docs(chord): p2 moves to Chord v2, then v1 is deleted

packages/chord/docs/decisions.md

@@ -2407,6 +2407,18 @@ validation and copies the v2 kernel added around Delta.
   into p2 (its vitest tests and about 140 imports would need porting); it is deleted in the change that moves p2 to
   v2. No version bump: Chord is work in progress. Done by a re-runnable script (move, import and link rewrites,
   generated exports and aliases) on the base that includes slice 11; p2's imports updated in private.
+- **p2 moves to Chord v2, then Chord v1 is deleted (owner, 2026-11-03: yes to the plan's eleven points; plan
+  `/tmp/p2-port/plan.md`):** (1) way (a): p2's kernel, workers and plugin loading move to v2 (`createHost`,
+  `createWorkers`, `createPlugins`), p2 keeps its own data directory, auth, devices and sharing, so no data migrates
+  (Chord v1 stored nothing for p2; every file in its data directory is p2's or Durable's); (2) Radius Cloud Brain stays
+  on its last v1 bundle and moves separately; (3) p2's web UI is p2 code again (brought back from bundled-ui) and is
+  ported with p2; (4) `createPlugins` replaces p2's own loader (which leaked a module copy per reload); (5) p2 keeps its
+  own SQLite files (catalog, shares, search, subagents) as natives (the rule against plugin databases is p3's); (6) p2's
+  terminal uses Chord's child-process sandbox, exported upstream first; (7) `createHttp` for p2 later, optional; (8)
+  Chord v1 (`src/old`) is deleted right after the switch; (9) p2's v1 plugin tutorial is retired for Chord's guide;
+  (10) the phone gets it after 1-2 days on slayer, about 10 minutes down, rollback by checkout; (11) a small shim
+  reloads pages left open across the deploy, removed with v1. Server, workers, the terminal bundle and the web bundle
+  switch in one deploy (v1 and v2 links do not talk); prep and cleanup steps deploy on their own.
 - **A plugin's npm dependencies are bundled; external only by opt-in (owner, 2026-10-29: "explicit opt in + (a)"):**
   a plugin's `dependencies` are installed into its own `node_modules` (`npm install --ignore-scripts`) and bundled into
   each facet that imports them (host packages, its `peerDependencies`, stay external and are passed in). On Node a