Cut non-essential prose from docs and comments, and require the same of every future change

README loses the competitor comparison, the personas and the repeated philosophy; the
five near-identical E2E command blocks become a table plus one command, and the file
map a clause per entry. AGENTS.md keeps every decision but drops the narrative around
them. todo.md's completed items collapse to their task line — git holds the rest.

Comments lose restatement, README duplication and history ("used to", "originally",
dated notes). AGENTS.md gains a Prose discipline section making this a standing pass on
every change rather than a one-off cleanup.

src/compose.test.ts now expects 6 documented E2E run commands, not 10, since the README
states the command once instead of per suite.

examples/plugins/admin/admin-grants.test.ts

@@ -46,9 +46,9 @@ test("buildPermissionPicker ticks what is held and carries each declaration's de
   assert.equal(picker.inheritedNote, undefined); // nothing is group-held here
 });
 
-// The failure this prevents: a permission held through a group used to render unticked, so the page
-// said "not held" about a grant that reaches the JWT — and unticking it wrote nothing, which read as
-// a successful revoke. Inherited rows are ticked, disabled, and never posted.
+// An inherited permission rendered unticked would say "not held" about a grant that reaches the JWT,
+// and unticking it writes nothing, reading as a successful revoke. So inherited rows are ticked,
+// disabled, and never posted.
 test("buildPermissionPicker distinguishes a direct grant from one inherited through a group", () => {
   const picker = buildPermissionPicker({ action: "/x", declared, direct: ["users:write"], effective: ["users:read", "users:write"] });
   assert.deepEqual(picker.choices.map((c) => [c.name, c.checked, c.inherited]), [