Spencer Hill

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ai · systems1 min

A second brain that runs itself

Every tool for getting organized eventually becomes a place where data goes stale: the app you stopped opening, the dashboard nobody checks, the second brain with no pulse. The problem was never storage.

Mine is a version-controlled vault of plain markdown files, and every layer of it is agentic. A dozen scheduled AI routines clone the repo, do their work, and push back: a daily summary sorts the inbox and writes the morning note before I sit down, a project manager escalates stalled work, a gardener proposes new evergreen notes, a curator proposes edits to the system’s own kernel file, which I accept with one tap.

The principles it runs on:

  • The files are the system. The agents read and write the same markdown I do, so nothing gets locked inside a product I’ll abandon later. The vault outlives any tool that touches it.
  • It works ahead of you. The routines run whether I show up or not. By morning the inbox is sorted and the note is written. I didn’t ask, and that’s the point.
  • The repo is the brain; the agents are stateless. State, policy, and memory are all just files in git, which is what makes it portable.
  • It gets better by watching itself. Daily retrospectives feed weekly reviews feed kernel updates. An eval harness scores the agents’ output against a deterministic rubric, and it has caught the system breaking its own style rules every single morning.

There’s also a live dashboard with an AI-painted sky that changes with the time of day, semantic search over the whole vault, and a hardened git story: protected branches, a push guard, and nightly out-of-band snapshots, because replication is not backup.