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 - [x] The human developer understands the security model in the auth in this project. (Two README sections. [Users, groups & permissions](README.md#users-groups--permissions) carries the weight: the entity model, a worked graph, a per-route can/cannot walkthrough, and the trap that a per-row grant never widens a coarse gate — placed before Building plugins because a manifest's `permission:` gate is unreadable without it. [Security model](README.md#security-model) is deliberately short, only the facts a deployment gets wrong without them: the private network as the *only* guard on the Ory APIs, signed-not-encrypted claims, the 30-day Kratos session behind the ~10m JWT, and non-instant offboarding. The first attempt answered the *threat* model instead — a 12-row attack/defense table — which was the wrong question and mostly restated code readable at its source; cut. Also corrected the hardening checklist: `REQUIRE_SECURE_SECRETS` guards only `CSRF_SECRET`, so the committed Kratos/Hydra/Postgres/demo-admin secrets are now listed in "What you must supply". The mandatory-`exp` guard gained a test in `src/auth/jwt-middleware.test.ts`.)
 - [x] Add i18n support. (Catalogs are TS modules per locale — `src/i18n/locales/<tag>.ts` for the host, `plugins/<id>/i18n/<tag>.ts` for a plugin, looked up plugin-first then core; en-US + sv-SE ship. A request is served by `?locale=sv-SE` → `Accept-Language` → `en-US`, exact on a full tag but a lone language takes the first regional catalog; no cookie — when the URL asked, the host carries `?locale` onto the links it renders and `ctx.localeHref()` does it for a plugin's. `ctx.t(key, vars)` plus `t`/`locale`/`locales`/`localeHref`/`dir` merged into every view (any include depth); `{{var}}` interpolation, plurals via `Intl.PluralRules`, an unknown key renders as itself — which is what makes a nav label either a key or plain text. Every catalog is checked against its set's en-US at boot (keys, kind, plural categories) and a mismatch stops startup. Kratos' own flow text is mapped by its numeric id (only ids verified against the live stack; its generic trait-label id is deliberately unmapped, field labels key on the input name instead). Zero-JS language picker in the shell + the auth/consent pages, `<html lang dir>` from the locale. Core, both example plugins and their views translated; unit tests + `e2e-tests/language.spec.ts` in the visual gate; documented in README → Languages, decisions in AGENTS.md.)
 - [x] Settle the identity-vs-user vocabulary. (Plainpages says **user** everywhere — Keto namespace `User`, subjects `user:<kratos-id>`, `ctx.user`. Ory calls the record an "identity", but its own docs say it uses that term interchangeably with "users"/"accounts", so this is house style rather than a renamed concept, and "user" is the word readers know (Nielsen heuristic #2). README → Auth carries one note recording the mapping; the only place Ory's spelling survives is the `Identity` DTO in `src/auth/kratos-admin.ts`, which mirrors the Kratos wire shape. Recorded in AGENTS.md.)
+- [ ] Guard against the double-clicked submit, without client-side JavaScript. The README's non-technical persona double-clicks a button that doesn't respond instantly, so a second identical POST is an expected event, not misuse — today it creates two users, mints two recovery codes, or registers two OAuth2 clients. Constraints: HTML/CSS only (no client JS — priority: zero-JS spine), and it must not break an action that is *legitimately* repeatable (an increase-by-one button is not a duplicate, it is two increments). Sketch to evaluate: a CSS-only affordance so the second click has nothing to hit (`:active`/`:focus` state, or the submit visually and semantically settling), paired with the host recognising a duplicate on the server — same session, same route, same payload, within a short window — and then logging it and dropping the second rather than replaying it. Open questions: what identifies "the same submission" (a one-time token minted into each rendered form is stronger than hashing the payload, and the CSRF plumbing already mints per-request tokens), how long the window is, where the record lives given the app is stateless (in-memory like the revoke denylist, or push it to the upstream the plugin already writes to), and how a plugin declares a route as repeatable — an opt-out on the route, or opt-in per form. Raised 2026-08-04 with the personas.
 - [ ] Decide the caching contract for rendered pages. Responses now carry `Vary: Accept-Language` (they content-negotiate), but nothing sets `Cache-Control` — so a shared cache in front of the app has no instruction, and a signed-in page is not marked `private`. Pre-existing, surfaced by the i18n review 2026-08-03: either set the headers deliberately (public pages cacheable, gated pages `private, no-store`) or record in AGENTS.md that the reverse proxy owns this.
 - [ ] Decide whether the single generic Keto `Resource` namespace should become per-domain namespaces (`Shift`, `Document`, …), as Ory's own examples model it. One global `Resource` bucket is the project's own "no catch-all names" rule (`utils`, `helpers`, `misc`) applied to namespaces. Raised 2026-08-03; a design question, not a naming one.
 - [ ] Decide (once) whether the CSRF token staying unbound to `sub`/session is accepted. `src/auth/csrf.ts` signs `<nonce>.<HMAC(secret, nonce)>` with no session binding, so any validly-signed token passes for any user — an attacker who can write cookies on the origin (a sibling subdomain, or a plaintext hop with `SECURE_COOKIES=false`) can fix a token they know. Standard for unbound signed double-submit and plausibly fine behind `SameSite=Lax` + HSTS. Accepted ⇒ record it in AGENTS.md → "Deliberate architectural deviations" and in README → Security model under "Not guaranteed"; not accepted ⇒ bind the nonce to `sub` (small change). Raised by review 2026-08-02; left undecided because it is a maintainer call, and an undocumented exception reads as a bug to the next reviewer.