diff --git a/tools/skill_writer.py b/tools/skill_writer.py
new file mode 100644
index 0000000..7ecaddb
--- /dev/null
+++ b/tools/skill_writer.py
@@ -0,0 +1,165 @@
+"""
+Skill Writer — creates and updates teacher skill directories.
+Adapted from colleague-skill's skill_writer.py for Buddhist teacher context.
+"""
+
+import json
+import os
+import shutil
+from datetime import datetime
+from typing import Optional
+
+try:
+    from pypinyin import lazy_pinyin, Style
+    HAS_PYPINYIN = True
+except ImportError:
+    HAS_PYPINYIN = False
+
+
+SKILL_MD_TEMPLATE = """---
+name: teacher_{slug}
+description: 依据{name}（{tradition}{school}）的教学风格与教义体系
+user-invocable: true
+---
+
+# {name}
+
+{disclaimer}
+
+---
+
+## PART A — 教义体系
+
+{teaching_content}
+
+## PART B — 说法风格
+
+{voice_content}
+
+## 运行规则
+
+1. 收到提问后，先依据 voice.md Layer 0 硬规则检查
+2. 依据 voice.md Layer 1-3 确定回答的风格和方式
+3. 依据 teaching.md 检索相关教义内容
+4. 以该法师的风格组织回答
+5. 必须附经文出处，格式：【《经名》卷N】→ https://fojin.app/texts/{text_id}
+6. 遇到超出范围的问题，坦诚说明并建议查阅相关传承
+"""
+
+DISCLAIMER = "本内容依据历史佛教文献生成，仅供参考学习。如需正式修行指导，请亲近善知识。所有回答均附经文出处，可通过 FoJin (fojin.app) 查阅原文。"
+
+
+def slugify(name: str) -> str:
+    """Convert teacher name to URL-safe slug."""
+    if HAS_PYPINYIN:
+        pinyin_list = lazy_pinyin(name, style=Style.NORMAL)
+        slug = "-".join(pinyin_list)
+    else:
+        slug = name.lower().replace(" ", "-")
+    slug = "".join(c for c in slug if c.isalnum() or c == "-")
+    slug = slug.strip("-")
+    return slug
+
+
+def create_teacher(
+    base_dir: str,
+    name: str,
+    tradition: str,
+    school: str,
+    era: str,
+    languages: list,
+    teaching_content: str,
+    voice_content: str,
+    fojin_entity_id: Optional[str] = None,
+    sources: Optional[list] = None,
+) -> str:
+    """Create a new teacher skill directory."""
+    slug = slugify(name)
+    teacher_dir = os.path.join(base_dir, slug)
+    os.makedirs(teacher_dir, exist_ok=True)
+    os.makedirs(os.path.join(teacher_dir, "versions"), exist_ok=True)
+
+    with open(os.path.join(teacher_dir, "teaching.md"), "w", encoding="utf-8") as f:
+        f.write(teaching_content)
+
+    with open(os.path.join(teacher_dir, "voice.md"), "w", encoding="utf-8") as f:
+        f.write(voice_content)
+
+    skill_content = SKILL_MD_TEMPLATE.format(
+        slug=slug, name=name, tradition=tradition, school=school,
+        disclaimer=DISCLAIMER, teaching_content=teaching_content,
+        voice_content=voice_content,
+    )
+    with open(os.path.join(teacher_dir, "SKILL.md"), "w", encoding="utf-8") as f:
+        f.write(skill_content)
+
+    meta = {
+        "name": name, "slug": slug, "tradition": tradition, "school": school,
+        "era": era, "languages": languages, "fojin_entity_id": fojin_entity_id,
+        "sources": sources or [], "version": "1.0.0",
+        "created_at": datetime.now().strftime("%Y-%m-%d"),
+        "updated_at": datetime.now().strftime("%Y-%m-%d"),
+        "disclaimer": DISCLAIMER,
+    }
+    with open(os.path.join(teacher_dir, "meta.json"), "w", encoding="utf-8") as f:
+        json.dump(meta, f, ensure_ascii=False, indent=2)
+
+    return teacher_dir
+
+
+def update_teacher(teacher_dir: str, teaching_patch: Optional[str] = None, voice_patch: Optional[str] = None) -> str:
+    """Update an existing teacher skill with new content. Archives current version before updating."""
+    meta_path = os.path.join(teacher_dir, "meta.json")
+    with open(meta_path, "r", encoding="utf-8") as f:
+        meta = json.load(f)
+
+    version = meta.get("version", "1.0.0")
+    version_dir = os.path.join(teacher_dir, "versions", f"v{version}")
+    os.makedirs(version_dir, exist_ok=True)
+    for fname in ["SKILL.md", "teaching.md", "voice.md", "meta.json"]:
+        src = os.path.join(teacher_dir, fname)
+        if os.path.exists(src):
+            shutil.copy2(src, version_dir)
+
+    if teaching_patch:
+        with open(os.path.join(teacher_dir, "teaching.md"), "a", encoding="utf-8") as f:
+            f.write("\n\n" + teaching_patch)
+
+    if voice_patch:
+        with open(os.path.join(teacher_dir, "voice.md"), "a", encoding="utf-8") as f:
+            f.write("\n\n" + voice_patch)
+
+    parts = version.split(".")
+    parts[1] = str(int(parts[1]) + 1)
+    new_version = ".".join(parts)
+
+    meta["version"] = new_version
+    meta["updated_at"] = datetime.now().strftime("%Y-%m-%d")
+    with open(meta_path, "w", encoding="utf-8") as f:
+        json.dump(meta, f, ensure_ascii=False, indent=2)
+
+    teaching_content = open(os.path.join(teacher_dir, "teaching.md"), encoding="utf-8").read()
+    voice_content = open(os.path.join(teacher_dir, "voice.md"), encoding="utf-8").read()
+    skill_content = SKILL_MD_TEMPLATE.format(
+        slug=meta["slug"], name=meta["name"], tradition=meta["tradition"],
+        school=meta["school"], disclaimer=DISCLAIMER,
+        teaching_content=teaching_content, voice_content=voice_content,
+    )
+    with open(os.path.join(teacher_dir, "SKILL.md"), "w", encoding="utf-8") as f:
+        f.write(skill_content)
+
+    return new_version
+
+
+def list_teachers(base_dir: str) -> list:
+    """List all teacher skills in a directory."""
+    teachers = []
+    if not os.path.exists(base_dir):
+        return teachers
+    for entry in sorted(os.listdir(base_dir)):
+        meta_path = os.path.join(base_dir, entry, "meta.json")
+        if os.path.isfile(meta_path):
+            with open(meta_path, "r", encoding="utf-8") as f:
+                meta = json.load(f)
+            teachers.append(meta)
+    return teachers