diff --git a/apps/api/src/flowchart/run.ts b/apps/api/src/flowchart/run.ts
index 223fb98..1fef1d7 100644
--- a/apps/api/src/flowchart/run.ts
+++ b/apps/api/src/flowchart/run.ts
@@ -57,7 +57,7 @@ export async function evaluateFlowchart(job: FlowchartJobData) {
     }).where(eq(schema.flowchartSubmission.id, row.flowchart.id))
     await publishFlowchartUpdate(row.flowchart.userId, flowchartUpdateSchema.parse({
       type: "flowchart_evaluation_completed",
-      submission_id: row.flowchart.id,
+      submissionId: row.flowchart.id,
       score: result.score,
       grade: result.grade,
       feedback: result.feedback,
@@ -69,7 +69,7 @@ export async function evaluateFlowchart(job: FlowchartJobData) {
     await db.update(schema.flowchartSubmission).set({ status: 3 }).where(eq(schema.flowchartSubmission.id, row.flowchart.id))
     await publishFlowchartUpdate(row.flowchart.userId, flowchartUpdateSchema.parse({
       type: "flowchart_evaluation_failed",
-      submission_id: row.flowchart.id,
+      submissionId: row.flowchart.id,
       error: message,
     }))
     throw error
diff --git a/apps/api/src/judge/run.ts b/apps/api/src/judge/run.ts
index b8f7128..409f23b 100644
--- a/apps/api/src/judge/run.ts
+++ b/apps/api/src/judge/run.ts
@@ -317,10 +317,9 @@ async function markSystemError(submissionId: string, userId: number, error: unkn
   if (updated.length > 0) {
     await publishSubmissionUpdate(userId, {
       type: "submission_update",
-      submission_id: submissionId,
+      submissionId,
       result: JudgeStatus.SYSTEM_ERROR,
       status: "error",
-      err_info: message,
     })
   }
 }
@@ -353,7 +352,7 @@ export async function judgeSubmission(job: JudgeJobData) {
       .where(eq(schema.submission.id, row.submission.id))
     await publishSubmissionUpdate(row.submission.userId, {
       type: "submission_update",
-      submission_id: row.submission.id,
+      submissionId: row.submission.id,
       result: JudgeStatus.JUDGING,
       status: "judging",
     })
@@ -463,17 +462,9 @@ export async function judgeSubmission(job: JudgeJobData) {
 
     await publishSubmissionUpdate(row.submission.userId, {
       type: "submission_update",
-      submission_id: row.submission.id,
+      submissionId: row.submission.id,
       result,
       status: "finished",
-      time_cost:
-        typeof statisticInfo.time_cost === "number"
-          ? statisticInfo.time_cost
-          : undefined,
-      memory_cost:
-        typeof statisticInfo.memory_cost === "number"
-          ? statisticInfo.memory_cost
-          : undefined,
       score:
         typeof statisticInfo.score === "number" ? statisticInfo.score : undefined,
     })
diff --git a/apps/api/src/websocket.ts b/apps/api/src/websocket.ts
index 11cc54f..01508c9 100644
--- a/apps/api/src/websocket.ts
+++ b/apps/api/src/websocket.ts
@@ -67,7 +67,7 @@ async function handleMessage(
     return
   }
 
-  let message: { type?: unknown; timestamp?: unknown; submission_id?: unknown }
+  let message: { type?: unknown; timestamp?: unknown; submissionId?: unknown }
   try {
     message = JSON.parse(raw) as typeof message
   } catch {
@@ -79,7 +79,7 @@ async function handleMessage(
     ws.send(JSON.stringify({ type: "pong", timestamp: message.timestamp }))
     return
   }
-  if (message.type !== "subscribe" || typeof message.submission_id !== "string") {
+  if (message.type !== "subscribe" || typeof message.submissionId !== "string") {
     ws.send(JSON.stringify({ type: "error", message: "Invalid message" }))
     return
   }
@@ -93,7 +93,7 @@ async function handleMessage(
     .from(schema.submission)
     .where(
       and(
-        eq(schema.submission.id, message.submission_id),
+        eq(schema.submission.id, message.submissionId),
         eq(schema.submission.userId, ws.data.userId),
       ),
     )
@@ -103,17 +103,17 @@ async function handleMessage(
     const [flowchart] = await db
       .select({ id: schema.flowchartSubmission.id, status: schema.flowchartSubmission.status, score: schema.flowchartSubmission.aiScore, grade: schema.flowchartSubmission.aiGrade })
       .from(schema.flowchartSubmission)
-      .where(and(eq(schema.flowchartSubmission.id, message.submission_id), eq(schema.flowchartSubmission.userId, ws.data.userId)))
+      .where(and(eq(schema.flowchartSubmission.id, message.submissionId), eq(schema.flowchartSubmission.userId, ws.data.userId)))
       .limit(1)
     if (!flowchart) {
       ws.send(JSON.stringify({ type: "error", message: "Submission not found" }))
       return
     }
     const replay = flowchart.status === 2
-      ? { type: "flowchart_evaluation_completed", submission_id: flowchart.id, score: flowchart.score ?? undefined, grade: flowchart.grade ?? undefined }
+      ? { type: "flowchart_evaluation_completed", submissionId: flowchart.id, score: flowchart.score ?? undefined, grade: flowchart.grade ?? undefined }
       : flowchart.status === 3
-        ? { type: "flowchart_evaluation_failed", submission_id: flowchart.id, error: "Evaluation failed" }
-        : { type: "flowchart_evaluation_update", submission_id: flowchart.id }
+        ? { type: "flowchart_evaluation_failed", submissionId: flowchart.id, error: "Evaluation failed" }
+        : { type: "flowchart_evaluation_update", submissionId: flowchart.id }
     ws.send(JSON.stringify(flowchartUpdateSchema.parse(replay)))
     return
   }
@@ -129,13 +129,10 @@ async function handleMessage(
           : "finished"
   const parsed = submissionUpdateSchema.safeParse({
     type: "submission_update",
-    submission_id: submission.id,
+    submissionId: submission.id,
     result: submission.result,
     status,
-    time_cost: statistics.time_cost,
-    memory_cost: statistics.memory_cost,
     score: statistics.score,
-    err_info: statistics.err_info,
   })
   if (parsed.success) ws.send(JSON.stringify(parsed.data))
 }
diff --git a/apps/web/src/oj/problem/composables/useSubmissionMonitor.ts b/apps/web/src/oj/problem/composables/useSubmissionMonitor.ts
index ca523a6..eb675bc 100644
--- a/apps/web/src/oj/problem/composables/useSubmissionMonitor.ts
+++ b/apps/web/src/oj/problem/composables/useSubmissionMonitor.ts
@@ -62,7 +62,7 @@ export function useSubmissionMonitor() {
 
     console.log("[SubmissionMonitor] 收到WebSocket更新:", data)
 
-    if (data.submission_id !== submissionId.value) {
+    if (data.submissionId !== submissionId.value) {
       console.log("[SubmissionMonitor] 提交ID不匹配，忽略")
       return
     }
diff --git a/apps/web/src/shared/composables/websocket.ts b/apps/web/src/shared/composables/websocket.ts
index bbda82b..98c1340 100644
--- a/apps/web/src/shared/composables/websocket.ts
+++ b/apps/web/src/shared/composables/websocket.ts
@@ -287,13 +287,10 @@ export class BaseWebSocket<T extends WebSocketMessage = WebSocketMessage> {
  */
 export interface SubmissionUpdate extends WebSocketMessage {
   type: "submission_update"
-  submission_id: string
+  submissionId: string
   result: number
   status: "pending" | "judging" | "finished" | "error"
-  time_cost?: number
-  memory_cost?: number
   score?: number
-  err_info?: string
 }
 
 /**
@@ -314,7 +311,7 @@ class SubmissionWebSocket extends BaseWebSocket<SubmissionUpdate> {
     this.pendingSubmissionId = submissionId
     const success = this.send({
       type: "subscribe",
-      submission_id: submissionId,
+      submissionId,
     })
     if (success) this.pendingSubmissionId = ""
   }
@@ -325,7 +322,7 @@ class SubmissionWebSocket extends BaseWebSocket<SubmissionUpdate> {
     if (
       this.send({
         type: "subscribe",
-        submission_id: submissionId,
+        submissionId,
       })
     ) {
       this.pendingSubmissionId = ""
@@ -429,7 +426,7 @@ export interface FlowchartEvaluationUpdate extends WebSocketMessage {
     | "flowchart_evaluation_completed"
     | "flowchart_evaluation_failed"
     | "flowchart_evaluation_update"
-  submission_id: string
+  submissionId: string
   score?: number
   grade?: string
   feedback?: string
@@ -453,7 +450,7 @@ class FlowchartWebSocket extends BaseWebSocket<FlowchartEvaluationUpdate> {
   subscribe(submissionId: string) {
     const success = this.send({
       type: "subscribe",
-      submission_id: submissionId,
+      submissionId,
     })
     if (!success) {
       console.error("[Flowchart WebSocket] 订阅失败: 连接未就绪")
diff --git a/packages/contract/src/flowchart.ts b/packages/contract/src/flowchart.ts
index 7bfdcb5..f1c8588 100644
--- a/packages/contract/src/flowchart.ts
+++ b/packages/contract/src/flowchart.ts
@@ -78,7 +78,7 @@ export const flowchartUpdateSchema = z.object({
     "flowchart_evaluation_failed",
     "flowchart_evaluation_update",
   ]),
-  submission_id: z.string(),
+  submissionId: z.string(),
   score: z.number().optional(),
   grade: z.string().optional(),
   feedback: z.string().optional(),
diff --git a/packages/contract/src/submission.ts b/packages/contract/src/submission.ts
index 8d06ab6..65bc0e8 100644
--- a/packages/contract/src/submission.ts
+++ b/packages/contract/src/submission.ts
@@ -68,15 +68,20 @@ export const embeddedSubmissionSchema = submissionDetailSchema
   // 站内信页面拿它拼 `/problem/<题号>` 链接，给数字 id 会拼出打不开的地址。
   .extend({ problem: z.string() })
 
+/**
+ * 判题进度推送。**只带前端真正要用的东西**：靠 submissionId 认领、靠 result /
+ * status 决定是继续等还是去拉详情。
+ *
+ * 这里曾经还带着 time_cost / memory_cost / err_info —— 从 statistic_info 原样
+ * 抄一份出来，前端一处都没读过。耗时和错误信息在提交详情里本来就有，判完了去
+ * 拉一次就是了，不必让推送顺带背一份 JSONB 的形状。
+ */
 export const submissionUpdateSchema = z.object({
   type: z.literal("submission_update"),
-  submission_id: z.string(),
+  submissionId: z.string(),
   result: judgeStatusSchema,
   status: z.enum(["pending", "judging", "finished", "error"]),
-  time_cost: z.number().optional(),
-  memory_cost: z.number().optional(),
   score: z.number().optional(),
-  err_info: z.string().optional(),
 })
 
 export const submissionListItemSchema = z.object({