 0750", taskInfo.Mode().Perm())
+	}
+	fileInfo, err := entries[0].Info()
+	if err != nil {
+		t.Fatalf("stat result file: %v", err)
+	}
+	if fileInfo.Mode().Perm() != 0o640 {
+		t.Fatalf("result file mode = %v, want 0640", fileInfo.Mode().Perm())
+	}
+
+	wire, err := service.HydrateTaskResult(context.Background(), "task-123", persistent)
+	if err != nil {
+		t.Fatalf("hydrate local binary result: %v", err)
+	}
+	wireItem := wire["data"].([]any)[0].(map[string]any)
+	if wireItem["b64_json"] != encoded {
+		t.Fatalf("raw Base64 mismatch: got %v", wireItem["b64_json"])
+	}
+	if wireItem["data_uri"] != "data:image/png;base64,"+encoded {
+		t.Fatalf("data URI mismatch: got %v", wireItem["data_uri"])
+	}
+	if wireItem["buffer"] != encoded {
+		t.Fatalf("Buffer should hydrate as Base64: got %v", wireItem["buffer"])
+	}
+}
+
+func TestHydrateLocalBinaryResultReturnsExpiredAndCorruptedErrors(t *testing.T) {
+	service := newLocalBinaryTestService(t)
+	service.cfg.LocalResultTTLHours = 1
+	encoded := base64.StdEncoding.EncodeToString([]byte("expiring result"))
+	persistent, _, err := service.materializeLocalBinaryResult(context.Background(), "task-expired", map[string]any{"b64_json": encoded})
+	if err != nil {
+		t.Fatalf("materialize fixture: %v", err)
+	}
+	entries, err := os.ReadDir(filepath.Join(service.localBinaryResultRoot(), "task-expired"))
+	if err != nil || len(entries) != 1 {
+		t.Fatalf("read fixture result: entries=%v err=%v", entries, err)
+	}
+	path := filepath.Join(service.localBinaryResultRoot(), "task-expired", entries[0].Name())
+	old := time.Now().Add(-2 * time.Hour)
+	if err := os.Chtimes(path, old, old); err != nil {
+		t.Fatalf("age fixture: %v", err)
+	}
+	_, err = service.HydrateTaskResult(context.Background(), "task-expired", persistent)
+	assertClientErrorCode(t, err, "binary_result_expired")
+
+	now := time.Now()
+	if err := os.Chtimes(path, now, now); err != nil {
+		t.Fatalf("refresh fixture: %v", err)
+	}
+	if err := os.WriteFile(path, []byte("tampered"), 0o640); err != nil {
+		t.Fatalf("tamper fixture: %v", err)
+	}
+	_, err = service.HydrateTaskResult(context.Background(), "task-expired", persistent)
+	assertClientErrorCode(t, err, "binary_result_corrupted")
+}
+
+func TestMaterializeLocalBinaryResultEnforcesLimitsAndKeepsText(t *testing.T) {
+	service := newLocalBinaryTestService(t)
+	service.cfg.LocalResultMaxBytes = 4
+	_, _, err := service.materializeLocalBinaryResult(context.Background(), "task-large", map[string]any{
+		"b64_json": base64.StdEncoding.EncodeToString([]byte("too large")),
+	})
+	assertClientErrorCode(t, err, "binary_result_too_large")
+
+	persistent, changed, err := service.materializeLocalBinaryResult(context.Background(), "task-text", map[string]any{
+		"message": "YWJjZA==",
+	})
+	if err != nil || changed || persistent["message"] != "YWJjZA==" {
+		t.Fatalf("short Base64-like text should remain unchanged: result=%+v changed=%v err=%v", persistent, changed, err)
+	}
+
+	service = newLocalBinaryTestService(t)
+	service.cfg.LocalResultMaxBytes = 1024
+	service.cfg.LocalResultMaxTaskBytes = 8
+	_, _, err = service.materializeLocalBinaryResult(context.Background(), "task-total-large", map[string]any{
+		"first_base64":  base64.StdEncoding.EncodeToString([]byte("12345")),
+		"second_base64": base64.StdEncoding.EncodeToString([]byte("67890")),
+	})
+	assertClientErrorCode(t, err, "binary_result_too_large")
+	if _, statErr := os.Stat(filepath.Join(service.localBinaryResultRoot(), "task-total-large")); !errors.Is(statErr, os.ErrNotExist) {
+		t.Fatalf("preflight task limit must not create partial files: %v", statErr)
+	}
+}
+
+func TestCompactExpiredTaskResultDoesNotWriteFiles(t *testing.T) {
+	service := newLocalBinaryTestService(t)
+	service.cfg.LocalResultMaxBytes = 1
+	encoded := base64.StdEncoding.EncodeToString([]byte("already expired result"))
+
+	persistent, changed, err := service.CompactExpiredTaskResultForStorage(context.Background(), "task-old", map[string]any{
+		"b64_json": encoded,
+	})
+	if err != nil {
+		t.Fatalf("compact expired result: %v", err)
+	}
+	if !changed || !localBinaryResultHasPlaceholders(persistent) {
+		t.Fatalf("expired result was not compacted: %+v", persistent)
+	}
+	if _, err := os.Stat(filepath.Join(service.localBinaryResultRoot(), "task-old")); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("expired compaction must not create a task directory: %v", err)
+	}
+	_, err = service.HydrateTaskResult(context.Background(), "task-old", persistent)
+	assertClientErrorCode(t, err, "binary_result_expired")
+}
+
+func TestLocalBinaryStorageUnavailableDoesNotRetryProvider(t *testing.T) {
+	err := localBinaryStorageError(errors.New("write failed"))
+	assertClientErrorCode(t, err, "local_result_storage_unavailable")
+	if clients.IsRetryable(err) {
+		t.Fatal("local result storage failure must not call the provider again")
+	}
+	if retryDecisionForCandidate(store.RuntimeModelCandidate{}, err).Retry {
+		t.Fatal("local result storage failure must not retry the same provider client")
+	}
+	if failoverDecisionForCandidate(store.RunnerPolicy{}, store.RuntimeModelCandidate{}, err).Retry {
+		t.Fatal("local result storage failure must not fail over to another provider")
+	}
+
+	service := newLocalBinaryTestService(t)
+	service.cfg.LocalResultMinFreeBytes = 1 << 62
+	_, _, err = service.materializeLocalBinaryResult(context.Background(), "task-low-disk", map[string]any{
+		"b64_json": base64.StdEncoding.EncodeToString([]byte("disk preflight")),
+	})
+	assertClientErrorCode(t, err, "local_result_storage_unavailable")
+	if _, statErr := os.Stat(filepath.Join(service.localBinaryResultRoot(), "task-low-disk")); !errors.Is(statErr, os.ErrNotExist) {
+		t.Fatalf("disk preflight must not create partial task files: %v", statErr)
+	}
+}
+
+func bytesToAny(payload []byte) []any {
+	result := make([]any, len(payload))
+	for index, value := range payload {
+		result[index] = float64(value)
+	}
+	return result
+}
+
+func assertClientErrorCode(t *testing.T, err error, code string) {
+	t.Helper()
+	var clientErr *clients.ClientError
+	if !errors.As(err, &clientErr) || clientErr.Code != code {
+		t.Fatalf("error = %v, want client error code %s", err, code)
+	}
+}
@@ -57,6 +57,9 @@ func shouldRetrySameClient(candidate store.RuntimeModelCandidate, err error) boo
 func retryDecisionForCandidate(candidate store.RuntimeModelCandidate, err error) retryDecision {
 	policy := effectiveRetryPolicy(candidate)
 	info := failureInfoFromError(err)
+	if isResultPersistenceFailure(err) {
+		return retryDecision{Retry: false, Reason: "result_persistence_failed", Match: policyRuleMatch{Source: "gateway_result_storage", Policy: "persistence", Rule: "providerRetry", Value: "disabled"}, Info: info}
+	}
 	if errors.Is(err, store.ErrRateLimited) {
 		return retryDecision{Retry: false, Reason: "local_rate_limit_wait_queue", Match: policyRuleMatch{Source: "gateway_rate_limits", Policy: "rateLimitPolicy", Rule: "localCapacity", Value: "exceeded"}, Info: info}
 	}
@@ -77,6 +80,9 @@ func retryDecisionForCandidate(candidate store.RuntimeModelCandidate, err error)

 func failoverDecisionForCandidate(runnerPolicy store.RunnerPolicy, candidate store.RuntimeModelCandidate, err error) failoverDecision {
 	info := failureInfoFromError(err)
+	if isResultPersistenceFailure(err) {
+		return failoverDecision{Retry: false, Action: "stop", Reason: "result_persistence_failed", Match: policyRuleMatch{Source: "gateway_result_storage", Policy: "persistence", Rule: "providerFailover", Value: "disabled"}, Info: info}
+	}
 	if strings.TrimSpace(runnerPolicy.Status) != "" && runnerPolicy.Status != "active" {
 		return failoverDecision{Retry: false, Action: "stop", Reason: "runner_policy_disabled", Match: policyRuleMatch{Source: "gateway_runner_policies", Policy: "runnerPolicy", Rule: "status", Value: runnerPolicy.Status}, Info: info}
 	}
@@ -126,6 +132,9 @@ func shouldDemoteCandidatePriority(runnerPolicy store.RunnerPolicy, err error) b

 func priorityDemoteDecisionForCandidate(runnerPolicy store.RunnerPolicy, err error) priorityDemoteDecision {
 	info := failureInfoFromError(err)
+	if isResultPersistenceFailure(err) {
+		return priorityDemoteDecision{Demote: false, Reason: "result_persistence_failed", Info: info}
+	}
 	if strings.TrimSpace(runnerPolicy.Status) != "" && runnerPolicy.Status != "active" {
 		return priorityDemoteDecision{Demote: false, Reason: "runner_policy_disabled", Info: info}
 	}
@@ -145,6 +154,19 @@ func priorityDemoteDecisionForCandidate(runnerPolicy store.RunnerPolicy, err err
 	return priorityDemoteDecision{Demote: false, Reason: "priority_demote_no_match", Info: info}
 }

+func isResultPersistenceFailure(err error) bool {
+	switch strings.ToLower(strings.TrimSpace(clients.ErrorCode(err))) {
+	case "local_result_storage_unavailable",
+		"binary_result_too_large",
+		"binary_result_corrupted",
+		"binary_result_expired",
+		"result_binary_not_materialized":
+		return true
+	default:
+		return false
+	}
+}
+
 func effectiveFailoverPolicy(base map[string]any, override map[string]any) map[string]any {
 	policy := base
 	if nested := failoverOverridePolicy(override); len(nested) > 0 {
@@ -630,7 +630,11 @@ candidatesLoop:
 						}
 						walletReservationFinalized = true
 						s.logger.Warn("task succeeded but billing requires manual review", "taskID", task.ID, "error_category", "billing_calculation_failed")
-						return Result{Task: review, Output: response.Result, Wire: response.Wire}, nil
+						output, hydrateErr := s.HydrateTaskResult(ctx, task.ID, response.Result)
+						if hydrateErr != nil {
+							return Result{Task: review}, hydrateErr
+						}
+						return Result{Task: review, Output: output, Wire: response.Wire}, nil
 					}
 					finalAmountText = finalAmount.String()
 				} else {
@@ -661,6 +665,38 @@ candidatesLoop:
 					ResponseDurationMS:    record.ResponseDurationMS,
 				})
 				if finishErr != nil {
+					if errors.Is(finishErr, store.ErrTaskResultBinaryNotMaterialized) {
+						s.logger.Error("task result rejected by binary persistence guard",
+							"taskID", task.ID,
+							"error_category", "result_binary_not_materialized",
+						)
+						failureCtx := context.WithoutCancel(ctx)
+						_ = s.store.FinishTaskAttempt(failureCtx, store.FinishTaskAttemptInput{
+							AttemptID:          response.AttemptID,
+							Status:             "failed",
+							Retryable:          false,
+							RequestID:          response.RequestID,
+							ResponseStartedAt:  response.ResponseStartedAt,
+							ResponseFinishedAt: response.ResponseFinishedAt,
+							ResponseDurationMS: response.ResponseDurationMS,
+							ErrorCode:          clients.ErrorCode(finishErr),
+							ErrorMessage:       finishErr.Error(),
+						})
+						failed, failErr := s.failTask(
+							failureCtx,
+							task.ID,
+							task.ExecutionToken,
+							clients.ErrorCode(finishErr),
+							finishErr.Error(),
+							isSimulation(task, candidate),
+							finishErr,
+						)
+						if failErr != nil {
+							return Result{}, failErr
+						}
+						walletReservationFinalized = true
+						return Result{Task: failed, Output: failed.Result}, finishErr
+					}
 					if errors.Is(finishErr, store.ErrTaskExecutionLeaseLost) {
 						latest, latestErr := s.store.GetTask(ctx, task.ID)
 						if latestErr == nil && latest.Status == "cancelled" {
@@ -688,7 +724,11 @@ candidatesLoop:
 				}, isSimulation(task, candidate)); err != nil {
 					return Result{}, err
 				}
-				return Result{Task: finished, Output: response.Result, Wire: response.Wire}, nil
+				output, hydrateErr := s.HydrateTaskResult(ctx, task.ID, response.Result)
+				if hydrateErr != nil {
+					return Result{Task: finished}, hydrateErr
+				}
+				return Result{Task: finished, Output: output, Wire: response.Wire}, nil
 			}
 			var submissionUnknown *upstreamSubmissionUnknownError
 			if errors.As(err, &submissionUnknown) {
@@ -811,7 +851,7 @@ candidatesLoop:
 			break
 		}
 		decision := failoverDecisionForCandidate(runnerPolicy, candidate, candidateErr)
-		if !decision.Retry && hasLoadAvoidanceFallback(candidates, index, maxPlatforms) {
+		if !decision.Retry && !isResultPersistenceFailure(candidateErr) && hasLoadAvoidanceFallback(candidates, index, maxPlatforms) {
 			decision = loadAvoidanceFallbackDecision(candidateErr)
 		}
 		s.recordAttemptTrace(ctx, task.ID, attemptNo, failoverTraceEntry(decision, candidate))
@@ -1216,6 +1256,12 @@ func (s *Service) runCandidate(ctx context.Context, task store.GatewayTask, user
 		return clients.Response{}, err
 	}
 	response.Result = uploadedResult
+	if localBinaryResultHasPlaceholders(response.Result) {
+		// A provider wire response can still contain its original Base64 body.
+		// Force protocol responses to be rebuilt from the verified standard
+		// result instead of bypassing local result materialization.
+		response.Wire = nil
+	}
 	if task.Kind == "responses" {
 		response.UpstreamProtocol = candidate.ResponseProtocol
 		response.ParentResponseID = responseExecution.PublicPreviousResponseID
@@ -47,6 +47,7 @@ type generatedAssetUploadPolicy struct {
 	UploadInlineMedia   bool
 	UploadURLMedia      bool
 	PreserveInlineMedia bool
+	LocalizeInlineMedia bool
 }

 type generatedAssetDecision struct {
@@ -79,7 +80,8 @@ func defaultGeneratedAssetUploadPolicy() generatedAssetUploadPolicy {
 func (s *Service) uploadGeneratedAssets(ctx context.Context, taskID string, taskKind string, result map[string]any) (map[string]any, error) {
 	data, _ := result["data"].([]any)
 	rawNeedsUpload := generatedRawValueHasInlineMedia(result["raw"], "", nil)
-	if len(data) == 0 && !rawNeedsUpload {
+	hasInlineBinary := TaskResultHasInlineBinary(result)
+	if len(data) == 0 && !rawNeedsUpload && !hasInlineBinary {
 		redactGeneratedResultRawData(result)
 		return result, nil
 	}
@@ -87,6 +89,18 @@ func (s *Service) uploadGeneratedAssets(ctx context.Context, taskID string, task
 	if err != nil {
 		return nil, &clients.ClientError{Code: "upload_config_failed", Message: err.Error(), Retryable: true}
 	}
+	if policy.LocalizeInlineMedia {
+		next, _, err := s.materializeLocalBinaryResult(ctx, taskID, result)
+		if err != nil {
+			return nil, err
+		}
+		redactGeneratedResultRawData(next)
+		return next, nil
+	}
+	if len(data) == 0 && !rawNeedsUpload {
+		redactGeneratedResultRawData(result)
+		return result, nil
+	}
 	// Topaz download URLs are short-lived. Persist them before the task can be
 	// marked succeeded even when the global policy normally keeps URL media.
 	if taskKind == "videos.upscales" {
@@ -542,7 +556,7 @@ func generatedAssetUploadPolicyFromName(policyName string) generatedAssetUploadP
 	case store.FileStorageResultUploadPolicyUploadAll:
 		return generatedAssetUploadPolicy{UploadInlineMedia: true, UploadURLMedia: true}
 	case store.FileStorageResultUploadPolicyUploadNone:
-		return generatedAssetUploadPolicy{UploadInlineMedia: false, UploadURLMedia: false, PreserveInlineMedia: true}
+		return generatedAssetUploadPolicy{UploadInlineMedia: false, UploadURLMedia: false, PreserveInlineMedia: true, LocalizeInlineMedia: true}
 	default:
 		return defaultGeneratedAssetUploadPolicy()
 	}
@@ -222,7 +222,7 @@ func TestGeneratedAssetUploadPolicyFromName(t *testing.T) {
 		{
 			name:       "upload none",
 			policyName: store.FileStorageResultUploadPolicyUploadNone,
-			want:       generatedAssetUploadPolicy{UploadInlineMedia: false, UploadURLMedia: false, PreserveInlineMedia: true},
+			want:       generatedAssetUploadPolicy{UploadInlineMedia: false, UploadURLMedia: false, PreserveInlineMedia: true, LocalizeInlineMedia: true},
 		},
 	}

@@ -0,0 +1,87 @@
+package store
+
+import (
+	"context"
+	"encoding/json"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+)
+
+type TaskBinaryResultBackfillItem struct {
+	ID         string
+	Result     map[string]any
+	FinishedAt time.Time
+}
+
+func (s *Store) ListTaskBinaryResultBackfillBatch(ctx context.Context, afterID string, batchSize int) ([]TaskBinaryResultBackfillItem, error) {
+	if batchSize < 1 || batchSize > 100 {
+		batchSize = 100
+	}
+	var items []TaskBinaryResultBackfillItem
+	err := pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
+		if _, err := tx.Exec(ctx, `SET LOCAL lock_timeout = '5s'; SET LOCAL statement_timeout = '5s'`); err != nil {
+			return err
+		}
+		rows, err := tx.Query(ctx, `
+SELECT id::text, result, COALESCE(finished_at, updated_at)
+FROM gateway_tasks
+WHERE status = 'succeeded'
+  AND result <> '{}'::jsonb
+  AND (NULLIF($1::text, '') IS NULL OR id > NULLIF($1::text, '')::uuid)
+ORDER BY id
+LIMIT $2`, afterID, batchSize)
+		if err != nil {
+			return err
+		}
+		defer rows.Close()
+		items = make([]TaskBinaryResultBackfillItem, 0, batchSize)
+		for rows.Next() {
+			var item TaskBinaryResultBackfillItem
+			var resultJSON []byte
+			if err := rows.Scan(&item.ID, &resultJSON, &item.FinishedAt); err != nil {
+				return err
+			}
+			item.Result = decodeObject(resultJSON)
+			items = append(items, item)
+		}
+		return rows.Err()
+	})
+	return items, err
+}
+
+func (s *Store) UpdateTaskBinaryResultBackfill(ctx context.Context, taskID string, result map[string]any) (bool, error) {
+	report := sanitizeJSONForStorageWithReport(minimalTaskResult(result))
+	if report.BinaryCount > 0 {
+		return false, &taskPayloadBinaryError{
+			target: ErrTaskResultBinaryNotMaterialized,
+			code:   "result_binary_not_materialized",
+			count:  report.BinaryCount,
+		}
+	}
+	resultJSON, err := json.Marshal(report.Value)
+	if err != nil {
+		return false, err
+	}
+	updated := false
+	err = pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
+		if _, err := tx.Exec(ctx, `SET LOCAL lock_timeout = '5s'; SET LOCAL statement_timeout = '5s'`); err != nil {
+			return err
+		}
+		tag, err := tx.Exec(ctx, `
+UPDATE gateway_tasks
+SET result = $2::jsonb,
+    updated_at = now()
+WHERE id = $1::uuid
+  AND status = 'succeeded'`,
+			taskID,
+			string(resultJSON),
+		)
+		if err != nil {
+			return err
+		}
+		updated = tag.RowsAffected() == 1
+		return nil
+	})
+	return updated, err
+}
@@ -41,7 +41,7 @@ func (s *Store) EnsureConversation(ctx context.Context, user *auth.User, convers
 	if userID == "" {
 		userID = "anonymous"
 	}
-	metadataJSON, _ := json.Marshal(emptyObjectIfNil(metadata))
+	metadataJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(metadata)))
 	var conversationID string
 	err := s.pool.QueryRow(ctx, `
 INSERT INTO gateway_conversations (user_id, gateway_user_id, conversation_key, metadata)
@@ -67,7 +67,15 @@ func (s *Store) UpsertConversationMessages(ctx context.Context, conversationID s
 	refs := make([]TaskMessageRefInput, 0, len(messages))
 	newCount := 0
 	for index, message := range messages {
-		snapshotJSON, _ := json.Marshal(emptyObjectIfNil(message.Snapshot))
+		snapshotReport := sanitizeJSONForStorageWithReport(emptyObjectIfNil(message.Snapshot))
+		if snapshotReport.BinaryCount > 0 {
+			return nil, 0, &taskPayloadBinaryError{
+				target: ErrTaskRequestBinaryNotMaterialized,
+				code:   "request_binary_not_materialized",
+				count:  snapshotReport.BinaryCount,
+			}
+		}
+		snapshotJSON, _ := json.Marshal(snapshotReport.Value)
 		var messageID string
 		var inserted bool
 		if err := tx.QueryRow(ctx, `
@@ -0,0 +1,344 @@
+package store
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+const (
+	storageBinaryPrefixChars      = 16
+	storageGenericBase64MinLength = 4096
+	storageInvalidBinaryMinLength = 512
+	storageJSONSanitizerMaxDepth  = 64
+	storagePlaceholderPrefix      = "[GatewayBinary:v1;"
+	storageBufferObjectType       = "buffer"
+	storageDataURLPrefix          = "data:"
+	storageDataURLBase64Marker    = ";base64"
+	storageDataURLMaxContentType  = 64
+)
+
+var (
+	ErrTaskRequestBinaryNotMaterialized = errors.New("task request binary payload was not materialized")
+	ErrTaskResultBinaryNotMaterialized  = errors.New("task result binary payload was not materialized")
+)
+
+type taskPayloadBinaryError struct {
+	target error
+	code   string
+	count  int
+}
+
+func (e *taskPayloadBinaryError) Error() string {
+	return fmt.Sprintf("%s: detected %d inline binary value(s)", e.code, e.count)
+}
+
+func (e *taskPayloadBinaryError) ErrorCode() string {
+	return e.code
+}
+
+func (e *taskPayloadBinaryError) Is(target error) bool {
+	return target == e.target
+}
+
+type storageSanitizeReport struct {
+	Value       any
+	BinaryCount int
+}
+
+// sanitizeJSONForStorage is the final task-domain persistence guard. It always
+// returns a detached JSON-compatible value and replaces inline binary payloads
+// with a bounded, deterministic placeholder.
+func sanitizeJSONForStorage(value any) any {
+	return sanitizeJSONForStorageWithReport(value).Value
+}
+
+func sanitizeJSONForStorageWithReport(value any) storageSanitizeReport {
+	next, count := sanitizeJSONStorageValue(value, nil, 0)
+	return storageSanitizeReport{Value: next, BinaryCount: count}
+}
+
+func sanitizeJSONStorageValue(value any, path []string, depth int) (any, int) {
+	if depth >= storageJSONSanitizerMaxDepth {
+		return "[JSON,max-depth]", 0
+	}
+	switch typed := value.(type) {
+	case map[string]any:
+		if payload, contentType, ok := storageBufferObjectBytes(typed); ok {
+			return storageBinaryPlaceholder(payload, contentType, "buffer"), 1
+		}
+		next := make(map[string]any, len(typed))
+		count := 0
+		for key, child := range typed {
+			sanitized, childCount := sanitizeJSONStorageValue(child, appendStoragePath(path, key), depth+1)
+			next[key] = sanitized
+			count += childCount
+		}
+		return next, count
+	case []any:
+		if storagePathIsBinary(path) {
+			if payload, ok := storageNumberArrayBytes(typed); ok {
+				return storageBinaryPlaceholder(payload, "", "buffer"), 1
+			}
+		}
+		next := make([]any, len(typed))
+		count := 0
+		for index, child := range typed {
+			sanitized, childCount := sanitizeJSONStorageValue(child, path, depth+1)
+			next[index] = sanitized
+			count += childCount
+		}
+		return next, count
+	case []byte:
+		return storageBinaryPlaceholder(typed, "", "buffer"), 1
+	case string:
+		if placeholder, ok := storageStringPlaceholder(typed, path); ok {
+			return placeholder, 1
+		}
+		return typed, 0
+	default:
+		return value, 0
+	}
+}
+
+func appendStoragePath(path []string, key string) []string {
+	next := make([]string, len(path)+1)
+	copy(next, path)
+	next[len(path)] = key
+	return next
+}
+
+func storageStringPlaceholder(value string, path []string) (string, bool) {
+	raw := strings.TrimSpace(value)
+	if raw == "" || strings.HasPrefix(raw, storagePlaceholderPrefix) {
+		return "", false
+	}
+	encoded, contentType, dataURL := storageBase64StringParts(raw)
+	strict := dataURL || storagePathIsBinary(path)
+	if !strict && len(encoded) < storageGenericBase64MinLength {
+		return "", false
+	}
+	payload, ok := storageDecodeBase64(encoded)
+	if ok {
+		encoding := "raw"
+		if dataURL {
+			encoding = "data-uri"
+		}
+		return storageBinaryPlaceholder(payload, contentType, encoding), true
+	}
+	if strict && len(raw) >= storageInvalidBinaryMinLength {
+		return storageBinaryPlaceholder([]byte(raw), contentType, "raw"), true
+	}
+	return "", false
+}
+
+func storageBase64StringParts(value string) (encoded string, contentType string, dataURL bool) {
+	if !strings.HasPrefix(strings.ToLower(value), storageDataURLPrefix) {
+		return value, "", false
+	}
+	prefix, payload, ok := strings.Cut(value, ",")
+	if !ok || !strings.Contains(strings.ToLower(prefix), storageDataURLBase64Marker) {
+		return value, "", false
+	}
+	mediaType := strings.TrimSpace(prefix[len(storageDataURLPrefix):])
+	if before, _, found := strings.Cut(mediaType, ";"); found {
+		mediaType = before
+	}
+	if len(mediaType) > storageDataURLMaxContentType || !storageSafeContentType(mediaType) {
+		mediaType = ""
+	}
+	return payload, strings.ToLower(mediaType), true
+}
+
+func storageSafeContentType(value string) bool {
+	if value == "" {
+		return true
+	}
+	for _, char := range value {
+		switch {
+		case char >= 'a' && char <= 'z':
+		case char >= 'A' && char <= 'Z':
+		case char >= '0' && char <= '9':
+		case char == '/', char == '.', char == '+', char == '-':
+		default:
+			return false
+		}
+	}
+	return true
+}
+
+func storageDecodeBase64(value string) ([]byte, bool) {
+	normalized := removeStorageASCIIWhitespace(value)
+	if normalized == "" {
+		return nil, false
+	}
+	for _, encoding := range []*base64.Encoding{
+		base64.StdEncoding,
+		base64.RawStdEncoding,
+		base64.URLEncoding,
+		base64.RawURLEncoding,
+	} {
+		payload, err := encoding.DecodeString(normalized)
+		if err != nil || len(payload) == 0 {
+			continue
+		}
+		canonical := encoding.EncodeToString(payload)
+		if strings.TrimRight(normalized, "=") == strings.TrimRight(canonical, "=") {
+			return payload, true
+		}
+	}
+	return nil, false
+}
+
+func removeStorageASCIIWhitespace(value string) string {
+	return strings.Map(func(char rune) rune {
+		switch char {
+		case ' ', '\n', '\r', '\t':
+			return -1
+		default:
+			return char
+		}
+	}, value)
+}
+
+func storagePathIsBinary(path []string) bool {
+	if len(path) == 0 {
+		return false
+	}
+	key := normalizeStorageBinaryKey(path[len(path)-1])
+	if storageBinaryKey(key) {
+		return true
+	}
+	if len(path) < 2 {
+		return false
+	}
+	parent := normalizeStorageBinaryKey(path[len(path)-2])
+	return (parent == "inlinedata" || parent == "binary" || parent == "media") &&
+		(key == "data" || key == "content")
+}
+
+func normalizeStorageBinaryKey(value string) string {
+	return strings.Map(func(char rune) rune {
+		switch {
+		case char >= 'a' && char <= 'z':
+			return char
+		case char >= 'A' && char <= 'Z':
+			return char + ('a' - 'A')
+		case char >= '0' && char <= '9':
+			return char
+		default:
+			return -1
+		}
+	}, value)
+}
+
+func storageBinaryKey(key string) bool {
+	return key == "b64" ||
+		key == "b64json" ||
+		key == "base64" ||
+		key == "buffer" ||
+		key == "bytes" ||
+		strings.Contains(key, "base64") ||
+		strings.Contains(key, "buffer") ||
+		strings.Contains(key, "binary") ||
+		strings.HasSuffix(key, "b64") ||
+		strings.HasSuffix(key, "bytes")
+}
+
+func storageBufferObjectBytes(value map[string]any) ([]byte, string, bool) {
+	kind, _ := value["type"].(string)
+	if normalizeStorageBinaryKey(kind) != storageBufferObjectType {
+		return nil, "", false
+	}
+	contentType := firstNonEmpty(
+		stringFromAny(value["mime_type"]),
+		stringFromAny(value["mimeType"]),
+		stringFromAny(value["contentType"]),
+	)
+	switch data := value["data"].(type) {
+	case []byte:
+		if len(data) == 0 {
+			return nil, "", false
+		}
+		return append([]byte(nil), data...), contentType, true
+	case []any:
+		payload, ok := storageNumberArrayBytes(data)
+		return payload, contentType, ok
+	default:
+		return nil, "", false
+	}
+}
+
+func storageNumberArrayBytes(values []any) ([]byte, bool) {
+	if len(values) == 0 {
+		return nil, false
+	}
+	payload := make([]byte, len(values))
+	for index, value := range values {
+		next, ok := storageByteFromAny(value)
+		if !ok {
+			return nil, false
+		}
+		payload[index] = next
+	}
+	return payload, true
+}
+
+func storageByteFromAny(value any) (byte, bool) {
+	switch typed := value.(type) {
+	case byte:
+		return typed, true
+	case int:
+		if typed >= 0 && typed <= 255 {
+			return byte(typed), true
+		}
+	case int32:
+		if typed >= 0 && typed <= 255 {
+			return byte(typed), true
+		}
+	case int64:
+		if typed >= 0 && typed <= 255 {
+			return byte(typed), true
+		}
+	case float64:
+		asInt := int(typed)
+		if typed == float64(asInt) && asInt >= 0 && asInt <= 255 {
+			return byte(asInt), true
+		}
+	case json.Number:
+		asInt, err := strconv.ParseInt(string(typed), 10, 16)
+		if err == nil && asInt >= 0 && asInt <= 255 {
+			return byte(asInt), true
+		}
+	}
+	return 0, false
+}
+
+func storageBinaryPlaceholder(payload []byte, contentType string, encoding string) string {
+	digest := sha256.Sum256(payload)
+	prefix := base64.StdEncoding.EncodeToString(payload)
+	if len(prefix) > storageBinaryPrefixChars {
+		prefix = prefix[:storageBinaryPrefixChars]
+	}
+	contentType = strings.ToLower(strings.TrimSpace(contentType))
+	if contentType == "" || len(contentType) > 32 || !storageSafeContentType(contentType) {
+		contentType = "application/octet-stream"
+	}
+	switch encoding {
+	case "data-uri", "buffer":
+	default:
+		encoding = "raw"
+	}
+	return fmt.Sprintf(
+		"[GatewayBinary:v1;prefix=%s;sha256=%x;bytes=%d;mime=%s;encoding=%s]",
+		prefix,
+		digest,
+		len(payload),
+		contentType,
+		encoding,
+	)
+}
@@ -0,0 +1,103 @@
+package store
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"strings"
+	"testing"
+)
+
+func TestSanitizeJSONForStorageReplacesBinaryWithoutMutatingInput(t *testing.T) {
+	payload := []byte("shared binary payload")
+	encoded := base64.StdEncoding.EncodeToString(payload)
+	input := map[string]any{
+		"data": []any{
+			map[string]any{"b64_json": encoded},
+		},
+		"buffer": map[string]any{
+			"type": "Buffer",
+			"data": []any{float64(1), float64(2), float64(3)},
+		},
+		"text": "ordinary text",
+	}
+
+	report := sanitizeJSONForStorageWithReport(input)
+	if report.BinaryCount != 2 {
+		t.Fatalf("binary count = %d, want 2", report.BinaryCount)
+	}
+	next := report.Value.(map[string]any)
+	data := next["data"].([]any)
+	placeholder := data[0].(map[string]any)["b64_json"].(string)
+	if !strings.HasPrefix(placeholder, storagePlaceholderPrefix) {
+		t.Fatalf("unexpected placeholder: %q", placeholder)
+	}
+	if len(placeholder) > 200 {
+		t.Fatalf("placeholder exceeds 200 bytes: %d", len(placeholder))
+	}
+	if !strings.Contains(placeholder, ";prefix="+encoded[:16]+";") {
+		t.Fatalf("placeholder should retain the bounded Base64 prefix: %q", placeholder)
+	}
+	if got := input["data"].([]any)[0].(map[string]any)["b64_json"]; got != encoded {
+		t.Fatalf("sanitizer mutated input: %v", got)
+	}
+	if next["text"] != "ordinary text" {
+		t.Fatalf("ordinary text changed: %+v", next)
+	}
+}
+
+func TestSanitizeJSONForStorageUsesDecodedBytesForEquivalentRepresentations(t *testing.T) {
+	payload := []byte("equivalent payload")
+	encoded := base64.StdEncoding.EncodeToString(payload)
+	report := sanitizeJSONForStorageWithReport(map[string]any{
+		"rawBase64": encoded,
+		"dataURL":   "data:image/png;base64," + encoded,
+		"bytes":     []any{float64('e'), float64('q'), float64('u'), float64('i'), float64('v'), float64('a'), float64('l'), float64('e'), float64('n'), float64('t'), float64(' '), float64('p'), float64('a'), float64('y'), float64('l'), float64('o'), float64('a'), float64('d')},
+	})
+	if report.BinaryCount != 3 {
+		t.Fatalf("binary count = %d, want 3", report.BinaryCount)
+	}
+	next := report.Value.(map[string]any)
+	hashes := map[string]struct{}{}
+	for _, key := range []string{"rawBase64", "dataURL", "bytes"} {
+		value := next[key].(string)
+		hashStart := strings.Index(value, ";sha256=")
+		hashEnd := strings.Index(value[hashStart+1:], ";bytes=")
+		if hashStart < 0 || hashEnd < 0 {
+			t.Fatalf("missing hash in %s placeholder: %q", key, value)
+		}
+		hashes[value[hashStart+8:hashStart+1+hashEnd]] = struct{}{}
+	}
+	if len(hashes) != 1 {
+		t.Fatalf("equivalent binary values produced different hashes: %+v", next)
+	}
+}
+
+func TestSanitizeJSONForStorageAvoidsShortGenericTextFalsePositive(t *testing.T) {
+	input := map[string]any{"message": "YWJjZA==", "count": json.Number("12")}
+	report := sanitizeJSONForStorageWithReport(input)
+	if report.BinaryCount != 0 {
+		t.Fatalf("short generic Base64-like text should not be sanitized: %+v", report)
+	}
+}
+
+func TestSanitizeJSONForStorageRecognizesExistingPlaceholder(t *testing.T) {
+	value := storageBinaryPlaceholder([]byte("payload"), "image/png", "raw")
+	report := sanitizeJSONForStorageWithReport(map[string]any{"b64_json": value})
+	if report.BinaryCount != 0 {
+		t.Fatalf("existing placeholder should pass the final guard: %+v", report)
+	}
+}
+
+func TestStorageBinaryPlaceholderIsAlwaysBounded(t *testing.T) {
+	value := storageBinaryPlaceholder(
+		[]byte("payload"),
+		"application/vnd.a-very-long-provider-specific-generated-binary-result+json",
+		"data-uri",
+	)
+	if len(value) > 200 {
+		t.Fatalf("placeholder exceeds 200 bytes: %d %q", len(value), value)
+	}
+	if !strings.Contains(value, ";mime=application/octet-stream;") {
+		t.Fatalf("oversized MIME should use the bounded fallback: %q", value)
+	}
+}
@@ -1993,7 +1993,15 @@ func (s *Store) CreateTask(ctx context.Context, input CreateTaskInput, user *aut
 }

 func (s *Store) CreateTaskIdempotent(ctx context.Context, input CreateTaskInput, user *auth.User) (CreateTaskResult, error) {
-	requestBody, _ := json.Marshal(input.Request)
+	requestReport := sanitizeJSONForStorageWithReport(input.Request)
+	if requestReport.BinaryCount > 0 {
+		return CreateTaskResult{}, &taskPayloadBinaryError{
+			target: ErrTaskRequestBinaryNotMaterialized,
+			code:   "request_binary_not_materialized",
+			count:  requestReport.BinaryCount,
+		}
+	}
+	requestBody, _ := json.Marshal(requestReport.Value)
 	runMode := normalizeRunMode(input.RunMode, input.Request)
 	status := "queued"
 	resultBody, _ := json.Marshal(map[string]any(nil))
@@ -2048,7 +2056,7 @@ WHERE user_id = $1 AND idempotency_key_hash = $2`, user.ID, strings.TrimSpace(in
 		}
 		events := taskEventsForCreate(task.ID, runMode, status, nil)
 		for _, event := range events {
-			payload, _ := json.Marshal(event.Payload)
+			payload, _ := json.Marshal(sanitizeJSONForStorage(event.Payload))
 			if _, err := tx.Exec(ctx, `
 INSERT INTO gateway_task_events (task_id, seq, event_type, status, phase, progress, message, payload, simulated)
 VALUES ($1::uuid, $2, $3::text, NULLIF($4::text, ''), NULLIF($5::text, ''), $6, NULLIF($7::text, ''), $8::jsonb, $9)`,
@@ -45,15 +45,15 @@ type CreateResponseChainInput struct {
 }

 func (s *Store) CreateResponseChain(ctx context.Context, input CreateResponseChainInput) error {
-	requestJSON, err := json.Marshal(input.RequestSnapshot)
+	requestJSON, err := json.Marshal(sanitizeJSONForStorage(input.RequestSnapshot))
 	if err != nil {
 		return err
 	}
-	responseJSON, err := json.Marshal(input.ResponseSnapshot)
+	responseJSON, err := json.Marshal(sanitizeJSONForStorage(input.ResponseSnapshot))
 	if err != nil {
 		return err
 	}
-	internalJSON, err := json.Marshal(input.InternalSnapshot)
+	internalJSON, err := json.Marshal(sanitizeJSONForStorage(input.InternalSnapshot))
 	if err != nil {
 		return err
 	}
@@ -503,7 +503,7 @@ WHERE id = $1::uuid`, taskID, riverJobID)
 }

 func (s *Store) SetTaskRemoteTask(ctx context.Context, taskID string, executionToken string, attemptID string, remoteTaskID string, payload map[string]any) error {
-	payloadJSON, _ := json.Marshal(emptyObjectIfNil(payload))
+	payloadJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(payload)))
 	return pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
 		tag, err := tx.Exec(ctx, `
 UPDATE gateway_tasks
@@ -732,7 +732,7 @@ func (s *Store) CreateTaskParamPreprocessingLog(ctx context.Context, input Creat
 	if !input.Changed {
 		return "", nil
 	}
-	changesJSON, _ := json.Marshal(input.Changes)
+	changesJSON, _ := json.Marshal(sanitizeJSONForStorage(input.Changes))
 	if input.Changes == nil {
 		changesJSON = []byte("[]")
 	}
@@ -1029,12 +1029,20 @@ WHERE id = $1::uuid`,
 }

 func (s *Store) FinishTaskSuccess(ctx context.Context, input FinishTaskSuccessInput) (GatewayTask, error) {
-	resultJSON, _ := json.Marshal(minimalTaskResult(input.Result))
-	billingsJSON, _ := json.Marshal(input.Billings)
-	usageJSON, _ := json.Marshal(emptyObjectIfNil(input.Usage))
-	metricsJSON, _ := json.Marshal(emptyObjectIfNil(input.Metrics))
-	billingSummaryJSON, _ := json.Marshal(emptyObjectIfNil(input.BillingSummary))
-	pricingSnapshotJSON, _ := json.Marshal(emptyObjectIfNil(input.PricingSnapshot))
+	resultReport := sanitizeJSONForStorageWithReport(minimalTaskResult(input.Result))
+	if resultReport.BinaryCount > 0 {
+		return GatewayTask{}, &taskPayloadBinaryError{
+			target: ErrTaskResultBinaryNotMaterialized,
+			code:   "result_binary_not_materialized",
+			count:  resultReport.BinaryCount,
+		}
+	}
+	resultJSON, _ := json.Marshal(resultReport.Value)
+	billingsJSON, _ := json.Marshal(sanitizeJSONForStorage(input.Billings))
+	usageJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(input.Usage)))
+	metricsJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(input.Metrics)))
+	billingSummaryJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(input.BillingSummary)))
+	pricingSnapshotJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(input.PricingSnapshot)))
 	finalChargeAmount := strings.TrimSpace(input.FinalChargeAmountText)
 	if finalChargeAmount == "" {
 		finalChargeAmount = strconv.FormatFloat(input.FinalChargeAmount, 'f', 9, 64)
@@ -1158,8 +1166,16 @@ func (s *Store) FinishTaskManualReview(ctx context.Context, input FinishTaskManu
 	if status == "failed" {
 		result = nil
 	}
-	resultJSON, _ := json.Marshal(minimalTaskResult(result))
-	pricingSnapshotJSON, _ := json.Marshal(emptyObjectIfNil(input.PricingSnapshot))
+	resultReport := sanitizeJSONForStorageWithReport(minimalTaskResult(result))
+	if resultReport.BinaryCount > 0 {
+		return GatewayTask{}, &taskPayloadBinaryError{
+			target: ErrTaskResultBinaryNotMaterialized,
+			code:   "result_binary_not_materialized",
+			count:  resultReport.BinaryCount,
+		}
+	}
+	resultJSON, _ := json.Marshal(resultReport.Value)
+	pricingSnapshotJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(input.PricingSnapshot)))
 	err := pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
 		if strings.TrimSpace(input.AttemptID) != "" {
 			attemptStatus := "failed"
@@ -1261,7 +1277,7 @@ func (s *Store) SettleTaskBilling(ctx context.Context, task GatewayTask) error {
 		"billings":       task.Billings,
 		"billingSummary": task.BillingSummary,
 	}
-	metadata, _ := json.Marshal(metadataMap)
+	metadata, _ := json.Marshal(sanitizeJSONForStorage(metadataMap))
 	return pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
 		if _, err := tx.Exec(ctx, `
 INSERT INTO gateway_wallet_accounts (
@@ -1353,7 +1369,7 @@ ON CONFLICT (account_id, idempotency_key) WHERE idempotency_key IS NOT NULL DO N
 			"frozenBefore":   roundMoney(frozenBefore),
 			"frozenAfter":    frozenAfter,
 		})
-		metadata, _ = json.Marshal(billingMetadata)
+		metadata, _ = json.Marshal(sanitizeJSONForStorage(billingMetadata))
 		if _, err := tx.Exec(ctx, `
 INSERT INTO gateway_wallet_transactions (
  account_id, gateway_tenant_id, gateway_user_id, direction, transaction_type,
@@ -1389,7 +1405,7 @@ func taskBillingString(value any) string {
 }

 func (s *Store) FinishTaskFailure(ctx context.Context, input FinishTaskFailureInput) (GatewayTask, error) {
-	metricsJSON, _ := json.Marshal(emptyObjectIfNil(input.Metrics))
+	metricsJSON, _ := json.Marshal(sanitizeJSONForStorage(emptyObjectIfNil(input.Metrics)))
 	resultJSON, _ := json.Marshal(minimalTaskResult(nil))
 	message := truncateUTF8Bytes(input.Message, 2048)
 	err := pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
@@ -161,7 +161,7 @@ func (s *Store) ReserveTaskBilling(ctx context.Context, task GatewayTask, user *
 	}

 	reservations := make([]WalletBillingReservation, 0, len(amounts))
-	pricingSnapshotJSON, _ := json.Marshal(pricingSnapshot)
+	pricingSnapshotJSON, _ := json.Marshal(sanitizeJSONForStorage(pricingSnapshot))
 	requestFingerprint := walletString(pricingSnapshot["requestFingerprint"])
 	err := pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
 		for currency, rawAmount := range amounts {
@@ -306,7 +306,7 @@ func (s *Store) reserveTaskBillingExact(ctx context.Context, task GatewayTask, g
 	if currency != "resource" {
 		return nil, fmt.Errorf("unsupported billing currency %q", currency)
 	}
-	pricingSnapshotJSON, _ := json.Marshal(pricingSnapshot)
+	pricingSnapshotJSON, _ := json.Marshal(sanitizeJSONForStorage(pricingSnapshot))
 	requestFingerprint := walletString(pricingSnapshot["requestFingerprint"])
 	var reservations []WalletBillingReservation
 	err := pgx.BeginFunc(ctx, s.pool, func(tx pgx.Tx) error {
@@ -51,7 +51,7 @@ const sceneOptions = [
 const resultUploadPolicyOptions = [
  { value: 'default', label: '默认：仅非链接资源转存', description: 'URL 结果直接保存；base64 / buffer 等结果转存后保存 URL' },
  { value: 'upload_all', label: '全部转存', description: 'URL、base64、buffer 等生成媒体结果都会转存到当前文件渠道' },
-  { value: 'upload_none', label: '全部不转存', description: '链接结果直接保存；base64 / buffer 结果保留在对应响应字段中' },
+  { value: 'upload_none', label: '不做外部转存', description: 'base64 / buffer 临时写入本地静态文件；数据库仅保存占位符，默认 24 小时内按需恢复' },
 ];

 export function SystemSettingsPanel(props: {
@@ -29,6 +29,10 @@ x-api-environment: &api-environment
  AI_GATEWAY_WEB_BASE_URL: ${AI_GATEWAY_COMPOSE_WEB_BASE_URL:-http://localhost:5178}
  AI_GATEWAY_GENERATED_STORAGE_DIR: /app/data/static/generated
  AI_GATEWAY_UPLOADED_STORAGE_DIR: /app/data/static/uploaded
+  AI_GATEWAY_LOCAL_RESULT_TTL_HOURS: ${AI_GATEWAY_LOCAL_RESULT_TTL_HOURS:-24}
+  AI_GATEWAY_LOCAL_RESULT_MIN_FREE_BYTES: ${AI_GATEWAY_LOCAL_RESULT_MIN_FREE_BYTES:-10737418240}
+  AI_GATEWAY_LOCAL_RESULT_MAX_BYTES: ${AI_GATEWAY_LOCAL_RESULT_MAX_BYTES:-268435456}
+  AI_GATEWAY_LOCAL_RESULT_MAX_TASK_BYTES: ${AI_GATEWAY_LOCAL_RESULT_MAX_TASK_BYTES:-536870912}

 services:
  postgres:
@@ -1823,11 +1823,18 @@ AI_GATEWAY_TASK_RETENTION_DAYS=30
 AI_GATEWAY_TASK_ANALYSIS_RETENTION_DAYS=7
 AI_GATEWAY_TASK_CLEANUP_INTERVAL_SECONDS=300
 AI_GATEWAY_TASK_CLEANUP_BATCH_SIZE=1000
+AI_GATEWAY_LOCAL_RESULT_TTL_HOURS=24
+AI_GATEWAY_LOCAL_RESULT_MIN_FREE_BYTES=10737418240
+AI_GATEWAY_LOCAL_RESULT_MAX_BYTES=268435456
+AI_GATEWAY_LOCAL_RESULT_MAX_TASK_BYTES=536870912
 ```

 运行时要求：

 - 首次上线先保持清理关闭；兼容协议和异步恢复验收通过后，显式改为 `AI_GATEWAY_TASK_CLEANUP_ENABLED=true`，再启动历史压缩和 7/30 天删除。
+- 结果策略为 `upload_none` 时，Base64、Data URI 和 Buffer 只写入 `data/static/generated/results/<task-id>/<sha256>.bin`；任务 JSON 保存固定占位符，查询结果时校验大小与 SHA-256 后恢复 Base64。
+- 本地二进制结果默认保留 24 小时；文件过期返回 `410 binary_result_expired`，文件损坏返回 `500 binary_result_corrupted`。写入前保留至少 10GiB 空间，单文件和单任务上限分别为 256MiB、512MiB。
+- 历史二进制治理使用镜像内 `/app/easyai-ai-gateway-backfill-binary-results` 先 dry-run；确认范围后带 `--apply`，每批最多 100 行，使用输出的 `resumeAfterId` 分段继续。该命令不会随服务启动自动执行。
 - runtime 仅在任务真实状态变化时写 `gateway_task_events`；事件 payload 固定为空，轮询不会生成事件。
 - callback worker 以 `0083_task_history_minimal_storage` 的应用时间为边界，只投递新 outbox；旧 pending/processing callback 在启用治理后分批标记为 `failed`，不会向业务端补发形成历史回调风暴。
 - callback worker 使用 `SERVER_MAIN_INTERNAL_TOKEN` 调用 `TASK_PROGRESS_CALLBACK_URL`。