mirror of
https://github.com/shareAI-lab/learn-claude-code.git
synced 2026-08-26 00:32:06 +00:00
378 lines
12 KiB
Python
378 lines
12 KiB
Python
#!/usr/bin/env python3
|
|
"""
|
|
s07_skill_loading.py - Skill Loading
|
|
|
|
The system prompt contains a catalog of skill names and descriptions.
|
|
The model loads the full SKILL.md only when it calls load_skill.
|
|
|
|
skills/ Startup
|
|
+------------------+ +------------------+
|
|
| code-review/ | ----> | SkillLoader |
|
|
| SKILL.md | | name + summary |
|
|
| pdf/ | +--------+---------+
|
|
| SKILL.md | |
|
|
+------------------+ v
|
|
system prompt catalog
|
|
|
|
LLM -- load_skill(name) --> full SKILL.md
|
|
^ |
|
|
+--------- tool_result --------+
|
|
"""
|
|
|
|
import os
|
|
import subprocess
|
|
from pathlib import Path
|
|
|
|
import yaml
|
|
|
|
try:
|
|
import readline
|
|
readline.parse_and_bind('set bind-tty-special-chars off')
|
|
readline.parse_and_bind('set input-meta on')
|
|
readline.parse_and_bind('set output-meta on')
|
|
readline.parse_and_bind('set convert-meta off')
|
|
except ImportError:
|
|
pass
|
|
|
|
from anthropic import Anthropic
|
|
from dotenv import load_dotenv
|
|
|
|
load_dotenv(override=True)
|
|
if os.getenv("ANTHROPIC_BASE_URL"):
|
|
os.environ.pop("ANTHROPIC_AUTH_TOKEN", None)
|
|
|
|
WORKDIR = Path.cwd()
|
|
SKILLS_DIR = WORKDIR / "skills"
|
|
client = Anthropic(base_url=os.getenv("ANTHROPIC_BASE_URL"))
|
|
MODEL = os.environ["MODEL_ID"]
|
|
|
|
|
|
# -- Skill catalog --
|
|
|
|
class SkillLoader:
|
|
def __init__(self, skills_dir: Path):
|
|
self.skills_dir = skills_dir
|
|
self.skills: dict[str, dict[str, str]] = {}
|
|
self.scan()
|
|
|
|
@staticmethod
|
|
def parse_frontmatter(text: str) -> tuple[dict, str]:
|
|
lines = text.splitlines(keepends=True)
|
|
if not lines or lines[0].rstrip("\r\n") != "---":
|
|
return {}, text
|
|
|
|
closing_index = next(
|
|
(index for index, line in enumerate(lines[1:], start=1)
|
|
if line.rstrip("\r\n") == "---"),
|
|
None,
|
|
)
|
|
if closing_index is None:
|
|
return {}, text
|
|
|
|
frontmatter = "".join(lines[1:closing_index])
|
|
body = "".join(lines[closing_index + 1:]).strip()
|
|
try:
|
|
metadata = yaml.safe_load(frontmatter) or {}
|
|
except yaml.YAMLError:
|
|
metadata = {}
|
|
if not isinstance(metadata, dict):
|
|
metadata = {}
|
|
return metadata, body
|
|
|
|
def scan(self):
|
|
self.skills.clear()
|
|
if not self.skills_dir.exists():
|
|
return
|
|
|
|
skills_root = self.skills_dir.resolve()
|
|
for manifest in sorted(self.skills_dir.glob("*/SKILL.md")):
|
|
if (not manifest.is_file()
|
|
or not manifest.resolve().is_relative_to(skills_root)):
|
|
continue
|
|
content = manifest.read_text()
|
|
metadata, body = self.parse_frontmatter(content)
|
|
raw_name = metadata.get("name")
|
|
name = raw_name.strip() if isinstance(raw_name, str) else ""
|
|
name = name or manifest.parent.name
|
|
raw_description = metadata.get("description")
|
|
description = (raw_description.strip()
|
|
if isinstance(raw_description, str) else "")
|
|
description = description or body.split("\n", 1)[0]
|
|
description = " ".join(str(description).lstrip("# ").split())
|
|
self.skills[name] = {
|
|
"name": name,
|
|
"description": description,
|
|
"content": content,
|
|
}
|
|
|
|
def catalog(self) -> str:
|
|
if not self.skills:
|
|
return "(no skills found)"
|
|
return "\n".join(
|
|
f"- {skill['name']}: {skill['description']}"
|
|
for skill in self.skills.values()
|
|
)
|
|
|
|
def load(self, name: str) -> str:
|
|
skill = self.skills.get(name)
|
|
if skill:
|
|
return skill["content"]
|
|
available = ", ".join(self.skills) or "none"
|
|
return f"Error: Unknown skill '{name}'. Available: {available}"
|
|
|
|
|
|
SKILL_LOADER = SkillLoader(SKILLS_DIR)
|
|
|
|
|
|
def build_system_prompt() -> str:
|
|
return (
|
|
f"You are a coding agent at {WORKDIR}. Use tools to solve tasks. "
|
|
"Act, don't explain.\n\n"
|
|
f"Skills available:\n{SKILL_LOADER.catalog()}\n\n"
|
|
"Use load_skill to read the full instructions when a skill applies."
|
|
)
|
|
|
|
|
|
SYSTEM = build_system_prompt()
|
|
|
|
|
|
# -- Tools --
|
|
|
|
def run_bash(command: str) -> str:
|
|
try:
|
|
result = subprocess.run(
|
|
command, shell=True, cwd=WORKDIR,
|
|
capture_output=True, text=True, timeout=120,
|
|
)
|
|
output = (result.stdout + result.stderr).strip()
|
|
return output[:50000] if output else "(no output)"
|
|
except subprocess.TimeoutExpired:
|
|
return "Error: Timeout (120s)"
|
|
|
|
|
|
def run_read(path: str, limit: int | None = None) -> str:
|
|
try:
|
|
lines = (WORKDIR / path).resolve().read_text().splitlines()
|
|
if limit and limit < len(lines):
|
|
lines = lines[:limit] + [f"... ({len(lines) - limit} more lines)"]
|
|
return "\n".join(lines)
|
|
except Exception as e:
|
|
return f"Error: {e}"
|
|
|
|
|
|
def run_write(path: str, content: str) -> str:
|
|
try:
|
|
file_path = (WORKDIR / path).resolve()
|
|
file_path.parent.mkdir(parents=True, exist_ok=True)
|
|
file_path.write_text(content)
|
|
return f"Wrote {len(content)} bytes to {path}"
|
|
except Exception as e:
|
|
return f"Error: {e}"
|
|
|
|
|
|
def run_edit(path: str, old_text: str, new_text: str) -> str:
|
|
try:
|
|
file_path = (WORKDIR / path).resolve()
|
|
text = file_path.read_text()
|
|
if old_text not in text:
|
|
return f"Error: text not found in {path}"
|
|
file_path.write_text(text.replace(old_text, new_text, 1))
|
|
return f"Edited {path}"
|
|
except Exception as e:
|
|
return f"Error: {e}"
|
|
|
|
|
|
def run_glob(pattern: str) -> str:
|
|
import glob
|
|
try:
|
|
matches = []
|
|
for match in glob.glob(pattern, root_dir=WORKDIR):
|
|
if (WORKDIR / match).resolve().is_relative_to(WORKDIR):
|
|
matches.append(match)
|
|
return "\n".join(matches) if matches else "(no matches)"
|
|
except Exception as e:
|
|
return f"Error: {e}"
|
|
|
|
|
|
TOOLS = [
|
|
{"name": "bash", "description": "Run a shell command.",
|
|
"input_schema": {"type": "object", "properties": {"command": {"type": "string"}}, "required": ["command"]}},
|
|
{"name": "read_file", "description": "Read file contents.",
|
|
"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "limit": {"type": "integer"}}, "required": ["path"]}},
|
|
{"name": "write_file", "description": "Write content to a file.",
|
|
"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "content": {"type": "string"}}, "required": ["path", "content"]}},
|
|
{"name": "edit_file", "description": "Replace exact text in a file once.",
|
|
"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "old_text": {"type": "string"}, "new_text": {"type": "string"}}, "required": ["path", "old_text", "new_text"]}},
|
|
{"name": "glob", "description": "Find files matching a glob pattern.",
|
|
"input_schema": {"type": "object", "properties": {"pattern": {"type": "string"}}, "required": ["pattern"]}},
|
|
{"name": "load_skill", "description": "Load the full SKILL.md content by skill name.",
|
|
"input_schema": {"type": "object", "properties": {"name": {"type": "string"}}, "required": ["name"]}},
|
|
]
|
|
|
|
TOOL_HANDLERS = {
|
|
"bash": run_bash,
|
|
"read_file": run_read,
|
|
"write_file": run_write,
|
|
"edit_file": run_edit,
|
|
"glob": run_glob,
|
|
"load_skill": SKILL_LOADER.load,
|
|
}
|
|
|
|
|
|
# -- Hooks --
|
|
|
|
HOOKS = {"UserPromptSubmit": [], "PreToolUse": [], "PostToolUse": [], "Stop": []}
|
|
|
|
|
|
def register_hook(event: str, callback):
|
|
HOOKS[event].append(callback)
|
|
|
|
|
|
def trigger_hooks(event: str, *args):
|
|
for callback in HOOKS[event]:
|
|
result = callback(*args)
|
|
if result is not None:
|
|
return result
|
|
return None
|
|
|
|
|
|
DENY_LIST = ["rm -rf /", "sudo", "shutdown", "reboot", "mkfs", "dd if="]
|
|
DESTRUCTIVE = ["rm ", "> /etc/", "chmod 777"]
|
|
|
|
|
|
def permission_hook(block):
|
|
"""PreToolUse: block denied operations and ask about risky ones."""
|
|
if block.name == "bash":
|
|
command = block.input.get("command", "")
|
|
for pattern in DENY_LIST:
|
|
if pattern in command:
|
|
print(f"\n\033[31m[blocked] '{pattern}'\033[0m")
|
|
return "Permission denied by deny list"
|
|
for keyword in DESTRUCTIVE:
|
|
if keyword in command:
|
|
print("\n\033[33m[permission] Potentially destructive command\033[0m")
|
|
print(f" Tool: {block.name}({block.input})")
|
|
choice = input(" Allow? [y/N] ").strip().lower()
|
|
if choice not in ("y", "yes"):
|
|
return "Permission denied by user"
|
|
|
|
if block.name in ("read_file", "write_file", "edit_file"):
|
|
path = block.input.get("path", "")
|
|
if not (WORKDIR / path).resolve().is_relative_to(WORKDIR):
|
|
print("\n\033[33m[permission] Access outside workspace\033[0m")
|
|
print(f" Tool: {block.name}({block.input})")
|
|
choice = input(" Allow? [y/N] ").strip().lower()
|
|
if choice not in ("y", "yes"):
|
|
return "Permission denied by user"
|
|
return None
|
|
|
|
|
|
def log_hook(block):
|
|
"""PreToolUse: log every tool call."""
|
|
args_preview = str(list(block.input.values())[:2])[:60]
|
|
print(f"\033[90m[HOOK] {block.name}({args_preview})\033[0m")
|
|
return None
|
|
|
|
|
|
def large_output_hook(block, output):
|
|
"""PostToolUse: warn on large output."""
|
|
if len(str(output)) > 100000:
|
|
print(f"\033[33m[HOOK] Large output from {block.name}: {len(str(output))} chars\033[0m")
|
|
return None
|
|
|
|
|
|
def context_inject_hook(query: str):
|
|
"""UserPromptSubmit: log the working directory."""
|
|
print(f"\033[90m[HOOK] UserPromptSubmit: working in {WORKDIR}\033[0m")
|
|
return None
|
|
|
|
|
|
def summary_hook(messages: list):
|
|
"""Stop: print the number of tool results in this message list."""
|
|
tool_count = sum(
|
|
1
|
|
for message in messages
|
|
for block in (
|
|
message.get("content")
|
|
if isinstance(message.get("content"), list)
|
|
else []
|
|
)
|
|
if isinstance(block, dict) and block.get("type") == "tool_result"
|
|
)
|
|
print(f"\033[90m[HOOK] Stop: session used {tool_count} tool calls\033[0m")
|
|
return None
|
|
|
|
|
|
register_hook("UserPromptSubmit", context_inject_hook)
|
|
register_hook("PreToolUse", permission_hook)
|
|
register_hook("PreToolUse", log_hook)
|
|
register_hook("PostToolUse", large_output_hook)
|
|
register_hook("Stop", summary_hook)
|
|
|
|
|
|
def execute_tool(block) -> str:
|
|
blocked = trigger_hooks("PreToolUse", block)
|
|
if blocked:
|
|
return str(blocked)
|
|
|
|
handler = TOOL_HANDLERS.get(block.name)
|
|
try:
|
|
output = handler(**block.input) if handler else f"Unknown: {block.name}"
|
|
except Exception as e:
|
|
output = f"Error: {e}"
|
|
|
|
trigger_hooks("PostToolUse", block, output)
|
|
return str(output)
|
|
|
|
|
|
def agent_loop(messages: list):
|
|
while True:
|
|
response = client.messages.create(
|
|
model=MODEL,
|
|
system=SYSTEM,
|
|
messages=messages,
|
|
tools=TOOLS,
|
|
max_tokens=8000,
|
|
)
|
|
messages.append({"role": "assistant", "content": response.content})
|
|
|
|
tool_calls = [
|
|
block for block in response.content if block.type == "tool_use"
|
|
]
|
|
if not tool_calls:
|
|
force = trigger_hooks("Stop", messages)
|
|
if force:
|
|
messages.append({"role": "user", "content": force})
|
|
continue
|
|
return
|
|
|
|
results = []
|
|
for block in tool_calls:
|
|
output = execute_tool(block)
|
|
results.append({
|
|
"type": "tool_result",
|
|
"tool_use_id": block.id,
|
|
"content": output,
|
|
})
|
|
messages.append({"role": "user", "content": results})
|
|
|
|
|
|
if __name__ == "__main__":
|
|
print("s07: Skill Loading - catalog first, full content on demand")
|
|
print("Enter a question, press Enter to send. Type q to quit.\n")
|
|
|
|
history = []
|
|
while True:
|
|
try:
|
|
query = input("\033[36ms07 >> \033[0m")
|
|
except (EOFError, KeyboardInterrupt):
|
|
break
|
|
if query.strip().lower() in ("q", "exit", ""):
|
|
break
|
|
trigger_hooks("UserPromptSubmit", query)
|
|
history.append({"role": "user", "content": query})
|
|
agent_loop(history)
|
|
for block in history[-1]["content"]:
|
|
if getattr(block, "type", None) == "text":
|
|
print(block.text)
|
|
print()
|