bettermemory 3.25.0

Memory you can verify — a trust layer between an AI coding agent and its own past: per-hit staleness verdicts, claim-level use attribution, measured effectiveness, episodic run-state. MCP-native, local-first, MIT, no cloud.

Claude forgets you. Every session starts from zero: the stack you explained yesterday, the deploy quirk you debugged last week, the "we use uv, not pip" you have now said eleven times.

bettermemory gives Claude Code — or any MCP client — memory that survives the session and distrusts itself on your behalf. Every stored fact is a claim that has to keep earning belief: checked against the filesystem and git before the model relies on it, tracked when it shapes an answer, curated when the evidence says it rotted. You operate none of it. The agent does.

Install

Paste this into your agent:

Install bettermemory as my memory server: read https://github.com/0Mattias/bettermemory and follow the "For agents" section of the README.

That's the whole install. Prefer to do it yourself? Two commands:

uv tool install bettermemory
bettermemory init --client claude-code   # or claude-desktop / cursor / continue / cline

Restart the client and you're done. Want proof before wiring anything up? uvx bettermemory try runs a 60-second offline demo in a throwaway store: it writes a memory citing a file, deletes the file, and shows the next search flag the memory as stale.

What that feels like

Three weeks ago, mid-session:

> for the record: staging deploys go through Fly now, the Render
  setup is dead

⏺ Stored: "Staging deploys via fly deploy --config fly.staging.toml;
  the old Render service is decommissioned." (projects:acme)

Today, brand-new session, no context given:

> staging is 404ing after every deploy. ideas?

⏺ You have a stored note that staging deploys through Fly and Render
  is gone — last verified 3 weeks and 41 commits ago, so checking it
  before relying on it… fly.staging.toml still exists, but its
  internal_port changed on Monday. That's the 404: the app listens
  on 8080, the config still says 3000.

> fix it

⏺ Fixed. Re-verified the memory too, so the next session inherits it
  fresh instead of re-checking.

(Illustrative transcript.) Two things happened that a raw session cannot do: it remembered across a three-week gap, and it distrusted itself exactly enough to catch that the world had moved since.

Why this one

• It knows when it might be wrong. Every hit carries a staleness verdict built from calendar age, the file paths it cites, and the commits landed since it was last confirmed.
• It stays out of your context. Nothing is auto-injected; retrieval is a deliberate tool call, announced when it shapes an answer.
• It refuses to hoard. Transient state, secret-shaped tokens, and near-duplicates bounce at write time; claims about you stage for your confirmation.
• It's your data, on your disk. One markdown file per memory — greppable, hand-editable, git-syncable. No database, no cloud, no account. MIT.
• It proves it's helping. A built-in eval reports how often memory actually shaped a reply. Numbers, not vibes — published.

For agents

You were likely handed this link with "set this up." Steps are idempotent and safe to re-run:

1. uv tool install bettermemory — or pipx install bettermemory, or pip install bettermemory into a venv. Python 3.11–3.14.
2. bettermemory init --client claude-code — likewise claude-desktop, cursor, continue, cline. For any other MCP host, plain bettermemory init prints the canonical mcpServers JSON snippet plus known config locations.
3. bettermemory doctor — exit 0 means correctly wired; every failed check prints a one-line fix.
4. Have the user restart the client so the server loads, then confirm by asking the model "what memory tools do you have?"

Your operating contract — tool signatures, retrieval discipline, write gates — is docs/api.md; the server's instructions block delivers the core policy automatically. For the long-form policy in your system prompt: bettermemory init --with-addendum. Migrating from Claude Code's built-in auto-memory: bettermemory ingest imports those files once.

Everything else

You shouldn't need it, but it's all written down: mechanics, storage format, the full tool surface, CLI, configuration, and limitations in docs/internals.md; per-client setup in docs/clients.md and docs/installation.md; eval methodology in docs/eval.md; postmortems in docs/incidents/; release history in CHANGELOG.md; dev setup and the compatibility contract in CONTRIBUTING.md.

MIT licensed — see LICENSE.