---
title: "Changelog"
icon: "clock-rotate-left"
---

Welcome to the Honcho changelog! This section documents all notable changes to the Honcho API and SDKs.


<Accordion title="How to Read This Changelog">
    Each release is documented with:

    - **Added**: New features and capabilities
    - **Changed**: Modifications to existing functionality
    - **Deprecated**: Features that will be removed in future versions
    - **Removed**: Features that have been removed
    - **Fixed**: Bug fixes and corrections
    - **Security**: Security-related improvements

    ## Version Format

    Honcho follows [Semantic Versioning](https://semver.org/):
    - **MAJOR** version for incompatible API changes
    - **MINOR** version for backwards-compatible functionality additions
    - **PATCH** version for backwards-compatible bug fixes
</Accordion>

### Honcho API and SDK Changelogs
<Tabs>
    <Tab title="Honcho API">
        <Update label="v3.0.11 (Current)">
        ### Added

        - `api_request_duration_seconds` Prometheus histogram tracking per-route request latency, labeled by method and endpoint (#837)
        - LLM `provider_params` passthroughs (`extra_body` / `extra_headers` / `extra_query`) are now forwarded to the underlying provider transport across all backends, with shape validation that rejects non-mapping values (#821)
        - `structured_output_mode` model-config option to use `json_object` mode for OpenAI-compatible providers that lack native Structured Outputs support (used by the deriver) (#820)
        - OpenRouter app-attribution headers (`HTTP-Referer` / `X-Openrouter-Title`) are now sent on OpenAI-compatible clients when the configured base URL is OpenRouter, so requests are attributed to "Honcho" in OpenRouter's dashboard (#805)
        - Langfuse traces are now tagged with user and session IDs for easier trace filtering (#814)
        - `DERIVER_REPRESENTATION_BATCH_MAX_AGE_SECONDS` (default 1800s) lets sub-threshold representation work units flush once their oldest unprocessed queue item ages out. Set it to `0` to keep the legacy behavior where sub-threshold tails wait indefinitely unless `DERIVER_FLUSH_ENABLED=true` (#826)
        - Conclusion responses now include a `level` field (`explicit`, `deductive`, `inductive`, `contradiction`); list/query endpoints support filtering by `level` via `filters`, with reserved filter keys protected from being overridden by user-supplied filters (#851)

        ### Changed

        - Peer-scoped JWTs now get read-only access to the sessions their peer is an active member of (session context, summaries, peers, their own per-session config, search, and message reads). Session-scoped JWTs remain confined to their session and cannot reach peer routes (#679)
        - Compacted Honcho's log output, with guarded ms/s metric formatting that falls back to a plain string for non-numeric values (#836)
        - Sentry now drops noisy infra/scrape transactions: the reconciler opens a transaction only once a batch has rows (idle cycles emit none), and a `traces_sampler` returns `0.0` for `/metrics`, `/health`, `/openapi.json`, `/docs`, `/redoc`, and the deriver metrics server. `SENTRY.TRACES_SAMPLE_RATE` still governs real traffic (#834)

        ### Fixed

        - Peer- and session-scoped JWTs were effectively workspace-scoped: authorization walked the route's declared scope and fell through to a workspace match, so a `{w, p: alice}` token could act on any peer in the workspace. JWTs are now authorized by their narrowest claim and never widen to workspace access (#679)
        - The keys API now rejects creating a peer- or session-scoped key without a workspace. Such keys were minted successfully but failed verification on every request (#679)
        - Agent-supplied observation IDs carrying the display-format `id:` prefix are now normalized (prefix and trailing whitespace stripped) before `source_ids` are stored and on `get_reasoning_chain` lookups, fixing corrupted provenance links and broken reasoning-chain traversal (#795)
        - Fixed a `create_tree` keyword-argument mismatch in the Dreamer's surprisal tree construction (#749)
        - Providers that omit output-token counts (observed with Gemini on tool-loop completions) returned `output_tokens=None`, which raised a Pydantic validation error that aborted the call and crashed the Dreamer's induction phase before inductive conclusions were persisted. `None` is now coerced to `0` so token accounting degrades gracefully (#809)
        - Document creation now performs exact (case-insensitive, whitespace-trimmed) content deduplication before the existing semantic dedup step: exact duplicates within a batch collapse to a single insert, and an exact match against a live document reinforces it (atomic `times_derived` increment) instead of creating a new row (#861)
        </Update>

        <Update label="v3.0.10">
        ### Added

        - Messages are now embedded via a background task rather than blocking API request
        - Read-only DB session mode (`get_read_db` / `tracked_db(..., read_only=True)`) so reads don't hold a transaction open across the work
        - `CORS_ORIGINS` env var to configure CORS allowed origins without editing source; defaults match the prior hardcoded list, so self-hosted deployments behind custom domains can whitelist their frontend (#697)
        - `scripts/generate_jwt.py` — utility for minting scoped or admin Honcho JWTs (`--admin`, `--workspace`/`--peer`/`--session`, `--expires` with human-friendly durations, `--print-only`) without calling the keys API (#757)
        - `STALE_WORK_UNIT_CLEANUP_INTERVAL_SECONDS` (default 60s) — minimum jittered spacing between deriver stale-work-unit cleanup runs, so cleanup no longer runs on every seconds-scale poll (`0.0` keeps the legacy every-poll behavior) (#773)

        ### Changed

        - Optimized the deriver and dreamer prompt cache prefixes to improve prompt-cache hit rates (#806)

        ### Fixed

        - `times_derived` is now properly reinforced when a duplicate conclusion is detected. It had been pinned at 1 for nearly every conclusion (the reject-new branch dropped the increment and the new-wins branch reset the count to 1), so `ORDER BY times_derived DESC` fell back to arbitrary heap order and froze stale conclusions to the front of injected context. Reinforcement is now an atomic increment and both most-derived queries gained a `created_at DESC` recency tiebreaker (#768)
        - Webhook creation now correctly rejects private/internal IP addresses (#793)
        </Update>

        <Update label="v3.0.9">
        ### Changed

        - Connection acquisition is now a single attempt with no server-side retry, on a vanilla `AsyncSession`. A new `DB_CONNECT_TIMEOUT_SECONDS` (default 2s) bounds the attempt so a saturated or unreachable pooler fails fast instead of holding a client connection open to re-knock. A saturated DB now surfaces to the caller — the API returns an error and the deriver backs off and retries on a later poll — which lets the pooler drain rather than amplifying saturation.

        ### Added

        - Deriver poll jitter so instances that start together don't poll in lockstep: `DERIVER_POLLING_STARTUP_JITTER_SECONDS` (random delay before the first poll, default 30s) and `DERIVER_POLLING_JITTER_RATIO` (±fraction applied to every poll sleep, default 0.5). Both disable at `0.0`; the underlying backoff schedule is unchanged.

        ### Removed

        - Reverted the connection-checkout retry and `HonchoAsyncSession` custom session introduced in 3.0.8. Removed the `DB_CONNECTION_RETRY_ENABLED` / `DB_CONNECTION_RETRY_MAX_DELAY_SECONDS` / `DB_CONNECTION_RETRY_BACKOFF_INITIAL_SECONDS` / `DB_CONNECTION_RETRY_BACKOFF_MAX_SECONDS` settings, the `db_connection_acquisitions{outcome=...}` Prometheus counter, and the `db.pool.acquire` Sentry span. Alerting built on `db_connection_acquisitions` should migrate to `db_pool_connections` / `db_queries_in_flight`.
        </Update>

        <Update label="v3.0.8">
        ### Added

        - Connection-checkout retry with bounded exponential backoff (tenacity) on `get_db`/`tracked_db`: transient transaction-pooler (Supavisor) rejections — SQLAlchemy `TimeoutError` and `OperationalError` — now retry with backoff instead of surfacing as 500s under client-connection saturation. Gated by
          `DB_CONNECTION_RETRY_ENABLED` with configurable delay/backoff knobs; ~10s default budget (#758)
        - `HonchoAsyncSession` — a lazy `AsyncSession` that checks out its pooled connection (with retry) on the first DB-touching call rather than at construction. Request handlers doing non-DB work (embedding, file, LLM) before their first query no longer pin a pooler connection across it. Only the checkout is retried;
          the statement still runs exactly once, so writes are never duplicated (#758)
        - Adaptive deriver queue polling: the poll interval backs off when the queue is idle or erroring (base → max, doubling each cycle) and snaps back to base the moment work is claimed, cutting steady-state query load against the DB. Gated by `DERIVER_POLLING_BACKOFF_ENABLED` with configurable max/multiplier (#758)
        - New Prometheus `db_pool_connections` gauge (checked_out / checked_in / size / overflow), labeled `api`|`deriver`, registered in both the API lifespan and the deriver metrics server (#758)
        - New Prometheus `db_connection_acquisitions{outcome=ok|retried|exhausted}` counter — the alertable early-warning signal that connection checkouts are retrying through pooler rejection, before requests start failing (#758)
        - New Prometheus `db_queries_in_flight` gauge — statements actually executing on the wire (via SQLAlchemy cursor-execute events). Paired with `checked_out`, the gap reveals connections held but parked (the "idle in transaction during an external call" antipattern). Gated on `METRICS.ENABLED` for zero overhead when
          off (#758)
        - Explicit `SqlalchemyIntegration` in both the API and deriver Sentry inits; connection acquisition wrapped in a `db.pool.acquire` span with live pool stats captured on retry exhaustion (#758)

        ### Changed

        - Default `POOL_TIMEOUT` lowered to 5s, with validation that it stays under the connection-retry budget when a pooled (non-null) `POOL_CLASS` is configured; `config.toml.example` and the v2/v3 configuration docs updated to match (#758)
        - `HonchoAsyncSession` wraps every DB-touching session method (execute / scalar / scalars / flush / merge / refresh / commit / get / get_one / stream / stream_scalars / delete) so the lazy-checkout-with-retry guarantee has no holes; the acquired flag resets on `close()`/`reset()` so a reused session re-acquires on
          next use (#758)

        ### Fixed

        - Roll the session back on a retryable checkout failure before retrying — a failed autobegin could otherwise leave it pending-rollback, making the next connection attempt raise instead of cleanly re-checking-out (#758)
        - Guard `DBPoolCollector.collect()` so a pool-read/import hiccup can't raise and abort the entire `/metrics` scrape (Prometheus drops all metrics if any collector raises) (#758)
        - Clamp the pool overflow gauge to ≥ 0 (it could report negative before the pool fills) (#758)
        - Removed a double-sleep in the deriver idle poll so the backoff cap is a true cap rather than 2× (#758)
        </Update>

        <Update label="v3.0.7">
        ### Added

        - New `src/llm/` package as the single owner of provider runtime: clients, backends, history adapters, tool loop, request builder, credentials, and caching policy (#459)
        - New cloudevent `LLMCallCompletedEvent` (`llm.call.completed`) fires once per provider hit with full cost-attribution context: transport/provider_label, model, token counts with cache breakdown, finish_reason, outcome, retry/fallback state, duration, tool-call shape, streaming flag, and agent correlation (`run_id` + iteration) (#637)
        - `RepresentationCompletedEvent` now carries `total_input_tokens` for full-trace cost attribution; per-emitter `honcho_version` injection; deterministic per-`run_id` high-volume sampler via `TelemetrySettings.HIGH_VOLUME_SAMPLE_RATE` (#637)
        - Deriver custom instructions: per-workspace/peer guidance threaded into the deriver prompt with a `MAX_CUSTOM_INSTRUCTIONS_TOKENS` budget (default 2000); deriver `MAX_INPUT_TOKENS` raised 23000 → 25000 (#609)
        - Configurable embedding dimensions: `EMBEDDING_MODEL_CONFIG__DIMENSIONS_MODE` (`auto`/`always`/`never`) controls whether OpenAI `dimensions=` is forwarded (#678)
        - New `honcho-cli` package — Python CLI for inspecting and managing peers, sessions, and configuration against a Honcho deployment (#424)
        - `HONCHO_API_URL` env var support in the MCP Worker for self-hosted deployments (#575)
        - API ID `max_length` increased from 100 to 512 across `WorkspaceCreate`, `PeerCreate`, and `SessionCreate` to align with the DB schema (#684)
        - `AttemptPlan` dataclass pins per-retry provider selection across stream-final retries so streaming doesn't bounce back to primary after the tool loop has settled on fallback (#459)
        - Gemini JSON-schema sanitizer for `function_declarations` — strips keywords Gemini's validator rejects while preserving semantics for other backends (#459)

        ### Changed

        - All LLM orchestration moved out of `src/utils/clients.py` into `src/llm/` with modules split by responsibility (#459)
        - Default `ModelConfig` factories (deriver, summary, dreamer specialists, dialectic levels) normalized with no extra parameters set by default; operators add transport/thinking overrides explicitly (#459)
        - OpenAI reasoning-model routing widened to cover `gpt-5.x` and `o1/o3/o4` — these models receive `max_completion_tokens` instead of `max_tokens` (#459)
        - Peer card prompts reframed as stable identity markers; induction specialist now opts out of peer card writes so only deduction touches the card (#686)
        - Vector store queries no longer fetch embedding vectors — only document metadata is returned, reducing payload size and DB load (pgvector, lancedb, turbopuffer) (#682)
        - Langfuse trace metadata now includes `namespace`, `model`, and `provider` so traces can be filtered by deployment slice (#565)
        - Deriver: model-aware tokenizer (replaces the previously hardcoded encoding) and explicit guard on empty message content (#647)
        - Dialectic level defaults now merge correctly with per-level overrides (#656)
        - Default dialectic tool choice switched to `auto` (#630)
        - Vector sync given a substantial retry budget to tolerate transient embedding provider outages (#604)
        - `AgentToolConclusionsDeletedEvent` payload now carries `levels` (#612)
        - Turbopuffer: `InternalServerError` caught and surfaced as a warning rather than a hard failure; vector store sync errors downgraded to warnings (#561)

        ### Fixed

        - `reverse` query parameter is now honored on the v3 workspace list, peer list, workspace-scoped session list, and peer-scoped session list. Honcho SDKs at 2.1.0+ were already sending `reverse=true` for these routes but the server silently ignored it. Ties on `created_at` now fall back to the internal nanoid `id` for stable ordering across pages (#685)
        - LLM client factories now receive `base_url` from `LLMSettings` for default providers — operators pointing at OpenAI-compatible proxies via `LLM__OPENAI_BASE_URL` were previously ignored on the default path (#643, fixes #641)
        - Internal N+1 query in dialectic agent tool execution — collapsed per-iteration DB lookups into a single fetch (#652)
        - Dreamer threshold and time-guard semantics: count filter now includes only `documents.level == 'explicit'` (was inflating threshold via dreamer-created levels and creating a feedback loop); `last_dream_at` write relocated from enqueue to process so duplicate enqueues or failed runs no longer reset the 8-hour time guard (#573)
        - Deriver: blank observations are filtered out before embedding (previously triggered noisy embedding calls and persisted empty rows) (#615)
        - Surprisal module: filter format corrected from `{"level": levels}` to `{"level": {"in": levels}}` — the prior call silently returned 0 results and made the entire Surprisal phase of the Dream cycle a no-op (#581, fixes #559)
        - Removed hardcoded `stop_sequences` override from Deriver `ModelConfig` (was clobbering operator-configured stop sequences) (#587)
        - Embedding client: `embed()` now wraps single-string input in an array, restoring compatibility with OpenAI-compatible third-party providers that reject scalar input (#586)
        - Docker Compose: deriver service startup gated on the API service healthcheck — prevents races where the deriver starts before the API has run migrations (#689)
        - Docker image: `HEALTHCHECK` directive removed from the shared base image; service-level health checks now belong in each service's own configuration (#530)
        - Removed strict parameter validation for thinking params on Anthropic and OpenAI transports — was rejecting valid per-transport configs (#686)
        - Stream-final retries pin to the `AttemptPlan` that succeeded rather than re-running provider selection through the outer `current_attempt` ContextVar (#459)
        - Gemini `cached_content` reuse keys now include `system_instruction` and `tool_config` so cache hits don't cross configurations (#459)
        - CrewAI example updated for the latest CrewAI protocol (#631)

        ### Removed

        - `src/utils/clients.py` deleted; its responsibilities are split across `src/llm/registry.py`, `src/llm/credentials.py`, and the backend-specific modules (#459)
        - `HEALTHCHECK` directive from the shared Docker image (#530)
        </Update>

        <Update label="v3.0.6">
        ### Changed

        - Tightened transaction scopes across search, agent tools, queue manager, and webhook delivery to minimize DB connection hold time during external operations (#525)
        - Search operations refactored to two-phase pattern — external work (embeddings, LLM calls) completes before opening a transaction (#525)
        - Agent tool executor performs external operations before acquiring DB sessions (#525)
        - Queue manager transaction scope reduced to only the critical section (#525)
        - Webhook delivery no longer holds a DB session parameter (#525)

        ### Fixed

        - Session leakage in non-session-scoped dialectic chat calls (#526)

        ### Added

        - Health check endpoint (`/health`) for container orchestration and load balancer probes (#510)
        </Update>

        <Update label="v3.0.5">
        ### Fixed

        - explicit rollback on all transactions to force connection closed
        </Update>

        <Update label="v3.0.4">
        ### Added

        - JSONB metadata validation enforces 100 key limit and max depth of 5 (#419)

        ### Changed

        - Schemas refactored from single `schemas.py` into `schemas/api.py`, `schemas/configuration.py`, and `schemas/internal.py` with backwards-compatible re-exports (#419)

        ### Fixed

        - Missing `deleted_at` filter on `RepresentationManager._query_documents_recent()` and `._query_documents_most_derived()` allowed soft-deleted documents to leak into the deriver's working representation (#456)
        - `CleanupStaleItemsCompletedEvent` emitted spuriously when no queue item was actually deleted (#454)
        - Empty JSON file uploads caused unhandled errors; now returns normalized error responses (#434)
        - Memory leak: `_observation_locks` switched to `WeakValueDictionary` to prevent unbounded growth (#419)
        - SQL injection in `dependencies.py`: parameterized `set_config` calls to prevent injection via request context (#419)
        - NUL byte crashes: string inputs (message content, queries, peer cards) now stripped at schema level (#419)
        - Filter recursion depth capped at 5 to prevent stack overflow (#419)
        - Dedup-skipped observations now correctly reflected in created counts (#477)
        - External vector store support for message search — routes queries through configured external vector store with oversampling and
          deduplication to handle chunked embeddings (#479)
        - Dialectic agent no longer holds a DB connection during LLM calls — embeddings are pre-computed before tool execution, DB sessions isolated in `extract_preferences`, `query_documents` no longer accepts a DB session parameter (#477)
        </Update>
        <Update label="v3.0.3">
        ### Added

        - Consolidated session context into a single DB session with 40/60 token budget allocation between summary and messages
        - Observation validation via `ObservationInput` Pydantic schema with partial-success support and batch embedding with per-observation fallback
        - Peer card hard cap of 40 facts with case-insensitive deduplication and whitespace normalization
        - Safe integer coercion (`_safe_int`) for all LLM tool inputs to handle non-integer values like `"Infinity"`
        - Embedding pre-computation and reuse across multiple search calls in dialectic and representation flows
        - Peer existence validation in dialectic chat endpoints — raises ResourceNotFoundException instead of silently failing
        - Logging filter to suppress noisy `GET /metrics` access logs
        - Oolong long-context aggregation benchmark (synth and real variants, 1K–4M token context windows)
        - MolecularBench fact quality evaluation (ambiguity, decontextuality, minimality scoring)
        - CoverageBench information recall evaluation (gold fact extraction, coverage matching, QA verification)
        - LoCoMo summary-as-context baseline evaluation
        - Webhook delivery tests, dependency lifecycle tests, queue cleanup tests, summarizer fallback tests
        - Parallel test execution via pytest-xdist with worker-specific databases
        - `test_reasoning_levels.py` script for LOCOM dataset testing across reasoning levels

        ### Changed

        - Workspace deletion is now async — returns 202 Accepted, validates no active sessions (409 Conflict), cascade-deletes in background
        - Redis caching layer now stores plain-dict instead of ORM objects, with v2-prefixed keys, storage, resilient `safe_cache_set`/`safe_cache_delete` helpers, and deferred post-commit cache invalidation
        - All `get_or_create_*` CRUD operations now use savepoints (`db.begin_nested()`) instead of commit/rollback for race condition prevention
        - Reconciler vector sync uses direct ORM mutation instead of batch parameterized UPDATE statements
        - Summarizer enforces hard word limit in prompt and creates fallback text for empty summaries with `summary_tokens = 0`
        - Blocked Gemini responses (SAFETY, RECITATION, PROHIBITED_CONTENT, BLOCKLIST) now raise `LLMError` to trigger retry/backup-provider logic
        - Gemini client explicitly sets `max_output_tokens` from `max_tokens` parameter
        - All deriver and metrics collector logging replaced with structured `logging.getLogger(__name__)` calls
        - Dreamer specialist prompts updated to enforce durable-facts-only peer cards with max 40 entries and deduplication
        - `GetOrCreateResult` changed from `NamedTuple` to `dataclass` with `async post_commit()` method
        - FastAPI upgraded from 0.111.0 to 0.131.0; added pyarrow dependency
        - Queue status filtering to only show user-facing tasks (representation, summary, dream); excludes internal infrastructure tasks

        ### Fixed

        - JWT timestamp bug — `JWTParams.t` was evaluated once at class definition time instead of per-instance
        - Session cache invalidation on deletion was missing
        - `get_peer_card()` now properly propagates `ResourceNotFoundException` instead of swallowing it
        - `set_peer_card()` ensures peer exists via `get_or_create_peers()` before updating
        - Backup provider failover with proper tool input type safety
        - Removed `setup_admin_jwt()` from server startup
        - Sentry coroutine detection switched from `asyncio.iscoroutinefunction` to `inspect.iscoroutinefunction`

        ### Removed

        - `explicit.py` and `obex.py` benchmarks replaced by coverage.py and molecular.py
        - Claude Code review automation workflow (`.github/workflows/claude.yml`)
        - Coverage reporting from default pytest configuration
        </Update>

        <Update label="v3.0.2">
        ### Added

        - Documentation for reasoning_level and Claude Code plugin

        ### Changed

        - Gave dreaming sub-agents better prompting around peer card creation, tweaked overall prompts

        ### Fixed

        - Added message-search fallback for memory search tool, necessary in fresh sessions
        - Made FLUSH_ENABLED a config value
        - Removed N+1 query in search_messages
        </Update>

        <Update label="v3.0.1">
        ### Fixed

        - Token counting in Explicit Agent Loop
        - Backwards compatibility of queue items
        </Update>

        <Update label="v3.0.0">
        ### Added

        - Agentic Dreamer for intelligent memory consolidation using LLM agents
        - Agentic Dialectic for query answering using LLM agents with tool use
        - Reasoning levels configuration for dialectic (`minimal`, `low`, `medium`, `high`, `max`)
        - Prometheus token tracking for deriver and dialectic operations
        - n8n integration
        - Cloud Events for auditable telemetry
        - External Vector Store support for turbopuffer and lancedb with reconciliation flow

        ### Changed

        - API route renaming for consistency
        - Dreamer and dialectic now respect peer card configuration settings
        - Observations renamed to Conclusions across API and SDKs
        - Deriver to buffer representation tasks to normalize workloads
        - Local Representation tasks to create singular QueueItems
        - getContext endpoint to use `search_query` rather than force `last_user_message`

        ### Fixed

        - Dream scheduling bugs
        - Summary creation when start_message_id > end_message_id
        - Cashews upgrade to prevent NoScriptError
        - Memory leak in `accumulate_metric` call

        ### Removed

        - Peer card configuration from message configuration; peer cards no longer created/updated in deriver process
        </Update>

        <Update label="v2.5.1">
        ### Fixed

        - Backwards compatibility for `message_ids` field in documents to handle legacy tuple format
        </Update>

        <Update label="v2.5.0">
        ### Added

        - Message level configurations
        - CRUD operations for observations
        - Comprehensive test cases for harness
        - Peer level get_context
        - Set Peer Card Method
        - Manual dreaming trigger endpoint

        ### Changed

        - Configurations to support more flags for fine-grained control of the deriver, peer cards, summaries, etc.
        - Working Representations to support more fine-grained parameters

        ### Fixed

        - File uploads to match `MessageCreate` structure
        - Cache invalidation strategy
        </Update>

        <Update label="v2.4.3">
        ### Added

        - Redis caching to improve DB IO
        - Backup LLM provider to avoid failures when a provider is down

        ### Changed

        - QueueItems to use standardized columns
        - Improved Deduplication logic for Representation Tasks
        - More finegrained metrics for representation, summary, and peer card tasks
        - DB constraint to follow standard naming conventions
        </Update>

        <Update label="v2.4.2">
        ### 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
        </Update>

        <Update label="v2.4.1">
        ### 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
        </Update>

        <Update label="v2.4.0">
        ### 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

        </Update>

        <Update label="v2.3.3">
        ### Changed

        - Deriver Rollup Queue processes interleaved messages for more context

        ### Fixed

        - Dialectic Streaming to follow SSE conventions
        - Sentry tracing in the deriver
        </Update>

        <Update label="v2.3.2">
        ### 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
        </Update>
        <Update label="v2.3.1">
        ### Fixed

        - Added max message count to deriver in order to not overflow token limits
        </Update>
        <Update label="v2.3.0">
        ### 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
        </Update>
        <Update label="v2.2.0">
        ### 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
        </Update>


        <Update label="v2.1.2">
        ### 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
        </Update>


        <Update label="v2.1.1">
        ### 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
        </Update>

        <Update label="v2.1.0">
        ### Added

        - File uploads
        - Brand new "ROTE" deriver system
        - Updated dialectic system
        - Local working representations
        - Better logging for deriver/dialectic
        - Deriver Queue Status no longer has redundant data

        ### Fixed

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

        ### Removed

        - Peer-level messages

        ### Changed

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

        <Update label="v2.0.5">
        ### Fixed

        - Groq API client to use the Async library
        </Update>

        <Update label="v2.0.4">
        ### Fixed

        - Migration/provision scripts did not have correct database connection arguments, causing timeouts
        </Update>

        <Update label="v2.0.3">
        ### Fixed

        - Bug that causes runtime error when Sentry flags are enabled
        </Update>

        <Update label="v2.0.2">
        ### Fixed

        - Database initialization was misconfigured and led to provision_db script failing: switch to consistent working configuration with transaction pooler
        </Update>

        <Update label="v2.0.1">
        ### 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
        </Update>

        <Update label="v2.0.0">
        ### 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 allocatio
        - HNSW Index for Documents Table
        - Centralized Configuration via Environment Variables or config.toml file

        ### Changed

        - 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
        ---
        </Update>

        <Update label="v1.1.0">
        ### 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 compatibility
        - 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
        </Update>

        <Update label="v1.0.0">
        ### 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
        </Update>

        ## Previous Releases

        For a complete history of all releases, see our [GitHub Releases](https://github.com/plastic-labs/honcho/tags) page.
    </Tab>

    <Tab title="Python SDK">
        [Python SDK](https://pypi.org/project/honcho-ai/)
        <Update label="v2.2.0">
        ### Added

        - `ConclusionLevel` type (`explicit`, `deductive`, `inductive`, `contradiction`) and a `level` field on `Conclusion`, exposing the reasoning level the server already tracked but previously stripped from responses.
        - `filters` parameter on `ConclusionScope.list()` and `ConclusionScope.query()` (sync and async), passed through to the same dynamic server-side filter logic as `peers()`/`sessions()`/`messages()`. Filter explicit-only conclusions with `filters={"level": "explicit"}`, or by any other supported field/operator. Requires a Honcho server with the matching API support (Honcho v3.0.11+).

        ### Fixed

        - Scope-managed filter keys (`observer`, `observed`, `session`) are now rejected with a clear `ValueError` if passed in `filters`, instead of silently overriding the scope and returning conclusions from a different peer pair. Use `peer.conclusions` / `conclusions_of(target)` and the `session=` parameter instead. `session_id` remains a valid filter on `query()`.
        </Update>
        <Update label="v2.1.2">
        ### Added

        - `page`, `size`, and `reverse` pagination parameters on `Honcho.workspaces()` and `HonchoAio.workspaces()`, closing the gap from 2.1.0 which added these to other list methods but not to `workspaces()`. Honoring `reverse` on the workspace/peer/session list routes also requires a Honcho server with the matching API fix; older servers silently ignore the parameter.
        - `peers` parameter on `Honcho.session()` and `HonchoAio.session()` — attach peers to a session at creation time instead of needing a follow-up `session.add_peers()` call. Accepts the same shapes as `Session.add_peers` (peer ID string, `Peer` object, list of either, or tuples with `SessionPeerConfig`).

        ### Changed

        - `WorkspaceCreateParams`, `PeerCreateParams`, and `SessionCreateParams` now accept IDs up to 512 characters (was 100), matching the server-side schema change in Honcho v3.0.7.
        </Update>
        <Update label="v2.1.1">
        ### Fixed

        - Broadened HTTP retry logic to cover `httpx.NetworkError` and `httpx.RemoteProtocolError` in addition to `httpx.TimeoutException` and `httpx.ConnectError`, improving resilience against transient network failures
        </Update>
        <Update label="v2.1.0">
        ### Added

        - `created_at` property on `Peer` and `Session` objects
        - `is_active` property on `Session` objects
        - `get_message(message_id)` method on `Session` (sync and async) to fetch a single message by ID
        - `page`, `size`, and `reverse` pagination parameters on all list methods

        ### Changed

        - **Breaking**: `peer()` and `session()` now always make a get-or-create API call — no more lazy initialization
        - Response configuration models now tolerate unknown fields from newer servers for forward compatibility

        ### Fixed

        - Sync and async `Session.get_metadata()`, `get_configuration()`, and `refresh()` now refresh cached `created_at` and `is_active` values along with metadata and configuration
        - `honcho.__version__` now derives from package metadata, with a source-checkout fallback, so it stays aligned with released package versions
        </Update>
        <Update label="v2.0.2">
        ### Changed

        - All input models now reject unknown fields via strict Pydantic validation (`extra="forbid"`). Previously, misspelled or extraneous fields were silently ignored. Now a `ValidationError` is raised with the unrecognized field name.
        </Update>
        <Update label="v2.0.1">
            ### Added

        - `set_peer_card` method

        ### Changed

        - `card` is now `get_card` with `card` kept for backwards compatibility and marked as deprecated
        </Update>
        <Update label="v2.0.0">
        ### Added

        - `ConclusionScope` object for CRUD operations on conclusions (renamed from observations)
        - Representation configuration support

        ### Changed

        - Observations renamed to Conclusions across the SDK
        - Major SDK refactoring and cleanup
        - Simplified method signatures throughout
        - Representation endpoints now return `string` instead of old Representation object

        ### Removed

        - Standalone types module (now uses honcho-core types)
        - Representation object
        </Update>
        <Update label="v1.6.0">
            ### Added

            - metadata and configuration fields to Workspace, Peer, Session, and Message objects
            - Session Clone methods
            - Peer level get_context method
            - `ObservationScope` object to perform CRUD operations on observations
            - Representation object for WorkingRepresentations

            ### Changed

            - methods that take IDs, can all optionally take an object of the same type
        </Update>
        <Update label="v1.5.0">
        ### Added

        - Delete workspace method

        ### Changed

        - message_id of `Summary` model is a string nanoid
        - Get Context can return Peer Card & Peer Representation
        </Update>
        <Update label="v1.4.1">
        ### Added

        - Get Peer Card method
        - Update Message metadata method
        - Session level deriver status methods
        - Delete session message

        ### Fixed

        - Dialectic Stream returns Iterators
        - Type warnings

        ### Changed

        - Pagination class to match core implementation
        </Update>
        <Update label="v1.4.0">
        ### Added

        - getSummaries API returning structured summaries
        - Webhook support

        ### Changed

        - Messages can take an optional `created_at` value, defaulting to the current
          time (UTC ISO 8601)
        </Update>
        <Update label="v1.2.2">
            ### Added

            - Filter parameter to various endpoints

        </Update>
        <Update label="v1.2.1">
            ### Fixed

            - Honcho util import paths

        </Update>
        <Update label="v1.2.0">
            ### Added

            - Get/poll deriver queue status endpoints added to workspace
            - Added endpoint to upload files as messages

            ### Removed

            - Removed peer messages in accordance with Honcho 2.1.0

            ### Changed

            - Updated chat endpoint to use singular `query` in accordance with Honcho 2.1.0

        </Update>
        <Update label="v1.1.0">
            ### Fixed

            - Properly handle AsyncClient
        </Update>
    </Tab>

    <Tab title="TypeScript SDK">
        [TypeScript SDK](https://www.npmjs.com/package/@honcho-ai/sdk)
        <Update label="v2.2.0">
        ### Added

        - `ConclusionLevel` type (`explicit`, `deductive`, `inductive`, `contradiction`) and a `level` field on `Conclusion`, exposing the reasoning level the server already tracked but previously stripped from responses.
        - `filters` option on `conclusions.list()` and `conclusions.query()`, passed through to the same dynamic server-side filter logic as the other list endpoints. Filter explicit-only conclusions with `{ filters: { level: 'explicit' } }`, or by any other supported field/operator. Requires a Honcho server with the matching API support (Honcho v3.0.11+).

        ### Fixed

        - Scope-managed filter keys (`observer`, `observed`, `session`) are now rejected with a clear error if passed in `filters`, instead of silently overriding the scope and returning conclusions from a different peer pair. Use `peer.conclusions` / `peer.conclusionsOf(target)` and the dedicated `session` option instead. `session_id` remains a valid filter on `query()`.
        </Update>
        <Update label="v2.1.2">
        ### Added

        - `peers` option on `Honcho.session()` — attach peers to a session at creation time instead of needing a follow-up `session.addPeers()` call. Accepts the same `PeerAddition` shape as `session.addPeers()` (peer ID strings, `Peer` objects, arrays of either, or a record with per-peer `observe_me`/`observe_others` config).

        ### Changed

        - ID validation in `validation.ts` now accepts workspace, peer, and session IDs up to 512 characters (was 100), matching the server-side schema change in Honcho v3.0.7.

        ### Fixed

        - `Honcho.workspaces()` now actually forwards the `reverse` option to the server. The 2.1.0 changelog listed `workspaces()` among the list methods that gained `reverse`, but `client.ts` was missing the field on the params type and request builder, so the option was silently dropped. Honoring `reverse` on the workspace/peer/session list routes also requires a Honcho server with the matching API fix; older servers silently ignore the parameter.
        </Update>
        <Update label="v2.1.1">
        ### Fixed

        - Broadened fetch error retry logic to catch all `TypeError` network failures (connection resets, DNS errors, etc.) instead of only those with `'fetch'` in the message, improving resilience across runtimes (Node, Bun, browsers)
        </Update>
        <Update label="v2.1.0">
        ### Added

        - `createdAt` property on `Peer` and `Session` wrapper objects
        - `isActive` property on `Session` wrapper objects
        - `getMessage(messageId)` method on `Session` to fetch a single message by ID
        - `Peer.representation()`, `Session.representation()`, and `Session.context()` now accept `Message` objects for `searchQuery`
        - `page`, `size`, and `reverse` pagination controls on all list methods

        ### Changed

        - **Breaking**: `searchQuery` removed from top-level `context()` options — use `representationOptions.searchQuery` instead:
          ```typescript
          // Before (v2.0.x)
          await session.context({ searchQuery: "..." });
          // After (v2.1.0)
          await session.context({ representationOptions: { searchQuery: "..." } });
          ```
        - List methods (`peers()`, `sessions()`, `messages()`, `workspaces()`) support both the new options object and the legacy raw-filter form
        - Representation search options now accept strings and content-like objects, including `Message` instances, while rejecting whitespace-only or invalid runtime inputs
        - **Breaking**: `peer()` and `session()` now always make a get-or-create API call — no more lazy initialization. If you relied on constructing SDK objects without triggering a network request, note that every `peer()` and `session()` call now hits the API:
          ```typescript
          // Before (v2.0.x) — no API call
          const session = honcho.session("my-session");
          // After (v2.1.0) — makes a get-or-create API call
          const session = await honcho.session("my-session");
          ```
        - Response configuration models now tolerate unknown fields from newer servers for forward compatibility
        - Moved `@types/node` from `dependencies` to `devDependencies`

        ### Fixed

        - `uploadFile()` now rejects unsupported top-level binary/object inputs and only validates inputs the serializer can actually upload
        - `uploadFile()` now serializes message configuration using API field names, matching `addMessages()`
        - Session fetch methods now refresh cached `createdAt` and `isActive` values alongside metadata and configuration
        </Update>
        <Update label="v2.0.2">
        ### Changed

        - Client constructor now rejects unknown options via `.strict()` Zod validation. Previously, misspelled options (e.g., `baseUrl` instead of `baseURL`) were silently ignored, causing the SDK to fall back to defaults. Now a `ZodError` is thrown with the unrecognized key name.
        - All input schemas now use `.strict()` validation to reject unknown fields.
        - `FileUploadSchema.configuration` now uses `MessageConfigurationSchema` instead of open record type.

        ### Fixed

        - README example used `baseUrl` instead of `baseURL`.
        </Update>
        <Update label="v2.0.1">
        ### Added

        - `setPeerCard` method

        ### Changed

        - `card` is now `getCard` with `card` kept for backwards compatibility and marked as deprecated
        </Update>
        <Update label="v2.0.0">
        ### Added

        - `ConclusionScope` object for CRUD operations on conclusions (renamed from observations)
        - Representation configuration support

        ### Changed

        - Observations renamed to Conclusions across the SDK
        - Major SDK refactoring and cleanup
        - Simplified method signatures throughout
        - Representation endpoints now return `string` instead of old Representation object

        ### Fixed

        - Pagination `this` binding issue

        ### Removed

        - Representation object
        - Stainless "core" SDK -- this SDK is now standalone
        </Update>
        <Update label="v1.6.0">
            ### Added

            - metadata and configuration fields to Workspace, Peer, Session, and Message objects
            - Session Clone methods
            - Peer level get_context method
            - `ObservationScope` object to perform CRUD operations on observations
            - Representation object for WorkingRepresentations

            ### Changed

            - methods that take IDs, can all optionally take an object of the same type
        </Update>
        <Update label="v1.5.0">
        ### Added

        - Delete workspace method

        ### Changed

        - message_id of `Summary` model is a string nanoid
        - Get Context can return Peer Card & Peer Representation
        </Update>
        <Update label="v1.4.1">
        ### Added

        - Get Peer Card method
        - Update Message metadata method
        - Session level deriver status methods
        - Delete session message

        ### Fixed

        - Dialectic Stream returns Iterators
        - Type warnings

        ### Changed

        - Pagination class to match core implementation
        </Update>
        <Update label="v1.4.0">
        ### Added

        - getSummaries API returning structured summaries
        - Webhook support

        ### Changed

        - Messages can take an optional `created_at` value, defaulting to the current
          time (UTC ISO 8601)
        </Update>
        <Update label="v1.2.1">
            ### Added

            - linting via Biome
            - Adding filter parameter to various endpoints

            ### Fixed

            - Order of parameters in `getSessions` endpoint
        </Update>
        <Update label="v1.2.0">
            ### Added

            - Get/poll deriver queue status endpoints added to workspace
            - Added endpoint to upload files as messages

            ### Removed

            - Removed peer messages in accordance with Honcho 2.1.0

            ### Changed

            - Updated chat endpoint to use singular `query` in accordance with Honcho 2.1.0
        </Update>
        <Update label="v1.1.0">
            ### Fixed

            - Create default workspace on Honcho client instantiation
            - Simplified Honcho client import path
        </Update>
    </Tab>
</Tabs>

## Getting Help

If you encounter issues using the Honcho API or its SDKs:

1. Open an issue on [GitHub](https://github.com/plastic-labs/honcho/issues)
2. Join our [Discord community](http://discord.gg/honcho) for support
