Memory for vibe coding.

Vibe coding, the term Andrej Karpathy coined in February 2025, means letting the agent write the code while you steer in plain language. It is fast until the agent loses the thread:

• Every session starts empty.Anthropic puts it plainly: “each new session begins with no memory of what came before” (Anthropic engineering).
• Long sessions drop early decisions.As the context fills, Claude Code's own docs warn that Claude may start forgetting earlier instructions (best practices).
• Switching tools resets it.What you settled in Claude Code is not in Cursor or Codex, and built-in memory such as Claude Code's auto memory stays on one machine, in one tool.
• The why is the first thing lost. The code survives in git. Why you chose that approach, what you tried first and what broke does not, so the agent proposes the rejected idea again.

• It saves without you asking. If you have to remember to write things down, you will not, mid-flow.
• It follows you across tools. The same memory in Claude Code, Cursor, Codex and whatever you try next.
• It keeps the why, not just the what. The decision, the option you turned down, the root cause and the fix.
• It is tied to the code. Linked to the files and commits it is about, so it comes back when the agent touches them.
• It knows what is current. When you change your mind, the agent follows the new decision, not the old one.
• It reaches your teammates when you have any, without anyone copying notes between machines.

Six ways to give a vibe-coding agent a memory, from a file in the repository to a shared engineering memory, as of October 2026. Most people combine an instruction file with one of the others.

More side by side: memory for coding agents, compared.

1. You work as usual. As the agent settles an approach, finds a root cause or fixes a bug, it saves that to Recallium with the files involved.
2. Before the next edit, Recallium finds what you already settled about that code and feeds it to the agent, in whichever tool you have open.
3. Next morning, or in another agent, the session recap and your workstream pick up where you stopped.
4. When you change your mind, the new decision replaces the old one; the old one stays on record with the reason.

One command connects the agents on your machine:

npx -y recallium install

Join the waitlist for Recallium Cloud. Cloud Free has 500 memories a month until December 2026.

• Keep a short AGENTS.md or CLAUDE.md with build commands and the rules that must hold. Prune it: Anthropic's test is “Would removing this cause Claude to make mistakes?”
• Plan in a file, then build in a fresh session. Have the agent write a short spec, then start clean and implement it.
• Commit often, with real messages. Git history is the one record every agent can read.
• Resume instead of restarting when you continue the same work: claude --continue, codex resume --last.
• Clear between unrelated tasks. A fresh context forgets less of what matters than a full one.

More on why agents re-read the same files every session, and how to stop it: six fixes.

What is vibe coding?

Building software by describing what you want to an AI coding agent and letting it write the code, steering in plain language rather than editing line by line. Andrej Karpathy coined the term in February 2025.

Why does my AI forget what we decided?

Because each session starts with an empty context, long sessions push early decisions out, and each tool keeps its own memory. Unless a decision is written somewhere the next session reads, it is gone.

What is the best memory tool for vibe coding?

It depends on how you work. Alone, in one tool: the agent's built-in memory and an AGENTS.md. Long task lists: Beads. One person across chat apps and agents: a personal memory service such as Memside or OpenMemory. Across several agents or with teammates, keeping why the code is the way it is: Recallium.

Is this the same as developer memory?

On its own, “developer memory” usually means how programs use RAM. Developer memory for AI agents, the record coding agents read and write about your codebase, is what Recallium calls engineering memory. It is different from serving memory, which an app keeps about its users.

Do I still need CLAUDE.md or AGENTS.md?

Yes. Instruction files hold the rules every session must follow. Memory holds what you worked out along the way. They do different jobs.