feat(api): add agent memory module (MS22-DB-002, MS22-API-002) (#586)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/api/src/agent-memory/agent-memory.controller.ts

@@ -0,0 +1,89 @@
+import {
+  Controller,
+  Get,
+  Put,
+  Delete,
+  Body,
+  Param,
+  UseGuards,
+  HttpCode,
+  HttpStatus,
+} from "@nestjs/common";
+import { AgentMemoryService } from "./agent-memory.service";
+import { UpsertAgentMemoryDto } from "./dto";
+import { AuthGuard } from "../auth/guards/auth.guard";
+import { WorkspaceGuard, PermissionGuard } from "../common/guards";
+import { Workspace, Permission, RequirePermission } from "../common/decorators";
+
+/**
+ * Controller for per-agent key/value memory endpoints.
+ * All endpoints require authentication and workspace context.
+ *
+ * Guards are applied in order:
+ * 1. AuthGuard - Verifies user authentication
+ * 2. WorkspaceGuard - Validates workspace access
+ * 3. PermissionGuard - Checks role-based permissions
+ */
+@Controller("agents/:agentId/memory")
+@UseGuards(AuthGuard, WorkspaceGuard, PermissionGuard)
+export class AgentMemoryController {
+  constructor(private readonly agentMemoryService: AgentMemoryService) {}
+
+  /**
+   * PUT /api/agents/:agentId/memory/:key
+   * Upsert a memory entry for an agent
+   * Requires: MEMBER role or higher
+   */
+  @Put(":key")
+  @RequirePermission(Permission.WORKSPACE_MEMBER)
+  async upsert(
+    @Param("agentId") agentId: string,
+    @Param("key") key: string,
+    @Body() dto: UpsertAgentMemoryDto,
+    @Workspace() workspaceId: string
+  ) {
+    return this.agentMemoryService.upsert(workspaceId, agentId, key, dto);
+  }
+
+  /**
+   * GET /api/agents/:agentId/memory
+   * List all memory entries for an agent
+   * Requires: Any workspace member (including GUEST)
+   */
+  @Get()
+  @RequirePermission(Permission.WORKSPACE_ANY)
+  async findAll(@Param("agentId") agentId: string, @Workspace() workspaceId: string) {
+    return this.agentMemoryService.findAll(workspaceId, agentId);
+  }
+
+  /**
+   * GET /api/agents/:agentId/memory/:key
+   * Get a single memory entry by key
+   * Requires: Any workspace member (including GUEST)
+   */
+  @Get(":key")
+  @RequirePermission(Permission.WORKSPACE_ANY)
+  async findOne(
+    @Param("agentId") agentId: string,
+    @Param("key") key: string,
+    @Workspace() workspaceId: string
+  ) {
+    return this.agentMemoryService.findOne(workspaceId, agentId, key);
+  }
+
+  /**
+   * DELETE /api/agents/:agentId/memory/:key
+   * Remove a memory entry
+   * Requires: MEMBER role or higher
+   */
+  @Delete(":key")
+  @HttpCode(HttpStatus.OK)
+  @RequirePermission(Permission.WORKSPACE_MEMBER)
+  async remove(
+    @Param("agentId") agentId: string,
+    @Param("key") key: string,
+    @Workspace() workspaceId: string
+  ) {
+    return this.agentMemoryService.remove(workspaceId, agentId, key);
+  }
+}