diff --git a/src/agent/agent.service.ts b/src/agent/agent.service.ts
index d09393c..a6b9cd2 100644
--- a/src/agent/agent.service.ts
+++ b/src/agent/agent.service.ts
@@ -42,11 +42,18 @@ export class AgentService {
     );
   }
 
-  async createInvocation(input: CreateAgentInvocationInput): Promise<AgentInvocation> {
+  async createInvocation(
+    input: CreateAgentInvocationInput,
+  ): Promise<AgentInvocation> {
     if (!allowedTypes.includes(input.type)) {
-      throw new AppError('VALIDATION_FAILED', 'Unsupported agent invocation type', 400, {
-        type: input.type,
-      });
+      throw new AppError(
+        'VALIDATION_FAILED',
+        'Unsupported agent invocation type',
+        400,
+        {
+          type: input.type,
+        },
+      );
     }
 
     const llmHealth = this.llmClient.healthSummary();
@@ -74,7 +81,7 @@ export class AgentService {
           status: 'success',
           resultMarkdown: completion.text || mockResults[input.type],
         };
-        this.recordInvocationAudit(invocation, 'llm', completion.model);
+        await this.recordInvocationAudit(invocation, 'llm', completion.model);
       } catch (error) {
         invocation = {
           ...baseInvocation,
@@ -84,7 +91,7 @@ export class AgentService {
               ? redactSensitive({ message: error.message }).message
               : 'LLM invocation failed',
         };
-        this.recordInvocationAudit(invocation, 'llm_failed');
+        await this.recordInvocationAudit(invocation, 'llm_failed');
       }
     } else {
       invocation = {
@@ -92,25 +99,30 @@ export class AgentService {
         status: 'success',
         resultMarkdown: mockResults[input.type],
       };
-      this.recordInvocationAudit(invocation, 'mock', undefined, llmHealth.message);
+      await this.recordInvocationAudit(
+        invocation,
+        'mock',
+        undefined,
+        llmHealth.message,
+      );
     }
 
     this.invocations.unshift(invocation);
     return invocation;
   }
 
-  private recordInvocationAudit(
+  private async recordInvocationAudit(
     invocation: AgentInvocation,
     mode: 'mock' | 'llm' | 'llm_failed',
     model?: string,
     reason?: string,
-  ): void {
+  ): Promise<void> {
     const action =
       invocation.status === 'failed'
         ? 'AGENT_INVOCATION_FAILED'
         : 'AGENT_INVOCATION_CREATED';
 
-    this.auditService.record({
+    await this.auditService.record({
       action,
       resourceType: 'agent_invocation',
       resourceId: invocation.id,
diff --git a/src/audit/audit.controller.ts b/src/audit/audit.controller.ts
index f7e90de..8731a97 100644
--- a/src/audit/audit.controller.ts
+++ b/src/audit/audit.controller.ts
@@ -1,3 +1,6 @@
+/**
+ * 审计日志查询入口只返回脱敏后的最近记录。
+ */
 import { Controller, Get } from '@nestjs/common';
 import { ApiOkResponse, ApiTags } from '@nestjs/swagger';
 import { AuditRecordSummary, AuditService } from './audit.service';
@@ -9,7 +12,7 @@ export class AuditController {
 
   @Get()
   @ApiOkResponse({ description: 'Recent sanitized audit records.' })
-  listRecentRecords(): AuditRecordSummary[] {
+  async listRecentRecords(): Promise<AuditRecordSummary[]> {
     return this.auditService.getRecentRecords();
   }
 }
diff --git a/src/audit/audit.service.spec.ts b/src/audit/audit.service.spec.ts
index 8d36390..4d96f65 100644
--- a/src/audit/audit.service.spec.ts
+++ b/src/audit/audit.service.spec.ts
@@ -4,10 +4,10 @@ import { AuditService } from './audit.service';
  * 审计记录必须先脱敏再暴露给前端或 Agent。
  */
 describe('AuditService', () => {
-  it('stores recent audit records with sensitive values redacted', () => {
+  it('stores recent audit records with sensitive values redacted', async () => {
     const service = new AuditService();
 
-    service.record({
+    await service.record({
       action: 'SECRET_CHANGED',
       resourceType: 'secret',
       parameterDigest: {
@@ -16,7 +16,7 @@ describe('AuditService', () => {
       },
     });
 
-    const [record] = service.getRecentRecords();
+    const [record] = await service.getRecentRecords();
 
     expect(record.action).toBe('SECRET_CHANGED');
     expect(record.parameterDigest).toEqual({
diff --git a/src/audit/audit.service.ts b/src/audit/audit.service.ts
index c097778..3efa644 100644
--- a/src/audit/audit.service.ts
+++ b/src/audit/audit.service.ts
@@ -1,5 +1,13 @@
+/**
+ * 审计服务统一完成敏感信息脱敏、MySQL 持久化和本地降级存储。
+ * 业务服务只提交动作摘要，禁止把 token/webhook/连接串原文写入审计。
+ */
 import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { AuditLog, Prisma } from '@prisma/client';
 import { redactSensitive } from '../common/security/redact-sensitive';
+import { EnvConfig } from '../config/env.schema';
+import { PrismaService } from '../prisma/prisma.service';
 
 export type AuditRecordInput = {
   action: string;
@@ -7,30 +15,154 @@ export type AuditRecordInput = {
   resourceId?: string;
   actorId?: string;
   actorName?: string;
+  requestId?: string;
+  sourceIp?: string;
+  userAgent?: string;
   before?: Record<string, unknown>;
   after?: Record<string, unknown>;
   parameterDigest?: Record<string, unknown>;
 };
 
-export type AuditRecordSummary = AuditRecordInput & { createdAt: string };
+export type AuditRecordSummary = AuditRecordInput & {
+  id: string;
+  createdAt: string;
+};
+
+type SanitizedAuditRecordInput = Omit<
+  AuditRecordInput,
+  'before' | 'after' | 'parameterDigest'
+> & {
+  before?: Prisma.InputJsonValue;
+  after?: Prisma.InputJsonValue;
+  parameterDigest?: Prisma.InputJsonValue;
+};
 
 @Injectable()
 export class AuditService {
   private readonly memoryRecords: AuditRecordSummary[] = [];
 
-  record(input: AuditRecordInput): void {
+  constructor(
+    private readonly config?: ConfigService<EnvConfig, true>,
+    private readonly prisma?: PrismaService,
+  ) {}
+
+  async record(input: AuditRecordInput): Promise<void> {
+    const sanitized = this.sanitize(input);
+    const prisma = this.databaseClient();
+
+    if (!prisma) {
+      this.pushMemoryRecord(sanitized);
+      return;
+    }
+
+    await prisma.auditLog.create({
+      data: {
+        deployRunId:
+          sanitized.resourceType === 'deploy_run'
+            ? sanitized.resourceId
+            : undefined,
+        actorId: sanitized.actorId,
+        actorName: sanitized.actorName,
+        action: sanitized.action,
+        resourceType: sanitized.resourceType,
+        resourceId: sanitized.resourceId,
+        requestId: sanitized.requestId,
+        sourceIp: sanitized.sourceIp,
+        userAgent: sanitized.userAgent,
+        before: sanitized.before,
+        after: sanitized.after,
+        parameterDigest: sanitized.parameterDigest,
+      },
+    });
+  }
+
+  async getRecentRecords(): Promise<AuditRecordSummary[]> {
+    const prisma = this.databaseClient();
+
+    if (prisma) {
+      const records = await prisma.auditLog.findMany({
+        orderBy: {
+          createdAt: 'desc',
+        },
+        take: 50,
+      });
+
+      return records.map((record) => this.toSummary(record));
+    }
+
+    return [...this.memoryRecords].slice(-50).reverse();
+  }
+
+  private sanitize(input: AuditRecordInput): SanitizedAuditRecordInput {
+    return {
+      ...input,
+      before: this.toJsonValue(input.before),
+      after: this.toJsonValue(input.after),
+      parameterDigest: this.toJsonValue(input.parameterDigest),
+    };
+  }
+
+  private toJsonValue(
+    value: Record<string, unknown> | undefined,
+  ): Prisma.InputJsonValue | undefined {
+    if (!value) {
+      return undefined;
+    }
+
+    return JSON.parse(
+      JSON.stringify(redactSensitive(value)),
+    ) as Prisma.InputJsonValue;
+  }
+
+  private pushMemoryRecord(input: SanitizedAuditRecordInput): void {
     this.memoryRecords.push({
       ...input,
-      before: input.before ? redactSensitive(input.before) : undefined,
-      after: input.after ? redactSensitive(input.after) : undefined,
-      parameterDigest: input.parameterDigest
-        ? redactSensitive(input.parameterDigest)
-        : undefined,
+      id: `audit_${Date.now()}_${this.memoryRecords.length + 1}`,
+      before: input.before as Record<string, unknown> | undefined,
+      after: input.after as Record<string, unknown> | undefined,
+      parameterDigest: input.parameterDigest as
+        | Record<string, unknown>
+        | undefined,
       createdAt: new Date().toISOString(),
     });
   }
 
-  getRecentRecords(): AuditRecordSummary[] {
-    return [...this.memoryRecords].slice(-50).reverse();
+  private toSummary(record: AuditLog): AuditRecordSummary {
+    return {
+      id: record.id,
+      action: record.action,
+      resourceType: record.resourceType,
+      resourceId: record.resourceId ?? undefined,
+      actorId: record.actorId ?? undefined,
+      actorName: record.actorName ?? undefined,
+      requestId: record.requestId ?? undefined,
+      sourceIp: record.sourceIp ?? undefined,
+      userAgent: record.userAgent ?? undefined,
+      before: this.jsonToRecord(record.before),
+      after: this.jsonToRecord(record.after),
+      parameterDigest: this.jsonToRecord(record.parameterDigest),
+      createdAt: record.createdAt.toISOString(),
+    };
+  }
+
+  private jsonToRecord(
+    value: Prisma.JsonValue,
+  ): Record<string, unknown> | undefined {
+    if (!value || typeof value !== 'object' || Array.isArray(value)) {
+      return undefined;
+    }
+
+    return value;
+  }
+
+  private databaseClient(): PrismaService | undefined {
+    if (
+      !this.config?.get('USE_DATABASE_READS', { infer: true }) ||
+      !this.config.get('DATABASE_URL', { infer: true })
+    ) {
+      return undefined;
+    }
+
+    return this.prisma;
   }
 }
diff --git a/src/deploy-runs/deploy-execution.service.ts b/src/deploy-runs/deploy-execution.service.ts
index 2d0c4e8..4e2ab2d 100644
--- a/src/deploy-runs/deploy-execution.service.ts
+++ b/src/deploy-runs/deploy-execution.service.ts
@@ -42,7 +42,7 @@ export class DeployExecutionService {
     );
     let currentStep: string | undefined;
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'DEPLOY_EXECUTION_STARTED',
       resourceType: 'deploy_run',
       resourceId: currentRun.id,
@@ -95,7 +95,7 @@ export class DeployExecutionService {
         }),
       );
 
-      this.auditService.record({
+      await this.auditService.record({
         action: 'DEPLOY_SUCCEEDED',
         resourceType: 'deploy_run',
         resourceId: currentRun.id,
@@ -132,7 +132,7 @@ export class DeployExecutionService {
 
       currentRun = await this.advanceNotification(currentRun, 'failed');
 
-      this.auditService.record({
+      await this.auditService.record({
         action: 'DEPLOY_FAILED',
         resourceType: 'deploy_run',
         resourceId: currentRun.id,
@@ -197,7 +197,7 @@ export class DeployExecutionService {
         `Jenkins build #${queueItem.buildNumber} is running.`,
       );
 
-      this.auditService.record({
+      await this.auditService.record({
         action: 'JENKINS_BUILD_STARTED',
         resourceType: 'deploy_run',
         resourceId: currentRun.id,
@@ -268,7 +268,7 @@ export class DeployExecutionService {
         'success',
       );
 
-      this.auditService.record({
+      await this.auditService.record({
         action: 'JENKINS_DRY_RUN_COMPLETED',
         resourceType: 'deploy_run',
         resourceId: run.id,
@@ -316,7 +316,7 @@ export class DeployExecutionService {
         : `Jenkins queue ${queueItem.queueId} accepted.`,
     );
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'JENKINS_BUILD_TRIGGERED',
       resourceType: 'deploy_run',
       resourceId: run.id,
@@ -352,7 +352,7 @@ export class DeployExecutionService {
       notification.status === 'sent' ? undefined : notification.reason,
     );
 
-    this.auditService.record({
+    await this.auditService.record({
       action: `DEPLOY_NOTIFICATION_${notification.status.toUpperCase()}`,
       resourceType: 'deploy_run',
       resourceId: run.id,
@@ -393,7 +393,7 @@ export class DeployExecutionService {
       }),
     );
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'DEPLOY_SUCCEEDED',
       resourceType: 'deploy_run',
       resourceId: currentRun.id,
@@ -429,7 +429,7 @@ export class DeployExecutionService {
       })) ?? currentRun;
     currentRun = await this.advanceNotification(currentRun, 'failed');
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'DEPLOY_FAILED',
       resourceType: 'deploy_run',
       resourceId: currentRun.id,
@@ -538,7 +538,7 @@ export class DeployExecutionService {
     const notification =
       await this.deployNotificationService.sendDeployRunEvent(run, event);
 
-    this.auditService.record({
+    await this.auditService.record({
       action: `DEPLOY_NOTIFICATION_${notification.status.toUpperCase()}`,
       resourceType: 'deploy_run',
       resourceId: run.id,
diff --git a/src/deploy-runs/deploy-runs.service.ts b/src/deploy-runs/deploy-runs.service.ts
index fe708ac..d04ac45 100644
--- a/src/deploy-runs/deploy-runs.service.ts
+++ b/src/deploy-runs/deploy-runs.service.ts
@@ -61,10 +61,10 @@ export class DeployRunsService {
     }
 
     const project = await this.projectsService.getProject(input.projectKey);
-    this.validateReleaseRequest(input, project);
+    await this.validateReleaseRequest(input, project);
     const run = await this.deployRunRepository.create(input);
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'DEPLOY_REQUESTED',
       resourceType: 'deploy_run',
       resourceId: run.id,
@@ -94,7 +94,7 @@ export class DeployRunsService {
       );
     }
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'DEPLOY_CANCELED',
       resourceType: 'deploy_run',
       resourceId: run.id,
@@ -150,7 +150,7 @@ export class DeployRunsService {
       }
     }
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'JENKINS_SYNC_SWEEP_COMPLETED',
       resourceType: 'deploy_run',
       after: {
@@ -175,7 +175,7 @@ export class DeployRunsService {
     const notification =
       await this.deployNotificationService.sendDeployRunEvent(run, event);
 
-    this.auditService.record({
+    await this.auditService.record({
       action: `DEPLOY_NOTIFICATION_${notification.status.toUpperCase()}`,
       resourceType: 'deploy_run',
       resourceId: run.id,
@@ -194,12 +194,12 @@ export class DeployRunsService {
     );
   }
 
-  private validateReleaseRequest(
+  private async validateReleaseRequest(
     input: CreateDeployRunInput,
     project: ProjectSummary,
-  ): ProjectEnvironmentSummary {
+  ): Promise<ProjectEnvironmentSummary> {
     if (project.status !== 'active') {
-      this.recordDeployRejected(input, 'Project is archived');
+      await this.recordDeployRejected(input, 'Project is archived');
       throw new AppError(
         'VALIDATION_FAILED',
         `Project ${project.key} is archived and cannot be deployed`,
@@ -213,7 +213,7 @@ export class DeployRunsService {
     );
 
     if (!environment) {
-      this.recordDeployRejected(input, 'Environment is not configured');
+      await this.recordDeployRejected(input, 'Environment is not configured');
       throw new AppError(
         'VALIDATION_FAILED',
         `Project ${project.key} does not expose ${input.environment} environment`,
@@ -223,7 +223,10 @@ export class DeployRunsService {
     }
 
     if (!new RegExp(environment.refPattern).test(input.ref)) {
-      this.recordDeployRejected(input, 'Ref does not match release policy');
+      await this.recordDeployRejected(
+        input,
+        'Ref does not match release policy',
+      );
       throw new AppError(
         'VALIDATION_FAILED',
         `Ref ${input.ref} does not match ${environment.releasePolicy} release policy`,
@@ -241,11 +244,11 @@ export class DeployRunsService {
     return environment;
   }
 
-  private recordDeployRejected(
+  private async recordDeployRejected(
     input: CreateDeployRunInput,
     reason: string,
-  ): void {
-    this.auditService.record({
+  ): Promise<void> {
+    await this.auditService.record({
       action: 'DEPLOY_REJECTED',
       resourceType: 'deploy_run',
       actorName: input.operator,
diff --git a/src/deploy-runs/jenkins-sync-scheduler.service.ts b/src/deploy-runs/jenkins-sync-scheduler.service.ts
index f9beb77..1f30bb6 100644
--- a/src/deploy-runs/jenkins-sync-scheduler.service.ts
+++ b/src/deploy-runs/jenkins-sync-scheduler.service.ts
@@ -54,7 +54,7 @@ export class JenkinsSyncSchedulerService
     try {
       const summary = await this.deployRunsService.syncJenkinsRuns();
 
-      this.auditService.record({
+      await this.auditService.record({
         action: 'JENKINS_AUTO_SYNC_TICK_COMPLETED',
         resourceType: 'deploy_run',
         after: {
@@ -67,7 +67,7 @@ export class JenkinsSyncSchedulerService
       const message =
         error instanceof Error ? error.message : 'Jenkins auto sync failed';
 
-      this.auditService.record({
+      await this.auditService.record({
         action: 'JENKINS_AUTO_SYNC_TICK_FAILED',
         resourceType: 'deploy_run',
         after: {
diff --git a/src/webhooks/gitea/gitea-webhook.service.ts b/src/webhooks/gitea/gitea-webhook.service.ts
index d80c2ed..84539f7 100644
--- a/src/webhooks/gitea/gitea-webhook.service.ts
+++ b/src/webhooks/gitea/gitea-webhook.service.ts
@@ -32,20 +32,33 @@ export class GiteaWebhookService {
     this.assertSignature(input);
 
     if (input.headers.event !== 'push') {
-      return this.ignore(input.headers, 'Only push events can trigger test deploys');
+      return this.ignore(
+        input.headers,
+        'Only push events can trigger test deploys',
+      );
     }
 
     const payload = this.asPushPayload(input.payload);
 
     if (!payload.ref.startsWith('refs/heads/')) {
-      return this.ignore(input.headers, 'Only branch push events trigger test deploys');
+      return this.ignore(
+        input.headers,
+        'Only branch push events trigger test deploys',
+      );
     }
 
     const branch = payload.ref.replace('refs/heads/', '');
     const projects = await this.projectsService.listProjects();
     const project = projects.find((item) => {
-      const repositoryName = item.repositoryUrl.replace(/\.git$/, '').split('/').pop();
-      const fullName = item.repositoryUrl.replace(/\.git$/, '').split('/').slice(-2).join('/');
+      const repositoryName = item.repositoryUrl
+        .replace(/\.git$/, '')
+        .split('/')
+        .pop();
+      const fullName = item.repositoryUrl
+        .replace(/\.git$/, '')
+        .split('/')
+        .slice(-2)
+        .join('/');
 
       return (
         item.key === payload.repository.name ||
@@ -55,10 +68,17 @@ export class GiteaWebhookService {
     });
 
     if (!project) {
-      return this.ignore(input.headers, 'Repository is not managed by this platform');
+      return this.ignore(
+        input.headers,
+        'Repository is not managed by this platform',
+      );
     }
 
-    const allowedBranches = new Set([project.defaultBranch, 'develop', 'master']);
+    const allowedBranches = new Set([
+      project.defaultBranch,
+      'develop',
+      'master',
+    ]);
 
     if (!allowedBranches.has(branch)) {
       return this.ignore(
@@ -87,7 +107,7 @@ export class GiteaWebhookService {
       trigger: 'gitea_webhook',
     });
 
-    this.auditService.record({
+    await this.auditService.record({
       action: 'GITEA_WEBHOOK_ACCEPTED',
       resourceType: 'deploy_run',
       resourceId: run.id,
@@ -124,32 +144,44 @@ export class GiteaWebhookService {
         hubSignature256: input.headers.hubSignature256,
       })
     ) {
-      throw new AppError('VALIDATION_FAILED', 'Invalid Gitea webhook signature', 401);
+      throw new AppError(
+        'VALIDATION_FAILED',
+        'Invalid Gitea webhook signature',
+        401,
+      );
     }
   }
 
   private asPushPayload(payload: unknown): GiteaPushPayload {
     if (!isRecord(payload) || !isRecord(payload.repository)) {
-      throw new AppError('VALIDATION_FAILED', 'Invalid Gitea push payload', 400);
+      throw new AppError(
+        'VALIDATION_FAILED',
+        'Invalid Gitea push payload',
+        400,
+      );
     }
 
     const ref = typeof payload.ref === 'string' ? payload.ref : '';
     const after = typeof payload.after === 'string' ? payload.after : '';
 
     if (!ref || !after) {
-      throw new AppError('VALIDATION_FAILED', 'Gitea push payload missing ref or after', 400);
+      throw new AppError(
+        'VALIDATION_FAILED',
+        'Gitea push payload missing ref or after',
+        400,
+      );
     }
 
     return payload as GiteaPushPayload;
   }
 
-  private ignore(
+  private async ignore(
     headers: GiteaWebhookHeaders,
     reason: string,
     projectKey?: string,
     branch?: string,
-  ): GiteaWebhookResult {
-    this.auditService.record({
+  ): Promise<GiteaWebhookResult> {
+    await this.auditService.record({
       action: 'GITEA_WEBHOOK_IGNORED',
       resourceType: 'gitea_webhook',
       resourceId: headers.delivery,