Daybook Suite

Your memory as plain text, not a black box.

While everyone stacks more layers on top — vector stores, memory frameworks, another “second brain” app — Daybook Suite steps back down to the substrate: plain text, append-only, zero dependencies. Memory should not be a black box. It should be a stack of ledger pages you can actually read.

What it is

Daybook Suite is three small, independent tools that share one foundation and one source of truth:

daybook — the ledger (起居注)

A local, plain-text journal and index. Append-only. No database, no server, no lock-in. MIT.

daybook-mcp — the query face (璇玑)

Exposes your daybook to any MCP-capable client. Read-oriented, mountable, model-agnostic. MIT.

daybook-orch — the conductor (司南)

Orchestration and scheduling across agents and tasks. AGPL-3.0-or-later or a commercial license.

Why plain text

You own it. A folder of text files you can read with cat, archive, diff, and back up anywhere.
Runs anywhere. Zero dependencies. Copy it to any machine and it just works.
Append-only. Nothing is silently rewritten. History stays history.
Auditable. No hidden state, no telemetry, no cloud round-trip.

Scale

5,467 lines of dependency-free Python across the three packages (daybook 1,354 · daybook-mcp 2,367 · daybook-orch 1,746) — plus thin ports in shell, C, BASIC, and Fortran. Current version v3.0.

Price

$10.99 one-time · personal & non-commercial use

The full suite — daybook · daybook-mcp · daybook-orch — plus updates.

Buy — $10.99

Honest pricing. The full source is open (MIT / AGPL) and free on GitHub — clone it, read it, audit it, build it yourself. Buying here is for people who want a one-click download, future updates, and to keep the work going. No subscription, no lock-in.

Commercial use of daybook-orch requires a separate commercial license — contact hi@daybooksuite.com. Payments and applicable taxes are handled by our Merchant of Record, Paddle.

License

Daybook and daybook-mcp are released under the MIT License. daybook-orch is released under AGPL-3.0-or-later, with a commercial license available. Full details are in each package's LICENSING.md.

Daybook Suite is operated by 手艺人老宋, an independent developer.
Contact: hi@daybooksuite.com · songliansheng@vip.sina.com