diff --git a/src/agent/agent.module.ts b/src/agent/agent.module.ts
index 5ea63f0..3eb2d4c 100644
--- a/src/agent/agent.module.ts
+++ b/src/agent/agent.module.ts
@@ -2,12 +2,20 @@ import { Module } from '@nestjs/common';
 import { AgentConfigModule } from '../agent-config/agent-config.module';
 import { AuditModule } from '../audit/audit.module';
 import { AuthModule } from '../auth/auth.module';
+import { DeployRunsModule } from '../deploy-runs/deploy-runs.module';
+import { ProjectsModule } from '../projects/projects.module';
 import { AgentController } from './agent.controller';
 import { AgentService } from './agent.service';
 import { LlmClient } from './llm.client';
 
 @Module({
-  imports: [AgentConfigModule, AuditModule, AuthModule],
+  imports: [
+    AgentConfigModule,
+    AuditModule,
+    AuthModule,
+    DeployRunsModule,
+    ProjectsModule,
+  ],
   controllers: [AgentController],
   providers: [AgentService, LlmClient],
   exports: [AgentService, LlmClient],
diff --git a/src/agent/agent.service.spec.ts b/src/agent/agent.service.spec.ts
index ece435b..f4fe4e3 100644
--- a/src/agent/agent.service.spec.ts
+++ b/src/agent/agent.service.spec.ts
@@ -2,6 +2,8 @@ import { AuditService } from '../audit/audit.service';
 import { AuthService } from '../auth/auth.service';
 import { AuthenticatedUser } from '../auth/auth.types';
 import { AppError } from '../common/errors/app-error';
+import { DeployRunsService } from '../deploy-runs/deploy-runs.service';
+import { ProjectsService } from '../projects/projects.service';
 import { AgentService } from './agent.service';
 import { CreateAgentInvocationInput } from './create-agent-invocation.dto';
 import { LlmClient } from './llm.client';
@@ -48,15 +50,69 @@ describe('AgentService', () => {
     const auth = {
       requireProjectPermission: jest.fn(() => Promise.resolve()),
     } satisfies Pick<AuthService, 'requireProjectPermission'>;
+    const deployRuns = {
+      getRun: jest.fn((id: string) =>
+        Promise.resolve({
+          id,
+          projectKey: 'role-user',
+          environment: 'production' as const,
+          ref: 'master',
+          status: 'failed' as const,
+          trigger: 'manual' as const,
+          operator: 'codex',
+          jenkinsBuildNumber: 18,
+          failureSummary: 'Jenkins 构建失败',
+          createdAt: '2026-06-12T00:00:00.000Z',
+          steps: [],
+        }),
+      ),
+      getJenkinsLog: jest.fn((id: string) =>
+        Promise.resolve({
+          runId: id,
+          jobPath: 'devops-platform/prod-role-user-master',
+          buildNumber: 18,
+          start: 0,
+          nextStart: 1024,
+          hasMore: false,
+          text: 'Started by user codex\nFinished: FAILURE',
+          fetchedAt: '2026-06-12T00:00:01.000Z',
+        }),
+      ),
+    } satisfies Pick<DeployRunsService, 'getRun' | 'getJenkinsLog'>;
+    const projects = {
+      getProject: jest.fn((key: string) =>
+        Promise.resolve({
+          id: `project_${key}`,
+          key,
+          name: key,
+          repositoryUrl: `https://gitea.ops.mrzhan.top/my-project/${key}.git`,
+          defaultBranch: key === 'my-resume' ? 'master' : 'develop',
+          status: 'active' as const,
+          environments: [
+            {
+              name: 'production' as const,
+              displayName: '生产环境',
+              jenkinsJobPath: `devops-platform/prod-${key}-master`,
+              releasePolicy: 'master' as const,
+              refPattern: '^master$',
+            },
+          ],
+        }),
+      ),
+    } satisfies Pick<ProjectsService, 'getProject'>;
 
     return {
       audit,
       auth,
+      deployRuns,
       llm,
+      projects,
       service: new AgentService(
         audit as unknown as AuditService,
         llm as unknown as LlmClient,
         auth as unknown as AuthService,
+        deployRuns as unknown as DeployRunsService,
+        projects as unknown as ProjectsService,
       ),
     };
   }
@@ -108,7 +164,8 @@ describe('AgentService', () => {
     expect(llm.complete).toHaveBeenCalledWith(
       expect.objectContaining({
         purpose: 'release-risk',
-        promptVersion: 'devops-agent-v1',
+        promptVersion: 'devops-agent-v2',
+        userPrompt: expect.stringContaining('## 项目上下文'),
       }),
     );
     expect(audit.record).toHaveBeenCalledWith(
diff --git a/src/agent/agent.service.ts b/src/agent/agent.service.ts
index e0ec7cc..791f917 100644
--- a/src/agent/agent.service.ts
+++ b/src/agent/agent.service.ts
@@ -1,9 +1,16 @@
+/**
+ * DevOps Agent 后端编排层，负责把发布单、项目和 Jenkins 日志整理为受控上下文。
+ */
 import { Injectable } from '@nestjs/common';
 import { AuthService } from '../auth/auth.service';
 import { AuthenticatedUser } from '../auth/auth.types';
 import { AppError } from '../common/errors/app-error';
 import { AuditService } from '../audit/audit.service';
 import { redactSensitive } from '../common/security/redact-sensitive';
+import { DeployRunSummary } from '../deploy-runs/deploy-run.types';
+import { DeployRunsService } from '../deploy-runs/deploy-runs.service';
+import { ProjectSummary } from '../projects/project.types';
+import { ProjectsService } from '../projects/projects.service';
 import { AgentInvocation, AgentPurpose } from './agent.types';
 import { CreateAgentInvocationInput } from './create-agent-invocation.dto';
 import { LlmClient } from './llm.client';
@@ -15,6 +22,27 @@ const allowedTypes: AgentPurpose[] = [
   'release-note',
   'incident-review',
 ];
+const contextRequiredRunTypes = new Set<AgentPurpose>([
+  'failure-diagnosis',
+  'incident-review',
+]);
+const contextRequiredProjectTypes = new Set<AgentPurpose>([
+  'release-risk',
+  'release-note',
+]);
+const jenkinsLogContextLimit = 12000;
+
+type AgentInvocationContext = {
+  project?: ProjectSummary;
+  run?: DeployRunSummary;
+  jenkinsLog?: {
+    buildNumber: number;
+    hasMore: boolean;
+    nextStart: number;
+    text: string;
+  };
+  warnings: string[];
+};
 
 @Injectable()
 export class AgentService {
@@ -24,6 +52,8 @@ export class AgentService {
     private readonly auditService: AuditService,
     private readonly llmClient: LlmClient,
     private readonly authService: AuthService,
+    private readonly deployRunsService: DeployRunsService,
+    private readonly projectsService: ProjectsService,
   ) {}
 
   listInvocations(): AgentInvocation[] {
@@ -49,12 +79,19 @@ export class AgentService {
 
     await this.validateAgentScope(input, operator);
     const llmHealth = await this.llmClient.healthSummary();
+    const context = await this.buildInvocationContext(
+      input,
+      operator,
+      llmHealth.status === 'ok',
+    );
+    const contextSummary = this.contextSummaryFor(context);
     const baseInvocation = {
       id: `agent_${Date.now()}_${this.invocations.length + 1}`,
-      runId: input.runId,
-      projectKey: input.projectKey,
+      runId: context.run?.id ?? input.runId,
+      projectKey: context.project?.key ?? input.projectKey,
       type: input.type,
       promptSummary: input.promptSummary,
+      contextSummary,
       createdAt: new Date().toISOString(),
     };
     let invocation: AgentInvocation;
@@ -63,9 +100,9 @@ export class AgentService {
       try {
         const completion = await this.llmClient.complete({
           purpose: input.type,
-          promptVersion: 'devops-agent-v1',
+          promptVersion: 'devops-agent-v2',
           systemPrompt: this.systemPromptFor(input.type),
-          userPrompt: this.userPromptFor(input),
+          userPrompt: this.userPromptFor(input, context),
         });
 
         invocation = {
@@ -78,6 +115,7 @@ export class AgentService {
           operator,
           'llm',
           completion.model,
+          contextSummary,
         );
       } catch (error) {
         invocation = {
@@ -88,7 +126,13 @@ export class AgentService {
               ? redactSensitive({ message: error.message }).message
               : 'Agent 调用失败',
         };
-        await this.recordInvocationAudit(invocation, operator, 'llm_failed');
+        await this.recordInvocationAudit(
+          invocation,
+          operator,
+          'llm_failed',
+          undefined,
+          contextSummary,
+        );
       }
     } else {
       invocation = {
@@ -102,6 +146,7 @@ export class AgentService {
         operator,
         'not_configured',
         undefined,
+        contextSummary,
         llmHealth.message,
       );
     }
@@ -118,7 +163,7 @@ export class AgentService {
       return;
     }
 
-    if (!input.projectKey) {
+    if (!input.projectKey && !input.runId) {
       throw new AppError(
         'FORBIDDEN',
         '普通成员只能在已授权项目内使用 Agent',
@@ -126,11 +171,13 @@ export class AgentService {
       );
     }
 
-    await this.authService.requireProjectPermission(
-      operator,
-      input.projectKey,
-      'read',
-    );
+    if (input.projectKey) {
+      await this.authService.requireProjectPermission(
+        operator,
+        input.projectKey,
+        'read',
+      );
+    }
   }
 
   private async recordInvocationAudit(
@@ -138,6 +185,7 @@ export class AgentService {
     operator: AuthenticatedUser,
     mode: 'llm' | 'llm_failed' | 'not_configured',
     model?: string,
+    contextSummary?: string,
     reason?: string,
   ): Promise<void> {
     const action =
@@ -157,10 +205,12 @@ export class AgentService {
         projectKey: invocation.projectKey,
         mode,
         model,
+        contextSummary,
         reason,
       },
       parameterDigest: {
         promptSummary: invocation.promptSummary,
+        contextSummary,
       },
     });
   }
@@ -174,11 +224,208 @@ export class AgentService {
     ].join('\n');
   }
 
-  private userPromptFor(input: CreateAgentInvocationInput): string {
+  private async buildInvocationContext(
+    input: CreateAgentInvocationInput,
+    operator: AuthenticatedUser,
+    includeJenkinsLog: boolean,
+  ): Promise<AgentInvocationContext> {
+    if (contextRequiredRunTypes.has(input.type) && !input.runId) {
+      throw new AppError(
+        'VALIDATION_FAILED',
+        '该 Agent 能力必须选择发布记录 Run',
+        400,
+        { type: input.type },
+      );
+    }
+
+    if (
+      contextRequiredProjectTypes.has(input.type) &&
+      !input.projectKey &&
+      !input.runId
+    ) {
+      throw new AppError(
+        'VALIDATION_FAILED',
+        '该 Agent 能力必须选择项目或发布记录 Run',
+        400,
+        { type: input.type },
+      );
+    }
+
+    const warnings: string[] = [];
+    const run = input.runId
+      ? await this.deployRunsService.getRun(input.runId, operator)
+      : undefined;
+    const projectKey = input.projectKey ?? run?.projectKey;
+
+    if (input.projectKey && run && input.projectKey !== run.projectKey) {
+      throw new AppError(
+        'VALIDATION_FAILED',
+        'Agent 请求中的项目与发布记录不匹配',
+        400,
+        {
+          projectKey: input.projectKey,
+          runProjectKey: run.projectKey,
+          runId: run.id,
+        },
+      );
+    }
+
+    const project = projectKey
+      ? await this.projectsService.getProject(projectKey, operator)
+      : undefined;
+    const context: AgentInvocationContext = {
+      project,
+      run,
+      warnings,
+    };
+
+    if (!includeJenkinsLog || !run?.jenkinsBuildNumber) {
+      if (run && !run.jenkinsBuildNumber) {
+        warnings.push('当前 Run 尚未关联 Jenkins build，无法提供完整构建日志。');
+      }
+
+      return context;
+    }
+
+    try {
+      const log = await this.deployRunsService.getJenkinsLog(run.id, '0', operator);
+      context.jenkinsLog = {
+        buildNumber: log.buildNumber,
+        hasMore: log.hasMore,
+        nextStart: log.nextStart,
+        text: this.takeLogTail(log.text),
+      };
+    } catch (error) {
+      warnings.push(`Jenkins 日志读取失败：${this.safeErrorMessage(error)}`);
+    }
+
+    return context;
+  }
+
+  private contextSummaryFor(context: AgentInvocationContext): string {
+    const parts = [
+      context.project ? `project=${context.project.key}` : undefined,
+      context.run
+        ? `run=${context.run.id} status=${context.run.status} ref=${context.run.ref}`
+        : undefined,
+      context.jenkinsLog
+        ? `jenkinsBuild=#${context.jenkinsLog.buildNumber} logChars=${context.jenkinsLog.text.length}`
+        : undefined,
+      context.warnings.length ? `warnings=${context.warnings.length}` : undefined,
+    ].filter(Boolean);
+
+    return parts.length ? parts.join('；') : '未绑定项目上下文';
+  }
+
+  private userPromptFor(
+    input: CreateAgentInvocationInput,
+    context: AgentInvocationContext,
+  ): string {
+    return redactSensitive(
+      [
+        '## 用户任务',
+        input.promptSummary,
+        '',
+        '## 项目上下文',
+        this.projectContextLines(context.project).join('\n') || '未指定项目。',
+        '',
+        '## 发布记录上下文',
+        this.runContextLines(context.run).join('\n') || '未指定发布记录。',
+        '',
+        '## BPMN 步骤',
+        this.stepContextLines(context.run).join('\n') || '未提供步骤。',
+        '',
+        '## Jenkins 构建日志',
+        this.jenkinsLogContextLines(context).join('\n') || '未提供 Jenkins 日志。',
+        '',
+        '## 上下文警告',
+        context.warnings.join('\n') || '无。',
+      ].join('\n'),
+    );
+  }
+
+  private projectContextLines(project?: ProjectSummary): string[] {
+    if (!project) {
+      return [];
+    }
+
     return [
-      `项目：${input.projectKey ?? '未指定'}`,
-      `Run：${input.runId ?? '未指定'}`,
-      `用户输入：${input.promptSummary}`,
-    ].join('\n');
+      `项目 key：${project.key}`,
+      `项目名称：${project.name}`,
+      `仓库：${project.repositoryUrl}`,
+      `默认分支：${project.defaultBranch}`,
+      `状态：${project.status}`,
+      `环境：${project.environments
+        .map(
+          (environment) =>
+            `${environment.name}/${environment.releasePolicy}/${environment.jenkinsJobPath}`,
+        )
+        .join('；')}`,
+    ];
+  }
+
+  private runContextLines(run?: DeployRunSummary): string[] {
+    if (!run) {
+      return [];
+    }
+
+    return [
+      `Run ID：${run.id}`,
+      `项目：${run.projectKey}`,
+      `环境：${run.environment}`,
+      `ref：${run.ref}`,
+      `状态：${run.status}`,
+      `触发方式：${run.trigger}`,
+      `操作者：${run.operator}`,
+      `Jenkins queue：${run.jenkinsQueueId ?? '无'}`,
+      `Jenkins build：${run.jenkinsBuildNumber ?? '无'}`,
+      `失败摘要：${run.failureSummary ?? '无'}`,
+      `开始时间：${run.startedAt ?? '未开始'}`,
+      `结束时间：${run.finishedAt ?? '未结束'}`,
+    ];
+  }
+
+  private stepContextLines(run?: DeployRunSummary): string[] {
+    if (!run) {
+      return [];
+    }
+
+    return run.steps.map((step) =>
+      [
+        `- ${step.bpmnNodeId}`,
+        `name=${step.name}`,
+        `status=${step.status}`,
+        step.message ? `message=${step.message}` : undefined,
+        step.errorSummary ? `error=${step.errorSummary}` : undefined,
+        step.logExcerpt ? `log=${step.logExcerpt}` : undefined,
+      ]
+        .filter(Boolean)
+        .join('；'),
+    );
+  }
+
+  private jenkinsLogContextLines(context: AgentInvocationContext): string[] {
+    if (!context.jenkinsLog) {
+      return [];
+    }
+
+    return [
+      `Build：#${context.jenkinsLog.buildNumber}`,
+      `hasMore：${context.jenkinsLog.hasMore}`,
+      `nextStart：${context.jenkinsLog.nextStart}`,
+      '日志尾部：',
+      context.jenkinsLog.text,
+    ];
+  }
+
+  private takeLogTail(text: string): string {
+    return text.length <= jenkinsLogContextLimit
+      ? text
+      : text.slice(text.length - jenkinsLogContextLimit);
+  }
+
+  private safeErrorMessage(error: unknown): string {
+    const message = error instanceof Error ? error.message : '未知错误';
+    return redactSensitive({ message }).message;
   }
 }
diff --git a/src/agent/agent.types.ts b/src/agent/agent.types.ts
index 77247b1..33ec7ec 100644
--- a/src/agent/agent.types.ts
+++ b/src/agent/agent.types.ts
@@ -1,3 +1,6 @@
+/**
+ * DevOps Agent 的输入输出模型，调用范围必须保持在发布、构建和运维诊断内。
+ */
 export type AgentPurpose =
   | 'release-risk'
   | 'failure-diagnosis'
@@ -27,6 +30,7 @@ export type AgentInvocation = {
   type: AgentPurpose;
   status: AgentInvocationStatus;
   promptSummary: string;
+  contextSummary?: string;
   resultMarkdown?: string;
   createdAt: string;
 };