# membrane
> A selective learning and memory substrate for agentic systems — typed, revisable, decayable memory with competence learning and trust-aware retrieval.
- **URL**: https://www.freshcrate.ai/projects/membrane
- **Author**: GustyCube
- **Category**: Frameworks
- **Latest version**: `v0.2.0` (2026-03-22)
- **License**: MIT
- **Source**: https://github.com/GustyCube/membrane
- **Homepage**: https://membrane.gustycube.com/
- **Language**: Go
- **GitHub**: 80 stars, 8 forks
- **Registry**: github
- **Tags**: `agent`, `agent-framework`, `agent-memory`, `agent-skills`, `agentic`, `ai-agents`, `autonomous-agents`, `collaborate`, `go`
## Description
A selective learning and memory substrate for agentic systems — typed, revisable, decayable memory with competence learning and trust-aware retrieval.
## Recent releases
| Version | Date | Urgency | Changes |
| --- | --- | --- | --- |
| `v0.2.0` | 2026-03-22 | Medium | v0.2.0
What's New
Vector-ranked retrieval — All five memory types now use embedding-based semantic retrieval, replacing the previous keyword/filter approach. Recall and ranking quality improve significantly across the board.
Postgres backend — Membrane now supports Postgres as a storage backend with native embedding-based selection. Configure via env var; integration tests cover both backends.