Allow keeping selected calendar pieces/days and regenerating the rest.

Agency can mark good stories, keep only those days, or request a partial v2 for unmarked slots without replacing the whole month.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/lib/calendar-generate.ts

@@ -35,6 +35,8 @@ export type GeneratePreviewInput = {
   brandbook?: Brandbook | null;
   /** Publicaciones reales (pipeline / IG) además del histórico de calendarios. */
   publishedPosts?: PublishedNetworkPost[];
+  /** Títulos / hooks a no repetir (piezas que el usuario conserva). */
+  avoidTitles?: string[];
 };
 
 export type GeneratePreviewResult = {
@@ -88,6 +90,7 @@ async function anthropicStrategist(
     label: input.label,
     dna,
     trends,
+    avoidTitles: input.avoidTitles || [],
   });
 
   try {
@@ -216,4 +219,83 @@ export function mergePreviewIntoPlan(
   };
 }
 
+/**
+ * Conserva piezas marcadas y sustituye el resto con un preview nuevo
+ * (prioriza mismo día; si faltan, rellena con otras del preview).
+ */
+export function mergeKeepAndRegenerate(
+  existing: RrssMonthPlan,
+  preview: RrssMonthPlan,
+  keepIds: Iterable<string>
+): RrssMonthPlan {
+  const keep = new Set(keepIds);
+  const kept = (existing.pieces || []).filter((p) => keep.has(p.id));
+  const keptDates = new Set(kept.map((p) => p.date.slice(0, 10)));
+
+  const needByDate = new Map<string, number>();
+  for (const p of existing.pieces || []) {
+    if (keep.has(p.id)) continue;
+    const d = p.date.slice(0, 10);
+    needByDate.set(d, (needByDate.get(d) || 0) + 1);
+  }
+
+  const usedPreview = new Set<string>();
+  const replacements: RrssPiece[] = [];
+
+  const takeFromPreview = (preferDate: string | null, n: number): RrssPiece[] => {
+    const pool = (preview.pieces || []).filter((p) => !usedPreview.has(p.id));
+    const same = preferDate
+      ? pool.filter((p) => p.date.slice(0, 10) === preferDate)
+      : [];
+    const rest = pool.filter((p) => p.date.slice(0, 10) !== preferDate);
+    const picked = [...same, ...rest].slice(0, n);
+    for (const p of picked) usedPreview.add(p.id);
+    return picked;
+  };
+
+  for (const [date, n] of needByDate) {
+    const picked = takeFromPreview(date, n);
+    picked.forEach((p, i) => {
+      replacements.push({
+        ...p,
+        id: newPieceId(date, `${p.title}-${i}`),
+        date,
+      });
+    });
+  }
+
+  return {
+    ...existing,
+    pieces: [...kept, ...replacements].sort((a, b) =>
+      a.date.localeCompare(b.date)
+    ),
+    hero: {
+      ...existing.hero,
+      ...(preview.hero || {}),
+      chips: [
+        `${kept.length} conservadas`,
+        `${replacements.length} regeneradas`,
+        ...(preview.hero?.chips || []).slice(0, 2),
+      ],
+    },
+  };
+}
+
+/** Deja solo las piezas/días marcados. */
+export function keepOnlyPieces(
+  existing: RrssMonthPlan,
+  keepIds: Iterable<string>
+): RrssMonthPlan {
+  const keep = new Set(keepIds);
+  const pieces = (existing.pieces || []).filter((p) => keep.has(p.id));
+  return {
+    ...existing,
+    pieces,
+    hero: {
+      ...existing.hero,
+      chips: [`${pieces.length} piezas`, 'selección manual'],
+    },
+  };
+}
+
 export { monthLabel };

src/lib/calendar-strategy.ts

@@ -860,6 +860,7 @@ export function strategistSystemPrompt(input: {
   label: string;
   dna: ClientDna;
   trends: TrendBeat[];
+  avoidTitles?: string[];
 }): string {
   const netBlock =
     input.dna.networkSamples.length > 0
@@ -867,6 +868,13 @@ export function strategistSystemPrompt(input: {
           .map((s) => `- ${s}`)
           .join('\n')}\n`
       : '';
+  const avoid = (input.avoidTitles || []).filter(Boolean).slice(0, 40);
+  const avoidBlock =
+    avoid.length > 0
+      ? `\nPIEZAS QUE EL CLIENTE YA CONSERVA (no repitas estos títulos ni el mismo ángulo):\n${avoid
+          .map((t) => `- ${t}`)
+          .join('\n')}\n`
+      : '';
   return `Eres Head of Social de 4Ventures. Crea un calendario NUEVO para ${input.label} (${input.ym}).
 NO copies títulos viejos ni captiones publicadas. Usa como constraint creativo:
 1) Zona de marca / brandbook
@@ -876,7 +884,7 @@ ADN series: ${input.dna.signatureSeries.join(', ')}.
 Voz: ${input.dna.brand.tone}. Vertical: ${input.dna.brand.vertical}.
 Volumen guía: ~${input.dna.avgPerWeek} piezas/semana · Stories ratio hist. ${(input.dna.storiesRatio * 100).toFixed(0)}%.
 ${input.dna.brandbookPrompt ? `\nBRANDBOOK:\n${input.dna.brandbookPrompt}\n` : ''}
-${netBlock}
+${netBlock}${avoidBlock}
 Playbook 2026 ES: ${PLAYBOOK_2026.principle}
 Tendencias del mes:
 ${input.trends.map((t) => `- ${t.label}: ${t.why}`).join('\n')}