fix: use UTF-8 for text file operations

docs/zh/s02-tool-use.md

@@ -41,7 +41,7 @@ def safe_path(p: str) -> Path:
     return path
 
 def run_read(path: str, limit: int = None) -> str:
-    text = safe_path(path).read_text()
+    text = safe_path(path).read_text(encoding="utf-8")
     lines = text.splitlines()
     if limit and limit < len(lines):
         lines = lines[:limit]

docs/zh/s05-skill-loading.md

@@ -52,7 +52,7 @@ class SkillLoader:
     def __init__(self, skills_dir: Path):
         self.skills = {}
         for f in sorted(skills_dir.rglob("SKILL.md")):
-            text = f.read_text()
+            text = f.read_text(encoding="utf-8")
             meta, body = self._parse_frontmatter(text)
             name = meta.get("name", f.parent.name)
             self.skills[name] = {"meta": meta, "body": body}

docs/zh/s07-task-system.md

@@ -71,7 +71,7 @@ class TaskManager:
 ```python
 def _clear_dependency(self, completed_id):
     for f in self.dir.glob("task_*.json"):
-        task = json.loads(f.read_text())
+        task = json.loads(f.read_text(encoding="utf-8"))
         if completed_id in task.get("blockedBy", []):
             task["blockedBy"].remove(completed_id)
             self._save(task)

docs/zh/s09-agent-teams.md

@@ -78,8 +78,8 @@ class MessageBus:
     def read_inbox(self, name):
         path = self.dir / f"{name}.jsonl"
         if not path.exists(): return "[]"
-        msgs = [json.loads(l) for l in path.read_text().strip().splitlines() if l]
-        path.write_text("")  # drain
+        msgs = [json.loads(l) for l in path.read_text(encoding="utf-8").strip().splitlines() if l]
+        path.write_text("", encoding="utf-8")  # drain
         return json.dumps(msgs, indent=2)
 ```
 

docs/zh/s11-autonomous-agents.md

@@ -98,7 +98,7 @@ def _idle_poll(self, name, messages):
 def scan_unclaimed_tasks() -> list:
     unclaimed = []
     for f in sorted(TASKS_DIR.glob("task_*.json")):
-        task = json.loads(f.read_text())
+        task = json.loads(f.read_text(encoding="utf-8"))
         if (task.get("status") == "pending"
                 and not task.get("owner")
                 and not task.get("blockedBy")):