Long-term memory for pi, in the store your other coding agents already write to.

Every pi session starts from zero. pi ships no memory by design ("primitives, not features"), so this package adds it. Each session writes what it learned to a memory file, and weeks later pi finds it again by meaning, in whatever words you use then. The store is the same per-project one Claude Code, Codex, OpenClaw and OpenCode write through memsearch.

• Recall in the phrasing you use weeks later: 32/35 strong hits vs 26/35 for pi-memory's qmd backend, over 35 queries against an identical 223-file corpus (benchmark).
• Cross-agent: pi recalls what Claude Code learned yesterday in the same repo, and vice versa.
• Plain markdown under .memsearch/, yours to commit or gitignore.

The memory writes itself, then answers weeks later:

# .memsearch/memory/2026-08-13.md  ← written by the session, unprompted
### 22:41
- the user and the agent moved the hot cache to Redis with 5 minute TTLs

# a new session, three weeks on
you ▸ /recall how did we fix the flaky redis test?
pi  ▸ memory_search → 5 chunks; top: 2026-08-13 "moved the hot cache to Redis with 5 minute TTLs" (0.81)
      memory_expand → the full "### 22:41" section, with its session anchor
      → answered at layer 2; the origin transcript was never opened

Install

Current release: 1.4.5.

Needs uv, the only external dependency, plus pi >= 0.84.1 and Node >= 22.19.

pi install npm:pi-memsearch

The first run downloads the onnx embedding model once, about 560 MB. pi announces it as a notice, so the pause is not mistaken for a hang. No API key is involved.

A [milvus].collection pinned in ~/.memsearch/config.toml or a project .memsearch.toml chooses the collection pi reads and writes, as it does for the other agents. If you already have such a pin, pi moves to that collection and nothing is migrated: the next index refills it from the markdown store, and chunks in pi's old collection stay behind.

Project-local, pinned and unreleased installs, and what survives an uninstall: the install guide.

Documentation

Everything is at pi-memsearch.espadat.com:

• Install: prerequisites, the four install forms, first run, uninstall
• Configuration: every PI_MEMSEARCH_* variable, with its default and effect
• Tools: the seven tools, and the three-rung recall ladder
• Memory store: the daily markdown files, and which store a session writes to
• Runtime: hook-by-hook behavior, every tunable, every degradation path
• Troubleshooting: start with memory_status
• Limits: what is deliberately unsupported, and how it compares to pi-memory
• Development: the mise tasks, and the no-build-step jiti loading

In the repo: CONTEXT.md for the vocabulary, and meta/adr/ for the decisions and their rejected alternatives. Mesh parity (ADR 0001) constrains the rest.

Development

mise run setup, then mise run check / test / dev. Task reference, test layout and the release process: the development page and CONTRIBUTING.md.