admin: uploads list view with search, sort, and delete

Add /admin/uploads HTML page and JSON API backed by the upload_files

DB index. The page lists file_id, name, size (KB), uploaded_at, and

sha256 with client-side search by name, column sort, and per-row delete.

DELETE /admin/uploads/:id removes the DB index row and the on-disk

data file plus .meta.json sidecar. Admin deletes are written to the

audit log.

Wire the new dependencies through admin.Mount and main.go, and run

the backfill step on startup so pre-existing sidecars are indexed.

Tests cover auth, HTML rendering, JSON search, delete removing all

artifacts, and audit entry creation.

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

internal/admin/router.go

@@ -7,6 +7,8 @@ import (
 	"errors"
 	"log/slog"
 	"net/http"
+	"os"
+	"path/filepath"
 	"strconv"
 
 	"github.com/gin-gonic/gin"
@@ -15,11 +17,12 @@ import (
 	"spark-mcp-go/internal/cluster"
 	"spark-mcp-go/internal/middleware"
 	"spark-mcp-go/internal/storage"
+	"spark-mcp-go/internal/uploads"
 )
 
 // Mount attaches the /admin sub-router to r, protecting every route with
 // bearer-token admin authentication.
-func Mount(r *gin.Engine, repo *storage.ClusterRepo, auditRepo *audit.Repo, adminTokens []string) {
+func Mount(r *gin.Engine, repo *storage.ClusterRepo, uploadRepo *storage.UploadRepo, auditRepo *audit.Repo, uploadStore *uploads.Store, adminTokens []string) {
 	// HTML page is public — its own modal prompts for the token.
 	// All other /admin/* endpoints (API + OpenAPI docs) still require auth.
 	gPublic := r.Group("/admin")
@@ -33,6 +36,9 @@ func Mount(r *gin.Engine, repo *storage.ClusterRepo, auditRepo *audit.Repo, admi
 	g.PUT("/clusters/:id", updateCluster(repo, auditRepo))
 	g.DELETE("/clusters/:id", deleteCluster(repo, auditRepo))
 	g.GET("/audit", listAudit(auditRepo))
+	g.GET("/uploads", uploadsWebHandler)
+	g.GET("/uploads/api", listUploads(uploadRepo))
+	g.DELETE("/uploads/:id", deleteUpload(uploadRepo, auditRepo, uploadStore))
 	g.GET("/docs", DocsHandler)
 	g.GET("/docs/spec", OpenAPISpecHandler)
 }
@@ -275,6 +281,66 @@ func deleteCluster(repo *storage.ClusterRepo, auditRepo *audit.Repo) gin.Handler
 	}
 }
 
+func listUploads(repo *storage.UploadRepo) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		search := c.Query("search")
+		limitStr := c.DefaultQuery("limit", "100")
+		limit, err := strconv.Atoi(limitStr)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "invalid limit"})
+			return
+		}
+
+		uploads, err := repo.List(c.Request.Context(), search, limit)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		c.JSON(http.StatusOK, uploads)
+	}
+}
+
+func deleteUpload(repo *storage.UploadRepo, auditRepo *audit.Repo, store *uploads.Store) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		id := c.Param("id")
+		ctx := c.Request.Context()
+
+		meta, err := repo.Get(ctx, id)
+		if err != nil && !errors.Is(err, storage.ErrNotFound) {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+
+		if err := repo.Delete(ctx, id); err != nil && !errors.Is(err, storage.ErrNotFound) {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+
+		// Always attempt to remove the on-disk files; the DB is only an index.
+		if store != nil {
+			dataPath := filepath.Join(store.Root, id)
+			_ = os.Remove(dataPath)
+			_ = os.Remove(dataPath + ".meta.json")
+		}
+
+		if meta.FileID != "" {
+			details, _ := audit.MarshalDetails(map[string]any{
+				"file_id": id,
+				"name":    meta.Name,
+				"size":    meta.Size,
+				"sha256":  meta.SHA256,
+			})
+			_ = auditRepo.Insert(ctx, &audit.Entry{
+				Actor:     actor(c),
+				Action:    audit.ActionUploadDelete,
+				ClusterID: id,
+				Details:   details,
+			})
+		}
+
+		c.Status(http.StatusNoContent)
+	}
+}
 func listAudit(auditRepo *audit.Repo) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		limitStr := c.DefaultQuery("limit", "100")

internal/admin/router_test.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"net/http"
 	"net/http/httptest"
+	"path/filepath"
 	"strings"
 	"testing"
 
@@ -15,6 +16,7 @@ import (
 	"spark-mcp-go/internal/audit"
 	"spark-mcp-go/internal/cluster"
 	"spark-mcp-go/internal/storage"
+	"spark-mcp-go/internal/uploads"
 )
 
 func init() {
@@ -29,7 +31,11 @@ func newTestAdmin(t *testing.T) (*gin.Engine, *storage.ClusterRepo, *audit.Repo)
 	}
 	t.Cleanup(func() { _ = db.Close() })
 	r := gin.New()
-	Mount(r, db.Clusters(), audit.NewRepo(db), []string{"good-token"})
+	uploadStore, err := uploads.New(filepath.Join(t.TempDir(), "uploads"))
+	if err != nil {
+		t.Fatalf("new upload store: %v", err)
+	}
+	Mount(r, db.Clusters(), db.Uploads(), audit.NewRepo(db), &uploadStore, []string{"good-token"})
 	return r, db.Clusters(), audit.NewRepo(db)
 }
 

internal/admin/uploads_test.go

@@ -0,0 +1,154 @@
+package admin
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+
+	"spark-mcp-go/internal/audit"
+	"spark-mcp-go/internal/storage"
+	"spark-mcp-go/internal/uploads"
+)
+
+func newTestAdminUploads(t *testing.T) (*gin.Engine, *storage.UploadRepo, *audit.Repo, *uploads.Store) {
+	t.Helper()
+	db, err := storage.Open(":memory:")
+	if err != nil {
+		t.Fatalf("open: %v", err)
+	}
+	t.Cleanup(func() { _ = db.Close() })
+
+	uploadStore, err := uploads.New(filepath.Join(t.TempDir(), "uploads"))
+	if err != nil {
+		t.Fatalf("new upload store: %v", err)
+	}
+
+	r := gin.New()
+	Mount(r, db.Clusters(), db.Uploads(), audit.NewRepo(db), &uploadStore, []string{"good-token"})
+	return r, db.Uploads(), audit.NewRepo(db), &uploadStore
+}
+
+func TestUploadsWeb_RequiresAuth(t *testing.T) {
+	r, _, _, _ := newTestAdminUploads(t)
+
+	w := doReq(t, r, "GET", "/admin/uploads", "", nil)
+	if w.Code != http.StatusUnauthorized {
+		t.Errorf("GET /admin/uploads without auth: got %d, want %d", w.Code, http.StatusUnauthorized)
+	}
+
+	w = doReq(t, r, "GET", "/admin/uploads", "good-token", nil)
+	if w.Code != http.StatusOK {
+		t.Errorf("GET /admin/uploads with auth: got %d, want %d", w.Code, http.StatusOK)
+	}
+	ct := w.Header().Get("Content-Type")
+	if !strings.Contains(ct, "text/html") {
+		t.Errorf("Content-Type = %q, want text/html", ct)
+	}
+	body := w.Body.String()
+	if !strings.Contains(body, "href='/admin/uploads'") && !strings.Contains(body, "href=\"/admin/uploads\"") {
+		t.Errorf("body missing uploads nav link")
+	}
+	if !strings.Contains(body, "uploads-body") {
+		t.Errorf("body missing uploads table")
+	}
+}
+
+func TestListUploads(t *testing.T) {
+	r, repo, _, _ := newTestAdminUploads(t)
+	ctx := context.Background()
+
+	uploadedAt := time.Unix(0, time.Now().UnixNano())
+	if err := repo.Create(ctx, "00000000000000000000000000000001", "alpha.txt", 10, "deadbeef", uploadedAt); err != nil {
+		t.Fatalf("create upload: %v", err)
+	}
+	if err := repo.Create(ctx, "00000000000000000000000000000002", "beta.txt", 20, "cafebabe", uploadedAt.Add(time.Second)); err != nil {
+		t.Fatalf("create upload: %v", err)
+	}
+
+	w := doReq(t, r, "GET", "/admin/uploads/api", "good-token", nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("got status %d, want %d", w.Code, http.StatusOK)
+	}
+	var list []map[string]any
+	if err := json.Unmarshal(w.Body.Bytes(), &list); err != nil {
+		t.Fatalf("unmarshal list: %v", err)
+	}
+	if len(list) != 2 {
+		t.Errorf("got %d uploads, want 2", len(list))
+	}
+
+	w = doReq(t, r, "GET", "/admin/uploads/api?search=alpha", "good-token", nil)
+	if w.Code != http.StatusOK {
+		t.Fatalf("search: got status %d", w.Code)
+	}
+	if err := json.Unmarshal(w.Body.Bytes(), &list); err != nil {
+		t.Fatalf("unmarshal search: %v", err)
+	}
+	if len(list) != 1 {
+		t.Errorf("search result: got %d, want 1", len(list))
+	}
+}
+
+func TestDeleteUpload(t *testing.T) {
+	r, repo, auditRepo, store := newTestAdminUploads(t)
+	ctx := context.Background()
+
+	id := "00000000000000000000000000000003"
+	dataPath := filepath.Join(store.Root, id)
+	metaPath := dataPath + ".meta.json"
+
+	if err := os.WriteFile(dataPath, []byte("payload"), 0o640); err != nil {
+		t.Fatalf("create data file: %v", err)
+	}
+	sc := map[string]any{
+		"name":        "delete-me.txt",
+		"size":        7,
+		"sha256":      "feedface",
+		"uploaded_at": time.Now().Format(time.RFC3339Nano),
+	}
+	b, _ := json.Marshal(sc)
+	if err := os.WriteFile(metaPath, b, 0o600); err != nil {
+		t.Fatalf("create sidecar: %v", err)
+	}
+	if err := repo.Create(ctx, id, "delete-me.txt", 7, "feedface", time.Now()); err != nil {
+		t.Fatalf("create db row: %v", err)
+	}
+
+	w := doReq(t, r, "DELETE", "/admin/uploads/"+id, "good-token", nil)
+	if w.Code != http.StatusNoContent {
+		t.Fatalf("delete: got status %d, want %d: %s", w.Code, http.StatusNoContent, w.Body.String())
+	}
+
+	if _, err := repo.Get(ctx, id); !errors.Is(err, storage.ErrNotFound) {
+		t.Errorf("db row still exists: %v", err)
+	}
+	if _, err := os.Stat(dataPath); !os.IsNotExist(err) {
+		t.Errorf("data file still exists")
+	}
+	if _, err := os.Stat(metaPath); !os.IsNotExist(err) {
+		t.Errorf("sidecar still exists")
+	}
+
+	entries, err := auditRepo.List(ctx, 100)
+	if err != nil {
+		t.Fatalf("list audit: %v", err)
+	}
+	found := false
+	for _, e := range entries {
+		if e.Action == audit.ActionUploadDelete && e.ClusterID == id {
+			found = true
+			break
+		}
+	}
+	if !found {
+		t.Errorf("missing upload.delete audit entry")
+	}
+}

internal/admin/web.go

@@ -7,7 +7,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-//go:embed web/cluster.html
+//go:embed web
 var webFS embed.FS
 
 func webHandler(c *gin.Context) {
@@ -18,3 +18,12 @@ func webHandler(c *gin.Context) {
 	}
 	c.Data(http.StatusOK, "text/html; charset=utf-8", data)
 }
+
+func uploadsWebHandler(c *gin.Context) {
+	data, err := webFS.ReadFile("web/uploads.html")
+	if err != nil {
+		c.String(http.StatusInternalServerError, "uploads.html: %v", err)
+		return
+	}
+	c.Data(http.StatusOK, "text/html; charset=utf-8", data)
+}

internal/admin/web/cluster.html

@@ -34,6 +34,10 @@
       flex-wrap: wrap;
     }
     header h1 { margin: 0; font-size: 1.1rem; color: var(--accent); }
+    nav { display: flex; gap: .75rem; }
+    nav a { color: var(--muted); text-decoration: none; }
+    nav a:hover { color: var(--text); }
+    nav a.active { color: var(--accent); }
     .auth { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
     input[type='text'], input[type='password'], input[type='number'], select, textarea {
       background: var(--bg);
@@ -111,7 +115,13 @@
 </head>
 <body>
   <header>
+    <div style='display:flex;align-items:center;gap:1rem;'>
       <h1>spark-mcp-go Admin</h1>
+      <nav>
+        <a href='/admin' class='active'>Clusters</a>
+        <a href='/admin/uploads'>Uploads</a>
+      </nav>
+    </div>
     <div class='auth'>
       <button id='set-token' class='secondary'>Set Token</button>
       <button id='logout' class='danger'>Logout</button>

internal/admin/web/uploads.html

@@ -0,0 +1,377 @@
+<!DOCTYPE html>
+<html lang='en'>
+<head>
+  <meta charset='utf-8'>
+  <meta name='viewport' content='width=device-width, initial-scale=1'>
+  <title>Uploads - spark-mcp-go Admin</title>
+  <style>
+    :root {
+      --bg: #0d1117;
+      --panel: #161b22;
+      --border: #30363d;
+      --text: #c9d1d9;
+      --muted: #8b949e;
+      --accent: #58a6ff;
+      --danger: #f85149;
+      --ok: #3fb950;
+    }
+    * { box-sizing: border-box; }
+    body {
+      margin: 0;
+      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
+      background: var(--bg);
+      color: var(--text);
+      line-height: 1.5;
+    }
+    header {
+      display: flex;
+      align-items: center;
+      justify-content: space-between;
+      gap: 1rem;
+      padding: 1rem;
+      border-bottom: 1px solid var(--border);
+      background: var(--panel);
+      flex-wrap: wrap;
+    }
+    header h1 { margin: 0; font-size: 1.1rem; color: var(--accent); }
+    nav { display: flex; gap: .75rem; }
+    nav a { color: var(--muted); text-decoration: none; }
+    nav a:hover { color: var(--text); }
+    nav a.active { color: var(--accent); }
+    .auth { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
+    input[type='text'], input[type='password'] {
+      background: var(--bg);
+      color: var(--text);
+      border: 1px solid var(--border);
+      border-radius: 4px;
+      padding: .4rem .5rem;
+      font: inherit;
+    }
+    input[type='text'] { min-width: 220px; }
+    button {
+      background: var(--accent);
+      color: #fff;
+      border: none;
+      border-radius: 4px;
+      padding: .4rem .8rem;
+      font: inherit;
+      cursor: pointer;
+    }
+    button:hover { opacity: .9; }
+    button.danger { background: var(--danger); }
+    button.secondary { background: var(--border); color: var(--text); }
+    main { padding: 1rem; max-width: 1200px; margin: 0 auto; }
+    .toolbar { display: flex; gap: .5rem; margin-bottom: 1rem; align-items: center; flex-wrap: wrap; }
+    .toolbar span { color: var(--muted); }
+    .error {
+      background: rgba(248, 81, 73, .15);
+      border: 1px solid var(--danger);
+      color: var(--danger);
+      padding: .75rem;
+      border-radius: 4px;
+      margin-bottom: 1rem;
+      white-space: pre-wrap;
+    }
+    .hidden { display: none; }
+    table { width: 100%; border-collapse: collapse; }
+    th, td { text-align: left; padding: .5rem; border-bottom: 1px solid var(--border); }
+    th { color: var(--muted); font-weight: 600; user-select: none; }
+    th.sortable { cursor: pointer; }
+    th.sortable:hover { color: var(--text); }
+    td { vertical-align: middle; font-size: .9rem; }
+    td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
+    .actions { display: flex; gap: .4rem; }
+    dialog.modal {
+      border: 1px solid var(--border);
+      background: var(--panel);
+      color: var(--text);
+      border-radius: 6px;
+      padding: 1.5rem;
+      min-width: 360px;
+      max-width: 90vw;
+    }
+    dialog.modal::backdrop { background: rgba(0, 0, 0, .65); }
+    dialog.modal h2 { margin: 0 0 .5rem; font-size: 1.1rem; color: var(--accent); }
+    dialog.modal form { display: flex; flex-direction: column; gap: .75rem; }
+    dialog.modal label { color: var(--muted); font-size: .9rem; }
+    dialog.modal input { width: 100%; }
+    .modal-error { color: var(--danger); font-size: .9rem; margin: 0; }
+    .modal-actions { display: flex; gap: .5rem; justify-content: flex-end; }
+  </style>
+</head>
+<body>
+  <header>
+    <div style='display:flex;align-items:center;gap:1rem;'>
+      <h1>spark-mcp-go Admin</h1>
+      <nav>
+        <a href='/admin'>Clusters</a>
+        <a href='/admin/uploads' class='active'>Uploads</a>
+      </nav>
+    </div>
+    <div class='auth'>
+      <button id='set-token' class='secondary'>Set Token</button>
+      <button id='logout' class='danger'>Logout</button>
+    </div>
+  </header>
+
+  <main>
+    <div id='error' class='error hidden'></div>
+
+    <section class='toolbar'>
+      <input id='search' type='text' placeholder='Search by name...'>
+      <button id='refresh' class='secondary'>Refresh</button>
+      <span id='count'></span>
+    </section>
+
+    <section>
+      <table>
+        <thead>
+          <tr>
+            <th class='sortable' data-key='file_id'>File ID</th>
+            <th class='sortable' data-key='name'>Name</th>
+            <th class='sortable' data-key='size'>Size (KB)</th>
+            <th class='sortable' data-key='uploaded_at'>Uploaded At</th>
+            <th>SHA256</th>
+            <th>Actions</th>
+          </tr>
+        </thead>
+        <tbody id='uploads-body'>
+          <tr><td colspan='6'>Loading...</td></tr>
+        </tbody>
+      </table>
+    </section>
+  </main>
+
+  <dialog id='token-modal' class='modal'>
+    <h2>Admin Token Required</h2>
+    <p id='modal-error' class='modal-error hidden'></p>
+    <form id='token-form'>
+      <label for='modal-token'>Bearer token</label>
+      <input id='modal-token' type='password' autocomplete='off' required>
+      <div class='modal-actions'>
+        <button type='submit' id='modal-save'>Save</button>
+        <button type='button' id='modal-cancel' class='secondary hidden'>Cancel</button>
+      </div>
+    </form>
+  </dialog>
+
+  <script>
+    const $ = (sel) => document.querySelector(sel);
+    const API = '/admin/uploads';
+
+    let uploads = [];
+    let sortKey = 'uploaded_at';
+    let sortDir = -1;
+    let pendingRetry = null;
+    let cancelBlocker = null;
+
+    function headers() {
+      return {
+        'Authorization': 'Bearer ' + (localStorage.getItem('adminToken') || ''),
+        'Content-Type': 'application/json'
+      };
+    }
+
+    function showError(msg) {
+      const el = $('#error');
+      el.textContent = msg || '';
+      el.classList.toggle('hidden', !msg);
+    }
+
+    function showModalError(msg) {
+      const el = $('#modal-error');
+      el.textContent = msg || '';
+      el.classList.toggle('hidden', !msg);
+    }
+
+    function openTokenModal(opts = {}) {
+      const dialog = $('#token-modal');
+      const cancelBtn = $('#modal-cancel');
+      showModalError(opts.error || '');
+      cancelBtn.classList.toggle('hidden', !opts.allowCancel);
+      if (cancelBlocker) {
+        dialog.removeEventListener('cancel', cancelBlocker);
+        cancelBlocker = null;
+      }
+      if (!opts.allowCancel) {
+        cancelBlocker = (e) => e.preventDefault();
+        dialog.addEventListener('cancel', cancelBlocker);
+      }
+      dialog.showModal();
+      $('#modal-token').focus();
+    }
+
+    function closeTokenModal() {
+      const dialog = $('#token-modal');
+      showModalError('');
+      if (cancelBlocker) {
+        dialog.removeEventListener('cancel', cancelBlocker);
+        cancelBlocker = null;
+      }
+      dialog.close();
+      $('#modal-token').value = '';
+    }
+
+    function saveTokenFromModal(e) {
+      e.preventDefault();
+      localStorage.setItem('adminToken', $('#modal-token').value.trim());
+      closeTokenModal();
+      if (pendingRetry) {
+        const fn = pendingRetry;
+        pendingRetry = null;
+        fn();
+      } else {
+        loadUploads();
+      }
+    }
+
+    async function api(method, path, body) {
+      const opts = { method, headers: headers() };
+      if (body !== undefined) opts.body = JSON.stringify(body);
+      const res = await fetch(API + path, opts);
+      if (!res.ok) {
+        if (res.status === 401) {
+          localStorage.removeItem('adminToken');
+          pendingRetry = () => api(method, path, body);
+          openTokenModal({
+            error: 'Token rejected by server (401). Enter a valid token.',
+            allowCancel: false
+          });
+          throw new Error('401 Unauthorized');
+        }
+        let detail = res.statusText;
+        try {
+          const j = await res.json();
+          if (j.error) detail = j.error;
+        } catch (_) {}
+        throw new Error(`${res.status} ${detail}`);
+      }
+      if (res.status === 204) return null;
+      return res.json();
+    }
+
+    function formatKB(bytes) {
+      return (bytes / 1024).toFixed(2);
+    }
+
+    function formatTime(ts) {
+      if (!ts) return '';
+      const d = new Date(ts);
+      return isNaN(d) ? ts : d.toISOString();
+    }
+
+    function truncate(s, n) {
+      if (!s || s.length <= n) return s || '';
+      return s.slice(0, n) + '…';
+    }
+
+    function escapeHtml(s) {
+      return String(s)
+        .replace(/&/g, '&amp;')
+        .replace(/</g, '&lt;')
+        .replace(/>/g, '&gt;')
+        .replace(/"/g, '&quot;')
+        .replace(/'/g, '&#39;');
+    }
+
+    function filteredUploads() {
+      const q = $('#search').value.trim().toLowerCase();
+      if (!q) return uploads.slice();
+      return uploads.filter(u => (u.name || '').toLowerCase().includes(q));
+    }
+
+    function compare(a, b) {
+      let av = a[sortKey];
+      let bv = b[sortKey];
+      if (sortKey === 'size') { av = Number(av); bv = Number(bv); }
+      else if (sortKey === 'uploaded_at') { av = new Date(av).getTime(); bv = new Date(bv).getTime(); }
+      else { av = String(av).toLowerCase(); bv = String(bv).toLowerCase(); }
+      if (av < bv) return -sortDir;
+      if (av > bv) return sortDir;
+      return 0;
+    }
+
+    function renderList() {
+      const tbody = $('#uploads-body');
+      const list = filteredUploads().sort(compare);
+      $('#count').textContent = list.length + ' file' + (list.length === 1 ? '' : 's');
+      tbody.innerHTML = '';
+      if (!list.length) {
+        tbody.innerHTML = '<tr><td colspan="6">No uploads.</td></tr>';
+        return;
+      }
+      for (const u of list) {
+        const tr = document.createElement('tr');
+        tr.innerHTML = `
+          <td class='mono' title='${escapeHtml(u.file_id)}'>${escapeHtml(truncate(u.file_id, 8))}</td>
+          <td>${escapeHtml(u.name)}</td>
+          <td>${escapeHtml(formatKB(u.size))}</td>
+          <td>${escapeHtml(formatTime(u.uploaded_at))}</td>
+          <td class='mono' title='${escapeHtml(u.sha256)}'>${escapeHtml(truncate(u.sha256, 8))}</td>
+          <td class='actions'>
+            <button data-id='${escapeHtml(u.file_id)}' class='danger delete'>Delete</button>
+          </td>
+        `;
+        tbody.appendChild(tr);
+      }
+      tbody.querySelectorAll('.delete').forEach(b => b.addEventListener('click', handleDelete));
+    }
+
+    async function loadUploads() {
+      showError('');
+      try {
+        uploads = await api('GET', '/api');
+        renderList();
+      } catch (e) {
+        showError('Failed to load uploads: ' + e.message);
+      }
+    }
+
+    async function handleDelete(e) {
+      const id = e.target.dataset.id;
+      if (!confirm(`Delete upload ${id}?`)) return;
+      showError('');
+      try {
+        await api('DELETE', `/${encodeURIComponent(id)}`);
+        await loadUploads();
+      } catch (err) {
+        showError('Failed to delete upload: ' + err.message);
+      }
+    }
+
+    function handleSort(e) {
+      const key = e.target.dataset.key;
+      if (!key) return;
+      if (sortKey === key) {
+        sortDir = -sortDir;
+      } else {
+        sortKey = key;
+        sortDir = key === 'uploaded_at' ? -1 : 1;
+      }
+      document.querySelectorAll('th.sortable').forEach(th => {
+        th.textContent = th.textContent.replace(/ [▲▼]$/, '');
+      });
+      const marker = sortDir > 0 ? ' ▲' : ' ▼';
+      e.target.textContent = e.target.textContent.replace(/ [▲▼]$/, '') + marker;
+      renderList();
+    }
+
+    $('#search').addEventListener('input', renderList);
+    $('#refresh').addEventListener('click', loadUploads);
+    $('#set-token').addEventListener('click', () => openTokenModal({ allowCancel: true }));
+    $('#logout').addEventListener('click', () => {
+      localStorage.removeItem('adminToken');
+      openTokenModal({ error: 'Token cleared. Enter a new token to continue.', allowCancel: false });
+    });
+    $('#token-form').addEventListener('submit', saveTokenFromModal);
+    $('#modal-cancel').addEventListener('click', closeTokenModal);
+    document.querySelectorAll('th.sortable').forEach(th => th.addEventListener('click', handleSort));
+
+    if (!localStorage.getItem('adminToken')) {
+      openTokenModal({ allowCancel: false });
+    } else {
+      loadUploads();
+    }
+  </script>
+</body>
+</html>

internal/audit/repo.go

@@ -18,6 +18,8 @@ const (
 	ActionClusterCreate Action = "cluster.create"
 	ActionClusterUpdate Action = "cluster.update"
 	ActionClusterDelete Action = "cluster.delete"
+	ActionUploadCreate  Action = "upload.create"
+	ActionUploadDelete  Action = "upload.delete"
 )
 
 // Entry is one admin write operation recorded for accountability.

internal/mcp/tools/deps.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"spark-mcp-go/internal/analyzer"
+	"spark-mcp-go/internal/audit"
 	"spark-mcp-go/internal/httpclient"
 	"spark-mcp-go/internal/storage"
 	"spark-mcp-go/internal/uploads"
@@ -13,6 +14,7 @@ import (
 // Deps bundles the dependencies shared by all MCP Tool handlers.
 type Deps struct {
 	Logger             *slog.Logger
+	AuditRepo          *audit.Repo
 	ClusterRepo        *storage.ClusterRepo
 	SparkSubmitTimeout time.Duration
 	HTTPClient         *httpclient.Client

internal/mcp/tools/fetch_upload_test.go

@@ -16,6 +16,7 @@ import (
 
 	"github.com/mark3labs/mcp-go/mcp"
 
+	"spark-mcp-go/internal/audit"
 	"spark-mcp-go/internal/cluster"
 	"spark-mcp-go/internal/httpclient"
 	"spark-mcp-go/internal/storage"
@@ -24,7 +25,7 @@ import (
 
 // testDepsWithDataDir returns dependencies backed by an in-memory DB and a
 // temporary data directory.
-func testDepsWithDataDir(t *testing.T) (*Deps, *storage.ClusterRepo) {
+func testDepsWithDataDir(t *testing.T) (*Deps, *storage.ClusterRepo, *audit.Repo) {
 	t.Helper()
 	db, err := storage.Open(":memory:")
 	if err != nil {
@@ -43,11 +44,12 @@ func testDepsWithDataDir(t *testing.T) (*Deps, *storage.ClusterRepo) {
 			Timeout:          5 * time.Second,
 			MaxResponseBytes: 1 << 20,
 		}),
+		AuditRepo:        audit.NewRepo(db),
 		ClusterRepo:      db.Clusters(),
 		MaxResponseBytes: 1 << 20,
 		DataDir:          dataDir,
 		UploadStore:      uploadStore,
-	}, db.Clusters()
+	}, db.Clusters(), audit.NewRepo(db)
 }
 
 // createCluster creates a cluster in the repository with the given fields.
@@ -98,7 +100,7 @@ func TestFetchURL(t *testing.T) {
 	}))
 	defer srv.Close()
 
-	deps, repo := testDepsWithDataDir(t)
+	deps, repo, _ := testDepsWithDataDir(t)
 	createCluster(t, repo, &cluster.Cluster{
 		ID:           "cluster-a",
 		Name:         "Cluster A",
@@ -292,7 +294,7 @@ func TestFetchURL_RedirectPreservesAuth(t *testing.T) {
 	}))
 	defer server1.Close()
 
-	deps, repo := testDepsWithDataDir(t)
+	deps, repo, _ := testDepsWithDataDir(t)
 	createCluster(t, repo, &cluster.Cluster{
 		ID:           "cluster-redirect",
 		Name:         "Redirect",
@@ -321,7 +323,7 @@ func TestFetchURL_RedirectPreservesAuth(t *testing.T) {
 }
 
 func TestUploadFile(t *testing.T) {
-	deps, _ := testDepsWithDataDir(t)
+	deps, _, auditRepo := testDepsWithDataDir(t)
 
 	req := newToolRequest(UploadFileName, map[string]any{
 		"filename": "hello.txt",
@@ -367,10 +369,25 @@ func TestUploadFile(t *testing.T) {
 	if info.Mode().Perm() != 0o640 {
 		t.Errorf("mode=%o, want %o", info.Mode().Perm(), 0o640)
 	}
+
+	entries, err := auditRepo.List(context.Background(), 100)
+	if err != nil {
+		t.Fatalf("list audit: %v", err)
+	}
+	found := false
+	for _, e := range entries {
+		if e.Action == audit.ActionUploadCreate && e.Actor == "tool:upload_file" && e.ClusterID == fileID {
+			found = true
+			break
+		}
+	}
+	if !found {
+		t.Errorf("missing upload.create audit entry for file_id %s", fileID)
+	}
 }
 
 func TestUploadFile_PathTraversal(t *testing.T) {
-	deps, _ := testDepsWithDataDir(t)
+	deps, _, _ := testDepsWithDataDir(t)
 
 	cases := []string{
 		"../../../etc/passwd",
@@ -401,7 +418,7 @@ func TestUploadFile_PathTraversal(t *testing.T) {
 }
 
 func TestUploadFile_Base64(t *testing.T) {
-	deps, _ := testDepsWithDataDir(t)
+	deps, _, _ := testDepsWithDataDir(t)
 
 	req := newToolRequest(UploadFileName, map[string]any{
 		"filename": "hello.bin",

internal/mcp/tools/spark_submit_path_test.go

@@ -14,7 +14,7 @@ import (
 )
 
 func TestSparkSubmit_StructuredCommand(t *testing.T) {
-	deps, repo := testDepsWithDataDir(t)
+	deps, repo, _ := testDepsWithDataDir(t)
 	deps.SparkSubmitTimeout = 5 * time.Second
 	store := deps.UploadStore
 
@@ -98,7 +98,7 @@ func TestSparkSubmit_StructuredCommand(t *testing.T) {
 }
 
 func TestSparkSubmit_MissingRequiredField(t *testing.T) {
-	deps, _ := testDepsWithDataDir(t)
+	deps, _, _ := testDepsWithDataDir(t)
 	store := deps.UploadStore
 	_, _, _, _, mintedPath, err := store.Save([]byte("# dummy\n"), "dummy.py")
 	if err != nil {
@@ -131,7 +131,7 @@ func TestSparkSubmit_MissingRequiredField(t *testing.T) {
 }
 
 func TestSparkSubmit_BadSparkConfValue(t *testing.T) {
-	deps, _ := testDepsWithDataDir(t)
+	deps, _, _ := testDepsWithDataDir(t)
 	store := deps.UploadStore
 	_, _, _, _, mintedPath, err := store.Save([]byte("# dummy\n"), "dummy.py")
 	if err != nil {
@@ -166,7 +166,7 @@ func TestSparkSubmit_BadSparkConfValue(t *testing.T) {
 }
 
 func TestSparkSubmit_RejectsNonMintedPath(t *testing.T) {
-	deps, _ := testDepsWithDataDir(t)
+	deps, _, _ := testDepsWithDataDir(t)
 
 	unminted := filepath.Join(t.TempDir(), "unminted.py")
 	if err := os.WriteFile(unminted, []byte("print('not from upload_file')\n"), 0o644); err != nil {
@@ -200,7 +200,7 @@ func TestSparkSubmit_RejectsNonMintedPath(t *testing.T) {
 }
 
 func TestSparkSubmit_EmptyMaster(t *testing.T) {
-	deps, _ := testDepsWithDataDir(t)
+	deps, _, _ := testDepsWithDataDir(t)
 	store := deps.UploadStore
 	_, _, _, _, mintedPath, err := store.Save([]byte("# dummy\n"), "dummy.py")
 	if err != nil {

internal/mcp/tools/upload_file.go

@@ -8,6 +8,8 @@ import (
 	"regexp"
 
 	"github.com/mark3labs/mcp-go/mcp"
+
+	"spark-mcp-go/internal/audit"
 )
 
 const UploadFileName = "upload_file"
@@ -76,6 +78,21 @@ func (d *Deps) UploadFileHandler(ctx context.Context, req mcp.CallToolRequest) (
 		return errResult("upload_file: save upload: " + err.Error()), nil
 	}
 
+	if d.AuditRepo != nil {
+		details, _ := audit.MarshalDetails(map[string]any{
+			"file_id": fileID,
+			"name":    filename,
+			"size":    size,
+			"sha256":  sha256Hex,
+		})
+		_ = d.AuditRepo.Insert(ctx, &audit.Entry{
+			Actor:     "tool:upload_file",
+			Action:    audit.ActionUploadCreate,
+			ClusterID: fileID,
+			Details:   details,
+		})
+	}
+
 	result := map[string]any{
 		"file_id": fileID,
 		"path":    absPath,

internal/storage/sqlite.go

@@ -38,6 +38,15 @@ CREATE TABLE IF NOT EXISTS audit_log (
   details     TEXT
 );
 CREATE INDEX IF NOT EXISTS idx_audit_ts ON audit_log(timestamp DESC);
+
+CREATE TABLE IF NOT EXISTS upload_files (
+  file_id      TEXT PRIMARY KEY,
+  name         TEXT NOT NULL,
+  size         INTEGER NOT NULL,
+  sha256       TEXT NOT NULL,
+  uploaded_at  INTEGER NOT NULL
+);
+CREATE INDEX IF NOT EXISTS idx_uploads_ts ON upload_files(uploaded_at DESC);
 `
 
 // DB is the storage handle.

internal/storage/upload_repo.go

@@ -0,0 +1,147 @@
+package storage
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+)
+
+// UploadMeta is the database index record for an uploaded file.
+//
+// The .meta.json sidecar remains the source of truth; this struct is the
+// queryable mirror used by the admin UI.
+type UploadMeta struct {
+	FileID     string    `json:"file_id"`
+	Name       string    `json:"name"`
+	Size       int64     `json:"size"`
+	SHA256     string    `json:"sha256"`
+	UploadedAt time.Time `json:"uploaded_at"`
+}
+
+// UploadRepo provides CRUD operations for upload file index records.
+type UploadRepo struct {
+	db *DB
+}
+
+// Uploads returns a repository bound to this DB handle.
+func (d *DB) Uploads() *UploadRepo {
+	return &UploadRepo{db: d}
+}
+
+// Create inserts a new upload index record. Timestamps are stored as Unix
+// nanoseconds for stable ORDER BY semantics.
+func (r *UploadRepo) Create(ctx context.Context, fileID, name string, size int64, sha256Hex string, uploadedAt time.Time) error {
+	_, err := r.db.sqlDB.ExecContext(ctx, `
+		INSERT INTO upload_files (file_id, name, size, sha256, uploaded_at)
+		VALUES (?, ?, ?, ?, ?)`,
+		fileID, name, size, sha256Hex, uploadedAt.UnixNano(),
+	)
+	if err != nil {
+		if strings.Contains(err.Error(), "UNIQUE constraint failed") {
+			return fmt.Errorf("storage: create upload %s: primary key conflict: %w", fileID, err)
+		}
+		return fmt.Errorf("storage: create upload %s: %w", fileID, err)
+	}
+	return nil
+}
+
+// Get retrieves an upload index record by file_id. If the record does not
+// exist, it returns ErrNotFound.
+func (r *UploadRepo) Get(ctx context.Context, fileID string) (UploadMeta, error) {
+	row := r.db.sqlDB.QueryRowContext(ctx, `
+		SELECT file_id, name, size, sha256, uploaded_at
+		FROM upload_files
+		WHERE file_id = ?`, fileID)
+
+	m, err := scanUpload(row.Scan)
+	if errors.Is(err, sql.ErrNoRows) {
+		return UploadMeta{}, ErrNotFound
+	}
+	if err != nil {
+		return UploadMeta{}, fmt.Errorf("storage: get upload %s: %w", fileID, err)
+	}
+	return m, nil
+}
+
+// List returns upload index records ordered by uploaded_at descending.
+//
+// If search is non-empty, name is filtered with a case-insensitive LIKE.
+// A limit of zero or less falls back to 100; values above 500 are capped.
+func (r *UploadRepo) List(ctx context.Context, search string, limit int) ([]UploadMeta, error) {
+	if limit <= 0 {
+		limit = 100
+	}
+	if limit > 500 {
+		limit = 500
+	}
+
+	var rows *sql.Rows
+	var err error
+	if search != "" {
+		rows, err = r.db.sqlDB.QueryContext(ctx, `
+			SELECT file_id, name, size, sha256, uploaded_at
+			FROM upload_files
+			WHERE name LIKE ?
+			ORDER BY uploaded_at DESC
+			LIMIT ?`,
+			"%"+search+"%", limit,
+		)
+	} else {
+		rows, err = r.db.sqlDB.QueryContext(ctx, `
+			SELECT file_id, name, size, sha256, uploaded_at
+			FROM upload_files
+			ORDER BY uploaded_at DESC
+			LIMIT ?`, limit)
+	}
+	if err != nil {
+		return nil, fmt.Errorf("storage: list uploads: %w", err)
+	}
+	defer rows.Close()
+
+	var out []UploadMeta
+	for rows.Next() {
+		m, err := scanUpload(rows.Scan)
+		if err != nil {
+			return nil, fmt.Errorf("storage: list uploads: %w", err)
+		}
+		out = append(out, m)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("storage: list uploads: %w", err)
+	}
+	if out == nil {
+		// Force empty slice (not null) in JSON.
+		out = []UploadMeta{}
+	}
+	return out, nil
+}
+
+// Delete removes an upload index record by file_id. If the record does not
+// exist, it returns ErrNotFound.
+func (r *UploadRepo) Delete(ctx context.Context, fileID string) error {
+	res, err := r.db.sqlDB.ExecContext(ctx, `DELETE FROM upload_files WHERE file_id = ?`, fileID)
+	if err != nil {
+		return fmt.Errorf("storage: delete upload %s: %w", fileID, err)
+	}
+	n, err := res.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("storage: delete upload %s: rows affected: %w", fileID, err)
+	}
+	if n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+func scanUpload(scan scanFunc) (UploadMeta, error) {
+	var m UploadMeta
+	var uploadedAt int64
+	if err := scan(&m.FileID, &m.Name, &m.Size, &m.SHA256, &uploadedAt); err != nil {
+		return UploadMeta{}, err
+	}
+	m.UploadedAt = time.Unix(0, uploadedAt)
+	return m, nil
+}

internal/storage/upload_repo_test.go

@@ -0,0 +1,162 @@
+package storage
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"testing"
+	"time"
+)
+
+func newUploadRepo(t *testing.T) *UploadRepo {
+	t.Helper()
+	db, err := Open(":memory:")
+	if err != nil {
+		t.Fatalf("Open in-memory db: %v", err)
+	}
+	t.Cleanup(func() { _ = db.Close() })
+	return db.Uploads()
+}
+
+func assertUploadEqual(t *testing.T, got, want UploadMeta) {
+	t.Helper()
+	if got.FileID != want.FileID {
+		t.Errorf("FileID: got %q, want %q", got.FileID, want.FileID)
+	}
+	if got.Name != want.Name {
+		t.Errorf("Name: got %q, want %q", got.Name, want.Name)
+	}
+	if got.Size != want.Size {
+		t.Errorf("Size: got %d, want %d", got.Size, want.Size)
+	}
+	if got.SHA256 != want.SHA256 {
+		t.Errorf("SHA256: got %q, want %q", got.SHA256, want.SHA256)
+	}
+	if !got.UploadedAt.Equal(want.UploadedAt) {
+		t.Errorf("UploadedAt: got %v, want %v", got.UploadedAt, want.UploadedAt)
+	}
+}
+
+func TestUploadRepo_CreateGetListDelete(t *testing.T) {
+	repo := newUploadRepo(t)
+	ctx := context.Background()
+	uploadedAt := time.Unix(0, time.Now().UnixNano())
+	want := UploadMeta{
+		FileID:     "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+		Name:       "report.csv",
+		Size:       42,
+		SHA256:     "deadbeef",
+		UploadedAt: uploadedAt,
+	}
+	if err := repo.Create(ctx, want.FileID, want.Name, want.Size, want.SHA256, want.UploadedAt); err != nil {
+		t.Fatalf("Create: %v", err)
+	}
+	got, err := repo.Get(ctx, want.FileID)
+	if err != nil {
+		t.Fatalf("Get: %v", err)
+	}
+	assertUploadEqual(t, got, want)
+	if err := repo.Create(ctx, want.FileID, "other", 1, "abcd", time.Now()); err == nil {
+		t.Errorf("duplicate Create succeeded, want error")
+	}
+	list, err := repo.List(ctx, "", 100)
+	if err != nil {
+		t.Fatalf("List: %v", err)
+	}
+	if len(list) != 1 {
+		t.Fatalf("List len: got %d, want 1", len(list))
+	}
+	assertUploadEqual(t, list[0], want)
+	if err := repo.Delete(ctx, want.FileID); err != nil {
+		t.Fatalf("Delete: %v", err)
+	}
+	if _, err := repo.Get(ctx, want.FileID); !errors.Is(err, ErrNotFound) {
+		t.Fatalf("Get after Delete: got %v, want ErrNotFound", err)
+	}
+	if err := repo.Delete(ctx, want.FileID); !errors.Is(err, ErrNotFound) {
+		t.Fatalf("Delete again: got %v, want ErrNotFound", err)
+	}
+}
+
+func TestUploadRepo_ListOrderAndSearch(t *testing.T) {
+	repo := newUploadRepo(t)
+	ctx := context.Background()
+	base := time.Unix(0, time.Now().UnixNano())
+	records := []UploadMeta{
+		{FileID: "00000000000000000000000000000001", Name: "alpha.csv", Size: 1, SHA256: "a", UploadedAt: base.Add(-2 * time.Hour)},
+		{FileID: "00000000000000000000000000000002", Name: "beta.log", Size: 2, SHA256: "b", UploadedAt: base.Add(-1 * time.Hour)},
+		{FileID: "00000000000000000000000000000003", Name: "gamma.csv", Size: 3, SHA256: "c", UploadedAt: base},
+	}
+	for _, r := range records {
+		if err := repo.Create(ctx, r.FileID, r.Name, r.Size, r.SHA256, r.UploadedAt); err != nil {
+			t.Fatalf("Create %s: %v", r.FileID, err)
+		}
+	}
+	all, err := repo.List(ctx, "", 100)
+	if err != nil {
+		t.Fatalf("List: %v", err)
+	}
+	if len(all) != 3 {
+		t.Fatalf("List len: got %d, want 3", len(all))
+	}
+	wantOrder := []string{"00000000000000000000000000000003", "00000000000000000000000000000002", "00000000000000000000000000000001"}
+	for i, id := range wantOrder {
+		if all[i].FileID != id {
+			t.Errorf("List order[%d]: got %q, want %q", i, all[i].FileID, id)
+		}
+	}
+	csv, err := repo.List(ctx, "csv", 100)
+	if err != nil {
+		t.Fatalf("List search: %v", err)
+	}
+	if len(csv) != 2 {
+		t.Fatalf("search csv len: got %d, want 2", len(csv))
+	}
+	if csv[0].Name != "gamma.csv" || csv[1].Name != "alpha.csv" {
+		t.Errorf("search csv order: got %v", []string{csv[0].Name, csv[1].Name})
+	}
+	beta, err := repo.List(ctx, "beta", 100)
+	if err != nil {
+		t.Fatalf("List search beta: %v", err)
+	}
+	if len(beta) != 1 || beta[0].Name != "beta.log" {
+		t.Errorf("search beta: got %+v", beta)
+	}
+}
+
+func TestUploadRepo_ListLimitCap(t *testing.T) {
+	repo := newUploadRepo(t)
+	ctx := context.Background()
+	base := time.Unix(0, time.Now().UnixNano())
+	for i := 0; i < 10; i++ {
+		id := fmt.Sprintf("%032d", i)
+		if err := repo.Create(ctx, id, "x", int64(i), "h", base.Add(time.Duration(i)*time.Second)); err != nil {
+			t.Fatalf("Create %d: %v", i, err)
+		}
+	}
+	list, err := repo.List(ctx, "", 0)
+	if err != nil {
+		t.Fatalf("List default limit: %v", err)
+	}
+	// Default limit is 100 but only 10 rows exist.
+	if len(list) != 10 {
+		t.Errorf("default limit: got %d, want 10", len(list))
+	}
+
+	list, err = repo.List(ctx, "", 501)
+	if err != nil {
+		t.Fatalf("List cap: %v", err)
+	}
+	if len(list) != 10 {
+		t.Errorf("cap limit: got %d, want 10", len(list))
+	}
+
+	// Explicit small limit is respected.
+	list, err = repo.List(ctx, "", 3)
+	if err != nil {
+		t.Fatalf("List small limit: %v", err)
+	}
+	if len(list) != 3 {
+		t.Errorf("small limit: got %d, want 3", len(list))
+	}
+}

internal/uploads/store.go

@@ -9,12 +9,16 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"regexp"
 	"strings"
 	"time"
+
+	"spark-mcp-go/internal/storage"
 )
 
 var fileIDRegex = regexp.MustCompile(`^[0-9a-f]{32}$`)
@@ -22,6 +26,20 @@ var fileIDRegex = regexp.MustCompile(`^[0-9a-f]{32}$`)
 // Store is a local file store rooted at Root.
 type Store struct {
 	Root string
+	repo UploadsDB
+}
+
+// UploadsDB is the minimal surface the Store needs from an upload index.
+type UploadsDB interface {
+	Create(ctx context.Context, fileID, name string, size int64, sha256Hex string, uploadedAt time.Time) error
+	Get(ctx context.Context, fileID string) (storage.UploadMeta, error)
+}
+
+// SetRepo binds an upload index repository for dual-write. The DB is an
+// index only; failures are logged but never fail the file write because
+// .meta.json is the source of truth and startup backfill can recover.
+func (s *Store) SetRepo(repo UploadsDB) {
+	s.repo = repo
 }
 
 // New creates a Store rooted at root. It creates root with mode 0o750 if it
@@ -111,6 +129,13 @@ func (s *Store) Save(data []byte, originalName string) (fileID, name string, siz
 		return "", "", 0, "", "", fmt.Errorf("uploads: write sidecar: %w", err)
 	}
 
+	// Index the upload in the DB as a best-effort mirror of the sidecar.
+	if s.repo != nil {
+		if dbErr := s.repo.Create(context.Background(), fileID, originalName, meta.Size, sha256Hex, meta.UploadedAt); dbErr != nil {
+			slog.Default().Warn("uploads: failed to index upload in DB", "file_id", fileID, "err", dbErr)
+		}
+	}
+
 	return fileID, originalName, meta.Size, sha256Hex, absPath, nil
 }
 
@@ -240,6 +265,54 @@ func (s *Store) Sweep(ctx context.Context, ttl time.Duration) (deleted int, err
 	return deleted, nil
 }
 
+// Backfill walks Root and inserts a DB index row for every existing
+// .meta.json sidecar that is not already indexed. It is the recovery path
+// for sidecars created before the DB table existed.
+func (s *Store) Backfill(ctx context.Context, repo UploadsDB) (inserted int, err error) {
+	entries, err := os.ReadDir(s.Root)
+	if err != nil {
+		return 0, fmt.Errorf("uploads: backfill read root: %w", err)
+	}
+
+	for _, e := range entries {
+		if err := ctx.Err(); err != nil {
+			return inserted, err
+		}
+
+		name := e.Name()
+		base := strings.TrimSuffix(name, ".meta.json")
+		if base == name || !fileIDRegex.MatchString(base) {
+			continue
+		}
+
+		metaPath := filepath.Join(s.Root, name)
+		sc, err := readSidecar(metaPath)
+		if err != nil {
+			// Skip corrupt sidecars; Sweep will reap them later.
+			continue
+		}
+
+		_, getErr := repo.Get(ctx, base)
+		if getErr == nil {
+			continue
+		}
+		if !errors.Is(getErr, storage.ErrNotFound) {
+			return inserted, fmt.Errorf("uploads: backfill lookup %s: %w", base, getErr)
+		}
+
+		createErr := repo.Create(ctx, base, sc.Name, sc.Size, sc.Sha256, sc.UploadedAt)
+		if createErr != nil {
+			if strings.Contains(createErr.Error(), "UNIQUE constraint failed") {
+				continue
+			}
+			return inserted, fmt.Errorf("uploads: backfill index %s: %w", base, createErr)
+		}
+		inserted++
+	}
+
+	return inserted, nil
+}
+
 func newFileID() (string, error) {
 	var b [16]byte
 	if _, err := rand.Read(b[:]); err != nil {
@@ -249,16 +322,24 @@ func newFileID() (string, error) {
 }
 
 func readUploadedAt(path string) (time.Time, error) {
-	data, err := os.ReadFile(path)
+	sc, err := readSidecar(path)
 	if err != nil {
 		return time.Time{}, err
 	}
-	var sc sidecar
-	if err := json.Unmarshal(data, &sc); err != nil {
-		return time.Time{}, err
-	}
 	if sc.UploadedAt.IsZero() {
 		return time.Time{}, fmt.Errorf("uploads: missing uploaded_at")
 	}
 	return sc.UploadedAt, nil
 }
+
+func readSidecar(path string) (sidecar, error) {
+	var sc sidecar
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return sc, err
+	}
+	if err := json.Unmarshal(data, &sc); err != nil {
+		return sc, err
+	}
+	return sc, nil
+}

internal/uploads/store_test.go

@@ -5,12 +5,15 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 	"path/filepath"
 	"regexp"
 	"testing"
 	"time"
+
+	"spark-mcp-go/internal/storage"
 )
 
 func TestStore_SaveAndRetrieve(t *testing.T) {
@@ -351,3 +354,180 @@ func TestStore_Sweep_DeletesDataWithCorruptSidecar(t *testing.T) {
 		t.Errorf("corrupt sidecar still exists")
 	}
 }
+
+type fakeUploadRepo struct {
+	calls []storage.UploadMeta
+	err   error
+}
+
+func (f *fakeUploadRepo) Create(ctx context.Context, fileID, name string, size int64, sha256Hex string, uploadedAt time.Time) error {
+	f.calls = append(f.calls, storage.UploadMeta{
+		FileID: fileID, Name: name, Size: size, SHA256: sha256Hex, UploadedAt: uploadedAt,
+	})
+	return f.err
+}
+
+func (f *fakeUploadRepo) Get(ctx context.Context, fileID string) (storage.UploadMeta, error) {
+	for _, m := range f.calls {
+		if m.FileID == fileID {
+			return m, nil
+		}
+	}
+	return storage.UploadMeta{}, storage.ErrNotFound
+}
+
+func (f *fakeUploadRepo) List(ctx context.Context, search string, limit int) ([]storage.UploadMeta, error) {
+	return f.calls, nil
+}
+
+func (f *fakeUploadRepo) Delete(ctx context.Context, fileID string) error {
+	return nil
+}
+
+func TestStore_Save_DualWrite(t *testing.T) {
+	store, err := New(t.TempDir())
+	if err != nil {
+		t.Fatalf("new store: %v", err)
+	}
+	repo := &fakeUploadRepo{}
+	store.SetRepo(repo)
+
+	data := []byte("dual-write test")
+	fileID, _, size, sha256Hex, absPath, err := store.Save(data, "dual.txt")
+	if err != nil {
+		t.Fatalf("save: %v", err)
+	}
+	if absPath == "" {
+		t.Fatal("absPath empty")
+	}
+	if len(repo.calls) != 1 {
+		t.Fatalf("repo.Create calls: got %d, want 1", len(repo.calls))
+	}
+	call := repo.calls[0]
+	if call.FileID != fileID {
+		t.Errorf("FileID: got %q, want %q", call.FileID, fileID)
+	}
+	if call.Name != "dual.txt" {
+		t.Errorf("Name: got %q, want dual.txt", call.Name)
+	}
+	if call.Size != size {
+		t.Errorf("Size: got %d, want %d", call.Size, size)
+	}
+	if call.SHA256 != sha256Hex {
+		t.Errorf("SHA256: got %q, want %q", call.SHA256, sha256Hex)
+	}
+	if call.UploadedAt.IsZero() {
+		t.Errorf("UploadedAt is zero")
+	}
+}
+
+func TestStore_Save_RepoErrorDoesNotFailUpload(t *testing.T) {
+	store, err := New(t.TempDir())
+	if err != nil {
+		t.Fatalf("new store: %v", err)
+	}
+	repo := &fakeUploadRepo{err: errors.New("db down")}
+	store.SetRepo(repo)
+
+	data := []byte("db error test")
+	fileID, _, _, _, absPath, err := store.Save(data, "error.txt")
+	if err != nil {
+		t.Fatalf("save should not fail when repo errors: %v", err)
+	}
+	if _, err := os.Stat(absPath); err != nil {
+		t.Errorf("data file missing: %v", err)
+	}
+	if _, err := os.Stat(absPath + ".meta.json"); err != nil {
+		t.Errorf("sidecar missing: %v", err)
+	}
+	if len(repo.calls) != 1 {
+		t.Errorf("repo.Create calls: got %d, want 1", len(repo.calls))
+	}
+	if repo.calls[0].FileID != fileID {
+		t.Errorf("repo call file_id: got %q, want %q", repo.calls[0].FileID, fileID)
+	}
+}
+
+func TestStore_Backfill(t *testing.T) {
+	store, err := New(t.TempDir())
+	if err != nil {
+		t.Fatalf("new store: %v", err)
+	}
+	repo := &fakeUploadRepo{}
+
+	now := time.Now()
+	ids := []string{
+		"00000000000000000000000000000001",
+		"00000000000000000000000000000002",
+		"00000000000000000000000000000003",
+	}
+	for i, id := range ids {
+		sc := map[string]any{
+			"name":        fmt.Sprintf("file%d.txt", i),
+			"size":        i + 1,
+			"sha256":      fmt.Sprintf("sha%d", i),
+			"uploaded_at": now.Add(time.Duration(i) * time.Second).Format(time.RFC3339Nano),
+		}
+		b, _ := json.Marshal(sc)
+		if err := os.WriteFile(filepath.Join(store.Root, id+".meta.json"), b, 0o600); err != nil {
+			t.Fatalf("create sidecar %s: %v", id, err)
+		}
+	}
+
+	inserted, err := store.Backfill(context.Background(), repo)
+	if err != nil {
+		t.Fatalf("backfill: %v", err)
+	}
+	if inserted != 3 {
+		t.Errorf("inserted=%d, want 3", inserted)
+	}
+	if len(repo.calls) != 3 {
+		t.Errorf("repo.Create calls: got %d, want 3", len(repo.calls))
+	}
+
+	// Second backfill must skip existing rows.
+	inserted, err = store.Backfill(context.Background(), repo)
+	if err != nil {
+		t.Fatalf("second backfill: %v", err)
+	}
+	if inserted != 0 {
+		t.Errorf("second inserted=%d, want 0", inserted)
+	}
+	if len(repo.calls) != 3 {
+		t.Errorf("repo.Create calls after second backfill: got %d, want 3", len(repo.calls))
+	}
+}
+
+func TestStore_Backfill_SkipsExisting(t *testing.T) {
+	store, err := New(t.TempDir())
+	if err != nil {
+		t.Fatalf("new store: %v", err)
+	}
+	repo := &fakeUploadRepo{}
+
+	id := "00000000000000000000000000000004"
+	now := time.Now()
+	sc := map[string]any{
+		"name":        "existing.txt",
+		"size":        5,
+		"sha256":      "sha",
+		"uploaded_at": now.Format(time.RFC3339Nano),
+	}
+	b, _ := json.Marshal(sc)
+	if err := os.WriteFile(filepath.Join(store.Root, id+".meta.json"), b, 0o600); err != nil {
+		t.Fatalf("create sidecar: %v", err)
+	}
+
+	// Pre-seed the repo so the sidecar is already indexed.
+	if err := repo.Create(context.Background(), id, "existing.txt", 5, "sha", now); err != nil {
+		t.Fatalf("seed repo: %v", err)
+	}
+
+	inserted, err := store.Backfill(context.Background(), repo)
+	if err != nil {
+		t.Fatalf("backfill: %v", err)
+	}
+	if inserted != 0 {
+		t.Errorf("inserted=%d, want 0", inserted)
+	}
+}

main.go

@@ -84,6 +84,19 @@ func run() error {
 		logger.Info("uploads.sweep", "deleted", n)
 	}
 
+	backfillCtx, backfillCancel := context.WithTimeout(context.Background(), startupSweepTimeout)
+	n, err = uploadStore.Backfill(backfillCtx, db.Uploads())
+	backfillCancel()
+	if errors.Is(err, context.DeadlineExceeded) {
+		logger.Warn("uploads.backfill.timeout", "inserted", n, "err", err)
+	} else if err != nil {
+		logger.Error("uploads.backfill", "err", err)
+	} else {
+		logger.Info("uploads.backfill", "inserted", n)
+	}
+
+	uploadStore.SetRepo(db.Uploads())
+
 	gin.SetMode(cfg.GinMode)
 	r := gin.New()
 	r.Use(gin.Recovery())
@@ -92,10 +105,11 @@ func run() error {
 		c.JSON(http.StatusOK, gin.H{"ok": true, "version": "0.0.0"})
 	})
 
-	admin.Mount(r, db.Clusters(), audit.NewRepo(db), cfg.AdminTokens)
+	admin.Mount(r, db.Clusters(), db.Uploads(), audit.NewRepo(db), &uploadStore, cfg.AdminTokens)
 
 	mcpHandler, err := mcpsrv.Handler(&tools.Deps{
 		Logger:             logger.With("component", "mcp"),
+		AuditRepo:          audit.NewRepo(db),
 		ClusterRepo:        db.Clusters(),
 		SparkSubmitTimeout: cfg.SparkSubmitTimeout,
 		HTTPClient: httpclient.New(httpclient.Config{