From the Space notebook

Work worth carrying forward.

Practical ideas for working with agents, explanations of memory, and notes from building Space.

Mem0 alternatives: Zep, Letta, MCP memory and Space

Mem0 is a memory layer that developers call from code. Its alternatives split by job: temporal graphs, agents that edit their own memory, local MCP servers, files your tools already read, and shared workspaces for the AI tools a team already uses. Pick the job first, then test two options.

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Codex skills: how to write, install and share them

A Codex skill is a folder with a SKILL.md file that teaches Codex one workflow. Writing one takes minutes; the parts that decide whether it helps are the description, the folder Codex reads it from, and how the rest of your team gets the current copy.

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From our benchmark

Median evidence-assessment time

81 reused synthetic cases · separate runs

Jev + Luna fallback
708 ms
Luna · low reasoning
5,690 ms
Lower is faster. Retrieval and storage are excluded. The fallback-enabled path cost more in these runs.

Jev vs GPT-5.6 Luna: speed, cost, and memory classification

We tested Jev against GPT-5.6 Luna, then used it to organize memory in Space. Here are the measured speed gains, cost trade-offs, errors, and limits.

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