fleet-memory/hindsight-docs/blog/2026-04-07-version-0-5-0.md

---
title: "What's new in Hindsight 0.5.0"
description: New features and improvements in Hindsight 0.5.0
authors: [nicoloboschi]
date: 2026-04-07T12:00
hide_table_of_contents: true
---

Hindsight 0.5.0 introduces the Bank Template Hub for portable configuration, a Constellation graph view in the Control Plane, major retain and recall performance improvements, new LLM providers (llama.cpp, OpenRouter, Google), retain append mode, new framework integrations (AutoGen, OpenCode), and a breaking removal of legacy graph retrieval strategies and the Hermes integration.

<!-- truncate -->

- [**Bank Template Hub**](#bank-template-hub): Export and import full bank configurations as reusable manifests.
- [**Constellation View**](#constellation-view): Interactive entity graph visualization in the Control Plane.
- [**Performance: Retain and Recall**](#performance-retain-and-recall): 3-phase retain pipeline and capped entity graph expansion for faster queries.
- [**New LLM Providers**](#new-llm-providers): Built-in llama.cpp for local inference, OpenRouter, and Google embeddings/reranker.
- [**Retain Append Mode**](#retain-append-mode): Concatenate new content onto existing documents with `update_mode='append'`.
- [**AutoGen Integration**](#autogen-integration): Persistent memory for AutoGen agents.
- [**Breaking Changes**](#breaking-changes): BFS/MPFP strategies removed; Hermes integration dropped.

## Bank Template Hub

Banks can now be exported as portable template manifests that capture the full configuration — settings, mental models, and directives — in a single JSON document. Import a manifest into any bank to replicate the setup instantly.

The manifest format captures everything needed to reproduce a bank's behavior:

```json
{
  "version": "1",
  "bank": {
    "retain_mission": "Extract customer issues, resolutions, and sentiment.",
    "enable_observations": true,
    "observations_mission": "Track recurring customer pain points."
  },
  "mental_models": [
    {
      "id": "sentiment-overview",
      "name": "Customer Sentiment Overview",
      "source_query": "What is the overall sentiment trend?",
      "trigger": { "refresh_after_consolidation": true }
    }
  ],
  "directives": [
    {
      "name": "Acknowledge frustration",
      "content": "Always acknowledge frustration before offering solutions.",
      "priority": 10
    }
  ]
}
```

A dry-run mode (`dry_run=True`) validates manifests without applying changes, and a schema endpoint returns the full JSON Schema for tooling integration. Mental models are matched by `id` and directives by `name` — existing entries are updated, new ones are created.

This is particularly useful for teams standardizing agent configurations or sharing proven bank setups across projects.

See the [Bank Template Hub documentation](/developer/api/bank-templates) for the full manifest schema and API reference.

## Constellation View

The Control Plane now includes an interactive Constellation view that renders memory entity graphs as a zoomable, pannable canvas. Nodes represent entities and their positions are deterministically computed, so the layout is stable across visits.

Links are color-coded by type — semantic (blue), temporal (teal), entity (amber), causal (purple) — and node color intensity maps to connectivity: brighter nodes have more connections. The view supports dark mode automatically and is built on the `@chenglou/pretext` layout engine for smooth text rendering at any zoom level.

Click any node to navigate to its entity detail page, or zoom out for a birds-eye view of how memories connect across your bank.

## Performance: Retain and Recall

### 3-Phase Retain Pipeline

The retain pipeline has been restructured into three distinct phases to eliminate database lock contention under concurrent load:

1. **Pre-resolve** — Entity resolution and semantic ANN search run outside a transaction on read-only connections, preventing slow reads from blocking writes.
2. **Insert** — Facts, temporal links, semantic links, and causal links are written atomically in a single transaction, ensuring retrieval consistency.
3. **Post-link** — Entity co-occurrence links (used only for UI visualization) are built after the transaction commits, as a best-effort background step.

Previously, the entire pipeline ran inside one long transaction, meaning concurrent agents would queue behind each other during the O(bank_size) ANN lookup. The new structure moves all read-heavy work out of the critical write path, resulting in dramatically lower latency when many agents write simultaneously.

### Capped Entity Graph Expansion

On large banks, the entity co-occurrence self-join in graph expansion could produce massive intermediate row counts when seed results reference high-fanout entities (e.g. an entity mentioned 25K+ times). This caused recall latency to spike unpredictably.

The graph expansion query now uses a LATERAL per-entity cap (`graph_per_entity_limit`, default 200), reducing intermediate rows from potentially millions to at most `num_entities × 200`. Results are recency-biased via `ORDER BY unit_id DESC`, which rides the primary key index with no extra sort cost. A timeout fallback (`graph_expansion_timeout`, default 10s) drops entity expansion entirely and falls back to semantic + causal signals if the query still takes too long.

A new composite index on `(entity_id, unit_id)` in `unit_entities` enables index-only scans for the capped subquery, keeping the expansion fast even on very large banks.

## New LLM Providers

### Built-in llama.cpp

Hindsight now ships with a built-in llama.cpp LLM provider, enabling fully local inference without any external API calls. Set the provider to `llama-cpp` and point it at a GGUF model file:

```bash
HINDSIGHT_API_LLM_PROVIDER=llama-cpp
HINDSIGHT_API_LLM_MODEL=/path/to/model.gguf
```

This is ideal for air-gapped environments, development setups, or anywhere you want to avoid external API costs. The provider uses the `llama-cpp-python` bindings and supports all standard Hindsight LLM operations (fact extraction, consolidation, reflect).

### OpenRouter

Hindsight now supports [OpenRouter](https://openrouter.ai/) as a provider for LLM, embeddings, and reranking. This gives you access to hundreds of models through a single API key:

```bash
HINDSIGHT_API_LLM_PROVIDER=openrouter
HINDSIGHT_API_LLM_API_KEY=sk-or-...
HINDSIGHT_API_LLM_MODEL=anthropic/claude-sonnet-4-20250514
```

OpenRouter is particularly useful for comparing models or accessing providers that don't have a direct Hindsight integration yet.

### Google Embeddings and Reranker

Google is now supported as a provider for embeddings and reranking, complementing the existing Gemini LLM provider support.

## Retain Append Mode

A new `update_mode='append'` option for retain lets you concatenate new content onto an existing document instead of replacing it. This is useful for streaming or incremental ingestion scenarios — for example, appending new log entries or conversation turns to an existing document:

```python
from hindsight_client import Hindsight

client = Hindsight(base_url="http://localhost:8888")

# First retain creates the document
client.retain(bank_id="my-bank", content="Day 1 notes...", document_id="journal")

# Subsequent retains append instead of replacing
client.retain(bank_id="my-bank", content="Day 2 notes...", document_id="journal", update_mode="append")
```

The default `update_mode` remains `replace` for backward compatibility.

## AutoGen Integration

`hindsight-autogen` provides persistent long-term memory for [AutoGen](https://github.com/microsoft/autogen) agents via three `FunctionTool` wrappers: `hindsight_retain`, `hindsight_recall`, and `hindsight_reflect`.

```bash
pip install hindsight-autogen
```

```python
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient
from hindsight_client import Hindsight
from hindsight_autogen import create_hindsight_tools

client = Hindsight(base_url="http://localhost:8888")
await client.acreate_bank(bank_id="user-123")

model_client = OpenAIChatCompletionClient(model="gpt-4o")
tools = create_hindsight_tools(client=client, bank_id="user-123")

agent = AssistantAgent(
    name="assistant",
    model_client=model_client,
    tools=tools,
)

await agent.run(task="Remember that I prefer dark mode")
await agent.run(task="What are my UI preferences?")
```

The integration supports memory scoping via tags, fact type filtering, custom metadata, and selective tool inclusion. Use `configure()` to set global defaults like budget, max tokens, and tag filters.

See the [AutoGen integration documentation](/sdks/integrations/autogen) for the full API reference.

## Breaking Changes

### Graph Retrieval Simplification

The BFS (breadth-first spreading activation) and MPFP (multi-path fact propagation) graph retrieval strategies have been removed. `LinkExpansionRetriever` is now the sole graph retrieval algorithm.

LinkExpansionRetriever operates on three precomputed, first-class signals — entity links, semantic kNN links, and causal links — without iterative graph walks or fan-out caps. It is simpler to maintain, faster at query time, and empirically more accurate in our benchmarks.

**Migration:** If you were explicitly selecting BFS or MPFP via configuration, remove that setting. The default has been LinkExpansionRetriever since 0.4.x, so most deployments require no changes.

### Hermes Integration Dropped

The `hindsight-hermes` integration package has been removed. Hermes Agent now ships with a native Hindsight memory provider built into the framework itself, making the external integration package unnecessary. See the [Hermes integration documentation](/sdks/integrations/hermes) for setup instructions with the native provider.

## Other Updates

**Features**
- Added OpenCode persistent memory plugin for the OpenCode editor.
- Helm chart now supports persistent volumes for local model cache.
- MCP server adds a `sync_retain` tool and validates UUID inputs.
- OpenClaw now supports `bankId` for static bank configurations.
- Recall combined scoring includes `proof_count` boost for better ranking.
- Fact serialization in think-prompt now includes `occurred_end` and `mentioned_at` for richer temporal context.

**Improvements**
- Consolidation observation quality improved with structured processing rules for better synthesis.
- OpenClaw gains a JSONL-backed retain queue that buffers retain calls locally when the external API is unreachable, preventing data loss during outages.
- LiteLLM SDK embeddings `encoding_format` is now configurable instead of hardcoded.

**Bug Fixes**
- Fixed out-of-range `content_index` crash in recall result mapping.
- Experience fact types are now preserved correctly during normalization instead of being silently reclassified.
- `clear memories` endpoint no longer deletes the bank profile along with the memories.
- Embedding daemon clears stale processes on the port before starting, preventing startup failures.
- Per-bank vector index migration now respects the configured vector extension.
- Timeline group sort uses numeric date comparison instead of locale string comparison.
- MCP server auto-coerces string-encoded JSON in tool arguments.
- Entity labels structure validated on PATCH to prevent invalid configurations.
- Fixed `bank_id` metric label to be opt-in, preventing OTel memory leak.
- Fixed `max_tokens` handling for OpenAI-compatible endpoints with custom base URLs.
- Query analyzer handles dateparser internal crashes gracefully.
- Windows compatibility fix for hindsight-embed.
- Addressed critical and high severity security vulnerabilities in dependencies.

## Feedback and Community

**Note:** Hindsight 0.5.0 contains breaking changes (BFS/MPFP removal, Hermes integration dropped). If you were using the default graph retrieval strategy, no action is needed. If you were using `hindsight-hermes`, switch to the native Hermes memory provider.

Share your feedback:

- [GitHub Discussions](https://github.com/vectorize-io/hindsight/discussions)
- [GitHub Issues](https://github.com/vectorize-io/hindsight/issues)

For detailed changes, see the [full changelog](/changelog).