todo: one file per item, grouped by theme, with a generated index

TODO.md had reached 1050 lines and 72 open items across 28 sections, read mostly
on a phone. It is now a directory: todo/<theme>/<item>.md, one card per file, with
frontmatter carrying id, status, created date and order, and the prose body copied
across verbatim. TODO.md becomes a generated index (bun run todo:index).

Dates: where an item's prose stated one it is used; otherwise its old section's;
otherwise 2026-08-20, floored at the day before the split rather than invented.
date_source records which.

Shaped for a two-way Kanban board, filed as todo/tooling — a card is a file, id is
the identity, frontmatter is the machine's half and the body is the owner's.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

todo/plugin-ecosystem/third-party-plugin-sidecars-are-unconfined.md

@@ -0,0 +1,17 @@
+---
+id: plugin-ecosystem/third-party-plugin-sidecars-are-unconfined
+title: "Third-party plugin sidecars are unconfined"
+theme: plugin-ecosystem
+status: open
+created: 2026-08-18
+date_source: section
+order: 2
+---
+
+**Third-party plugin sidecars are unconfined.** A plugin sidecar runs `bun run <script>` with
+`cwd: PLATFORM_DIR`, so Bun auto-loads `.env` and it gets `POSTGRES_URL`; it runs as the service
+user, which owns `secrets/officer-keys.db` and can therefore mint an owner JWT. Fine for
+first-party plugins, total compromise for anyone else's.
+
+The mechanism to fix it already exists and is pointed elsewhere: `spawn-as-member.ts` drops
+privileges with `setpriv --reset-env` and a six-name allowlist for exactly this reason.