diff --git a/apps/server/src/modules/acquisition-organize/services/scrape-input.ts b/apps/server/src/modules/acquisition-organize/services/scrape-input.ts
index 84857c27..dd4c0a97 100644
--- a/apps/server/src/modules/acquisition-organize/services/scrape-input.ts
+++ b/apps/server/src/modules/acquisition-organize/services/scrape-input.ts
@@ -1,5 +1,5 @@
 import type { TmdbRichDetail, TmdbRichSeasonDetail } from "@umt/adapters";
-import type { NfoEpisode, NfoIds, NfoPerson, NfoSeason, NfoWork } from "@umt/domain";
+import { type NfoEpisode, type NfoIds, type NfoPerson, type NfoSeason, type NfoWork, scrapeKindOf } from "@umt/domain";
 import { richEntityFields } from "../../sources-identity/service/metadata-rich.ts";
 
 // SCR-1:本地作品 / 季 / 集的最终字段(media_entity.metadata、content_unit.metadata,字段级 {value, …})→ NFO 输入。
@@ -71,7 +71,7 @@ export function nfoWork(e: EntityForNfo, ids: IdentityMap): NfoWork {
     douban: ids.douban ?? null,
   };
   const crew = credits(val(m, "crew"));
-  const isTv = e.kind !== "movie";
+  const isTv = scrapeKindOf(e.kind) === "tv";
   return {
     kind: isTv ? "tvshow" : "movie",
     title: str(val(m, "title")) ?? e.title,
@@ -136,6 +136,22 @@ export function nfoEpisode(season: number, episode: number, u: UnitForNfo | unde
   };
 }
 
+/** 单元被元数据来源填过(名称 / 简介 / 日期至少有一个字段,值为空也算:TMDB 就是没有,刷新也补不出来) */
+const filled = (m: unknown) => !!m && typeof m === "object" && ["name", "overview", "airDate"].some((k) => k in m);
+
+/**
+ * 季单元缺元数据(没有单元,或从没被元数据来源填过、也没有名称):不写「季 N」占位 NFO。
+ * 「缺」指还没取到(整理懒建、改身份后清空),不是 TMDB 本身没写简介。
+ */
+export function seasonMetadataMissing(u: UnitForNfo | undefined): boolean {
+  return !u || (!filled(u.metadata) && !str(u.title));
+}
+
+/** 集单元缺元数据(没有单元,或从没被填过、也没有标题和播出日期):不写「第 N 集」占位 NFO */
+export function episodeMetadataMissing(u: UnitForNfo | undefined): boolean {
+  return !u || (!filled(u.metadata) && !str(u.title) && !u.air_date);
+}
+
 /** 图片路径:作品海报 / 背景图,季海报,集剧照 */
 export function imagePathsOf(entityMeta: unknown) {
   return {
diff --git a/apps/server/src/modules/acquisition-organize/services/scrape.ts b/apps/server/src/modules/acquisition-organize/services/scrape.ts
index 1b028829..11ca7fe3 100644
--- a/apps/server/src/modules/acquisition-organize/services/scrape.ts
+++ b/apps/server/src/modules/acquisition-organize/services/scrape.ts
@@ -1,5 +1,5 @@
-import { randomUUID } from "node:crypto";
-import { lstat, mkdir, readdir, realpath, rename, rm, writeFile } from "node:fs/promises";
+import { createHash, randomUUID } from "node:crypto";
+import { lstat, mkdir, readdir, readFile, realpath, rename, rm, writeFile } from "node:fs/promises";
 import { dirname, isAbsolute, join, relative, resolve } from "node:path";
 import { checkRoot, DEFAULT_ROOT_SENTINEL } from "@umt/adapters";
 import {
@@ -19,6 +19,7 @@ import {
   planScrapeTargets,
   type ScrapeTarget,
   type ScrapeVideo,
+  scrapeKindOf,
   seasonNfo,
   seasonOfDirName,
   workNfo,
@@ -31,11 +32,13 @@ import { errMessage, jsonb } from "../util.ts";
 import type { AoDeps } from "./common.ts";
 import {
   type EntityForNfo,
+  episodeMetadataMissing,
   type IdentityMap,
   imagePathsOf,
   nfoEpisode,
   nfoSeason,
   nfoWork,
+  seasonMetadataMissing,
   tmdbEntity,
   tmdbSeasonUnits,
   type UnitForNfo,
@@ -51,7 +54,10 @@ import {
 //   剧集目录 → tvshow.nfo + 海报 / 背景图 + 季目录(Season 1 / S01 / Specials)的 season.nfo 与季海报 + 每集 NFO 与剧照;
 //   季目录 → season.nfo + 季海报(季目录 poster.jpg 与上级 seasonNN-poster.jpg)+ 每集;单集文件 → 该集 NFO 与剧照。
 // - 字段:有本地作品且有元数据时用最终字段(字段锁、人工覆盖优先);否则按 TMDB id 直接取 TMDB(与刷新元数据同一映射)。
-// - 覆盖:missing 只补缺失 / overwrite 全部覆盖;写入走同目录临时文件 + rename;目标必须在登记目录内。
+// - 覆盖:update(缺省)只覆盖本工具上次写入且没被改过的文件(逐文件 sha256 记在 scrape_record.files,
+//   改过的记 scrape_user_modified)/ missing 只补缺失 / overwrite 全部覆盖;写入走同目录临时文件 + rename;
+//   目标必须在登记目录内。
+// - 季 / 集缺元数据时先按 TMDB id 现取季详情补齐,仍缺就跳过(scrape_metadata_missing,记录 partial),不写占位 NFO。
 // - 每次刮削一条 scrape_record(目录、识别结果、逐文件结果、原因);审计 organize.scrape;SSE files.changed。
 
 export const SCRAPE_TASK = "scrapeMedia";
@@ -59,7 +65,10 @@ const IMAGE_CONCURRENCY = 4;
 const DEDUPE_MS = 30 * 60_000;
 const TEMP_RE = /(\.uhd-partial|\.!qB|\.part)$/i;
 
-export async function scrapeSettings(d: AoDeps): Promise<OrganizeSettings> {
+/** 排队一侧只用到 ctx(元数据刷新后自动重刮从 sources-identity 调用) */
+type QueueDeps = Pick<AoDeps, "ctx">;
+
+export async function scrapeSettings(d: QueueDeps): Promise<OrganizeSettings> {
   const s = await d.ctx.settings.get("organize").catch(() => DEFAULT_SETTINGS.organize);
   return { ...DEFAULT_SETTINGS.organize, ...s };
 }
@@ -83,6 +92,8 @@ export interface QueueScrapeInput extends ScrapeLocation {
   idempotencyKey?: string | undefined;
   /** 只刮这些视频(库根相对路径;整理后刮削用,作品 / 季目录元数据照常初始化);缺省 = 目录下全部 */
   videos?: readonly string[] | undefined;
+  /** 任务最早开始时间(元数据刷新后的自动重刮延后执行,期间再来的刷新合进同一条排队记录) */
+  availableAt?: Date | undefined;
 }
 
 type Row = {
@@ -158,7 +169,7 @@ export async function latestEntityScrape(d: AoDeps, entityId: string): Promise<S
  * 建一条刮削记录并排任务 scrapeMedia。同一目录已有排队中(还没开始,30 分钟内)的同方式、同作品刮削时直接复用。
  */
 export async function queueScrape(
-  d: AoDeps,
+  d: QueueDeps,
   input: QueueScrapeInput,
 ): Promise<{ recordId: string; taskId: string | null; deduplicated: boolean }> {
   const db = d.ctx.db;
@@ -212,7 +223,11 @@ export async function queueScrape(
     queued = await d.ctx.engine.enqueue(
       SCRAPE_TASK,
       { recordId: rec.id },
-      { idempotencyKey: input.idempotencyKey ?? `${SCRAPE_TASK}:${rec.id}`, traceId: randomUUID() },
+      {
+        idempotencyKey: input.idempotencyKey ?? `${SCRAPE_TASK}:${rec.id}`,
+        traceId: randomUUID(),
+        ...(input.availableAt ? { availableAt: input.availableAt } : {}),
+      },
     );
   } catch (err) {
     // 只有新记录的入队失败才标失败;复用的记录可能已有接受但未关联的 run。
@@ -259,11 +274,9 @@ export async function queueScrape(
 
 // ── 作品 → 目录(作品详情「重新刮削」、入库后自动刮削) ──
 
-const isMovieKind = (k: string) => k === "movie" || k === "collection" || k === "other";
-
-/** 本地作品 → 识别结果(带已接受的 TMDB id) */
+/** 本地作品 → 识别结果(带已接受的、与作品类型一致的 TMDB id) */
 export async function entityScrapeMatch(
-  d: AoDeps,
+  d: QueueDeps,
   entityId: string,
   source: ScrapeMatch["source"],
 ): Promise<ScrapeMatch | null> {
@@ -273,12 +286,15 @@ export async function entityScrapeMatch(
     .where("id", "=", entityId)
     .executeTakeFirst();
   if (!e || e.status === "merged") return null;
+  const kind = scrapeKindOf(e.kind);
+  // 同一作品可同时有 movie 与 tv 两个 accepted 映射:只取与作品类型一致的那个
   const tmdb = await d.ctx.db
     .selectFrom("external_identity")
     .select(["external_id"])
     .where("media_entity_id", "=", entityId)
     .where("content_unit_id", "is", null)
     .where("provider", "=", "tmdb")
+    .where("entity_type", "=", kind)
     .where("status", "=", "accepted")
     .orderBy("updated_at", "desc")
     .executeTakeFirst();
@@ -286,7 +302,7 @@ export async function entityScrapeMatch(
     mediaEntityId: e.id,
     provider: tmdb ? "tmdb" : null,
     externalId: tmdb?.external_id ?? null,
-    kind: isMovieKind(e.kind) ? "movie" : "tv",
+    kind,
     title: e.title,
     year: e.year,
     source,
@@ -298,7 +314,7 @@ export async function entityScrapeMatch(
  * 推不出(视频直接在库根)时对视频文件本身刮削。只取启用的库根里 active 视频的位置。
  */
 export async function entityScrapeLocations(
-  d: AoDeps,
+  d: QueueDeps,
   entityId: string,
   kind: "movie" | "tv",
 ): Promise<ScrapeLocation[]> {
@@ -348,13 +364,14 @@ export async function entityScrapeLocations(
 
 /** 对作品的目录刮削(每个目录一条记录);没有已入库文件时返回空 */
 export async function scrapeEntity(
-  d: AoDeps,
+  d: QueueDeps,
   entityId: string,
   opts: {
     mode?: ScrapeMode | undefined;
     trigger: "auto" | "manual";
     organizationRecordId?: string | undefined;
     actor?: { type: string; id: string | null } | undefined;
+    availableAt?: Date | undefined;
   },
 ): Promise<{ recordId: string; taskId: string | null; deduplicated: boolean }[]> {
   const match = await entityScrapeMatch(d, entityId, "library");
@@ -370,6 +387,7 @@ export async function scrapeEntity(
         trigger: opts.trigger,
         organizationRecordId: opts.organizationRecordId,
         actor: opts.actor,
+        availableAt: opts.availableAt,
         idempotencyKey: opts.organizationRecordId
           ? `${SCRAPE_TASK}:record:${opts.organizationRecordId}:${i}`
           : undefined,
@@ -378,6 +396,31 @@ export async function scrapeEntity(
   return out;
 }
 
+/** 元数据刷新后自动重刮的延迟:这段时间内再来的刷新合进同一条排队记录(防抖) */
+export const RESCRAPE_DELAY_MS = 2 * 60_000;
+
+/**
+ * 元数据刷新(或改身份后的刷新)改变了作品的 NFO 字段:对刮削过的作品(有成功 / 部分成功的刮削记录)排一次
+ * 「更新」模式重刮,延后 RESCRAPE_DELAY_MS 执行;还没开始的同目录更新刮削直接复用(queueScrape 合批)。
+ * 返回排上(含复用)的记录数;没刮削过的作品不排。
+ */
+export async function scheduleEntityRescrape(d: QueueDeps, entityId: string): Promise<number> {
+  const scraped = await d.ctx.db
+    .selectFrom("scrape_record")
+    .select("id")
+    .where("media_entity_id", "=", entityId)
+    .where("status", "in", ["succeeded", "partial"])
+    .limit(1)
+    .executeTakeFirst();
+  if (!scraped) return 0;
+  const out = await scrapeEntity(d, entityId, {
+    mode: "update",
+    trigger: "auto",
+    availableAt: new Date(Date.now() + RESCRAPE_DELAY_MS),
+  });
+  return out.length;
+}
+
 /** 整理入库成功后(设置打开或本次要求刮削):照 MP 对作品目录刮削,集只刮本次整理的文件。 */
 export async function scrapeAfterImport(
   d: AoDeps,
@@ -552,6 +595,50 @@ async function coverageOf(
   return out;
 }
 
+const sha256 = (c: Uint8Array | string) => createHash("sha256").update(c).digest("hex");
+/** 旧版本写的文件没有 hash:修改时间不晚于那次刮削结束(加这点余量)就当没被改过 */
+const LEGACY_MTIME_SLACK_MS = 2_000;
+const missingMeta = (t: ScrapeTarget): ScrapeFileResult => ({
+  path: t.path,
+  kind: t.kind,
+  role: t.role,
+  action: "skipped",
+  reason: "scrape_metadata_missing",
+});
+
+interface PrevWrite {
+  /** 写入时的 sha256;旧版本记录没有 */
+  hash: string | null;
+  /** 那次刮削结束时间(毫秒) */
+  at: number;
+}
+
+/**
+ * 同一登记目录里以前的刮削记录 → 本工具最近一次写入(或核对未变)的文件:路径 → hash。
+ * 从新到旧取每个路径第一条带 hash 的结果;旧版本只有 written、没有 hash 的按结束时间兜底。
+ */
+async function previousWrites(d: AoDeps, rootId: string, exceptId: string): Promise<Map<string, PrevWrite>> {
+  const rows = await d.ctx.db
+    .selectFrom("scrape_record")
+    .select(["files", "finished_at"])
+    .where("root_id", "=", rootId)
+    .where("id", "<>", exceptId)
+    .where("finished_at", "is not", null)
+    .orderBy("finished_at", "desc")
+    .limit(500)
+    .execute();
+  const out = new Map<string, PrevWrite>();
+  for (const r of rows) {
+    const at = new Date(r.finished_at!).getTime();
+    for (const f of (r.files ?? []) as ScrapeFileResult[]) {
+      if (out.has(f.path)) continue;
+      if (f.hash) out.set(f.path, { hash: f.hash, at });
+      else if (f.action === "written") out.set(f.path, { hash: null, at });
+    }
+  }
+  return out;
+}
+
 interface Fields {
   entity: EntityForNfo;
   ids: IdentityMap;
@@ -579,6 +666,8 @@ export async function runScrapeRecord(
   const mode = rec.mode as ScrapeMode;
   let match = (rec.match ?? null) as ScrapeMatch | null;
   const dirs = new Set<string>();
+  /** 逐文件结果;兜底异常时也保留已经写了的 */
+  const files: ScrapeFileResult[] = [];
 
   const finish = async (r: {
     status: ScrapeRecord["status"];
@@ -681,7 +770,7 @@ export async function runScrapeRecord(
         const ids: IdentityMap = {};
         const idRows = await db
           .selectFrom("external_identity")
-          .select(["provider", "external_id"])
+          .select(["provider", "external_id", "entity_type"])
           .where("media_entity_id", "=", e.id)
           .where("content_unit_id", "is", null)
           .where("status", "=", "accepted")
@@ -689,6 +778,8 @@ export async function runScrapeRecord(
           .execute();
         for (const r of idRows) {
           const p = r.provider.toLowerCase() as keyof IdentityMap;
+          // TMDB 映射只认与刮削类型一致的(电影 / 剧集各一个时不串)
+          if (p === "tmdb" && r.entity_type !== kind) continue;
           if (["tmdb", "imdb", "tvdb", "douban"].includes(p) && !ids[p]) ids[p] = r.external_id;
         }
         if (!match.externalId && ids.tmdb) match = { ...match, provider: "tmdb", externalId: ids.tmdb };
@@ -757,6 +848,7 @@ export async function runScrapeRecord(
     }
 
     // ── 没有本地字段:按 TMDB 条目直接取 ──
+    let fromTmdb = false;
     if (!fields) {
       if (!match.externalId) return await fail("scrape_no_metadata");
       let detail: Awaited<ReturnType<typeof d.ports.scrapeTmdbDetail>>;
@@ -770,22 +862,38 @@ export async function runScrapeRecord(
       const t = tmdbEntity(detail);
       fields = { entity: t.entity, ids: t.ids, seasonUnit: new Map(), episodeUnit: new Map() };
       match = { ...match, provider: "tmdb", title: detail.title, year: detail.year };
-      if (kind === "tv") {
-        const seasons = [...new Set(videos.map((v) => v.season).filter((s): s is number => typeof s === "number"))];
-        for (const n of seasons) {
-          const sd = await d.ports.scrapeTmdbSeason(match.externalId!, n).catch((err) => {
-            d.ctx.logger.warn({ recordId, season: n, err: { message: errMessage(err) } }, "刮削取 TMDB 季详情失败");
-            return null;
-          });
-          if (!sd) continue;
-          const u = tmdbSeasonUnits(sd);
-          fields.seasonUnit.set(n, u.season);
-          for (const [ep, eu] of u.episodes) fields.episodeUnit.set(`${n}:${ep}`, eu);
+      fromTmdb = true;
+    }
+
+    // ── 季 / 集元数据:TMDB 分支取每个涉及的季;本地分支只在季 / 集单元缺元数据时按 TMDB id 现取补齐 ──
+    const { seasonUnit, episodeUnit } = fields;
+    if (kind === "tv") {
+      const tmdbId = match.externalId ?? fields.ids.tmdb ?? null;
+      const seasons = [...new Set(videos.map((v) => v.season).filter((s): s is number => typeof s === "number"))];
+      for (const n of seasons.sort((a, b) => a - b)) {
+        const lacking =
+          (lay.parts.season && seasonMetadataMissing(seasonUnit.get(n))) ||
+          videos.some(
+            (v) =>
+              v.season === n &&
+              typeof v.episode === "number" &&
+              episodeMetadataMissing(episodeUnit.get(`${n}:${v.episode}`)),
+          );
+        if (!tmdbId || (!fromTmdb && !lacking)) continue;
+        const sd = await d.ports.scrapeTmdbSeason(tmdbId, n).catch((err) => {
+          d.ctx.logger.warn({ recordId, season: n, err: { message: errMessage(err) } }, "刮削取 TMDB 季详情失败");
+          return null;
+        });
+        if (!sd) continue;
+        const u = tmdbSeasonUnits(sd);
+        // 本地已有的字段(含人工覆盖)不动,只补缺元数据的单元
+        if (fromTmdb || seasonMetadataMissing(seasonUnit.get(n))) seasonUnit.set(n, u.season);
+        for (const [ep, eu] of u.episodes) {
+          const k = `${n}:${ep}`;
+          if (fromTmdb || episodeMetadataMissing(episodeUnit.get(k))) episodeUnit.set(k, eu);
         }
       }
     }
-
-    const { seasonUnit, episodeUnit } = fields;
     const work = nfoWork(fields.entity, fields.ids);
     const seasonPosters = new Map<number, string | null>();
     for (const [n, u] of seasonUnit) seasonPosters.set(n, unitPosterPath(u.metadata));
@@ -800,7 +908,9 @@ export async function runScrapeRecord(
       options: { images: settings.scrapeImages, episodeThumbs: settings.scrapeEpisodeThumbs },
       parts: lay.parts,
     });
-    const files: ScrapeFileResult[] = [...noEpisode];
+    files.push(...noEpisode);
+    // 「更新」模式:本工具以前写过的文件(路径 → 写入时的 hash / 时间)
+    const ours = mode === "update" ? await previousWrites(d, rec.root_id, recordId) : new Map<string, PrevWrite>();
     const imageCache = new Map<string, Promise<Uint8Array>>();
     const fetchImage = (p: string) => {
       let hit = imageCache.get(p);
@@ -810,21 +920,37 @@ export async function runScrapeRecord(
       }
       return hit;
     };
-    const decide = async (t: ScrapeTarget): Promise<{ abs: string } | ScrapeFileResult> => {
+    type Decision = { abs: string; prevHash: string | null } | ScrapeFileResult;
+    const decide = async (t: ScrapeTarget): Promise<Decision> => {
       const target = resolve(rootReal, t.path);
       const base = { path: t.path, kind: t.kind, role: t.role };
       if (!inside(rootReal, target)) return { ...base, action: "failed", reason: "path_escape" };
       const ex = await lstat(target).catch(() => null);
-      if (ex && (!ex.isFile() || ex.isSymbolicLink())) return { ...base, action: "skipped", reason: "scrape_exists" };
-      if (ex && mode === "missing") return { ...base, action: "skipped", reason: "scrape_exists" };
-      return { abs: target };
+      if (!ex) return { abs: target, prevHash: null };
+      if (!ex.isFile() || ex.isSymbolicLink()) return { ...base, action: "skipped", reason: "scrape_exists" };
+      if (mode === "missing") return { ...base, action: "skipped", reason: "scrape_exists" };
+      if (mode === "overwrite") return { abs: target, prevHash: null };
+      // update:只覆盖本工具写过且之后没被改过的
+      const prev = ours.get(t.path);
+      if (!prev) return { ...base, action: "skipped", reason: "scrape_exists" };
+      const cur = sha256(await readFile(target));
+      const untouched = prev.hash ? prev.hash === cur : ex.mtimeMs <= prev.at + LEGACY_MTIME_SLACK_MS;
+      if (!untouched) return { ...base, action: "skipped", reason: "scrape_user_modified" };
+      return { abs: target, prevHash: cur };
     };
-    const write = async (t: ScrapeTarget, target: string, content: Uint8Array | string): Promise<ScrapeFileResult> => {
+    const write = async (
+      t: ScrapeTarget,
+      dec: { abs: string; prevHash: string | null },
+      content: Uint8Array | string,
+    ): Promise<ScrapeFileResult> => {
       const base = { path: t.path, kind: t.kind, role: t.role };
+      const hash = sha256(content);
+      // 更新模式下内容没变就不重写(不打扰媒体服务器)
+      if (dec.prevHash === hash) return { ...base, action: "skipped", reason: "scrape_unchanged", hash };
       try {
-        await atomicWrite(target, content);
+        await atomicWrite(dec.abs, content);
         dirs.add(dirOf(t.path));
-        return { ...base, action: "written", reason: null };
+        return { ...base, action: "written", reason: null, hash };
       } catch (err) {
         d.ctx.logger.warn({ recordId, path: t.path, err: { message: errMessage(err) } }, "刮削文件写入失败");
         return { ...base, action: "failed", reason: "scrape_write_failed" };
@@ -841,9 +967,22 @@ export async function runScrapeRecord(
       }
       let xml: string;
       if (t.role === "movie_nfo" || t.role === "tvshow_nfo") xml = workNfo(work);
-      else if (t.role === "season_nfo") xml = seasonNfo(nfoSeason(t.season!, seasonUnit.get(t.season!)));
-      else xml = episodeNfo(nfoEpisode(t.season!, t.episode!, episodeUnit.get(`${t.season}:${t.episode}`)));
-      files.push(await write(t, dec.abs, xml));
+      else if (t.role === "season_nfo") {
+        const u = seasonUnit.get(t.season!);
+        if (seasonMetadataMissing(u)) {
+          files.push(missingMeta(t));
+          continue;
+        }
+        xml = seasonNfo(nfoSeason(t.season!, u));
+      } else {
+        const u = episodeUnit.get(`${t.season}:${t.episode}`);
+        if (episodeMetadataMissing(u)) {
+          files.push(missingMeta(t));
+          continue;
+        }
+        xml = episodeNfo(nfoEpisode(t.season!, t.episode!, u));
+      }
+      files.push(await write(t, dec, xml));
     }
     // 图片:限并发,失败不影响 NFO
     const imgs = targets.filter((x) => x.kind === "image" && x.imagePath);
@@ -859,23 +998,37 @@ export async function runScrapeRecord(
           d.ctx.logger.warn({ recordId, image: t.imagePath, err: { message: errMessage(err) } }, "刮削图片下载失败");
           return { path: t.path, kind: t.kind, role: t.role, action: "failed", reason: "scrape_image_failed" };
         }
-        return write(t, dec.abs, bytes);
+        return write(t, dec, bytes);
       })),
     );
 
     const written = files.filter((f) => f.action === "written").length;
     const failed = files.filter((f) => f.action === "failed").length;
+    // 缺元数据跳过的季 / 集不算成功(要刷新元数据后再刮)
+    const lacking = files.some((f) => f.reason === "scrape_metadata_missing");
     const status: ScrapeRecord["status"] =
-      failed === 0 ? "succeeded" : written > 0 || files.some((f) => f.action === "skipped") ? "partial" : "failed";
+      failed === 0
+        ? lacking
+          ? "partial"
+          : "succeeded"
+        : written > 0 || files.some((f) => f.action === "skipped")
+          ? "partial"
+          : "failed";
     return await finish({
       status,
-      reason: failed ? (files.find((f) => f.action === "failed")?.reason ?? null) : null,
+      reason: failed
+        ? (files.find((f) => f.action === "failed")?.reason ?? null)
+        : lacking
+          ? "scrape_metadata_missing"
+          : null,
       files,
     });
   } catch (err) {
     if (signal?.aborted) throw err;
     d.ctx.logger.warn({ recordId, err: { message: errMessage(err) } }, "刮削失败");
-    return fail("scrape_write_failed");
+    // 不是写文件的错(如查库失败):记内部错误,已写的文件结果照留
+    const anyWritten = files.some((f) => f.action === "written");
+    return finish({ status: anyWritten ? "partial" : "failed", reason: "scrape_internal_error", files });
   }
 }
 
diff --git a/apps/server/src/modules/sources-identity/service/identity-admin.ts b/apps/server/src/modules/sources-identity/service/identity-admin.ts
index f4a0b5f4..05b088ad 100644
--- a/apps/server/src/modules/sources-identity/service/identity-admin.ts
+++ b/apps/server/src/modules/sources-identity/service/identity-admin.ts
@@ -29,6 +29,7 @@ import {
   settleEpisodeDecision,
 } from "./episode-resolution.ts";
 import { detachFromIdentityDecisions } from "./identity-decisions.ts";
+import { clearTmdbMetadata } from "./metadata.ts";
 import { metadataLanguages, metadataTextOptions } from "./metadata-rich.ts";
 import { recordAttempt } from "./resolve.ts";
 import { backfillRecognizeCache } from "./tmdb-recognize-cache.ts";
@@ -271,10 +272,12 @@ async function retireIdentity(exec: Exec, row: ExternalIdentityRow, actor: Actor
 /**
  * 改作品的外部映射:同 provider+类型的旧 accepted 映射退役(留修订并锁定,防止自动匹配改回),
  * 新映射 accepted + 人工锁。目标身份已被其它作品接受时 409(应走合并)。
+ * TMDB 映射变了:同一事务里清掉该作品(及季 / 集单元)tmdb 来源的元数据(人工覆盖 / 锁定保留),提交后排一次
+ * full 刷新;刷新写回新身份的字段后,刮削过的作品自动排「更新」模式重刮(refreshMetadata → scheduleEntityRescrape)。
  */
 export async function setEntityIdentity(rt: SourcesRuntime, entityId: string, input: EntityIdentitySet, actor: Actor) {
   const { ctx } = rt;
-  return ctx.db.transaction().execute(async (trx) => {
+  const r = await ctx.db.transaction().execute(async (trx) => {
     const id = await resolveEntityId(trx, entityId);
     if (!id) throw new ApiException("not_found", "作品不存在");
     const other = await entityByExternal(trx, input);
@@ -297,6 +300,21 @@ export async function setEntityIdentity(rt: SourcesRuntime, entityId: string, in
       reason: input.reason ?? null,
     });
     if (!newId) throw new ApiException("conflict", "外部身份唯一约束冲突");
+    if (input.provider === "tmdb") {
+      // 旧 TMDB 带出来的 IMDb 映射(没人工锁的)一并退役:NFO 里 IMDb 是 default uniqueid,留着会被认成旧作品;
+      // 刷新后 NFO 取新详情里的 IMDb
+      const derived = await trx
+        .selectFrom("external_identity")
+        .selectAll()
+        .where("media_entity_id", "=", id)
+        .where("content_unit_id", "is", null)
+        .where("provider", "=", "imdb")
+        .where("status", "=", "accepted")
+        .where("locked", "=", false)
+        .execute();
+      for (const o of derived) await retireIdentity(trx, o, actor, "tmdb_mapping_changed");
+      await clearTmdbMetadata(trx, id, rt.now());
+    }
     await audit(
       trx,
       actor,
@@ -310,6 +328,20 @@ export async function setEntityIdentity(rt: SourcesRuntime, entityId: string, in
     );
     return { mediaEntityId: id, changed: true, identityId: newId, retired: olds.map((o) => o.id) };
   });
+  if (r.changed && input.provider === "tmdb" && r.identityId)
+    await ctx.engine
+      .enqueue(
+        "refreshMetadata",
+        { mediaEntityId: r.mediaEntityId, full: true },
+        { idempotencyKey: `refreshMetadata:identity:${r.identityId}`, traceId: r.mediaEntityId },
+      )
+      .catch((err: unknown) =>
+        ctx.logger.warn(
+          { entityId: r.mediaEntityId, err: { message: (err as Error).message } },
+          "改映射后元数据刷新没排上",
+        ),
+      );
+  return r;
 }
 
 /** 外部身份字段修订(乐观并发 expectedRevision);每次变更写 identity_revision */
diff --git a/apps/server/src/modules/sources-identity/service/metadata-rich.ts b/apps/server/src/modules/sources-identity/service/metadata-rich.ts
index 4e06d676..34658f15 100644
--- a/apps/server/src/modules/sources-identity/service/metadata-rich.ts
+++ b/apps/server/src/modules/sources-identity/service/metadata-rich.ts
@@ -315,8 +315,20 @@ export interface SeasonMetadataResult {
   changedUnits: number;
   /** DH-1:临时转正式的集单元数(季单元转正不计) */
   promoted: number;
+  /** 写进 NFO 的字段(名称、简介、日期、时长、剧照、季海报)有变化的单元数;刷新后据此决定要不要自动重刮 */
+  nfoChangedUnits?: number;
 }
 
+/** 内容单元里写进 NFO 的字段(评分 / 票数变化不触发自动重刮) */
+export const UNIT_NFO_FIELDS: ReadonlySet<string> = new Set([
+  "name",
+  "overview",
+  "airDate",
+  "runtime",
+  "stillPath",
+  "posterPath",
+]);
+
 /**
  * 季详情 → 季单元与集单元的字段级元数据。集单元按(作品, 季, 集号)找最早建的未退役单元,没有时:
  * create = true(full 刷新 / 追踪中的季)建 confirmed 单元;否则只更新已有单元(集单元仍由发布 / 文件懒建)。
@@ -331,7 +343,14 @@ export async function applySeasonMetadata(
   opts: { create?: boolean } = {},
 ): Promise<SeasonMetadataResult> {
   const create = opts.create ?? true;
-  const out: SeasonMetadataResult = { season: sd.seasonNumber, episodes: 0, created: 0, changedUnits: 0, promoted: 0 };
+  const out: SeasonMetadataResult = {
+    season: sd.seasonNumber,
+    episodes: 0,
+    created: 0,
+    changedUnits: 0,
+    promoted: 0,
+    nfoChangedUnits: 0,
+  };
   if (sd.seasonNumber < 0) return out;
   const seasonUnit = await ensureSeason(exec, entityId, sd.seasonNumber, sd.name);
   const units = await exec
@@ -399,6 +418,7 @@ export async function applySeasonMetadata(
     if (written.length || t.fresh) {
       const r = await projectUnit(exec, t.unitId, now);
       if (r.changedFields.length) out.changedUnits++;
+      if (r.changedFields.some((f) => UNIT_NFO_FIELDS.has(f))) out.nfoChangedUnits = (out.nfoChangedUnits ?? 0) + 1;
     }
   }
   out.episodes = eps.length;
diff --git a/apps/server/src/modules/sources-identity/service/metadata.ts b/apps/server/src/modules/sources-identity/service/metadata.ts
index 34cfa24e..9b704e82 100644
--- a/apps/server/src/modules/sources-identity/service/metadata.ts
+++ b/apps/server/src/modules/sources-identity/service/metadata.ts
@@ -17,6 +17,7 @@ import type {
 } from "@umt/contracts";
 import { sql } from "@umt/db";
 import { ApiException } from "../../../http/errors.ts";
+import { scheduleEntityRescrape } from "../../acquisition-organize/services/scrape.ts";
 import { jsonb } from "../rows.ts";
 import type { SourcesRuntime } from "../runtime.ts";
 import { type Actor, audit, type Exec } from "./common.ts";
@@ -118,6 +119,102 @@ export async function writeEnrichmentFields(
   }
 }
 
+/** 作品里写进 NFO 的字段:刷新后这些字段有变化才自动重刮(评分、票数、播出状态等不算) */
+const ENTITY_NFO_FIELDS: ReadonlySet<string> = new Set([
+  "title",
+  "originalTitle",
+  "year",
+  "overview",
+  "tagline",
+  "releaseDate",
+  "genres",
+  "originCountry",
+  "platform",
+  "runtime",
+  "cast",
+  "crew",
+  "externalIds",
+  "posterPath",
+  "backdropPath",
+]);
+
+/**
+ * 改作品的 TMDB 映射后:清掉该作品及其季 / 集单元的 tmdb 来源字段(metadata_field 与投影出的最终值),
+ * 人工覆盖与锁定字段保留;单元的 title / air_date 列随 name / airDate 一起清空。之后由 full 刷新按新身份重新填,
+ * 避免新身份的 NFO 混进旧作品的标题、简介、IMDb、海报(海报 / 背景图「TMDB 没有时保留旧值」不能保留旧作品的)。
+ */
+export async function clearTmdbMetadata(trx: Exec, entityId: string, now: Date): Promise<void> {
+  const keep = (meta: Record<string, FinalFieldValue>, locks: Set<string>, overridden: Set<string>) => {
+    const out: Record<string, FinalFieldValue> = {};
+    for (const [k, v] of Object.entries(meta))
+      if (v?.source !== "tmdb" || locks.has(k) || overridden.has(k) || v.locked) out[k] = v;
+    return out;
+  };
+  const e = await trx
+    .selectFrom("media_entity")
+    .select(["metadata", "field_locks"])
+    .where("id", "=", entityId)
+    .forUpdate()
+    .executeTakeFirstOrThrow();
+  const entityOverrides = await trx
+    .selectFrom("field_override")
+    .select("field")
+    .where("media_entity_id", "=", entityId)
+    .execute();
+  await trx
+    .deleteFrom("metadata_field")
+    .where("media_entity_id", "=", entityId)
+    .where("content_unit_id", "is", null)
+    .where("source", "=", "tmdb")
+    .execute();
+  await trx
+    .updateTable("media_entity")
+    .set({
+      metadata: jsonb(
+        keep(
+          (e.metadata ?? {}) as Record<string, FinalFieldValue>,
+          new Set(e.field_locks),
+          new Set(entityOverrides.map((o) => o.field)),
+        ),
+      ),
+      updated_at: now,
+    })
+    .where("id", "=", entityId)
+    .execute();
+  // 其它来源(web / agent 补全)按原规则重新投影
+  await project(trx, entityId, now);
+
+  const units = await trx
+    .selectFrom("content_unit")
+    .select(["id", "metadata", "field_locks"])
+    .where("media_entity_id", "=", entityId)
+    .execute();
+  if (!units.length) return;
+  const ids = units.map((u) => u.id);
+  const unitOverrides = await trx
+    .selectFrom("field_override")
+    .select(["content_unit_id", "field"])
+    .where("content_unit_id", "in", ids)
+    .execute();
+  await trx.deleteFrom("metadata_field").where("content_unit_id", "in", ids).where("source", "=", "tmdb").execute();
+  for (const u of units) {
+    const meta = (u.metadata ?? {}) as Record<string, FinalFieldValue>;
+    const overridden = new Set(unitOverrides.filter((o) => o.content_unit_id === u.id).map((o) => o.field));
+    const next = keep(meta, new Set(u.field_locks), overridden);
+    if (Object.keys(next).length === Object.keys(meta).length) continue;
+    await trx
+      .updateTable("content_unit")
+      .set({
+        metadata: jsonb(next),
+        ...(next.name ? {} : { title: null }),
+        ...(next.airDate ? {} : { air_date: null }),
+        updated_at: now,
+      })
+      .where("id", "=", u.id)
+      .execute();
+  }
+}
+
 export interface RefreshResult {
   status: "refreshed" | "skipped" | "failed";
   reason?: string;
@@ -240,7 +337,7 @@ export async function refreshMetadata(
   }
   const now = rt.now();
   const rev = `tmdb:${ident.entity_type}/${ident.external_id}`;
-  return ctx.db.transaction().execute(async (trx) => {
+  const result = await ctx.db.transaction().execute(async (trx) => {
     if (richDetail) await writeRichEntityFields(trx, id, richDetail, rev, now);
     else await writeTmdbFields(trx, id, detail, rev, now);
     await trx
@@ -282,6 +379,15 @@ export async function refreshMetadata(
         : {}),
     };
   });
+  // 写进 NFO 的字段有变化:刮削过的作品延后排一次「更新」模式重刮(期间再刷新合进同一条);失败只记日志
+  const nfoChanged =
+    result.changedFields.some((f) => ENTITY_NFO_FIELDS.has(f)) ||
+    (result.episodes ?? []).some((x) => (x.nfoChangedUnits ?? 0) > 0);
+  if (nfoChanged)
+    await scheduleEntityRescrape({ ctx }, id).catch((err: unknown) =>
+      ctx.logger.warn({ entityId: id, err: { message: (err as Error).message } }, "元数据刷新后重刮没排上"),
+    );
+  return result;
 }
 
 /**
diff --git a/apps/server/test/acquisition-organize/scrape-accuracy.test.ts b/apps/server/test/acquisition-organize/scrape-accuracy.test.ts
new file mode 100644
index 00000000..68a8ce28
--- /dev/null
+++ b/apps/server/test/acquisition-organize/scrape-accuracy.test.ts
@@ -0,0 +1,327 @@
+import { readFile, stat, utimes, writeFile } from "node:fs/promises";
+import type { TmdbRichSeasonDetail } from "@umt/adapters";
+import type { ScrapeFileResult, ScrapeMatch } from "@umt/contracts";
+import { createTempTree, type TempTree } from "@umt/testkit";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { queueScrape, runScrapeRecord } from "../../src/modules/acquisition-organize/services/scrape.ts";
+import { nfoWork } from "../../src/modules/acquisition-organize/services/scrape-input.ts";
+import { createHarness, type Harness, pgAvailable, seedBase } from "./harness.ts";
+
+// 刮削准确度:
+// - 「更新」模式(缺省):不存在的写入;本工具上次写入且没被改过的按新内容覆盖(内容没变不重写);被人改过的跳过
+//   (scrape_user_modified);不是本工具写的不动;旧版本没有 hash 的记录按修改时间兜底;
+// - 集 / 季缺元数据:先按 TMDB id 现取季详情补齐;取不到跳过(scrape_metadata_missing)、记录 partial,不写占位 NFO;
+// - 合集 / 其他类作品按电影刮,NFO 根元素是 <movie>;
+// - 兜底异常记 scrape_internal_error。
+
+const hasPg = await pgAvailable();
+const at = new Date().toISOString();
+const f = (value: unknown, language: string | null = null) => ({ value, source: "tmdb", language, at, locked: false });
+const enc = (s: string) => new TextEncoder().encode(s);
+
+function season1(names: Record<number, string>): TmdbRichSeasonDetail {
+  return {
+    tvId: "95396",
+    seasonNumber: 1,
+    name: "第 1 季",
+    nameLanguage: "zh-CN",
+    overview: null,
+    overviewLanguage: null,
+    airDate: "2022-02-17",
+    posterPath: null,
+    fetchedLanguages: ["zh-CN"],
+    episodes: Object.entries(names).map(([n, name]) => ({
+      seasonNumber: 1,
+      episodeNumber: Number(n),
+      name,
+      nameLanguage: "zh-CN",
+      overview: `${name}的简介`,
+      overviewLanguage: "zh-CN",
+      airDate: "2022-02-25",
+      runtime: 50,
+      stillPath: null,
+      voteAverage: null,
+      voteCount: null,
+    })),
+  };
+}
+
+describe.skipIf(!hasPg)("刮削准确度:更新模式、缺元数据不写占位、作品类型", () => {
+  let h: Harness;
+  let lib: TempTree;
+  let rootId = "";
+  let seasonDetail: (n: number) => Promise<TmdbRichSeasonDetail | null> = async () => null;
+  const seasonCalls: number[] = [];
+
+  beforeAll(async () => {
+    lib = await createTempTree(
+      {
+        "Movies/星际穿越 (2014)/Interstellar.2014.mkv": 100,
+        "Movies/星际穿越 (2014)/fanart.jpg": "别的工具放的背景图",
+        "TV/人生切割术 (2022)/Season 1/Severance.S01E01.mkv": 100,
+        "TV/人生切割术 (2022)/Season 1/Severance.S01E02.mkv": 100,
+        "Movies/合集 (2020)/Collection.2020.mkv": 100,
+        "Movies/其他 (2021)/Other.2021.mkv": 100,
+      },
+      { sentinel: true, prefix: "umt-scracc-" },
+    );
+    h = await createHarness("scrape_acc", {
+      scrapeImage: async (p) => ({ content: enc(p), mime: "image/jpeg" }),
+      scrapeTmdbSeason: async (_tv, n) => {
+        seasonCalls.push(n);
+        return seasonDetail(n);
+      },
+    });
+    rootId = (await seedBase(h.db, { libraryPath: lib.root, cachePath: lib.root, qbUrl: "http://127.0.0.1:9" })).rootId;
+  }, 60_000);
+  afterAll(async () => {
+    await h?.close();
+    await lib?.cleanup();
+  });
+
+  async function entity(kind: "movie" | "series" | "collection" | "other", title: string, meta: object) {
+    return (
+      await h.db
+        .insertInto("media_entity")
+        .values({ kind, title, year: 2020, status: "active", metadata: JSON.stringify(meta) })
+        .returning("id")
+        .executeTakeFirstOrThrow()
+    ).id;
+  }
+  async function scrape(
+    entityId: string,
+    kind: "movie" | "tv",
+    path: string,
+    mode?: "missing" | "overwrite" | "update",
+    externalId: string | null = null,
+  ) {
+    const match: ScrapeMatch = {
+      mediaEntityId: entityId,
+      provider: externalId ? "tmdb" : null,
+      externalId,
+      kind,
+      title: "x",
+      year: null,
+      source: "library",
+    };
+    const q = await queueScrape(h.d, {
+      rootId: `lib:${rootId}`,
+      rootPath: lib.root,
+      libraryRootId: rootId,
+      path,
+      match,
+      mode,
+      trigger: "manual",
+    });
+    return runScrapeRecord(h.d, q.recordId);
+  }
+  const fileOf = (files: ScrapeFileResult[], role: string) => files.find((x) => x.role === role);
+  const setTitle = (id: string, title: string) =>
+    h.db
+      .updateTable("media_entity")
+      .set({ metadata: JSON.stringify({ title: f(title), posterPath: f("/inter.jpg") }) })
+      .where("id", "=", id)
+      .execute();
+
+  const MOVIE_DIR = "Movies/星际穿越 (2014)";
+  const MOVIE_NFO = `${MOVIE_DIR}/Interstellar.2014.nfo`;
+  let movie = "";
+
+  it("更新模式:不存在的写入并记 hash;不是本工具写的不动", async () => {
+    movie = await entity("movie", "星际穿越", { title: f("星际穿越"), posterPath: f("/inter.jpg") });
+    const r = await scrape(movie, "movie", MOVIE_DIR);
+    expect(r).toMatchObject({ status: "succeeded", mode: "update" });
+    expect(fileOf(r.files, "movie_nfo")).toMatchObject({
+      action: "written",
+      hash: expect.stringMatching(/^[0-9a-f]{64}$/),
+    });
+    expect(fileOf(r.files, "poster")).toMatchObject({ action: "written" });
+    expect(await readFile(lib.path(MOVIE_NFO), "utf8")).toContain("<title>星际穿越</title>");
+    // fanart.jpg 是别的工具放的:元数据没有背景图,不在目标里;加上背景图后更新模式也不覆盖它
+    await h.db
+      .updateTable("media_entity")
+      .set({
+        metadata: JSON.stringify({ title: f("星际穿越"), posterPath: f("/inter.jpg"), backdropPath: f("/bg.jpg") }),
+      })
+      .where("id", "=", movie)
+      .execute();
+    const again = await scrape(movie, "movie", MOVIE_DIR, "update");
+    expect(fileOf(again.files, "fanart")).toMatchObject({ action: "skipped", reason: "scrape_exists" });
+    expect(await readFile(lib.path(`${MOVIE_DIR}/fanart.jpg`), "utf8")).toBe("别的工具放的背景图");
+    // 内容没变的不重写
+    expect(fileOf(again.files, "movie_nfo")).toMatchObject({ action: "skipped", reason: "scrape_unchanged" });
+    expect(fileOf(again.files, "poster")).toMatchObject({ action: "skipped", reason: "scrape_unchanged" });
+    expect(again.status).toBe("succeeded");
+  });
+
+  it("更新模式:本工具写的、没被改过的按新内容覆盖;被人改过的跳过并记原因", async () => {
+    await setTitle(movie, "星际穿越(新译名)");
+    const upd = await scrape(movie, "movie", MOVIE_DIR, "update");
+    expect(fileOf(upd.files, "movie_nfo")).toMatchObject({ action: "written" });
+    expect(await readFile(lib.path(MOVIE_NFO), "utf8")).toContain("<title>星际穿越(新译名)</title>");
+
+    await writeFile(lib.path(MOVIE_NFO), "<movie><title>我手改的</title></movie>");
+    await setTitle(movie, "星际穿越(再改)");
+    const kept = await scrape(movie, "movie", MOVIE_DIR, "update");
+    expect(fileOf(kept.files, "movie_nfo")).toMatchObject({ action: "skipped", reason: "scrape_user_modified" });
+    expect(await readFile(lib.path(MOVIE_NFO), "utf8")).toBe("<movie><title>我手改的</title></movie>");
+    expect(kept.status).toBe("succeeded");
+    // 之后每次更新都还认得出是人改过的(跳过的结果不带 hash,不会把人改的内容当成本工具写的)
+    const still = await scrape(movie, "movie", MOVIE_DIR, "update");
+    expect(fileOf(still.files, "movie_nfo")).toMatchObject({ action: "skipped", reason: "scrape_user_modified" });
+    // 全部覆盖照旧改写
+    const over = await scrape(movie, "movie", MOVIE_DIR, "overwrite");
+    expect(fileOf(over.files, "movie_nfo")).toMatchObject({ action: "written" });
+    expect(await readFile(lib.path(MOVIE_NFO), "utf8")).toContain("<title>星际穿越(再改)</title>");
+  });
+
+  it("更新模式:旧版本记录没有 hash 时按修改时间判断", async () => {
+    // 模拟旧版本:去掉所有记录里的 hash
+    const rows = await h.db.selectFrom("scrape_record").select(["id", "files", "finished_at"]).execute();
+    for (const r of rows)
+      await h.db
+        .updateTable("scrape_record")
+        .set({
+          files: JSON.stringify((r.files as ScrapeFileResult[]).map(({ hash: _h, ...x }) => x)),
+        })
+        .where("id", "=", r.id)
+        .execute();
+    const last = rows
+      .filter((r) => r.finished_at)
+      .sort((a, b) => +new Date(b.finished_at!) - +new Date(a.finished_at!))[0]!;
+    const past = new Date(+new Date(last.finished_at!) - 60_000);
+    await utimes(lib.path(MOVIE_NFO), past, past);
+    await setTitle(movie, "星际穿越(旧记录)");
+    const r = await scrape(movie, "movie", MOVIE_DIR, "update");
+    expect(fileOf(r.files, "movie_nfo")).toMatchObject({ action: "written" });
+    expect(await readFile(lib.path(MOVIE_NFO), "utf8")).toContain("<title>星际穿越(旧记录)</title>");
+
+    // 改动时间晚于那次刮削:当作人改过
+    const rows2 = await h.db.selectFrom("scrape_record").select(["id", "files"]).execute();
+    for (const x of rows2)
+      await h.db
+        .updateTable("scrape_record")
+        .set({ files: JSON.stringify((x.files as ScrapeFileResult[]).map(({ hash: _h, ...y }) => y)) })
+        .where("id", "=", x.id)
+        .execute();
+    const future = new Date(Date.now() + 60_000);
+    await utimes(lib.path(MOVIE_NFO), future, future);
+    expect((await stat(lib.path(MOVIE_NFO))).mtimeMs).toBeGreaterThan(Date.now());
+    await setTitle(movie, "星际穿越(不该写进去)");
+    const kept = await scrape(movie, "movie", MOVIE_DIR, "update");
+    expect(fileOf(kept.files, "movie_nfo")).toMatchObject({ action: "skipped", reason: "scrape_user_modified" });
+  });
+
+  const SHOW = "TV/人生切割术 (2022)";
+  let series = "";
+
+  it("集单元没有元数据:按 TMDB id 现取季详情补齐,写出正确的集 NFO", async () => {
+    series = await entity("series", "人生切割术", {
+      title: f("人生切割术"),
+      overview: f("马克领导着一个办公室团队。"),
+    });
+    const season = await h.db
+      .insertInto("content_unit")
+      .values({
+        media_entity_id: series,
+        kind: "season",
+        season_number: 1,
+        status: "confirmed",
+        title: "第 1 季",
+        metadata: JSON.stringify({ name: f("第 1 季") }),
+      })
+      .returning("id")
+      .executeTakeFirstOrThrow();
+    await h.db
+      .insertInto("content_unit")
+      .values({
+        media_entity_id: series,
+        parent_unit_id: season.id,
+        kind: "episode",
+        season_number: 1,
+        episode_number: 1,
+        status: "confirmed",
+        title: "有关地狱的好消息",
+        metadata: JSON.stringify({ name: f("有关地狱的好消息"), overview: f("第一集简介") }),
+      })
+      .execute();
+    // 第 2 集是整理懒建的空单元
+    await h.db
+      .insertInto("content_unit")
+      .values({
+        media_entity_id: series,
+        parent_unit_id: season.id,
+        kind: "episode",
+        season_number: 1,
+        episode_number: 2,
+        status: "provisional",
+      })
+      .execute();
+    seasonDetail = async (n) => (n === 1 ? season1({ 1: "TMDB 第一集", 2: "半循环" }) : null);
+    const r = await scrape(series, "tv", SHOW, "update", "95396");
+    expect(seasonCalls).toEqual([1]);
+    expect(r.status).toBe("succeeded");
+    const ep2 = await readFile(lib.path(`${SHOW}/Season 1/Severance.S01E02.nfo`), "utf8");
+    expect(ep2).toContain("<title>半循环</title>");
+    expect(ep2).toContain("<plot><![CDATA[半循环的简介]]></plot>");
+    // 本地已有的集字段不被 TMDB 现取的值替换
+    expect(await readFile(lib.path(`${SHOW}/Season 1/Severance.S01E01.nfo`), "utf8")).toContain(
+      "<title>有关地狱的好消息</title>",
+    );
+  });
+
+  it("TMDB 季详情失败:缺元数据的集跳过(scrape_metadata_missing)、记录 partial,不写占位 NFO", async () => {
+    await writeFile(lib.path(`${SHOW}/Season 1/Severance.S01E03.mkv`), "video");
+    seasonDetail = async () => {
+      throw new Error("TMDB 超时");
+    };
+    const r = await scrape(series, "tv", SHOW, "update", "95396");
+    expect(r).toMatchObject({ status: "partial", reason: "scrape_metadata_missing" });
+    expect(r.files.find((x) => x.path.endsWith("S01E03.nfo"))).toMatchObject({
+      action: "skipped",
+      reason: "scrape_metadata_missing",
+    });
+    await expect(stat(lib.path(`${SHOW}/Season 1/Severance.S01E03.nfo`))).rejects.toThrow();
+
+    // 季单元也没有元数据时同样不写「季 N」占位
+    await h.db
+      .updateTable("content_unit")
+      .set({ title: null, metadata: JSON.stringify({}) })
+      .where("media_entity_id", "=", series)
+      .where("kind", "=", "season")
+      .execute();
+    const r2 = await scrape(series, "tv", SHOW, "overwrite", "95396");
+    expect(fileOf(r2.files, "season_nfo")).toMatchObject({ action: "skipped", reason: "scrape_metadata_missing" });
+    expect(r2.status).toBe("partial");
+  });
+
+  it("合集 / 其他类作品按电影刮削,NFO 根元素是 <movie>", async () => {
+    expect(nfoWork({ kind: "collection", title: "x", original_title: null, year: null, metadata: {} }, {}).kind).toBe(
+      "movie",
+    );
+    for (const [kind, dir, nfo] of [
+      ["collection", "Movies/合集 (2020)", "Collection.2020.nfo"],
+      ["other", "Movies/其他 (2021)", "Other.2021.nfo"],
+    ] as const) {
+      const id = await entity(kind, `${kind} 作品`, { title: f(`${kind} 作品`) });
+      const r = await scrape(id, "movie", dir);
+      expect(r.status).toBe("succeeded");
+      const xml = await readFile(lib.path(`${dir}/${nfo}`), "utf8");
+      expect(xml).toContain("\n<movie>");
+      expect(xml).not.toContain("<tvshow>");
+    }
+  });
+
+  it("兜底异常记 scrape_internal_error(不是写文件失败)", async () => {
+    h.d.ports.scrapeTmdbSeason = (() => {
+      throw new Error("意外错误");
+    }) as never;
+    await h.db
+      .updateTable("content_unit")
+      .set({ title: null, metadata: JSON.stringify({}) })
+      .where("media_entity_id", "=", series)
+      .execute();
+    const r = await scrape(series, "tv", SHOW, "update", "95396");
+    expect(r).toMatchObject({ status: "failed", reason: "scrape_internal_error" });
+  });
+});
diff --git a/apps/server/test/acquisition-organize/scrape.test.ts b/apps/server/test/acquisition-organize/scrape.test.ts
index 7531008e..88e820e4 100644
--- a/apps/server/test/acquisition-organize/scrape.test.ts
+++ b/apps/server/test/acquisition-organize/scrape.test.ts
@@ -96,7 +96,7 @@ describe.skipIf(!hasPg)("刮削:NFO 与图片写进媒体库目录", () => {
   }
 
   /** 作品详情「重新刮削」的服务端做法:对作品目录排刮削并执行 */
-  async function rescrape(entity: string, mode?: "missing" | "overwrite") {
+  async function rescrape(entity: string, mode?: "missing" | "overwrite" | "update") {
     const q = await scrapeEntity(h.d, entity, { trigger: "manual", mode });
     expect(q.length).toBe(1);
     return runScrapeRecord(h.d, q[0]!.recordId);
@@ -193,7 +193,7 @@ describe.skipIf(!hasPg)("刮削:NFO 与图片写进媒体库目录", () => {
     expect(first).toMatchObject({
       media_entity_id: series,
       trigger: "auto",
-      mode: "missing",
+      mode: "update", // 缺省覆盖方式:更新
       organization_record_id: rec,
     });
 
diff --git a/apps/server/test/file-manager/organize-in-place.test.ts b/apps/server/test/file-manager/organize-in-place.test.ts
index 247e1b52..74cadfc3 100644
--- a/apps/server/test/file-manager/organize-in-place.test.ts
+++ b/apps/server/test/file-manager/organize-in-place.test.ts
@@ -124,6 +124,12 @@ describe.skipIf(skip)("file manager in-place import", () => {
       .where("organization_record_id", "=", r.recordId)
       .execute();
     expect(recs).toMatchObject([{ path: title, videos: [ep1] }]);
+    // 季 / 集单元缺元数据时不写占位 NFO:模拟刷新元数据已填过整理懒建的单元
+    await h.db
+      .updateTable("content_unit")
+      .set({ metadata: JSON.stringify({ name: { value: "名称", source: "tmdb", language: null, at, locked: false } }) })
+      .where("media_entity_id", "=", entity)
+      .execute();
     await runScrapeRecord(h.module.deps().ao, recs[0]!.id);
     const show = await readdir(join(h.lib, title));
     const season = await readdir(join(h.lib, title, "Season 1"));
diff --git a/apps/server/test/file-manager/scrape.test.ts b/apps/server/test/file-manager/scrape.test.ts
index 4e2a1c62..0fa34f8b 100644
--- a/apps/server/test/file-manager/scrape.test.ts
+++ b/apps/server/test/file-manager/scrape.test.ts
@@ -277,7 +277,7 @@ describe.skipIf(skip)("files 刮削(SCR-2:任意目录就地刮削)", () => {
     expect(show).toMatchObject({
       status: "succeeded",
       path: SHOW,
-      mode: "missing",
+      mode: "update",
       trigger: "manual",
       match: {
         mediaEntityId: null,
diff --git a/apps/server/test/sources-identity/identity-change-rescrape.test.ts b/apps/server/test/sources-identity/identity-change-rescrape.test.ts
new file mode 100644
index 00000000..623c66d6
--- /dev/null
+++ b/apps/server/test/sources-identity/identity-change-rescrape.test.ts
@@ -0,0 +1,179 @@
+import { readFile } from "node:fs/promises";
+import { join } from "node:path";
+import { createMockTmdb, createTempTree, type MockTmdb, type TempTree, TMDB_FIXTURES } from "@umt/testkit";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import type { AoPorts } from "../../src/modules/acquisition-organize/ports.ts";
+import type { AoDeps } from "../../src/modules/acquisition-organize/services/common.ts";
+import {
+  RESCRAPE_DELAY_MS,
+  runScrapeRecord,
+  SCRAPE_TASK,
+  scrapeEntity,
+} from "../../src/modules/acquisition-organize/services/scrape.ts";
+import { createEntityFromTmdbCandidate } from "../../src/modules/sources-identity/service/entity-from-candidate.ts";
+import { setEntityIdentity } from "../../src/modules/sources-identity/service/identity-admin.ts";
+import { refreshMetadata, setFieldOverride } from "../../src/modules/sources-identity/service/metadata.ts";
+import { createHarness, type Harness, pgAvailable } from "./harness.ts";
+
+// 改作品的 TMDB 映射后:清掉旧作品的 tmdb 来源字段(人工锁定的保留)→ full 刷新 → 刮削过的作品延后排一次「更新」模式重刮;
+// 重刮后的 NFO 标题 / 简介 / IMDb / 海报都是新作品的,不残留旧作品;刷新期间再刷新合进同一条排队记录(防抖)。
+
+const up = await pgAvailable();
+const enc = (s: string) => new TextEncoder().encode(s);
+const VIDEO = "Movies/奥本海默 (2023)/Oppenheimer.2023.1080p.mkv";
+const DIR = "Movies/奥本海默 (2023)";
+const NFO = `${DIR}/Oppenheimer.2023.1080p.nfo`;
+type Final = { value: unknown; source: string; locked: boolean };
+
+describe.skipIf(!up)("改映射后不再新旧混写:清字段 → 刷新 → 更新模式重刮", () => {
+  let h: Harness;
+  let tmdb: MockTmdb;
+  let lib: TempTree;
+  let d: AoDeps;
+  let id = "";
+  const actor = { type: "user" as const, id: "tester" };
+  const enqueueOpts: { task: string; availableAt?: Date | undefined }[] = [];
+
+  beforeAll(async () => {
+    // 沙丘 2 补一张海报,验证改映射后海报换成新作品的
+    const fixtures = TMDB_FIXTURES.map((f) => (f.id === 693134 ? { ...f, poster_path: "/dune.jpg" } : f));
+    tmdb = await createMockTmdb({ fixtures });
+    h = await createHarness("idrescrape", { tmdbUrl: tmdb.url });
+    lib = await createTempTree({ [VIDEO]: 1000 }, { sentinel: true, prefix: "umt-idscr-" });
+    const orig = h.engine.enqueue.bind(h.engine);
+    h.engine.enqueue = async (task, input, o) => {
+      enqueueOpts.push({ task, availableAt: o.availableAt });
+      return orig(task, input, o);
+    };
+    d = {
+      ctx: h.ctx,
+      ports: {
+        now: () => new Date(),
+        scrapeImage: async (p: string) => ({ content: enc(p), mime: "image/jpeg" }),
+        scrapeTmdbDetail: async () => null,
+        scrapeTmdbSeason: async () => null,
+      } as unknown as AoPorts,
+    };
+  }, 60_000);
+  afterAll(async () => {
+    await h?.close();
+    await tmdb?.close();
+    await lib?.cleanup();
+  });
+
+  const queuedUpdates = () =>
+    h.db
+      .selectFrom("scrape_record")
+      .select(["id", "mode", "trigger", "status"])
+      .where("media_entity_id", "=", id)
+      .where("status", "=", "queued")
+      .execute();
+
+  it("先按奥本海默建档、刷新、刮削;没刮削过时刷新不排重刮", async () => {
+    const r = await createEntityFromTmdbCandidate(
+      h.db,
+      () => h.rt.tmdb(),
+      { externalId: "872585", kind: "movie" },
+      actor,
+    );
+    id = r.mediaEntityId;
+    expect((await refreshMetadata(h.rt, id, { full: true })).status).toBe("refreshed");
+    expect(h.engine.enqueued.some((x) => x.task === SCRAPE_TASK)).toBe(false);
+    await setFieldOverride(h.rt, id, "tagline", { value: "我的标语", lock: true }, actor);
+
+    const root = await h.db
+      .insertInto("library_root")
+      .values({ name: "lib-idscr", media_kind: "mixed", local_path: lib.root, management_mode: "managed" })
+      .returning("id")
+      .executeTakeFirstOrThrow();
+    const asset = await h.db
+      .insertInto("media_asset")
+      .values({ media_entity_id: id, kind: "video" })
+      .returning("id")
+      .executeTakeFirstOrThrow();
+    await h.db
+      .insertInto("asset_location")
+      .values({ media_asset_id: asset.id, library_root_id: root.id, relative_path: VIDEO })
+      .execute();
+
+    const q = await scrapeEntity(d, id, { trigger: "manual" });
+    expect(q).toHaveLength(1);
+    const rec = await runScrapeRecord(d, q[0]!.recordId);
+    expect(rec).toMatchObject({ status: "succeeded", mode: "update" });
+    expect(rec.files.every((f) => f.action !== "written" || /^[0-9a-f]{64}$/.test(f.hash ?? ""))).toBe(true);
+    const nfo = await readFile(join(lib.root, NFO), "utf8");
+    expect(nfo).toContain("<title>奥本海默</title>");
+    expect(nfo).toContain("tt15398776");
+    expect(nfo).toContain("<tagline>我的标语</tagline>");
+    expect(await readFile(join(lib.root, DIR, "poster.jpg"), "utf8")).toBe("/oppenheimer.jpg");
+  }, 60_000);
+
+  it("改映射到沙丘 2:tmdb 来源字段清空,锁定字段保留,排 full 刷新", async () => {
+    const before = h.engine.enqueued.length;
+    const r = await setEntityIdentity(
+      h.rt,
+      id,
+      { provider: "tmdb", entityType: "movie", externalId: "693134", lock: true },
+      actor,
+    );
+    expect(r.changed).toBe(true);
+    const e = await h.db.selectFrom("media_entity").select(["metadata"]).where("id", "=", id).executeTakeFirstOrThrow();
+    const meta = e.metadata as Record<string, Final>;
+    expect(meta.overview).toBeUndefined();
+    expect(meta.posterPath).toBeUndefined();
+    expect(meta.externalIds).toBeUndefined();
+    expect(meta.tagline).toMatchObject({ value: "我的标语", locked: true });
+    const tmdbRows = await h.db
+      .selectFrom("metadata_field")
+      .select("field")
+      .where("media_entity_id", "=", id)
+      .where("source", "=", "tmdb")
+      .execute();
+    expect(tmdbRows).toEqual([]);
+    expect(h.engine.enqueued.slice(before)).toEqual([
+      expect.objectContaining({ task: "refreshMetadata", input: { mediaEntityId: id, full: true } }),
+    ]);
+  });
+
+  it("刷新后延后排一次更新模式重刮;期间再刷新合进同一条", async () => {
+    const t0 = Date.now();
+    expect((await refreshMetadata(h.rt, id, { full: true })).status).toBe("refreshed");
+    const queued = await queuedUpdates();
+    expect(queued).toEqual([expect.objectContaining({ mode: "update", trigger: "auto" })]);
+    const opt = enqueueOpts.filter((x) => x.task === SCRAPE_TASK).at(-1);
+    expect(opt?.availableAt?.getTime()).toBeGreaterThanOrEqual(t0 + RESCRAPE_DELAY_MS - 1000);
+
+    // 防抖:还没开始时再来一次刷新(哪怕字段又变了)不另建记录、不另排任务
+    await h.db
+      .updateTable("metadata_field")
+      .set({ value: JSON.stringify("旧值") })
+      .where("media_entity_id", "=", id)
+      .where("field", "=", "overview")
+      .execute();
+    const scrapes = h.engine.enqueued.filter((x) => x.task === SCRAPE_TASK).length;
+    await refreshMetadata(h.rt, id, { full: true });
+    expect(await queuedUpdates()).toHaveLength(1);
+    expect(h.engine.enqueued.filter((x) => x.task === SCRAPE_TASK).length).toBe(scrapes);
+  }, 60_000);
+
+  it("重刮后 NFO 的标题 / 简介 / IMDb / 海报都是沙丘 2,不残留奥本海默;锁定字段照写", async () => {
+    const [q] = await queuedUpdates();
+    const rec = await runScrapeRecord(d, q!.id);
+    expect(rec.status).toBe("succeeded");
+    expect(rec.files.find((f) => f.role === "movie_nfo")).toMatchObject({ action: "written" });
+    const nfo = await readFile(join(lib.root, NFO), "utf8");
+    expect(nfo).toContain("<title>沙丘2</title>");
+    expect(nfo).toContain("<tmdbid>693134</tmdbid>");
+    expect(nfo).toContain("tt15239678");
+    expect(nfo).not.toContain("tt15398776");
+    expect(nfo).not.toContain("奥本海默");
+    expect(nfo).not.toContain("原子弹之父");
+    expect(nfo).toContain("<tagline>我的标语</tagline>");
+    expect(await readFile(join(lib.root, DIR, "poster.jpg"), "utf8")).toBe("/dune.jpg");
+
+    // 字段没变的刷新不再排重刮
+    const scrapes = h.engine.enqueued.filter((x) => x.task === SCRAPE_TASK).length;
+    await refreshMetadata(h.rt, id, { full: true });
+    expect(h.engine.enqueued.filter((x) => x.task === SCRAPE_TASK).length).toBe(scrapes);
+  }, 60_000);
+});
diff --git a/apps/web/app/components/files/dialogs.tsx b/apps/web/app/components/files/dialogs.tsx
index 9d026129..1005a0ff 100644
--- a/apps/web/app/components/files/dialogs.tsx
+++ b/apps/web/app/components/files/dialogs.tsx
@@ -1093,8 +1093,8 @@ const SKIP_TEXT: Record<string, string> = {
 export function ScrapeDialog({ items, root, onClose }: { items: FileEntry[]; root: FileRoot; onClose: () => void }) {
   const settings = useSettings();
   const scrape = useScrape();
-  const [mode, setMode] = useState<"missing" | "overwrite" | null>(null);
-  const curMode = mode ?? settings.data?.organize.scrapeMode ?? "missing";
+  const [mode, setMode] = useState<"missing" | "overwrite" | "update" | null>(null);
+  const curMode = mode ?? settings.data?.organize.scrapeMode ?? "update";
   const [recordIds, setRecordIds] = useState<string[]>([]);
   const [choices, setChoices] = useState<FilesScrapeNeedsChoice[]>([]);
   const [picked, setPicked] = useState<Record<string, WizardEntity | null>>({});
@@ -1157,6 +1157,7 @@ export function ScrapeDialog({ items, root, onClose }: { items: FileEntry[]; roo
               <fieldset aria-label="已有文件" className="m-0 flex flex-wrap gap-1.5 border-0 p-0">
                 {(
                   [
+                    ["update", "更新"],
                     ["missing", "只补缺失"],
                     ["overwrite", "全部覆盖"],
                   ] as const
diff --git a/apps/web/app/components/files/mock.ts b/apps/web/app/components/files/mock.ts
index 9640bd45..a9284f3c 100644
--- a/apps/web/app/components/files/mock.ts
+++ b/apps/web/app/components/files/mock.ts
@@ -704,7 +704,7 @@ let seq = 0;
 const SCRAPES = new Map<string, ScrapeRecord>();
 function mockScrape(b: {
   items: { root: string; path: string; mediaEntityId?: string; external?: { externalId: string } }[];
-  mode?: "missing" | "overwrite";
+  mode?: "missing" | "overwrite" | "update";
 }) {
   const records: ScrapeRecord[] = [];
   const needsChoice: unknown[] = [];
diff --git a/apps/web/app/components/library/scrape-panel.tsx b/apps/web/app/components/library/scrape-panel.tsx
index e27eadae..fe6e0429 100644
--- a/apps/web/app/components/library/scrape-panel.tsx
+++ b/apps/web/app/components/library/scrape-panel.tsx
@@ -70,7 +70,7 @@ function FileRow({ f }: { f: ScrapeFileResult }) {
         )}
       </span>
       <span className="text-meta text-muted-foreground">{ROLE[f.role] ?? f.role}</span>
-      {f.action !== "written" && f.reason && f.reason !== "scrape_exists" ? (
+      {f.action !== "written" && f.reason && !QUIET_SKIPS.has(f.reason) ? (
         <span className={f.action === "failed" ? "text-meta text-destructive" : "text-meta text-muted-foreground"}>
           {reasonLine(f.reason, "写入失败")}
         </span>
@@ -80,11 +80,14 @@ function FileRow({ f }: { f: ScrapeFileResult }) {
   );
 }
 
+/** 不必逐条列出的跳过:已存在(不是本工具写的 / 只补缺失)、内容没变 */
+const QUIET_SKIPS = new Set(["scrape_exists", "scrape_unchanged"]);
+
 /** 一条刮削记录:状态、目录与识别结果、计数、逐文件结果(缺省不列"已存在"跳过的) */
 export function ScrapeRecordView({ record: s, showPath = false }: { record: ScrapeRecord; showPath?: boolean }) {
   const [showAll, setShowAll] = useState(false);
   const files = s.files;
-  const important = files.filter((f) => f.action !== "skipped" || f.reason !== "scrape_exists");
+  const important = files.filter((f) => f.action !== "skipped" || !QUIET_SKIPS.has(f.reason ?? ""));
   const shown = showAll ? files : important.slice(0, 12);
   const hidden = files.length - shown.length;
   const done = s.status !== "queued" && s.status !== "running";
diff --git a/apps/web/app/components/settings/library.tsx b/apps/web/app/components/settings/library.tsx
index b3db685b..dfdf130d 100644
--- a/apps/web/app/components/settings/library.tsx
+++ b/apps/web/app/components/settings/library.tsx
@@ -57,10 +57,11 @@ const SCRAPE_CARD: CardSpec = {
       label: "已有文件",
       kind: "select",
       options: [
+        { value: "update", label: "更新" },
         { value: "missing", label: "只补缺失" },
         { value: "overwrite", label: "全部覆盖" },
       ],
-      hint: "全部覆盖会替换目录里已有的 NFO 和图片，包括其他工具写的",
+      hint: "更新只替换本工具写过、之后没被改过的文件；全部覆盖会替换目录里已有的 NFO 和图片，包括其他工具写的",
     },
     {
       name: "organize.scrapeImages",
@@ -84,13 +85,16 @@ const SCRAPE_CARD: CardSpec = {
   toPatch: (v) => ({
     organize: {
       scrapeAfterImport: v["organize.scrapeAfterImport"] === true,
-      scrapeMode: str(v["organize.scrapeMode"]) === "overwrite" ? "overwrite" : "missing",
+      scrapeMode: scrapeModeOf(str(v["organize.scrapeMode"])),
       scrapeImages: v["organize.scrapeImages"] === true,
       scrapeEpisodeThumbs: v["organize.scrapeEpisodeThumbs"] === true,
     },
   }),
 };
 
+const scrapeModeOf = (v: string | null | undefined): "missing" | "overwrite" | "update" =>
+  v === "overwrite" || v === "missing" ? v : "update";
+
 export function LibrarySection() {
   return (
     <div className="grid grid-cols-1 gap-8">
diff --git a/docs/design/glossary.md b/docs/design/glossary.md
index 51a1d6c4..3ea16490 100644
--- a/docs/design/glossary.md
+++ b/docs/design/glossary.md
@@ -25,7 +25,7 @@
 | AcquisitionPlan(下载计划,DL-3 起界面不单独命名) | 下载;还没提交到下载器的按在等什么写状态:「等你批准」「等磁盘空间」「等开启自动化」「准备提交」;没提交就结束的写「没提交成功 / 已取消 / 已过期」+ 原因;来由写「为什么下这个」;智能体动作计数写"准备下载 N 个资源" | 下载计划、草稿、已预留(界面) |
 | DownloadTask | 下载任务 | 下载单 |
 | Organization record | 整理记录;动作叫"整理",结果状态叫"已入库" | 转移、入库记录 |
-| 在目录里就地写 NFO 与图片(scrapeMedia,SCR-1 / SCR-2) | 刮削;文件管理菜单「刮削…」,作品详情「重新刮削」「覆盖重写」;覆盖方式叫「只补缺失 / 全部覆盖」;认不准作品时"选一个再刮削";只更新本工具字段的叫「刷新元数据」 | 投影、NFO 投影、写元数据(界面) |
+| 在目录里就地写 NFO 与图片(scrapeMedia,SCR-1 / SCR-2) | 刮削;文件管理菜单「刮削…」,作品详情「重新刮削」「覆盖重写」;覆盖方式叫「更新 / 只补缺失 / 全部覆盖」(更新 = 只替换本工具写过且没被改过的文件);认不准作品时"选一个再刮削";只更新本工具字段的叫「刷新元数据」 | 投影、NFO 投影、写元数据(界面) |
 | 整理方式 | 复制 / 移动 / 硬链接 | Copy / Move |
 | Library root | 媒体库目录 | 库根、媒体库根、根目录 |
 | 文件管理可浏览的目录(库根 + 下载器路径映射) | 登记目录 | 登记根、根 |
diff --git a/docs/porting/moviepilot-metadata-recognition.md b/docs/porting/moviepilot-metadata-recognition.md
index 27d25755..96f69731 100644
--- a/docs/porting/moviepilot-metadata-recognition.md
+++ b/docs/porting/moviepilot-metadata-recognition.md
@@ -426,13 +426,17 @@ export interface TmdbPort { searchMovie(q: string, year?: number): Promise<TmdbS
 
 ## 10. 刮削（NFO、图片）
 
-| 上游 | 行为 | 本项目 |
+按 2026-10 的实现改写；细节与排查见 `docs/runbook/scrape.md`。
+
+| 上游 | 行为 | 本项目（现状） |
 | --- | --- | --- |
-| `app/chain/scraping.py:148 ScrapingOption`、`:243 get_default_config` | 按 `(movie|tv|season|episode)_(nfo|poster|backdrop|logo|disc|banner|thumb|clearart|landscape)` 逐项配置策略 `skip/missingonly/overwrite/upgrade`，默认 `missingonly` | 保留"逐项策略"的结构，放在 `policy_revision` 下的目录策略中（REQ §14.1.3："NFO/海报写入受目录策略控制"） |
-| `:320 _should_scrape` | skip 时不写；文件不存在时写；文件存在时，只有 overwrite 或全局 overwrite 才写 | 保留；另外增加一条：**用户或其他工具已修改的 NFO（含 `<lockdata>true` 或 hash 与上次写入不一致）不覆盖** |
-| `:356 _save_file` | 先写临时文件，chmod `0666 & ~umask`，再经存储链上传 | 保留"临时文件加原子替换" |
-| `app/modules/themoviedb/scraper.py:35 get_metadata_nfo` | 电影、剧、季、集四种 NFO；季和集走 `get_tv_season_detail`，有剧集组时走 `get_tv_group_detail`；标签包括 `uniqueid(tmdb default, imdb, tvdb)`、`plot`、`genre`、`actor`、`director`、`studio`、`country`、`mpaa`、`rating`、`runtime` | `packages/adapters/src/nfo/writer.ts` 输出 Kodi/Emby 兼容 NFO；**另写一个 `uniqueid type="uhd"`，内容为本地 UUID** |
-| 失败语义 | 刮削在整理后执行，失败只记日志，不回滚转移 | 保留"不重做搬运"；改为**独立任务 `refreshMetadata`，有自己的状态和重试**，不能伪报全部步骤成功（REQ §14.1.3） |
+| `app/chain/scraping.py:148 ScrapingOption`、`:243 get_default_config` | 按 `(movie\|tv\|season\|episode)_(nfo\|poster\|backdrop\|…)` 逐项配置策略 `skip/missingonly/overwrite/upgrade`，默认 `missingonly` | 没有逐项策略，只有全局覆盖方式 `organize.scrapeMode`：`update` 更新（缺省）/ `missing` 只补缺失 / `overwrite` 全部覆盖；图片与剧照各有一个开关 |
+| `:320 _should_scrape` | skip 时不写；文件不存在时写；文件存在时，只有 overwrite 或全局 overwrite 才写 | `missing` / `overwrite` 同 MP。新增 `update`：每次写入在 `scrape_record.files[].hash` 记内容 sha256，目标存在且与本工具上次写入的 hash 一致（没被改过）才用新内容覆盖，内容没变不重写；被改过的跳过（`scrape_user_modified`），不是本工具写的跳过（`scrape_exists`）；旧版本没有 hash 的记录按修改时间兜底。**不读 `<lockdata>`，也不写它** |
+| `:356 _save_file` | 先写临时文件，chmod `0666 & ~umask`，再经存储链上传 | 同目录临时文件 + rename（`services/scrape.ts` `atomicWrite`），目标必须在登记目录内 |
+| `app/modules/themoviedb/scraper.py:35 get_metadata_nfo` | 电影、剧、季、集四种 NFO；标签包括 `uniqueid(tmdb default, imdb, tvdb)`、`plot`、`genre`、`actor`、`director`、`studio`、`country`、`mpaa`、`rating`、`runtime` | `packages/domain/src/scrape/nfo.ts`（纯函数，与 MP 元素顺序一致，金样差分 `apps/server/test/scrape/nfo-mp-diff.test.ts`，偏离登记 `nfo-deviations.json`）；`uniqueid` 只有 tmdb / imdb / tvdb / douban，**没有 `type="uhd"`**；不写 `mpaa`、`episodeguide`、`lockdata`。合集 / 其他类作品按电影写（根元素 `<movie>`，判定函数 `scrapeKindOf`） |
+| 季 / 集元数据 | `get_tv_season_detail` 现取；集名缺时写占位 | 本地作品用投影后的季 / 集字段；单元缺元数据时按 TMDB id 现取季详情补齐，仍缺则该文件跳过（`scrape_metadata_missing`）、记录 `partial`，**不写「季 N」「第 N 集」占位** |
+| 元数据变化后 | 不会自动重刮 | 刷新元数据后 NFO 相关字段有变化、且作品刮削过 → 延后 2 分钟排一次 `update` 模式重刮（同目录排队记录合批防抖）；改 TMDB 映射时先清旧作品的 tmdb 来源字段与没锁的 IMDb 映射，再 full 刷新，刷新后按同一规则重刮 |
+| 失败语义 | 刮削在整理后执行，失败只记日志，不回滚转移 | 不重做搬运；刮削是独立任务 `scrapeMedia`（不重试，失败的重新刮削），每次一条 `scrape_record`（逐文件结果与原因）；非写文件的意外错误记 `scrape_internal_error` 并保留已写文件结果 |
 
 ---
 
diff --git a/docs/runbook/scrape.md b/docs/runbook/scrape.md
index 09ec7125..752843eb 100644
--- a/docs/runbook/scrape.md
+++ b/docs/runbook/scrape.md
@@ -18,6 +18,8 @@ SCR-2(用户 2026-09-30:"已经有的也可以重新刮削……如果是直接
 | `apps/server/src/modules/file-manager/scrape.ts` | 文件管理「刮削」:按路径识别(复用 `identifyCore` + `resolveIdentity`)、候选、排任务、请求内等结果 |
 | `handlers.ts` 任务 `scrapeMedia`(v2,输入 `{recordId}`) | 文件道;不重试(失败的重新刮削) |
 | 迁移 `0058_scrape_record` | 每次刮削一条记录;替代 0057 的 `media_scrape`(一部作品一行) |
+| 迁移 `0070_scrape_update_mode` | `scrape_record.mode` 增加 `update`;逐文件 hash 记在 `files` jsonb 里,不加列 |
+| `sources-identity/service/metadata.ts` `refreshMetadata` / `clearTmdbMetadata` | 刷新后 NFO 字段有变化 → `scheduleEntityRescrape`;改 TMDB 映射时清旧字段(`identity-admin.ts` `setEntityIdentity` 调用) |
 | 端口 `AoPorts.scrapeImage` / `scrapeTmdbDetail` / `scrapeTmdbSeason` | 图片字节(图片缓存 `DATA_DIR/cache/images` + 出口代理);未登记目录直接取 TMDB 富详情 / 季详情(元数据语言链,经 TMDB 缓存) |
 
 ## 触发
@@ -27,9 +29,58 @@ SCR-2(用户 2026-09-30:"已经有的也可以重新刮削……如果是直接
 | 文件管理「刮削…」(右键 / ⋯ 菜单、多选批量栏、详情按钮) | `POST /files/scrape {items[{root,path,mediaEntityId?,external?}], mode?, addToLibrary?}`;任意视频文件或目录,每项一条记录,请求内最多等 `FILES_TRANSFER_WAIT_SEC`(缺省 20 s),没刮完的 `pending=true`,前端按 `GET /files/scrape-records?ids=` 轮询 |
 | 作品详情「重新刮削」「覆盖重写」 | `POST /library/{id}/scrape {mode?}`(202):对作品目录刮削,每个目录一条记录;没有已入库文件 412(到文件管理里对目录刮削) |
 | 整理入库成功(`finalizeRecord` 结果为已入库 / 部分入库) | 设置 `organize.scrapeAfterImport` 打开时对作品目录排刮削,幂等键 `scrapeMedia:record:<整理记录 id>:<序号>` |
+| 元数据刷新后 NFO 字段有变化 | 只对刮削过的作品(有成功 / 部分成功的记录):对作品目录排「更新」模式刮削(`trigger=auto`),任务延后 2 分钟开始;见下「刷新后自动重刮」 |
+| 改作品的 TMDB 映射 | 清掉旧作品的 tmdb 来源字段 → 排 full 刷新(幂等键 `refreshMetadata:identity:<新身份 id>`)→ 刷新写回新字段后按上一行自动重刮 |
 
 同一目录已有排队中(未开始,30 分钟内)、同覆盖方式、同作品的刮削时直接复用(`deduplicated`)。
 
+### 覆盖方式
+
+| 方式 | 目标不存在 | 目标存在 |
+| --- | --- | --- |
+| `update` 更新(缺省) | 写 | 本工具上次写入、之后没被改过 → 按新内容覆盖(内容没变就不重写,记 `scrape_unchanged`);被改过 → 跳过 `scrape_user_modified`;不是本工具写的 → 跳过 `scrape_exists` |
+| `missing` 只补缺失 | 写 | 跳过 `scrape_exists` |
+| `overwrite` 全部覆盖 | 写 | 覆盖(包括其他工具写的、人改过的) |
+
+- 每次写入(任何方式)在该记录的逐文件结果里记内容的 sha256(`files[].hash`);「更新」时取同一登记目录里以前的记录,
+  每个路径按从新到旧第一条带 hash 的结果,与磁盘上现在的内容比对。跳过的结果不带 hash,人改过的文件以后每次都还是跳过,
+  要替换就用「全部覆盖」。
+- 旧版本写的文件没有 hash:修改时间不晚于那次刮削结束(留 2 秒余量)就当没被改过。
+- 已存在的目标是目录 / 符号链接时三种方式都跳过。
+- 更新不删除文件:改身份后新作品没有背景图时,旧的 `fanart.jpg` 留在目录里(元数据里旧的背景图路径已清掉,不会再写旧图)。
+
+### 刷新后自动重刮
+
+- `refreshMetadata` 结束后,作品写进 NFO 的字段(标题、原名、年份、简介、标语、首映、类型、制片国、平台、时长、演职员、外部 ID、海报、背景图)
+  或季 / 集的名称、简介、日期、时长、剧照、季海报有变化时,调 `scheduleEntityRescrape`。评分、票数、播出状态的变化不触发(避免每天刷新都改写 NFO,
+  下次因为别的原因重刮时会带上新评分)。
+- 没刮削过的作品不排(要先手动或入库后刮一次)。
+- 防抖:任务带 `availableAt = 现在 + 2 分钟`;这段时间里再来的刷新命中同目录、同作品、`update` 方式的排队记录直接复用,不另排。
+- 排上的记录在作品详情「刮削」卡片里显示为「入库后自动」那一类(`trigger=auto`)、方式 `update`。
+
+### 改 TMDB 映射(纠错)后
+
+`setEntityIdentity`(作品页改映射、`POST /media-entities/{id}/identities`)在同一事务里:
+
+1. 旧映射退役、新映射接受(原有逻辑);
+2. 旧 TMDB 带出来的 IMDb 映射(没人工锁的)一并退役——NFO 里 IMDb 是 default uniqueid,留着媒体服务器会认成旧作品;
+3. 清掉该作品及其季 / 集单元的 tmdb 来源字段(`metadata_field` 与投影出的最终值;单元的 `title` / `air_date` 列跟着清),
+   人工覆盖、锁定字段和 web / agent 补全字段保留;海报 / 背景图一并清掉,不再按「TMDB 没有时保留旧值」留旧作品的图。
+
+提交后排 full 刷新;刷新填回新作品字段后自动重刮(上一节),本工具写过且没被改过的 NFO 和图片换成新作品的。
+刷新完成前若刚好有刮削在跑,季 / 集缺元数据的部分会按下一节跳过,不会写进旧作品的内容。
+
+### 季 / 集缺元数据
+
+本地作品有元数据时用最终字段;季单元或要刮的集单元**缺元数据**(没有单元,或从没被元数据来源填过、也没有标题 / 播出日期,
+典型是整理懒建的集、改身份后被清空的单元)时,先按作品的 TMDB id 现取该季详情补齐(映射同刷新元数据,只补缺的单元,本地已有的字段不动,
+不落库)。仍然缺(没有 TMDB id、季详情失败、TMDB 没有这一集)时:
+
+- 该季 `season.nfo` / 该集 NFO 跳过,原因 `scrape_metadata_missing`,**不写「季 N」「第 N 集」占位**;
+- 记录状态是 `partial`(原因 `scrape_metadata_missing`),不再报成功;刷新元数据后会自动重刮(上一节),或手动重新刮削。
+
+TMDB 有这一集但没有译名 / 简介(只有占位名和播出日期)不算缺,照常写(和 MP 一样)。未登记目录直接取 TMDB 时同一规则:季详情失败的季跳过。
+
 ### 识别(文件管理)
 
 顺序:请求指定 > 目录里已登记文件所属的唯一作品(`source=library`)> 按路径识别(`source=auto`)。
@@ -53,6 +104,8 @@ SCR-2(用户 2026-09-30:"已经有的也可以重新刮削……如果是直接
 - 集号:已登记视频按覆盖的集单元;其余按路径解析(季号缺失时取季目录名,再缺按第 1 季;同 MP 对每集重新 `MetaInfoPath`)。
   认不出集号的视频记 `scrape_no_episode` 跳过。多集文件按首集。
 - 字段:本地作品有元数据时用最终字段(字段锁、人工覆盖优先,见 `metadata.md`);否则按 TMDB id 直接取 TMDB(与刷新元数据同一映射)。
+  TMDB id 只认与刮削类型一致的映射(同一作品同时有 movie / tv 两个 accepted 映射时不串)。
+- 作品类型:剧集 / 综艺按剧集刮,电影 / 合集 / 其他按电影刮(`<视频名>.nfo`,根元素 `<movie>`),范围判定与 NFO 生成同一个函数 `scrapeKindOf`。
 - 登记目录:库根只写 `managed`(只登记模式跳过 `scrape_root_read_only`),库根离线 / 标记文件不对 `scrape_root_offline`;
   下载根也能刮削(同 MP)。目标路径必须在登记目录内;已存在的目标是目录 / 符号链接时跳过。
 
@@ -97,7 +150,8 @@ SCR-2(用户 2026-09-30:"已经有的也可以重新刮削……如果是直接
 
 | 项 | MP | 我们 | 理由 |
 | --- | --- | --- | --- |
-| 已有文件 | 手动刮削一律覆盖(`overwrite=True`),自动刮削按每类文件的策略 | 缺省按设置「只补缺失 / 全部覆盖」,刮削对话框里可临时改 | 用户要求覆盖方式沿用设置、菜单里可临时选;缺省不动其他工具写的文件 |
+| 已有文件 | 手动刮削一律覆盖(`overwrite=True`),自动刮削按每类文件的策略 | 缺省「更新」(只覆盖本工具写过且没被改过的,按 hash 判断),也可选「只补缺失 / 全部覆盖」,刮削对话框里可临时改 | 元数据纠正后已有 NFO 要能跟着更新,又不能覆盖用户手改的、其他工具写的 |
+| 季 / 集缺元数据 | 写占位(「第 N 集」) | 现取季详情补齐,仍缺跳过并记 partial | 占位 NFO 在「只补缺失」下永远不会被替换 |
 | 识别 | 按路径识别,认不出直接失败;对话框可手填 TMDB / 豆瓣 id | 按路径识别,认不准时返回前 5 候选让用户选(也可搜索);已登记的目录直接用作品 | 选一次比手填 id 省事;已登记的不必再识别 |
 | 执行 | 请求内同步 | 后台任务 `scrapeMedia`,请求内最多等 20 s | 大季包图片多;超时不丢 |
 | 记录 | 只有日志 | 每次刮削一条记录(目录、识别结果、逐文件结果、原因),作品详情显示最近一条 | 可回看、可排查 |
@@ -110,7 +164,7 @@ SCR-2(用户 2026-09-30:"已经有的也可以重新刮削……如果是直接
 | 字段 | 缺省 | 说明 |
 | --- | --- | --- |
 | `organize.scrapeAfterImport` | 关 | 入库后自动刮削(MP 目录「刮削」缺省同样关) |
-| `organize.scrapeMode` | `missing` | `missing` 只补缺失(MP「仅缺失」)/ `overwrite` 全部覆盖;手动刮削时对话框可临时改 |
+| `organize.scrapeMode` | `update` | `update` 更新 / `missing` 只补缺失(MP「仅缺失」)/ `overwrite` 全部覆盖,见上「覆盖方式」;手动刮削时对话框可临时改。以前保存过的 `missing` / `overwrite` 照旧生效,要用更新到设置里改 |
 | `organize.scrapeImages` | 开 | 海报、背景图、季海报 |
 | `organize.scrapeEpisodeThumbs` | 开 | 每集剧照;`scrapeImages` 关时不生效 |
 
@@ -121,8 +175,9 @@ SCR-2(用户 2026-09-30:"已经有的也可以重新刮削……如果是直接
 - 公共(电影 / 剧集):`tmdbid` + `uniqueid type=tmdb`;有 TVDB / IMDb 时追加(有 IMDb 时 IMDb 为 `default`);`plot` / `outline`(CDATA);
   `director`(带 `tmdbid`);`actor{name,type,role,tmdbid,thumb,profile}`;`genre`;`rating`(一位小数);`studio`;`country`;`runtime`;
   `title`、`originaltitle`、`premiered`、`year`;剧集另有 `season=-1`、`episode=-1`。
-- 季:`plot`、`outline`、`title`(没有时「季 N」)、`premiered`、`releasedate`、`year`、`seasonnumber`。
-- 集:`title`(没有或 TMDB 占位名时「第 N 集」)、`plot`、`outline`、`aired`、`year`、`season`、`episode`、`rating`。
+- 季:`plot`、`outline`、`title`(单元有简介 / 日期但没名称时「季 N」)、`premiered`、`releasedate`、`year`、`seasonnumber`。
+- 集:`title`(TMDB 占位名时「第 N 集」)、`plot`、`outline`、`aired`、`year`、`season`、`episode`、`rating`。
+  季 / 集单元整个缺元数据时不写(见「季 / 集缺元数据」)。
 - 取值:标题 / 简介 / 标语按元数据语言链(见 `metadata.md`);字段锁与人工覆盖优先(用的是投影后的最终值)。
 
 与 MP 的差异(差分登记 `apps/server/test/scrape/nfo-deviations.json`):
@@ -153,17 +208,20 @@ cd /opt/uhd_media_tool && deno run -A npm:@biomejs/biome check --write apps/serv
 - 作品详情「刮削」卡片:该作品最近一条刮削记录;排队或进行中时每 3 秒刷新。
 - `GET /files/scrape-records?ids=`、`GET /library/{id}` 的 `scrape`:`id`、`root`、`path`、`status`、`trigger`、`mode`、
   `match{mediaEntityId, provider, externalId, kind, title, year, source}`、`written` / `skipped` / `failed`、`reason`、
-  `files[{path, kind, role, action, reason}]`(path 为登记目录内相对路径)、`organizationRecordId`、`taskId`。
+  `files[{path, kind, role, action, reason, hash}]`(path 为登记目录内相对路径;hash 为写入时内容的 sha256)、`organizationRecordId`、`taskId`。
 - 审计 `organize.scrape`(目标 `scrape_record`;载荷含目录、识别结果、写入与失败的文件,最多 200 条);写入后发 `files.changed`,文件管理自动刷新。
 - 原因码(`packages/contracts/src/reasons.ts`):`scrape_no_metadata`、`scrape_root_read_only`、`scrape_root_offline`、`scrape_not_video`、
-  `scrape_no_videos`、`scrape_path_missing`、`scrape_tmdb_unavailable`、`scrape_no_episode`、`scrape_exists`、`scrape_write_failed`、
-  `scrape_image_failed`、`path_escape`、`task_enqueue_failed`。
+  `scrape_no_videos`、`scrape_path_missing`、`scrape_tmdb_unavailable`、`scrape_no_episode`、`scrape_exists`、`scrape_unchanged`、
+  `scrape_user_modified`、`scrape_metadata_missing`、`scrape_write_failed`、`scrape_image_failed`、`scrape_internal_error`(查库等非写文件错误,
+  已写的文件结果保留)、`path_escape`、`task_enqueue_failed`。
 
 | 现象 | 看哪里 |
 | --- | --- |
 | 入库后没有 NFO | 设置里「入库后自动刮削」是否打开;作品详情「刮削」是否有记录;引擎运行 `scrapeMedia` |
 | 刮削对话框一直让选作品 | 文件名解析不出标题,或 TMDB 有多个同名候选;选一次即可,打开「同时加入媒体库」后下次按已入库作品识别 |
-| 全部「跳过」 | 覆盖方式是只补缺失;要替换选「全部覆盖」或作品详情「覆盖重写」 |
+| 全部「跳过」 | 覆盖方式是只补缺失,或更新时文件不是本工具写的 / 被人改过(`scrape_exists` / `scrape_user_modified`);要替换选「全部覆盖」或作品详情「覆盖重写」 |
+| 改了映射 / 刷新了元数据,NFO 没变 | 作品以前没刮削过(不自动重刮);重刮任务要等 2 分钟;NFO 被人改过(`scrape_user_modified`) |
+| 记录「部分成功」、原因缺元数据 | 季 / 集还没取到元数据且 TMDB 季详情取不到;刷新元数据(作品详情「刷新」带 full)后会自动重刮 |
 | 图片失败、NFO 正常 | TMDB 图片访问(出口代理);稍后重新刮削,只补缺失的图片 |
 | 「没有可用的元数据」 | 作品没有 TMDB 字段也没有 TMDB id;在文件管理里刮削并指定 TMDB 条目 |
 | 「TMDB 不可用」 | 设置里 TMDB API Key;未登记的目录要直接取 TMDB |
diff --git a/packages/contracts/src/reasons.ts b/packages/contracts/src/reasons.ts
index 102e6b52..fd624f6c 100644
--- a/packages/contracts/src/reasons.ts
+++ b/packages/contracts/src/reasons.ts
@@ -108,7 +108,11 @@ const REASONS: Record<string, ReasonText> = {
   task_enqueue_failed: { text: "后台任务没排上", action: "稍后重试" },
   scrape_no_videos: { text: "目录里没有视频", action: "对作品或季目录刮削" },
   scrape_tmdb_unavailable: { text: "TMDB 不可用", action: "检查 TMDB 设置后重新刮削" },
-  scrape_exists: { text: "文件已存在，只补缺失时不改" },
+  scrape_exists: { text: "文件已存在，不是本工具写的或只补缺失时不改" },
+  scrape_unchanged: { text: "内容没有变化" },
+  scrape_user_modified: { text: "文件写入后被改过，更新时不覆盖", action: "要替换就选全部覆盖重新刮削" },
+  scrape_metadata_missing: { text: "缺少这一季或这一集的元数据，没有写占位文件", action: "刷新元数据后重新刮削" },
+  scrape_internal_error: { text: "刮削过程中出错", action: "查看日志后重新刮削" },
   scrape_write_failed: { text: "写入目录失败", action: "检查目录权限后重新刮削" },
   scrape_image_failed: { text: "图片没下载成功", action: "稍后重新刮削" },
   scrape_no_episode: { text: "文件名里认不出集号" },
diff --git a/packages/contracts/src/scrape.ts b/packages/contracts/src/scrape.ts
index a8725a39..d5c9ec09 100644
--- a/packages/contracts/src/scrape.ts
+++ b/packages/contracts/src/scrape.ts
@@ -14,11 +14,16 @@ export const ScrapeFileResult = z.object({
   action: z.enum(["written", "skipped", "failed"]),
   /** 跳过 / 失败原因码(reasons.ts:scrape_exists / scrape_write_failed / scrape_image_failed …) */
   reason: z.string().nullable(),
+  /** 本工具写入(或核对未变)时文件内容的 sha256;「更新」模式据此判断文件之后有没有被人改过 */
+  hash: z.string().nullable().optional(),
 });
 export type ScrapeFileResult = z.infer<typeof ScrapeFileResult>;
 
-/** missing = 只补缺失;overwrite = 全部覆盖 */
-export const ScrapeMode = z.enum(["missing", "overwrite"]);
+/**
+ * missing = 只补缺失;overwrite = 全部覆盖;
+ * update = 更新(缺省):不存在的写入,本工具上次写入且没被改过的用新内容覆盖,被改过 / 不是本工具写的不动
+ */
+export const ScrapeMode = z.enum(["missing", "overwrite", "update"]);
 export type ScrapeMode = z.infer<typeof ScrapeMode>;
 
 export const ScrapeStatus = z.enum(["queued", "running", "succeeded", "partial", "failed"]);
diff --git a/packages/contracts/src/settings.ts b/packages/contracts/src/settings.ts
index be6c8aa0..3f810a2b 100644
--- a/packages/contracts/src/settings.ts
+++ b/packages/contracts/src/settings.ts
@@ -78,8 +78,11 @@ export const OrganizeSettings = z.object({
   minSizeBytes: z.number().int().nonnegative(),
   /** SCR-1:整理入库成功后自动刮削(往媒体库目录写 NFO 与图片);缺省关(同 MP 目录「刮削」缺省) */
   scrapeAfterImport: z.boolean(),
-  /** SCR-1:目标文件已存在时 missing = 只补缺失(MP「仅缺失」)/ overwrite = 全部覆盖 */
-  scrapeMode: z.enum(["missing", "overwrite"]),
+  /**
+   * 目标文件已存在时:update = 更新(缺省;只覆盖本工具写过且没被改过的文件)/ missing = 只补缺失(MP「仅缺失」)/
+   * overwrite = 全部覆盖
+   */
+  scrapeMode: z.enum(["missing", "overwrite", "update"]),
   /** SCR-1:下载海报、背景图、季海报 */
   scrapeImages: z.boolean(),
   /** SCR-1:下载每集剧照(`<视频名>-thumb.jpg`) */
@@ -642,7 +645,7 @@ export const DEFAULT_SETTINGS: GlobalSettings = {
     allowCrossVolumeMove: true,
     minSizeBytes: 50 * 1024 * 1024,
     scrapeAfterImport: false,
-    scrapeMode: "missing",
+    scrapeMode: "update",
     scrapeImages: true,
     scrapeEpisodeThumbs: true,
   },
diff --git a/packages/db/migrations/0070_scrape_update_mode.ts b/packages/db/migrations/0070_scrape_update_mode.ts
new file mode 100644
index 00000000..0d95c14e
--- /dev/null
+++ b/packages/db/migrations/0070_scrape_update_mode.ts
@@ -0,0 +1,23 @@
+import type { Kysely } from "kysely";
+import { execDdl, oneOf } from "../src/migration-helpers.ts";
+
+// 刮削覆盖策略加「更新」(update):只覆盖本工具上次写入且之后没被改过的文件(按 scrape_record.files 里记的 hash 判断),
+// 被人改过的跳过(scrape_user_modified)。scrape_record.mode 的 CHECK 增加 update;逐文件 hash 放在 files jsonb 里,不加列。
+
+const OLD = ["missing", "overwrite"];
+const NEW = [...OLD, "update"];
+
+const swap = (values: readonly string[]) => `
+alter table scrape_record drop constraint if exists scrape_record_mode_check;
+alter table scrape_record add constraint scrape_record_mode_check ${oneOf("mode", values)};
+`;
+
+// biome-ignore lint/suspicious/noExplicitAny: 迁移不依赖应用表类型
+export async function up(db: Kysely<any>): Promise<void> {
+  await execDdl(db, swap(NEW));
+}
+
+// biome-ignore lint/suspicious/noExplicitAny: 同上
+export async function down(db: Kysely<any>): Promise<void> {
+  await execDdl(db, `update scrape_record set mode = 'missing' where mode = 'update'; ${swap(OLD)}`);
+}
diff --git a/packages/db/src/types.ts b/packages/db/src/types.ts
index 3f0a22ae..f94ac4d5 100644
--- a/packages/db/src/types.ts
+++ b/packages/db/src/types.ts
@@ -233,7 +233,7 @@ export type ScheduledJobRunTrigger = "schedule" | "manual" | "skip";
 export type ScheduledJobRunStatus = "ok" | "failed" | "skipped" | "running";
 export type ScrapeRecordStatus = "queued" | "running" | "succeeded" | "partial" | "failed";
 export type ScrapeRecordTrigger = "auto" | "manual";
-export type ScrapeRecordMode = "missing" | "overwrite";
+export type ScrapeRecordMode = "missing" | "overwrite" | "update";
 export type SecretPurpose =
   | "site_cookie"
   | "site_passkey"
diff --git a/packages/domain/src/scrape/layout.ts b/packages/domain/src/scrape/layout.ts
index 0b07f80b..69d84a70 100644
--- a/packages/domain/src/scrape/layout.ts
+++ b/packages/domain/src/scrape/layout.ts
@@ -10,6 +10,14 @@
 // 视频直接在库根(没有作品目录)时,电影图片改用 `<视频名>-poster.jpg` / `<视频名>-fanart.jpg`,
 // 剧集不写 tvshow / 季文件(不能往库根里放 tvshow.nfo)。
 
+/**
+ * 作品类型 → 刮削布局与 NFO 根元素:剧集 / 综艺按剧集(tvshow.nfo + 季 / 集),其余(电影、合集、其他)都按电影
+ * (`<视频名>.nfo`,根元素 `<movie>`)。刮削的范围判定与 NFO 生成都用这一个口径。
+ */
+export function scrapeKindOf(entityKind: string): "movie" | "tv" {
+  return entityKind === "series" || entityKind === "variety" || entityKind === "tv" ? "tv" : "movie";
+}
+
 /** 纯字符串的 POSIX dirname / basename / extname(domain 不依赖 node:path,前端也能打包) */
 const posix = {
   dirname(p: string): string {
diff --git a/packages/domain/test/scrape.test.ts b/packages/domain/test/scrape.test.ts
index 7b303e91..c9ae6ea3 100644
--- a/packages/domain/test/scrape.test.ts
+++ b/packages/domain/test/scrape.test.ts
@@ -4,6 +4,7 @@ import {
   inferWorkDir,
   isSeasonDirName,
   planScrapeTargets,
+  scrapeKindOf,
   seasonNfo,
   seasonOfDirName,
   seasonPosterName,
@@ -247,3 +248,10 @@ describe("刮削目标布局", () => {
     expect(ep.map((x) => x.role)).toEqual(["episode_nfo", "episode_thumb"]);
   });
 });
+
+describe("作品类型 → 刮削类型", () => {
+  it("剧集 / 综艺按剧集,电影 / 合集 / 其他按电影", () => {
+    expect(["series", "variety", "tv"].map(scrapeKindOf)).toEqual(["tv", "tv", "tv"]);
+    expect(["movie", "collection", "other"].map(scrapeKindOf)).toEqual(["movie", "movie", "movie"]);
+  });
+});