@tinysquid/pi-memory

Persistent project memory for the pi coding agent: the project's MEMORY.md is injected into the system prompt, and /remember summarizes the current session back into it.

Install

pi install npm:@tinysquid/pi-memory

For local development:

ln -s $(pwd)/memory/memory.ts ~/.pi/agent/extensions/memory.ts

What it does

• Session start: walks up from the working directory to the project root — the first ancestor containing a marker (.git, AGENTS.md, package.json, Cargo.toml, go.mod, pyproject.toml, pom.xml, build.gradle, Gemfile, CMakeLists.txt) — reads MEMORY.md from it, and injects the full content into the system prompt.
• /remember command: extracts decisions, preferences, and lessons from the current session (user/assistant messages plus any compaction summary) with the active model, merges them into MEMORY.md, and updates the in-session memory immediately.

Behavior notes

• MEMORY.md uses three sections — Decisions, Preferences, Lessons — one terse line per entry; extraction writes caveman-style by design.
• Merging deduplicates: an entry that duplicates an existing one (substring either way, or >70% shared words) is dropped; an entry prefixed [update] replaces the entry it matches.
• Merged output over 500 lines triggers model-driven compression. If compression fails, the uncompressed file is written anyway; if it is still over the limit, a warning is shown.
• /remember needs a project root, a selected model, and a non-empty conversation — otherwise it notifies and does nothing.
• Extraction and compression both use the active session model.