diff --git a/alembic/versions/085_atom_clip_caption_embedding.py b/alembic/versions/085_atom_clip_caption_embedding.py
new file mode 100644
index 000000000..f3348d565
--- /dev/null
+++ b/alembic/versions/085_atom_clip_caption_embedding.py
@@ -0,0 +1,33 @@
+"""asset_atom_clips 新增 caption/embedding 字段（#2035 语义标签增强）
+
+Revision ID: 085_atom_clip_caption_embedding
+Revises: 084_lipsync_jobs_style
+Create Date: 2026-09-25
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "085_atom_clip_caption_embedding"
+down_revision = "084_lipsync_jobs_style"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # caption: 中文画面描述（10-30字）
+    op.add_column(
+        "asset_atom_clips",
+        sa.Column("caption", sa.Text(), nullable=True),
+    )
+    # embedding: caption 对应的向量（豆包 embedding 接口返回，JSON 存 float 数组）
+    op.add_column(
+        "asset_atom_clips",
+        sa.Column("embedding", sa.JSON(), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("asset_atom_clips", "embedding")
+    op.drop_column("asset_atom_clips", "caption")
diff --git a/apps/api/app/api/routes/generation_tasks.py b/apps/api/app/api/routes/generation_tasks.py
index efe8679c8..ab295f591 100755
--- a/apps/api/app/api/routes/generation_tasks.py
+++ b/apps/api/app/api/routes/generation_tasks.py
@@ -134,10 +134,11 @@ def _ensure_library_has_ready_video_assets(assets) -> None:
 def _select_assets_from_library(
     assets: list,
     mode: str,
-    count: int,
+    count: int = 0,
     rng=None,
     script_tags: list | None = None,
     tag_names_by_id: dict | None = None,
+    db=None,
 ) -> list[str]:
     """根据选取模式从素材库中选取 ready 状态的视频素材 ID。
 
@@ -158,6 +159,42 @@ def _select_assets_from_library(
     if not ready_video_assets:
         return []
 
+    # #2035：加载片段级 AI 标签，供叙事模式 AI 加权和 smart 模式语义匹配使用。
+    # 失败降级为空（不影响选片主流程）。
+    clip_ai_tags_by_asset: dict[str, list[dict]] = {}
+    ai_tags_by_asset: dict[str, dict] = {}  # asset_id → 聚合后的 ai_tags dict（取首个有 has_text 的片段；合并 scene/objects/action 去重）
+    try:
+        if db is not None:
+            from packages.adapters.sqlalchemy_impl.models import AssetAtomClipModel
+            ready_ids = [a.id for a in ready_video_assets]
+            clip_rows = (
+                db.query(AssetAtomClipModel.asset_id, AssetAtomClipModel.ai_tags)
+                .filter(AssetAtomClipModel.asset_id.in_(ready_ids))
+                .filter(AssetAtomClipModel.ai_tags.isnot(None))
+                .all()
+            )
+            agg: dict[str, dict] = {}
+            for asset_id, ai_tags in clip_rows:
+                if not isinstance(ai_tags, dict):
+                    continue
+                clip_ai_tags_by_asset.setdefault(asset_id, []).append(ai_tags)
+                # 聚合：合并 scene/objects/action 去重
+                agg.setdefault(asset_id, {"scene": [], "objects": [], "action": [], "shot": "", "has_text": False})
+                for key in ("scene", "objects", "action"):
+                    for v in ai_tags.get(key) or []:
+                        v = str(v).strip()
+                        if v and v not in agg[asset_id][key]:
+                            agg[asset_id][key].append(v)
+                if ai_tags.get("has_text") is True:
+                    agg[asset_id]["has_text"] = True
+                if not agg[asset_id]["shot"] and ai_tags.get("shot"):
+                    agg[asset_id]["shot"] = ai_tags["shot"]
+            ai_tags_by_asset = agg
+    except Exception:  # noqa: BLE001
+        logger.warning("[选片] 加载片段 AI 标签失败，降级不使用语义匹配", exc_info=True)
+        clip_ai_tags_by_asset = {}
+        ai_tags_by_asset = {}
+
     # 叙事模式（#1970 PR3）：文案标签命中池优先；无任何命中时完全降级为现有随机逻辑。
     if script_tags:
         from packages.domain.narrative_match import pick_narrative_assets
@@ -167,6 +204,7 @@ def _select_assets_from_library(
             ready_video_assets,
             script_tags=script_tags,
             tag_names_by_id=tag_names_by_id,
+            clip_ai_tags_by_asset=clip_ai_tags_by_asset,
             limit=limit,
             rng=rng,
         )
@@ -177,7 +215,16 @@ def _select_assets_from_library(
         # 评分维度：质量分(40%) + 时长适配(30%) + 新鲜度(20%) + 未使用加分(10%)
         # 排序注入随机噪声（#1743）：同分素材每次选出不同组合，从素材组合层面降重
         limit = count if count > 0 else None
-        results = smart_select_assets(ready_video_assets, limit=limit, kind="video", rng=rng)
+        # #2035：给 smart_select_assets 传入文案标签和 AI 标签映射，启用语义维度
+        norm_script = {t.strip().lower() for t in (script_tags or []) if t and t.strip()}
+        results = smart_select_assets(
+            ready_video_assets,
+            limit=limit,
+            kind="video",
+            rng=rng,
+            script_tags=norm_script if norm_script else None,
+            ai_tags_by_asset=ai_tags_by_asset or None,
+        )
         return [r.asset.id for r in results]
 
     # 默认 all 模式：返回全部 ready 视频素材
@@ -396,6 +443,7 @@ def create_generation_task(
                 count=request.asset_select_count,
                 script_tags=narrative_script_tags or None,
                 tag_names_by_id=_tag_index,
+                db=db,
             )
     elif project_id and not resolved_asset_ids and (request.asset_select_mode in ("smart",) or narrative_script_tags):
         # 项目级模式：未指定 asset_ids 且选择了 smart 模式（或叙事模式按标签匹配）时自动选取
@@ -410,6 +458,7 @@ def create_generation_task(
                 count=request.asset_select_count,
                 script_tags=narrative_script_tags or None,
                 tag_names_by_id=_tag_index,
+                db=db,
             )
             if not resolved_asset_ids:
                 raise HTTPException(
diff --git a/apps/worker/worker_app/celery_app.py b/apps/worker/worker_app/celery_app.py
index c3c2eb2bb..85fab34b6 100755
--- a/apps/worker/worker_app/celery_app.py
+++ b/apps/worker/worker_app/celery_app.py
@@ -31,6 +31,7 @@ celery_app.conf.imports = (
     # #1970 片段级 AI 标签：必须显式 import 注册，否则 worker 报
     # "Received unregistered task of type 'worker.tag_atom_clip'"
     "worker_app.tasks.atom_clip_tagging",
+    "worker_app.tasks.asset_quality_scoring_task",
     "worker_app.tasks.backfill_atom_clip_tags",
     "worker_app.tasks.classification",
     "worker_app.tasks.generation",
diff --git a/apps/worker/worker_app/tasks/asset_analyzer.py b/apps/worker/worker_app/tasks/asset_analyzer.py
index 949d59819..952fab835 100755
--- a/apps/worker/worker_app/tasks/asset_analyzer.py
+++ b/apps/worker/worker_app/tasks/asset_analyzer.py
@@ -446,21 +446,3 @@ def classify_asset_real(video_path: str) -> tuple[str, float]:
         logger.warning(f"Classification failed, using fallback: {e}")
         return AssetClassification.OTHER.value, 0.3
 
-
-def calculate_quality_score_real(video_path: str) -> float:
-    """
-    质量评分入口函数
-
-    Args:
-        video_path: 视频文件路径
-
-    Returns:
-        质量评分 (0-100)
-    """
-    try:
-        analyzer = AssetAnalyzer(video_path)
-        result = analyzer.calculate_quality_score()
-        return result.total
-    except Exception as e:
-        logger.warning(f"Quality scoring failed, using fallback: {e}")
-        return 50.0
diff --git a/apps/worker/worker_app/tasks/asset_quality_scoring_task.py b/apps/worker/worker_app/tasks/asset_quality_scoring_task.py
new file mode 100644
index 000000000..7a15b4ca3
--- /dev/null
+++ b/apps/worker/worker_app/tasks/asset_quality_scoring_task.py
@@ -0,0 +1,92 @@
+"""素材质量评分 Celery 任务 — #2035.
+
+视频素材 READY 入库后异步触发：下载视频到临时文件，运行 FFmpeg+NumPy 质量分析，
+将 0-100 总分写入 assets.quality_score 字段。失败不阻断主流程（保留 NULL 或旧值，
+选片时按 50 分兜底）。
+
+任务名：worker.calculate_asset_quality
+"""
+
+from __future__ import annotations
+
+import os
+import tempfile
+from pathlib import Path
+
+from celery.utils.log import get_task_logger
+from worker_app.celery_app import celery_app
+from worker_app.db import SessionLocal
+
+from packages.adapters.sqlalchemy_impl.asset_repository import SQLAlchemyAssetRepository
+from packages.shared.storage import get_shared_storage_service
+
+logger = get_task_logger(__name__)
+
+
+@celery_app.task(name="worker.calculate_asset_quality", bind=True, max_retries=1, default_retry_delay=15)
+def calculate_asset_quality_task(self, asset_id: str) -> dict:
+    """为单个视频素材计算质量评分并写回 assets.quality_score。
+
+    流程：
+    1. 下载视频到临时文件；
+    2. 用 AssetAnalyzer(FFmpeg+NumPy) 提取分辨率/帧率/码率/清晰度/稳定性 5 维分数；
+    3. 写回 assets.quality_score。
+
+    失败/非视频/无文件等情况均静默降级，返回 status=skipped/failed 不抛异常。
+    """
+    db = SessionLocal()
+    tmp_dir = tempfile.mkdtemp(prefix="quality_score_")
+    try:
+        asset_repo = SQLAlchemyAssetRepository(db)
+        asset = asset_repo.find_by_id(asset_id)
+        if asset is None:
+            return {"status": "skipped", "reason": "asset not found", "asset_id": asset_id}
+        if not (getattr(asset, "mime_type", "") or "").startswith("video/"):
+            return {"status": "skipped", "reason": "not a video", "asset_id": asset_id}
+        # 已有质量分则幂等跳过（重新计算需显式置空）
+        if getattr(asset, "quality_score", None) is not None:
+            return {"status": "skipped", "reason": "already scored", "asset_id": asset_id}
+
+        storage = get_shared_storage_service()
+        storage_key = getattr(asset, "storage_key", "") or ""
+        if not storage_key:
+            return {"status": "skipped", "reason": "no storage_key", "asset_id": asset_id}
+
+        # 下载到临时文件
+        safe_suffix = ".mp4"
+        local_path = Path(tmp_dir) / f"asset_{asset_id[:8]}{safe_suffix}"
+        ok = storage.download_asset(storage_key, local_path)
+        if not ok or not local_path.exists() or local_path.stat().st_size == 0:
+            return {"status": "failed", "reason": "download failed", "asset_id": asset_id}
+
+        # 调用 AssetAnalyzer
+        from worker_app.tasks.asset_analyzer import AssetAnalyzer
+        try:
+            analyzer = AssetAnalyzer(str(local_path), temp_dir=tmp_dir)
+            result = analyzer.calculate_quality_score()
+            total = float(result.total) if result and 0 <= result.total <= 100 else 50.0
+        except Exception as analyze_err:  # noqa: BLE001
+            logger.warning("[quality_score] 分析失败，使用默认50分: asset=%s err=%s", asset_id, analyze_err)
+            total = 50.0
+
+        # 写回数据库
+        asset.quality_score = total
+        asset_repo.update(asset)
+        db.commit()
+
+        logger.info("[quality_score] asset=%s score=%.1f", asset_id, total)
+        return {"status": "completed", "asset_id": asset_id, "quality_score": total}
+    except Exception as exc:  # noqa: BLE001
+        db.rollback()
+        logger.exception("[quality_score] asset=%s 失败: %s", asset_id, exc)
+        if self.request.retries < self.max_retries:
+            raise self.retry(exc=exc) from None
+        return {"status": "failed", "asset_id": asset_id, "error": str(exc)}
+    finally:
+        db.close()
+        # 清理临时文件
+        try:
+            import shutil
+            shutil.rmtree(tmp_dir, ignore_errors=True)
+        except Exception:
+            pass
diff --git a/apps/worker/worker_app/tasks/atom_clip_tagging.py b/apps/worker/worker_app/tasks/atom_clip_tagging.py
index f3dc24ca0..2a6b89d38 100644
--- a/apps/worker/worker_app/tasks/atom_clip_tagging.py
+++ b/apps/worker/worker_app/tasks/atom_clip_tagging.py
@@ -78,14 +78,18 @@ def tag_atom_clip_task(self, atom_clip_id: str, force: bool = False) -> dict:
         atom_repo.update_ai_tags(atom_clip_id, ai_tags)
 
         logger.info(
-            "[atom_clip_tagging] clip_id=%s ai_tags=%s",
+            "[atom_clip_tagging] clip_id=%s ai_tags=%s caption=%r has_embedding=%s",
             atom_clip_id,
             {k: v for k, v in ai_tags.items() if k != "inherited_tags"},
+            caption,
+            bool(embedding),
         )
         return {
             "status": "completed",
             "clip_id": atom_clip_id,
             "has_ai_tags": any(v for k, v in ai_tags.items() if k != "inherited_tags" and v),
+            "caption": caption,
+            "embedding_dim": len(embedding) if embedding else 0,
         }
     except Exception as exc:
         db.rollback()
diff --git a/apps/worker/worker_app/tasks/ingest.py b/apps/worker/worker_app/tasks/ingest.py
index 9410d74f8..f96e8f5b6 100755
--- a/apps/worker/worker_app/tasks/ingest.py
+++ b/apps/worker/worker_app/tasks/ingest.py
@@ -808,17 +808,23 @@ def ingest_asset(job_id: str) -> dict:
 
         db.commit()
 
-        # ── #1970 素材原子切片：视频 READY 后异步触发，失败不阻断入库 ──
+        # ── #1970 素材原子切片 + #2035 质量评分：视频 READY 后异步触发，失败不阻断入库 ──
         # atom_clips 未就绪时选片逻辑有内存兜底（compute_fallback_clips）。
+        # quality_score 未计算时选片按 50 分兜底。
         try:
             if media_type == "video" and float(asset.duration or 0) > 0:
                 celery_app.send_task(
                     "worker.generate_atom_clips",
                     args=[asset.id],
                 )
+                # #2035: 异步质量评分（不与 atom_clips 链式耦合，独立任务）
+                celery_app.send_task(
+                    "worker.calculate_asset_quality",
+                    args=[asset.id],
+                )
         except Exception as atom_err:  # noqa: BLE001
             logger.warning(
-                "触发原子切片任务失败（不影响入库）: asset_id=%s err=%s",
+                "触发原子切片/质量评分任务失败（不影响入库）: asset_id=%s err=%s",
                 asset.id,
                 atom_err,
             )
diff --git a/packages/adapters/sqlalchemy_impl/asset_atom_clip_repository.py b/packages/adapters/sqlalchemy_impl/asset_atom_clip_repository.py
index c1f09abdd..c62bb0bde 100644
--- a/packages/adapters/sqlalchemy_impl/asset_atom_clip_repository.py
+++ b/packages/adapters/sqlalchemy_impl/asset_atom_clip_repository.py
@@ -83,6 +83,23 @@ class SQLAlchemyAssetAtomClipRepository:
         models = query.all()
         return [self._to_domain(m) for m in models]
 
+    def update_caption_embedding(self, clip_id: str, caption: str | None, embedding: list[float] | None = None) -> bool:
+        """更新片段的 caption 和 embedding 字段。"""
+        upd: dict = {}
+        if caption is not None:
+            upd["caption"] = caption
+        if embedding is not None:
+            upd["embedding"] = embedding
+        if not upd:
+            return False
+        count = (
+            self.session.query(AssetAtomClipModel)
+            .filter(AssetAtomClipModel.id == clip_id)
+            .update(upd)
+        )
+        self.session.commit()
+        return count > 0
+
     def update_ai_tags(self, clip_id: str, ai_tags: dict) -> bool:
         """更新指定片段的 ai_tags 字段."""
         count = (
@@ -118,6 +135,8 @@ class SQLAlchemyAssetAtomClipRepository:
             clip_index=clip.clip_index,
             tags=clip.tags,
             ai_tags=clip.ai_tags,
+            caption=clip.caption,
+            embedding=clip.embedding,
             scene_change_at=clip.scene_change_at,
             is_fallback=clip.is_fallback,
             created_at=clip.created_at or datetime.now(UTC),
@@ -132,6 +151,9 @@ class SQLAlchemyAssetAtomClipRepository:
             duration=model.duration,
             clip_index=model.clip_index,
             tags=model.tags or [],
+            ai_tags=getattr(model, "ai_tags", None),
+            caption=getattr(model, "caption", None),
+            embedding=getattr(model, "embedding", None),
             scene_change_at=model.scene_change_at,
             is_fallback=model.is_fallback,
             created_at=model.created_at,
diff --git a/packages/adapters/sqlalchemy_impl/models.py b/packages/adapters/sqlalchemy_impl/models.py
index 131e311c8..bf6da4a57 100755
--- a/packages/adapters/sqlalchemy_impl/models.py
+++ b/packages/adapters/sqlalchemy_impl/models.py
@@ -2,6 +2,7 @@ from datetime import UTC, datetime
 from typing import Any
 
 from sqlalchemy import (
+
     JSON,
     Boolean,
     Column,
@@ -841,6 +842,8 @@ class AssetAtomClipModel(Base):
     clip_index = Column(Integer, nullable=False)
     tags = Column(JSON, nullable=False, default=list)
     ai_tags = Column(JSON, nullable=True, default=None)
+    caption = Column(Text, nullable=True, default=None)
+    embedding = Column(JSON, nullable=True, default=None)
     scene_change_at = Column(Float, nullable=True)
     is_fallback = Column(Boolean, nullable=False, default=False)
     created_at = Column(DateTime, nullable=False, default=lambda: datetime.now(UTC))
diff --git a/packages/config/base.py b/packages/config/base.py
index 63091a365..4f78b0516 100755
--- a/packages/config/base.py
+++ b/packages/config/base.py
@@ -70,6 +70,7 @@ class SharedSettings(BaseSettings):
     doubao_timeout: int = 30
     doubao_max_retries: int = 2
     doubao_vision_model: str = "doubao-1-5-vision-pro-250915"
+    doubao_embedding_model: str = "doubao-embedding-large-text-240915"
 
     # ── MediaKit (火山引擎 AI 媒体工具) ──────────────────────────────────
     mediakit_api_key: str = ""
diff --git a/packages/domain/asset_atom_clip.py b/packages/domain/asset_atom_clip.py
index 86cd164ec..b04032b1b 100644
--- a/packages/domain/asset_atom_clip.py
+++ b/packages/domain/asset_atom_clip.py
@@ -37,6 +37,8 @@ class AssetAtomClip:
     clip_index: int
     tags: list[str] = field(default_factory=list)
     ai_tags: dict | None = None
+    caption: str | None = None
+    embedding: list[float] | None = None
     scene_change_at: float | None = None
     is_fallback: bool = False
     created_at: datetime | None = None
@@ -67,6 +69,8 @@ class AssetAtomClip:
         tags: list[str] | None = None,
         scene_change_at: float | None = None,
         is_fallback: bool = False,
+        caption: str | None = None,
+        embedding: list[float] | None = None,
     ) -> AssetAtomClip:
         """工厂方法：创建一个新的原子片段。"""
         return cls(
@@ -79,4 +83,6 @@ class AssetAtomClip:
             tags=tags or [],
             scene_change_at=scene_change_at,
             is_fallback=is_fallback,
+            caption=caption,
+            embedding=embedding,
         )
diff --git a/packages/domain/atom_clip_tagger.py b/packages/domain/atom_clip_tagger.py
index f40dbd1a5..f64e2ec69 100644
--- a/packages/domain/atom_clip_tagger.py
+++ b/packages/domain/atom_clip_tagger.py
@@ -35,6 +35,7 @@ def build_vision_prompt() -> str:
     - action: 动作类型列表（如 "演示", "说话", "操作"）
     - shot: 景别（"特写" / "中景" / "远景" 之一）
     - has_text: 画面中是否有显著文字（true/false）
+    - caption: 一句中文画面描述（10-30字），简洁概括这段视频的内容主体与场景
     """
     return """请分析这段视频片段的关键帧，识别内容并返回 JSON 格式标签。
 
@@ -44,7 +45,8 @@ def build_vision_prompt() -> str:
   "objects": ["物体1", "物体2"],
   "action": ["动作1"],
   "shot": "特写|中景|远景",
-  "has_text": true/false
+  "has_text": true/false,
+  "caption": "一句中文描述"
 }
 
 规则：
@@ -53,6 +55,7 @@ def build_vision_prompt() -> str:
 - action: 人物或物体正在进行的动作，如"演示"、"说话"、"操作"、"展示"等，1-3个
 - shot: 景别判断，只能是"特写"、"中景"或"远景"之一
 - has_text: 画面中是否有显著可读文字（标题、字幕、标语等）
+- caption: 一句简洁的中文画面描述（10-30字），概括这段视频的主体内容、人物动作和场景，例如"一名女性在办公室中讲解产品展示"
 
 请只返回 JSON，不要有其他说明文字。"""
 
@@ -65,7 +68,7 @@ def parse_vision_response(text: str) -> dict:
 
     Returns:
         结构化标签 dict，格式如：
-        {"scene": [...], "objects": [...], "action": [...], "shot": "...", "has_text": bool}
+        {"scene": [...], "objects": [...], "action": [...], "shot": "...", "has_text": bool, "caption": "..."}
 
     解析失败时返回空 dict。
     """
@@ -127,6 +130,15 @@ def parse_vision_response(text: str) -> dict:
     else:
         result["has_text"] = False
 
+    cap_val = data.get("caption", "")
+    if isinstance(cap_val, str):
+        cap_val = cap_val.strip()
+        if len(cap_val) > 60:
+            cap_val = cap_val[:60]
+    else:
+        cap_val = ""
+    result["caption"] = cap_val
+
     return result
 
 
@@ -237,14 +249,14 @@ def tag_atom_clip(
     Returns:
         结构化标签 dict，格式如：
         {"scene": [...], "objects": [...], "action": [...], "shot": "...",
-         "has_text": bool, "inherited_tags": [...]}
+         "has_text": bool, "caption": "...", "inherited_tags": [...]}
     """
     inherited = list(getattr(clip, "tags", []) or [])
 
     # 检查 DoubaoClient 是否可用
     if not getattr(doubao_client, "is_available", False):
         logger.info("DoubaoClient 不可用，跳过 AI 标签: clip_id=%s", getattr(clip, "id", ""))
-        return {"inherited_tags": inherited}
+        return {"scene": [], "objects": [], "action": [], "shot": "", "has_text": False, "caption": "", "inherited_tags": inherited}
 
     # 提取帧图片
     frame_urls: Optional[list[str]] = None
@@ -261,7 +273,7 @@ def tag_atom_clip(
 
     if not frame_urls:
         logger.warning("帧提取失败，跳过 AI 标签: clip_id=%s", getattr(clip, "id", ""))
-        return {"inherited_tags": inherited}
+        return {"scene": [], "objects": [], "action": [], "shot": "", "has_text": False, "caption": "", "inherited_tags": inherited}
 
     # 调用视觉 API
     prompt = build_vision_prompt()
@@ -275,17 +287,17 @@ def tag_atom_clip(
         )
     except Exception as e:
         logger.warning("视觉 API 调用异常: clip_id=%s error=%s", getattr(clip, "id", ""), e)
-        return {"inherited_tags": inherited}
+        return {"scene": [], "objects": [], "action": [], "shot": "", "has_text": False, "caption": "", "inherited_tags": inherited}
 
     if not response_text:
         logger.warning("视觉 API 返回空: clip_id=%s", getattr(clip, "id", ""))
-        return {"inherited_tags": inherited}
+        return {"scene": [], "objects": [], "action": [], "shot": "", "has_text": False, "caption": "", "inherited_tags": inherited}
 
     # 解析标签
     ai_tags = parse_vision_response(response_text)
     if not ai_tags:
         logger.warning("标签解析失败: clip_id=%s response=%s", getattr(clip, "id", ""), response_text[:200])
-        return {"inherited_tags": inherited}
+        return {"scene": [], "objects": [], "action": [], "shot": "", "has_text": False, "caption": "", "inherited_tags": inherited}
 
     # 合并 inherited_tags
     ai_tags["inherited_tags"] = inherited
diff --git a/packages/domain/narrative_match.py b/packages/domain/narrative_match.py
index 9a0a5b978..2cd78c87c 100644
--- a/packages/domain/narrative_match.py
+++ b/packages/domain/narrative_match.py
@@ -245,16 +245,39 @@ def pick_narrative_assets(
         clip_ai_tags_by_asset=clip_ai_tags_by_asset,
     )
 
+    # #2035：把文案标签与聚合的素材级 ai_tags 透传给 smart_select_assets，
+    # 让 smart 评分维度（ai_semantic）在叙事模式内部兜底/补位时同样生效。
+    wanted_norm = _normalize_tags(script_tags)
+    asset_ai_tags: dict[str, dict] = {}
+    if clip_ai_tags_by_asset:
+        for aid, clips in clip_ai_tags_by_asset.items():
+            agg: dict = {"scene": [], "objects": [], "action": []}
+            for clip_tags in clips or []:
+                if not isinstance(clip_tags, dict):
+                    continue
+                for key in ("scene", "objects", "action"):
+                    for v in clip_tags.get(key) or []:
+                        v = str(v).strip()
+                        if v and v not in agg[key]:
+                            agg[key].append(v)
+            asset_ai_tags[aid] = agg
+
+    smart_kwargs = dict(
+        kind="video",
+        rng=rng,
+        script_tags=wanted_norm if wanted_norm else None,
+        ai_tags_by_asset=asset_ai_tags if asset_ai_tags else None,
+    )
+
     need = limit if (limit is not None and limit > 0) else None
 
     if not matched:
-        # 完全降级：与改造前随机混剪同一逻辑
-        return [r.asset for r in smart_select_assets(assets, kind="video", limit=need, rng=rng)]
+        return [r.asset for r in smart_select_assets(assets, limit=need, **smart_kwargs)]
 
-    picked = [r.asset for r in smart_select_assets(matched, kind="video", limit=need, rng=rng)]
+    picked = [r.asset for r in smart_select_assets(matched, limit=need, **smart_kwargs)]
     if need is not None and len(picked) < need and unmatched:
         rest_need = need - len(picked)
-        picked.extend(r.asset for r in smart_select_assets(unmatched, kind="video", limit=rest_need, rng=rng))
+        picked.extend(r.asset for r in smart_select_assets(unmatched, limit=rest_need, **smart_kwargs))
     elif need is None:
-        picked.extend(r.asset for r in smart_select_assets(unmatched, kind="video", rng=rng))
+        picked.extend(r.asset for r in smart_select_assets(unmatched, **smart_kwargs))
     return picked
diff --git a/packages/domain/smart_match.py b/packages/domain/smart_match.py
index 85ba709d3..d4ca3324d 100755
--- a/packages/domain/smart_match.py
+++ b/packages/domain/smart_match.py
@@ -40,6 +40,14 @@ def _get_enum_value(obj: Any, attr: str) -> str:
     return val.value if hasattr(val, "value") else str(val)
 
 
+def normalize_tag(tag) -> str:
+    """标准化标签：去两端空白、小写；非 str 转 str。返回空串表示应丢弃。"""
+    if tag is None:
+        return ""
+    s = str(tag).strip().lower()
+    return s
+
+
 def _duration_bucket(duration: float | None) -> str:
     """将素材时长分为 3 档：short(<10s) / medium(10-30s) / long(>30s)。"""
     if duration is None or duration <= 0:
@@ -54,14 +62,21 @@ def _duration_bucket(duration: float | None) -> str:
 def score_asset(
     asset: Any,
     now: datetime | None = None,
+    script_tags: set | None = None,
+    ai_tags_by_asset: dict | None = None,
 ) -> tuple[float, dict[str, float]]:
     """为单个素材计算综合得分（0-100）。
 
-    维度权重：
-    - quality_score (40%)：素材质量分（0-100），无质量分按 50 计
-    - duration_fitness (30%)：时长适配度，5-30s 为最优区间
-    - recency (20%)：新鲜度，30 天内衰减
-    - unused_bonus (10%)：未被使用过的素材加分
+    维度权重（#2035 加入 AI 语义匹配维度）：
+    - quality_score (30%)：素材质量分（0-100），无质量分按 50 计
+    - duration_fitness (25%)：时长适配度，5-30s 为最优区间
+    - recency (15%)：新鲜度，30 天内衰减
+    - unused (10%)：未被/少被使用过的素材加分
+    - ai_semantic (20%)：AI 标签（scene/objects/action）与文案标签重合度；无数据给 50 中性分
+
+    Args:
+        script_tags: 标准化后的文案标签集合，用于 AI 语义匹配维度打分。
+        ai_tags_by_asset: asset_id → ai_tags dict 映射，ai_tags 含 scene/objects/action 字段。
 
     Returns:
         (total_score, breakdown_dict)
@@ -73,7 +88,7 @@ def score_asset(
 
     # 1. 质量分 (0-100) → 权重 40%
     raw_quality = asset.quality_score if asset.quality_score is not None else 50.0
-    quality_component = raw_quality * 0.4
+    quality_component = raw_quality * 0.30
     breakdown["quality"] = round(quality_component, 2)
 
     # 2. 时长适配度 (0-100) → 权重 30%
@@ -90,7 +105,7 @@ def score_asset(
         # >30s: 指数衰减，60s 时约 50 分
         duration_fitness = 100.0 * math.exp(-0.02 * (duration - 30))
         duration_fitness = max(duration_fitness, 10.0)
-    duration_component = duration_fitness * 0.3
+    duration_component = duration_fitness * 0.25
     breakdown["duration"] = round(duration_component, 2)
 
     # 3. 新鲜度 (0-100) → 权重 20%
@@ -103,7 +118,7 @@ def score_asset(
             created_at = created_at.replace(tzinfo=UTC)
         age_days = max(0, (now - created_at).total_seconds() / 86400)
         recency = 100.0 * math.exp(-0.05 * age_days)  # ~14天半衰期
-    recency_component = recency * 0.2
+    recency_component = recency * 0.15
     breakdown["recency"] = round(recency_component, 2)
 
     # 4. 未使用偏好 (0-100) → 权重 10%
@@ -121,7 +136,34 @@ def score_asset(
     unused_component = unused_score * 0.1
     breakdown["unused"] = round(unused_component, 2)
 
-    total = quality_component + duration_component + recency_component + unused_component
+    # 5. AI 语义匹配 (0-100) → 权重 20%
+    if script_tags and ai_tags_by_asset:
+        asset_ai = ai_tags_by_asset.get(getattr(asset, "id", "")) or {}
+        ai_terms: set = set()
+        for key in ("scene", "objects", "action"):
+            vals = asset_ai.get(key) or []
+            if isinstance(vals, list):
+                for v in vals:
+                    norm = normalize_tag(v)
+                    if norm:
+                        ai_terms.add(norm)
+        if ai_terms:
+            norm_script = {normalize_tag(t) for t in script_tags if normalize_tag(t)}
+            overlap = ai_terms & norm_script
+            union = ai_terms | norm_script
+            ratio = (len(overlap) / len(union)) if union else 0.0
+            if overlap:
+                ai_score = 50.0 + 50.0 * ratio
+            else:
+                ai_score = 20.0
+        else:
+            ai_score = 50.0
+    else:
+        ai_score = 50.0
+    ai_component = ai_score * 0.20
+    breakdown["ai_semantic"] = round(ai_component, 2)
+
+    total = quality_component + duration_component + recency_component + unused_component + ai_component
     return round(total, 2), breakdown
 
 
@@ -132,6 +174,8 @@ def smart_select_assets(
     kind: str | None = None,
     now: datetime | None = None,
     rng: random.Random | None = None,
+    script_tags: set | None = None,
+    ai_tags_by_asset: dict | None = None,
 ) -> list[SmartMatchResult]:
     """从素材列表中智能选取素材。
 
@@ -159,7 +203,7 @@ def smart_select_assets(
     # Step 3: 评分
     scored: list[SmartMatchResult] = []
     for a in ready_assets:
-        total, breakdown = score_asset(a, now=now)
+        total, breakdown = score_asset(a, now=now, script_tags=script_tags, ai_tags_by_asset=ai_tags_by_asset)
         scored.append(SmartMatchResult(asset=a, score=total, breakdown=breakdown))
 
     # Step 4: 按「得分 + 随机噪声」降序排序
diff --git a/packages/shared/ai_client.py b/packages/shared/ai_client.py
index 5467013f3..4304948bb 100755
--- a/packages/shared/ai_client.py
+++ b/packages/shared/ai_client.py
@@ -40,6 +40,46 @@ class DoubaoClient:
         self.vision_model: str = settings.doubao_vision_model
 
     @property
+
+    def embed_text(self, text: str, timeout: int | None = None) -> list[float] | None:
+        """调用豆包文本 Embedding API，返回浮点向量；失败返回 None。"""
+        if not self.is_available or not text or not text.strip():
+            return None
+
+        url = f"{self.base_url}/embeddings"
+        headers = {
+            "Authorization": f"Bearer {self.api_key}",
+            "Content-Type": "application/json",
+        }
+        payload: dict[str, Any] = {
+            "model": getattr(self, "embedding_model", None) or "doubao-embedding-large-text-240915",
+            "input": text.strip(),
+            "encoding_format": "float",
+        }
+
+        req_timeout = timeout or self.timeout
+        last_error: Exception | None = None
+        for attempt in range(self.max_retries + 1):
+            try:
+                resp = httpx.post(url, headers=headers, json=payload, timeout=req_timeout)
+                resp.raise_for_status()
+                data = resp.json()
+                emb_list = data.get("data") or []
+                if emb_list and isinstance(emb_list, list):
+                    vec = emb_list[0].get("embedding")
+                    if isinstance(vec, list) and vec:
+                        return [float(x) for x in vec]
+                logger.warning("embedding 返回结构异常: %s", str(data)[:200])
+                return None
+            except Exception as e:
+                last_error = e
+                if attempt < self.max_retries:
+                    wait = 0.5 * (2**attempt)
+                    logger.warning("豆包 Embedding 调用失败，%.1fs 后重试 (%d/%d): %s", wait, attempt+1, self.max_retries+1, e)
+                    time.sleep(wait)
+        logger.error("豆包 Embedding 调用最终失败: %s", last_error)
+        return None
+
     def is_available(self) -> bool:
         """是否可用（配置了 API Key）."""
         return bool(self.api_key)
diff --git a/tests/unit/test_1970_atom_clip_tagger.py b/tests/unit/test_1970_atom_clip_tagger.py
index 5b95107b9..b3808119c 100644
--- a/tests/unit/test_1970_atom_clip_tagger.py
+++ b/tests/unit/test_1970_atom_clip_tagger.py
@@ -210,7 +210,12 @@ class TestTagAtomClip:
             doubao_client=fake_doubao,
         )
 
-        assert result == {"inherited_tags": ["tag1", "tag2"]}
+        assert result["inherited_tags"] == ["tag1", "tag2"]
+        assert result.get("caption", "") == ""
+        assert result.get("scene", []) == []
+        assert result.get("objects", []) == []
+        assert result.get("action", []) == []
+        assert "inherited_tags" in result
         assert len(fake_doubao.vision_calls) == 0
 
     def test_mediakit_unavailable_no_ffmpeg(self):
@@ -227,7 +232,12 @@ class TestTagAtomClip:
         )
 
         # 没有 ffmpeg 的情况下，帧提取失败
-        assert result == {"inherited_tags": ["tag1", "tag2"]}
+        assert result["inherited_tags"] == ["tag1", "tag2"]
+        assert result.get("caption", "") == ""
+        assert result.get("scene", []) == []
+        assert result.get("objects", []) == []
+        assert result.get("action", []) == []
+        assert "inherited_tags" in result
 
     def test_vision_api_error_returns_inherited(self):
         """视觉 API 抛异常 → 降级 inherited_tags."""
@@ -242,7 +252,12 @@ class TestTagAtomClip:
             mediakit_client=fake_mediakit,
         )
 
-        assert result == {"inherited_tags": ["tag1", "tag2"]}
+        assert result["inherited_tags"] == ["tag1", "tag2"]
+        assert result.get("caption", "") == ""
+        assert result.get("scene", []) == []
+        assert result.get("objects", []) == []
+        assert result.get("action", []) == []
+        assert "inherited_tags" in result
 
     def test_vision_api_empty_response(self):
         """视觉 API 返回空 → 降级 inherited_tags."""
@@ -257,7 +272,12 @@ class TestTagAtomClip:
             mediakit_client=fake_mediakit,
         )
 
-        assert result == {"inherited_tags": ["tag1", "tag2"]}
+        assert result["inherited_tags"] == ["tag1", "tag2"]
+        assert result.get("caption", "") == ""
+        assert result.get("scene", []) == []
+        assert result.get("objects", []) == []
+        assert result.get("action", []) == []
+        assert "inherited_tags" in result
 
     def test_vision_api_invalid_json_response(self):
         """视觉 API 返回无效 JSON → 降级 inherited_tags."""
@@ -272,7 +292,12 @@ class TestTagAtomClip:
             mediakit_client=fake_mediakit,
         )
 
-        assert result == {"inherited_tags": ["tag1", "tag2"]}
+        assert result["inherited_tags"] == ["tag1", "tag2"]
+        assert result.get("caption", "") == ""
+        assert result.get("scene", []) == []
+        assert result.get("objects", []) == []
+        assert result.get("action", []) == []
+        assert "inherited_tags" in result
 
     def test_clip_with_empty_tags(self):
         """空素材标签 → inherited_tags 为空列表."""
@@ -285,7 +310,8 @@ class TestTagAtomClip:
             doubao_client=fake_doubao,
         )
 
-        assert result == {"inherited_tags": []}
+        assert result["inherited_tags"] == []
+        assert result.get("caption", "") == ""
 
 
 if __name__ == "__main__":
diff --git a/tests/unit/test_2035_semantic_tags.py b/tests/unit/test_2035_semantic_tags.py
new file mode 100644
index 000000000..4909a588b
--- /dev/null
+++ b/tests/unit/test_2035_semantic_tags.py
@@ -0,0 +1,257 @@
+"""#2035 语义标签增强 / 质量评分 / AI选片 单测。"""
+from __future__ import annotations
+
+import random
+from dataclasses import dataclass, field
+from datetime import UTC, datetime, timedelta
+
+import pytest
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+from packages.domain.atom_clip_tagger import parse_vision_response
+from packages.domain.narrative_match import (
+    _compute_ai_score,
+    _extract_ai_tag_names,
+    match_assets_by_script_tags,
+    pick_narrative_assets,
+)
+from packages.domain.smart_match import score_asset, smart_select_assets
+
+
+# ── helpers ──────────────────────────────────────────────────────
+
+
+@dataclass
+class FakeAsset:
+    id: str
+    tag_ids: list[str] = field(default_factory=list)
+    tags: list[str] = field(default_factory=list)
+    status: object = None
+    file_type: str = "video"
+    duration: float = 10.0
+    quality_score: float | None = 50.0
+    created_at: datetime | None = None
+    metadata: dict = field(default_factory=dict)
+    usage_count: int = 0
+
+    def __post_init__(self):
+        if self.status is None:
+            class _S:
+                value = "ready"
+            self.status = _S()
+        if self.created_at is None:
+            self.created_at = datetime.now(UTC) - timedelta(days=1)
+
+
+# ── parse_vision_response: caption 提取 ─────────────────────────
+
+
+class TestParseVisionResponseCaption:
+    def test_extracts_caption(self):
+        text = '{"scene":["办公室"],"objects":["电脑","人"],"action":["说话"],"shot":"中景","has_text":false,"caption":"职场女性在办公室讲解产品功能"}'
+        result = parse_vision_response(text)
+        assert result["caption"] == "职场女性在办公室讲解产品功能"
+        assert result["has_text"] is False
+        assert result["scene"] == ["办公室"]
+
+    def test_caption_truncated_at_60(self):
+        long = "A" * 100
+        text = '{"scene":[],"objects":[],"action":[],"shot":"中景","has_text":false,"caption":"' + long + '"}'
+        result = parse_vision_response(text)
+        assert len(result["caption"]) == 60
+
+    def test_missing_caption_defaults_empty(self):
+        text = '{"scene":[],"objects":[],"action":[],"shot":"特写","has_text":true}'
+        result = parse_vision_response(text)
+        assert result["caption"] == ""
+
+    def test_empty_input_returns_empty_dict(self):
+        assert parse_vision_response("") == {}
+        assert parse_vision_response(None) == {}
+
+
+# ── AI 标签提取 ──────────────────────────────────────────────────
+
+
+class TestExtractAiTagNames:
+    def test_extracts_scene_objects_action(self):
+        tags = {"scene": ["办公室"], "objects": ["电脑", "杯子"], "action": ["说话"], "shot": "中景", "has_text": False}
+        names = _extract_ai_tag_names(tags)
+        assert "办公室" in names
+        assert "电脑" in names
+        assert "杯子" in names
+        assert "说话" in names
+        assert "中景" not in names  # shot 不参与匹配
+
+    def test_empty_tags(self):
+        assert _extract_ai_tag_names({}) == set()
+        assert _extract_ai_tag_names({"scene": []}) == set()
+
+
+# ── _compute_ai_score ───────────────────────────────────────────
+
+
+class TestComputeAiScore:
+    def test_basic_hit(self):
+        clip_map = {"a1": [{"scene": ["工厂"], "objects": ["产品"], "action": ["演示"]}]}
+        score = _compute_ai_score("a1", {"工厂", "演示"}, clip_map)
+        # 2 hits * weight 2.0 = 4.0
+        assert score == 4.0
+
+    def test_no_hit(self):
+        clip_map = {"a1": [{"scene": ["户外"], "objects": [], "action": []}]}
+        assert _compute_ai_score("a1", {"办公室"}, clip_map) == 0.0
+
+    def test_no_clip_map(self):
+        assert _compute_ai_score("a1", {"工厂"}, None) == 0.0
+        assert _compute_ai_score("a1", set(), {"a1": [{"scene": ["x"]}]}) == 0.0
+
+    def test_best_clip_score_not_sum(self):
+        """多片段取最高得分，不是累加。"""
+        clip_map = {
+            "a1": [
+                {"scene": ["工厂"], "objects": [], "action": []},          # 1 hit
+                {"scene": ["工厂"], "objects": ["产品"], "action": ["演示"]},  # 3 hits
+                {"scene": ["户外"], "objects": [], "action": []},          # 0
+            ]
+        }
+        score = _compute_ai_score("a1", {"工厂", "产品", "演示"}, clip_map)
+        assert score == 3 * 2.0  # best = 6.0, not (1+3+0)*2 = 8.0
+
+
+# ── match_assets_by_script_tags 接受 clip_ai_tags_by_asset ──────
+
+
+class TestMatchSplitAiTags:
+    def test_ai_hit_only_puts_in_matched(self):
+        """素材无人工标签，但 AI 标签命中 → 命中池。"""
+        assets = [FakeAsset("a1", tags=[]), FakeAsset("a2", tags=["旅游"])]
+        clip_map = {"a1": [{"scene": ["工厂"], "objects": [], "action": []}]}
+        matched, unmatched = match_assets_by_script_tags(
+            assets, script_tags=["工厂"], clip_ai_tags_by_asset=clip_map
+        )
+        assert [a.id for a in matched] == ["a1"]
+        assert [a.id for a in unmatched] == ["a2"]
+
+    def test_ai_and_manual_both_hit(self):
+        assets = [FakeAsset("a1", tags=["工厂"]), FakeAsset("a2", tags=[])]
+        clip_map = {"a1": [{"objects": ["产品"]}]}
+        matched, unmatched = match_assets_by_script_tags(
+            assets, script_tags=["工厂", "产品"], clip_ai_tags_by_asset=clip_map
+        )
+        assert [a.id for a in matched] == ["a1"]
+        # a2 无人标签也无AI命中 → unmatched
+        assert [a.id for a in unmatched] == ["a2"]
+
+
+# ── score_asset AI 语义维度 ────────────────────────────────────
+
+
+class TestScoreAssetAiSemantic:
+    def test_no_ai_data_gives_neutral_ai_component(self):
+        a = FakeAsset("a1", quality_score=80)
+        total, breakdown = score_asset(a, now=datetime.now(UTC))
+        # ai_semantic 中性分 50 * 0.20 = 10
+        assert breakdown["ai_semantic"] == 10.0
+
+    def test_ai_hit_boosts_score(self):
+        a = FakeAsset("a1", quality_score=50)
+        ai_map = {"a1": {"scene": ["工厂"], "objects": ["产品"], "action": ["演示"]}}
+        total_hit, _ = score_asset(
+            a, now=datetime.now(UTC), script_tags={"工厂", "产品"}, ai_tags_by_asset=ai_map
+        )
+        total_miss, _ = score_asset(
+            a, now=datetime.now(UTC), script_tags={"旅游"}, ai_tags_by_asset=ai_map
+        )
+        total_neutral, _ = score_asset(a, now=datetime.now(UTC))
+        assert total_hit > total_neutral
+        assert total_neutral > total_miss
+
+    def test_weights_sum_to_100(self):
+        a = FakeAsset("a1", quality_score=100, duration=15)
+        a.created_at = datetime.now(UTC)
+        a.metadata = {"generation_use_count": 0}
+        _, bd = score_asset(a, now=datetime.now(UTC))
+        # 满分素材：quality=30, duration=25, recency=~15 (new), unused=10, ai=10(neutral)
+        # 总和应该 ~90
+        assert 85 <= sum(bd.values()) <= 100.5
+
+
+# ── smart_select_assets 接受 script_tags/ai_tags_by_asset ──────
+
+
+class TestSmartSelectAi:
+    def test_ai_hit_ranks_higher(self):
+        a1 = FakeAsset("a1", quality_score=50, duration=15)
+        a2 = FakeAsset("a2", quality_score=50, duration=15)
+        a3 = FakeAsset("a3", quality_score=50, duration=15)
+        ai_map = {
+            "a1": {"scene": ["工厂"], "objects": ["产品"], "action": ["演示"]},
+            "a2": {"scene": ["户外"], "objects": [], "action": []},
+            "a3": {},
+        }
+        rng = random.Random(42)
+        results = smart_select_assets(
+            [a1, a2, a3],
+            kind="video",
+            rng=rng,
+            script_tags={"工厂", "产品", "演示"},
+            ai_tags_by_asset=ai_map,
+        )
+        assert results[0].asset.id == "a1"  # AI 命中应排第一
+
+    def test_without_ai_params_works_as_before(self):
+        a1 = FakeAsset("a1", quality_score=80, duration=15)
+        a2 = FakeAsset("a2", quality_score=40, duration=15)
+        rng = random.Random(0)
+        results = smart_select_assets([a1, a2], kind="video", rng=rng)
+        assert results[0].asset.id == "a1"
+
+
+# ── pick_narrative_assets 接受 clip_ai_tags_by_asset ────────────
+
+
+class TestPickNarrativeAi:
+    def test_ai_tagged_assets_selected_first(self):
+        a1 = FakeAsset("a1", tags=[])
+        a2 = FakeAsset("a2", tags=[])
+        a3 = FakeAsset("a3", tags=["无关"])
+        clip_map = {
+            "a1": [{"scene": ["工厂"], "objects": ["产品"], "action": ["演示"]}],
+            "a2": [{"scene": ["户外"], "objects": [], "action": []}],
+        }
+        rng = random.Random(0)
+        picked = pick_narrative_assets(
+            [a1, a2, a3],
+            script_tags=["工厂", "产品"],
+            tag_names_by_id={},
+            clip_ai_tags_by_asset=clip_map,
+            rng=rng,
+            limit=2,
+        )
+        assert picked[0].id == "a1"  # a1 命中 AI 标签应在首位
+        assert {a.id for a in picked} == {"a1", "a3"} or {a.id for a in picked} == {"a1", "a2"}
+
+
+# ── AssetAtomClip 字段扩展 ─────────────────────────────────────
+
+
+class TestAssetAtomClipNewFields:
+    def test_caption_embedding_fields(self):
+        clip = AssetAtomClip.create(
+            asset_id="a1",
+            start_time=0,
+            end_time=5,
+            clip_index=0,
+            tags=[],
+            caption="测试画面描述",
+            embedding=[0.1, 0.2, 0.3],
+        )
+        assert clip.caption == "测试画面描述"
+        assert clip.embedding == [0.1, 0.2, 0.3]
+        assert clip.ai_tags is None
+
+    def test_default_fields_none(self):
+        clip = AssetAtomClip.create("a1", 0, 5, 0)
+        assert clip.caption is None
+        assert clip.embedding is None
diff --git a/tests/unit/test_smart_match.py b/tests/unit/test_smart_match.py
index 6c28f2e92..d0da1a4ac 100755
--- a/tests/unit/test_smart_match.py
+++ b/tests/unit/test_smart_match.py
@@ -93,31 +93,31 @@ class TestScoreAsset:
     def test_no_quality_score_defaults_to_50(self):
         asset = FakeAsset(id="a1", quality_score=None, duration=15)
         score, breakdown = score_asset(asset, now=NOW)
-        # quality component should be 50 * 0.4 = 20
-        assert breakdown["quality"] == pytest.approx(20.0, abs=0.1)
+        # quality component should be 50 * 0.30 = 15
+        assert breakdown["quality"] == pytest.approx(15.0, abs=0.1)
 
     def test_optimal_duration_5_to_30_gets_full_score(self):
         for dur in [5, 10, 20, 30]:
             asset = FakeAsset(id="a1", quality_score=50, duration=dur)
             _, breakdown = score_asset(asset, now=NOW)
-            # duration component should be 100 * 0.3 = 30
-            assert breakdown["duration"] == pytest.approx(30.0, abs=0.1)
+            # duration component should be 100 * 0.25 = 25
+            assert breakdown["duration"] == pytest.approx(25.0, abs=0.1)
 
     def test_short_duration_below_5s_penalized(self):
         asset = FakeAsset(id="a1", quality_score=50, duration=2)
         _, breakdown = score_asset(asset, now=NOW)
-        assert breakdown["duration"] < 30.0
+        assert breakdown["duration"] < 25.0  # below max duration score
 
     def test_long_duration_above_30s_penalized(self):
         asset = FakeAsset(id="a1", quality_score=50, duration=120)
         _, breakdown = score_asset(asset, now=NOW)
-        assert breakdown["duration"] < 30.0
+        assert breakdown["duration"] < 25.0  # below max duration score
 
     def test_zero_duration_gives_moderate_score(self):
         asset = FakeAsset(id="a1", quality_score=50, duration=0)
         _, breakdown = score_asset(asset, now=NOW)
         # duration_fitness = 30.0, component = 30 * 0.3 = 9
-        assert breakdown["duration"] == pytest.approx(9.0, abs=0.1)
+        assert breakdown["duration"] == pytest.approx(7.5, abs=0.1)
 
     def test_unused_asset_gets_full_bonus(self):
         asset = FakeAsset(id="a1", quality_score=50, duration=15, metadata={})
@@ -133,17 +133,17 @@ class TestScoreAsset:
         """int() conversion of non-numeric metadata should not raise, should default to 0."""
         asset = FakeAsset(id="a1", quality_score=50, duration=15, metadata={"generation_use_count": "high"})
         _, breakdown = score_asset(asset, now=NOW)
-        assert breakdown["unused"] == pytest.approx(10.0, abs=0.1)  # use_count=0 → unused_score=100 → 100*0.1=10
+        assert breakdown["unused"] == pytest.approx(10.0, abs=0.1)  # use_count=0 → unused_score=100 → 100*0.10=10
 
     def test_recent_asset_scores_higher_recency(self):
         asset = FakeAsset(id="a1", quality_score=50, duration=15, created_at=NOW - timedelta(days=1))
         _, breakdown = score_asset(asset, now=NOW)
-        assert breakdown["recency"] > 15  # > 75% of max 20
+        assert breakdown["recency"] > 11  # > 75% of max 15
 
     def test_old_asset_scores_lower_recency(self):
         asset = FakeAsset(id="a1", quality_score=50, duration=15, created_at=NOW - timedelta(days=60))
         _, breakdown = score_asset(asset, now=NOW)
-        assert breakdown["recency"] < 5  # heavily decayed
+        assert breakdown["recency"] < 4  # heavily decayed
 
 
 # ── _duration_bucket tests ───────────────────────────────────────────────────
@@ -245,7 +245,7 @@ class TestSmartSelectAssets:
         assert len(results) == 1
         r = results[0]
         assert r.score > 0
-        assert set(r.breakdown.keys()) == {"quality", "duration", "recency", "unused"}
+        assert set(r.breakdown.keys()) >= {"quality", "duration", "recency", "unused", "ai_semantic"}
 
     def test_image_assets_can_be_selected(self):
         assets = [