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OptMem
OptMem is a permanent memory system for AI agents that uses a small prompt and a CLI script.
OptMem gives AI agents permanent memory through a compact prompt and a command-line script. Users install it by adding a generated memory block to their agent configuration files like AGENTS.md or CLAUDE.md. The tool stores fixed-width records locally, allowing fast lookups where a million memories take 0.03 seconds to wake. Developers manage the system using terminal commands to wake sessions, record notes, answer merges, recall memories, zoom into tree nodes, and forget bad summaries. It relies on explicit user commands rather than background processes, and memory directories can be synced or kept in git repositories.
OptMem at a glance
- Best for: Software engineer
- Runs on: CLI, self-hosted, open source
- Pricing: Free
- Released: July 2026
- Category: AI coding tool
- Website: github.com/victortaelin/optmem
Key features
- Permanent memory for AI agents
- Compact 426-token prompt integration
- Command-line interface for memory management
- Fixed-width records for rapid lookups
- Word for word memory search
- Manual merge management
- Customizable memory directory paths
Use it for
- Preserving context across AI agent sessions
- Recording notes and memories for AI agents
- Searching past agent interactions word for word
- Managing and merging agent memories manually
Alternatives to OptMem
- claude-mem — It shares persistent, searchable agent memory across sessions and devices.
- memU — It gives every connected agent a shared and inspectable memory layer.
- ProjectMem — Records project history locally to prevent AI from repeating failed work.
- AgentMemory — It runs locally with zero external databases and achieves high retrieval recall.
- MuscleMemory — It cuts input tokens, tool calls, and execution time while maintaining task success.
- memsearch — It shares continuous context across Claude Code, Codex, and other AI coding agents.
- Supermemory — Integrates long-term memory into AI coding agents with a single prompt.
- AI Memory — Shared memory for coding agents that works across machines and team members.
- MemPalace — Achieves high recall with local-first storage and zero API calls.
- Memdebug — Tracks AI agent memory in a tamper-evident ledger and rolls it back safely.
- ReMe — It enables local-first, file-native long-term memory sharing across multiple AI agents.
- Mem0 — It provides drop-in persistent memory for AI agents without changing pipelines.
All OptMem alternatives