PMB
local-first memory for AI coding agents over MCP
Details
- External ID
- 48631169
- Source
- HN
- Company
- —
- Product
- PMB
- Website domain
- github.com
- Launched
- June 22, 2026
- Cohort
- —
- Upvotes
- 7
- Upvotes percentile
- 0.42008196721311475
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
How it works: - Storage uses one SQLite database file, plus a local LanceDB index of vectors. No need for a server, cloud services, or any API keys. - Retrieval is a hybrid approach using BM25 (rank-bm25) and vector-based search (sentence-transformers) combined with a co-occurrence graph of entities, using reciprocal rank fusion. The idea is to find the right memory, not the closest one. - It plugs into the agent's lifecycle via MCP: before the agent responds, relevant memories are added to its input; after each turn, decisions and new learnings are automatically recorded. No need to manually remember "remember this". - It maintains a dictionary for each project which builds itself based on your memories, which improves recall performance for the project-specific vocabulary. - It can run fully offline, pointing to a locally installed Ollama model and even the optional large language model features such as consolidation, de-duplication, and chatting about your memories stays on your machine. Embedding is done locally by default.
Enrichment
- Theme
- coding agent interfaces and environments
- Vertical
- Horizontal
- Function
- Agent / copilot
- Audience
- Developer
- AI stance
- AI-native
- Project type
- Commercial product
- Normalized one-liner
- local memory for ai coding agents
- Manually corrected
- False
Could you build this?
Yes PMB combines standard open-source libraries (SQLite, LanceDB, rank-bm25, and sentence-transformers) into a Model Context Protocol (MCP) server, which AI assistants can generate rapidly.
Discussion
6 comments analyzed.
Competitors mentioned: Mem0, Zep
Concerns raised: Unclear retrieval advantages over Mem0/Zep beyond MCP injection, Whether project specialization justifies feature gap vs more developed hosted offerings
Feature requests: Hosted/managed memory API option (not just self-hosted), Direct integration with Claude Code, Cursor, Codex without custom code
Competitors
Other products that read as similar to this one — 247 launches clear the similarity bar, closest 8 shown.
Attention rank: #135 of 248 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 230 days after the earliest competitor.
- A file-based agent memory framework that works like skill · hn · 2026-01-06 · 11 upvotes · similarity 0.66
- Remembrane · hn · 2026-08-07 · 13 upvotes · similarity 0.64
- ClawMem · hn · 2026-03-22 · 5 upvotes · similarity 0.57
- Slowave · hn · 2026-09-14 · 5 upvotes · similarity 0.56
- PMB · hn · 2026-06-29 · 26 upvotes · similarity 0.55
- Friday · hn · 2026-09-16 · 9 upvotes · similarity 0.54
- AI memory with biological decay (52% recall) · hn · 2026-04-26 · 98 upvotes · similarity 0.53
- MetaBrain · hn · 2026-06-02 · 8 upvotes · similarity 0.52
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a agent / copilot tool for Agriculture yet.