the todo board leaves the platform

`/todos` is now the `kanban` plugin. removed here: the router, the screen, the
route, the TodoBoard panel, its AppRegistry entry and the `todos` permission.

WHAT STAYED, and it is a seam rather than an oversight: `todo/` and
`scripts/todo-index.ts`. that folder is the platform's OWN backlog, committed with
the platform's own code, and the CLI regenerates TODO.md from a terminal with no
Officer running. moving either would have made this repository's own documentation
depend on a plugin being installed.

so `todo-tree.ts` stays too, with one caller instead of two, and there are now two
copies of that logic which will drift. recorded in the file itself and in the
plugin's README rather than discovered in six months. the honest fix on the day it
matters is to delete the CLI and let the plugin own the format.

THE TOTALITY CHECK EARNED ITS KEEP. removing the router left `todos` in
permissions/registry.ts and the server REFUSED TO BOOT — exactly what that guard is
for. a stale permission naming a route that no longer exists is the kind of thing
that otherwise sits there for months granting access to nothing.

docs:check then caught two more: the generated platform skill still listed `/todos`,
and AGENTS.md claimed 21 permission entries against a registry now holding 20. both
fixed, and the AGENTS.md note now explains the drop the same way it already explains
caldav's.

verified: server boots, `bun todo:index` still regenerates TODO.md, 1665 tests pass
(up from 1657 — the ported tree tests run in the plugin now), typecheck clean,
docs:check green.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Officer-Session: 656f5c85-e49a-4f1f-b9f3-042a04b4d043

AGENTS.md

@@ -243,7 +243,7 @@ ahead of everything, and it re-verifies the token itself so it covers routes tha
 - `permissions/registry.ts` — the single enumeration of what the platform can do, in five kinds:
   `core` (every account, not deniable), `app` (**the grantable surface**), `confined` (grantable, but
   only to an account that has a Linux user), `execution` and `admin` (owner only, and `execution` is
-  never grantable at any level). **21 entries as of 2026-08-27** — verified by `bun run docs:check`, which fails if this number drifts again: 6 core, 2 app, 4 confined, 3 execution, 6 admin (`todos`, the todo board, is the sixth). It was 22 until caldav became a plugin and took `calendar` with it — a plugin's permission is registered at runtime from its manifest, so it is real but not in this file's count. `notify` moved from `app` to `core` on 2026-08-24: it was grantable, nothing granted it, and every Member's app was silently 403'd registering its own push token. It said 27 for nine days. The execution count dropped by one when Minesweeper became a plugin — see `plugins/minesweeper/manifest.ts` for why that was a fix rather than a downgrade.
+  never grantable at any level). **20 entries as of 2026-08-29** — verified by `bun run docs:check`, which fails if this number drifts again: 6 core, 2 app, 4 confined, 3 execution, 5 admin. It was 21 until the todo board became the `kanban` plugin and took `todos` with it — the same shape as caldav below, and for the same reason: a plugin's permission is registered at runtime from its manifest, so it is real but not in this file's count. It was 22 until caldav became a plugin and took `calendar` with it — a plugin's permission is registered at runtime from its manifest, so it is real but not in this file's count. `notify` moved from `app` to `core` on 2026-08-24: it was grantable, nothing granted it, and every Member's app was silently 403'd registering its own push token. It said 27 for nine days. The execution count dropped by one when Minesweeper became a plugin — see `plugins/minesweeper/manifest.ts` for why that was a fix rather than a downgrade.
 - `permissions/authorize.ts` — resolves "may this account do this". Owner short-circuits first; every
   other answer is role grants plus core, with `execution`/`admin` stripped even if a row grants them,
   and `confined` stripped for an account with no `osUser`.