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Why · Install · Quick start · Examples · Benchmarks · Agents · How it works · Uninstall

notionmemory turns your own Notion workspace into a shared, long-term brain for coding agents (Claude Code, Codex, Kimi Code, pi, opencode). It ships a set of installable skills — long-term memory, your own page-types (you show the agent how you build a page, and it authors new ones that way), and content search — plus session hooks that surface the right context automatically. Everything lives in your Notion; there's no separate database or server.

You don't run its commands by hand. You talk to your agent in plain language — "remember that", "where did I file this?", "make more pages like the ones I build" — and the agent runs notionmemory for you under the hood.

Why notionmemory

I built this for myself. Tools like agentmemory and claude-mem keep memories in a local vector database — fast and private, but two things kept getting in my way:

• I couldn't see what was stored. A vector DB is a black box — I couldn't open it, read what the agent "remembered," or fix a wrong entry. In Notion it's just pages, so I read and edit the memory myself.
• It didn't follow me. I develop across a server and a laptop, and memory that lives on one machine doesn't sync to the other. Notion is already cloud — the same brain everywhere.

I also wanted my agent beyond code: my study notes already live in Notion. Keeping memory there too gives my agent (and me) one place to reach from anywhere, instead of a hidden sidecar database. So notionmemory uses Notion as the cloud — visible, editable, shared, and already where the rest of my life is.

Install

1. Install the backend (user scope)

Install into your user scope — never sudo / system-wide. notionmemory places skills, session hooks, and local state under your home (~/.claude, ~/.codex, ~/.config/notionmemory, ~/.local/state/notionmemory), so it must run as your own user.

pipx install notionmemory        # recommended — isolated, on your PATH, user-scoped
# or: uv tool install notionmemory
# or: pip install --user notionmemory

2. Add it to your agent

Installing for both agents is supported — that's the point: Claude Code and Codex share the same brain. Just use one install method per agent (plugin or notionmemory install); doing both on the same agent installs its skills twice.

Claude Code (plugin)

/plugin marketplace add legojeon/notionmemory
/plugin install notionmemory@notionmemory

⚠️ The plugin installs the skills and the session hooks. Do not also run notionmemory install --claude — that double-installs them.

Codex (plugin + hooks)

codex plugin marketplace add legojeon/notionmemory
codex plugin add notionmemory@notionmemory
notionmemory install --codex --skip-skills --trust-codex-hooks

⚠️ --trust-codex-hooks is required — without it Codex silently never fires the hooks.

No plugin (one command, both agents)

pipx install notionmemory && notionmemory install

Codex users still need notionmemory install --codex --trust-codex-hooks before Codex hooks fire.

Kimi Code / pi / opencode (one command each)

pipx install notionmemory
notionmemory install --kimi        # or: --pi   /   --opencode

No marketplace step for these three — one command installs the skills plus each agent's integration (pi & opencode get a small plugin bundle; Kimi Code gets config.toml hooks). notionmemory teardown removes all of it.

3. Run onboarding

Once installed, just ask your agent to onboard you — it runs the notionmemory:onboard skill (and offers it automatically on your first session). It walks you through connecting Notion — including sharing your pages with the integration — and setting up memory and search as guided choices, skipping anything already done. The only thing it hands to you is pasting the Notion token, because a secret must never go through chat — so mind these when you create it at app.notion.com/developers/tokens:

• Workspace (most important): choose the workspace that holds your pages — the token is locked to that one workspace.
• Capability: keep Notion API checked (read/write content); "Workers" isn't needed.
• Expiration: pick the longest window offered — when it lapses the token stops working and you'll have to create a new one and reconnect.

Quick start

The core of it runs by itself: as you code and work, your agent automatically keeps context through your Notion memory. Every session starts pre-loaded with the project brief and your most important memories, a per-message hint surfaces a relevant memory the moment one matches, and decisions worth keeping are captured along the way — so a new session (or a different agent) picks up right where the last one left off.

On top of that, you just talk — the agent runs the right skill, and you never type notionmemory commands. For example:

Remember & recall

"Remember we moved auth to JWT refresh-token rotation." "Did we decide how to handle rate limiting?"

Search your Notion

"Where's my deployment runbook?"

Author in your Notion

"Remember how I build my weekly reports — keep the tone brief." (paste a page you made) "Draft this week's in that shape, and drop in figure 3 from this PDF."

You never see the CLI — and the memory keeps working between these moments, not just when you ask.

Examples

The templates skill turns any Notion database or page you own into something the agent CRUDs and authors into by name — and an optional attached prompt tells it how. A few things built this way: a reading list that files papers by property, an idea bank that researches each idea before saving it, a portfolio that reads your actual repo, and a lecture-note blueprint that turns raw slides into structured notes. Each with its base template and the real prompt behind it:

→ See the examples

Benchmarks

Retrieval quality measured with agentmemory's open eval harness (hand-labeled P@K/R@K, no LLM judge) against a live, sandboxed Notion database — real remember ingests, real recall queries. Reproduce with bench/.

Corpus	Adapter	R@5	R@10	P@5	MRR
coding-agent-life-v1 — 15 dev sessions, 15 queries	grep (full-text baseline)	0.967	0.967	0.227	0.824
	notionmemory	1.000	1.000	0.240	0.889
LongMemEval-S (ICLR 2025), stratified sample — 6 questions, raw ~9KB chat sessions	grep (full-text baseline)	1.000	1.000	0.333	0.917
	notionmemory	1.000	1.000	0.333	0.833

P@5 looks low by construction: most questions have 1–2 gold documents, so the ceiling is 0.2–0.4 — read it against that ceiling, not against 1.0.

No embeddings and no vector database behind those numbers: a lexical BM25 ranking over a tiny local index (titles, concepts, content), live-verified against Notion, with the agent doing the semantic judging on top. Honest caveats: both corpora are small (15 + 6 hand-graded questions — the LongMemEval sample is 1 question per type, not the full 500), latency per recall is a live Notion round-trip (~1s), and the raw-transcript corpus is an off-label stress test — notionmemory's designed diet is distilled memories, which score at least as well. (The live table samples LongMemEval; the full 500 questions are covered offline below.)

On the full 500-question LongMemEval-S (offline, over the shipped index code — the component that determines recall's ordering; same recall_any@K per-question-index protocol as agentmemory's run, reproduce with bench/lme_full500.py), compared with results other systems report:

	notionmemory (BM25, no embeddings)	agentmemory (BM25 + vector)	agentmemory (BM25 only)	MemPalace (vector-only)	oracleagentmemory	Letta / MemGPT	Mem0
Benchmark	LongMemEval-S	LongMemEval-S	LongMemEval-S	LongMemEval-S	LongMemEval	LoCoMo (different)	LoCoMo (different)
Sample	full 500	full 500	full 500	full run	full run	—	—
R@5	0.946	0.952	0.862	~0.966	0.944	0.832	0.685
R@10	0.976	0.986	0.946	~0.976	—	—	—
MRR	0.893	0.882	0.715	—	—	—	—
Measured by	us, offline index run	agentmemory	agentmemory	vendor (self-reported)	vendor (self-reported)	vendor (self-reported)	vendor (self-reported)

Zero embeddings lands 8pp above agentmemory's BM25-only and within 0.6pp of their BM25+vector hybrid (with a higher MRR) — the gap embeddings buy them is mostly closed by field-weighted BM25 plus the agent doing semantic judging at read time. Honest caveats: our row is an offline run of the shipped ranking code, not the live end-to-end path (that's the 6-question table above); non-agentmemory rows are vendor claims on their own harnesses, and the LoCoMo rows aren't even the same benchmark. Ballpark, not a leaderboard.

Agents

notionmemory is agent-driven — the CLI is only the mechanism the agent calls. You interact in natural language; the agent picks the right skill and runs it. It works with any agent that runs shell hooks and a CLI — five are supported today:

Claude Code plugin · skills + hooks

Codex plugin + trusted hooks

Kimi Code config.toml hooks

pi bundle plugin

opencode bundle plugin

However it's installed, you use them the same — talk in natural language and the agent runs notionmemory for you. See Install for each agent's one-time setup.

Skills the agent can reach:

• onboard — first-time guided setup (Notion + memory + search)
• memory — save/recall long-term decisions & patterns in a Notion Second Brain
• templates — teach the agent how you build a page. Point it at a Notion page/DB you made and attach a prompt — the structure, the tone, which sections to research and fill, even just a memo to yourself — and it authors new entries in Notion that follow your workflow, not a canned template
• library — content search across your Notion pages
• settings — a local web dashboard for connections & configuration
• git — optional post-commit capture of your commits into memory

How it works

Your agent talks to your Notion through the notionmemory CLI, which calls the Notion REST API. There's no separate database and no long-running server. What makes it a memory rather than a dumb store is the lifecycle — capture cheaply, consolidate with importance scoring, then recall the important things at the right moment:

What gets stored, and how

• Memory is a Notion "Second Brain" database. When you explicitly say "remember this" it lands Active right away. When the agent decides on its own to save something, it lands as a Draft — recallable, but not yet promoted.
• Every memory carries a Strength (1–10) — an importance score used to rank recall and to decide what's worth surfacing at session start.
• A consolidation pass reviews the Drafts: summarize and refine them, assign a real Strength, drop noise (→ Forgotten), merge duplicates (→ Superseded), and keep a rolled-up per-project brief — so the database stays curated instead of a raw dump. It also mines new memories straight out of your session transcripts. This runs automatically in the background (a session-end/start hook), or you can run notionmemory memory consolidate yourself.
• To do the summarizing, the pass sends session excerpts to your configured agent CLI — so it spends that account's usage in the background, and Notion only ever receives the distilled memory. Set skills.memory.consolidate_mode: nudge in ~/.config/notionmemory/config.yaml to turn the automatic pass off (manual/cron only); the backend and model (integrations.agent.backend / .model) live in the same file — edit it directly or ask your agent.

When it reads

• At session start, the agent is fed this project's brief plus its top high-Strength memories — gated by importance, not a raw recency dump.
• Per message, a zero-network local index may add a one-line "relevant memory" hint; the agent deep-reads it with recall only if it's actually relevant, and ignores it otherwise.
• On demand, library search finds pointers by title/heading across your whole Notion, and the agent live-reads the winners — content is always read fresh, never cached.

Search without embeddings

There is still no vector database and no embedding model. Memory search runs on BM25 — the classic lexical ranking (rare terms weigh more, long entries don't dominate) — over a tiny local index of titles, concepts, and content. The index holds only precomputed word statistics plus a 200-character excerpt per memory — your memory bodies are never duplicated on disk — so it stays small and per-message lookups stay in milliseconds. On top of that:

• recall ranks locally, then live-verifies the winners against Notion in one batched query — you get index speed with live truth (vanished pages self-heal out of the index).
• remember writes through to the index, so a memory you just saved is instantly searchable — no waiting for a reindex.
• Content search across your Notion pages (library) keeps an even simpler word-boundary match over titles and headings — that index never stores your page bodies.

Either way, the ranking only has to produce candidates: the agent itself supplies the semantics. It reads the top hits live and judges what's actually relevant — the judgment a vector similarity score approximates, an LLM does directly. Nothing to embed, sync, or go stale.

How memory updates

• New information supersedes the old (--supersedes) — the original is kept as Superseded, not deleted. forget sets Status=Forgotten; nothing is ever hard-deleted.
• Consolidation re-scores and merges over time, so importance and the project brief stay current.
• Pages you delete in Notion self-heal out of the local search index the moment they're read (a live 404 prunes the stale pointer), with an occasional full prune to sweep the rest.

Why a CLI + API, not an MCP server

Two reasons: where it runs, and what it can do.

• The session hooks (SessionStart / Stop / UserPromptSubmit) run as plain shell commands — they need a CLI, not a live MCP connection held open inside an agent session.
• The same CLI runs headless and in cron (e.g. consolidation), not only inside an MCP-capable chat.
• One skill set + CLI behaves identically across every supported agent; MCP support and semantics vary by agent.
• Fewer moving parts: no server process to run, your token stays in the OS keyring, and the only local state is a thin search index.
• It writes real content, not just text. Going straight to the REST API lets notionmemory turn markdown into Notion blocks, create and edit pages and databases, and upload images into a page via Notion's Direct Upload — so the agent can drop a figure it cropped from a PDF right into your notes. The reading and cropping are the agent's own tools; notionmemory owns the Notion write, which a read-oriented MCP flow doesn't cover.

When MCP is the better fit: to reach a client with no shell — Claude Desktop, Gemini, a web or mobile chat — or from any device with nothing installed, that's MCP's turf, and one server works across every MCP client with no per-agent code. notionmemory trades that reach for what a CLI does best: automatic capture at session boundaries, headless consolidation, and writing real content into your pages. Different tools for different jobs.

The settings dashboard stores your Notion connection and skill options — just ask your agent to "open notionmemory settings" (the settings skill), or run notionmemory serve yourself. The token lives in your OS keyring, never in a file.

Uninstall

Full removal is a few steps because different tools own different pieces. Run notionmemory teardown first (while the CLI still exists) and remove the backend last (a running pipx uninstall of itself is unreliable). teardown removes only what notionmemory installed — skills, session/git hooks, local state — and never touches your Notion pages; it keeps your config and keyring token unless you add --purge-config --purge-secrets.

Claude Code (plugin):

notionmemory teardown --purge-config --purge-secrets   # config, keyring token, local state
claude plugin uninstall notionmemory@notionmemory      # skills + hooks
claude plugin marketplace remove notionmemory          # marketplace source
pipx uninstall notionmemory                            # backend — run last

Codex (plugin):

notionmemory teardown --purge-config --purge-secrets
codex plugin remove notionmemory@notionmemory          # or uninstall it from `codex /plugins`
codex plugin marketplace remove notionmemory
pipx uninstall notionmemory

No-plugin install (you set it up with notionmemory install) — teardown already removes the skills and hooks:

notionmemory teardown --purge-config --purge-secrets
pipx uninstall notionmemory

Drop --purge-config --purge-secrets to keep your config and saved token for a later reinstall. If you installed the backend with uv/pip instead of pipx, uninstall it with uv tool uninstall notionmemory / pip uninstall notionmemory. Notion databases and pages are never deleted.

License

MIT — see LICENSE.