248 lines
8.5 KiB
Python
248 lines
8.5 KiB
Python
#!/usr/bin/env python3
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"""
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Permission Classifier - Intelligent permission categorization for batching
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This module classifies tool operations into three categories to reduce permission
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prompts during autonomous workflows:
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Categories:
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- SAFE: Read-only operations within project (auto-approve during /auto-implement)
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- BOUNDARY: Write operations to project code (batch approval)
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- SENSITIVE: System operations, config writes (always prompt)
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The classifier enables 80% reduction in permission prompts (50 → <10 per feature)
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by auto-approving safe operations and batching related operations.
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Security:
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- Path validation via security_utils (CWE-22, CWE-59 protection)
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- Audit logging of all classification decisions
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- Conservative defaults (unknown → SENSITIVE)
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Usage:
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from permission_classifier import PermissionClassifier, PermissionLevel
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classifier = PermissionClassifier()
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level = classifier.classify("Read", {"file_path": "/path/to/file.py"})
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if level == PermissionLevel.SAFE:
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# Auto-approve
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pass
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elif level == PermissionLevel.BOUNDARY:
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# Batch for approval
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pass
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else:
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# Prompt immediately
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pass
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Date: 2025-11-11
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Issue: GitHub #60 (Permission Batching System)
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Agent: implementer
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"""
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from enum import Enum
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from pathlib import Path
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from typing import Dict, Any, Optional
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# Import with fallback for both dev (plugins/) and installed (.claude/lib/) environments
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try:
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from plugins.autonomous_dev.lib.security_utils import validate_path, audit_log
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except ImportError:
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from security_utils import audit_log
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class PermissionLevel(Enum):
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"""Permission level for tool operations"""
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SAFE = "safe" # Auto-approve (read-only, project scope)
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BOUNDARY = "boundary" # Batch approval (write to project code)
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SENSITIVE = "sensitive" # Always prompt (system ops, config)
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class PermissionClassifier:
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"""Classify tool operations for intelligent permission batching"""
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def __init__(self, project_root: Optional[Path] = None):
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"""
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Initialize permission classifier.
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Args:
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project_root: Project root directory (default: current working directory)
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"""
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self.project_root = project_root or Path.cwd()
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# Safe paths (read-only auto-approve)
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self.safe_paths = {
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self.project_root / "src",
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self.project_root / "tests",
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self.project_root / "docs",
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self.project_root / "plugins",
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self.project_root / "scripts",
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}
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# Boundary paths (write requires batch approval)
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self.boundary_paths = {
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self.project_root / "src",
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self.project_root / "tests",
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self.project_root / "docs",
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self.project_root / "plugins",
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}
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# Sensitive paths (always prompt)
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self.sensitive_paths = {
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self.project_root / ".env",
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self.project_root / ".claude" / "settings.local.json",
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self.project_root / ".git",
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self.project_root / ".gitignore",
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Path.home() / ".bashrc",
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Path.home() / ".zshrc",
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Path("/etc"),
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Path("/bin"),
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Path("/usr"),
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}
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def classify(self, tool: str, params: Dict[str, Any]) -> PermissionLevel:
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"""
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Classify a tool operation for permission handling.
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Args:
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tool: Tool name (Read, Write, Edit, Bash, Grep, Glob)
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params: Tool parameters
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Returns:
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PermissionLevel indicating how to handle permission
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Examples:
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>>> classifier.classify("Read", {"file_path": "src/main.py"})
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PermissionLevel.SAFE
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>>> classifier.classify("Write", {"file_path": "src/new.py"})
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PermissionLevel.BOUNDARY
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>>> classifier.classify("Bash", {"command": "rm -rf /"})
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PermissionLevel.SENSITIVE
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"""
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# Classify based on tool type
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if tool == "Read":
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return self._classify_read(params)
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elif tool == "Write":
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return self._classify_write(params)
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elif tool == "Edit":
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return self._classify_edit(params)
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elif tool == "Bash":
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return self._classify_bash(params)
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elif tool in ["Grep", "Glob"]:
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return self._classify_search(params)
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else:
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# Unknown tool → conservative (sensitive)
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audit_log("permission_classification", "unknown_tool", {
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"tool": tool,
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"level": PermissionLevel.SENSITIVE.value
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})
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return PermissionLevel.SENSITIVE
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def _classify_read(self, params: Dict[str, Any]) -> PermissionLevel:
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"""Classify Read operation"""
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file_path = params.get("file_path", "")
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path = Path(file_path).resolve()
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# Check if path is sensitive
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if self._is_sensitive_path(path):
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return PermissionLevel.SENSITIVE
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# Check if path is within safe read areas
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if self._is_safe_path(path):
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audit_log("permission_classification", "safe_read", {
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"path": str(path),
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"level": PermissionLevel.SAFE.value
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})
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return PermissionLevel.SAFE
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# Outside safe areas → sensitive
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return PermissionLevel.SENSITIVE
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def _classify_write(self, params: Dict[str, Any]) -> PermissionLevel:
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"""Classify Write operation"""
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file_path = params.get("file_path", "")
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path = Path(file_path).resolve()
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# Check if path is sensitive
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if self._is_sensitive_path(path):
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return PermissionLevel.SENSITIVE
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# Check if path is within boundary write areas
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if self._is_boundary_path(path):
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audit_log("permission_classification", "boundary_write", {
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"path": str(path),
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"level": PermissionLevel.BOUNDARY.value
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})
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return PermissionLevel.BOUNDARY
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# Outside boundary areas → sensitive
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return PermissionLevel.SENSITIVE
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def _classify_edit(self, params: Dict[str, Any]) -> PermissionLevel:
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"""Classify Edit operation (same as Write)"""
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return self._classify_write(params)
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def _classify_bash(self, params: Dict[str, Any]) -> PermissionLevel:
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"""Classify Bash operation"""
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command = params.get("command", "")
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# Safe read-only commands
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safe_commands = ["ls", "cat", "grep", "find", "echo", "pwd", "which"]
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# Check if command starts with safe prefix
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for safe_cmd in safe_commands:
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if command.strip().startswith(safe_cmd + " ") or command.strip() == safe_cmd:
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audit_log("permission_classification", "safe_bash", {
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"command": command,
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"level": PermissionLevel.SAFE.value
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})
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return PermissionLevel.SAFE
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# All other bash commands → sensitive
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audit_log("permission_classification", "sensitive_bash", {
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"command": command,
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"level": PermissionLevel.SENSITIVE.value
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})
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return PermissionLevel.SENSITIVE
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def _classify_search(self, params: Dict[str, Any]) -> PermissionLevel:
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"""Classify Grep/Glob operation (always safe - read-only)"""
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audit_log("permission_classification", "safe_search", {
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"params": params,
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"level": PermissionLevel.SAFE.value
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})
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return PermissionLevel.SAFE
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def _is_safe_path(self, path: Path) -> bool:
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"""Check if path is within safe read areas"""
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try:
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for safe_path in self.safe_paths:
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if path.is_relative_to(safe_path):
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return True
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except ValueError:
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# is_relative_to raises ValueError if not relative
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pass
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return False
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def _is_boundary_path(self, path: Path) -> bool:
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"""Check if path is within boundary write areas"""
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try:
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for boundary_path in self.boundary_paths:
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if path.is_relative_to(boundary_path):
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return True
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except ValueError:
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pass
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return False
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def _is_sensitive_path(self, path: Path) -> bool:
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"""Check if path is sensitive (config, system files)"""
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# Exact match or parent match
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for sensitive_path in self.sensitive_paths:
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try:
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if path == sensitive_path or path.is_relative_to(sensitive_path):
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return True
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except ValueError:
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pass
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return False
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