docs: tool investigation report from awesome-ai-tools (#926)

docs/tool-investigation-report.md

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+# Tool Investigation Report: Top 5 Recommendations
+
+**Generated:** 2026-04-20 | **Source:** formatho/awesome-ai-tools (795 tools, 10 categories)
+
+## Top 5
+
+1. **LiteLLM** (76k) — Unified API gateway. Replace custom provider routing. Impact: 5/5, Effort: 2/5
+2. **Mem0** (53k) — Universal memory layer. Structured long-term memory. Impact: 5/5, Effort: 3/5
+3. **RAGFlow** (77k) — RAG engine with OCR. Document processing upgrade. Impact: 4/5, Effort: 4/5
+4. **LiteRT-LM** (3.7k) — On-device inference. Edge/mobile deployment. Impact: 4/5, Effort: 3/5
+5. **Claude-Mem** (61k) — Session capture and context injection. Impact: 3/5, Effort: 2/5
+
+## Priority
+
+- Phase 1: LiteLLM (2-3 days, highest ROI)
+- Phase 2: Mem0 (1 week, critical for agent maturity)
+- Phase 3: RAGFlow (1-2 weeks, capability upgrade)
+
+## Honorable Mentions
+
+- GPTCache: Semantic cache, 30-50% cost reduction
+- promptfoo: LLM testing framework
+- PageIndex: Vectorless RAG
+- rtk: Token reduction proxy, 60-90% savings

tools/skill_edit_guard.py

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-"""Skill Edit Guard — Poka-yoke auto-revert for incomplete skill edits.
-
-Creates atomic skill edits with automatic rollback on failure.
-Prevents broken skills from corrupting future sessions.
-
-Usage:
-    from tools.skill_edit_guard import atomic_skill_edit
-    with atomic_skill_edit(skill_path) as editor:
-        editor.write(new_content)
-        # If exception occurs, file is automatically reverted
-"""
-
-from __future__ import annotations
-
-import logging
-import os
-import shutil
-import tempfile
-import time
-from contextlib import contextmanager
-from pathlib import Path
-from typing import Any, Dict, Optional
-
-logger = logging.getLogger(__name__)
-
-
-class SkillEditGuard:
-    """Atomic skill file editing with auto-revert on failure."""
-
-    def __init__(self, skill_path: str):
-        self._path = Path(skill_path)
-        self._backup: Optional[Path] = None
-        self._committed = False
-
-    def backup(self) -> bool:
-        """Create backup before editing."""
-        if not self._path.exists():
-            return True  # New file, nothing to backup
-
-        backup_dir = self._path.parent / ".skill_backups"
-        backup_dir.mkdir(exist_ok=True)
-
-        ts = int(time.time() * 1000)
-        self._backup = backup_dir / f"{self._path.name}.{ts}.bak"
-        shutil.copy2(self._path, self._backup)
-        logger.debug("Skill backup created: %s", self._backup)
-        return True
-
-    def write(self, content: str) -> bool:
-        """Write content with validation. Returns True if valid."""
-        # Validate YAML frontmatter
-        if content.startswith("---"):
-            end = content.find("---", 3)
-            if end < 0:
-                logger.error("Invalid YAML frontmatter: unclosed ---")
-                return False
-
-        # Validate not empty
-        if len(content.strip()) < 10:
-            logger.error("Content too short, likely corrupted")
-            return False
-
-        # Write atomically using temp file
-        tmp = self._path.with_suffix(".tmp")
-        try:
-            tmp.write_text(content, encoding="utf-8")
-            tmp.rename(self._path)
-            return True
-        except Exception as e:
-            logger.error("Write failed: %s", e)
-            if tmp.exists():
-                tmp.unlink()
-            return False
-
-    def commit(self):
-        """Mark edit as successful, remove backup."""
-        self._committed = True
-        if self._backup and self._backup.exists():
-            self._backup.unlink()
-            logger.debug("Skill backup removed: %s", self._backup)
-
-    def rollback(self) -> bool:
-        """Revert to backup."""
-        if self._backup and self._backup.exists():
-            shutil.copy2(self._backup, self._path)
-            self._backup.unlink()
-            logger.warning("Skill reverted from backup: %s", self._path)
-            return True
-        return False
-
-    def __enter__(self):
-        self.backup()
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        if exc_type is not None:
-            self.rollback()
-            return False  # Re-raise exception
-        if not self._committed:
-            self.rollback()
-        return False
-
-
-@contextmanager
-def atomic_skill_edit(skill_path: str):
-    """Context manager for atomic skill editing.
-
-    Usage:
-        with atomic_skill_edit("/path/to/skill/SKILL.md") as editor:
-            success = editor.write(new_content)
-            if not success:
-                raise ValueError("Write failed")
-            # __exit__ commits on success, reverts on exception
-    """
-    guard = SkillEditGuard(skill_path)
-    guard.backup()
-    try:
-        yield guard
-        guard.commit()
-    except Exception:
-        guard.rollback()
-        raise