honcho/CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[2.4.2] - 2025-11-03

Fixed

• Langfuse tracing to have readable waterfalls
• Alembic Migrations to match models.py
• message_in_seq correctly included in webhook payload

Changed

• Alembic to always use a session pooler
• Statement timeout during alembic operations to 5 min

[2.4.1] - 2025-10-24

Added

• Alembic migration validation test suite

Fixed

• Alembic migrations to batch changes
• Batch message creation sequence number

Changed

• Logging infrastructure to remove noisy messages
• Sentry integration is centralized

[2.4.0] - 2025-10-09

Added

• Unified Representation class
• vllm client support
• Periodic queue cleanup logic
• WIP Dreaming Feature
• LongMemEval to Test Bench
• Prometheus Client for better Metrics
• Performance metrics instrumentation
• Error reporting to deriver
• Workspace Delete Method
• Multi-db option in test harness

Changed

• Working Representations are Queried on the fly rather than cached in metadata
• EmbeddingStore to RepresentationFactory
• Summary Response Model to use public_id of message for cutoff
• Semantic across codebase to reference resources based on observer and observed
• Prompts for Deriver & Dialectic to reference peer_id and add examples
• Get Context route returns peer card and representation in addition to messages and summaries
• Refactoring logger.info calls to logger.debug where applicable

Fixed

• Gemini client to use async methods

[2.3.3] — 2025-10-01

Changed

• Deriver Rollup Queue processes interleaved messages for more context

Fixed

• Dialectic Streaming to follow SSE conventions
• Sentry tracing in the deriver

[2.3.2] — 2025-09-25

Added

• Get peer cards endpoint (GET /v2/peers/{peer_id}/card) for retrieving targeted peer context information

Changed

• Replaced Mirascope dependency with small client implementation for better control
• Optimized deriver performance by using joins on messages table instead of storing token count in queue payload
• Database scope optimization for various operations
• Batch representation task processing for ~10x speed improvement in practice

Fixed

• Separated clean and claim work units in queue manager to prevent race conditions
• Skip locked ActiveQueueSession rows on delete operations
• Langfuse SDK integration updates for compatibility
• Added configurable maximum message size to prevent token overflow in deriver
• Various minor bugfixes

[2.3.1] - 2025-09-18

Fixed

• Added max message count to deriver in order to not overflow token limits

[2.3.0] — 2025-08-14

Added

• getSummaries endpoint to get all available summaries for a session directly
• Peer Card feature to improve context for deriver and dialectic

Changed

• Session Peer limit to be based on observers instead, renamed config value to SESSION_OBSERVERS_LIMIT
• Messages can take a custom timestamp for the created_at field, defaulting to the current time
• get_context endpoint returns detailed Summary object rather than just summary content
• Working representations use a FIFO queue structure to maintain facts rather than a full rewrite
• Optimized deriver enqueue by prefetching message sequence numbers (eliminates N+1 queries)

Fixed

• Deriver uses get_context internally to prevent context window limit errors
• Embedding store will truncate context when querying documents to prevent embedding token limit errors
• Queue manager to schedule work based on available works rather than total number of workers
• Queue manager to use atomic db transactions rather than long lived transaction for the worker lifecycle
• Timestamp formats unified to ISO 8601 across the codebase
• Internal get_context method's cutoff value is exclusive now

[2.2.0] — 2025-08-07

Added

• Arbitrary filters now available on all search endpoints
• Search combines full-text and semantic using reciprocal rank fusion
• Webhook support (currently only supports queue_empty and test events, more to come)
• Small test harness and custom test format for evaluating Honcho output quality
• Added MCP server and documentation for it

Changed

• Search has 10 results by default, max 100 results
• Queue structure generalized to handle more event types
• Summarizer now exhaustive by default and tuned for performance

Fixed

• Resolve race condition for peers that leave a session while sending messages
• Added explicit rollback to solve integrity error in queue
• Re-introduced Sentry tracing to deriver
• Better integrity logic in get_or_create API methods

[2.1.2] — 2025-07-30

Fixed

• Summarizer module to ignore empty summaries and pass appropriate one to get_context
• Structured Outputs calls with OpenAI provider to pass strict=True to Pydantic Schema

[2.1.1] — 2025-07-23

Added

• Test harness for custom Honcho evaluations
• Better support for session and peer aware dialectic queries
• Langfuse settings
• Added recent history to dialectic prompt, dynamic based on new context window size setting

Fixed

• Summary queue logic
• Formatting of logs
• Filtering by session
• Peer targeting in queries

Changed

• Made query expansion in dialectic off by default
• Overhauled logging
• Refactor summarization for performance and code clarity
• Refactor queue payloads for clarity

[2.1.0] — 2025-07-17

Added

• File uploads
• Brand new "ROTE" deriver system
• Updated dialectic system
• Local working representations
• Better logging for deriver/dialectic
• Endpoint for deriver queue status

Fixed

• Document insertion
• Session-scoped and peer-targeted dialectic queries work now

Removed

• Peer-level messages

Changed

• Dialectic chat endpoint takes a single query
• Rearranged configuration values (LLM, Deriver, Dialectic, History->Summary)

[2.0.5] - 2025-07-11

Fixed

• Groq API client to use the Async library

[2.0.4] - 2025-07-02

Fixed

• Migration/provision scripts did not have correct database connection arguments, causing timeouts

[2.0.3] - 2025-07-01

Fixed

• Bug that causes runtime error when Sentry flags are enabled

[2.0.2] - 2025-06-27

Fixed

• Database initialization was misconfigured and led to provision_db script failing: switch to consistent working configuration with transaction pooler

[2.0.1] - 2025-06-26

Added

• Ergonomic SDKs for Python and TypeScript (uses Stainless underneath)
• Deriver Queue Status endpoint
• Complex arbitrary filters on workspace/session/peer/message
• Message embedding table for full semantic search

Changed

• Overhauled documentation
• BasedPyright typing for entire project
• Resource filtering expanded to include logical operators

Fixed

• Various bugs
• Use new config arrangement everywhere
• Remove hardcoded responses

[2.0.0] - 2025-06-24

Added

• Ability to get a peer's working representation
• Metadata to all data primitives (Workspaces, Peers, Sessions, Messages)
• Internal metadata to store Honcho's state no longer exposed in API
• Batch message operations and enhanced message querying with token and message count limits
• Search and summary functionalities scoped by workspace, peer, and session
• Session context retrieval with summaries and token allocation
• HNSW Index for Documents Table
• Centralized Configuration via Environment Variables or config.toml file

Changed

• API route is now /v2/
• New architecture centered around the concept of a "peer" replaces the former "app"/"user"/"session" paradigm
• Workspaces replace "apps" as top-level namespace
• Peers replace "users"
• Sessions no longer nested beneath peers and no longer limited to a single user-assistant model. A session exists independently of any one peer and peers can be added to and removed from sessions.
• Dialectic API is now part of the Peer, not the Session
• Dialectic API now allows queries to be scoped to a session or "targeted" to a fellow peer
• Database schema migrated to adopt workspace/peer/session naming and structure
• Authentication and JWT scopes updated to workspace/peer/session hierarchy
• Queue processing now works on 'work units' instead of sessions
• Message token counting updated with tiktoken integration and fallback heuristic
• Queue and message processing updated to handle sender/target and task types for multi-peer scenarios

Fixed

• Improved error handling and validation for batch message operations and metadata
• Database Sessions to be more atomic to reduce idle in transaction time

Removed

• Metamessages removed in favor of metadata
• Collections and Documents no longer exposed in the API, solely internal
• Obsolete tests for apps, users, collections, documents, and metamessages

[1.1.0] - 2025-05-15

Added

• Normalize resources to remove joins and increase query performance
• Query tracing for debugging

Changed

• /list endpoints to not require a request body
• metamessage_type to label with backwards compatability
• Database Provisioning to rely on alembic
• Database Session Manager to explicitly rollback transactions before closing the connection

Fixed

• Alembic Migrations to include initial database migrations
• Sentry Middleware to not report Honcho Exceptions

[1.0.0] - 2025-04-10

Added

• JWT based API authentication
• Configurable logging
• Consolidated LLM Inference via ModelClient class
• Dynamic logging configurable via environment variables

Changed

• Deriver & Dialectic API to use Hybrid Memory Architecture
• Metamessages are not strictly tied to a message
• Database provisioning is a separate script instead of happening on startup
• Consolidated session/chat and session/chat/stream endpoints

[0.0.16] - 2025-03-05

Added

• Detailed custom exceptions for better error handling
• CLAUDE.md for claude code

Changed

• Deriver to use a new cognitive architecture that only updates on user messages and updates user representation to apply more confidence scores to its known facts
• Dialectic API token cutoff from 150 tokens to 300
• Dialectic API uses Claude 3.7 Sonnet
• SQLAlchemy echo changed to false by default, can be enabled with SQL_DEBUG environment flag

Fixed

• Self-hosting documentation and README to mention uv instead of poetry

[0.0.15] - 2025-01-06

Added

• Alembic for handling database migrations
• Additional indexes for reading Messages and Metamessages
• Langfuse for prompt tracing

Changed

• API validation using Pydantic

Fixed

• Dialectic Streaming Endpoint properly sends text in StreamingResponse
• Deriver Queue handles graceful shutdown

[0.0.14] — 2024-11-14

Changed

• Query Documents endpoint is a POST request for better DX
• String columns are now TEXT columns to match postgres best practices
• Docstrings to have better stainless generations

Fixed

• Dialectic API to use most recent user representation
• Prepared Statements Transient Error with psycopg
• Queue parallel worker scheduling

[0.0.13] — 2024-11-07

Added

• Ability to clone session for a user to achieve more loom-like behavior

[0.0.12] — 2024-10-21

Added

• GitHub Actions Testing
• Ability to disable derivations on a session using the deriver_disabled flag in a session's metadata
• /v1/ prefix to all routes
• Environment variable to control deriver workers

Changed

• public_ids to use NanoID and internal ID to use BigInt
• Dialectic Endpoint can take a list of queries
• Using uv for project management
• User Representations stored in a metamessage rather than using reserved collection
• Base model for Dialectic API and Deriver is now Claude 3.5 Sonnet
• Paginated GET requests now POST requests for better developer UX

Removed

• Mirascope Dependency
• Slowapi Dependency
• Opentelemetry Dependencies and Setup

[0.0.11] — 2024-08-01

Added

• session_id column to QueueItem Table
• ActiveQueueSession Table to track, which sessions are being actively processed
• Queue can process multiple sessions at once

Changed

• Sessions do not require a location_id
• Detailed printing using rich

[0.0.10] — 2024-07-23

Added

• Test cases for Storage API
• Sentry tracing and profiling
• Additional Error handling

Changed

• Document API uses same embedding endpoint as deriver
• CRUD operations use one less database call by removing extra refresh
• Use database for timestampz rather than API
• Pydantic schemas to use modern syntax

Fixed

• Deriver queue resolution

[0.0.9] — 2024-05-16

Added

• Deriver to docker compose
• Postgres based Queue for background jobs

Changed

• Deriver to use a queue instead of supabase realtime
• Using mirascope instead of langchain

Removed

• Legacy SDKs in preference for stainless SDKs

[0.0.8] — 2024-05-09

Added

• Documentation to OpenAPI
• Bearer token auth to OpenAPI routes
• Get by ID routes for users and collections
• NodeJS SDK support

Changed

• Authentication Middleware now implemented using built-in FastAPI Security module
• Get by name routes for users and collections now include "name" in slug
• Python SDK moved to separate respository

Fixed

• Error reporting for methods with integrity errors due to unique key constraints

[0.0.7] — 2024-04-01

Added

• Authentication Middleware Interface

[0.0.6] — 2024-03-21

Added

• Full docker-compose for API and Database

Fixed

• API Response schema removed unnecessary fields
• OTEL logging to properly work with async database engine
• fly.toml default settings for deriver set auto_stop=false

Changed

• Refactored API server into multiple route files

[0.0.5] — 2024-03-14

Added

• Metadata to all data primitives (Users, Sessions, Messages, etc.)
• Ability to filter paginated GET requests by JSON filter based on metadata
• Optional Sentry error monitoring
• Optional Opentelemetry logging
• Dialectic API to interact with honcho agent and get insights about users
• Automatic Fact Derivation Script for automatically generating simple memory

Changed

• API Server now uses async methods to make use of benefits of FastAPI

[0.0.4] — 2024-02-22

Added

• apps table with a relationship to the users table
• users table with a relationship to the collections and sessions tables
• Reverse Pagination support to get recent messages, sessions, etc. more easily
• Linting Rules

Changed

• Get sessions method returns all sessions including inactive
• using timestampz instead of timestamp

[0.0.3] — 2024-02-15

Added

• Collections table to reference a collection of embedding documents
• Documents table to hold vector embeddings for RAG workflows
• Local scripts for running a postgres database with pgvector installed
• OpenAI Dependency for embedding models
• PGvector dependency for vector db support

Changed

• session_data is now metadata
• session_data is a JSON field used python dict for compatability

[0.0.2] — 2024-02-01

Added

• Pagination for requests via fastapi_pagination
• Metamessages
• get_message routes
• created_at field added to each Table
• Message size limits

Changed

• IDs are now UUIDs
• default rate limit now 100 requests per minute

Removed

• Removed messages from session response model

[0.0.1] — 2024-02-01

Added

• Rate limiting of 10 requests for minute
• Application level scoping