#!/usr/bin/env python3 """ Session Search Tool - Long-Term Conversation Recall Searches past session transcripts in SQLite via FTS5, then summarizes the top matching sessions using a cheap/fast model (same pattern as web_extract). Returns focused summaries of past conversations rather than raw transcripts, keeping the main model's context window clean. Flow: 1. FTS5 search finds matching messages ranked by relevance 2. Groups by session, takes the top N unique sessions (default 3) 3. Loads each session's conversation, truncates to ~100k chars centered on matches 4. Sends to Gemini Flash with a focused summarization prompt 5. Returns per-session summaries with metadata """ import asyncio import concurrent.futures import json import logging from typing import Dict, Any, List, Optional, Union from agent.auxiliary_client import async_call_llm, extract_content_or_reasoning MAX_SESSION_CHARS = 100_000 MAX_SUMMARY_TOKENS = 10000 def _format_timestamp(ts: Union[int, float, str, None]) -> str: """Convert a Unix timestamp (float/int) or ISO string to a human-readable date. Returns "unknown" for None, str(ts) if conversion fails. """ if ts is None: return "unknown" try: if isinstance(ts, (int, float)): from datetime import datetime dt = datetime.fromtimestamp(ts) return dt.strftime("%B %d, %Y at %I:%M %p") if isinstance(ts, str): if ts.replace(".", "").replace("-", "").isdigit(): from datetime import datetime dt = datetime.fromtimestamp(float(ts)) return dt.strftime("%B %d, %Y at %I:%M %p") return ts except (ValueError, OSError, OverflowError) as e: # Log specific errors for debugging while gracefully handling edge cases logging.debug("Failed to format timestamp %s: %s", ts, e, exc_info=True) except Exception as e: logging.debug("Unexpected error formatting timestamp %s: %s", ts, e, exc_info=True) return str(ts) def _format_conversation(messages: List[Dict[str, Any]]) -> str: """Format session messages into a readable transcript for summarization.""" parts = [] for msg in messages: role = msg.get("role", "unknown").upper() content = msg.get("content") or "" tool_name = msg.get("tool_name") if role == "TOOL" and tool_name: # Truncate long tool outputs if len(content) > 500: content = content[:250] + "\n...[truncated]...\n" + content[-250:] parts.append(f"[TOOL:{tool_name}]: {content}") elif role == "ASSISTANT": # Include tool call names if present tool_calls = msg.get("tool_calls") if tool_calls and isinstance(tool_calls, list): tc_names = [] for tc in tool_calls: if isinstance(tc, dict): name = tc.get("name") or tc.get("function", {}).get("name", "?") tc_names.append(name) if tc_names: parts.append(f"[ASSISTANT]: [Called: {', '.join(tc_names)}]") if content: parts.append(f"[ASSISTANT]: {content}") else: parts.append(f"[ASSISTANT]: {content}") else: parts.append(f"[{role}]: {content}") return "\n\n".join(parts) def _truncate_around_matches( full_text: str, query: str, max_chars: int = MAX_SESSION_CHARS ) -> str: """ Truncate a conversation transcript to max_chars, centered around where the query terms appear. Keeps content near matches, trims the edges. """ if len(full_text) <= max_chars: return full_text # Find the first occurrence of any query term query_terms = query.lower().split() text_lower = full_text.lower() first_match = len(full_text) for term in query_terms: pos = text_lower.find(term) if pos != -1 and pos < first_match: first_match = pos if first_match == len(full_text): # No match found, take from the start first_match = 0 # Center the window around the first match half = max_chars // 2 start = max(0, first_match - half) end = min(len(full_text), start + max_chars) if end - start < max_chars: start = max(0, end - max_chars) truncated = full_text[start:end] prefix = "...[earlier conversation truncated]...\n\n" if start > 0 else "" suffix = "\n\n...[later conversation truncated]..." if end < len(full_text) else "" return prefix + truncated + suffix async def _summarize_session( conversation_text: str, query: str, session_meta: Dict[str, Any] ) -> Optional[str]: """Summarize a single session conversation focused on the search query.""" system_prompt = ( "You are reviewing a past conversation transcript to help recall what happened. " "Summarize the conversation with a focus on the search topic. Include:\n" "1. What the user asked about or wanted to accomplish\n" "2. What actions were taken and what the outcomes were\n" "3. Key decisions, solutions found, or conclusions reached\n" "4. Any specific commands, files, URLs, or technical details that were important\n" "5. Anything left unresolved or notable\n\n" "Be thorough but concise. Preserve specific details (commands, paths, error messages) " "that would be useful to recall. Write in past tense as a factual recap." ) source = session_meta.get("source", "unknown") started = _format_timestamp(session_meta.get("started_at")) user_prompt = ( f"Search topic: {query}\n" f"Session source: {source}\n" f"Session date: {started}\n\n" f"CONVERSATION TRANSCRIPT:\n{conversation_text}\n\n" f"Summarize this conversation with focus on: {query}" ) max_retries = 3 for attempt in range(max_retries): try: response = await async_call_llm( task="session_search", messages=[ {"role": "system", "content": system_prompt}, {"role": "user", "content": user_prompt}, ], temperature=0.1, max_tokens=MAX_SUMMARY_TOKENS, ) content = extract_content_or_reasoning(response) if content: return content # Reasoning-only / empty — let the retry loop handle it logging.warning("Session search LLM returned empty content (attempt %d/%d)", attempt + 1, max_retries) if attempt < max_retries - 1: await asyncio.sleep(1 * (attempt + 1)) continue return content except RuntimeError: logging.warning("No auxiliary model available for session summarization") return None except Exception as e: if attempt < max_retries - 1: await asyncio.sleep(1 * (attempt + 1)) else: logging.warning( "Session summarization failed after %d attempts: %s", max_retries, e, exc_info=True, ) return None # Sources that are excluded from session browsing/searching by default. # Third-party integrations (Paperclip agents, etc.) tag their sessions with # HERMES_SESSION_SOURCE=tool so they don't clutter the user's session history. _HIDDEN_SESSION_SOURCES = ("tool",) def _list_recent_sessions(db, limit: int, current_session_id: str = None) -> str: """Return metadata for the most recent sessions (no LLM calls).""" try: sessions = db.list_sessions_rich(limit=limit + 5, exclude_sources=list(_HIDDEN_SESSION_SOURCES)) # fetch extra to skip current # Resolve current session lineage to exclude it current_root = None if current_session_id: try: sid = current_session_id visited = set() while sid and sid not in visited: visited.add(sid) s = db.get_session(sid) parent = s.get("parent_session_id") if s else None sid = parent if parent else None current_root = max(visited, key=len) if visited else current_session_id except Exception: current_root = current_session_id results = [] for s in sessions: sid = s.get("id", "") if current_root and (sid == current_root or sid == current_session_id): continue # Skip child/delegation sessions (they have parent_session_id) if s.get("parent_session_id"): continue results.append({ "session_id": sid, "title": s.get("title") or None, "source": s.get("source", ""), "started_at": s.get("started_at", ""), "last_active": s.get("last_active", ""), "message_count": s.get("message_count", 0), "preview": s.get("preview", ""), }) if len(results) >= limit: break return json.dumps({ "success": True, "mode": "recent", "results": results, "count": len(results), "message": f"Showing {len(results)} most recent sessions. Use a keyword query to search specific topics.", }, ensure_ascii=False) except Exception as e: logging.error("Error listing recent sessions: %s", e, exc_info=True) return json.dumps({"success": False, "error": f"Failed to list recent sessions: {e}"}, ensure_ascii=False) def session_search( query: str, role_filter: str = None, limit: int = 3, db=None, current_session_id: str = None, ) -> str: """ Search past sessions and return focused summaries of matching conversations. Uses FTS5 to find matches, then summarizes the top sessions with Gemini Flash. The current session is excluded from results since the agent already has that context. """ if db is None: return json.dumps({"success": False, "error": "Session database not available."}, ensure_ascii=False) limit = min(limit, 5) # Cap at 5 sessions to avoid excessive LLM calls # Recent sessions mode: when query is empty, return metadata for recent sessions. # No LLM calls — just DB queries for titles, previews, timestamps. if not query or not query.strip(): return _list_recent_sessions(db, limit, current_session_id) query = query.strip() try: # Parse role filter role_list = None if role_filter and role_filter.strip(): role_list = [r.strip() for r in role_filter.split(",") if r.strip()] # FTS5 search -- get matches ranked by relevance raw_results = db.search_messages( query=query, role_filter=role_list, exclude_sources=list(_HIDDEN_SESSION_SOURCES), limit=50, # Get more matches to find unique sessions offset=0, ) if not raw_results: return json.dumps({ "success": True, "query": query, "results": [], "count": 0, "message": "No matching sessions found.", }, ensure_ascii=False) # Resolve child sessions to their parent — delegation stores detailed # content in child sessions, but the user's conversation is the parent. def _resolve_to_parent(session_id: str) -> str: """Walk delegation chain to find the root parent session ID.""" visited = set() sid = session_id while sid and sid not in visited: visited.add(sid) try: session = db.get_session(sid) if not session: break parent = session.get("parent_session_id") if parent: sid = parent else: break except Exception as e: logging.debug( "Error resolving parent for session %s: %s", sid, e, exc_info=True, ) break return sid current_lineage_root = ( _resolve_to_parent(current_session_id) if current_session_id else None ) # Group by resolved (parent) session_id, dedup, skip the current # session lineage. Compression and delegation create child sessions # that still belong to the same active conversation. seen_sessions = {} for result in raw_results: raw_sid = result["session_id"] resolved_sid = _resolve_to_parent(raw_sid) # Skip the current session lineage — the agent already has that # context, even if older turns live in parent fragments. if current_lineage_root and resolved_sid == current_lineage_root: continue if current_session_id and raw_sid == current_session_id: continue if resolved_sid not in seen_sessions: result = dict(result) result["session_id"] = resolved_sid seen_sessions[resolved_sid] = result if len(seen_sessions) >= limit: break # Prepare all sessions for parallel summarization tasks = [] for session_id, match_info in seen_sessions.items(): try: messages = db.get_messages_as_conversation(session_id) if not messages: continue session_meta = db.get_session(session_id) or {} conversation_text = _format_conversation(messages) conversation_text = _truncate_around_matches(conversation_text, query) tasks.append((session_id, match_info, conversation_text, session_meta)) except Exception as e: logging.warning( "Failed to prepare session %s: %s", session_id, e, exc_info=True, ) # Summarize all sessions in parallel async def _summarize_all() -> List[Union[str, Exception]]: """Summarize all sessions in parallel.""" coros = [ _summarize_session(text, query, meta) for _, _, text, meta in tasks ] return await asyncio.gather(*coros, return_exceptions=True) try: # Use _run_async() which properly manages event loops across # CLI, gateway, and worker-thread contexts. The previous # pattern (asyncio.run() in a ThreadPoolExecutor) created a # disposable event loop that conflicted with cached # AsyncOpenAI/httpx clients bound to a different loop, # causing deadlocks in gateway mode (#2681). from model_tools import _run_async results = _run_async(_summarize_all()) except concurrent.futures.TimeoutError: logging.warning( "Session summarization timed out after 60 seconds", exc_info=True, ) return json.dumps({ "success": False, "error": "Session summarization timed out. Try a more specific query or reduce the limit.", }, ensure_ascii=False) summaries = [] for (session_id, match_info, conversation_text, _), result in zip(tasks, results): if isinstance(result, Exception): logging.warning( "Failed to summarize session %s: %s", session_id, result, exc_info=True, ) result = None entry = { "session_id": session_id, "when": _format_timestamp(match_info.get("session_started")), "source": match_info.get("source", "unknown"), "model": match_info.get("model"), } if result: entry["summary"] = result else: # Fallback: raw preview so matched sessions aren't silently # dropped when the summarizer is unavailable (fixes #3409). preview = (conversation_text[:500] + "\n…[truncated]") if conversation_text else "No preview available." entry["summary"] = f"[Raw preview — summarization unavailable]\n{preview}" summaries.append(entry) return json.dumps({ "success": True, "query": query, "results": summaries, "count": len(summaries), "sessions_searched": len(seen_sessions), }, ensure_ascii=False) except Exception as e: logging.error("Session search failed: %s", e, exc_info=True) return json.dumps({"success": False, "error": f"Search failed: {str(e)}"}, ensure_ascii=False) def check_session_search_requirements() -> bool: """Requires SQLite state database and an auxiliary text model.""" try: from hermes_state import DEFAULT_DB_PATH return DEFAULT_DB_PATH.parent.exists() except ImportError: return False SESSION_SEARCH_SCHEMA = { "name": "session_search", "description": ( "Search your long-term memory of past conversations, or browse recent sessions. This is your recall -- " "every past session is searchable, and this tool summarizes what happened.\n\n" "TWO MODES:\n" "1. Recent sessions (no query): Call with no arguments to see what was worked on recently. " "Returns titles, previews, and timestamps. Zero LLM cost, instant. " "Start here when the user asks what were we working on or what did we do recently.\n" "2. Keyword search (with query): Search for specific topics across all past sessions. " "Returns LLM-generated summaries of matching sessions.\n\n" "USE THIS PROACTIVELY when:\n" "- The user says 'we did this before', 'remember when', 'last time', 'as I mentioned'\n" "- The user asks about a topic you worked on before but don't have in current context\n" "- The user references a project, person, or concept that seems familiar but isn't in memory\n" "- You want to check if you've solved a similar problem before\n" "- The user asks 'what did we do about X?' or 'how did we fix Y?'\n\n" "Don't hesitate to search when it is actually cross-session -- it's fast and cheap. " "Better to search and confirm than to guess or ask the user to repeat themselves.\n\n" "Search syntax: keywords joined with OR for broad recall (elevenlabs OR baseten OR funding), " "phrases for exact match (\"docker networking\"), boolean (python NOT java), prefix (deploy*). " "IMPORTANT: Use OR between keywords for best results — FTS5 defaults to AND which misses " "sessions that only mention some terms. If a broad OR query returns nothing, try individual " "keyword searches in parallel. Returns summaries of the top matching sessions." ), "parameters": { "type": "object", "properties": { "query": { "type": "string", "description": "Search query — keywords, phrases, or boolean expressions to find in past sessions. Omit this parameter entirely to browse recent sessions instead (returns titles, previews, timestamps with no LLM cost).", }, "role_filter": { "type": "string", "description": "Optional: only search messages from specific roles (comma-separated). E.g. 'user,assistant' to skip tool outputs.", }, "limit": { "type": "integer", "description": "Max sessions to summarize (default: 3, max: 5).", "default": 3, }, }, "required": [], }, } # --- Registry --- from tools.registry import registry registry.register( name="session_search", toolset="session_search", schema=SESSION_SEARCH_SCHEMA, handler=lambda args, **kw: session_search( query=args.get("query") or "", role_filter=args.get("role_filter"), limit=args.get("limit", 3), db=kw.get("db"), current_session_id=kw.get("current_session_id")), check_fn=check_session_search_requirements, emoji="🔍", )