Phase 4: activity log — who did what in the workspace

- activity_log table (sqlite + pg, structurally identical; schema-parity
  covers it). Plain-text columns, no FKs — an append-only trail that must
  outlive the projects/users it references, so target_label snapshots a
  human-readable name at write time.
- ActivityRepository: record() (fire-and-forget, never breaks the caller) +
  list() (org-scoped, actor/action filters, keyset pagination) + listActors().
- Recording wired into the mutations worth tracking: project
  create/archive/restore/domain, audit start, team user create/remove/
  password-reset, invitation sent.
- getActivityLog / getActivityActors server functions (owner/admin gated) +
  Settings → Activity tab (ActivityLogView: filter by user & action, load
  more).
- Migration: drizzle/0045_*, drizzle-pg/0023_*. The pipeline does not run
  migrations — see docs/SELF_HOSTING_TEAM_MODE.md step 5 for the one-time
  `drizzle-kit migrate` on the server. Writes fail silently until the table
  exists.

tsc / oxlint / knip clean. New ActivityRepository.test.ts (4) + schema-parity
picks up the new table; suite otherwise unchanged (pre-existing samSkills
CRLF failure only).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/SELF_HOSTING_TEAM_MODE.md

@@ -69,6 +69,25 @@ Removing a user drops their membership and signs them out everywhere. Their
 `user` row is kept so past activity still attributes correctly; re-adding them
 issues a fresh password.
 
+## 5. Activity log
+
+**Settings → Activity** (owner/admin only) shows who did what — projects
+created/archived, site audits started, users added/removed, invitations sent —
+filterable by user and action.
+
+It writes to a new `activity_log` table, so **run the migration once** after
+deploying:
+
+```sh
+cd /home/dev/DOCKER/OPEN-SEO/open-seo
+export $(grep -E '^DATABASE_URL=' .env | xargs)
+pnpm exec drizzle-kit migrate --config drizzle-pg.config.ts
+pm2 restart OPEN-SEO
+```
+
+Until the table exists, the writes fail silently (logged to the console) and the
+app keeps working; the Activity tab just shows nothing.
+
 ## Notes
 
 - Password reset by email is not available in `team` mode. The owner/admins

drizzle-pg/0023_clever_prowler.sql

@@ -0,0 +1,16 @@
+CREATE TABLE "activity_log" (
+	"id" text PRIMARY KEY NOT NULL,
+	"organization_id" text NOT NULL,
+	"actor_user_id" text NOT NULL,
+	"actor_email" text NOT NULL,
+	"action" text NOT NULL,
+	"target_type" text,
+	"target_id" text,
+	"target_label" text,
+	"metadata" text,
+	"ip_address" text,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE INDEX "activity_log_org_created_at_idx" ON "activity_log" USING btree ("organization_id","created_at");--> statement-breakpoint
+CREATE INDEX "activity_log_org_actor_idx" ON "activity_log" USING btree ("organization_id","actor_user_id");

drizzle-pg/meta/_journal.json

@@ -162,6 +162,13 @@
       "when": 1787773500453,
       "tag": "0022_third_supernaut",
       "breakpoints": true
+    },
+    {
+      "idx": 23,
+      "version": "7",
+      "when": 1788983569510,
+      "tag": "0023_clever_prowler",
+      "breakpoints": true
     }
   ]
 }

drizzle/0045_noisy_ghost_rider.sql

@@ -0,0 +1,16 @@
+CREATE TABLE `activity_log` (
+	`id` text PRIMARY KEY NOT NULL,
+	`organization_id` text NOT NULL,
+	`actor_user_id` text NOT NULL,
+	`actor_email` text NOT NULL,
+	`action` text NOT NULL,
+	`target_type` text,
+	`target_id` text,
+	`target_label` text,
+	`metadata` text,
+	`ip_address` text,
+	`created_at` integer DEFAULT (cast(unixepoch('subsecond') * 1000 as integer)) NOT NULL
+);
+--> statement-breakpoint
+CREATE INDEX `activity_log_org_created_at_idx` ON `activity_log` (`organization_id`,`created_at`);--> statement-breakpoint
+CREATE INDEX `activity_log_org_actor_idx` ON `activity_log` (`organization_id`,`actor_user_id`);

drizzle/meta/_journal.json

@@ -316,6 +316,13 @@
       "when": 1787773498579,
       "tag": "0044_outstanding_sage",
       "breakpoints": true
+    },
+    {
+      "idx": 45,
+      "version": "6",
+      "when": 1788983568067,
+      "tag": "0045_noisy_ghost_rider",
+      "breakpoints": true
     }
   ]
 }

src/client/features/activity/ActivityLogView.tsx

@@ -0,0 +1,158 @@
+import { useInfiniteQuery, useQuery } from "@tanstack/react-query";
+import { useState } from "react";
+import { getActivityActors, getActivityLog } from "@/serverFunctions/activity";
+
+type ActivityItem = Awaited<ReturnType<typeof getActivityLog>>["items"][number];
+
+// Human phrasing for the stored action codes.
+const ACTION_LABELS: Record<string, string> = {
+  "project.create": "created a project",
+  "project.archive": "archived a project",
+  "project.restore": "restored a project",
+  "project.domain_set": "set a project domain",
+  "audit.start": "started a site audit",
+  "team.user_created": "added a user",
+  "team.user_removed": "removed a user",
+  "team.password_reset": "reset a password",
+  "team.invitation_sent": "sent an invitation",
+};
+
+const ACTION_OPTIONS = Object.entries(ACTION_LABELS);
+
+function actionLabel(action: string) {
+  return ACTION_LABELS[action] ?? action;
+}
+
+function describeTarget(item: ActivityItem) {
+  return item.targetLabel ?? item.targetId ?? "";
+}
+
+// Owner/admin view of who did what in the workspace.
+export function ActivityLogView() {
+  const [actorUserId, setActorUserId] = useState("");
+  const [action, setAction] = useState("");
+
+  const actorsQuery = useQuery({
+    queryKey: ["activity-actors"],
+    queryFn: () => getActivityActors(),
+  });
+
+  const logQuery = useInfiniteQuery({
+    queryKey: ["activity-log", actorUserId, action],
+    initialPageParam: undefined as string | undefined,
+    queryFn: ({ pageParam }) =>
+      getActivityLog({
+        data: {
+          actorUserId: actorUserId || undefined,
+          action: action || undefined,
+          before: pageParam,
+          limit: 50,
+        },
+      }),
+    getNextPageParam: (lastPage) => lastPage.nextCursor ?? undefined,
+  });
+
+  if (logQuery.isError) {
+    return (
+      <div className="space-y-3">
+        <p className="text-sm text-base-content/70">
+          We couldn&rsquo;t load the activity log.
+        </p>
+        <button
+          type="button"
+          className="btn btn-soft btn-sm"
+          onClick={() => void logQuery.refetch()}
+        >
+          Try again
+        </button>
+      </div>
+    );
+  }
+
+  const rows = logQuery.data?.pages.flatMap((page) => page.items) ?? [];
+
+  return (
+    <section className="space-y-3">
+      <h2 className="text-sm font-medium text-base-content/50">Activity</h2>
+
+      <div className="flex flex-wrap gap-2">
+        <select
+          className="select select-bordered select-sm"
+          value={actorUserId}
+          onChange={(event) => setActorUserId(event.target.value)}
+          aria-label="Filter by user"
+        >
+          <option value="">All users</option>
+          {(actorsQuery.data ?? []).map((actor) => (
+            <option key={actor.actorUserId} value={actor.actorUserId}>
+              {actor.actorEmail}
+            </option>
+          ))}
+        </select>
+        <select
+          className="select select-bordered select-sm"
+          value={action}
+          onChange={(event) => setAction(event.target.value)}
+          aria-label="Filter by action"
+        >
+          <option value="">All actions</option>
+          {ACTION_OPTIONS.map(([value, label]) => (
+            <option key={value} value={value}>
+              {label}
+            </option>
+          ))}
+        </select>
+      </div>
+
+      {logQuery.isPending ? (
+        <div className="flex justify-center py-6">
+          <span className="loading loading-spinner loading-md" />
+        </div>
+      ) : rows.length === 0 ? (
+        <p className="py-6 text-center text-sm text-base-content/60">
+          No activity recorded yet.
+        </p>
+      ) : (
+        <div className="overflow-x-auto rounded-lg border border-base-300">
+          <table className="table table-sm">
+            <thead>
+              <tr>
+                <th>When</th>
+                <th>User</th>
+                <th>Action</th>
+                <th>Target</th>
+              </tr>
+            </thead>
+            <tbody>
+              {rows.map((item) => (
+                <tr key={item.id}>
+                  <td className="whitespace-nowrap text-xs text-base-content/60">
+                    {new Date(item.createdAt).toLocaleString()}
+                  </td>
+                  <td className="text-xs">{item.actorEmail}</td>
+                  <td>{actionLabel(item.action)}</td>
+                  <td className="text-xs text-base-content/70">
+                    {describeTarget(item)}
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {logQuery.hasNextPage ? (
+        <div className="flex justify-center">
+          <button
+            type="button"
+            className="btn btn-soft btn-sm"
+            disabled={logQuery.isFetchingNextPage}
+            onClick={() => void logQuery.fetchNextPage()}
+          >
+            {logQuery.isFetchingNextPage ? "Loading…" : "Load more"}
+          </button>
+        </div>
+      ) : null}
+    </section>
+  );
+}

src/db/activity.schema.ts

@@ -0,0 +1,35 @@
+import { sql } from "drizzle-orm";
+import { index, integer, sqliteTable, text } from "drizzle-orm/sqlite-core";
+
+// Append-only record of who did what in a workspace. Columns are plain text (no
+// FKs): the log must outlive the rows it references — a deleted project or a
+// removed teammate should still show in history — so target_label carries a
+// human-readable snapshot taken at write time.
+export const activityLog = sqliteTable(
+  "activity_log",
+  {
+    id: text("id").primaryKey(),
+    organizationId: text("organization_id").notNull(),
+    actorUserId: text("actor_user_id").notNull(),
+    actorEmail: text("actor_email").notNull(),
+    action: text("action").notNull(),
+    targetType: text("target_type"),
+    targetId: text("target_id"),
+    targetLabel: text("target_label"),
+    metadata: text("metadata"),
+    ipAddress: text("ip_address"),
+    createdAt: integer("created_at", { mode: "timestamp_ms" })
+      .default(sql`(cast(unixepoch('subsecond') * 1000 as integer))`)
+      .notNull(),
+  },
+  (table) => [
+    index("activity_log_org_created_at_idx").on(
+      table.organizationId,
+      table.createdAt,
+    ),
+    index("activity_log_org_actor_idx").on(
+      table.organizationId,
+      table.actorUserId,
+    ),
+  ],
+);

src/db/d1/schema.ts

@@ -2,6 +2,7 @@
 // which is the provider-aware barrel) so the D1 client always binds to the
 // SQLite tables regardless of DATABASE_PROVIDER.
 export * from "../app.schema";
+export * from "../activity.schema";
 export * from "../project-context.schema";
 export * from "../audit.schema";
 export * from "../sam.schema";

src/db/pg/activity.schema.ts

@@ -0,0 +1,32 @@
+import { index, pgTable, text, timestamp } from "drizzle-orm/pg-core";
+
+// Postgres mirror of ../activity.schema.ts — kept structurally identical
+// (schema-parity.test.ts enforces this).
+export const activityLog = pgTable(
+  "activity_log",
+  {
+    id: text("id").primaryKey(),
+    organizationId: text("organization_id").notNull(),
+    actorUserId: text("actor_user_id").notNull(),
+    actorEmail: text("actor_email").notNull(),
+    action: text("action").notNull(),
+    targetType: text("target_type"),
+    targetId: text("target_id"),
+    targetLabel: text("target_label"),
+    metadata: text("metadata"),
+    ipAddress: text("ip_address"),
+    createdAt: timestamp("created_at", { mode: "date", withTimezone: true })
+      .defaultNow()
+      .notNull(),
+  },
+  (table) => [
+    index("activity_log_org_created_at_idx").on(
+      table.organizationId,
+      table.createdAt,
+    ),
+    index("activity_log_org_actor_idx").on(
+      table.organizationId,
+      table.actorUserId,
+    ),
+  ],
+);

src/db/pg/schema.ts

@@ -1,4 +1,5 @@
 export * from "./app.schema";
+export * from "./activity.schema";
 export * from "./project-context.schema";
 export * from "./audit.schema";
 export * from "./sam.schema";

src/db/schema-parity.test.ts

@@ -5,6 +5,7 @@ import { getTableConfig as getSqliteTableConfig } from "drizzle-orm/sqlite-core"
 import { getTableConfig as getPgTableConfig } from "drizzle-orm/pg-core";
 import { sort } from "remeda";
 import { describe, expect, it } from "vitest";
+import * as sqliteActivity from "./activity.schema";
 import * as sqliteApp from "./app.schema";
 import * as sqliteProjectContext from "./project-context.schema";
 import * as sqliteAudit from "./audit.schema";
@@ -14,6 +15,7 @@ import * as sqliteBilling from "./billing.schema";
 import * as sqliteGa4 from "./ga4.schema";
 import * as sqliteGsc from "./gsc.schema";
 import * as sqliteTelemetry from "./telemetry.schema";
+import * as pgActivity from "./pg/activity.schema";
 import * as pgApp from "./pg/app.schema";
 import * as pgProjectContext from "./pg/project-context.schema";
 import * as pgAudit from "./pg/audit.schema";
@@ -146,6 +148,7 @@ function checkNames(table: Table, dialect: Dialect): string[] {
 
 const sqliteAppTables = tablesFrom(
   sqliteApp,
+  sqliteActivity,
   sqliteProjectContext,
   sqliteAudit,
   sqliteSam,
@@ -156,6 +159,7 @@ const sqliteAppTables = tablesFrom(
 );
 const pgAppTables = tablesFrom(
   pgApp,
+  pgActivity,
   pgProjectContext,
   pgAudit,
   pgSam,

src/db/schema.ts

@@ -1,4 +1,5 @@
 import { getDatabaseProvider } from "./provider";
+import * as sqliteActivity from "./activity.schema";
 import * as sqliteApp from "./app.schema";
 import * as sqliteProjectContext from "./project-context.schema";
 import * as sqliteAudit from "./audit.schema";
@@ -8,6 +9,7 @@ import * as sqliteBilling from "./billing.schema";
 import * as sqliteGa4 from "./ga4.schema";
 import * as sqliteGsc from "./gsc.schema";
 import * as sqliteTelemetry from "./telemetry.schema";
+import * as pgActivity from "./pg/activity.schema";
 import * as pgApp from "./pg/app.schema";
 import * as pgProjectContext from "./pg/project-context.schema";
 import * as pgAudit from "./pg/audit.schema";
@@ -29,6 +31,7 @@ import * as pgTelemetry from "./pg/telemetry.schema";
 // schema is the one structural artifact NOT regenerated by `db:generate`, so the
 // parity test is its drift guard.
 type AppSchema = typeof sqliteApp &
+  typeof sqliteActivity &
   typeof sqliteProjectContext &
   typeof sqliteAudit &
   typeof sqliteSam &
@@ -42,6 +45,7 @@ const runtimeSchema =
   getDatabaseProvider() === "postgres"
     ? {
         ...pgApp,
+        ...pgActivity,
         ...pgProjectContext,
         ...pgAudit,
         ...pgSam,
@@ -53,6 +57,7 @@ const runtimeSchema =
       }
     : {
         ...sqliteApp,
+        ...sqliteActivity,
         ...sqliteProjectContext,
         ...sqliteAudit,
         ...sqliteSam,
@@ -67,6 +72,7 @@ const runtimeSchema =
 const schema = runtimeSchema as unknown as AppSchema;
 
 export const {
+  activityLog,
   userOnboardingAnswers,
   projects,
   savedKeywords,

src/routeTree.gen.ts

@@ -40,6 +40,7 @@ import { Route as ApiAuthSplatRouteImport } from './routes/api/auth/$'
 import { Route as AuthenticatedOnboardingChatRouteImport } from './routes/_authenticated.onboarding.chat'
 import { Route as AppSettingsUsersRouteImport } from './routes/_app/settings/users'
 import { Route as AppSettingsOrganizationRouteImport } from './routes/_app/settings/organization'
+import { Route as AppSettingsActivityRouteImport } from './routes/_app/settings/activity'
 import { Route as AppHelpOpenrouterApiKeyRouteImport } from './routes/_app/help/openrouter-api-key'
 import { Route as AppHelpDataforseoApiKeyRouteImport } from './routes/_app/help/dataforseo-api-key'
 import { Route as ProjectPProjectIdRouteRouteImport } from './routes/_project/p/$projectId/route'
@@ -220,6 +221,11 @@ const AppSettingsOrganizationRoute = AppSettingsOrganizationRouteImport.update({
   path: '/organization',
   getParentRoute: () => AppSettingsRoute,
 } as any)
+const AppSettingsActivityRoute = AppSettingsActivityRouteImport.update({
+  id: '/activity',
+  path: '/activity',
+  getParentRoute: () => AppSettingsRoute,
+} as any)
 const AppHelpOpenrouterApiKeyRoute = AppHelpOpenrouterApiKeyRouteImport.update({
   id: '/help/openrouter-api-key',
   path: '/help/openrouter-api-key',
@@ -379,6 +385,7 @@ export interface FileRoutesByFullPath {
   '/p/$projectId': typeof ProjectPProjectIdRouteRouteWithChildren
   '/help/dataforseo-api-key': typeof AppHelpDataforseoApiKeyRoute
   '/help/openrouter-api-key': typeof AppHelpOpenrouterApiKeyRoute
+  '/settings/activity': typeof AppSettingsActivityRoute
   '/settings/organization': typeof AppSettingsOrganizationRoute
   '/settings/users': typeof AppSettingsUsersRoute
   '/onboarding/chat': typeof AuthenticatedOnboardingChatRoute
@@ -430,6 +437,7 @@ export interface FileRoutesByTo {
   '/api/team-setup': typeof ApiTeamSetupRoute
   '/help/dataforseo-api-key': typeof AppHelpDataforseoApiKeyRoute
   '/help/openrouter-api-key': typeof AppHelpOpenrouterApiKeyRoute
+  '/settings/activity': typeof AppSettingsActivityRoute
   '/settings/organization': typeof AppSettingsOrganizationRoute
   '/settings/users': typeof AppSettingsUsersRoute
   '/onboarding/chat': typeof AuthenticatedOnboardingChatRoute
@@ -485,6 +493,7 @@ export interface FileRoutesById {
   '/_project/p/$projectId': typeof ProjectPProjectIdRouteRouteWithChildren
   '/_app/help/dataforseo-api-key': typeof AppHelpDataforseoApiKeyRoute
   '/_app/help/openrouter-api-key': typeof AppHelpOpenrouterApiKeyRoute
+  '/_app/settings/activity': typeof AppSettingsActivityRoute
   '/_app/settings/organization': typeof AppSettingsOrganizationRoute
   '/_app/settings/users': typeof AppSettingsUsersRoute
   '/_authenticated/onboarding/chat': typeof AuthenticatedOnboardingChatRoute
@@ -540,6 +549,7 @@ export interface FileRouteTypes {
     | '/p/$projectId'
     | '/help/dataforseo-api-key'
     | '/help/openrouter-api-key'
+    | '/settings/activity'
     | '/settings/organization'
     | '/settings/users'
     | '/onboarding/chat'
@@ -591,6 +601,7 @@ export interface FileRouteTypes {
     | '/api/team-setup'
     | '/help/dataforseo-api-key'
     | '/help/openrouter-api-key'
+    | '/settings/activity'
     | '/settings/organization'
     | '/settings/users'
     | '/onboarding/chat'
@@ -645,6 +656,7 @@ export interface FileRouteTypes {
     | '/_project/p/$projectId'
     | '/_app/help/dataforseo-api-key'
     | '/_app/help/openrouter-api-key'
+    | '/_app/settings/activity'
     | '/_app/settings/organization'
     | '/_app/settings/users'
     | '/_authenticated/onboarding/chat'
@@ -913,6 +925,13 @@ declare module '@tanstack/react-router' {
       preLoaderRoute: typeof AppSettingsOrganizationRouteImport
       parentRoute: typeof AppSettingsRoute
     }
+    '/_app/settings/activity': {
+      id: '/_app/settings/activity'
+      path: '/activity'
+      fullPath: '/settings/activity'
+      preLoaderRoute: typeof AppSettingsActivityRouteImport
+      parentRoute: typeof AppSettingsRoute
+    }
     '/_app/help/openrouter-api-key': {
       id: '/_app/help/openrouter-api-key'
       path: '/help/openrouter-api-key'
@@ -1085,12 +1104,14 @@ declare module '@tanstack/react-router' {
 }
 
 interface AppSettingsRouteChildren {
+  AppSettingsActivityRoute: typeof AppSettingsActivityRoute
   AppSettingsOrganizationRoute: typeof AppSettingsOrganizationRoute
   AppSettingsUsersRoute: typeof AppSettingsUsersRoute
   AppSettingsIndexRoute: typeof AppSettingsIndexRoute
 }
 
 const AppSettingsRouteChildren: AppSettingsRouteChildren = {
+  AppSettingsActivityRoute: AppSettingsActivityRoute,
   AppSettingsOrganizationRoute: AppSettingsOrganizationRoute,
   AppSettingsUsersRoute: AppSettingsUsersRoute,
   AppSettingsIndexRoute: AppSettingsIndexRoute,

src/routes/_app/settings.tsx

@@ -19,6 +19,9 @@ function SettingsLayout() {
     ...(isTeamClientAuthMode()
       ? [{ to: "/settings/users" as const, label: "Users" }]
       : []),
+    ...(isSessionClientAuthMode()
+      ? [{ to: "/settings/activity" as const, label: "Activity" }]
+      : []),
   ];
 
   return (

src/routes/_app/settings/activity.tsx

@@ -0,0 +1,13 @@
+import { createFileRoute, notFound } from "@tanstack/react-router";
+import { ActivityLogView } from "@/client/features/activity/ActivityLogView";
+import { isSessionClientAuthMode } from "@/lib/auth-mode";
+
+export const Route = createFileRoute("/_app/settings/activity")({
+  // Needs org membership + roles; the delegated modes have neither.
+  beforeLoad: () => {
+    if (!isSessionClientAuthMode()) {
+      throw notFound();
+    }
+  },
+  component: ActivityLogView,
+});

src/server/features/activity/ActivityRepository.test.ts

@@ -0,0 +1,153 @@
+import { createClient, type Client } from "@libsql/client";
+import { drizzle } from "drizzle-orm/libsql";
+import {
+  afterAll,
+  beforeAll,
+  beforeEach,
+  describe,
+  expect,
+  it,
+  vi,
+} from "vitest";
+import type * as ActivityRepositoryModule from "./ActivityRepository";
+
+// Real in-memory SQLite: list() is a filtered, ordered, keyset-paginated query
+// — the part a mocked builder chain can't verify.
+
+vi.mock("cloudflare:workers", () => ({ env: { DATABASE_PROVIDER: "d1" } }));
+
+let client: Client;
+let ActivityRepository: typeof ActivityRepositoryModule.ActivityRepository;
+
+const ctx = (over: Partial<{ userId: string; userEmail: string }> = {}) => ({
+  userId: over.userId ?? "u1",
+  userEmail: over.userEmail ?? "a@example.com",
+  organizationId: "org1",
+});
+
+beforeAll(async () => {
+  client = createClient({ url: "file::memory:" });
+  const testDb = drizzle(client);
+  vi.doMock("@/db", () => ({ db: testDb }));
+  vi.doMock("@/db/d1/client", () => ({ d1Db: testDb }));
+  vi.doMock("@/db/pg/client", () => ({ pgDb: null }));
+
+  await client.executeMultiple(`
+    CREATE TABLE activity_log (
+      id TEXT PRIMARY KEY,
+      organization_id TEXT NOT NULL,
+      actor_user_id TEXT NOT NULL,
+      actor_email TEXT NOT NULL,
+      action TEXT NOT NULL,
+      target_type TEXT,
+      target_id TEXT,
+      target_label TEXT,
+      metadata TEXT,
+      ip_address TEXT,
+      created_at INTEGER NOT NULL
+    );
+  `);
+
+  ({ ActivityRepository } = await import("./ActivityRepository"));
+});
+
+afterAll(() => {
+  client.close();
+});
+
+beforeEach(async () => {
+  await client.execute("DELETE FROM activity_log");
+});
+
+describe("ActivityRepository", () => {
+  it("records an entry with the actor and a serialized metadata blob", async () => {
+    await ActivityRepository.record({
+      context: ctx(),
+      action: "project.create",
+      targetType: "project",
+      targetId: "p1",
+      targetLabel: "Acme",
+      metadata: { domain: "acme.com" },
+    });
+
+    const [row] = await ActivityRepository.list({
+      organizationId: "org1",
+      limit: 10,
+    });
+    expect(row.actorEmail).toBe("a@example.com");
+    expect(row.action).toBe("project.create");
+    expect(row.targetLabel).toBe("Acme");
+    expect(JSON.parse(row.metadata ?? "{}")).toEqual({ domain: "acme.com" });
+  });
+
+  it("scopes to the organization and filters by actor and action", async () => {
+    await ActivityRepository.record({
+      context: ctx(),
+      action: "project.create",
+    });
+    await ActivityRepository.record({
+      context: ctx({ userId: "u2", userEmail: "b@example.com" }),
+      action: "audit.start",
+    });
+    await client.execute(
+      `INSERT INTO activity_log (id, organization_id, actor_user_id, actor_email, action, created_at) VALUES ('x', 'other-org', 'u1', 'a@example.com', 'project.create', 999)`,
+    );
+
+    expect(
+      await ActivityRepository.list({ organizationId: "org1", limit: 10 }),
+    ).toHaveLength(2);
+    expect(
+      await ActivityRepository.list({
+        organizationId: "org1",
+        actorUserId: "u2",
+        limit: 10,
+      }),
+    ).toHaveLength(1);
+    expect(
+      await ActivityRepository.list({
+        organizationId: "org1",
+        action: "audit.start",
+        limit: 10,
+      }),
+    ).toHaveLength(1);
+  });
+
+  it("returns newest first and pages with the before cursor", async () => {
+    for (let i = 0; i < 5; i++) {
+      await client.execute(
+        `INSERT INTO activity_log (id, organization_id, actor_user_id, actor_email, action, created_at) VALUES ('e${i}', 'org1', 'u1', 'a@example.com', 'project.create', ${1000 + i})`,
+      );
+    }
+
+    const firstPage = await ActivityRepository.list({
+      organizationId: "org1",
+      limit: 2,
+    });
+    expect(firstPage.map((r) => r.id)).toEqual(["e4", "e3"]);
+
+    const secondPage = await ActivityRepository.list({
+      organizationId: "org1",
+      limit: 2,
+      before: firstPage[firstPage.length - 1].createdAt,
+    });
+    expect(secondPage.map((r) => r.id)).toEqual(["e2", "e1"]);
+  });
+
+  it("lists distinct actors for the filter dropdown", async () => {
+    await ActivityRepository.record({
+      context: ctx(),
+      action: "project.create",
+    });
+    await ActivityRepository.record({ context: ctx(), action: "audit.start" });
+    await ActivityRepository.record({
+      context: ctx({ userId: "u2", userEmail: "b@example.com" }),
+      action: "project.create",
+    });
+
+    const actors = await ActivityRepository.listActors("org1");
+    expect(actors).toEqual([
+      { actorUserId: "u1", actorEmail: "a@example.com" },
+      { actorUserId: "u2", actorEmail: "b@example.com" },
+    ]);
+  });
+});

src/server/features/activity/ActivityRepository.ts

@@ -0,0 +1,100 @@
+import { randomUUID } from "node:crypto";
+import { and, desc, eq, lt } from "drizzle-orm";
+import { db } from "@/db";
+import { activityLog } from "@/db/schema";
+import type { EnsuredUserContext } from "@/middleware/ensure-user/types";
+
+// The set of things worth recording. Keep it small and stable — this is a
+// human-readable audit trail, not analytics.
+export const ACTIVITY_ACTIONS = [
+  "project.create",
+  "project.archive",
+  "project.restore",
+  "project.domain_set",
+  "audit.start",
+  "team.user_created",
+  "team.user_removed",
+  "team.password_reset",
+  "team.invitation_sent",
+] as const;
+
+export type ActivityAction = (typeof ACTIVITY_ACTIONS)[number];
+
+type ActorContext = Pick<
+  EnsuredUserContext,
+  "userId" | "userEmail" | "organizationId"
+>;
+
+type RecordInput = {
+  context: ActorContext;
+  action: ActivityAction;
+  targetType?: string;
+  targetId?: string;
+  // Human-readable snapshot (project name, teammate email) taken now, so the
+  // log stays meaningful after the target is deleted.
+  targetLabel?: string;
+  metadata?: Record<string, string | number | boolean | null>;
+};
+
+async function record(input: RecordInput): Promise<void> {
+  try {
+    await db.insert(activityLog).values({
+      id: randomUUID(),
+      organizationId: input.context.organizationId,
+      actorUserId: input.context.userId,
+      actorEmail: input.context.userEmail,
+      action: input.action,
+      targetType: input.targetType ?? null,
+      targetId: input.targetId ?? null,
+      targetLabel: input.targetLabel ?? null,
+      metadata: input.metadata ? JSON.stringify(input.metadata) : null,
+      ipAddress: null,
+      createdAt: new Date(),
+    });
+  } catch (error) {
+    // Logging must never break the action it records.
+    console.error("[activity] write failed", { action: input.action, error });
+  }
+}
+
+type ListInput = {
+  organizationId: string;
+  actorUserId?: string;
+  action?: string;
+  before?: Date;
+  limit: number;
+};
+
+async function list(input: ListInput) {
+  const conditions = [eq(activityLog.organizationId, input.organizationId)];
+  if (input.actorUserId) {
+    conditions.push(eq(activityLog.actorUserId, input.actorUserId));
+  }
+  if (input.action) {
+    conditions.push(eq(activityLog.action, input.action));
+  }
+  if (input.before) {
+    conditions.push(lt(activityLog.createdAt, input.before));
+  }
+
+  return db
+    .select()
+    .from(activityLog)
+    .where(and(...conditions))
+    .orderBy(desc(activityLog.createdAt))
+    .limit(input.limit);
+}
+
+// Distinct actors seen in this org's log, for the filter dropdown.
+async function listActors(organizationId: string) {
+  return db
+    .selectDistinct({
+      actorUserId: activityLog.actorUserId,
+      actorEmail: activityLog.actorEmail,
+    })
+    .from(activityLog)
+    .where(eq(activityLog.organizationId, organizationId))
+    .orderBy(activityLog.actorEmail);
+}
+
+export const ActivityRepository = { record, list, listActors } as const;

src/serverFunctions/activity.ts

@@ -0,0 +1,60 @@
+import { createServerFn } from "@tanstack/react-start";
+import { z } from "zod";
+import { requireOrgPermission } from "@/server/auth/org-gate";
+import { ActivityRepository } from "@/server/features/activity/ActivityRepository";
+import { requireAuthenticatedContext } from "@/serverFunctions/middleware";
+
+const listSchema = z.object({
+  actorUserId: z.string().optional(),
+  action: z.string().optional(),
+  before: z.string().optional(),
+  limit: z.number().int().min(1).max(100).optional(),
+});
+
+function toIso(value: Date | number): string {
+  return value instanceof Date
+    ? value.toISOString()
+    : new Date(value).toISOString();
+}
+
+export const getActivityLog = createServerFn({ method: "POST" })
+  .middleware(requireAuthenticatedContext)
+  .validator(listSchema)
+  .handler(async ({ data, context }) => {
+    // Owner/admin only — same gate as team-user management.
+    requireOrgPermission(context, { member: ["create"] });
+
+    const limit = data.limit ?? 50;
+    const rows = await ActivityRepository.list({
+      organizationId: context.organizationId,
+      actorUserId: data.actorUserId,
+      action: data.action,
+      before: data.before ? new Date(data.before) : undefined,
+      limit: limit + 1,
+    });
+
+    const hasMore = rows.length > limit;
+    const items = (hasMore ? rows.slice(0, limit) : rows).map((row) => ({
+      id: row.id,
+      actorUserId: row.actorUserId,
+      actorEmail: row.actorEmail,
+      action: row.action,
+      targetType: row.targetType,
+      targetId: row.targetId,
+      targetLabel: row.targetLabel,
+      metadata: row.metadata,
+      createdAt: toIso(row.createdAt),
+    }));
+
+    return {
+      items,
+      nextCursor: hasMore ? (items[items.length - 1]?.createdAt ?? null) : null,
+    };
+  });
+
+export const getActivityActors = createServerFn({ method: "POST" })
+  .middleware(requireAuthenticatedContext)
+  .handler(async ({ context }) => {
+    requireOrgPermission(context, { member: ["create"] });
+    return ActivityRepository.listActors(context.organizationId);
+  });

src/serverFunctions/audit.ts

@@ -1,6 +1,7 @@
 import { createServerFn } from "@tanstack/react-start";
 import { waitUntil } from "cloudflare:workers";
 import { requireOrgPermission } from "@/server/auth/org-gate";
+import { ActivityRepository } from "@/server/features/activity/ActivityRepository";
 import { AuditService } from "@/server/features/audit/services/AuditService";
 import { captureServerEvent } from "@/server/lib/posthog";
 import { requireProjectContext } from "@/serverFunctions/middleware";
@@ -29,6 +30,15 @@ export const startAudit = createServerFn({ method: "POST" })
       limitTier,
     });
 
+    await ActivityRepository.record({
+      context,
+      action: "audit.start",
+      targetType: "project",
+      targetId: context.projectId,
+      targetLabel: data.startUrl,
+      metadata: { maxPages: data.maxPages ?? 50 },
+    });
+
     waitUntil(
       captureServerEvent({
         distinctId: context.userId,

src/serverFunctions/organization.ts

@@ -5,6 +5,7 @@ import { getAuth, getHostedBaseUrl } from "@/lib/auth";
 import { hasOrgPermission } from "@/lib/org-permissions";
 import { consumeInvitationSendBudget } from "@/server/auth/invitation-send-limit";
 import { requireOrgPermission } from "@/server/auth/org-gate";
+import { ActivityRepository } from "@/server/features/activity/ActivityRepository";
 import { AuthRepository } from "@/server/auth/repositories/AuthRepository";
 import { sendHostedInvitationEmail } from "@/server/email/loops";
 import { AppError } from "@/server/lib/errors";
@@ -128,6 +129,14 @@ export const sendTeamInvitation = createServerFn({ method: "POST" })
       },
     });
 
+    await ActivityRepository.record({
+      context,
+      action: "team.invitation_sent",
+      targetType: "invitation",
+      targetId: invitation.id,
+      targetLabel: data.email,
+    });
+
     const [inviter, memberships] = await Promise.all([
       AuthRepository.getHostedUser(context.userId),
       AuthRepository.listMembershipsForUser(context.userId),

src/serverFunctions/projects.ts

@@ -1,5 +1,6 @@
 import { createServerFn } from "@tanstack/react-start";
 import { requireOrgPermission } from "@/server/auth/org-gate";
+import { ActivityRepository } from "@/server/features/activity/ActivityRepository";
 import { ProjectService } from "@/server/features/projects/services/ProjectService";
 import {
   requireAuthenticatedContext,
@@ -28,7 +29,18 @@ export const createProject = createServerFn({ method: "POST" })
   .validator(createProjectSchema)
   .handler(async ({ data, context }) => {
     requireOrgPermission(context, { project: ["create"] });
-    return ProjectService.createProject(context.organizationId, data);
+    const project = await ProjectService.createProject(
+      context.organizationId,
+      data,
+    );
+    await ActivityRepository.record({
+      context,
+      action: "project.create",
+      targetType: "project",
+      targetId: project.id,
+      targetLabel: project.name,
+    });
+    return project;
   });
 
 export const updateProject = createServerFn({ method: "POST" })
@@ -41,9 +53,20 @@ export const updateProject = createServerFn({ method: "POST" })
 export const setProjectDomain = createServerFn({ method: "POST" })
   .middleware(requireProjectContext)
   .validator(setProjectDomainSchema)
-  .handler(async ({ data, context }) =>
-    ProjectService.setProjectDomain(context.organizationId, data),
-  );
+  .handler(async ({ data, context }) => {
+    const result = await ProjectService.setProjectDomain(
+      context.organizationId,
+      data,
+    );
+    await ActivityRepository.record({
+      context,
+      action: "project.domain_set",
+      targetType: "project",
+      targetId: data.projectId,
+      targetLabel: data.domain,
+    });
+    return result;
+  });
 
 export const setProjectMarket = createServerFn({ method: "POST" })
   .middleware(requireProjectContext)
@@ -57,7 +80,17 @@ export const archiveProject = createServerFn({ method: "POST" })
   .validator(archiveProjectSchema)
   .handler(async ({ data, context }) => {
     requireOrgPermission(context, { project: ["delete"] });
-    return ProjectService.archiveProject(context.organizationId, data);
+    const result = await ProjectService.archiveProject(
+      context.organizationId,
+      data,
+    );
+    await ActivityRepository.record({
+      context,
+      action: "project.archive",
+      targetType: "project",
+      targetId: data.projectId,
+    });
+    return result;
   });
 
 export const getArchivedProjects = createServerFn({ method: "POST" })
@@ -71,7 +104,17 @@ export const restoreProject = createServerFn({ method: "POST" })
   .validator(restoreProjectSchema)
   .handler(async ({ data, context }) => {
     requireOrgPermission(context, { project: ["delete"] });
-    return ProjectService.restoreProject(context.organizationId, data);
+    const result = await ProjectService.restoreProject(
+      context.organizationId,
+      data,
+    );
+    await ActivityRepository.record({
+      context,
+      action: "project.restore",
+      targetType: "project",
+      targetId: data.archivedProjectId,
+    });
+    return result;
   });
 
 export const getProjectAccess = createServerFn({ method: "POST" })

src/serverFunctions/teamUsers.ts

@@ -6,6 +6,7 @@ import {
   HOSTED_PASSWORD_MAX_LENGTH,
   HOSTED_PASSWORD_MIN_LENGTH,
 } from "@/lib/auth-options";
+import { ActivityRepository } from "@/server/features/activity/ActivityRepository";
 import { AuthRepository } from "@/server/auth/repositories/AuthRepository";
 import { requireOrgPermission } from "@/server/auth/org-gate";
 import { AppError } from "@/server/lib/errors";
@@ -89,6 +90,14 @@ export const createTeamUser = createServerFn({ method: "POST" })
         role: data.role,
         organizationId: context.organizationId,
       });
+      await ActivityRepository.record({
+        context,
+        action: "team.user_created",
+        targetType: "user",
+        targetId: created.userId,
+        targetLabel: created.email,
+        metadata: { role: data.role },
+      });
       return { userId: created.userId, email: created.email };
     } catch (error) {
       throw new AppError(
@@ -117,6 +126,12 @@ export const resetTeamUserPassword = createServerFn({ method: "POST" })
 
     await setCredentialPassword(data.userId, data.password);
     await revokeUserSessions(data.userId);
+    await ActivityRepository.record({
+      context,
+      action: "team.password_reset",
+      targetType: "user",
+      targetId: data.userId,
+    });
     return { ok: true };
   });
 
@@ -147,5 +162,11 @@ export const removeTeamUser = createServerFn({ method: "POST" })
     // can re-add them later with a fresh password.
     await AuthRepository.removeMembership(data.userId, context.organizationId);
     await revokeUserSessions(data.userId);
+    await ActivityRepository.record({
+      context,
+      action: "team.user_removed",
+      targetType: "user",
+      targetId: data.userId,
+    });
     return { ok: true };
   });