Feat v0.4.3 backlinks wikilinks (#25)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

CHANGELOG.md

@@ -2,6 +2,47 @@
 
 All notable changes to Switchboard Core are documented here.
 
+## v0.4.3 — Backlinks + Wikilinks
+
+### Added
+
+- **Links table** (`ext_notes_links`): source_id, target_id, link_text columns
+  with indexes on source_id and target_id for bidirectional lookup.
+- **Wikilink extraction**: `_extract_wikilinks()` parses `[[...]]` patterns
+  using `split("[[")` + `find("]]")` (Starlark has no regex or while loops).
+  Returns deduplicated list of link text strings.
+- **Link sync on save**: `_sync_links()` called from `_create_note` and
+  `_update_note` when body changes. Follows the tags delete-all + reinsert
+  pattern. Resolves link text to note IDs via case-insensitive title matching.
+  Unresolved links stored with empty `target_id`.
+- **Cascade delete**: Hard-deleting a note removes both outgoing links
+  (source_id matches) and incoming backlinks (target_id matches).
+- **Link API endpoints**: `GET /links/:note_id` returns outgoing links.
+  `GET /backlinks/:note_id` returns incoming links enriched with source note
+  titles to avoid extra frontend round-trips.
+- **Wikilink preview rendering**: `[[Note Title]]` syntax renders as clickable
+  accent-colored links in the markdown preview. Unresolved wikilinks styled
+  in danger/red with dashed underline.
+- **Wikilink click navigation**: Clicking a resolved wikilink navigates to the
+  target note. Clicking an unresolved wikilink creates the note and navigates
+  to it, then re-saves the source note so the link resolves to blue.
+- **Backlinks panel**: Collapsible panel below the editor showing all notes
+  that link to the current note. Each backlink displays source title and link
+  text. Click to navigate. Hidden when no backlinks exist.
+- **Updated stats**: `/stats` response now includes `links` count.
+
+### Data model
+
+| Table | Columns |
+|-------|---------|
+| `ext_notes_links` | source_id, target_id, link_text |
+
+### Notes package version
+
+0.3.0 → 0.4.0
+
+---
+
 ## v0.4.2 — Tags + Search
 
 ### Added

ROADMAP.md

@@ -1,6 +1,6 @@
 # Switchboard Core — Roadmap
 
-## Current: v0.4.2 — Tags + Search
+## Current: v0.4.3 — Backlinks + Wikilinks
 
 Fork of chat-switchboard, gutted to a pure extension platform. All AI/chat
 features removed from the kernel. What remains is the minimum viable
@@ -267,11 +267,19 @@ Zero platform special-casing. Proves the full extension stack E2E.
 | Drag-and-drop | ✅ | `NoteCard` is draggable. `FolderNode`, "All Notes", and "Unfiled" are drop targets. Uses existing move-note API. |
 | Folder context menu | ✅ | Replaced `prompt()` hack with proper right-click popup menu: Add subfolder, Rename, Delete. Positioned at click coordinates, dismissed on outside click. |
 
-### v0.4.3 — Backlinks + Wikilinks (planned)
+### v0.4.3 — Backlinks + Wikilinks (complete)
 
-- `note_links` table (source, target, link_text)
+| Step | Status | Description |
-- `[[wikilink]]` extraction on save
+|------|--------|-------------|
-- Backlinks panel, clickable links in preview
+| Links table | ✅ | `ext_notes_links` — source_id, target_id, link_text. Indexed on both source_id and target_id for bidirectional lookup. |
+| Wikilink extraction | ✅ | `_extract_wikilinks()` parses `[[...]]` using `split("[[")` + `find("]]")` (no regex/while in Starlark). Deduplicates by lowercase. |
+| Link sync on save | ✅ | `_sync_links()` called from `_create_note` and `_update_note`. Delete-all + reinsert pattern (matches tags). Resolves titles to note IDs (case-insensitive). Unresolved links stored with `target_id=""`. |
+| Cascade delete | ✅ | Hard-deleting a note removes both outgoing links (source_id) and incoming backlinks (target_id). |
+| Link endpoints | ✅ | `GET /links/:note_id` (outgoing) and `GET /backlinks/:note_id` (incoming, enriched with source titles). |
+| Wikilink preview | ✅ | `[[Note Title]]` rendered as clickable accent-colored links in markdown preview. Unresolved links styled in danger/red. |
+| Wikilink navigation | ✅ | Clicking a resolved wikilink navigates to the target note. Clicking an unresolved (red) link creates the note, navigates to it, and re-saves the source so the link resolves. |
+| Backlinks panel | ✅ | Collapsible panel below editor showing all notes linking to current note. Click to navigate. Hidden when empty. |
+| Stats update | ✅ | `/stats` includes `links` count. Notes package version bumped to 0.4.0. |
 
 ### v0.4.4 — Rich Editor + Import/Export (planned)
 

VERSION

@@ -1 +1 @@
-0.4.2
+0.4.3

packages/notes/css/main.css

@@ -529,6 +529,80 @@
   outline-offset: -2px;
 }
 
+/* ── Wikilinks ──────────────────────────── */
+.wikilink {
+  color: var(--accent);
+  text-decoration: none;
+  border-bottom: 1px dashed var(--accent);
+  cursor: pointer;
+}
+.wikilink:hover {
+  border-bottom-style: solid;
+}
+.wikilink.wikilink--unresolved {
+  color: var(--danger, #e53e3e);
+  border-bottom-color: var(--danger, #e53e3e);
+  opacity: 0.7;
+}
+.wikilink.wikilink--unresolved:hover {
+  opacity: 1;
+}
+
+/* ── Backlinks Panel ────────────────────── */
+.backlinks-panel {
+  border-top: 1px solid var(--border);
+  padding: 10px 16px;
+  background: var(--bg-raised);
+  flex-shrink: 0;
+  max-height: 200px;
+  overflow-y: auto;
+}
+.backlinks-panel__header {
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--text-2);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  margin-bottom: 6px;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  cursor: pointer;
+  user-select: none;
+}
+.backlinks-panel__toggle {
+  font-size: 9px;
+  color: var(--text-2);
+}
+.backlinks-panel__count {
+  background: var(--bg-hover);
+  color: var(--text-2);
+  font-size: 10px;
+  padding: 0 6px;
+  border-radius: 8px;
+  line-height: 16px;
+}
+.backlinks-panel__item {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 4px 8px;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 13px;
+}
+.backlinks-panel__item:hover {
+  background: var(--bg-hover);
+}
+.backlinks-panel__title {
+  color: var(--accent);
+  font-weight: 500;
+}
+.backlinks-panel__context {
+  color: var(--text-2);
+  font-size: 11px;
+}
+
 /* ── Responsive ──────────────────────────── */
 @media (max-width: 700px) {
   .notes-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); max-height: 40vh; }

packages/notes/js/main.js

@@ -1,5 +1,5 @@
 /**
- * Notes — Surface Entry Point (v0.3.0)
+ * Notes — Surface Entry Point (v0.4.0)
  *
  * Markdown notes surface using the SDK:
  *   sw.api.ext('notes')  — scoped API client
@@ -138,6 +138,10 @@
     s = s.replace(/_(.+?)_/g, '<em>$1</em>');
     // links
     s = s.replace(/\[([^\]]+)\]\(([^)]+)\)/g, '<a href="$2" target="_blank" rel="noopener">$1</a>');
+    // wikilinks: [[Note Title]] → clickable internal link
+    s = s.replace(/\[\[([^\]]+)\]\]/g, function(match, linkText) {
+      return '<a class="wikilink" data-wikilink="' + linkText.trim() + '" href="#">' + linkText.trim() + '</a>';
+    });
     return s;
   }
 
@@ -490,17 +494,57 @@
   }
 
 
+  // ═══════════════════════════════════════════
+  //  BacklinksPanel — incoming wikilinks
+  // ═══════════════════════════════════════════
+
+  function BacklinksPanel({ noteId, onNavigate }) {
+    var [backlinks, setBacklinks] = useState([]);
+    var [collapsed, setCollapsed] = useState(false);
+
+    useEffect(function() {
+      if (!noteId) { setBacklinks([]); return; }
+      api.get('/backlinks/' + noteId).then(function(res) {
+        var items = (res && res.data) || res || [];
+        setBacklinks(Array.isArray(items) ? items : []);
+      }).catch(function() { setBacklinks([]); });
+    }, [noteId]);
+
+    if (!backlinks.length) return null;
+
+    return html`
+      <div class="backlinks-panel">
+        <div class="backlinks-panel__header" onClick=${function() { setCollapsed(!collapsed); }}>
+          <span class="backlinks-panel__toggle">${collapsed ? '▶' : '▼'}</span>
+          <span>Backlinks</span>
+          <span class="backlinks-panel__count">${backlinks.length}</span>
+        </div>
+        ${!collapsed && backlinks.map(function(bl) {
+          return html`
+            <div key=${bl.source_id} class="backlinks-panel__item"
+                 onClick=${function() { if (onNavigate) onNavigate(bl.source_id); }}>
+              <span class="backlinks-panel__title">${bl.source_title}</span>
+              <span class="backlinks-panel__context">via [[${bl.link_text}]]</span>
+            </div>
+          `;
+        })}
+      </div>
+    `;
+  }
+
+
   // ═══════════════════════════════════════════
   //  EditorPane — note editor + preview + tags
   // ═══════════════════════════════════════════
 
-  function EditorPane({ note, folders, allTags, onSave, onDelete, onRefresh, onTagsChanged }) {
+  function EditorPane({ note, folders, allTags, onSave, onDelete, onRefresh, onTagsChanged, onNavigate, onNavigateToTitle }) {
     var [title, setTitle]     = useState(note ? note.title : '');
     var [body, setBody]       = useState(note ? note.body : '');
     var [noteTags, setNoteTags] = useState([]);
     var [preview, setPreview] = useState(false);
     var [dirty, setDirty]     = useState(false);
     var [saving, setSaving]   = useState(false);
+    var [saveCount, setSaveCount] = useState(0);
     var textareaRef = useRef(null);
 
     // sync when note changes
@@ -532,6 +576,7 @@
       try {
         await api.put('/notes/' + note.id, { title: t || 'Untitled', body: b });
         setDirty(false);
+        setSaveCount(function(c) { return c + 1; });
         onRefresh();
       } catch (e) {
         console.error('Save failed:', e);
@@ -584,7 +629,46 @@
       }
     }
 
-    var previewHtml = useMemo(function() { return renderMarkdown(body); }, [body]);
+    // ── Outgoing links for resolved/unresolved styling ──
+    var [outgoingLinks, setOutgoingLinks] = useState([]);
+    useEffect(function() {
+      if (!note) { setOutgoingLinks([]); return; }
+      api.get('/links/' + note.id).then(function(res) {
+        var items = (res && res.data) || res || [];
+        setOutgoingLinks(Array.isArray(items) ? items : []);
+      }).catch(function() { setOutgoingLinks([]); });
+    }, [note ? note.id : null, saveCount]);
+
+    var previewHtml = useMemo(function() {
+      var h = renderMarkdown(body);
+      // mark unresolved wikilinks
+      for (var i = 0; i < outgoingLinks.length; i++) {
+        var link = outgoingLinks[i];
+        if (!link.target_id) {
+          var search = 'class="wikilink" data-wikilink="' + escHtml(link.link_text) + '"';
+          var replace = 'class="wikilink wikilink--unresolved" data-wikilink="' + escHtml(link.link_text) + '"';
+          h = h.split(search).join(replace);
+        }
+      }
+      return h;
+    }, [body, outgoingLinks]);
+
+    // ── Wikilink click handling in preview ──
+    var previewRef = useRef(null);
+    useEffect(function() {
+      var el = previewRef.current;
+      if (!el || !preview) return;
+      function handleClick(e) {
+        var target = e.target;
+        if (target.classList && target.classList.contains('wikilink')) {
+          e.preventDefault();
+          var linkText = target.getAttribute('data-wikilink');
+          if (linkText && onNavigateToTitle) onNavigateToTitle(linkText);
+        }
+      }
+      el.addEventListener('click', handleClick);
+      return function() { el.removeEventListener('click', handleClick); };
+    }, [preview, onNavigateToTitle]);
 
     // build indented folder list for the select dropdown
     var folderOptions = useMemo(function() {
@@ -660,13 +744,14 @@
         <${TagInput} tags=${noteTags} allTags=${allTags} onChange=${handleTagsChange} />
         <div class="notes-editor__body">
           ${preview
-            ? html`<div class="notes-preview" dangerouslySetInnerHTML=${{ __html: previewHtml }} />`
+            ? html`<div class="notes-preview" ref=${previewRef} dangerouslySetInnerHTML=${{ __html: previewHtml }} />`
             : html`<textarea class="notes-editor__textarea" ref=${textareaRef}
                       value=${body} onInput=${handleBodyChange}
                       onKeyDown=${handleKeyDown}
                       placeholder="Start writing in Markdown…" />`
           }
         </div>
+        <${BacklinksPanel} noteId=${note.id} onNavigate=${onNavigate} />
       </div>
     `;
   }
@@ -866,6 +951,41 @@
       } catch (e) { console.error('Delete folder failed:', e); }
     }
 
+    // ── Wikilink navigation by title ─────────
+    async function handleNavigateToTitle(title) {
+      try {
+        var res = await api.get('/search?q=' + encodeURIComponent(title.trim()));
+        var items = (res && res.data) || res || [];
+        if (!Array.isArray(items)) items = [];
+        var match = null;
+        for (var i = 0; i < items.length; i++) {
+          if ((items[i].title || '').toLowerCase().trim() === title.toLowerCase().trim()) {
+            match = items[i];
+            break;
+          }
+        }
+        if (match) {
+          handleSelect(match.id);
+        } else {
+          // create the note and navigate to it
+          var sourceId = activeId;
+          var newNote = await api.post('/notes', { title: title.trim(), body: '' });
+          if (newNote && newNote.id) {
+            // re-save source note so _sync_links resolves the new target
+            if (sourceId && activeNote) {
+              await api.put('/notes/' + sourceId, { body: activeNote.body || '' });
+            }
+            setActiveId(newNote.id);
+            loadNote(newNote.id);
+            loadNotes();
+            loadStats();
+          }
+        }
+      } catch (e) {
+        console.error('Navigate to title failed:', e);
+      }
+    }
+
     // ── Search ────────────────────────────────
     function handleSearch(e) {
       var val = e.target.value;
@@ -916,7 +1036,9 @@
           onSave=${handleRefresh}
           onDelete=${handleDelete}
           onRefresh=${handleRefresh}
-          onTagsChanged=${handleTagsChanged} />
+          onTagsChanged=${handleTagsChanged}
+          onNavigate=${handleSelect}
+          onNavigateToTitle=${handleNavigateToTitle} />
       </div>
     `;
   }

packages/notes/manifest.json

@@ -6,7 +6,7 @@
   "route": "/s/notes",
   "auth": "authenticated",
   "layout": "single",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "icon": "📝",
   "description": "Markdown notes surface with folders, tags, and backlinks.",
   "author": "switchboard",
@@ -28,7 +28,9 @@
     {"method": "POST",   "path": "/notes/move"},
     {"method": "GET",    "path": "/tags"},
     {"method": "GET",    "path": "/tags/*"},
-    {"method": "PUT",    "path": "/tags/*"}
+    {"method": "PUT",    "path": "/tags/*"},
+    {"method": "GET",    "path": "/links/*"},
+    {"method": "GET",    "path": "/backlinks/*"}
   ],
 
   "db_tables": {
@@ -59,6 +61,17 @@
         ["tag"]
       ]
     },
+    "links": {
+      "columns": {
+        "source_id": "text",
+        "target_id": "text",
+        "link_text": "text"
+      },
+      "indexes": [
+        ["source_id"],
+        ["target_id"]
+      ]
+    },
     "folders": {
       "columns": {
         "name":       "text",

packages/notes/script.star

@@ -1,4 +1,4 @@
-# Notes — Starlark Backend (v0.3.0)
+# Notes — Starlark Backend (v0.4.0)
 #
 # Markdown notes surface using ext_data.
 #
@@ -55,6 +55,56 @@ def _tags_for_notes(note_ids):
     return result
 
 
+def _extract_wikilinks(text):
+    """Parse [[...]] patterns from text. Returns deduplicated list of link_text strings."""
+    links = []
+    seen = {}
+    parts = text.split("[[")
+    # parts[0] is before any wikilink; parts[1:] each start after "[["
+    for i in range(1, len(parts)):
+        chunk = parts[i]
+        end = chunk.find("]]")
+        if end > 0:
+            link_text = chunk[:end].strip()
+            lt_lower = link_text.lower()
+            if link_text and lt_lower not in seen:
+                seen[lt_lower] = True
+                links.append(link_text)
+    return links
+
+
+def _sync_links(source_id, body):
+    """Extract wikilinks from body, resolve to note IDs, replace link rows."""
+    raw_links = _extract_wikilinks(_str(body))
+    if not raw_links and not db.query("links", filters={"source_id": source_id}, limit=1):
+        return  # nothing to do
+
+    # resolve titles to note IDs (case-insensitive)
+    all_notes = db.query("notes", filters={"archived": 0}, limit=5000)
+    title_map = {}
+    for n in (all_notes or []):
+        t = _str(n.get("title", "")).lower().strip()
+        if t:
+            title_map[t] = n.get("id", "")
+
+    # delete existing links for this source
+    old_links = db.query("links", filters={"source_id": source_id}, limit=500)
+    for link in (old_links or []):
+        db.delete("links", link["id"])
+
+    # insert new links
+    for lt in raw_links:
+        target_id = title_map.get(lt.lower().strip(), "")
+        # skip self-links
+        if target_id == source_id:
+            target_id = ""
+        db.insert("links", {
+            "source_id": source_id,
+            "target_id": target_id,
+            "link_text": lt,
+        })
+
+
 # ═══════════════════════════════════════════════
 #  Surface API routes (/s/notes/api/*)
 # ═══════════════════════════════════════════════
@@ -83,6 +133,15 @@ def on_request(req):
     if method == "POST" and path == "/notes/move":
         return _move_note(req)
 
+    # ── Link routes ──────────────────────────
+    # GET /links/:note_id — outgoing links
+    if method == "GET" and path.startswith("/links/"):
+        return _get_links(path[len("/links/"):])
+
+    # GET /backlinks/:note_id — incoming links
+    if method == "GET" and path.startswith("/backlinks/"):
+        return _get_backlinks(path[len("/backlinks/"):])
+
     # ── Tag routes ────────────────────────────
     # GET /tags — all unique tags
     if method == "GET" and path == "/tags":
@@ -195,15 +254,17 @@ def _create_note(req):
     if not title:
         title = "Untitled"
 
+    body_text = _str(body.get("body", ""))
     row = db.insert("notes", {
         "title":      title,
-        "body":       _str(body.get("body", "")),
+        "body":       body_text,
         "folder_id":  _str(body.get("folder_id", "")),
         "creator_id": user_id,
         "updated_at": "",
         "pinned":     _int(body.get("pinned", 0)),
         "archived":   0,
     })
+    _sync_links(row["id"], body_text)
     return _resp(201, row)
 
 
@@ -247,6 +308,10 @@ def _update_note(note_id, req):
     if not ok:
         return _resp(500, {"error": "update failed"})
 
+    # sync wikilinks when body changes
+    if "body" in body:
+        _sync_links(note_id, _str(body["body"]))
+
     rows = db.query("notes", filters={"id": note_id}, limit=1)
     return _resp(200, rows[0] if rows else {})
 
@@ -260,6 +325,14 @@ def _delete_note(note_id, req):
         note_tags = db.query("tags", filters={"note_id": note_id}, limit=100)
         for t in (note_tags or []):
             db.delete("tags", t["id"])
+        # cascade-delete outgoing links FROM this note
+        out_links = db.query("links", filters={"source_id": note_id}, limit=500)
+        for link in (out_links or []):
+            db.delete("links", link["id"])
+        # cascade-delete incoming backlinks TO this note
+        in_links = db.query("links", filters={"target_id": note_id}, limit=500)
+        for link in (in_links or []):
+            db.delete("links", link["id"])
         ok = db.delete("notes", note_id)
         if not ok:
             return _resp(404, {"error": "note not found"})
@@ -350,6 +423,46 @@ def _set_note_tags(note_id, req):
     return _resp(200, {"data": clean_tags})
 
 
+# ═══════════════════════════════════════════════
+#  Links (backlinks + wikilinks)
+# ═══════════════════════════════════════════════
+
+def _get_links(note_id):
+    """Return outgoing links for a note."""
+    rows = db.query("links", filters={"source_id": note_id}, limit=500)
+    items = []
+    for r in (rows or []):
+        items.append({
+            "source_id":  r.get("source_id", ""),
+            "target_id":  r.get("target_id", ""),
+            "link_text":  r.get("link_text", ""),
+        })
+    return _resp(200, {"data": items})
+
+
+def _get_backlinks(note_id):
+    """Return notes that link TO this note (backlinks), enriched with source titles."""
+    rows = db.query("links", filters={"target_id": note_id}, limit=500)
+    if not rows:
+        return _resp(200, {"data": []})
+
+    # batch-fetch source note titles
+    all_notes = db.query("notes", filters={"archived": 0}, limit=5000)
+    note_map = {}
+    for n in (all_notes or []):
+        note_map[n.get("id", "")] = n.get("title", "Untitled")
+
+    items = []
+    for r in rows:
+        sid = r.get("source_id", "")
+        items.append({
+            "source_id":    sid,
+            "source_title": note_map.get(sid, "Unknown"),
+            "link_text":    r.get("link_text", ""),
+        })
+    return _resp(200, {"data": items})
+
+
 # ═══════════════════════════════════════════════
 #  Folder CRUD
 # ═══════════════════════════════════════════════
@@ -506,4 +619,8 @@ def _get_stats():
             tag_seen[tag] = True
     tag_count = len(tag_seen)
 
-    return _resp(200, {"total": total, "pinned": pinned, "archived": archived, "unfiled": unfiled, "folders": folder_count, "tags": tag_count})
+    # count links
+    all_links = db.query("links", limit=10000)
+    link_count = len(all_links or [])
+
+    return _resp(200, {"total": total, "pinned": pinned, "archived": archived, "unfiled": unfiled, "folders": folder_count, "tags": tag_count, "links": link_count})