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How to recover why a past decision was made and what it said then with Agent Memory

Pull the reasoning behind an old choice and check what the memory said on a given date.

Who it is forAn engineer picking up a project after weeks away who needs the reason behind a design choice and whether it changed.

The problemOld decisions are hard to reconstruct, and a later edit can hide what was true at the time.

The outcomeThe engineer gets the current memory, the outline of its file, and the version that was valid on the chosen date.

What you need first

  • Python environment able to install the agent-memory package, as described in the README
  • Claude Code or Codex CLI installed on the machine
  • A store directory set as AGENT_MEMORY_STORE
  • Shell access to run the mem commands

Steps

  1. Run mem recall "why files instead of a database" to find the matching memory path.
  2. Run mem read --level outline to see its headings before opening the full text. (inferred, check the README)
  3. Run mem recall "why files instead of a database" --as-of <date> to check what was valid on that date. (inferred, check the README)
  4. Run mem trace to see the cited raw messages behind the memory when the summary is not enough.

Prompt for your agent

Use the agent-memory repo at <store path> to find the memory about <decision topic>, then show its outline and the version valid on <date>. Expected output: the memory path, its outline, and the as-of answer. Verify that the as-of answer differs from the current file when the memory was superseded.

Caveat. The as-of date syntax is not shown in the README excerpt, so the date argument in the step above is inferred and should be checked against the CLI help.

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