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peter 8fb276aa90 feat(keys): j/k walk the feed, s finds the search box, g jumps to a module 
A feed card cost ~10 Tab stops, so the tenth card sat ~135 Tabs from the top of the page, and the
only keyboard focus ring (a 60% accent outline on the thumbnail) all but vanished on the dark glass.
First slice of the E11 keyboard layer (S4a); Home, Plex and the tables follow in S4b/S4c.

- `lib/listNav`: one window listener over every registered list, walked in document order. `j`/`k`
  step item to item (on into the next list — owner decision D4), the arrows move around a grid, Enter
  clicks the item's own `data-nav-open` element, so it opens exactly like a click. An item root is
  never a Tab stop: it gets `tabindex=-1` only while the keyboard is on it, and keeps it until the next
  item takes it, so the player's focus restore lands back on the card. The first `j` takes the first
  card you can see, not the top of the list.
- `VirtualGrid` takes part with `keyboardNav` (column count + scrolling an unmounted row in);
  `VirtualFeed` turns it on, so the feed, the library and the channel page all have it.
- Keymap: two-step sequences (`g h`) whose pending step belongs to the scope that started it; the
  page-level scopes (`page`, `search`, `list`) are quiet while a layer that owns the keyboard is open,
  enforced in `dispatch`. A test pins the owner's rule that none of them needs a modifier on the
  Hungarian layout.
- `g h/f/c/p/x/n/m/d/s/,` jump to a module this account can reach; `s` focuses the header search box
  and selects the old query; Escape in it hands the keyboard back to the page (Plex's typeahead spends
  its first Escape on its panel).
- Hover popovers are passive layers: an open tooltip still takes Escape first but no longer silences
  the page keys.
- Focus ring (owner decision D2 = B): solid 2px accent around the whole item; the app-wide button/
  link/row ring goes from 60% to solid too. The item keeps a transparent resting outline because the
  video card transitions `all` — without it every `j` flashed a 3px white ring (measured in Chrome).
- Help sheet: the new keys, in a fixed order after the surface's own; a `g` chord only for a reachable
  module; opened over a player or dialog it leaves out the page-level keys and the context-menu key,
  which nothing can reach there (the latter pre-existing since E10).
- CLAUDE.md: a canonical-patterns row for list/grid keys (`useListNav` + `navItemAttrs` +
  `data-nav-open`, not a private arrow-key handler).
2026-09-13 04:16:20 +02:00

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# CLAUDE.md — working agreement for AI agents on Siftlode
This repository is **fully AI-authored** — every line was written by an AI agent, and it continues to
be developed that way. This file is the rules of the road: read it before you touch anything. It is
loaded into every agent session, so keep it **short and true**. A rule here that has gone stale is
worse than no rule — if you change how the code works, change this file in the same commit.
Siftlode is a self-hosted YouTube reader (+ a local Plex browser/player and a download center). It is a
**modular monolith**: one Postgres, one FastAPI process (uvicorn + APScheduler), one worker process
(yt-dlp/ffmpeg), one PO-token sidecar. React 18 + react-query frontend with a router-free navigation
provider.
## The gate — never merge or ship red
The local gate is **ruff (`check` + `format --check`) + typecheck (3 tsc projects) + eslint + prettier
--check + knip + vitest + pytest**. It runs on every `publish`, which **refuses to build on failure — there is deliberately no
`--skip` flag.** Run it and get it green **before** any merge, release, or handing work to review.
- Full gate (agents with the private ops dispatcher): `siftlode check`.
- Directly, without the dispatcher: `cd frontend && npm run typecheck && npm run lint && npm run knip && npm run test`, plus backend `ruff check backend` + `ruff format --check backend` and `pytest` (the DB-lane needs Postgres).
- New DB-backed test? It must actually run, not silently skip — assume `SIFTLODE_TEST_REQUIRE_DB=1`.
## Workflow
- **Trunk model.** One long-lived branch, `main`. Branch off it (`feature/`, `bug/`, `improvement/`),
keep commits logical and Conventional-Commit-styled.
- **No AI attribution in commits.** No `Co-Authored-By` trailer, no "generated by" lines. (This file
being AI-written is the intended, visible exception; commits are not.)
- **Release: user-owned in timing, agent-run in execution.** The user decides _when_ to ship; on their
go-ahead _you_ run `siftlode release` from the feature branch (merge to `main` → publish → deploy →
verify `/api/version`). Never self-ship — bring work to a green, committed state and stop for the
go-ahead first, then run it yourself.
- **Public repo.** Keep ops/topology/secrets out — those live in a separate private repo. Nothing here
should assume or leak them.
## Collaboration — how to work with the human
The human is the product owner: they bring ideas and requirements. You are the technical lead — you own
how it gets built. Concretely:
- **Plan before you build.** For anything non-trivial, present a short plan (sprint-level for larger
work) and get a go-ahead before writing code.
- **Offer choices, mark the optimal — and explain the trade-off.** When several solutions are viable,
list them and mark the recommended one. This is the _one_ place to spend extra words: give the _why_
behind each option and the weight of the decision. These decision points are where the product owner
engages with the build and learns from it, so make them understandable — a reasoned menu, not a bare one.
- **Mockups for design/UX decisions.** For any visual or interaction choice, show mockup options to
choose from before building.
- **Challenge unsound requests.** If a request is technically ill-advised and you can back it with real
arguments, push back or propose an alternative — don't comply blindly.
- **Verify UI in the browser before calling it done.** tsc/unit/DOM tests miss visual and interaction
bugs; do a real visual check of any UI change.
- **Be terse everywhere else.** Outside those decision points, lead with the answer or decision. During
implementation and debugging especially: no restating the same point reworded, no filler.
## Architecture shape (don't fight it)
`routes/*` (HTTP only: validation, auth-dependency, serialization) → domain packages `sync/`, `plex/`,
`downloads/`, `youtube/` (shared by routes + scheduler + worker) → flat core (`auth`, `quota`,
`sysconfig`, `state`, `audit`, `notifications`, `userscope`, `realtime`, `ratelimit`, `progress`,
`security`) → `models/db/config`. **Dependency direction is one-way: core never imports routes.**
Frontend: `main.tsx` provider tree → `App.tsx` shell → `moduleRegistry` route-chunks → module
components → the **platform layer `components/ui/`** (domain-free primitives: the popover engine and
its menus, `Modal`/`Overlay`, `Button`/`form`, `DataTable`/`VirtualGrid`, `QueryState`, …). That
boundary is one-way and **lint-enforced**, not just described: a platform component may not import a
feature component or a domain API slice, and one layer down `lib/` may not import from `components/` at
all, not even a type (`no-restricted-imports` in `eslint.config.js`, with its own test). A new generic
component goes in `ui/`; see [`frontend/src/components/ui/README.md`](frontend/src/components/ui/README.md).
Data via react-query (`qk` factory), per-account `localStorage`, and server prefs; API through
`lib/api/*` slices over `core.req<T>`.
**Not wanted** (reviewed and rejected as over-engineering for this size): microservices, event bus,
CQRS, a repository/DI framework, a router library, a generic CRUD-router factory or base serializer.
## Canonical patterns — when you have a choice, pick THIS
| Area | Use | Not |
| ----------------------- | ------------------------------------------------------------ | ------------------------------------------------------ |
| ORM | SQLAlchemy 2.0 `select()` | `db.query(...)` |
| Request body | a Pydantic model | `payload: dict` |
| Ownership check | `owned_or_404` / `get_or_404` | ad-hoc `_own_playlist`/`_owned`/`_own_job` |
| Admin gate import | `app.auth` | the `app.routes.admin` re-export |
| Upstream failure status | `422` with JSON detail | `502` (reserve 502 for raw byte-proxies) |
| User-facing error | structured `detail` (`{code, reason}`) | a bare English string under a bilingual UI |
| Mutation response | `{"ok": true, …}` (`{"deleted": id}`) | ad-hoc `{"unsubscribed"}`/`{"cleared": n}`/echo |
| Transaction commit | the handler/job-wrapper commits; helpers `flush` | helpers that commit (only `quota` owns its session) |
| Admin knob storage | `sysconfig` (values) | env / `app_state` / `scheduler_settings` scatter |
| Job status word | the `downloads/status.py` StrEnum | loose `"canceled"`/`"cancelled"` literals |
| Current time | inline `datetime.now(timezone.utc)` | new `now_utc`/`_now` helpers |
| FE per-account state | `usePref` | raw `readAccount`/`writeAccount` or bespoke hooks |
| FE action button | `ui/Button` — pick a `SIZES` rung | a hand-rolled `<button className="px-3 py-2 …">` |
| FE keyboard shortcut | a row in `lib/keymap.ts` + `dispatch()` | a private `keydown` listener with its own key literals |
| FE list/grid keys | `useListNav` + `navItemAttrs(i)` + one `data-nav-open` | a private arrow-key / roving-tabindex handler |
| FE control | the chip/segmented primitives (`Select` only for >6 options) | a native `<select>` |
| FE loading/empty/error | `QueryState` / `StateMessage` | ad-hoc conditionals |
| FE failed write | `meta.failTitle`, else `notifyActionError(err, title)` | a bare `catch {}` or `notify()` with no error attached |
## House rules that bite (learned from real bugs)
- **A rule stated in a comment must also be enforced in code.** The worst bugs here came from a comment
and the code/migration drifting apart (a `cancelled`≠`canceled` literal killed a cancel path). Put the
invariant in an enum/constant/shared function, not in prose.
- **Fix a principle everywhere, in one sweep.** If you correct one owner/commit/serialization site,
`grep` for the siblings and fix them too — asymmetric fixes are a recurring smell here.
- **Honest states.** An error must not render as an empty state; a swallowed failure must not look like
"no results". Reads degrade honestly; writes are conditional (`UPDATE … WHERE status='running'`).
- **i18n parity.** HU/EN, zero key drift. Every user-facing string is translated.
- **Comment the "why", keep it current.** This codebase uses comments as its architecture doc; a stale
"why" is a liability, so update it when the behavior changes.
---
_Run-it-locally and the full gate commands live in [`docs/development.md`](docs/development.md); backend
code conventions in [`backend/app/README.md`](backend/app/README.md). This file stays the source of
truth for the canonical-patterns table and the gate/workflow/collaboration rules above._
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