diff --git a/.env.example b/.env.example
index de591168..80b70f27 100644
--- a/.env.example
+++ b/.env.example
@@ -87,6 +87,15 @@ MATECLAW_OAUTH_OPENAI_CALLBACK_BIND_HOST=
 #     - /your/host/path:/data/wiki
 MATE_WIKI_ALLOWED_SOURCE_ROOTS=
 
+# ── Skill 工作区目录 ─────────────────────────────────────────────
+# 已安装的 skill、运行时积累的 LESSONS.md、skill 运行产物都落在这个目录。
+# 默认（容器内）已指向 /app/data/skills，由 docker-compose 的 server_data 卷
+# 持久化，容器重启不丢，无需额外挂卷。一般无需修改。
+# 内置 skill 由 JAR classpath 每次启动现场释放，挂空卷也不会丢内置文件。
+# 仅当你想把 skill 目录放到别处（如独立的 bind mount）时才覆盖此项，
+# 并记得在 docker-compose.yml 的 volumes 里把对应宿主机目录挂进容器。
+MATECLAW_SKILL_WORKSPACE_ROOT=
+
 # ── Maven 镜像（国内加速）─────────────────────────────────────────
 # 在中国大陆构建时取消注释，将 Aliyun 仓库优先级提前，大幅提速 mvn 拉包。
 # 空值（默认）使用 US Maven Central → Google CDN → Aliyun 的顺序。
diff --git a/docker-compose.yml b/docker-compose.yml
index 55df7c18..060cc464 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -100,6 +100,10 @@ services:
       # 示例：MATE_WIKI_ALLOWED_SOURCE_ROOTS=/data/wiki,/opt/docs
       # 记得同步在 volumes 里把宿主机路径挂进容器。
       MATE_WIKI_ALLOWED_SOURCE_ROOTS: ${MATE_WIKI_ALLOWED_SOURCE_ROOTS:-}
+      # Skill 工作区根目录。放在 /app/data 下，让现有的 server_data 卷一并持久化
+      # 已安装的 skill、运行时积累的 LESSONS.md 以及 skill 运行产物，容器重启不丢。
+      # 内置 skill 仍由 JAR classpath 每次启动现场释放，空卷不会丢内置文件。
+      MATECLAW_SKILL_WORKSPACE_ROOT: ${MATECLAW_SKILL_WORKSPACE_ROOT:-/app/data/skills}
     # Chromium needs a real /dev/shm. Docker defaults to 64MB which causes
     # SIGBUS / "Target page closed" errors under load. 2GB is the usual
     # recommendation for Playwright / headless chrome.
@@ -108,10 +112,11 @@ services:
       - "18080:18088"   # host:container — app listens on 18088 inside the container
       - "1455:1455"
     volumes:
+      # server_data covers /app/data — H2 DB, wiki-uploads, AND the skill
+      # workspace (MATECLAW_SKILL_WORKSPACE_ROOT=/app/data/skills above), so a
+      # single volume persists everything. No separate skills volume needed.
       - server_data:/app/data
-      - skills_data:/root/.mateclaw/skills
 
 volumes:
   mysql_data:
   server_data:
-  skills_data:
diff --git a/mateclaw-server/src/main/java/vip/mate/skill/installer/ZipSkillFetcher.java b/mateclaw-server/src/main/java/vip/mate/skill/installer/ZipSkillFetcher.java
index ef483df5..e1e8221f 100644
--- a/mateclaw-server/src/main/java/vip/mate/skill/installer/ZipSkillFetcher.java
+++ b/mateclaw-server/src/main/java/vip/mate/skill/installer/ZipSkillFetcher.java
@@ -29,6 +29,8 @@ import java.util.zip.ZipInputStream;
  *   <li>Zip Slip path traversal</li>
  *   <li>Per-file ≤1MB, total ≤50MB</li>
  *   <li>Only SKILL.md / references/ / scripts/ entries are kept</li>
+ *   <li>Binary entries are skipped with a WARN — bundle storage is text-only,
+ *       so decoding them as text would persist corrupted content</li>
  * </ul>
  *
  * <p>Extraction is two-pass: the entire archive is buffered in memory first
@@ -229,6 +231,23 @@ public class ZipSkillFetcher {
                     throw new IOException("Total extracted size exceeds 50MB limit");
                 }
 
+                // Skill bundles persist file contents as text (mate_skill_file
+                // is a TEXT column; SkillBundle carries Map<String,String>).
+                // Decoding a binary entry (.png/.woff/.zip/compiled helper, …)
+                // as text replaces every invalid byte with U+FFFD, so the file
+                // would be stored permanently corrupted and "restored" broken
+                // on every sync. Binary resources are not supported in a bundle
+                // today, so skip them with a clear WARN instead of silently
+                // mangling them — matches how unknown root-level files are
+                // already handled below. (Root-level binaries were already
+                // dropped; this also covers binaries nested in scripts/ and
+                // references/, which previously slipped through corrupted.)
+                if (isLikelyBinary(bytes)) {
+                    log.warn("[ZipSkillFetcher] Skipping binary entry (not supported in skill bundles): {}", entryName);
+                    zis.closeEntry();
+                    continue;
+                }
+
                 String content = new String(bytes, charset);
                 String normalizedName = entryPath.toString().replace('\\', '/');
                 String fileName = entryPath.getFileName().toString();
@@ -289,6 +308,27 @@ public class ZipSkillFetcher {
         return new ExtractedSkill(skillMdContent, references, scripts);
     }
 
+    /**
+     * Heuristic binary detector: an entry is treated as binary if a NUL byte
+     * (0x00) appears within the inspected prefix. UTF-8 and GBK text never
+     * contain a NUL, while virtually every binary format (PNG/WOFF/ZIP/class/
+     * native executable) carries one near the start — this is the same cheap,
+     * reliable test git uses to decide "is this a text file". Inspecting only a
+     * prefix keeps it O(1) for large entries.
+     */
+    private static boolean isLikelyBinary(byte[] bytes) {
+        if (bytes == null || bytes.length == 0) {
+            return false;
+        }
+        int limit = Math.min(bytes.length, 8000);
+        for (int i = 0; i < limit; i++) {
+            if (bytes[i] == 0x00) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     /**
      * Classify a root-level file (sibling of SKILL.md, no directory prefix)
      * by extension. Returns {@code "scripts"} / {@code "references"} for
diff --git a/mateclaw-server/src/main/resources/application.yml b/mateclaw-server/src/main/resources/application.yml
index d064b00c..a547ece6 100644
--- a/mateclaw-server/src/main/resources/application.yml
+++ b/mateclaw-server/src/main/resources/application.yml
@@ -148,7 +148,11 @@ mateclaw:
       mode: ${MATECLAW_TOOLS_DISCLOSURE_MODE:progressive}
   skill:
     workspace:
-      root: ${user.home}/.mateclaw/skills
+      # Skill workspace root. Override with MATECLAW_SKILL_WORKSPACE_ROOT to
+      # relocate it onto a persistent volume — in Docker this is pointed at
+      # /app/data/skills so the existing server_data volume persists installed
+      # skills, accumulated LESSONS.md, and skill runtime files across restarts.
+      root: ${MATECLAW_SKILL_WORKSPACE_ROOT:${user.home}/.mateclaw/skills}
       auto-init: true
       delete-policy: archive
     disclosure:
diff --git a/mateclaw-server/src/test/java/vip/mate/skill/installer/ZipSkillFetcherTest.java b/mateclaw-server/src/test/java/vip/mate/skill/installer/ZipSkillFetcherTest.java
index 0037c325..6e5606d0 100644
--- a/mateclaw-server/src/test/java/vip/mate/skill/installer/ZipSkillFetcherTest.java
+++ b/mateclaw-server/src/test/java/vip/mate/skill/installer/ZipSkillFetcherTest.java
@@ -205,6 +205,44 @@ class ZipSkillFetcherTest {
         assertEquals("#!/bin/sh\n", ex.scripts().get("setup.sh"));
     }
 
+    private record RawEntry(String name, byte[] content) {}
+
+    private static byte[] zipOfRaw(List<RawEntry> entries) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try (ZipOutputStream zos = new ZipOutputStream(baos, StandardCharsets.UTF_8)) {
+            for (RawEntry e : entries) {
+                zos.putNextEntry(new ZipEntry(e.name()));
+                zos.write(e.content());
+                zos.closeEntry();
+            }
+        }
+        return baos.toByteArray();
+    }
+
+    @Test
+    @DisplayName("Binary entry under scripts/ is skipped, not stored corrupted (#273)")
+    void binaryEntryInScriptsIsSkipped() throws IOException {
+        // A PNG header carries a NUL byte; decoding it as UTF-8 would replace
+        // bytes with U+FFFD and persist a corrupted "text" file. The fetcher
+        // must drop it (with a WARN) while keeping the legitimate text script.
+        byte[] pngBytes = new byte[]{(byte) 0x89, 'P', 'N', 'G', 0x00, 0x1A, 0x0A, 'x'};
+        byte[] zip = zipOfRaw(List.of(
+                new RawEntry("pkg/SKILL.md", SKILL_MD.getBytes(StandardCharsets.UTF_8)),
+                new RawEntry("pkg/scripts/run.py", "print('ok')\n".getBytes(StandardCharsets.UTF_8)),
+                new RawEntry("pkg/scripts/logo.png", pngBytes),
+                new RawEntry("pkg/references/font.woff", new byte[]{'w', 'O', 'F', 'F', 0x00, 0x01})
+        ));
+
+        ZipSkillFetcher.ExtractedSkill ex = ZipSkillFetcher.extract(new ByteArrayInputStream(zip));
+
+        // Text script survives; both binaries are dropped (no corrupted entry).
+        assertEquals(Map.of("run.py", "print('ok')\n"), ex.scripts(),
+                "Binary logo.png must not be stored; the text script stays");
+        assertTrue(ex.references().isEmpty(),
+                "Binary font.woff must not be stored as corrupted text");
+        assertFalse(ex.scripts().containsKey("logo.png"));
+    }
+
     @Test
     @DisplayName("GBK-encoded entry names (Windows-authored zip) fall back from UTF-8 to GBK")
     void extractsGbkEncodedNames() throws IOException {