Pre-upload verify request: after capturing the live browser cookies,
hit a known authenticated endpoint with credentials:'include' from the
extension's background context. If the platform reports we're not
logged in, abort the upload so we don't overwrite FC-side credentials
with stale data.
- platforms.js: add `verify` config per cookie-auth platform
- hentaifoundry: HEAD /?enterAgree=1 (mirrors gallery-dl's HF
_init_site_filters; same 401 path the operator hit 2026-06-03)
- patreon: GET /api/current_user (clean 401 when logged out)
- subscribestar, deviantart: no stable auth endpoint, skip verify
- cookies.js: verifyCookiesForPlatform() returns {ok, status, reason}.
ok=true/false/null tri-state — null = verify not configured, caller
treats as "proceed".
- background.js EXPORT_COOKIES + EXPORT_ALL_COOKIES: verify gates the
upload; failures bubble up with the platform's name + reason.
- popup.js: success message now appends "(verified ✓)" when applicable.
- manifest + package.json: 1.0.6 → 1.0.7.
Operator-asked 2026-05-31 (during sidecar synthetic anchor cleanup):
"the add source/subscription button idea to the firefox extension so
it can tell me if a source/artist is added or not and offer an option
to add it if it isn't." Plan tracked in Scribe task #507.
## Backend
- `ExtensionService.probe(url)` — read-only resolution. Reuses
`_derive` for platform+slug, then 2 SELECTs. Returns one of:
- `source_match` (exact (artist, platform, url) Source exists)
- `artist_match` (artist exists, this URL isn't a Source yet;
collapses the sidecar-synthetic-only case from v26.06.01.0)
- `new` (neither exists)
- `unknown_platform` (URL didn't match any artist-page regex)
- `GET /api/extension/probe?url=...` route with `X-Extension-Key`
auth posture matching `/quick-add-source`. Read-only, side-effect
free.
- 6 backend tests in tests/test_api_extension.py covering each state
+ auth + invalid URL.
## Extension
- `api.js`: `probeSource(url)` mirroring `quickAddSource` shape.
- `background.js`: `PROBE_SOURCE` + `OPEN_ARTIST_PAGE` handlers. The
latter strips the `/api` suffix from configured `apiUrl` (placeholder
format per options.html) and opens `${base}/artist/{slug}` in a new
tab via `browser.tabs.create`.
- `content-script.js`: probe-first render — on page-load and SPA
navigation, asks the backend for the URL's state and renders the
chip in the matching color/copy on FIRST paint instead of flashing
generic "Add" and updating after. Click handler branches:
`source_match` → OPEN_ARTIST_PAGE; `artist_match`/`new` → existing
ADD_AS_SOURCE flow (then re-probes so the chip flips green
immediately, no wait for next nav).
- `content-script.css`: three state-color modifiers
(--new, --artist-match, --source-match) on the FC parchment-on-slate
palette. Sage for already-added, amber for artist-exists, accent
orange for new.
## Versioning
- `extension/manifest.json` + `extension/package.json` → 1.0.6.
build.yml's sign-extension job will fire on push to main since no
`ext-1.0.6` Forgejo/Gitea release exists yet — exercises the
regenerated AMO keys end-to-end.
## Behavior on the sidecar-synthetic case
Filesystem-imported "Dymkens"-style artist with only a sidecar
synthetic Source: probe returns `artist_match` (not `new`), so the
chip reads "+ Add Patreon source to Dymkens" rather than offering to
recreate the artist. Clicking adds the real Source; existing
`_source_for_sidecar` preference logic (v26.06.01.0) routes future
gallery-dl Posts to the real one.
bvandeusen