add tags

Trip-level tags: admins configure available tags in the trip header (inline add/remove pills). The AI can also create new tags via the add_tag tool.
Event tags: selectable in the Add Event modal, shown as colored pills on event cards in the timeline, and on AI suggestion cards.
AI integration: sees available tags in its system prompt, applies them when proposing events, can create new ones with add_tag.
Discord: tags shown as inline code blocks under each event in /trip view.
Colors: auto-assigned from an 8-color palette by tag index, consistent everywhere.

drb-c2-core/app/models.py

@@ -146,6 +146,7 @@ class TripCreate(BaseModel):
     maps_link: Optional[str] = None
     start_date: str  # YYYY-MM-DD
     end_date: str    # YYYY-MM-DD
+    available_tags: List[str] = []      # tag labels configured for this trip
 
 
 class TripEventCreate(BaseModel):
@@ -157,6 +158,7 @@ class TripEventCreate(BaseModel):
     maps_link: Optional[str] = None
     place_id: Optional[str] = None      # Google Place ID
     notes: Optional[str] = None
+    tags: List[str] = []                # tag labels applied to this event
 
 
 class AttendeeAction(BaseModel):

drb-c2-core/app/routers/trips.py

@@ -47,6 +47,26 @@ _TOOLS = [
             },
         },
     },
+    {
+        "type": "function",
+        "function": {
+            "name": "add_tag",
+            "description": (
+                "Add a new tag to the trip's available tag list so it can be used on events. "
+                "Use this when you want to apply a tag that doesn't exist yet."
+            ),
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "tag": {
+                        "type": "string",
+                        "description": "Short tag label, e.g. 'must-do', 'nightlife', 'food'",
+                    },
+                },
+                "required": ["tag"],
+            },
+        },
+    },
     {
         "type": "function",
         "function": {
@@ -66,6 +86,7 @@ _TOOLS = [
                     "location":   {"type": "string", "description": "Full address or place name"},
                     "maps_link":  {"type": "string", "description": "Google Maps URL"},
                     "notes":      {"type": "string", "description": "Brief tips or reasoning"},
+                    "tags":       {"type": "array", "items": {"type": "string"}, "description": "Tags to apply — must be from the trip's available tags list"},
                 },
                 "required": ["title"],
             },
@@ -133,13 +154,15 @@ def _build_system_prompt(trip: dict, events: list[dict]) -> str:
 
     itinerary = "".join(lines) if lines else "\n  (no events yet)"
     attendees = ", ".join(trip.get("attendees", {}).values()) or "not specified"
+    available_tags = trip.get("available_tags") or []
+    tags_section = f"\nAvailable tags: {', '.join(available_tags)}" if available_tags else ""
 
     return f"""You are a trip planning assistant for the following trip.
 
 Trip: {trip["name"]}
 Destination: {trip["location"]}
 Dates: {trip["start_date"]} to {trip["end_date"]}
-Attendees: {attendees}
+Attendees: {attendees}{tags_section}
 
 Current itinerary:{itinerary}
 
@@ -148,6 +171,7 @@ Guidelines:
 - Format all responses using Markdown: use **bold** for place names and key details, bullet lists for options, and [links](url) for Maps links.
 - When the user mentions places, activities, or asks for suggestions, search for them with search_places before proposing.
 - Use propose_event for each concrete suggestion — one call per event. The user will approve or skip each one.
+- When proposing events, apply relevant tags from the available tags list if any are defined.
 - Be mindful of the existing schedule when assigning times. Avoid obvious conflicts.
 - All proposed dates must fall between {trip["start_date"]} and {trip["end_date"]}.
 - If the user says something like "everyone should be there by 6", factor that into your time proposals.
@@ -183,6 +207,7 @@ async def create_trip(body: TripCreate):
         "start_date": body.start_date,
         "end_date": body.end_date,
         "attendees": {},  # {discord_user_id: discord_username}
+        "available_tags": body.available_tags,
         "created_at": now,
     }
     await fstore.doc_set("trips", trip_id, doc, merge=False)
@@ -199,6 +224,17 @@ async def get_trip(trip_id: str):
     return {**trip, "events": events}
 
 
+@router.put("/{trip_id}/tags")
+async def update_trip_tags(trip_id: str, body: dict):
+    """Replace the trip's available tag list."""
+    trip = await fstore.doc_get("trips", trip_id)
+    if not trip:
+        raise HTTPException(404, f"Trip '{trip_id}' not found.")
+    tags = [str(t) for t in body.get("available_tags", []) if t]
+    await fstore.doc_update("trips", trip_id, {"available_tags": tags})
+    return {"available_tags": tags}
+
+
 @router.delete("/{trip_id}")
 async def delete_trip(trip_id: str, _: dict = Depends(require_service_key_or_admin)):
     trip = await fstore.doc_get("trips", trip_id)
@@ -275,6 +311,7 @@ async def create_event(trip_id: str, body: TripEventCreate):
         "maps_link": body.maps_link,
         "place_id": body.place_id,
         "notes": body.notes,
+        "tags": body.tags,
         "attendees": {},
         "created_at": now,
     }
@@ -403,7 +440,19 @@ async def trip_chat(
         for tc in msg.tool_calls:
             args = json.loads(tc.function.arguments)
 
-            if tc.function.name == "search_places":
+            if tc.function.name == "add_tag":
+                new_tag = str(args.get("tag", "")).strip()[:50]
+                if new_tag and new_tag not in trip.get("available_tags", []):
+                    updated_tags = list(trip.get("available_tags") or []) + [new_tag]
+                    trip["available_tags"] = updated_tags
+                    await fstore.doc_update("trips", trip_id, {"available_tags": updated_tags})
+                messages.append({
+                    "role": "tool",
+                    "tool_call_id": tc.id,
+                    "content": json.dumps({"available_tags": trip.get("available_tags", [])}),
+                })
+
+            elif tc.function.name == "search_places":
                 # Limit query string lengths before hitting the Maps API
                 query = str(args.get("query", ""))[:200]
                 near = str(args.get("near", ""))[:200]
@@ -416,8 +465,10 @@ async def trip_chat(
 
             elif tc.function.name == "propose_event":
                 suggestion = {k: args.get(k) for k in (
-                    "title", "date", "start_time", "end_time", "location", "maps_link", "notes"
+                    "title", "date", "start_time", "end_time", "location", "maps_link", "notes", "tags"
                 )}
+                if not isinstance(suggestion.get("tags"), list):
+                    suggestion["tags"] = []
                 suggestions.append(suggestion)
                 messages.append({
                     "role": "tool",

drb-frontend/app/trips/[id]/page.tsx

@@ -58,6 +58,34 @@ function dateRange(start: string, end: string): string[] {
   return dates;
 }
 
+// ---------------------------------------------------------------------------
+// Tag helpers
+// ---------------------------------------------------------------------------
+
+const TAG_PALETTE = [
+  "bg-violet-900/60 text-violet-300 border-violet-700/50",
+  "bg-sky-900/60 text-sky-300 border-sky-700/50",
+  "bg-emerald-900/60 text-emerald-300 border-emerald-700/50",
+  "bg-amber-900/60 text-amber-300 border-amber-700/50",
+  "bg-rose-900/60 text-rose-300 border-rose-700/50",
+  "bg-fuchsia-900/60 text-fuchsia-300 border-fuchsia-700/50",
+  "bg-cyan-900/60 text-cyan-300 border-cyan-700/50",
+  "bg-orange-900/60 text-orange-300 border-orange-700/50",
+];
+
+function tagColor(tag: string, availableTags: string[]): string {
+  const idx = availableTags.indexOf(tag);
+  return TAG_PALETTE[(idx >= 0 ? idx : 0) % TAG_PALETTE.length];
+}
+
+function TagPill({ tag, availableTags }: { tag: string; availableTags: string[] }) {
+  return (
+    <span className={`inline-block text-[10px] font-medium rounded-full px-2 py-0.5 border ${tagColor(tag, availableTags)}`}>
+      {tag}
+    </span>
+  );
+}
+
 function detectConflicts(events: TripEvent[]): Set<string> {
   const timed = events.filter((e) => e.start_time);
   const conflicts = new Set<string>();
@@ -158,6 +186,7 @@ function AddEventModal({
   onAdd: (body: object) => Promise<void>;
   prefill?: Partial<TripEvent>;
 }) {
+  const availableTags = trip.available_tags ?? [];
   const [title,     setTitle]     = useState(prefill?.title ?? "");
   const [date,      setDate]      = useState(prefill?.date ?? trip.start_date);
   const [startTime, setStartTime] = useState(prefill?.start_time ?? "");
@@ -166,6 +195,7 @@ function AddEventModal({
   const [mapsLink,  setMapsLink]  = useState(prefill?.maps_link ?? "");
   const [placeId,   setPlaceId]   = useState(prefill?.place_id ?? "");
   const [notes,     setNotes]     = useState(prefill?.notes ?? "");
+  const [tags,      setTags]      = useState<string[]>(prefill?.tags ?? []);
   const [saving,    setSaving]    = useState(false);
   const [error,     setError]     = useState<string | null>(null);
 
@@ -190,6 +220,7 @@ function AddEventModal({
         maps_link:  mapsLink || null,
         place_id:   placeId || null,
         notes:      notes || null,
+        tags,
       });
       onClose();
     } catch {
@@ -277,6 +308,29 @@ function AddEventModal({
           />
         </div>
 
+        {availableTags.length > 0 && (
+          <div>
+            <label className="text-xs text-gray-400 block mb-1">Tags</label>
+            <div className="flex flex-wrap gap-1.5">
+              {availableTags.map((tag) => {
+                const active = tags.includes(tag);
+                return (
+                  <button
+                    key={tag}
+                    type="button"
+                    onClick={() => setTags((prev) => active ? prev.filter((t) => t !== tag) : [...prev, tag])}
+                    className={`text-xs rounded-full px-2.5 py-1 border transition-colors ${
+                      active ? tagColor(tag, availableTags) : "bg-gray-800 text-gray-500 border-gray-700 hover:border-gray-600 hover:text-gray-400"
+                    }`}
+                  >
+                    {tag}
+                  </button>
+                );
+              })}
+            </div>
+          </div>
+        )}
+
         {error && <p className="text-red-400 text-xs">{error}</p>}
 
         <div className="flex gap-3 justify-end pt-1">
@@ -306,11 +360,13 @@ function DayTimeline({
   isAdmin,
   onDelete,
   driveSegments,
+  availableTags,
 }: {
   events: TripEvent[];
   isAdmin: boolean;
   onDelete: (id: string) => void;
   driveSegments: { fromId: string; toId: string; text: string }[];
+  availableTags: string[];
 }) {
   const timed = [...events.filter((e) => e.start_time)].sort(
     (a, b) => toMin(a.start_time!) - toMin(b.start_time!)
@@ -397,6 +453,11 @@ function DayTimeline({
                       {height >= 60 && e.notes && (
                         <p className="text-gray-600 text-xs mt-0.5 italic truncate">{e.notes}</p>
                       )}
+                      {e.tags?.length > 0 && (
+                        <div className="flex flex-wrap gap-1 mt-1">
+                          {e.tags.map((t) => <TagPill key={t} tag={t} availableTags={availableTags} />)}
+                        </div>
+                      )}
                     </div>
                     <div className="flex items-center gap-1 shrink-0">
                       {e.maps_link && (
@@ -451,6 +512,11 @@ function DayTimeline({
                   <p className="text-gray-500 text-xs mt-0.5">{e.location}</p>
                 )}
                 {e.notes && <p className="text-gray-600 text-xs italic mt-0.5">{e.notes}</p>}
+                {e.tags?.length > 0 && (
+                  <div className="flex flex-wrap gap-1 mt-1">
+                    {e.tags.map((t) => <TagPill key={t} tag={t} availableTags={availableTags} />)}
+                  </div>
+                )}
               </div>
               <div className="flex items-center gap-2 shrink-0">
                 {e.maps_link && (
@@ -493,6 +559,7 @@ interface SuggestionCard {
   location?: string;
   maps_link?: string;
   notes?: string;
+  tags?: string[];
   dismissed?: boolean;
   added?: boolean;
 }
@@ -567,6 +634,7 @@ function AssistantPanel({
         location:   s.location ?? null,
         maps_link:  s.maps_link ?? null,
         notes:      s.notes ?? null,
+        tags:       s.tags ?? [],
       });
       onAddEvent(event);
       setMessages((prev) =>
@@ -672,6 +740,11 @@ function AssistantPanel({
                     )}
                     {s.location && <p className="truncate">{s.location}</p>}
                     {s.notes && <p className="text-gray-500 italic">{s.notes}</p>}
+                    {s.tags && s.tags.length > 0 && (
+                      <div className="flex flex-wrap gap-1 pt-0.5">
+                        {s.tags.map((t) => <TagPill key={t} tag={t} availableTags={trip.available_tags ?? []} />)}
+                      </div>
+                    )}
                   </div>
                   {s.maps_link && (
                     <a href={s.maps_link} target="_blank" rel="noopener noreferrer"
@@ -755,6 +828,7 @@ export default function TripDetailPage() {
   const [selectedDay, setSelectedDay] = useState<string>("");
   const [showAdd,     setShowAdd]     = useState(false);
   const [driveTimes,  setDriveTimes]  = useState<Record<string, { fromId: string; toId: string; text: string }[]>>({});
+  const [tagInput,    setTagInput]    = useState("");
 
   const load = useCallback(async () => {
     try {
@@ -836,6 +910,25 @@ export default function TripDetailPage() {
       );
       return { ...prev, events };
     });
+    // Refresh trip to pick up any new tags the AI may have created
+    c2api.getTrip(id).then((data) => setTrip((prev) => prev ? { ...prev, available_tags: (data as FullTrip).available_tags } : prev)).catch(() => {});
+  }
+
+  async function handleAddTag() {
+    if (!trip || !tagInput.trim()) return;
+    const tag = tagInput.trim();
+    if (trip.available_tags?.includes(tag)) { setTagInput(""); return; }
+    const updated = [...(trip.available_tags ?? []), tag];
+    await c2api.updateTripTags(trip.trip_id, updated);
+    setTrip((prev) => prev ? { ...prev, available_tags: updated } : prev);
+    setTagInput("");
+  }
+
+  async function handleRemoveTag(tag: string) {
+    if (!trip) return;
+    const updated = (trip.available_tags ?? []).filter((t) => t !== tag);
+    await c2api.updateTripTags(trip.trip_id, updated);
+    setTrip((prev) => prev ? { ...prev, available_tags: updated } : prev);
   }
 
   if (loading) return <p className="text-gray-500 text-sm font-mono">Loading…</p>;
@@ -899,6 +992,32 @@ export default function TripDetailPage() {
             )}
           </div>
         </div>
+
+        {/* Tag manager */}
+        {(isAdmin || (trip.available_tags ?? []).length > 0) && (
+          <div className="flex flex-wrap items-center gap-2">
+            {(trip.available_tags ?? []).map((tag) => (
+              <span key={tag} className={`inline-flex items-center gap-1 text-xs rounded-full px-2.5 py-0.5 border ${tagColor(tag, trip.available_tags ?? [])}`}>
+                {tag}
+                {isAdmin && (
+                  <button onClick={() => handleRemoveTag(tag)} className="hover:text-white transition-colors leading-none">×</button>
+                )}
+              </span>
+            ))}
+            {isAdmin && (
+              <div className="flex items-center gap-1">
+                <input
+                  value={tagInput}
+                  onChange={(e) => setTagInput(e.target.value)}
+                  onKeyDown={(e) => e.key === "Enter" && (e.preventDefault(), handleAddTag())}
+                  placeholder="Add tag…"
+                  className="bg-transparent border border-gray-700 rounded-full px-2.5 py-0.5 text-xs text-gray-400 placeholder-gray-600 focus:outline-none focus:border-gray-500 w-24"
+                />
+                <button onClick={handleAddTag} className="text-xs text-gray-500 hover:text-gray-300 transition-colors">+</button>
+              </div>
+            )}
+          </div>
+        )}
       </div>
 
       {/* Two-column layout */}
@@ -946,6 +1065,7 @@ export default function TripDetailPage() {
               isAdmin={isAdmin}
               onDelete={handleDeleteEvent}
               driveSegments={driveTimes[selectedDay] ?? []}
+              availableTags={trip.available_tags ?? []}
             />
           </div>
         </div>

drb-frontend/lib/c2api.ts

@@ -142,6 +142,8 @@ export const c2api = {
     request<import("@/lib/types").TripRecord>("/trips", { method: "POST", body: JSON.stringify(body) }),
   deleteTrip: (id: string) =>
     request(`/trips/${id}`, { method: "DELETE" }),
+  updateTripTags: (id: string, available_tags: string[]) =>
+    request<{ available_tags: string[] }>(`/trips/${id}/tags`, { method: "PUT", body: JSON.stringify({ available_tags }) }),
   createTripEvent: (tripId: string, body: object) =>
     request<import("@/lib/types").TripEvent>(`/trips/${tripId}/events`, { method: "POST", body: JSON.stringify(body) }),
   deleteTripEvent: (tripId: string, eventId: string) =>

drb-frontend/lib/types.ts

@@ -110,6 +110,7 @@ export interface TripEvent {
   maps_link: string | null;
   place_id: string | null;
   notes: string | null;
+  tags: string[];
   attendees: Record<string, string>;
   created_at: string;
 }
@@ -132,6 +133,7 @@ export interface TripRecord {
   start_date: string;
   end_date: string;
   attendees: Record<string, string>;
+  available_tags: string[];
   created_at: string;
   events?: TripEvent[];
 }

drb-server-discord-bot/app/commands/trips.py

@@ -248,6 +248,10 @@ class TripCommands(commands.Cog):
                 if e.get("notes"):
                     line += f"\n\u3000\u3000_{e['notes']}_"
 
+                event_tags = e.get("tags") or []
+                if event_tags:
+                    line += f"\n\u3000\u3000`{'` `'.join(event_tags)}`"
+
                 event_att = list(e.get("attendees", {}).values())
                 if event_att:
                     line += f"\n\u3000\u3000{', '.join(event_att)}"