# HANDOFF — session state

> Current operational state, read right after `TASKS.md`. Trust this file as the
> truth of what is in flight — do not re-derive from git/fs unless it points at
> a problem. Conventions: [`schema.md`](schema.md). Rewrite this file at session
> end, compaction, or any interruption.

## Session state (last updated: 2026-08-12)

- **Branch:** `main` — the social bar v2 push is **committed + pushed** (`9873eed`,
  18 files, +1878/−321, 112 tests passing, 0 warnings). Working tree is **dirty
  with the post-push docs backfill only** (ai.md, README.md, TASKS.md schema
  section, THIRD-PARTY-NOTICES.txt) — ready to commit when the user says so.
- **Finished this session (round 3):** user's live-test report said the mastodon
  icon still didn't show for `@gramps@llamachile.tube`. Root cause: the identity
  domain `llamachile.tube` is YunoHost-SSO-gated — `/.well-known/nodeinfo`,
  `/@gramps`, and webfinger all answer with the SSO login page, so nodeinfo
  returned nothing and the icon fell back to the honeycomb glyph. The real
  instance lives at `mastodon.llamachile.tube`, and only the bare root
  `https://llamachile.tube/` 302s to it ("default app" redirect). Fix:
  `HttpSocialValidator.TryFetchFediverseSoftwareAsync` now, when nodeinfo on the
  identity domain fails, follows the root redirect (`ResolveInstanceHostAsync`,
  reads `resp.RequestMessage.RequestUri.Host`) and re-runs the nodeinfo lookup
  on the resolved host. New test `FediverseHandle_RootRedirectToSubdomain_ResolvesSoftware`.
  Build: **0 warnings**. Tests: **112 passing**.
- **What landed (all rounds this session):**
  1. **Fediverse icon resolution** — `DetectService` maps `@user@domain` to the
     new `SocialService.Fediverse` (was `Link`/chain icon). On validate,
     `HttpSocialValidator` best-effort GETs `https://{domain}/.well-known/nodeinfo`,
     follows the first nodeinfo `links[].href`, reads `software.name`, and returns
     it in `SocialLookupResult.FediverseSoftware`. `SocialEntry`/`SocialSlotViewModel`
     carry `FediverseSoftware`; `SocialServiceIcons.LogoDataForFediverse(software)`
     maps it to a bundled logo (mastodon/peertube/pixelfed/misskey/lemmy/pleroma/
     firefish — Simple Icons CC0), falling back to the `FediverseIconData`
     honeycomb glyph for unknown software (GoToSocial/Sharkey/Akkoma aren't in
     Simple Icons). Nodeinfo failure still validates — the glyph falls back.
  2. **Redirect resolution (round 3)** — identity domains that 302 their root
     to the real instance (YunoHost default-app subdomains) resolve software via
     the root redirect when identity-domain nodeinfo is SSO-blocked.
  3. **Persistence** — new `SocialEntry.Software TEXT` column via
     `MigrateSocialEntryTable()` (column-presence pattern, same as the others);
     saved/loaded alongside Service/Handle/ProfileUrl.
  4. **Icon colors** — `IconButton` style gains `Foreground="#d0d0d0"`
     (`Themes/Controls.xaml`); the dialog's trash button overrides
     `Foreground="#e94560"` (`SocialsDialog.xaml`). All other `IconButton`
     usages are `Path` content with explicit `Fill`, so unaffected.
- **Landmines:**
  - `LayoutStore.Socials` is only populated by `Load()` — tests must call
    `store.Load()` before asserting it.
  - `DetectService("justaname")` → **Website** with empty handle; only
    unparseable input or `@user@domain` yields Link/Fediverse.
  - Dialog sign-in provider is `Func<Task<YouTubeChannel?>>`; test fakes must
    return `Task.FromResult` (sync-completed) so the fire-and-forget command
    settles before the next assert.
  - `SocialBarBottomTop = 1040` literal lives in `MainWindow.xaml.cs` (the VM's
    `MasterFrameHeight` is private).
  - `Cancel_AbortsInFlightValidation_WithoutMutatingSlot` relies on the
    BlockingValidator's gate completing synchronously (no
    `RunContinuationsAsynchronously`) — the assertions run after
    `Gate.TrySetResult` returns because the awaited continuation executes inline.
  - Nodeinfo cancellation test cancels mid-lookup via a counting stub; the
    post-fetch `ct.IsCancellationRequested` check is what reports `Canceled`.
  - Round-3 redirect fallback fires only when identity-domain nodeinfo fails;
    the root follow happens automatically (HttpClient default auto-redirect),
    and `RequestMessage.RequestUri.Host` is read from the final response.
- **Next step:** commit + push the docs backfill (ai.md / README.md / TASKS.md
  schema section / THIRD-PARTY-NOTICES.txt) once the user confirms. Nothing
  else queued — do not expand the task queue on your own.

- **Secret/DB/port facts live:** OAuth client id/secret in `Helpers/OAuthCredentials.cs`;
  OAuth session token in `Helpers/TokenStore.cs` (DPAPI → `%APPDATA%\ytLlive\ytLlive.auth`);
  layout DB `%APPDATA%\ytLlive\ytLlive.db` (schema v8; the new `SocialEntry.Software`
  column is a column-presence migration like the others, no version bump); OAuth callback
  `http://localhost:8765/oauth2/callback`; crash log `%APPDATA%\ytLlive\startup.log`.