fix(skills): 添加脚本路径强制规则，修复 docx/pptx/xlsx 脚本找不到的问题

Agent 执行技能内置脚本时 cwd 不在技能目录，导致 python scripts/... 相对路径失败。
在 L2 规范中增加 Script Path Rule，要求使用 <skill-dir> 拼接完整路径。

skills/xlsx/SKILL.md

@@ -40,7 +40,7 @@ metadata:
       description: >-
         Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like "the xlsx in my downloads") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved. Use when 用户提到 Excel、 电子表格、xlsx、表格处理、公式计算、数据清洗、图表、CSV导入导出。
       body: ./SKILL.zh-CN.md
-      source_hash: sha256:de1660781d23798b
+      source_hash: sha256:17c76a78ed03d451
       translated_by: human
     en-US:
       name: Spreadsheet Processing
@@ -48,8 +48,8 @@ metadata:
       description: >-
         Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like "the xlsx in my downloads") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved. Use when the user mentions Excel, spreadsheets, xlsx, table processing, formula computation, data cleaning, charts, or CSV import/export.
       body: ./SKILL.md
-      source_hash: sha256:de1660781d23798b
-      translated_by: ai:claude-opus-4-7
+      source_hash: sha256:17c76a78ed03d451
+      translated_by: human
       translated_at: '2026-05-03'
 market:
   icon: >-
@@ -93,6 +93,20 @@ xlsx is a **Procedural Skill** that provides full processing capabilities for Ex
 
 ## L2: Detailed Specification
 
+### Script Path Rule (mandatory)
+
+The Python scripts bundled with this skill live inside the skill installation directory. You **MUST use full paths** when invoking them — never use bare relative paths.
+
+The skill directory is provided by the `<skill-dir>` tag in the context. Prefix all `scripts/` commands accordingly:
+
+```bash
+python "<skill-dir>/scripts/office/unpack.py" spreadsheet.xlsx unpacked/
+python "<skill-dir>/scripts/office/pack.py" unpacked/ output.xlsx
+python "<skill-dir>/scripts/recalc.py" output.xlsx
+```
+
+**NEVER** run `python scripts/office/unpack.py` directly — that relative path does not exist in the user's working directory.
+
 ## Prerequisites
 
 ### Python 3 (required)

skills/xlsx/SKILL.zh-CN.md

@@ -21,6 +21,20 @@ xlsx 是一个**流程型技能（Procedural Skill）**，提供 Excel 电子表
 
 ## L2：详细规范
 
+### 脚本路径规则（强制）
+
+本技能自带的 Python 脚本位于技能安装目录内。执行时**必须使用完整路径**，不能使用相对路径。
+
+技能目录由上下文中的 `<skill-dir>` 标签提供。所有 `scripts/` 开头的命令都应拼接为：
+
+```bash
+python "<skill-dir>/scripts/office/unpack.py" spreadsheet.xlsx unpacked/
+python "<skill-dir>/scripts/office/pack.py" unpacked/ output.xlsx
+python "<skill-dir>/scripts/recalc.py" output.xlsx
+```
+
+**禁止**直接执行 `python scripts/office/unpack.py`——该相对路径在用户工作目录下不存在。
+
 ## Prerequisites
 
 ### Python 3（必需）