fix: an asleep browser Lane is not a stalled one on the admin page

laneRow.Stalled was Due > 0 && Checked == 0, which is exactly the shape
of the on-demand wake gate declining to start Chrome (ADR-0005): under
five due Series and none overdue by 15m, a browser Lane reads nothing on
purpose. kagane and novelfull each have one bookmarked Series, so that is
their state for most of every cycle and the page marked both "not
checking" — spending the one mark that means "go look" on the commonest
healthy state.

LaneState.Asleep is set at the wake gate, excluded from Stalled, kept out
of Attention, and rendered as "browser asleep". Verified in prod: those
Lanes wake on the age rule 15m past due (kagane and novelfull both polled
at 14:55Z for a 14:40Z due moment, novelfull picking up Chapter 4458).

backend/AGENTS.md

@@ -27,7 +27,8 @@ Guidance for OpenCode (and Claude Code) working under `backend/`. See root `AGEN
   `series` keyed `(site, series_id)`
   (`asura`|`demonic`|`comix`|`kagane`|`novelfull`|`lightnovelworld`) owns the
   shared facts — title, cover, canonical URL, `kind` (`manga`|`novel`),
-  Latest Chapter, `latest_checked_at` — and `bookmarks` holds only what
+  Latest Chapter, `latest_checked_at`, and the Sighting pair
+  `latest_sighted_at`/`latest_raised_by` (issue #103) — and `bookmarks` holds only what
   differs between readers: progress, favourite, lifecycle bucket,
   `updated_at`. A bookmark is keyed `(reader_id, site, series_id)` — no
   surrogate id; the wire `key` is derived as `site:series_id` on read — and
@@ -78,7 +79,9 @@ Guidance for OpenCode (and Claude Code) working under `backend/`. See root `AGEN
   each re-checking that Site's bookmarked series' newest published chapter from
   backend's own network access, so `latest_chapter` stays fresh when the user
   isn't browsing. Second, parallel signal — the userscript keeps its own
-  `maybeCaptureLatestOnSeriesPage`/`backgroundRefreshLatest` logic unchanged.
+  `maybeCaptureLatestOnSeriesPage`/`backgroundRefreshLatest` schedule, and its
+  `reportLatestChapter` PUTs every read, unchanged numbers included, because an
+  unchanged read is exactly the Sighting worth deferring a Poll on (#103).
   Two independent clocks: per-series rest (`series.latest_checked_at`,
   enforced by `Store.DueForLatestCheck`'s WHERE clause — `now - Rest`) and
   per-Lane gap (the Lane sleeping between fetches, `effectiveGap`). Both live
@@ -91,6 +94,29 @@ Guidance for OpenCode (and Claude Code) working under `backend/`. See root `AGEN
   every tick; found chapter written straight to the series row via
   `Store.SetLatestChapter`, so a bookmark's `updated_at` — and the list
   order — is never touched.
+  **Sightings** (issue #103, ADR-0011) let a Reader's own page read defer a
+  Poll: `Store.RecordSighting` — called by the PUT handler *before* the Upsert,
+  because the raise test needs the row as it stands — stamps
+  `series.latest_sighted_at` and, when the report raises the stored number,
+  names its Reader in `series.latest_raised_by`. The due query's HAVING clause
+  is where deferral lives: a Series is skipped only while it has exactly one
+  Bookmark, was sighted within one Rest, and is under the ceiling
+  (`sightingCeilingRests`, six of that Site's rests) since its last Poll. So a
+  shared Series is never deferred, and no Series goes six hours unpolled
+  whatever arrives. `checkOne` judges the named Reader off the comparison it
+  already makes: a lower number is a contradiction (logged with the Reader and
+  both numbers), the same number an agreement, a higher number the Site
+  publishing and neither — that last one clears the attribution instead, since
+  the value the Poll then stores is its own and a later retraction is not the
+  Reader's fault. Three contradictions
+  (`store.SightingDisagreementLimit`) stop that Reader deferring — their
+  reports still write the Latest Chapter — and twenty consecutive agreements
+  (`store.SightingAgreementsToClear`) forgive them, as does the owner's
+  clear-marks control. Deferral is recomputed from live facts every round, so
+  nothing needs invalidating when a Series gains a second Bookmark; the one
+  input read earlier is the Reader's marks, checked when the Sighting is
+  recorded, so crossing the threshold or being cleared takes effect from that
+  Reader's next Sighting and the standing already bought lasts out its rest.
   Refusals and browser loss are Lane-local: two `errChallengeHeld` in one pass
   stop that Site for `refuseBackoff` (15m) while other Lanes continue; an
   `errBrowserInterrupted` (remote Chrome restart) sets a shared Poller flag
@@ -101,6 +127,13 @@ Guidance for OpenCode (and Claude Code) working under `backend/`. See root `AGEN
   and cover work (both healing a stored source URL and filling a blank from
   the series page) runs in the background so a slow CDN can't consume a
   Lane's gap.
+  A refusal is only ever the challenge *page*: `isInterstitial` matches the
+  orchestration path `/cdn-cgi/challenge-platform/h/`, never the bare prefix.
+  Cloudflare injects `/cdn-cgi/challenge-platform/scripts/jsd/main.js` into
+  ordinary 200 pages once a zone turns JS detections on, which demonic did on
+  2026-08-16 — the prefix match then read every real demonic page as a refusal
+  and parked that Lane in 15m backoff while plain TLS was returning the full
+  series page.
   Fetches use `bogdanfinn/tls-client` with Chrome profile as defence in depth
   against fingerprint-based blocking; any failure log and skip. kagane, comix
   and novelfull sit behind Cloudflare JavaScript challenges the TLS client
@@ -211,6 +244,31 @@ Guidance for OpenCode (and Claude Code) working under `backend/`. See root `AGEN
   `POST /rotate-token` (atomic epoch bump + hash
   rewrite; invalidates every installed copy, so the panel warns to reinstall
   on all devices).
-  Owner-only `POST /readers/{id}/revoke` (drops one Reader's session rows and
-  re-renders the `readers` panel; 404 for any non-owner) is the only route that
-  reaches across Readers.
+- **Owner-only admin page (`internal/web/admin.go`, issue #102):** `GET /admin`
+  carries the Reader roster (sessions, Sighting counters, `POST
+  /readers/{id}/revoke` and `POST /readers/{id}/clear-marks`) and Poll Lane
+  status (`GET /ui/admin/lanes`, self-refreshing every 30s). Every route that
+  reaches past the acting Reader is listed in `adminRoutes()` and wrapped in
+  `requireOwner` at registration — add a route there, not a check inside a
+  handler; `web.AdminPatterns()` is what the gate test walks. A non-owner gets
+  404, never 403. Lane figures come from the running poller through the
+  `web.LaneReporter` seam (`latest.Poller.LaneStatus`), never from a table: a
+  nil reporter or a Lane that has not finished a pass renders "no data yet"
+  rather than zeroes. `main.newRouter` takes the reporter as an interface and
+  converts a nil `*Poller` to a nil interface — a typed nil would make the page
+  claim a poller exists.
+  The one owner comparison left outside `requireOwner` is in `index`
+  (`view.Owner = readerID == h.store.OwnerID()`): it gates a link, not an
+  endpoint, so it is a rendering decision a registration-time wrapper cannot
+  express — do not "unify" it into the gate.
+  A Lane pass that returns before computing its figures (refusal backoff,
+  sidecar down) carries the previous pass's due count and gap forward rather
+  than recording zeroes; a Lane that has never reached a pace renders no gap at
+  all. `Checked` next to `Due` is what separates a stopped Lane from a quiet
+  one, so neither figure may be dropped from the row.
+  Due-without-Checked is *not* by itself a stall: a browser Lane under both
+  wake thresholds sets `LaneState.Asleep` at the on-demand gate and renders
+  "browser asleep" instead of "not checking", and never counts toward
+  `Attention`. That is the commonest healthy state for kagane, comix and
+  novelfull — one due Series, nothing checked — so spending the stall mark on
+  it would train the owner to ignore the mark that matters.

backend/api_test.go

@@ -48,7 +48,7 @@ func TestMain(m *testing.M) { os.Exit(pgtest.Main(m)) }
 
 func newTestServer(t *testing.T) http.Handler {
 	t.Helper()
-	return newRouter(newTestStore(t), testConfig())
+	return newRouter(newTestStore(t), testConfig(), nil)
 }
 
 func newTestStore(t *testing.T) *store.Store {
@@ -599,7 +599,7 @@ func TestLoadConfigDiscord(t *testing.T) {
 // cooldown and the poller would re-fetch that series on every single tick.
 func TestPutDoesNotClobberLatestCheckedAt(t *testing.T) {
 	s := newTestStore(t)
-	srv := newRouter(s, testConfig())
+	srv := newRouter(s, testConfig(), nil)
 
 	seedForCheck(t, s, "asura:x", "https://asurascans.com/comics/x", 777)
 
@@ -621,6 +621,46 @@ func TestPutDoesNotClobberLatestCheckedAt(t *testing.T) {
 	}
 }
 
+// Sighting deferral (issue #103) only reaches production through the PUT
+// handler: the store and poller can be right and the feature still dead if the
+// handler never records the report. Asserted where a client can see it - the
+// series stops being due the moment the PUT lands.
+func TestPutRecordsASighting(t *testing.T) {
+	s := newTestStore(t)
+	srv := newRouter(s, testConfig(), nil)
+
+	now := time.Now().UnixMilli()
+	hour := time.Hour.Milliseconds()
+	seedForCheck(t, s, "asura:x", "https://asurascans.com/comics/x", now-2*hour)
+	due, err := s.DueForLatestCheck("asura", now-hour, now-6*hour)
+	if err != nil {
+		t.Fatalf("DueForLatestCheck: %v", err)
+	}
+	if len(due) != 1 {
+		t.Fatalf("due before the PUT = %d series, want 1", len(due))
+	}
+
+	body := `{"key":"asura:x","site":"asura","series_id":"x",
+		"series_url":"https://asurascans.com/comics/x",
+		"last_chapter":"Chapter 5","last_chapter_num":5,
+		"latest_chapter":"Chapter 9","latest_chapter_num":9}`
+	req := httptest.NewRequest(http.MethodPut, "/bookmarks/asura:x", strings.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	rec := httptest.NewRecorder()
+	srv.ServeHTTP(rec, auth(req))
+	if rec.Code != http.StatusOK {
+		t.Fatalf("PUT status = %d, want 200 (body %s)", rec.Code, rec.Body.String())
+	}
+
+	due, err = s.DueForLatestCheck("asura", now-hour, now-6*hour)
+	if err != nil {
+		t.Fatalf("DueForLatestCheck: %v", err)
+	}
+	if len(due) != 0 {
+		t.Fatalf("due after the PUT = %d series, want 0: the handler recorded no Sighting", len(due))
+	}
+}
+
 // The userscript route is registered outside the web UI's Discord auth, so it
 // must keep working whatever the web config — see internal/userscript for the
 // handler's own behaviour. The credential in the path is the owner's derived
@@ -637,7 +677,7 @@ func TestUserscriptServedWithWebUIDisabled(t *testing.T) {
 
 	rr := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodGet, "/u/"+ownerCredential()+"/manga-bookmark.user.js", nil)
-	newRouter(s, cfg).ServeHTTP(rr, req)
+	newRouter(s, cfg, nil).ServeHTTP(rr, req)
 	if rr.Code != http.StatusOK {
 		t.Fatalf("status = %d, want 200", rr.Code)
 	}
@@ -659,7 +699,7 @@ func TestNovelUserscriptServed(t *testing.T) {
 
 	cfg := testConfig()
 	cfg.NovelUserscriptPath = novelPath
-	srv := newRouter(s, cfg)
+	srv := newRouter(s, cfg, nil)
 
 	rr := httptest.NewRecorder()
 	srv.ServeHTTP(rr, httptest.NewRequest(http.MethodGet,

backend/cover_test.go

@@ -98,7 +98,7 @@ func TestPublicCoverNeverEchoesNonImage(t *testing.T) {
 	if _, err := db.Exec(`UPDATE covers SET content_type = 'text/html' WHERE address = $1`, address); err != nil {
 		t.Fatalf("poison row: %v", err)
 	}
-	rr := getCover(t, newRouter(st, testConfig()), "/covers/"+address, nil)
+	rr := getCover(t, newRouter(st, testConfig(), nil), "/covers/"+address, nil)
 	if rr.Code == http.StatusOK {
 		t.Fatalf("status = 200, want a refusal for a non-image row (body %q)", rr.Body.String())
 	}

backend/internal/api/handlers.go

@@ -99,7 +99,18 @@ func (h *Handler) Put(w http.ResponseWriter, r *http.Request) {
 	// reading progress actually moved. Any client value is ignored.
 	b.UpdatedAt = time.Now().UnixMilli()
 
-	stored, err := h.Store.Upsert(httpmw.ReaderID(r), b)
+	// A userscript PUT is a Sighting: the Reader's browser was on the Series
+	// page and read its Latest Chapter (issue #103). Recorded before the
+	// Upsert, which is what makes the raise comparison possible, and never
+	// from the web UI's own read-modify-write — a Reader toggling a favourite
+	// has not looked at the Site and must not postpone a Poll. A failure here
+	// costs a deferral, not the write, so it is logged and dropped.
+	readerID := httpmw.ReaderID(r)
+	if err := h.Store.RecordSighting(readerID, b.Site, b.SeriesID, b.LatestChapterNum, b.UpdatedAt); err != nil {
+		log.Printf("record sighting: %v", err)
+	}
+
+	stored, err := h.Store.Upsert(readerID, b)
 	if err != nil {
 		log.Printf("upsert: %v", err)
 		http.Error(w, "internal error", http.StatusInternalServerError)

backend/internal/latest/browser.go

@@ -250,11 +250,18 @@ func browserConnectionLost(ctx context.Context) bool {
 const challengePollInterval = 2 * time.Second
 
 // isInterstitial reports whether html is Cloudflare's challenge page rather
-// than the site's own. Matched on the challenge runtime's script path, which is
-// stable across the interstitial's wording and locale — the visible "Just a
+// than the site's own. Matched on the challenge orchestration path
+// (/cdn-cgi/challenge-platform/h/<b|g|x>/orchestrate/...), which is stable
+// across the interstitial's wording and locale — the visible "Just a
 // moment..." title is neither.
+//
+// The bare "/cdn-cgi/challenge-platform/" prefix is NOT enough: Cloudflare
+// injects /cdn-cgi/challenge-platform/scripts/jsd/main.js into ordinary 200
+// pages when JS detections are on, so matching the prefix declared every real
+// demonic page a refusal and parked that Lane in 15m backoff (observed
+// 2026-08-16, demonic turned detections on).
 func isInterstitial(html string) bool {
-	return strings.Contains(html, "/cdn-cgi/challenge-platform/")
+	return strings.Contains(html, "/cdn-cgi/challenge-platform/h/")
 }
 
 // run navigates to target and re-reads until done reports an answer, bounded by

backend/internal/latest/browser_test.go

@@ -117,6 +117,25 @@ func TestBrowserOnlyCoverURL(t *testing.T) {
 		})
 	}
 }
+
+// The jsd script is injected into ordinary 200 pages when a zone turns JS
+// detections on; only the orchestration path means the page itself is the
+// challenge. Conflating the two parked the demonic Lane in refusal backoff
+// while every fetch was in fact the real series page (observed 2026-08-16).
+func TestIsInterstitial(t *testing.T) {
+	if !isInterstitial(challengeFixture) {
+		t.Fatal("challenge page not detected as interstitial")
+	}
+	const jsdInjected = `<html><head><title>The Possessed Grappler</title>
+<script src="/cdn-cgi/challenge-platform/scripts/jsd/main.js"></script></head>
+<body><a  href="/chaptered.php?manga=13721&chapter=22">Chapter 22</a></body></html>`
+	if isInterstitial(jsdInjected) {
+		t.Fatal("real page carrying the injected jsd script misread as interstitial")
+	}
+	if got, ok := demonicLatestChapter("", jsdInjected); !ok || got.Label != "Chapter 22" {
+		t.Fatalf("demonicLatestChapter = %+v, ok = %v, want Chapter 22", got, ok)
+	}
+}
 func TestClassifyBrowserInterruption(t *testing.T) {
 	if err := classifyBrowserError(context.Background(), true, context.Canceled); !errors.Is(err, errBrowserInterrupted) {
 		t.Fatalf("classifyBrowserError(context.Canceled) = %v, want browser interruption", err)

backend/internal/latest/poller.go

@@ -57,6 +57,10 @@ type Poller struct {
 	mu            sync.Mutex
 	refuseUntil   map[string]time.Time
 	browserDownAt time.Time
+	// laneStates is the owner's page snapshot of each Lane's last pass
+	// (issue #102), keyed by Site. Guarded by mu; a Site appears only after
+	// its first pass, so a restart renders "no data yet" rather than zeroes.
+	laneStates map[string]LaneState
 	// coverWG tracks in-flight cover work. Covers heal in the background so a
 	// slow cover host cannot delay the next Series-page Poll; tests join it
 	// before asserting on cover fetches.
@@ -218,6 +222,10 @@ func (p *Poller) runOnce(ctx context.Context) {
 // production Lane's rate limit; the deterministic test entry runs back to back.
 func (p *Poller) runLanePass(ctx context.Context, name string, paced bool) time.Duration {
 	now := p.Now()
+	// Snapshot this pass for the owner's page (issue #102). Recorded on every
+	// return path, with the figures filled in where the pass computes them.
+	st := LaneState{Site: name, LastRun: now, Browser: isBrowserSite(name)}
+	defer func() { p.recordLaneState(st) }()
 	if until := p.refusalBackoff(name); now.Before(until) {
 		// Cooling down after a refusal: do not attempt this Site at all.
 		return until.Sub(now)
@@ -238,18 +246,24 @@ func (p *Poller) runLanePass(ctx context.Context, name string, paced bool) time.
 		// No fetcher at all right now (browser absent, no fallback): every
 		// Series stays unstamped and due, so a browser that appears after a
 		// restart finds its full queue waiting (issue #100).
+		st.Gap = defaultGap
 		return defaultGap
 	}
 
-	due, err := p.Store.DueForLatestCheck(name, now.Add(-s.Rest).UnixMilli())
+	due, err := p.Store.DueForLatestCheck(name, now.Add(-s.Rest).UnixMilli(),
+		now.Add(-sightingCeilingRests*s.Rest).UnixMilli())
 	if err != nil {
 		log.Printf("latest poll %s: due query: %v", name, err)
+		st.Gap = defaultGap
 		return defaultGap
 	}
+	st.Due = len(due)
 	if s.Browser != nil && f == p.BrowserFetch && !browserWakeDue(due, now, s.Rest) {
 		// Below both thresholds Chrome stays asleep (ADR-0005 on-demand
 		// browser): waking it for a single Poll would cost a challenge solve
-		// per request.
+		// per request. The Lane still paces at the default gap, which is what
+		// the owner's page must show rather than a zero.
+		st.Gap, st.Asleep = defaultGap, true
 		return defaultGap
 	}
 	if s.Browser != nil {
@@ -265,9 +279,11 @@ func (p *Poller) runLanePass(ctx context.Context, name string, paced bool) time.
 	eligible, err := p.Store.EligibleSeriesCount(name)
 	if err != nil {
 		log.Printf("latest poll %s: eligible count: %v", name, err)
+		st.Gap = defaultGap
 		return defaultGap
 	}
 	gap, clamped := effectiveGap(s, eligible)
+	st.Gap, st.Clamped = gap, clamped
 	if clamped {
 		log.Printf("latest poll %s: gap clamped to %s floor (eligible series=%d)", name, minGap, eligible)
 	}
@@ -278,7 +294,6 @@ func (p *Poller) runLanePass(ctx context.Context, name string, paced bool) time.
 	}
 
 	refusals := 0
-	checked := 0
 	for i, sr := range due {
 		if ctx.Err() != nil {
 			break
@@ -313,10 +328,10 @@ func (p *Poller) runLanePass(ctx context.Context, name string, paced bool) time.
 		} else {
 			refusals = 0
 		}
-		checked++
+		st.Checked++
 	}
-	if checked > 0 {
-		log.Printf("latest poll %s: due=%d checked=%d", name, len(due), checked)
+	if st.Checked > 0 {
+		log.Printf("latest poll %s: due=%d checked=%d", name, len(due), st.Checked)
 	}
 	if refusals >= 2 {
 		p.setRefusalBackoff(name, now.Add(refuseBackoff))
@@ -447,6 +462,11 @@ func (p *Poller) checkOne(ctx context.Context, sr store.Series) error {
 		return nil
 	}
 
+	// The Poll is the oracle for whatever Sighting last raised this Series
+	// (issue #103), and the judgement is free: the comparison below already
+	// exists, and no extra request is made to reach it.
+	p.judgeSighting(sr, facts.Latest.Num)
+
 	// Equality, not >, mirroring the userscript (L427): a site that retracts a
 	// chapter should correct the stored number downward. The comparison is
 	// against the due-query snapshot; a concurrent write in between only costs
@@ -467,6 +487,43 @@ func (p *Poller) checkOne(ctx context.Context, sr store.Series) error {
 	return nil
 }
 
+// judgeSighting settles the Sighting the Series' stored Latest Chapter is owed
+// to, if any, against what the Site actually publishes. The asymmetry is the
+// whole of the detection rule and is what keeps it free of false alarms: a Poll
+// finding a *lower* number than stored means the Reader who raised it reported
+// a chapter that does not exist, while a Poll finding a higher one is only the
+// Site publishing since and means nothing about the report. Equality confirms
+// the report, which is how an honest Reader earns back a mark.
+//
+// A Series with no attribution — the stored value is a Poll's own, or a
+// previous Poll already judged the report — is nobody's to answer for.
+func (p *Poller) judgeSighting(sr store.Series, found float64) {
+	if sr.LatestRaisedBy == nil || sr.LatestChapterNum == nil {
+		return
+	}
+	stored := *sr.LatestChapterNum
+	if found > stored {
+		// The report is neither confirmed nor contradicted, but it is answered:
+		// the value about to be stored is the Poll's own, so leaving the
+		// attribution would credit this Reader with the next Poll's agreement
+		// and blame them if the Site later retracts.
+		if err := p.Store.ClearSightingAttribution(sr.Site, sr.SeriesID, *sr.LatestRaisedBy); err != nil {
+			log.Printf("latest poll %q: clear sighting attribution: %v", sr.Key(), err)
+		}
+		return
+	}
+	if found < stored {
+		// Logged with both numbers and the Reader, because that is what tells a
+		// broken Site adapter (which marks every Reader of that Site at once)
+		// from one Reader deliberately lying.
+		log.Printf("latest poll %q: sighting contradicted: reader %d raised it to %v, site publishes %v",
+			sr.Key(), *sr.LatestRaisedBy, stored, found)
+	}
+	if err := p.Store.RecordSightingOutcome(sr.Site, sr.SeriesID, *sr.LatestRaisedBy, found == stored); err != nil {
+		log.Printf("latest poll %q: record sighting outcome: %v", sr.Key(), err)
+	}
+}
+
 // healCover runs prefetchCover in the background. Cover bytes come from a
 // different host — often a CDN — and heal once in a Series's life, so they
 // must not consume a Lane's gap: a large import with many blanks would

backend/internal/latest/poller_test.go

@@ -1388,6 +1388,11 @@ func TestBrowserLaneWakeThresholds(t *testing.T) {
 	if got := browser.callCount(); got != 0 {
 		t.Fatalf("browser fetches with 3 freshly-due series = %d, want 0 (Chrome stays asleep)", got)
 	}
+	// The owner's page reads this state off the snapshot, and Due-without-
+	// Checked has to be distinguishable there from a Lane that has stopped.
+	if lane := laneByName(t, p, "kagane"); !lane.Asleep || lane.Due != 3 || lane.Checked != 0 {
+		t.Fatalf("asleep kagane lane = %+v, want Asleep with 3 due and 0 checked", lane)
+	}
 	// 5 due crosses the count threshold.
 	for i := 3; i < 5; i++ {
 		seed(i)
@@ -1396,6 +1401,9 @@ func TestBrowserLaneWakeThresholds(t *testing.T) {
 	if got := browser.callCount(); got != 5 {
 		t.Fatalf("browser fetches with 5 due series = %d, want 5", got)
 	}
+	if lane := laneByName(t, p, "kagane"); lane.Asleep {
+		t.Fatalf("woken kagane lane still reports Asleep: %+v", lane)
+	}
 	// A single long-neglected series wakes the browser by age alone.
 	seedForCheck(t, s, "kagane:ancient", "https://kagane.to/series/ancient", 0)
 	p.runOnce(context.Background())
@@ -1404,6 +1412,19 @@ func TestBrowserLaneWakeThresholds(t *testing.T) {
 	}
 }
 
+// laneByName pulls one Lane out of the poller's snapshot, failing rather than
+// returning a zero LaneState a caller would assert against by accident.
+func laneByName(t *testing.T, p *Poller, site string) LaneState {
+	t.Helper()
+	for _, lane := range p.LaneStatus().Lanes {
+		if lane.Site == site {
+			return lane
+		}
+	}
+	t.Fatalf("no %q lane in the snapshot", site)
+	return LaneState{}
+}
+
 // When one browser Lane loses the sidecar, the round's remaining browser
 // Lanes are skipped: every fetch would fail anyway, and their Series must not
 // burn their stamps on a dead Chrome (issue #100).
@@ -1580,3 +1601,91 @@ func TestRunOnceClampWarningNamesTheSite(t *testing.T) {
 		t.Fatalf("clamp warning = %q, want it to name asura and 3601", got)
 	}
 }
+
+// The owner's admin page (issue #102) reads Lane state out of the poller.
+// Before any pass the snapshot is empty — a restart must render "no data
+// yet", not zeroes — and each pass records what it saw: the frozen clock,
+// the due count and the pace, with refusal backoff derived at snapshot time.
+func TestLaneStatus(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(5_000_000)
+	p := newTestPoller(t, s, &fakeFetcher{body: asuraSeriesFixture, status: 200}, now)
+
+	if st := p.LaneStatus(); len(st.Lanes) != 0 {
+		t.Fatalf("lanes before any pass = %d, want 0 (nothing has run)", len(st.Lanes))
+	} else if st.BrowserConfigured || st.BrowserReachable {
+		t.Fatalf("browser before any pass = configured=%v reachable=%v, want false without a browser fetcher", st.BrowserConfigured, st.BrowserReachable)
+	}
+
+	seedForCheck(t, s, "asura:chronicles", "https://asurascans.com/series/chronicles", 0)
+	// Two refusals put kagane's Lane into backoff; asura sits on its own Lane.
+	browser := &fakeFetcher{status: 403}
+	p.BrowserFetch = browser
+	for i := range 2 {
+		key := fmt.Sprintf("kagane:s%d", i)
+		seedForCheck(t, s, key, "https://kagane.to/series/"+key[7:], 0)
+	}
+	p.runOnce(context.Background())
+
+	st := p.LaneStatus()
+	var asura, kagane LaneState
+	for _, lane := range st.Lanes {
+		switch lane.Site {
+		case "asura":
+			asura = lane
+		case "kagane":
+			kagane = lane
+		}
+	}
+	if st.Lanes[0].Site != "asura" {
+		t.Fatalf("first lane = %q, want asura (snapshot sorted by Site)", st.Lanes[0].Site)
+	}
+	if asura.Site == "" {
+		t.Fatalf("asura missing from snapshot: %+v", st.Lanes)
+	}
+	if !asura.LastRun.Equal(now) {
+		t.Fatalf("asura LastRun = %s, want the frozen clock %s", asura.LastRun, now)
+	}
+	if asura.Due != 1 {
+		t.Fatalf("asura Due = %d, want 1", asura.Due)
+	}
+	if asura.Gap == 0 {
+		t.Fatal("asura Gap = 0, want the Lane's pace")
+	}
+	if asura.Browser || asura.Refusing {
+		t.Fatalf("asura = %+v, want a TLS Lane that is not refusing", asura)
+	}
+	if !kagane.Browser || !kagane.Refusing {
+		t.Fatalf("kagane = %+v, want a browser Lane in refusal backoff", kagane)
+	}
+	if !st.BrowserConfigured || !st.BrowserReachable {
+		t.Fatalf("browser after round = configured=%v reachable=%v, want true/true (sidecar never lost)", st.BrowserConfigured, st.BrowserReachable)
+	}
+	if asura.Checked != 1 {
+		t.Fatalf("asura Checked = %d, want the one Series it read", asura.Checked)
+	}
+
+	// A pass that declines to look (kagane is now in backoff) must not restate
+	// the figures it never gathered as zeroes: the last real pass's due count
+	// and pace stand until a pass replaces them.
+	before := kagane
+	if before.Due == 0 || before.Gap == 0 {
+		t.Fatalf("kagane after its refusing pass = %+v, want the figures that pass gathered", before)
+	}
+	p.runOnce(context.Background())
+	for _, lane := range p.LaneStatus().Lanes {
+		if lane.Site != "kagane" {
+			continue
+		}
+		if lane.Due != before.Due || lane.Gap != before.Gap {
+			t.Fatalf("kagane after a skipped pass = due %d gap %s, want the previous pass's %d / %s",
+				lane.Due, lane.Gap, before.Due, before.Gap)
+		}
+	}
+
+	// A lost sidecar reads as unreachable for the same window the Lanes skip.
+	p.setBrowserDown(now)
+	if st := p.LaneStatus(); !st.BrowserConfigured || st.BrowserReachable {
+		t.Fatalf("browser after loss = configured=%v reachable=%v, want true/false", st.BrowserConfigured, st.BrowserReachable)
+	}
+}

backend/internal/latest/sighting_test.go

@@ -0,0 +1,494 @@
+package latest
+
+import (
+	"context"
+	"crypto/sha256"
+	"fmt"
+	"log"
+	"strings"
+	"testing"
+	"time"
+
+	"bookmarkmanager/backend/internal/store"
+)
+
+// Sightings (issue #103) are specified at the Poller seam, with the store as
+// the way in: a Sighting is seeded the way handlers.Put performs one, a round
+// is run against the injected fetcher and a frozen clock, and the assertions
+// are the two observable facts — whether the Series was fetched, and what the
+// stored Latest Chapter is afterwards. Nothing here asserts counter arithmetic
+// through an internal call or reads how a deferral is represented in a row.
+
+const (
+	sightingSlug = "chronicles-of-the-demon-faction-f886a8af"
+	sightingKey  = "asura:" + sightingSlug
+	sightingURL  = "https://asurascans.com/comics/" + sightingSlug
+)
+
+// sightingFixtureLatest is the newest chapter asuraSeriesFixture publishes.
+const sightingFixtureLatest = 181.0
+
+// sight performs one Sighting exactly as the JSON API does (handlers.Put):
+// RecordSighting against the row as stored, then the Upsert that stores the
+// reported value. The order is load-bearing — the raise comparison has nothing
+// to compare against once the Upsert has landed — and the bookmark's own fields
+// are carried over untouched, which is what a userscript PUT does when it
+// echoes back the row it cached.
+func sight(t *testing.T, s *store.Store, readerID int64, key string, num float64, at time.Time) {
+	t.Helper()
+	site, seriesID, ok := strings.Cut(key, ":")
+	if !ok {
+		t.Fatalf("key %q: no ':' separator", key)
+	}
+	b, found, err := s.Get(readerID, key)
+	if err != nil || !found {
+		t.Fatalf("sight %q: get: %v found=%v", key, err, found)
+	}
+	if err := s.RecordSighting(readerID, site, seriesID, &num, at.UnixMilli()); err != nil {
+		t.Fatalf("sight %q: %v", key, err)
+	}
+	b.LatestChapter = fmt.Sprintf("Chapter %v", num)
+	b.LatestChapterNum = &num
+	b.UpdatedAt = at.UnixMilli()
+	if _, err := s.Upsert(readerID, b); err != nil {
+		t.Fatalf("sight %q: upsert: %v", key, err)
+	}
+}
+
+// secondReader is another Reader on the same database. The owner seed is the
+// only reader-creation path in this package, so a second Open as a different
+// owner is how a test gets one (as TestRunOnceFetchesSharedSeriesOnce does).
+func secondReader(t *testing.T, dbURL string) *store.Store {
+	t.Helper()
+	other, err := store.Open(dbURL,
+		store.Owner{DiscordID: "second-reader", TokenHash: sha256.Sum256([]byte("second-token-hash"))},
+		t.TempDir(), testCoverBaseURL)
+	if err != nil {
+		t.Fatalf("Open second reader: %v", err)
+	}
+	t.Cleanup(func() { other.Close() })
+	return other
+}
+
+func readLatestNum(t *testing.T, s *store.Store, readerID int64, key string) float64 {
+	t.Helper()
+	b, ok, err := s.Get(readerID, key)
+	if err != nil || !ok {
+		t.Fatalf("Get %q: %v ok=%v", key, err, ok)
+	}
+	if b.LatestChapterNum == nil {
+		t.Fatalf("%q has no latest chapter", key)
+	}
+	return *b.LatestChapterNum
+}
+
+// A Series only one Reader bookmarks is the case where being wrong can hurt
+// nobody but the Reader who reported it, so their Sighting stands in for the
+// Poll and the round leaves the Series alone.
+func TestSightingOnSolitarySeriesDefersPoll(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedForCheck(t, s, sightingKey, sightingURL, now.Add(-2*time.Hour).UnixMilli())
+	sight(t, s, s.OwnerID(), sightingKey, sightingFixtureLatest, now.Add(-10*time.Minute))
+
+	f := &fakeFetcher{body: asuraSeriesFixture, status: 200}
+	newTestPoller(t, s, f, now).runOnce(context.Background())
+
+	if got := f.callCount(); got != 0 {
+		t.Fatalf("fetched %d times after a Sighting on a solitary Series, want 0", got)
+	}
+}
+
+// On a shared Series the Sighting still writes the Latest Chapter for everyone,
+// but the Poll happens on schedule anyway — which is what corrects a wrong
+// value within the hour instead of letting it persist.
+func TestSightingOnSharedSeriesDoesNotDeferPoll(t *testing.T) {
+	s, dbURL := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedForCheck(t, s, sightingKey, sightingURL, now.Add(-2*time.Hour).UnixMilli())
+	other := secondReader(t, dbURL)
+	if _, err := s.Upsert(other.OwnerID(), store.Bookmark{
+		Key: sightingKey, Site: "asura", SeriesID: sightingSlug, UpdatedAt: 2000,
+	}); err != nil {
+		t.Fatalf("seed second reader: %v", err)
+	}
+	sight(t, s, s.OwnerID(), sightingKey, 200, now.Add(-10*time.Minute))
+
+	// The Sighting updated the shared row immediately, before any Poll.
+	if got := readLatestNum(t, s, s.OwnerID(), sightingKey); got != 200 {
+		t.Fatalf("latest after the Sighting = %v, want 200", got)
+	}
+
+	f := &fakeFetcher{body: asuraSeriesFixture, status: 200}
+	newTestPoller(t, s, f, now).runOnce(context.Background())
+
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("fetched %d times after a Sighting on a shared Series, want 1", got)
+	}
+	if got := readLatestNum(t, s, s.OwnerID(), sightingKey); got != sightingFixtureLatest {
+		t.Fatalf("latest after the Poll = %v, want the Site's own %v", got, sightingFixtureLatest)
+	}
+}
+
+// Reporting a chapter is not reading one: a Sighting may move the Latest
+// Chapter and nothing else. Both the solitary and the shared case, because the
+// deferral branch must not be where this guarantee lives.
+func TestSightingLeavesProgressAndOrderingUntouched(t *testing.T) {
+	for _, shared := range []bool{false, true} {
+		name := "solitary"
+		if shared {
+			name = "shared"
+		}
+		t.Run(name, func(t *testing.T) {
+			s, dbURL := newTestStore(t)
+			read := 5.0
+			if _, err := s.Upsert(s.OwnerID(), store.Bookmark{
+				Key: sightingKey, Site: "asura", SeriesID: sightingSlug, SeriesURL: sightingURL,
+				LastChapter: "Chapter 5", LastChapterNum: read,
+				LastChapterURL: sightingURL + "/chapter/5", UpdatedAt: 1000,
+			}); err != nil {
+				t.Fatalf("seed: %v", err)
+			}
+			if shared {
+				other := secondReader(t, dbURL)
+				if _, err := s.Upsert(other.OwnerID(), store.Bookmark{
+					Key: sightingKey, Site: "asura", SeriesID: sightingSlug, UpdatedAt: 2000,
+				}); err != nil {
+					t.Fatalf("seed second reader: %v", err)
+				}
+			}
+
+			sight(t, s, s.OwnerID(), sightingKey, 200, time.UnixMilli(9_000_000))
+
+			b, ok, err := s.Get(s.OwnerID(), sightingKey)
+			if err != nil || !ok {
+				t.Fatalf("Get: %v ok=%v", err, ok)
+			}
+			if b.LatestChapterNum == nil || *b.LatestChapterNum != 200 {
+				t.Fatalf("LatestChapterNum = %v, want 200", b.LatestChapterNum)
+			}
+			if b.LastChapterNum != read {
+				t.Fatalf("LastChapterNum = %v, want %v: a Sighting is not Progress", b.LastChapterNum, read)
+			}
+			if b.UpdatedAt != 1000 {
+				t.Fatalf("updated_at moved to %d: a Sighting must not reorder the list", b.UpdatedAt)
+			}
+		})
+	}
+}
+
+// The ceiling is what makes trusting a client report safe: however recently a
+// Series was sighted, one that has not been Polled in six hours is Polled.
+func TestSightingCeilingForcesPoll(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedForCheck(t, s, sightingKey, sightingURL, now.Add(-7*time.Hour).UnixMilli())
+	sight(t, s, s.OwnerID(), sightingKey, sightingFixtureLatest, now.Add(-time.Minute))
+
+	f := &fakeFetcher{body: asuraSeriesFixture, status: 200}
+	newTestPoller(t, s, f, now).runOnce(context.Background())
+
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("fetched %d times past the %s ceiling, want 1", got, sightingCeilingRests*defaultRest)
+	}
+}
+
+// Deferral is decided from live facts every round, so a Series that gains a
+// second Bookmark stops deferring at once — and one that loses it defers again.
+func TestDeferralFollowsTheBookmarkCount(t *testing.T) {
+	s, dbURL := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedForCheck(t, s, sightingKey, sightingURL, now.Add(-2*time.Hour).UnixMilli())
+	sight(t, s, s.OwnerID(), sightingKey, sightingFixtureLatest, now.Add(-10*time.Minute))
+
+	f := &fakeFetcher{body: asuraSeriesFixture, status: 200}
+	p := newTestPoller(t, s, f, now)
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 0 {
+		t.Fatalf("solitary Series fetched %d times, want 0", got)
+	}
+
+	other := secondReader(t, dbURL)
+	if _, err := s.Upsert(other.OwnerID(), store.Bookmark{
+		Key: sightingKey, Site: "asura", SeriesID: sightingSlug, UpdatedAt: 2000,
+	}); err != nil {
+		t.Fatalf("seed second reader: %v", err)
+	}
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("shared Series fetched %d times, want 1", got)
+	}
+
+	// The Poll above consumed the rest, so move past it before asking again.
+	if err := other.Delete(other.OwnerID(), sightingKey); err != nil {
+		t.Fatalf("delete second bookmark: %v", err)
+	}
+	later := now.Add(2 * time.Hour)
+	p.Now = func() time.Time { return later }
+	sight(t, s, s.OwnerID(), sightingKey, sightingFixtureLatest, later.Add(-time.Minute))
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("Series fetched %d times after returning to one Bookmark, want 1", got)
+	}
+}
+
+// A Series nobody reports any more returns to the normal schedule on its own:
+// the Sighting's standing lasts one rest, not forever.
+func TestDeferralExpiresWithoutFurtherSightings(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedForCheck(t, s, sightingKey, sightingURL, now.Add(-2*time.Hour).UnixMilli())
+	sight(t, s, s.OwnerID(), sightingKey, sightingFixtureLatest, now.Add(-10*time.Minute))
+
+	f := &fakeFetcher{body: asuraSeriesFixture, status: 200}
+	p := newTestPoller(t, s, f, now)
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 0 {
+		t.Fatalf("fetched %d times while the Sighting stood, want 0", got)
+	}
+
+	p.Now = func() time.Time { return now.Add(90 * time.Minute) }
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("fetched %d times once the Sighting aged out, want 1", got)
+	}
+}
+
+// demonicFixture publishes one chapter in demonicscans' live page shape, so a
+// test can make a Site publish an arbitrary number rather than the one the
+// captured fixture froze.
+func demonicFixture(num float64) string {
+	return fmt.Sprintf(
+		`<a  href="/chaptered.php?manga=11799&chapter=%v" class="chplinks" title="Catastrophic Necromancer %v">Chapter %v</a>`,
+		num, num, num)
+}
+
+const (
+	demonicKey = "demonic:Catastrophic-Necromancer"
+	demonicURL = "https://demonicscans.org/manga/Catastrophic-Necromancer"
+)
+
+// contradictOnce reports a chapter that does not exist and then runs the round
+// that catches it, returning when that round ran so a caller can chain the
+// next one. The wait is one rest and a minute: a Sighting stands in for exactly
+// one rest, so that is the first moment this solitary Series is Polled again.
+func contradictOnce(t *testing.T, s *store.Store, p *Poller, sightAt time.Time, real float64) time.Time {
+	t.Helper()
+	sight(t, s, s.OwnerID(), demonicKey, real+500, sightAt)
+	at := sightAt.Add(defaultRest + time.Minute)
+	p.Now = func() time.Time { return at }
+	p.runOnce(context.Background())
+	if got := readLatestNum(t, s, s.OwnerID(), demonicKey); got != real {
+		t.Fatalf("latest after the Poll = %v, want the Site's own %v", got, real)
+	}
+	return at
+}
+
+func seedDemonic(t *testing.T, s *store.Store, checkedAt int64) {
+	t.Helper()
+	seedForCheck(t, s, demonicKey, demonicURL, checkedAt)
+}
+
+// A Poll finding a lower number than stored means the Sighting that raised it
+// was false. The Reader is named — not the Series flagged — and both numbers are
+// logged, because that is what tells a broken adapter from a deliberate lie.
+func TestPollContradictingASightingNamesTheReaderAndBothNumbers(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedDemonic(t, s, now.Add(-2*time.Hour).UnixMilli())
+
+	var logs strings.Builder
+	prev := log.Writer()
+	log.SetOutput(&logs)
+	t.Cleanup(func() { log.SetOutput(prev) })
+
+	f := &fakeFetcher{body: demonicFixture(296), status: 200}
+	p := newTestPoller(t, s, f, now)
+	contradictOnce(t, s, p, now, 296)
+
+	got := logs.String()
+	for _, want := range []string{
+		fmt.Sprintf("reader %d", s.OwnerID()), "796", "296", demonicKey,
+	} {
+		if !strings.Contains(got, want) {
+			t.Fatalf("contradiction log = %q, want it to name %q", got, want)
+		}
+	}
+}
+
+// Three contradictions cost the Reader the right to defer. Nothing here writes
+// a counter: the marks are earned through Polls, which is the only way
+// production produces them.
+func TestThreeContradictionsStopDeferral(t *testing.T) {
+	s, _ := newTestStore(t)
+	start := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedDemonic(t, s, start.Add(-2*time.Hour).UnixMilli())
+
+	f := &fakeFetcher{body: demonicFixture(296), status: 200}
+	p := newTestPoller(t, s, f, start)
+	at := start
+	for range store.SightingDisagreementLimit {
+		at = contradictOnce(t, s, p, at.Add(time.Minute), 296)
+	}
+	fetchesSoFar := f.callCount()
+
+	// The marked Reader sights the same solitary Series again. It still writes
+	// the Latest Chapter — the penalty removes a privilege, it does not silence
+	// anyone — but the Poll is no longer postponed: the round below runs while a
+	// trusted Reader's Sighting would still be standing, and fetches anyway.
+	sight(t, s, s.OwnerID(), demonicKey, 900, at.Add(31*time.Minute))
+	if got := readLatestNum(t, s, s.OwnerID(), demonicKey); got != 900 {
+		t.Fatalf("latest after a marked Reader's Sighting = %v, want 900", got)
+	}
+	p.Now = func() time.Time { return at.Add(defaultRest + time.Minute) }
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != fetchesSoFar+1 {
+		t.Fatalf("marked Reader's Sighting still deferred the Poll (fetches %d, want %d)",
+			got, fetchesSoFar+1)
+	}
+}
+
+// The owner's remedy for a mark a broken Site adapter produced restores the
+// privilege without a wait and without SQL.
+func TestClearingMarksRestoresDeferral(t *testing.T) {
+	s, _ := newTestStore(t)
+	start := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedDemonic(t, s, start.Add(-2*time.Hour).UnixMilli())
+
+	f := &fakeFetcher{body: demonicFixture(296), status: 200}
+	p := newTestPoller(t, s, f, start)
+	at := start
+	for range store.SightingDisagreementLimit {
+		at = contradictOnce(t, s, p, at.Add(time.Minute), 296)
+	}
+	if err := s.ClearReaderMarks(s.OwnerID()); err != nil {
+		t.Fatalf("ClearReaderMarks: %v", err)
+	}
+
+	fetchesSoFar := f.callCount()
+	sight(t, s, s.OwnerID(), demonicKey, 900, at.Add(31*time.Minute))
+	p.Now = func() time.Time { return at.Add(defaultRest + time.Minute) }
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != fetchesSoFar {
+		t.Fatalf("fetched %d times after the marks were cleared, want %d: deferral must resume",
+			got, fetchesSoFar)
+	}
+}
+
+// Recovery is automatic but expensive: twenty Polls that each confirm a
+// Sighting of this Reader's clear the marks. Each round needs a new chapter,
+// because only a report that raises the stored number is attributed and so only
+// that one can be confirmed.
+func TestTwentyAgreementsClearTheMarks(t *testing.T) {
+	s, _ := newTestStore(t)
+	start := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedDemonic(t, s, start.Add(-2*time.Hour).UnixMilli())
+
+	f := &fakeFetcher{body: demonicFixture(296), status: 200}
+	p := newTestPoller(t, s, f, start)
+	at := start
+	for range store.SightingDisagreementLimit {
+		at = contradictOnce(t, s, p, at.Add(time.Minute), 296)
+	}
+
+	chapter := 296.0
+	for range store.SightingAgreementsToClear {
+		chapter++
+		sight(t, s, s.OwnerID(), demonicKey, chapter, at.Add(time.Minute))
+		f.body = demonicFixture(chapter) // the Site publishes what was reported
+		at = at.Add(defaultRest + time.Minute)
+		p.Now = func() time.Time { return at }
+		p.runOnce(context.Background())
+	}
+
+	fetchesSoFar := f.callCount()
+	chapter++
+	sight(t, s, s.OwnerID(), demonicKey, chapter, at.Add(31*time.Minute))
+	p.Now = func() time.Time { return at.Add(defaultRest + time.Minute) }
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != fetchesSoFar {
+		t.Fatalf("fetched %d times after %d confirmations, want %d: the marks must be forgiven",
+			got, store.SightingAgreementsToClear, fetchesSoFar)
+	}
+}
+
+// A Poll finding a higher number is the Site publishing since the Sighting and
+// means nothing about the Reader — no mark, and no credit either.
+func TestPollFindingHigherNumberIsNotAContradiction(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedDemonic(t, s, now.Add(-2*time.Hour).UnixMilli())
+	// Reported truthfully, then the Site published one more.
+	sight(t, s, s.OwnerID(), demonicKey, 295, now.Add(-10*time.Minute))
+
+	f := &fakeFetcher{body: demonicFixture(296), status: 200}
+	p := newTestPoller(t, s, f, now)
+	// One rest on, the Sighting has lapsed and the Poll happens.
+	p.Now = func() time.Time { return now.Add(7 * time.Hour) }
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("fetched %d times past the ceiling, want 1", got)
+	}
+
+	// Unmarked, so a fresh Sighting still defers.
+	at := now.Add(9 * time.Hour)
+	sight(t, s, s.OwnerID(), demonicKey, 296, at.Add(-time.Minute))
+	p.Now = func() time.Time { return at }
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("a Reader whose report the Site overtook lost the right to defer (fetches %d, want 1)", got)
+	}
+}
+
+// A Poll that overtakes a Sighting takes ownership of the row: the value stored
+// afterwards is the Poll's own, so a later retraction is not the Reader's fault
+// and must not be charged to them.
+func TestAttributionDoesNotSurviveAPollThatOvertookIt(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedDemonic(t, s, now.Add(-2*time.Hour).UnixMilli())
+	sight(t, s, s.OwnerID(), demonicKey, 295, now.Add(-10*time.Minute))
+
+	f := &fakeFetcher{body: demonicFixture(296), status: 200}
+	p := newTestPoller(t, s, f, now)
+	at := now.Add(defaultRest + time.Minute)
+	p.Now = func() time.Time { return at }
+	p.runOnce(context.Background())
+	if got := readLatestNum(t, s, s.OwnerID(), demonicKey); got != 296 {
+		t.Fatalf("latest after the Poll = %v, want the Site's own 296", got)
+	}
+
+	var logs strings.Builder
+	prev := log.Writer()
+	log.SetOutput(&logs)
+	t.Cleanup(func() { log.SetOutput(prev) })
+
+	f.body = demonicFixture(290) // the Site retracts what only the Poll wrote
+	p.Now = func() time.Time { return at.Add(defaultRest + time.Minute) }
+	p.runOnce(context.Background())
+	if strings.Contains(logs.String(), "sighting contradicted") {
+		t.Fatalf("a retraction of the Poll's own value was charged to a Reader: %s", logs.String())
+	}
+}
+
+// A PUT with no Latest Chapter in it — a favourite toggle, progress written
+// from a chapter page — is nobody looking at the Series page, so it buys no
+// deferral. Otherwise a client could suppress a Series' Polls while reporting
+// nothing, and with nothing reported there would be nothing to judge.
+func TestPutWithoutALatestChapterDoesNotDefer(t *testing.T) {
+	s, _ := newTestStore(t)
+	now := time.UnixMilli(20 * time.Hour.Milliseconds())
+	seedDemonic(t, s, now.Add(-2*time.Hour).UnixMilli())
+	// The handler's own call, with the field the client omitted.
+	if err := s.RecordSighting(s.OwnerID(), "demonic", "Catastrophic-Necromancer",
+		nil, now.Add(-time.Minute).UnixMilli()); err != nil {
+		t.Fatalf("RecordSighting: %v", err)
+	}
+
+	f := &fakeFetcher{body: demonicFixture(296), status: 200}
+	p := newTestPoller(t, s, f, now)
+	p.runOnce(context.Background())
+	if got := f.callCount(); got != 1 {
+		t.Fatalf("fetched %d times after a PUT carrying no chapter, want 1", got)
+	}
+}

backend/internal/latest/sites.go

@@ -409,6 +409,14 @@ const (
 	// asleep (ADR-0005 on-demand browser).
 	browserWakeCount = 5
 	browserWakeAge   = 15 * time.Minute
+	// sightingCeilingRests caps Sighting deferral (issue #103): however many
+	// Sightings arrive, a Series unpolled for this many of its Site's rests is
+	// Polled. It is what makes a client report safe to trust — a wrong Latest
+	// Chapter dies within the ceiling deterministically, rather than in
+	// expectation the way a randomised audit would have it. Six, so a Series a
+	// Reader visits constantly still gets one authoritative check per working
+	// day-part.
+	sightingCeilingRests = 6
 )
 
 // effectiveGap is a Site's pace: the registry gap, or one rest divided by the

backend/internal/latest/status.go

@@ -0,0 +1,79 @@
+package latest
+
+import "time"
+
+// LaneState is the administrative page's view of one Poll Lane (issue #102):
+// what the Lane's last pass saw. Due, Gap and Checked are filled in as the
+// pass computes them; a pass that returned before reaching a figure (refusal
+// backoff, sidecar down) carries the previous pass's figures forward rather
+// than overwriting them with zeroes the page would state as fact.
+type LaneState struct {
+	Site    string
+	Due     int
+	LastRun time.Time
+	Gap     time.Duration
+	// Checked is how many Series this pass actually read. A Lane with Series
+	// due and nothing checked has stopped working; one with nothing due is
+	// merely quiet, and the page must not draw the two the same (story 13).
+	Checked  int
+	Clamped  bool
+	Refusing bool
+	Browser  bool
+	// Asleep marks a browser Lane whose last pass declined to wake Chrome
+	// because it was under both wake thresholds (ADR-0005). Due without
+	// Checked then means "waiting for the group to gather", not "stopped", and
+	// the page must not draw it as a stall.
+	Asleep bool
+}
+
+// Status is the owner's page snapshot of the whole poller (issue #102).
+type Status struct {
+	Lanes             []LaneState
+	BrowserConfigured bool
+	BrowserReachable  bool
+}
+
+// LaneStatus returns a copy of the poller's Lane state for the owner's page.
+// Only Sites that have completed a pass appear — a restart therefore renders
+// "no data yet" instead of confident zeroes — in the same order Run iterates.
+// Refusing is derived at snapshot time from the refusal backoff, not stored,
+// so a Lane that cooled down between passes reports false without a new pass.
+// BrowserReachable mirrors the Lanes' own gate: the sidecar is down only
+// within the refuseBackoff window since its last loss.
+func (p *Poller) LaneStatus() Status {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	lanes := make([]LaneState, 0, len(p.laneStates))
+	now := p.Now()
+	for _, name := range laneNames() {
+		st, ok := p.laneStates[name]
+		if !ok {
+			continue
+		}
+		st.Refusing = now.Before(p.refuseUntil[name])
+		lanes = append(lanes, st)
+	}
+	configured := p.BrowserFetch != nil
+	reachable := configured
+	if reachable && !p.browserDownAt.IsZero() && now.Sub(p.browserDownAt) < refuseBackoff {
+		reachable = false
+	}
+	return Status{Lanes: lanes, BrowserConfigured: configured, BrowserReachable: reachable}
+}
+
+// recordLaneState stores one Lane's last pass for LaneStatus. Called deferred
+// from runLanePass so every return path records, even a pass that refused.
+// A pass that never reached the pace (Gap zero) keeps the last pass's figures:
+// the Lane's due count and gap did not become zero because this pass declined
+// to look, and the row's own marks say why it declined.
+func (p *Poller) recordLaneState(st LaneState) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	if p.laneStates == nil {
+		p.laneStates = make(map[string]LaneState)
+	}
+	if prev, ok := p.laneStates[st.Site]; ok && st.Gap == 0 {
+		st.Due, st.Gap, st.Clamped, st.Checked = prev.Due, prev.Gap, prev.Clamped, prev.Checked
+	}
+	p.laneStates[st.Site] = st
+}

backend/internal/store/migrations/0010_reader_sightings.sql

@@ -0,0 +1,6 @@
+-- The owner's administrative page (issue #102) renders these counters and
+-- offers a control to clear them, deliberately shipped before the Sighting
+-- feature (issue #103) that fills them, so a false mark never needs SQL
+-- against production. Zero counters mean a trusted Reader.
+ALTER TABLE readers ADD COLUMN sighting_agreements integer NOT NULL DEFAULT 0;
+ALTER TABLE readers ADD COLUMN sighting_disagreements integer NOT NULL DEFAULT 0;

backend/internal/store/migrations/0011_series_sightings.sql

@@ -0,0 +1,10 @@
+-- Sighting deferral (issue #103). latest_sighted_at is when a Reader's report
+-- last stood in for a Poll; it is separate from latest_checked_at because the
+-- six-hour ceiling has to know when the Series was last really fetched, and a
+-- Sighting writing the Poll's own column would erase that.
+-- latest_raised_by is attribution: whoever last raised this Series' Latest
+-- Chapter by Sighting, so a Poll that contradicts the value downwards names a
+-- Reader rather than flagging a row. Cleared by the Poll that judges it, NULL
+-- whenever the stored value is the Poll's own.
+ALTER TABLE series ADD COLUMN latest_sighted_at bigint NOT NULL DEFAULT 0;
+ALTER TABLE series ADD COLUMN latest_raised_by bigint REFERENCES readers(id) ON DELETE SET NULL;

backend/internal/store/store.go

@@ -79,6 +79,11 @@ type Series struct {
 	LatestChapter    string
 	LatestChapterNum *float64 // nil until first captured
 	LatestCheckedAt  int64    // unix ms; see MarkLatestChecked
+	// LatestRaisedBy is the Reader whose Sighting last raised LatestChapter,
+	// and nil when the stored value is a Poll's own finding. It is what lets a
+	// Poll that contradicts the value downwards name a Reader instead of
+	// merely flagging the row (issue #103); the Poll that judges it clears it.
+	LatestRaisedBy *int64
 
 	// readerCount is the number of bookmarks referencing this series, filled
 	// only by the due-queue query that orders on it.
@@ -195,7 +200,7 @@ const bookmarkColumns = `b.site, b.series_id, s.title, s.series_url, s.cover_add
 // due query. latest_checked_at lives only on series — see MarkLatestChecked
 // for why it stays off every client-visible write.
 const seriesColumns = `s.site, s.series_id, s.title, s.series_url, s.cover, s.cover_address,
-	s.kind, s.latest_chapter, s.latest_chapter_num, s.latest_checked_at`
+	s.kind, s.latest_chapter, s.latest_chapter_num, s.latest_checked_at, s.latest_raised_by`
 
 // Owner is the person running the service: the first Reader, seeded at startup
 // so a fresh deployment has a library before anyone logs in. The seed makes
@@ -315,25 +320,42 @@ func (s *Store) EnsureReader(discordID string, epochZeroHash [32]byte) (int64, e
 	return id, nil
 }
 
+// SightingDisagreementLimit is the number of contradictions that stop that
+// Reader's Sightings from deferring a Poll (issue #103). The counters exist
+// before the mechanism that moves them, so the admin page (issue #102) can
+// clear a false mark without waiting for the Sighting feature.
+const SightingDisagreementLimit = 3
+
+// Blocked reports whether this Reader's Sighting marks have reached the
+// disagreement limit, which stops their Sightings from deferring a Poll.
+func (r ReaderSummary) Blocked() bool {
+	return r.Disagreements >= SightingDisagreementLimit
+}
+
 // ReaderSummary is one Reader as the owner's administration panel sees them:
-// who they are and how many live sessions they hold. No credential material,
-// hashed or otherwise, is exposed.
+// who they are, how many live sessions they hold, and their Sighting marks.
+// No credential material, hashed or otherwise, is exposed.
 type ReaderSummary struct {
 	ID        int64
 	DiscordID string
 	// Sessions counts unexpired session rows — what the owner revokes.
 	Sessions int
+	// Agreements and Disagreements are the Sighting counters (issue #102);
+	// zero means a trusted Reader.
+	Agreements    int
+	Disagreements int
 }
 
-// Readers lists every Reader with their live session count, oldest first, so
-// the owner row (always the oldest) heads the list.
+// Readers lists every Reader with their live session count and Sighting
+// marks, oldest first, so the owner row (always the oldest) heads the list.
 func (s *Store) Readers() ([]ReaderSummary, error) {
 	rows, err := s.db.Query(`
 		SELECT r.id, r.discord_id,
+		       r.sighting_agreements, r.sighting_disagreements,
 		       count(sess.id) FILTER (WHERE sess.expires_at > now()) AS sessions
 		FROM readers r
 		LEFT JOIN sessions sess ON sess.reader_id = r.id
-		GROUP BY r.id, r.discord_id
+		GROUP BY r.id, r.discord_id, r.sighting_agreements, r.sighting_disagreements
 		ORDER BY r.id`)
 	if err != nil {
 		return nil, fmt.Errorf("query readers: %w", err)
@@ -343,7 +365,7 @@ func (s *Store) Readers() ([]ReaderSummary, error) {
 	out := []ReaderSummary{}
 	for rows.Next() {
 		var r ReaderSummary
-		if err := rows.Scan(&r.ID, &r.DiscordID, &r.Sessions); err != nil {
+		if err := rows.Scan(&r.ID, &r.DiscordID, &r.Agreements, &r.Disagreements, &r.Sessions); err != nil {
 			return nil, fmt.Errorf("scan reader: %w", err)
 		}
 		out = append(out, r)
@@ -351,6 +373,18 @@ func (s *Store) Readers() ([]ReaderSummary, error) {
 	return out, rows.Err()
 }
 
+// ClearReaderMarks zeroes a Reader's Sighting counters. It is the owner's
+// remedy for a mark produced by a broken Site adapter rather than a dishonest
+// Reader: it restores a privilege, it is not destruction.
+func (s *Store) ClearReaderMarks(readerID int64) error {
+	if _, err := s.db.Exec(`
+		UPDATE readers SET sighting_agreements = 0, sighting_disagreements = 0
+		WHERE id = $1`, readerID); err != nil {
+		return fmt.Errorf("clear reader marks for reader %d: %w", readerID, err)
+	}
+	return nil
+}
+
 // readersMigration is the version that creates the readers table. The owner
 // seed runs between two migrate passes, so that the run-once migration which
 // attaches existing bookmarks (0004) finds the owner row.
@@ -555,16 +589,17 @@ func (s *Store) scanBookmark(scan func(...any) error) (Bookmark, error) {
 }
 
 // scanSeries reads one row in seriesColumns order, plus the due query's
-// reader_count column. latest_chapter_num is NULL until the first capture,
-// same as on the bookmark read path.
+// reader_count column. latest_chapter_num and latest_raised_by are both
+// nullable, same as latest_chapter_num on the bookmark read path.
 func scanSeries(scan func(...any) error) (Series, error) {
 	var (
 		sr               Series
 		latestChapterNum sql.NullFloat64
+		latestRaisedBy   sql.NullInt64
 	)
 	if err := scan(
 		&sr.Site, &sr.SeriesID, &sr.Title, &sr.SeriesURL, &sr.Cover, &sr.CoverAddress,
-		&sr.Kind, &sr.LatestChapter, &latestChapterNum, &sr.LatestCheckedAt,
+		&sr.Kind, &sr.LatestChapter, &latestChapterNum, &sr.LatestCheckedAt, &latestRaisedBy,
 		&sr.readerCount,
 	); err != nil {
 		return Series{}, err
@@ -572,6 +607,9 @@ func scanSeries(scan func(...any) error) (Series, error) {
 	if latestChapterNum.Valid {
 		sr.LatestChapterNum = &latestChapterNum.Float64
 	}
+	if latestRaisedBy.Valid {
+		sr.LatestRaisedBy = &latestRaisedBy.Int64
+	}
 	return sr, nil
 }
 
@@ -918,7 +956,20 @@ func (s *Store) Delete(readerID int64, key string) error {
 // burns requests. Archived bookmarks still count — knowing what a shelved
 // series is up to is the whole reason for archiving instead of deleting.
 // A series with no bookmarks at all never appears: the join excludes it.
-func (s *Store) DueForLatestCheck(site string, cutoffMs int64) ([]Series, error) {
+//
+// ceilingMs is the Sighting deferral ceiling (issue #103): a Series whose last
+// real Poll is older than it appears however recently it was sighted. That is
+// what bounds the whole mechanism — a wrong Latest Chapter dies within the
+// ceiling deterministically rather than in expectation. Deferral itself is
+// decided here, from two facts the query already computes, so a Lane gains no
+// query per round: a Sighting younger than cutoffMs holds the Series back, but
+// only while COUNT(*) is 1. A Series a second Reader bookmarks is Polled on
+// schedule, so a wrong value the whole guild can see is corrected by a check
+// that was never postponed; on a solitary Series the only person a wrong value
+// reaches is the Reader who reported it. Whether the reporting Reader is
+// allowed to defer at all was settled when the Sighting was recorded — see
+// RecordSighting.
+func (s *Store) DueForLatestCheck(site string, cutoffMs, ceilingMs int64) ([]Series, error) {
 	rows, err := s.db.Query(`SELECT `+seriesColumns+`, COUNT(*) AS reader_count
 		FROM series s
 		JOIN bookmarks b ON b.site = s.site AND b.series_id = s.series_id
@@ -928,7 +979,10 @@ func (s *Store) DueForLatestCheck(site string, cutoffMs int64) ([]Series, error)
 		GROUP BY s.site, s.series_id, s.title, s.series_url, s.cover,
 		         s.kind, s.latest_chapter, s.latest_chapter_num, s.latest_checked_at
 		HAVING COUNT(*) FILTER (WHERE b.status <> 'finished') > 0
-		ORDER BY reader_count DESC, s.latest_checked_at ASC`, site, cutoffMs)
+		   AND (COUNT(*) > 1
+		        OR s.latest_sighted_at <= $2::bigint
+		        OR s.latest_checked_at <= $3::bigint)
+		ORDER BY reader_count DESC, s.latest_checked_at ASC`, site, cutoffMs, ceilingMs)
 	if err != nil {
 		return nil, fmt.Errorf("query due series: %w", err)
 	}
@@ -1015,3 +1069,111 @@ func (s *Store) SetLatestChapter(site, seriesID, label string, num float64) erro
 	}
 	return nil
 }
+
+// RecordSighting notes that a Reader's browser reported this Series' Latest
+// Chapter, which is the half of a Sighting the client body cannot express
+// (issue #103). It must be called *before* the Upsert that stores the reported
+// value: the raise test compares against what is still on the row, and after
+// the Upsert there is nothing left to compare with. A Series that does not
+// exist yet — the first Bookmark of it — is not a Sighting at all: nothing has
+// ever been Polled, so there is nothing to defer and nobody to attribute.
+//
+// Two independent effects, hence the two CASE arms. The deferral stamp is only
+// written for a Reader below the disagreement limit, so a marked Reader's
+// reports keep updating the Latest Chapter but stop postponing anything, and
+// clearing their marks restores the privilege on their next Sighting. The
+// attribution is written whenever the report raises the stored number,
+// including for a marked Reader — their Sightings are still judged, which is
+// how they earn the privilege back.
+//
+// num is the reported chapter number. A PUT that carries none — a favourite
+// toggle, or progress written from a chapter page — is no Sighting at all:
+// nobody read the Series page, so there is nothing to stand in for a Poll and
+// nothing that could later be judged.
+func (s *Store) RecordSighting(readerID int64, site, seriesID string, num *float64, ts int64) error {
+	if num == nil {
+		return nil
+	}
+	if _, err := s.db.Exec(`
+		UPDATE series SET
+		  latest_sighted_at = CASE
+		    WHEN (SELECT sighting_disagreements FROM readers WHERE id = $3) < $6
+		    THEN $4::bigint ELSE latest_sighted_at END,
+		  latest_raised_by = CASE
+		    WHEN latest_chapter_num IS NULL OR $5::double precision > latest_chapter_num
+		    THEN $3::bigint ELSE latest_raised_by END
+		WHERE site = $1 AND series_id = $2`,
+		site, seriesID, readerID, ts, *num, SightingDisagreementLimit); err != nil {
+		return fmt.Errorf("record sighting %s:%s: %w", site, seriesID, err)
+	}
+	return nil
+}
+
+// SightingAgreementsToClear is how many Polls must confirm a Reader's
+// Sightings in a row before their disagreements are forgiven. An agreement is
+// only recorded when a Poll later confirms a Sighting, so this is twenty Polls
+// of Series that Reader bookmarks — hours to days, not twenty page views. That
+// is the intended price: recovery is automatic but cannot be outwaited, and a
+// disagreement resets the run to zero, so credit cannot be banked in advance.
+const SightingAgreementsToClear = 20
+
+// RecordSightingOutcome settles what a Poll decided about the Reader whose
+// Sighting last raised this Series' Latest Chapter, and clears the attribution
+// in the same transaction so one Sighting is judged exactly once. agreed is
+// the Poll confirming the stored value; its opposite is the Poll finding a
+// lower number, which means the raise was false.
+//
+// A Poll finding a *higher* number is neither — the Site published — and takes
+// ClearSightingAttribution instead.
+func (s *Store) RecordSightingOutcome(site, seriesID string, readerID int64, agreed bool) error {
+	tx, err := s.db.Begin()
+	if err != nil {
+		return fmt.Errorf("begin sighting outcome %s:%s: %w", site, seriesID, err)
+	}
+	defer tx.Rollback()
+
+	// The run length is what "consecutive" means: a disagreement zeroes the
+	// agreements, and completing a run zeroes both, so the next run starts
+	// from nothing rather than forgiving every later disagreement instantly.
+	q := `UPDATE readers SET sighting_disagreements = sighting_disagreements + 1,
+	                         sighting_agreements = 0
+	      WHERE id = $1`
+	args := []any{readerID}
+	if agreed {
+		q = `UPDATE readers SET
+		       sighting_agreements = CASE WHEN sighting_agreements + 1 >= $2 THEN 0
+		                                  ELSE sighting_agreements + 1 END,
+		       sighting_disagreements = CASE WHEN sighting_agreements + 1 >= $2 THEN 0
+		                                     ELSE sighting_disagreements END
+		     WHERE id = $1`
+		args = append(args, SightingAgreementsToClear)
+	}
+	if _, err := tx.Exec(q, args...); err != nil {
+		return fmt.Errorf("record sighting outcome for reader %d: %w", readerID, err)
+	}
+	if _, err := tx.Exec(clearAttributionSQL, site, seriesID, readerID); err != nil {
+		return fmt.Errorf("clear sighting attribution %s:%s: %w", site, seriesID, err)
+	}
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("commit sighting outcome %s:%s: %w", site, seriesID, err)
+	}
+	return nil
+}
+
+// ClearSightingAttribution answers a Sighting without judging it: the Poll
+// found a higher number, so the value about to be stored is its own and this
+// Reader is no longer answerable for the row. Without it the next Poll's
+// agreement would be credited to a Reader who did not earn it.
+func (s *Store) ClearSightingAttribution(site, seriesID string, readerID int64) error {
+	if _, err := s.db.Exec(clearAttributionSQL, site, seriesID, readerID); err != nil {
+		return fmt.Errorf("clear sighting attribution %s:%s: %w", site, seriesID, err)
+	}
+	return nil
+}
+
+// clearAttributionSQL drops the attribution only while it still names the
+// Reader being judged: a Sighting landing between the due query's snapshot and
+// this write is a fresh, unjudged one and must not be erased by the previous
+// one's verdict.
+const clearAttributionSQL = `UPDATE series SET latest_raised_by = NULL
+	WHERE site = $1 AND series_id = $2 AND latest_raised_by = $3`

backend/internal/store/store_test.go

@@ -277,6 +277,10 @@ func seedForCheck(t *testing.T, s *Store, key, seriesURL string, checkedAt int64
 	}
 }
 
+// noCeiling is a Sighting deferral ceiling no Series can reach, for the tests
+// that predate the ceiling and are about rest, ordering or buckets instead.
+const noCeiling = int64(-1)
+
 func TestDueForLatestCheck(t *testing.T) {
 	const hour = int64(3600_000)
 	now := 10 * hour
@@ -298,7 +302,7 @@ func TestDueForLatestCheck(t *testing.T) {
 			s := newTestStore(t)
 			seedForCheck(t, s, "asura:x", tt.seriesURL, tt.checkedAt)
 
-			due, err := s.DueForLatestCheck("asura", now-hour)
+			due, err := s.DueForLatestCheck("asura", now-hour, noCeiling)
 			if err != nil {
 				t.Fatalf("DueForLatestCheck: %v", err)
 			}
@@ -319,7 +323,7 @@ func TestDueForLatestCheckOldestFirstAndScopedToSite(t *testing.T) {
 	// asks for one Site, and no Lane may see another's queue.
 	seedForCheck(t, s, "demonic:z", "https://demonicscans.org/manga/z", 0)
 
-	due, err := s.DueForLatestCheck("asura", 1000)
+	due, err := s.DueForLatestCheck("asura", 1000, noCeiling)
 	if err != nil {
 		t.Fatalf("DueForLatestCheck: %v", err)
 	}
@@ -499,7 +503,7 @@ func TestDueForLatestCheckSkipsFinishedKeepsArchived(t *testing.T) {
 		}
 	}
 
-	due, err := store.DueForLatestCheck("asura", time.Now().UnixMilli())
+	due, err := store.DueForLatestCheck("asura", time.Now().UnixMilli(), noCeiling)
 	if err != nil {
 		t.Fatalf("DueForLatestCheck: %v", err)
 	}
@@ -1005,7 +1009,7 @@ func TestDueForLatestCheckOrdersByReaderCountThenAge(t *testing.T) {
 	seedSecondReader(t, s, "asura:pop:2", "asura", "pop", 1001)
 	seedForCheck(t, s, "asura:solo", "https://asurascans.com/comics/solo", 100)
 
-	due, err := s.DueForLatestCheck("asura", 1000)
+	due, err := s.DueForLatestCheck("asura", 1000, noCeiling)
 	if err != nil {
 		t.Fatalf("DueForLatestCheck: %v", err)
 	}
@@ -1031,7 +1035,7 @@ func TestDueForLatestCheckExcludesOrphanSeries(t *testing.T) {
 		t.Fatalf("seed orphan series: %v", err)
 	}
 
-	due, err := s.DueForLatestCheck("asura", 1000)
+	due, err := s.DueForLatestCheck("asura", 1000, noCeiling)
 	if err != nil {
 		t.Fatalf("DueForLatestCheck: %v", err)
 	}
@@ -1334,6 +1338,86 @@ func TestReadersAndSessionRevocation(t *testing.T) {
 	}
 }
 
+// The Sighting counters ship before the mechanism that fills them (issue
+// #102 before #103), so the admin page depends on their default: a fresh
+// Reader reads back trusted. Marking one directly proves Readers() reports
+// the counters and Blocked() flips at the limit, and that ClearReaderMarks —
+// the owner's remedy for a false mark — zeroes them again.
+func TestReaderSightingMarks(t *testing.T) {
+	s := newTestStore(t)
+	other := secondReader(t, s)
+
+	readers, err := s.Readers()
+	if err != nil {
+		t.Fatalf("Readers: %v", err)
+	}
+	if len(readers) != 2 {
+		t.Fatalf("readers = %d, want the owner and the second Reader", len(readers))
+	}
+	for _, r := range readers {
+		if r.Agreements != 0 || r.Disagreements != 0 || r.Blocked() {
+			t.Fatalf("fresh reader %d has marks: %+v", r.ID, r)
+		}
+	}
+
+	// The counters' default is the trusted state; writing them directly is
+	// the only way to exercise the read path until issue #103 moves them.
+	if _, err := s.db.Exec(`
+		UPDATE readers SET sighting_agreements = 5, sighting_disagreements = 2
+		WHERE id = $1`, other); err != nil {
+		t.Fatalf("mark reader: %v", err)
+	}
+	readers, err = s.Readers()
+	if err != nil {
+		t.Fatalf("Readers: %v", err)
+	}
+	var marked *ReaderSummary
+	for i := range readers {
+		if readers[i].ID == other {
+			marked = &readers[i]
+		}
+	}
+	if marked == nil || marked.Agreements != 5 || marked.Disagreements != 2 {
+		t.Fatalf("marked reader = %+v, want agreements 5, disagreements 2", marked)
+	}
+	if marked.Blocked() {
+		t.Fatalf("reader with 2 disagreements is blocked; limit is %d", SightingDisagreementLimit)
+	}
+
+	if _, err := s.db.Exec(`
+		UPDATE readers SET sighting_disagreements = 3 WHERE id = $1`, other); err != nil {
+		t.Fatalf("block reader: %v", err)
+	}
+	readers, err = s.Readers()
+	if err != nil {
+		t.Fatalf("Readers: %v", err)
+	}
+	for _, r := range readers {
+		if r.ID == other && !r.Blocked() {
+			t.Fatalf("reader at the disagreement limit is not blocked: %+v", r)
+		}
+		if r.ID == s.OwnerID() && r.Blocked() {
+			t.Fatalf("untouched owner became blocked: %+v", r)
+		}
+	}
+
+	if err := s.ClearReaderMarks(other); err != nil {
+		t.Fatalf("ClearReaderMarks: %v", err)
+	}
+	if err := s.ClearReaderMarks(other + 9999); err != nil {
+		t.Fatalf("ClearReaderMarks(unknown id): %v", err)
+	}
+	readers, err = s.Readers()
+	if err != nil {
+		t.Fatalf("Readers: %v", err)
+	}
+	for _, r := range readers {
+		if r.Agreements != 0 || r.Disagreements != 0 || r.Blocked() {
+			t.Fatalf("reader %d not cleared: %+v", r.ID, r)
+		}
+	}
+}
+
 // Two Readers on one Series: one series row, two independent progresses. The
 // second Reader starts at zero however far the first has read, and the shared
 // row is still due exactly once.
@@ -1369,7 +1453,7 @@ func TestTwoReadersShareOneSeriesWithIndependentProgress(t *testing.T) {
 		t.Fatalf("series rows = %d, want 1 shared row for two bookmarks", series)
 	}
 
-	due, err := s.DueForLatestCheck("asura", time.Now().UnixMilli())
+	due, err := s.DueForLatestCheck("asura", time.Now().UnixMilli(), noCeiling)
 	if err != nil {
 		t.Fatalf("DueForLatestCheck: %v", err)
 	}
@@ -1385,7 +1469,7 @@ func TestTwoReadersShareOneSeriesWithIndependentProgress(t *testing.T) {
 	if b, ok, err := s.Get(s.OwnerID(), "asura:solo"); err != nil || !ok || b.LastChapterNum != 200 {
 		t.Fatalf("owner's bookmark after the other's delete = %+v ok=%v err=%v, want it intact", b, ok, err)
 	}
-	due, err = s.DueForLatestCheck("asura", time.Now().UnixMilli())
+	due, err = s.DueForLatestCheck("asura", time.Now().UnixMilli(), noCeiling)
 	if err != nil {
 		t.Fatalf("DueForLatestCheck after delete: %v", err)
 	}

backend/internal/web/admin.go

@@ -0,0 +1,256 @@
+package web
+
+import (
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+
+	"bookmarkmanager/backend/internal/latest"
+	"bookmarkmanager/backend/internal/store"
+)
+
+// LaneReporter is the administrative page's whole window onto the running
+// poller: one snapshot of Poll Lane state, copied out of memory on request.
+// The Poller satisfies it in production and a fake with fixed values satisfies
+// it in tests, so the page's tests need neither a poller nor a Site.
+type LaneReporter interface {
+	LaneStatus() latest.Status
+}
+
+// adminView is what the administrative page and the roster fragment receive.
+type adminView struct {
+	Readers []store.ReaderSummary
+	// OwnerID travels with the roster so it can tell the owner's own row from
+	// the Readers they may act on.
+	OwnerID int64
+	Lanes   lanesView
+}
+
+// lanesView is the Lane status block: one row per Site that has run, plus the
+// browser fact, which is shared by the three browser Sites rather than held
+// once per Site.
+type lanesView struct {
+	Rows []laneRow
+	// PollerOff means no poller is running at all (disabled by config, or its
+	// client could not be built). The browser line must not answer "not
+	// configured" then: the sidecar is not the reason nothing is polled.
+	PollerOff         bool
+	BrowserConfigured bool
+	BrowserReachable  bool
+}
+
+// laneRow is one Lane formatted for reading rather than for arithmetic: the
+// template renders strings and flags, and every judgement about what they mean
+// is made here.
+type laneRow struct {
+	Site string
+	Due  int
+	Ran  string
+	// Checked is how many Series the last pass read. Due without Checked is a
+	// Lane that has stopped working; the two figures side by side are what
+	// separate that from a Lane with nothing to do.
+	Checked int
+	// Gap is empty when no pass has reached the pace yet, so the row omits the
+	// figure instead of stating a zero.
+	Gap      string
+	Clamped  bool
+	Refusing bool
+	// BrowserLost marks a Lane whose pages can only be read through the
+	// sidecar while the sidecar is unreachable — including the case where none
+	// is configured, which stops those Series just as completely.
+	BrowserLost bool
+	// Stalled marks a Lane with Series waiting that its last pass did not read
+	// — the difference between a stopped Lane and a quiet one (story 13). A
+	// browser Lane holding Chrome asleep under the wake thresholds is neither,
+	// so it carries Asleep instead and never Stalled.
+	Stalled bool
+	Asleep  bool
+	// Attention is the one flag the template colours on, so an unhealthy Lane
+	// is found at a glance rather than read for.
+	Attention bool
+}
+
+// adminRoute pairs a route pattern with its handler so the route list and the
+// gate cannot drift apart.
+type adminRoute struct {
+	pattern string
+	handler http.HandlerFunc
+}
+
+// adminRoutes is every route that reaches past the acting Reader. Register
+// wraps each one in requireOwner, so a new administrative route is gated by
+// being listed here rather than by remembering to write a check inside it.
+func (h *Handler) adminRoutes() []adminRoute {
+	return []adminRoute{
+		{"GET /admin", h.admin},
+		{"GET /ui/admin/lanes", h.uiLanes},
+		{"POST /readers/{id}/revoke", h.revokeReaderSessions},
+		{"POST /readers/{id}/clear-marks", h.clearReaderMarks},
+	}
+}
+
+// AdminPatterns names every administrative route, so one test can prove the
+// owner gate covers all of them rather than one test per route. The receiver is
+// nil because only the patterns are read; the bound handlers are never called.
+func AdminPatterns() []string {
+	routes := (*Handler)(nil).adminRoutes()
+	out := make([]string, 0, len(routes))
+	for _, rt := range routes {
+		out = append(out, rt.pattern)
+	}
+	return out
+}
+
+// requireOwner is the owner test, in one place, layered on the session gate: no
+// session is still 401, and a signed-in Reader who is not the owner gets 404
+// rather than 403 — a refusal that confirms the address exists is a refusal
+// that helps whoever is probing for it.
+func (h *Handler) requireOwner(next http.HandlerFunc) http.HandlerFunc {
+	return h.requireSession(func(w http.ResponseWriter, r *http.Request) {
+		if readerOf(r) != h.store.OwnerID() {
+			http.NotFound(w, r)
+			return
+		}
+		next(w, r)
+	})
+}
+
+// admin renders the owner's page: the Reader roster and Poll Lane status.
+func (h *Handler) admin(w http.ResponseWriter, r *http.Request) {
+	readers, err := h.store.Readers()
+	if err != nil {
+		log.Printf("admin: %v", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	h.render(w, http.StatusOK, "admin", adminView{
+		Readers: readers,
+		OwnerID: h.store.OwnerID(),
+		Lanes:   h.lanesView(),
+	})
+}
+
+// uiLanes answers the status block's own refresh. Only the block refreshes on a
+// timer; the roster re-renders after an action, as it always has.
+func (h *Handler) uiLanes(w http.ResponseWriter, r *http.Request) {
+	h.render(w, http.StatusOK, "lanes", h.lanesView())
+}
+
+// lanesView copies the poller's snapshot into display form. A nil reporter (no
+// poller running) and a poller no Lane has reported to yet are the same thing
+// to the page: no data, which it must say rather than draw as confident zeroes
+// — an empty page a few seconds after a restart must not read as a stopped one.
+func (h *Handler) lanesView() lanesView {
+	if h.lanes == nil {
+		return lanesView{PollerOff: true}
+	}
+	snap := h.lanes.LaneStatus()
+	v := lanesView{
+		Rows:              make([]laneRow, 0, len(snap.Lanes)),
+		BrowserConfigured: snap.BrowserConfigured,
+		BrowserReachable:  snap.BrowserReachable,
+	}
+	now := time.Now()
+	for _, l := range snap.Lanes {
+		lost := l.Browser && !snap.BrowserReachable
+		// Series waiting and none read is the shape of a Lane that has stopped
+		// working, as distinct from one that is quiet for want of work — or one
+		// deliberately leaving Chrome asleep until its group gathers.
+		stalled := l.Due > 0 && l.Checked == 0 && !l.Asleep
+		gap := ""
+		if l.Gap > 0 {
+			gap = l.Gap.Truncate(time.Second).String()
+		}
+		v.Rows = append(v.Rows, laneRow{
+			Site:        l.Site,
+			Due:         l.Due,
+			Ran:         since(now, l.LastRun),
+			Checked:     l.Checked,
+			Gap:         gap,
+			Clamped:     l.Clamped,
+			Refusing:    l.Refusing,
+			BrowserLost: lost,
+			Stalled:     stalled,
+			Asleep:      l.Asleep,
+			Attention:   l.Clamped || l.Refusing || lost || stalled,
+		})
+	}
+	return v
+}
+
+// since formats how long ago a Lane last ran, at second resolution: the block
+// refreshes every thirty seconds, so anything finer is noise the owner would
+// have to ignore.
+func since(now, then time.Time) string {
+	d := now.Sub(then).Truncate(time.Second)
+	if d < time.Second {
+		return "just now"
+	}
+	return d.String() + " ago"
+}
+
+// revokeReaderSessions logs one Reader out of every browser they are signed in
+// on. The owner gate is the route's, not this handler's.
+func (h *Handler) revokeReaderSessions(w http.ResponseWriter, r *http.Request) {
+	target, ok := readerPathID(w, r)
+	if !ok {
+		return
+	}
+	// The owner is not one of the Readers this endpoint reaches: revoking
+	// themselves would sign out the browser making the request, which is what
+	// logout is for. The roster hides the button; this refuses the hand-rolled
+	// POST behind it.
+	if target == h.store.OwnerID() {
+		http.NotFound(w, r)
+		return
+	}
+	if err := h.store.DeleteReaderSessions(target); err != nil {
+		log.Printf("revoke sessions: %v", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	h.renderRoster(w, "revoke sessions")
+}
+
+// clearReaderMarks zeroes one Reader's Sighting counters. The guard those
+// counters feed has one known false positive — a Site changing its page shape
+// makes a correct adapter read a wrong high number and marks every honest
+// Reader of that Site at once (issue #103) — and this is its remedy. It
+// restores a privilege rather than destroying anything, so the control is
+// confirmed but never wears the destruction accent.
+func (h *Handler) clearReaderMarks(w http.ResponseWriter, r *http.Request) {
+	target, ok := readerPathID(w, r)
+	if !ok {
+		return
+	}
+	if err := h.store.ClearReaderMarks(target); err != nil {
+		log.Printf("clear marks: %v", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	h.renderRoster(w, "clear marks")
+}
+
+// readerPathID reads the Reader a route names, answering the request itself
+// when there is nobody to act on.
+func readerPathID(w http.ResponseWriter, r *http.Request) (int64, bool) {
+	id, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
+	if err != nil {
+		http.Error(w, "bad reader id", http.StatusBadRequest)
+		return 0, false
+	}
+	return id, true
+}
+
+// renderRoster answers an action with the whole roster, so the counts and marks
+// it shows cannot describe the state before the tap.
+func (h *Handler) renderRoster(w http.ResponseWriter, what string) {
+	readers, err := h.store.Readers()
+	if err != nil {
+		log.Printf("%s: %v", what, err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	h.render(w, http.StatusOK, "readers", adminView{Readers: readers, OwnerID: h.store.OwnerID()})
+}

backend/internal/web/static/style.css

@@ -87,6 +87,11 @@
   --moss: #7fae86;         /* finished */
   --clay: #b5906f;         /* set chapter */
   --trash: #977671;        /* remove, resting — icons need 3:1, not 4.5:1 */
+  /* A Lane needing attention: the admin page's only accent. Verdigris — cool,
+     the far side of the wheel from ember's crimson, and clear of the archive
+     blue. Neither ember (new chapter) nor danger (destruction) may say
+     "system unhealthy". */
+  --patina: #5fb3a6;
 
   /* Desktop cell borders for the two coloured action states. */
   --play-hot-line: #3a1d18;
@@ -146,6 +151,7 @@
     --moss: #3d6c46;
     --clay: #7c5533;
     --trash: #8c6558;
+    --patina: #1f6f66;
 
     --play-hot-line: #f0cfc6;
     --fav-line: #e3d3a4;
@@ -290,9 +296,21 @@ button { cursor: pointer; }
   letter-spacing: .04em;
 }
 
-/* ---- reader roster (owner only): same hairline panel, one row per Reader ---- */
-.readerlist { margin: 0; padding: 0; list-style: none; }
-.readerlist li {
+/* ---- admin page: two sections on the same measured sheet, no cards ----
+   The reading page is a list of series; this is a list of facts. Both are
+   sheets of hairline-separated rows, so the roster keeps the shape it had as
+   a fold-out and the Lane block copies it. */
+.readers, .lanes { margin: 0 20px; padding: 12px 0 16px; border-bottom: 1px solid var(--rule); }
+.readers h2, .lanes h2 {
+  margin: 0;
+  padding: 8px 0;
+  font: 500 10px/1 var(--font-mono);
+  letter-spacing: .2em;
+  text-transform: uppercase;
+  color: var(--mute-2);
+}
+.readerlist, .lanelist { margin: 0; padding: 0; list-style: none; }
+.readerlist li, .lanelist li {
   display: flex;
   align-items: center;
   flex-wrap: wrap;
@@ -300,7 +318,8 @@ button { cursor: pointer; }
   min-height: 44px;
   border-top: 1px solid var(--rule);
 }
-.readerlist form { margin: 0 0 0 auto; }
+.reader-actions { display: flex; gap: 18px; margin-left: auto; }
+.readerlist form { margin: 0; }
 .reader-id {
   font: 500 13px/1.4 var(--font-mono);
   letter-spacing: .04em;
@@ -312,6 +331,30 @@ button { cursor: pointer; }
   text-transform: uppercase;
   color: var(--mute);
 }
+.reader-sightings, .lane-fact {
+  font: 500 10px/1 var(--font-mono);
+  letter-spacing: .14em;
+  text-transform: uppercase;
+  color: var(--mute-2);
+}
+/* Two states the owner is meant to find rather than read for: a Reader whose
+   reports no longer defer a Poll, and a Lane that is not keeping its promise.
+   Both wear --patina — never ember, which means one thing, and never danger,
+   which is destruction. */
+.reader-blocked, .lane-mark {
+  font: 500 10px/1 var(--font-mono);
+  letter-spacing: .14em;
+  text-transform: uppercase;
+  color: var(--patina);
+}
+.lane-site {
+  font: 400 19px/1.2 var(--font-display);
+  color: var(--paper-dim);
+}
+/* The whole row leans patina when the Lane needs attention, so the scan is one
+   pass down the left edge rather than a read of every mark. */
+.lanelist li.attention .lane-site { color: var(--patina); }
+.lane-browser { padding: 12px 0 0; }
 /* Revocation cuts someone off, so it wears --danger. Ember stays reserved for
    the new-chapter signal. */
 .ghost.danger { color: var(--danger); }
@@ -600,6 +643,9 @@ button { cursor: pointer; }
   box-shadow: inset 0 -2px 0 var(--ember);
 }
 .topbar form { margin-left: 18px; }
+/* The admin page's topbar has no switch to fill the middle, so its back link
+   keeps company with Log out at the right edge instead of floating centre. */
+.topbar .back { margin-left: auto; }
 /* At phone width brand + switch + Log out do not fit on one line, so the
    switch takes its own row under the wordmark rather than pushing Log out
    off-screen. */
@@ -609,6 +655,9 @@ button { cursor: pointer; }
   .libswitch { order: 3; margin-left: 0; }
   .libswitch a { flex: 1; text-align: center; padding: 8px 14px; }
   .topbar form { margin-left: 12px; }
+  /* The admin page has no switch to take the second row, so its brand claims
+     the first outright and the back link keeps Log out company below. */
+  .topbar:has(.back) .brand { flex: 1 1 100%; }
 }
 
 /* ---- action strip: full-width on a phone, hairline-divided cells ---- */

backend/internal/web/templates/admin.html

@@ -0,0 +1,39 @@
+{{/* The owner's administrative page: everything that reaches past one Reader,
+     at its own address so it can be bookmarked rather than hunted for inside
+     the reading page. Owner-only at route registration (requireOwner), which
+     is why nothing in here re-tests who is asking. */}}
+{{define "admin"}}
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
+  <meta name="color-scheme" content="dark light">
+  <title>BookmarkManager — Admin</title>
+  <link rel="icon" href="/static/logo.svg" type="image/svg+xml">
+  <link rel="stylesheet" href="/static/style.css">
+  <link rel="preload" href="/static/fonts/instrument-serif-400-latin.woff2" as="font" type="font/woff2" crossorigin>
+  <script src="/static/htmx.min.js" defer></script>
+</head>
+<body>
+<div class="sheet">
+  <header class="topbar">
+    <h1 class="brand">{{template "mark" .}}<span>Bookmark<em>Manager</em></span></h1>
+    {{/* Back to the library, no switch: this page belongs to neither library,
+         and the ember-lit switch says which library you are reading. */}}
+    <a class="ghost back" href="/">Library</a>
+    <form method="post" action="/logout">
+      <button type="submit" class="ghost">Log out</button>
+    </form>
+  </header>
+
+  {{/* The live region wraps the swapped block rather than being it: the
+       refresh replaces the section wholesale, and a region recreated on every
+       update is never announced. */}}
+  <div aria-live="polite">{{template "lanes" .Lanes}}</div>
+
+  {{template "readers" .}}
+</div>
+</body>
+</html>
+{{end}}

backend/internal/web/templates/app.html

@@ -28,6 +28,10 @@
       <a href="/?lib=novel&amp;tab=all" class="{{if eq .Lib "novel"}}active{{end}}"
          {{if eq .Lib "novel"}}aria-current="page"{{end}}>Novels</a>
     </nav>
+    {{/* The owner's only difference on this page: a link out to the
+         administrative one. It sits beside Log out rather than in the library
+         switch — that switch says which library, not which page. */}}
+    {{if .Owner}}<a class="ghost" href="/admin">Admin</a>{{end}}
     <form method="post" action="/logout">
       <button type="submit" class="ghost">Log out</button>
     </form>
@@ -76,8 +80,6 @@
 
   {{template "setup" .}}
 
-  {{if .Owner}}{{template "readers" .}}{{end}}
-
   {{template "keyrow" .}}
 
   {{template "recent" .}}

backend/internal/web/templates/lanes.html

@@ -0,0 +1,42 @@
+{{/* Poll Lane status: one row per Site, refreshing itself so a run can be
+     watched rather than sampled by reloading. The refresh is one attribute on
+     the fragment root and the endpoint answers with this same fragment, so the
+     swap replaces the element that asked for it.
+
+     Every figure here is read out of the running poller, never out of a table:
+     a Site absent from Rows has not completed a pass since the last restart,
+     which the empty state must say — zeroes would read as a stopped Lane. */}}
+{{define "lanes"}}
+<section class="lanes" id="lanes"
+         hx-get="/ui/admin/lanes" hx-trigger="every 30s" hx-swap="outerHTML">
+  <h2>Poll Lanes</h2>
+  {{if .Rows}}
+  <ul class="lanelist">
+    {{range .Rows}}
+    <li{{if .Attention}} class="attention"{{end}}>
+      <span class="lane-site">{{.Site}}</span>
+      <span class="lane-fact">{{.Due}} due</span>
+      <span class="lane-fact">{{.Checked}} checked</span>
+      <span class="lane-fact">ran {{.Ran}}</span>
+      {{if .Gap}}<span class="lane-fact">gap {{.Gap}}</span>{{end}}
+      {{if .Clamped}}<span class="lane-mark">gap at floor</span>{{end}}
+      {{if .Refusing}}<span class="lane-mark">refusing</span>{{end}}
+      {{if .BrowserLost}}<span class="lane-mark">no browser</span>{{end}}
+      {{if .Stalled}}<span class="lane-mark">not checking</span>{{end}}
+      {{if .Asleep}}<span class="lane-mark">browser asleep</span>{{end}}
+    </li>
+    {{end}}
+  </ul>
+  {{else}}
+  <p class="setup-copy">No data yet — no Lane has completed a pass since the
+    backend started.</p>
+  {{end}}
+  <p class="setup-copy lane-browser">
+    {{if .PollerOff}}Polling is switched off in this deployment: no Lane runs,
+    and Latest Chapter comes from the userscripts alone.
+    {{else}}Browser sidecar:
+    {{if not .BrowserConfigured}}not configured — comix, kagane and novelfull
+    pages are not fetched through it{{else if .BrowserReachable}}reachable
+    {{else}}unreachable{{end}}.{{end}}</p>
+</section>
+{{end}}

backend/internal/web/templates/readers.html

@@ -1,29 +1,48 @@
-{{/* The owner's Reader roster. Rendered only for the owner (listView.Owner),
-     and re-rendered whole as the response to a revocation so the session
-     counts cannot describe the state before the tap. Revocation is
-     confirm-gated: it signs someone out of every device at once. */}}
+{{/* The Reader roster, on the owner's administrative page. Re-rendered whole
+     as the response to an action so the counts and marks it shows cannot
+     describe the state before the tap. Both actions are confirm-gated: one
+     signs a Reader out of every device at once, the other wipes a record.
+
+     Owner-only at route registration, so nothing here re-tests who is asking. */}}
 {{define "readers"}}
-<details class="setup" id="readers">
-  <summary>Readers</summary>
+<section class="readers" id="readers">
+  <h2>Readers</h2>
   <p class="setup-copy">Everyone who has signed in through Discord. Revoking
     signs a Reader out of every device; their library and bookmarks are
-    untouched, and they can sign in again.</p>
+    untouched, and they can sign in again. The Sighting counters record how
+    often a later Poll confirmed or contradicted what that Reader's browser
+    reported; enough contradictions stop their reports deferring a Poll, and
+    clearing the marks gives that back.</p>
   <ul class="readerlist">
     {{range .Readers}}
     <li>
       <span class="reader-id">{{.DiscordID}}</span>
       <span class="reader-sessions">{{.Sessions}} session{{if ne .Sessions 1}}s{{end}}</span>
-      {{/* The owner's own row never offers Revoke: it is the one row where the
-           button would sign the tapping browser out, and the endpoint refuses
-           it anyway. Logout is the deliberate way to do that. */}}
-      {{if and .Sessions (ne .ID $.OwnerID)}}
-      <form hx-post="/readers/{{.ID}}/revoke" hx-target="#readers" hx-swap="outerHTML"
-            hx-confirm="Revoking signs this Reader out on every device immediately. Revoke?">
-        <button type="submit" class="ghost danger">Revoke sessions</button>
-      </form>
-      {{end}}
+      <span class="reader-sightings">{{.Agreements}} confirmed / {{.Disagreements}} contradicted</span>
+      {{/* Blocked is spelled out rather than left to be worked out from two
+           numbers and a threshold. */}}
+      {{if .Blocked}}<span class="reader-blocked">deferral blocked</span>{{end}}
+      <span class="reader-actions">
+        {{/* Clearing restores a privilege, so it is a plain ghost button —
+             the destruction accent belongs to revocation alone. It is offered
+             on every row, including one reading zero: the remedy must be
+             findable before the counters climb, not after. */}}
+        <form hx-post="/readers/{{.ID}}/clear-marks" hx-target="#readers" hx-swap="outerHTML"
+              hx-confirm="Clearing wipes this Reader's whole Sighting record, confirmations included. Clear?">
+          <button type="submit" class="ghost">Clear marks</button>
+        </form>
+        {{/* The owner's own row never offers Revoke: it is the one row where the
+             button would sign the tapping browser out, and the endpoint refuses
+             it anyway. Logout is the deliberate way to do that. */}}
+        {{if and .Sessions (ne .ID $.OwnerID)}}
+        <form hx-post="/readers/{{.ID}}/revoke" hx-target="#readers" hx-swap="outerHTML"
+              hx-confirm="Revoking signs this Reader out on every device immediately. Revoke?">
+          <button type="submit" class="ghost danger">Revoke sessions</button>
+        </form>
+        {{end}}
+      </span>
     </li>
     {{end}}
   </ul>
-</details>
+</section>
 {{end}}

backend/internal/web/web.go

@@ -50,6 +50,9 @@ type Handler struct {
 	// httpClient is the plain stdlib client that talks to Discord. It is not
 	// an injected interface: tests point APIBase at a stub server instead.
 	httpClient *http.Client
+	// lanes is the Poll Lane snapshot source the administrative page reads.
+	// Nil is a running deployment with no poller, not a bug.
+	lanes LaneReporter
 }
 
 // listView is what every list-rendering template receives.
@@ -77,14 +80,9 @@ type listView struct {
 	// It is not "newly registered": a Reader who deletes their last bookmark is
 	// in the same position and needs the same links.
 	EmptyLibrary bool
-	// Owner marks the acting Reader as the deployment's owner, which unlocks
-	// the Readers panel. Nothing else in the UI differs.
+	// Owner marks the acting Reader as the deployment's owner, which offers
+	// the link to the administrative page. Nothing else in the UI differs.
 	Owner bool
-	// Readers is the owner's roster, populated only for the owner's own page
-	// render and the revocation fragment. OwnerID travels with it so the roster
-	// can tell the owner's own row apart from the Readers they may revoke.
-	Readers []store.ReaderSummary
-	OwnerID int64
 }
 
 // PageURL and ListURL are the two link shapes every tab needs. Building them
@@ -111,7 +109,10 @@ type loginView struct {
 
 // New parses every template up front so a broken one kills the process at
 // startup rather than the first request that touches it.
-func New(s *store.Store, discord DiscordConfig, tokenKey []byte, mangaPath, novelPath string) (*Handler, error) {
+//
+// lanes is the administrative page's window onto the running Poller; nil means
+// nothing is polling, which the page reports rather than hides.
+func New(s *store.Store, discord DiscordConfig, tokenKey []byte, mangaPath, novelPath string, lanes LaneReporter) (*Handler, error) {
 	tmpl, err := template.ParseFS(templateFS, "templates/*.html")
 	if err != nil {
 		return nil, err
@@ -126,6 +127,7 @@ func New(s *store.Store, discord DiscordConfig, tokenKey []byte, mangaPath, nove
 		states:              newOAuthStates(),
 		limiter:             session.NewLoginLimiter(),
 		httpClient:          &http.Client{Timeout: discordTimeout},
+		lanes:               lanes,
 	}, nil
 }
 
@@ -149,9 +151,11 @@ func (h *Handler) Register(mux *http.ServeMux) {
 	mux.HandleFunc("GET /install/manga-bookmark.user.js", h.requireSession(h.installUserscript("manga-bookmark.user.js")))
 	mux.HandleFunc("GET /install/novel-bookmark.user.js", h.requireSession(h.installUserscript("novel-bookmark.user.js")))
 	mux.HandleFunc("POST /rotate-token", h.requireSession(h.rotateToken))
-
-	// Owner-only: the one place the UI crosses the Reader boundary.
-	mux.HandleFunc("POST /readers/{id}/revoke", h.requireSession(h.revokeReaderSessions))
+	// Owner-only: every route that reaches past the acting Reader is gated in
+	// one place, so a missing gate is visible in the route list.
+	for _, rt := range h.adminRoutes() {
+		mux.HandleFunc(rt.pattern, h.requireOwner(rt.handler))
+	}
 }
 
 // staticHandler serves the embedded assets. An hour, not longer: assets are
@@ -240,14 +244,9 @@ func (h *Handler) index(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "internal error", http.StatusInternalServerError)
 		return
 	}
-	if readerID == h.store.OwnerID() {
-		view.Owner, view.OwnerID = true, readerID
-		if view.Readers, err = h.store.Readers(); err != nil {
-			log.Printf("index readers: %v", err)
-			http.Error(w, "internal error", http.StatusInternalServerError)
-			return
-		}
-	}
+	// The owner's page differs only by the link to the administrative page:
+	// the roster lives there now, so the page read every day is only reading.
+	view.Owner = readerID == h.store.OwnerID()
 	h.render(w, http.StatusOK, "app", view)
 }
 
@@ -618,40 +617,3 @@ func (h *Handler) rotateToken(w http.ResponseWriter, r *http.Request) {
 	view := listView{Lib: store.KindManga, Rotated: true}
 	h.render(w, http.StatusOK, "setup", view)
 }
-
-// revokeReaderSessions logs one Reader out of every browser they are signed
-// in on. Owner-only: it reaches across the Reader boundary every other handler
-// respects, so the guard is a comparison against the seeded owner rather than
-// a role a Reader could acquire. A non-owner gets 404 — the panel does not
-// exist for them, so neither should the endpoint.
-func (h *Handler) revokeReaderSessions(w http.ResponseWriter, r *http.Request) {
-	if readerOf(r) != h.store.OwnerID() {
-		http.NotFound(w, r)
-		return
-	}
-	target, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
-	if err != nil {
-		http.Error(w, "bad reader id", http.StatusBadRequest)
-		return
-	}
-	// The owner is not one of the Readers this endpoint reaches: revoking
-	// themselves would sign out the browser making the request, which is what
-	// logout is for. The roster hides the button; this refuses the hand-rolled
-	// POST behind it.
-	if target == h.store.OwnerID() {
-		http.NotFound(w, r)
-		return
-	}
-	if err := h.store.DeleteReaderSessions(target); err != nil {
-		log.Printf("revoke sessions: %v", err)
-		http.Error(w, "internal error", http.StatusInternalServerError)
-		return
-	}
-	readers, err := h.store.Readers()
-	if err != nil {
-		log.Printf("revoke sessions: %v", err)
-		http.Error(w, "internal error", http.StatusInternalServerError)
-		return
-	}
-	h.render(w, http.StatusOK, "readers", listView{Owner: true, Readers: readers, OwnerID: h.store.OwnerID()})
-}

backend/main.go

@@ -129,7 +129,10 @@ func loadConfig() Config {
 // newRouter wires routes and middleware. CORS is the outermost layer so
 // preflight OPTIONS short-circuits before auth; /bookmarks* is auth-protected,
 // /healthz is public.
-func newRouter(s *store.Store, cfg Config) http.Handler {
+//
+// lanes may be nil — polling disabled, or its client could not be built. The
+// admin page reports that rather than pretending Lanes exist.
+func newRouter(s *store.Store, cfg Config, lanes web.LaneReporter) http.Handler {
 	mux := http.NewServeMux()
 	h := &api.Handler{Store: s}
 	mux.HandleFunc("GET /healthz", api.Healthz)
@@ -160,7 +163,7 @@ func newRouter(s *store.Store, cfg Config) http.Handler {
 	// The browser UI is always registered; signing in is Discord OAuth, so
 	// there is no password to forget and no gate to leave unset.
 	wh, err := web.New(s, cfg.Discord, []byte(cfg.TokenKey),
-		cfg.UserscriptPath, cfg.NovelUserscriptPath)
+		cfg.UserscriptPath, cfg.NovelUserscriptPath, lanes)
 	if err != nil {
 		log.Fatalf("web handler: %v", err)
 	}
@@ -275,11 +278,17 @@ func main() {
 		}
 		s.OnSeriesCreated = acq.Acquire
 	}
-	startLatestPoller(pollCtx, s, cfg.LatestPoll, browser)
+	// A nil *Poller must not become a non-nil interface holding a nil pointer:
+	// the admin page tests the reporter for nil to decide whether anything is
+	// polling at all.
+	var lanes web.LaneReporter
+	if poller := startLatestPoller(pollCtx, s, cfg.LatestPoll, browser); poller != nil {
+		lanes = poller
+	}
 
 	srv := &http.Server{
 		Addr:              ":" + cfg.Port,
-		Handler:           newRouter(s, cfg),
+		Handler:           newRouter(s, cfg, lanes),
 		ReadHeaderTimeout: 10 * time.Second,
 	}
 
@@ -326,16 +335,17 @@ func newLatestPoller(s *store.Store, cfg LatestPoll, fetch, browser latest.Fetch
 // startLatestPoller launches the background poller unless it is disabled or its
 // HTTP client cannot be built. Any problem here is logged and skipped: this
 // feature going missing degrades the service to userscript-only latest-chapter
-// tracking, which is exactly how it behaved before.
-func startLatestPoller(ctx context.Context, s *store.Store, cfg LatestPoll, browser latest.Fetcher) {
+// tracking, which is exactly how it behaved before. It returns the running
+// Poller, or nil when there is none — the admin page's Lane status reads it.
+func startLatestPoller(ctx context.Context, s *store.Store, cfg LatestPoll, browser latest.Fetcher) *latest.Poller {
 	if !cfg.Enabled {
 		log.Println("latest-chapter poller: disabled by config")
-		return
+		return nil
 	}
 	f, err := latest.NewTLSFetcher()
 	if err != nil {
 		log.Printf("latest-chapter poller: disabled, cannot build client: %v", err)
-		return
+		return nil
 	}
 	// Nil browser: sites behind a JavaScript challenge are simply not polled,
 	// and their latest_chapter comes from the userscript alone — which is how
@@ -343,4 +353,5 @@ func startLatestPoller(ctx context.Context, s *store.Store, cfg LatestPoll, brow
 	p := newLatestPoller(s, cfg, f, browser)
 
 	go p.Run(ctx)
+	return p
 }

backend/reader_credential_test.go

@@ -49,7 +49,7 @@ func withBody(req *http.Request, body string) *http.Request {
 // A refused credential is refused however plausible it looks: only a hash the
 // readers table holds authenticates anything.
 func TestUnknownCredentialRejected(t *testing.T) {
-	srv := newRouter(newTestStore(t), testConfig())
+	srv := newRouter(newTestStore(t), testConfig(), nil)
 
 	rr := httptest.NewRecorder()
 	srv.ServeHTTP(rr, credRequest(http.MethodGet, "/bookmarks", readerCredential("never-registered")))
@@ -69,7 +69,7 @@ func TestUnknownCredentialRejected(t *testing.T) {
 func TestPerReaderIsolation(t *testing.T) {
 	s := newTestStore(t)
 	registerReader(t, s, "other-reader")
-	srv := newRouter(s, testConfig())
+	srv := newRouter(s, testConfig(), nil)
 
 	ownerKey := "asura:solo"
 	putBookmark(t, srv, ownerKey, store.Bookmark{
@@ -267,7 +267,7 @@ func TestRotateCredentialViaWebUI(t *testing.T) {
 	}
 	cfg := testConfig()
 	cfg.UserscriptPath = path
-	srv := newRouter(s, cfg)
+	srv := newRouter(s, cfg, nil)
 
 	oldCred := ownerCredential()
 	rr := httptest.NewRecorder()

backend/web_test.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"database/sql"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -15,6 +16,7 @@ import (
 	"testing"
 	"time"
 
+	"bookmarkmanager/backend/internal/latest"
 	"bookmarkmanager/backend/internal/session"
 	"bookmarkmanager/backend/internal/store"
 	"bookmarkmanager/backend/internal/web"
@@ -26,11 +28,17 @@ import (
 const testOwnerID = "owner-snowflake"
 
 // newWebTestServer returns the full router plus the store behind it, so tests
-// can seed rows and assert on what the handlers wrote back.
-func newWebTestServer(t *testing.T, cfg Config) (http.Handler, *store.Store) {
+// can seed rows and assert on what the handlers wrote back. An optional lane
+// reporter stands in for the running poller; omitted means none is running,
+// which is what every test that is not about the admin page wants.
+func newWebTestServer(t *testing.T, cfg Config, lanes ...web.LaneReporter) (http.Handler, *store.Store) {
 	t.Helper()
 	st := newTestStore(t)
-	return newRouter(st, cfg), st
+	var reporter web.LaneReporter
+	if len(lanes) > 0 {
+		reporter = lanes[0]
+	}
+	return newRouter(st, cfg, reporter), st
 }
 
 // sessionCookie mints a live session row for the owner and returns the cookie
@@ -141,12 +149,12 @@ func discordConfig(stubURL string) web.DiscordConfig {
 
 // oauthWebTestServer returns the full router, its store, and a Discord stub
 // wired as the configured API — the starting point for sign-in tests.
-func oauthWebTestServer(t *testing.T) (http.Handler, *store.Store, *discordStub) {
+func oauthWebTestServer(t *testing.T, lanes ...web.LaneReporter) (http.Handler, *store.Store, *discordStub) {
 	t.Helper()
 	stub, srv := newDiscordStub(t)
 	cfg := testConfig()
 	cfg.Discord = discordConfig(srv.URL)
-	router, st := newWebTestServer(t, cfg)
+	router, st := newWebTestServer(t, cfg, lanes...)
 	return router, st, stub
 }
 
@@ -410,7 +418,7 @@ func TestDiscordLoginRefusesNonMember(t *testing.T) {
 			cfg.Discord = discordConfig(srv.URL)
 			cfg.Discord.RequiredRole = tc.require
 			st := newTestStore(t)
-			router := newRouter(st, cfg)
+			router := newRouter(st, cfg, nil)
 
 			rr := completeSignIn(t, router, startSignIn(t, router))
 			if rr.Code != http.StatusForbidden {
@@ -626,24 +634,52 @@ func TestOwnerRevokesAnotherReadersSessions(t *testing.T) {
 	}
 }
 
-// The owner's own page carries the roster; nobody else's does.
-func TestOwnerSeesReadersPanel(t *testing.T) {
+// fakeLanes is the admin page's poller stand-in: one fixed snapshot, so the
+// page's tests need neither a poller nor a Site.
+type fakeLanes struct{ status latest.Status }
+
+func (f fakeLanes) LaneStatus() latest.Status { return f.status }
+
+// The roster moved off the reading page onto its own address: the owner gets a
+// link, everyone else gets nothing, and the page itself lists every Reader with
+// the counters and the two controls.
+func TestAdminPageCarriesRosterAndOwnerLink(t *testing.T) {
 	router, st, _ := oauthWebTestServer(t)
-	signInCookie(t, router)
+	theirCookie := signInCookie(t, router)
+	ownerCookie := sessionCookie(t, st)
 
 	req := httptest.NewRequest(http.MethodGet, "/", nil)
-	req.AddCookie(sessionCookie(t, st))
+	req.AddCookie(ownerCookie)
 	rr := httptest.NewRecorder()
 	router.ServeHTTP(rr, req)
 	body := rr.Body.String()
-	if !strings.Contains(body, `id="readers"`) {
-		t.Fatal("the owner's page lacks the Readers panel")
+	if strings.Contains(body, `id="readers"`) {
+		t.Error("the reading page still carries the roster; it belongs on /admin")
 	}
-	if !strings.Contains(body, testOwnerID) {
-		t.Fatalf("the roster does not list the registered Reader:\n%s", body)
+	if !strings.Contains(body, `href="/admin"`) {
+		t.Error("the owner's reading page offers no link to the admin page")
 	}
-	if !strings.Contains(body, "Revoke sessions") {
-		t.Fatal("the roster offers no revocation control for a signed-in Reader")
+
+	req = httptest.NewRequest(http.MethodGet, "/", nil)
+	req.AddCookie(theirCookie)
+	rr = httptest.NewRecorder()
+	router.ServeHTTP(rr, req)
+	if strings.Contains(rr.Body.String(), `href="/admin"`) {
+		t.Error("a non-owner was offered the admin link")
+	}
+
+	req = httptest.NewRequest(http.MethodGet, "/admin", nil)
+	req.AddCookie(ownerCookie)
+	rr = httptest.NewRecorder()
+	router.ServeHTTP(rr, req)
+	if rr.Code != http.StatusOK {
+		t.Fatalf("GET /admin status = %d, want 200", rr.Code)
+	}
+	body = rr.Body.String()
+	for _, want := range []string{`id="readers"`, testOwnerID, "Revoke sessions", "Clear marks", "confirmed"} {
+		if !strings.Contains(body, want) {
+			t.Errorf("admin page lacks %q:\n%s", want, body)
+		}
 	}
 	// Exactly one revocable row: the other Reader's. The owner's own row carries
 	// the same session count and no button.
@@ -652,6 +688,231 @@ func TestOwnerSeesReadersPanel(t *testing.T) {
 	}
 }
 
+// Every administrative route is gated the same way, so the test walks the list
+// the router registers rather than naming routes by hand: no session is 401,
+// a signed-in non-owner is 404, and the address is not confirmed to either.
+func TestAdminRoutesAreOwnerOnly(t *testing.T) {
+	router, st, _ := oauthWebTestServer(t)
+	theirCookie := signInCookie(t, router)
+	ownerCookie := sessionCookie(t, st)
+	target := strconv.FormatInt(st.OwnerID(), 10)
+
+	patterns := web.AdminPatterns()
+	if len(patterns) == 0 {
+		t.Fatal("no administrative routes to test")
+	}
+	for _, pattern := range patterns {
+		method, path, ok := strings.Cut(pattern, " ")
+		if !ok {
+			t.Fatalf("route pattern %q has no method", pattern)
+		}
+		path = strings.Replace(path, "{id}", target, 1)
+
+		for _, tc := range []struct {
+			name   string
+			cookie *http.Cookie
+			want   int
+		}{
+			{"no session", nil, http.StatusUnauthorized},
+			{"non-owner", theirCookie, http.StatusNotFound},
+		} {
+			req := httptest.NewRequest(method, path, nil)
+			if tc.cookie != nil {
+				req.AddCookie(tc.cookie)
+			}
+			rr := httptest.NewRecorder()
+			router.ServeHTTP(rr, req)
+			if rr.Code != tc.want {
+				t.Errorf("%s %s as %s: status = %d, want %d", method, path, tc.name, rr.Code, tc.want)
+			}
+		}
+
+		req := httptest.NewRequest(method, path, nil)
+		req.AddCookie(ownerCookie)
+		rr := httptest.NewRecorder()
+		router.ServeHTTP(rr, req)
+		if rr.Code == http.StatusUnauthorized {
+			t.Errorf("%s %s as the owner: status = 401, the gate rejects the owner", method, path)
+		}
+	}
+}
+
+// The Lane block reports what the poller says, and marks the Lanes that need
+// attention — a clamped gap, a refusal, a Site whose pages can only be read
+// through a sidecar that is not there, and a Lane with Series waiting that its
+// last pass did not read.
+func TestAdminPageShowsLaneStatus(t *testing.T) {
+	lanes := fakeLanes{latest.Status{
+		Lanes: []latest.LaneState{
+			{Site: "asura", Due: 12, Checked: 12, LastRun: time.Now().Add(-90 * time.Second), Gap: 40 * time.Second},
+			{Site: "kagane", Due: 3, Checked: 3, LastRun: time.Now().Add(-time.Minute), Gap: time.Minute, Browser: true},
+			{Site: "demonic", Due: 400, Checked: 400, LastRun: time.Now(), Gap: 8 * time.Second, Clamped: true},
+			{Site: "comix", Due: 7, LastRun: time.Now(), Gap: time.Minute, Browser: true},
+		},
+		BrowserConfigured: true,
+		BrowserReachable:  true,
+	}}
+	router, st, _ := oauthWebTestServer(t, lanes)
+
+	req := httptest.NewRequest(http.MethodGet, "/ui/admin/lanes", nil)
+	req.AddCookie(sessionCookie(t, st))
+	rr := httptest.NewRecorder()
+	router.ServeHTTP(rr, req)
+	if rr.Code != http.StatusOK {
+		t.Fatalf("GET /ui/admin/lanes status = %d, want 200", rr.Code)
+	}
+	body := rr.Body.String()
+	for _, want := range []string{"asura", "kagane", "12 due", "12 checked", "gap 40s", "ran 1m30s ago", "gap at floor", "not checking", "reachable"} {
+		if !strings.Contains(body, want) {
+			t.Errorf("lane status lacks %q:\n%s", want, body)
+		}
+	}
+	// Nothing is refusing and the sidecar is up, so neither mark may appear:
+	// a mark the owner cannot act on is worse than none.
+	for _, unwanted := range []string{"refusing", "no browser"} {
+		if strings.Contains(body, unwanted) {
+			t.Errorf("lane status marks %q on a healthy run:\n%s", unwanted, body)
+		}
+	}
+}
+
+// A browser Lane under both wake thresholds holds Chrome asleep (ADR-0005), so
+// Series due with none checked is the design working, not a stopped Lane. The
+// two must not render the same mark: "not checking" is the owner's cue to go
+// looking, and spending it on the commonest healthy browser-Lane state trains
+// them to ignore it.
+func TestAsleepBrowserLaneIsNotMarkedStalled(t *testing.T) {
+	lanes := fakeLanes{latest.Status{
+		Lanes: []latest.LaneState{
+			{Site: "kagane", Due: 1, LastRun: time.Now(), Gap: 10 * time.Second, Browser: true, Asleep: true},
+		},
+		BrowserConfigured: true,
+		BrowserReachable:  true,
+	}}
+	router, st, _ := oauthWebTestServer(t, lanes)
+
+	req := httptest.NewRequest(http.MethodGet, "/ui/admin/lanes", nil)
+	req.AddCookie(sessionCookie(t, st))
+	rr := httptest.NewRecorder()
+	router.ServeHTTP(rr, req)
+	body := rr.Body.String()
+	if strings.Contains(body, "not checking") {
+		t.Errorf("an asleep browser Lane is marked as stalled:\n%s", body)
+	}
+	if !strings.Contains(body, "browser asleep") {
+		t.Errorf("an asleep browser Lane says nothing about why it read nothing:\n%s", body)
+	}
+	if strings.Contains(body, `class="attention"`) {
+		t.Errorf("an asleep browser Lane is coloured as unhealthy:\n%s", body)
+	}
+}
+
+// A Lane whose pass never reached a figure must not have that figure drawn as
+// a zero: a refusing Lane still reports the due count and gap its last real
+// pass saw, and a Lane that has never reached one omits it entirely.
+func TestLaneStatusOmitsUnknownGap(t *testing.T) {
+	lanes := fakeLanes{latest.Status{
+		Lanes:             []latest.LaneState{{Site: "comix", LastRun: time.Now(), Refusing: true, Browser: true}},
+		BrowserConfigured: true,
+		BrowserReachable:  true,
+	}}
+	router, st, _ := oauthWebTestServer(t, lanes)
+
+	req := httptest.NewRequest(http.MethodGet, "/ui/admin/lanes", nil)
+	req.AddCookie(sessionCookie(t, st))
+	rr := httptest.NewRecorder()
+	router.ServeHTTP(rr, req)
+	body := rr.Body.String()
+	if strings.Contains(body, "gap 0s") {
+		t.Errorf("a Lane with no pace yet states a zero gap:\n%s", body)
+	}
+	if !strings.Contains(body, "refusing") {
+		t.Errorf("a refusing Lane is not marked as such:\n%s", body)
+	}
+}
+
+// No poller and a poller that has not finished a pass both render "no data
+// yet" rather than zeroes that read as a stopped backend — but they are not
+// the same fact, so the page must not blame the sidecar when nothing polls.
+func TestAdminPageWithoutAPollerSaysSo(t *testing.T) {
+	for _, tc := range []struct {
+		name         string
+		lanes        []web.LaneReporter
+		want, unwant string
+	}{
+		{"no poller", nil, "Polling is switched off", "not configured"},
+		{"poller, no pass yet", []web.LaneReporter{fakeLanes{}}, "not configured", "Polling is switched off"},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			router, st, _ := oauthWebTestServer(t, tc.lanes...)
+			req := httptest.NewRequest(http.MethodGet, "/admin", nil)
+			req.AddCookie(sessionCookie(t, st))
+			rr := httptest.NewRecorder()
+			router.ServeHTTP(rr, req)
+			body := rr.Body.String()
+			if !strings.Contains(body, "No data yet") {
+				t.Errorf("admin page with no Lane data does not say so:\n%s", body)
+			}
+			if !strings.Contains(body, tc.want) {
+				t.Errorf("admin page lacks %q:\n%s", tc.want, body)
+			}
+			if strings.Contains(body, tc.unwant) {
+				t.Errorf("admin page states %q, which is not what is wrong:\n%s", tc.unwant, body)
+			}
+		})
+	}
+}
+
+// A Reader past the disagreement threshold is rendered as blocked, and
+// clearing their marks both zeroes the counters and lifts the block in the
+// roster the response carries back.
+func TestOwnerClearsReaderMarks(t *testing.T) {
+	st, dsn := newTestStoreURL(t)
+	router := newRouter(st, testConfig(), nil)
+	cookie := sessionCookie(t, st)
+	// The counters are filled by issue #103; until it lands the only way to
+	// stand a marked Reader up is to write the columns directly.
+	db, err := sql.Open("pgx", dsn)
+	if err != nil {
+		t.Fatalf("open %s: %v", dsn, err)
+	}
+	defer db.Close()
+	if _, err := db.Exec(`UPDATE readers SET sighting_agreements = 4, sighting_disagreements = 3 WHERE id = $1`, st.OwnerID()); err != nil {
+		t.Fatalf("mark reader: %v", err)
+	}
+
+	req := httptest.NewRequest(http.MethodGet, "/admin", nil)
+	req.AddCookie(cookie)
+	rr := httptest.NewRecorder()
+	router.ServeHTTP(rr, req)
+	body := rr.Body.String()
+	if !strings.Contains(body, "4 confirmed / 3 contradicted") {
+		t.Errorf("roster does not report the Reader's marks:\n%s", body)
+	}
+	if !strings.Contains(body, "deferral blocked") {
+		t.Errorf("a Reader at the threshold is not rendered as blocked:\n%s", body)
+	}
+
+	req = httptest.NewRequest(http.MethodPost,
+		"/readers/"+strconv.FormatInt(st.OwnerID(), 10)+"/clear-marks", nil)
+	req.AddCookie(cookie)
+	rr = httptest.NewRecorder()
+	router.ServeHTTP(rr, req)
+	if rr.Code != http.StatusOK {
+		t.Fatalf("clear marks: status = %d, want 200 (body %s)", rr.Code, rr.Body.String())
+	}
+	body = rr.Body.String()
+	if !strings.Contains(body, `id="readers"`) {
+		t.Fatalf("clear marks did not re-render the roster:\n%s", body)
+	}
+	if !strings.Contains(body, "0 confirmed / 0 contradicted") {
+		t.Errorf("roster does not report the cleared counters:\n%s", body)
+	}
+	if strings.Contains(body, "deferral blocked") {
+		t.Errorf("a cleared Reader is still marked blocked:\n%s", body)
+	}
+}
+
 func TestDiscordLoginTokenEndpointDown(t *testing.T) {
 	stub, srv := newDiscordStub(t)
 	stub.tokenStatus = http.StatusInternalServerError

docs/adr/0011-sighting-deferral-trust-model.md

@@ -0,0 +1,139 @@
+# ADR-0011: Sightings — a Reader report defers a Poll where being wrong hurts only them
+
+Date: 2026-08-16
+Status: accepted
+
+## Decision
+
+A **Sighting** is the Latest Chapter the Reader's own browser read off the
+Series page and PUT to the backend. It is now allowed to stand in for a Poll,
+under one restriction and one ceiling:
+
+- **Solitary Series only.** A Sighting defers the Poll of a Series exactly one
+  Bookmark points at. A Series two Readers share is Polled on schedule no matter
+  how recently it was sighted.
+- **One rest of standing.** A Sighting postpones Polls for one Rest
+  (`defaultRest`, an hour), not forever: a Series nobody visits again returns to
+  the normal schedule by itself.
+- **Six-rest ceiling.** `sightingCeilingRests = 6`, counted in the Site's own
+  Rest — six hours everywhere today. However many Sightings arrive, a Series
+  unpolled that long is Polled.
+
+Both live in the due query's HAVING clause (`store.DueForLatestCheck`), beside
+the Rest cutoff — the same place the schedule has always been decided, so no
+timer and no second code path can disagree with it.
+
+Attribution and judgement:
+
+- `Store.RecordSighting` runs *before* the Upsert that stores the reported
+  value, because the raise test needs the row as it stands. A report that raises
+  the stored Latest Chapter names its Reader in `series.latest_raised_by`.
+- The Poll is the oracle. `Poller.checkOne` already compares what the Site
+  publishes against what is stored, so judgement costs no extra request: a lower
+  number contradicts the Sighting (`sighting_disagreements + 1`, both numbers and
+  the Reader logged), the same number confirms it (`sighting_agreements + 1`), a
+  **higher** number is the Site publishing and means nothing either way — but it
+  does clear the attribution (`Store.ClearSightingAttribution`), because the
+  value stored afterwards is the Poll's own and nobody must answer for it.
+- At `SightingDisagreementLimit` (3) that Reader's Sightings stop deferring
+  anything. They still write the Latest Chapter — the penalty removes a
+  privilege, it does not silence anyone.
+- `SightingAgreementsToClear` (20) consecutive confirmations forgive the
+  disagreements. A disagreement resets the run to zero.
+- The owner clears marks from the administration page (issue #102, shipped
+  first precisely so a false mark has a remedy the day the mechanism lands).
+
+One client change was required, and only one. Both userscripts stopped short of
+PUTting a read whose number had not moved (`applyLatestChapterIfChanged`), so
+the case this whole mechanism exists for — visiting a Series with nothing new —
+never reached the backend. `reportLatestChapter` now sends it, skipping only the
+local write and the re-render. A numberless PUT (favourite toggle, progress from
+a chapter page) is not a Sighting and defers nothing: nobody read the Series
+page, so there would be nothing to judge later.
+
+## Why
+
+Most of the backend's work was redundant. The userscript reads the Latest
+Chapter on every Series page visit; minutes later the Poll Lane fetches the same
+page for the same number. Deferring on a report converts a visit into a Poll
+saved, which is Lane capacity handed back to Series nobody is
+reading.
+
+The restriction is the whole safety argument, and it is about **blast radius**,
+not about trust arithmetic:
+
+- On a solitary Series, a wrong report can only mislead the Reader who made it.
+  There is nobody else's ember to falsify.
+- On a shared Series it could mislead someone else, so a report never postpones
+  anything there.
+
+The ceiling bounds the damage in time: a false value dies within six hours
+whatever happens, because the Poll that finds it is guaranteed. That is also
+what makes lying pointless — the six-hour audit is certain, not sampled, so a
+determined attacker buys at most three ceilings' worth of a wrong number on
+their own Series and then loses deferral entirely.
+
+The cost of recovery is deliberate. An agreement is only recorded when a later
+Poll confirms a Sighting, so twenty agreements are twenty Polls of Series that
+Reader bookmarks — hours to days of real time, not twenty page views. Waiting is
+therefore not a strategy, and credit cannot be banked in advance.
+
+## Tradeoffs and rejections
+
+- **Trusting a Sighting on a shared Series** rejected: it is the only case where
+  one Reader's mistake reaches another Reader's list, and no amount of
+  reputation makes that recoverable within the six-hour window.
+- **Cross-Reader agreement, voting, weighting, consensus scoring** rejected on
+  evidence: every truth-discovery method estimates source reliability by
+  comparing sources on the same object, and the standard survey states outright
+  that an object provided by very few sources cannot have its confidence
+  evaluated — Li, Gao, Meng, Li, Su, Zhao, Fan, Han, *A Survey on Truth
+  Discovery*, SIGMOD Record 45(1), 2016 (arXiv:1505.02463), §"Challenges" on
+  sparse sources. With the two Readers this backend actually has, a
+  disagreement is a coin flip. The Poll is an authoritative oracle, so it is
+  the only judge.
+- **A randomised audit** (Poll a fraction of deferred Series) rejected in favour
+  of the fixed ceiling. Sampling an oracle against untrusted reports is the
+  gold-question technique from crowdsourcing quality control — Le, Edmonds,
+  Hester, Biewald, *Ensuring quality in crowdsourced search relevance
+  evaluation: the effects of training question distribution*, SIGIR 2010
+  Workshop on Crowdsourcing for Search Evaluation, which inserts known answers
+  sporadically and adjusts each worker's trust from them. The ceiling is the
+  same idea made deterministic: sampling prices an attack in expectation, a
+  guaranteed six-hour audit prices it as a certainty, which is what makes the
+  solitary-Series rule defensible in one sentence.
+- **A trust *ratio*** (agreements over judgements, as that same gold-question
+  scheme uses) rejected for two thresholds: a ratio lets an attacker bank
+  credit first and spend it on lies later, and it needs the owner watching a
+  score to act. Three-and-twenty is a threshold both ways — a disagreement
+  resets the run to zero, so credit cannot be pre-bought, and recovery happens
+  without the owner in the loop.
+- **Blocking a marked Reader's writes** rejected: the Latest Chapter they report
+  is still the best available value, and their Sightings must keep being judged
+  or they could never earn the privilege back.
+- **Per-Series flagging** rejected in favour of per-Reader marks: a Series is
+  not the thing that can be wrong. Naming the Reader and logging both numbers is
+  also what distinguishes a broken Site adapter (every Reader of that Site
+  contradicted at once) from one bad actor.
+- **Timers or a background reputation job** rejected: deferral is recomputed
+  from live facts every round — Bookmark count and sighting timestamp — so a
+  Series that gains a second Bookmark stops deferring at once, with nothing to
+  invalidate. The Reader's marks are the one input read earlier, when the
+  Sighting is recorded rather than when the round runs: a Reader who crosses
+  the threshold, or has their marks cleared, changes behaviour from their next
+  Sighting on, and the standing they already bought lasts out its rest. That is
+  bounded by one rest and costs one subselect instead of joining `readers` into
+  the due query on every round.
+
+## Constraints preserved
+
+- A Sighting is not Progress: it may move the Latest Chapter and nothing else.
+  `updated_at` never moves, so a report cannot reorder the list (ADR-0004).
+- The Latest Chapter is a Series-level fact (ADR-0003): a Sighting writes the
+  shared row, so every Reader of a shared Series sees it immediately — deferral
+  is the only thing the solitary rule withholds.
+- Ember means new chapter only (`docs/design-system.md`): a marked Reader
+  renders no differently in their own list, and nothing about the trust model
+  reaches the Series list's colour.
+- The Poll remains authoritative. Where a Sighting and a Poll disagree, the
+  Poll's value is what gets stored.

docs/design-system.md

@@ -10,7 +10,7 @@ Implemented in:
 
 | Surface | Files |
 | --- | --- |
-| Web UI (login, list, card, empty, errors) | `backend/internal/web/static/style.css`, `backend/internal/web/templates/{app,card,list,login,chrome,icons}.html`, `backend/internal/web/static/filter.js` |
+| Web UI (login, list, card, empty, errors, admin) | `backend/internal/web/static/style.css`, `backend/internal/web/templates/{app,admin,lanes,readers,card,list,login,chrome,icons}.html`, `backend/internal/web/static/filter.js` |
 | Userscript panel (Shadow DOM) | `userscript/manga-bookmark.user.js` — `TEMPLATE` and `CSS` at the bottom of the IIFE |
 
 ## 1. The one idea
@@ -73,6 +73,7 @@ Defined once in `backend/internal/web/static/style.css` `:root`, mirrored in the
 | `--moss` | `#7fae86` | `#3d6c46` | finished accent |
 | `--clay` | `#b5906f` | `#7c5533` | set-chapter accent |
 | `--trash` | `#977671` | `#8c6558` | remove, at rest — icons need 3:1, not 4.5:1 |
+| `--patina` | `#5fb3a6` | `#1f6f66` | admin page only — a Poll Lane needing attention, a Reader whose reports are blocked |
 | `--play-hot-line` | `#3a1d18` | `#f0cfc6` | desktop cell border, play when `.is-new` |
 | `--fav-line` | `#332b14` | `#e3d3a4` | desktop cell border, favourite when on |
 | `--asura` | `#7d93a5` | `#4f6b80` | site tag |
@@ -81,9 +82,13 @@ Defined once in `backend/internal/web/static/style.css` `:root`, mirrored in the
 | `--kagane` | `#9a8aa5` | `#6f5f7d` | site tag |
 | `--hatch` / `--hatch-dim` | 135° 5px stripe | paper stripe | missing-cover slot |
 
-`--slate`/`--moss`/`--clay`/`--brass` are held at the same weight deliberately:
-one accent per action, so a press says which lane it belongs to, with none of
-them competing with ember. Dark is the default (`color-scheme: dark light`);
+`--slate`/`--moss`/`--clay`/`--brass`/`--patina` are held at the same weight
+deliberately: one accent per meaning, so a press says which lane it belongs to,
+with none of them competing with ember. `--patina` is the admin page's only
+colour — a cool verdigris, the far side of the wheel from ember's crimson and
+clear of the archive blue: system health is neither a new chapter nor
+destruction, so it borrows neither `--ember` nor `--danger`.
+Dark is the default (`color-scheme: dark light`);
 light is a `@media (prefers-color-scheme: light)` override of the same names.
 **Any new colour must be added in both branches** — light is not a filter over
 dark, the hues are re-tuned.
@@ -140,6 +145,14 @@ Recurring specs (copy these rather than inventing sizes):
   main#list      article.card …  |  .empty
 ```
 
+The owner's admin page (`admin.html`) is the same sheet with two sections in
+place of the list — `.lanes` (Poll Lane rows) and `.readers` (the roster) —
+and no library switch: it belongs to neither library, so its topbar carries a
+plain `.ghost.back` link home. Both sections are eyebrow + hairline-separated
+rows, the shape the roster already had as a fold-out. `.lanes` refreshes itself
+every 30s via `hx-get="/ui/admin/lanes"` with `hx-swap="outerHTML"`; the roster
+re-renders only in answer to an action.
+
 **Brand mark**: an inline `<svg class="mark">` (`viewBox="0 0 200 172"`),
 defined once in `chrome.html`'s `mark` template and reused by `app.html` and
 `login.html` so it takes the page's `--ink`/`currentColor`/`--ember` rather

graphify-out/.graphify_labels.json

@@ -12,9 +12,8 @@
   "10": "Go Test Helpers",
   "11": "Store Tests",
   "12": "Bookmarks API Handler",
-  "13": "Web UI Handlers",
+  "13": "displayChapter",
   "14": "Go Error Handling",
-  "15": "CDP Browser Client",
   "16": "Cloudflare bot scoring and poll cadence — what is actually documented",
   "17": "Go Code Style Guide",
   "18": "Agent Skills",
@@ -30,7 +29,6 @@
   "28": "Allocation Patterns",
   "29": "Observability & Alerting",
   "30": "AGENTS.md",
-  "31": "Store",
   "32": "Open",
   "33": "Go Testing Guide",
   "34": "Session Store",
@@ -40,7 +38,7 @@
   "38": "novel-logic.test.js",
   "39": "UI Critique 2026-07-26A",
   "40": "UI Critique 2026-07-26B",
-  "42": "pgtest.go",
+  "41": "Handler",
   "43": "Issue Tracker & Triage",
   "44": "Ticket Workflow",
   "45": "Go Perf Alert Rules",
@@ -123,7 +121,6 @@
   "122": "Identity comes from Discord OAuth; we store no passwords and send no email",
   "123": "The wire format stays flat and deliberately does not mirror the schema",
   "124": "ADR-0005: On-demand browser sidecar",
-  "125": "sessions_test.go",
   "126": "Bookmark Manager",
   "127": "triage-labels.md",
   "128": "Cross-Ticket Contract",
@@ -151,6 +148,8 @@
   "150": "Reviewer Subagent (opencode)",
   "151": "Finding Severity Rubric",
   "152": "Spec Compliance Review",
+  "154": "ADR-0011: Sightings — a Reader report defers a Poll where being wrong hurts only them",
+  "156": "ResponseWriter",
   "161": "Why Use samber/oops",
   "162": "singleflight Cache Stampede Prevention",
   "163": "Struct Field Alignment",
@@ -205,10 +204,6 @@
   "245": "wayfinder map/ticket mechanism",
   "246": "Triage labels: canonical roles to tracker labels",
   "247": "Canonical triage role labels (needs-triage ... wontfix)",
-  "248": "Cinder (BookmarkManager Web UI design system)",
-  "249": "Heat is typographic: ember reserved for unread chapters",
-  "250": "Design tokens (dark + light branches, no hardcoded hex)",
-  "251": "Three type roles: display serif / mono small-caps / sans",
   "252": "a[aria-label='All Chapter'] priority pointer",
   "253": "Research: lightnovelworld chapter slug vs series slug",
   "254": "Gitea issue #77 (chapter vs series slug)",

graphify-out/GRAPH_REPORT.md

@@ -1,16 +1,16 @@
 # Graph Report - mangaBookmark  (2026-08-16)
 
 ## Corpus Check
-- 113 files · ~279,161 words
+- 119 files · ~291,777 words
 - Verdict: corpus is large enough that graph structure adds value.
 
 ## Summary
-- 1668 nodes · 3379 edges · 222 communities (68 shown, 154 thin omitted)
-- Extraction: 91% EXTRACTED · 9% INFERRED · 0% AMBIGUOUS · INFERRED: 320 edges (avg confidence: 0.77)
+- 1739 nodes · 3610 edges · 217 communities (67 shown, 150 thin omitted)
+- Extraction: 90% EXTRACTED · 10% INFERRED · 0% AMBIGUOUS · INFERRED: 363 edges (avg confidence: 0.78)
 - Token cost: 0 input · 0 output
 
 ## Graph Freshness
-- Built from commit: `4f1cbcfd`
+- Built from commit: `20fff588`
 - Run `git rev-parse HEAD` and compare to check if the graph is stale.
 - Run `graphify update .` after code changes (no API cost).
 
@@ -28,9 +28,8 @@
 - [[_COMMUNITY_Go Test Helpers|Go Test Helpers]]
 - [[_COMMUNITY_Store Tests|Store Tests]]
 - [[_COMMUNITY_Bookmarks API Handler|Bookmarks API Handler]]
-- [[_COMMUNITY_Web UI Handlers|Web UI Handlers]]
+- [[_COMMUNITY_displayChapter|displayChapter]]
 - [[_COMMUNITY_Go Error Handling|Go Error Handling]]
-- [[_COMMUNITY_CDP Browser Client|CDP Browser Client]]
 - [[_COMMUNITY_Cloudflare bot scoring and poll cadence — what is actually documented|Cloudflare bot scoring and poll cadence — what is actually documented]]
 - [[_COMMUNITY_Go Code Style Guide|Go Code Style Guide]]
 - [[_COMMUNITY_Agent Skills|Agent Skills]]
@@ -45,8 +44,7 @@
 - [[_COMMUNITY_Find Skills Guide|Find Skills Guide]]
 - [[_COMMUNITY_Allocation Patterns|Allocation Patterns]]
 - [[_COMMUNITY_Observability & Alerting|Observability & Alerting]]
-- [[_COMMUNITY_Store|Store]]
-- [[_COMMUNITY_Open|Open]]
+- [[_COMMUNITY_AGENTS|AGENTS.md]]
 - [[_COMMUNITY_Go Testing Guide|Go Testing Guide]]
 - [[_COMMUNITY_Session Store|Session Store]]
 - [[_COMMUNITY_Web UI Filter Logic|Web UI Filter Logic]]
@@ -55,7 +53,7 @@
 - [[_COMMUNITY_novel-logic.test.js|novel-logic.test.js]]
 - [[_COMMUNITY_UI Critique 2026-07-26A|UI Critique 2026-07-26A]]
 - [[_COMMUNITY_UI Critique 2026-07-26B|UI Critique 2026-07-26B]]
-- [[_COMMUNITY_pgtest.go|pgtest.go]]
+- [[_COMMUNITY_Handler|Handler]]
 - [[_COMMUNITY_Issue Tracker & Triage|Issue Tracker & Triage]]
 - [[_COMMUNITY_Ticket Workflow|Ticket Workflow]]
 - [[_COMMUNITY_Go Perf Alert Rules|Go Perf Alert Rules]]
@@ -138,7 +136,6 @@
 - [[_COMMUNITY_Identity comes from Discord OAuth; we store no passwords and send no email|Identity comes from Discord OAuth; we store no passwords and send no email]]
 - [[_COMMUNITY_The wire format stays flat and deliberately does not mirror the schema|The wire format stays flat and deliberately does not mirror the schema]]
 - [[_COMMUNITY_ADR-0005 On-demand browser sidecar|ADR-0005: On-demand browser sidecar]]
-- [[_COMMUNITY_sessions_test.go|sessions_test.go]]
 - [[_COMMUNITY_Bookmark Manager|Bookmark Manager]]
 - [[_COMMUNITY_triage-labels|triage-labels.md]]
 - [[_COMMUNITY_Cross-Ticket Contract|Cross-Ticket Contract]]
@@ -166,6 +163,8 @@
 - [[_COMMUNITY_Reviewer Subagent (opencode)|Reviewer Subagent (opencode)]]
 - [[_COMMUNITY_Finding Severity Rubric|Finding Severity Rubric]]
 - [[_COMMUNITY_Spec Compliance Review|Spec Compliance Review]]
+- [[_COMMUNITY_ADR-0011 Sightings — a Reader report defers a Poll where being wrong hurts only them|ADR-0011: Sightings — a Reader report defers a Poll where being wrong hurts only them]]
+- [[_COMMUNITY_ResponseWriter|ResponseWriter]]
 - [[_COMMUNITY_Why Use samberoops|Why Use samber/oops]]
 - [[_COMMUNITY_singleflight Cache Stampede Prevention|singleflight Cache Stampede Prevention]]
 - [[_COMMUNITY_Struct Field Alignment|Struct Field Alignment]]
@@ -220,10 +219,6 @@
 - [[_COMMUNITY_wayfinder mapticket mechanism|wayfinder map/ticket mechanism]]
 - [[_COMMUNITY_Triage labels canonical roles to tracker labels|Triage labels: canonical roles to tracker labels]]
 - [[_COMMUNITY_Canonical triage role labels (needs-triage ... wontfix)|Canonical triage role labels (needs-triage ... wontfix)]]
-- [[_COMMUNITY_Cinder (BookmarkManager Web UI design system)|Cinder (BookmarkManager Web UI design system)]]
-- [[_COMMUNITY_Heat is typographic ember reserved for unread chapters|Heat is typographic: ember reserved for unread chapters]]
-- [[_COMMUNITY_Design tokens (dark + light branches, no hardcoded hex)|Design tokens (dark + light branches, no hardcoded hex)]]
-- [[_COMMUNITY_Three type roles display serif  mono small-caps  sans|Three type roles: display serif / mono small-caps / sans]]
 - [[_COMMUNITY_aaria-label='All Chapter' priority pointer|a[aria-label='All Chapter'] priority pointer]]
 - [[_COMMUNITY_Research lightnovelworld chapter slug vs series slug|Research: lightnovelworld chapter slug vs series slug]]
 - [[_COMMUNITY_Gitea issue 77 (chapter vs series slug)|Gitea issue #77 (chapter vs series slug)]]
@@ -238,16 +233,16 @@
 - [[_COMMUNITY_Userscript CLAUDE guidance|Userscript CLAUDE guidance]]
 
 ## God Nodes (most connected - your core abstractions)
-1. `testConfig()` - 53 edges
-2. `newWebTestServer()` - 49 edges
-3. `newTestStore()` - 48 edges
-4. `newTestStore()` - 43 edges
+1. `newTestStore()` - 62 edges
+2. `testConfig()` - 55 edges
+3. `newWebTestServer()` - 49 edges
+4. `newTestStore()` - 44 edges
 5. `e()` - 33 edges
-6. `Open()` - 29 edges
-7. `Handler` - 29 edges
-8. `ne()` - 28 edges
-9. `De()` - 28 edges
-10. `Store` - 27 edges
+6. `Store` - 31 edges
+7. `Open()` - 31 edges
+8. `newTestPoller()` - 30 edges
+9. `Handler` - 29 edges
+10. `ne()` - 28 edges
 
 ## Surprising Connections (you probably didn't know these)
 - `el()` --indirect_call--> `c()`  [INFERRED]
@@ -267,45 +262,43 @@
 ## Hyperedges (group relationships)
 - **Batch Ticket Implementation Pipeline** — _claude_skills_implement_tickets_skill_implement_tickets, _omp_agents_ticket_implementer_ticket_implementer, _omp_agents_ticket_implementer_cr_spec, _omp_agents_ticket_implementer_cr_standards [INFERRED 0.85]
 - **Subagent-Driven Development Pipeline** — _opencode_agent_implementer_implementer, _opencode_agent_reviewer_reviewer, _opencode_agent_implementer_subagent_driven_development [INFERRED 0.85]
-- **Go HTML Template Family** — backend_internal_web_templates_app_doc, backend_internal_web_templates_card_doc, backend_internal_web_templates_list_doc, backend_internal_web_templates_chrome_doc, backend_internal_web_templates_login_doc, backend_internal_web_templates_setup_doc, backend_internal_web_templates_readers_doc, backend_internal_web_templates_icons_doc [INFERRED 0.95]
-- **htmx Fragment Swap Flow** — backend_internal_web_templates_app_doc, backend_internal_web_templates_card_doc, backend_internal_web_templates_chrome_doc, backend_internal_web_templates_setup_doc, backend_internal_web_templates_readers_doc [INFERRED 0.95]
 - **Backend owns the truth (single-writer ownership of shared facts)** — docs_adr_0003_series_shared_and_poll_owned_poll_owned_writes, docs_adr_0004_wire_format_does_not_mirror_the_schema_flat_wire_contract, docs_adr_0007_backend_hosts_cover_bytes_server_side_covers [INFERRED 0.85]
 - **Headless browser infrastructure (sidecar, on-demand, home deployment)** — docs_adr_0005_on_demand_browser_headless_shell, docs_adr_0005_on_demand_browser_cdp, docs_adr_0005_on_demand_browser_on_demand_start, docs_adr_0006_browser_on_the_home_machine_home_machine_rationale [INFERRED 0.85]
 - **lightnovelworld series-identity investigation and fix** — docs_research_lightnovelworld_chapter_vs_series_slug_issue_77, docs_research_lightnovelworld_chapter_vs_series_slug_unscoped_regex, docs_adr_0008_series_identity_is_discovered_not_derived_discovered_identity [INFERRED 0.85]
 
-## Communities (222 total, 154 thin omitted)
+## Communities (217 total, 150 thin omitted)
 
 ### Community 0 - "HTMX Library Internals"
 Cohesion: 0.08
 Nodes (101): A(), ae(), an(), at(), B(), be(), bn(), bt() (+93 more)
 
 ### Community 1 - "Cover Fetch Test Helpers"
-Cohesion: 0.10
-Nodes (84): floatPtr(), testConfig(), getCover(), Cookie, Handler, ResponseRecorder, T, TestListRendersAcquiredCover() (+76 more)
+Cohesion: 0.09
+Nodes (88): floatPtr(), testConfig(), getCover(), Cookie, Handler, ResponseRecorder, T, TestListRendersAcquiredCover() (+80 more)
 
 ### Community 2 - "Manga Userscript Adapters"
 Cohesion: 0.06
-Nodes (76): adapterFor(), anchorsFromDocument(), anchorsFromHTML(), apiDelete(), apiGet(), apiPut(), applyFabPos(), applyLatestChapterIfChanged() (+68 more)
+Nodes (77): adapterFor(), anchorsFromDocument(), anchorsFromHTML(), apiDelete(), apiGet(), apiPut(), applyFabPos(), armDwell() (+69 more)
 
 ### Community 3 - "Novel Userscript Adapters"
 Cohesion: 0.06
-Nodes (79): adapterFor(), anchorsFromDocument(), anchorsFromHTML(), apiDelete(), apiGet(), apiPut(), applyFabPos(), applyLatestChapterIfChanged() (+71 more)
+Nodes (78): adapterFor(), anchorsFromDocument(), anchorsFromHTML(), apiDelete(), apiGet(), apiPut(), applyFabPos(), applyLnwStaleRowRepair() (+70 more)
 
 ### Community 4 - "Series Acquisition Tests"
-Cohesion: 0.08
-Nodes (78): bookmarkNewKaganeSeries(), bookmarkNewNovelfullSeries(), bookmarkNewSeries(), Context, Store, T, newAcquirer(), readBookmark() (+70 more)
+Cohesion: 0.07
+Nodes (103): bookmarkNewKaganeSeries(), bookmarkNewNovelfullSeries(), bookmarkNewSeries(), Context, Store, T, newAcquirer(), readBookmark() (+95 more)
 
 ### Community 5 - "Bookmarks API Tests"
-Cohesion: 0.06
-Nodes (74): auth(), getBookmarks(), Handler, Request, Store, T, newTestServer(), newTestStore() (+66 more)
+Cohesion: 0.11
+Nodes (54): auth(), getBookmarks(), Handler, Request, Store, T, newTestServer(), newTestStore() (+46 more)
 
 ### Community 7 - "Cover & Acquire Internals"
 Cohesion: 0.08
-Nodes (37): Addr, Context, Store, WaitGroup, isInterstitial(), defaultCoverResolver(), fetchCoverBytes(), Client (+29 more)
+Nodes (31): fakeLanes, Context, Store, WaitGroup, isInterstitial(), fetchCoverBytes(), browserWakeDue(), fetcherFor() (+23 more)
 
 ### Community 8 - "System Architecture Concepts"
-Cohesion: 0.13
-Nodes (20): app.html — App Shell Template, Manga/Novel Library Switch, Bookmark Bucket Tabs, Confirm Row (Archive/Finish/Remove), card.html — Series Card Template, htmx /ui/* Mutation Endpoints, chrome.html — Out-of-Band Regions, Action Key (+12 more)
+Cohesion: 0.15
+Nodes (15): Confirm Row (Archive/Finish/Remove), card.html — Series Card Template, htmx /ui/* Mutation Endpoints, chrome.html — Out-of-Band Regions, Action Key, Brand Mark SVG, Continue Reading Strip, icons.html — Icon Sprite Template (+7 more)
 
 ### Community 9 - "Session Middleware"
 Cohesion: 0.08
@@ -316,25 +309,21 @@ Cohesion: 0.05
 Nodes (39): Test Helpers, Test Timeout, Basic Handler Test, HTTP Handler Testing, Query Parameters and Headers, Docker Compose Fixture, Integration Testing, SQL Schema Fixture (+31 more)
 
 ### Community 11 - "Store Tests"
-Cohesion: 0.14
-Nodes (45): scanSeries(), Store, T, newTestStore(), readLatestCheckedAt(), readSeries(), secondReader(), seedForCheck() (+37 more)
+Cohesion: 0.07
+Nodes (81): M, TestMain(), M, TestMain(), M, Main(), start(), URL() (+73 more)
 
 ### Community 12 - "Bookmarks API Handler"
 Cohesion: 0.08
 Nodes (32): Handler, Request, ResponseWriter, Store, Healthz(), writeJSON(), Auth(), compressible() (+24 more)
 
-### Community 13 - "Web UI Handlers"
-Cohesion: 0.14
-Nodes (18): currentLib(), currentTab(), filterBookmarks(), Client, HandlerFunc, Request, ResponseWriter, Store (+10 more)
+### Community 13 - "displayChapter"
+Cohesion: 0.09
+Nodes (36): Addr, Config, NewBrowserFetcher(), defaultCoverResolver(), Client, Context, NewCoverFetcher(), NewCoverFetcherWithResolver() (+28 more)
 
 ### Community 14 - "Go Error Handling"
 Cohesion: 0.06
 Nodes (33): Creating Errors, Custom Error Types, Custom types that wrap other errors, Decision table: which error strategy to use, Error Creation, Error String Conventions, Errors as Values, `errors.New` — static error messages (+25 more)
 
-### Community 15 - "CDP Browser Client"
-Cohesion: 0.06
-Nodes (56): awaitPromise(), browserConnectionLost(), classifyBrowserError(), comixRead(), comixSeriesPageURL(), Action, Context, Mutex (+48 more)
-
 ### Community 16 - "Cloudflare bot scoring and poll cadence — what is actually documented"
 Cohesion: 0.06
 Nodes (33): 1.1 The score itself, 1.2 The detection engines (Enterprise Bot Management), 1.3 Rate limiting is a separate product, 1. What a bot score is and what feeds it, 2.1 What each plan gets, 2.2 Bot Fight Mode specifics (the Free-plan product), 2.3 Does the free tier "score" continuously?, 2. The free-plan reality (+25 more)
@@ -372,8 +361,8 @@ Cohesion: 0.33
 Nodes (12): coverResponse(), Request, T, TestCoverFetcherCanonicalisesJpgAlias(), TestCoverFetcherFetchesPublicHTTPSImage(), TestCoverFetcherRefusesUnsafeDestinationsBeforeRequest(), TestCoverFetcherRejectsNonImage(), TestCoverFetcherRejectsOversizedBody() (+4 more)
 
 ### Community 26 - "Open"
-Cohesion: 0.40
-Nodes (5): Map of pointers for large, frequently updated structs, Memory Layout, Pointer receivers for large structs, Struct field alignment, Zero-size field at end of struct
+Cohesion: 0.06
+Nodes (57): awaitPromise(), browserConnectionLost(), classifyBrowserError(), comixRead(), comixSeriesPageURL(), Action, Context, Mutex (+49 more)
 
 ### Community 27 - "Find Skills Guide"
 Cohesion: 0.14
@@ -387,13 +376,9 @@ Nodes (14): Allocation Patterns, Backing Array Leaks, Direct indexing vs append,
 Cohesion: 0.22
 Nodes (9): Alerting rules (examples), CPU saturation, GC pressure, Goroutine leaks, Grafana Dashboards, Memory leaks, Prometheus Metrics for Go, PromQL Queries for Performance Diagnosis (+1 more)
 
-### Community 31 - "Store"
-Cohesion: 0.12
-Nodes (3): coverRelativePath(), coverSourceAddress(), Store
-
-### Community 32 - "Open"
-Cohesion: 0.14
-Nodes (20): applyMigration(), displayChapter(), migrate(), Open(), refreshOwnerToken(), seedOwner(), TestCoverIsContentAddressedOnFilesystem(), TestCoverPersistsAcrossReopen() (+12 more)
+### Community 30 - "AGENTS.md"
+Cohesion: 0.40
+Nodes (5): Map of pointers for large, frequently updated structs, Memory Layout, Pointer receivers for large structs, Struct field alignment, Zero-size field at end of struct
 
 ### Community 33 - "Go Testing Guide"
 Cohesion: 0.20
@@ -423,9 +408,9 @@ Nodes (6): Design Health Score, Design Specificity Verdict, Minor Observations,
 Cohesion: 0.29
 Nodes (6): Design Health Score, Design Specificity Verdict, Minor Observations, Persona Red Flags, Priority Issues, Questions to Consider
 
-### Community 42 - "pgtest.go"
-Cohesion: 0.18
-Nodes (12): M, TestMain(), M, TestMain(), M, Main(), start(), URL() (+4 more)
+### Community 41 - "Handler"
+Cohesion: 0.05
+Nodes (25): coverRelativePath(), coverSourceAddress(), displayChapter(), Store, scanSeries(), currentLib(), currentTab(), filterBookmarks() (+17 more)
 
 ### Community 45 - "Go Perf Alert Rules"
 Cohesion: 0.50
@@ -535,9 +520,13 @@ Nodes (3): Consequence, The wire format stays flat and deliberately does not mir
 Cohesion: 0.50
 Nodes (3): ADR-0005: On-demand browser sidecar, Constraints, Decision
 
-### Community 125 - "sessions_test.go"
-Cohesion: 0.48
-Nodes (6): T, TestCreateAndGetSession(), TestDeleteSessionIsPerReader(), TestDeleteSessionRevokes(), TestExpiredSessionIsGone(), TestGetSessionUnknownID()
+### Community 154 - "ADR-0011: Sightings — a Reader report defers a Poll where being wrong hurts only them"
+Cohesion: 0.33
+Nodes (5): ADR-0011: Sightings — a Reader report defers a Poll where being wrong hurts only them, Constraints preserved, Decision, Tradeoffs and rejections, Why
+
+### Community 156 - "ResponseWriter"
+Cohesion: 0.18
+Nodes (13): AdminPatterns(), HandlerFunc, Request, ResponseWriter, Time, Handler, readerPathID(), since() (+5 more)
 
 ### Community 273 - "AGENTS.md"
 Cohesion: 0.50
@@ -546,22 +535,22 @@ Nodes (3): Live URL shapes (verified 2026-07-26, may drift — re-check against
 ## Knowledge Gaps
 - **524 isolated node(s):** `bookmarkmanager/backend`, `ctxKey`, `loginView`, `ctxKey`, `test` (+519 more)
   These have ≤1 connection - possible missing edges or undocumented components.
-- **154 thin communities (<3 nodes) omitted from report** — run `graphify query` to explore isolated nodes.
+- **150 thin communities (<3 nodes) omitted from report** — run `graphify query` to explore isolated nodes.
 
 ## Suggested Questions
 _Questions this graph is uniquely positioned to answer:_
 
-- **Why does `New()` connect `Series Acquisition Tests` to `Open`, `Bookmarks API Tests`, `Cover & Acquire Internals`, `Session Middleware`, `Web UI Handlers`?**
-  _High betweenness centrality (0.045) - this node is a cross-community bridge._
-- **Why does `Open()` connect `Open` to `Cover Fetch Test Helpers`, `Series Acquisition Tests`, `Bookmarks API Tests`, `pgtest.go`, `Store Tests`, `Store`?**
-  _High betweenness centrality (0.033) - this node is a cross-community bridge._
-- **Why does `newRouter()` connect `Bookmarks API Tests` to `Cover Fetch Test Helpers`, `Bookmarks API Handler`, `Series Acquisition Tests`?**
-  _High betweenness centrality (0.027) - this node is a cross-community bridge._
-- **Are the 47 inferred relationships involving `testConfig()` (e.g. with `TestListRendersAcquiredCover()` and `TestPublicCoverNeverEchoesNonImage()`) actually correct?**
-  _`testConfig()` has 47 INFERRED edges - model-reasoned connections that need verification._
+- **Why does `Open()` connect `Store Tests` to `Cover Fetch Test Helpers`, `Series Acquisition Tests`, `Bookmarks API Tests`, `Handler`, `displayChapter`?**
+  _High betweenness centrality (0.057) - this node is a cross-community bridge._
+- **Why does `New()` connect `Series Acquisition Tests` to `Bookmarks API Tests`, `Cover & Acquire Internals`, `Handler`, `Session Middleware`, `Store Tests`, `displayChapter`, `ResponseWriter`?**
+  _High betweenness centrality (0.051) - this node is a cross-community bridge._
+- **Why does `newRouter()` connect `Bookmarks API Tests` to `Cover Fetch Test Helpers`, `Series Acquisition Tests`, `Bookmarks API Handler`, `displayChapter`, `ResponseWriter`?**
+  _High betweenness centrality (0.031) - this node is a cross-community bridge._
+- **Are the 25 inferred relationships involving `newTestStore()` (e.g. with `TestAcquireDoesNotBlockTheWrite()` and `TestAcquireFailureLeavesTheBookmarkIntact()`) actually correct?**
+  _`newTestStore()` has 25 INFERRED edges - model-reasoned connections that need verification._
+- **Are the 48 inferred relationships involving `testConfig()` (e.g. with `TestListRendersAcquiredCover()` and `TestPublicCoverNeverEchoesNonImage()`) actually correct?**
+  _`testConfig()` has 48 INFERRED edges - model-reasoned connections that need verification._
 - **Are the 8 inferred relationships involving `newWebTestServer()` (e.g. with `TestListRendersAcquiredCover()` and `TestPublicCoverRejectsUnknownAddress()`) actually correct?**
   _`newWebTestServer()` has 8 INFERRED edges - model-reasoned connections that need verification._
-- **Are the 12 inferred relationships involving `newTestStore()` (e.g. with `TestAcquireDoesNotBlockTheWrite()` and `TestAcquireFailureLeavesTheBookmarkIntact()`) actually correct?**
-  _`newTestStore()` has 12 INFERRED edges - model-reasoned connections that need verification._
 - **What connects `bookmarkmanager/backend`, `ctxKey`, `loginView` to the rest of the system?**
-  _557 weakly-connected nodes found - possible documentation gaps or missing edges._
+  _556 weakly-connected nodes found - possible documentation gaps or missing edges._

graphify-out/manifest.json

@@ -25,8 +25,8 @@
     "semantic_hash": "dac242903b0e98c3e4395159d609e08e"
   },
   "backend/main.go": {
-    "mtime": 1786859325.126449,
-    "ast_hash": "4ad77c286522f97d14b6009ff37118e5",
+    "mtime": 1786886056.023822,
+    "ast_hash": "d5a50b03438d7c120079d40cc578462b",
     "semantic_hash": ""
   },
   "skills-lock.json": {
@@ -35,8 +35,8 @@
     "semantic_hash": "4a94ac85bad6bce330d085bcc0ae3ffd"
   },
   "userscript/manga-bookmark.user.js": {
-    "mtime": 1786499529.779988,
-    "ast_hash": "1f8bcddd3632d709f058a8401af8f127",
+    "mtime": 1786886056.0389624,
+    "ast_hash": "4e79684942234b26f4a1fb03fccd6d35",
     "semantic_hash": ""
   },
   ".agents/skills/find-skills/SKILL.md": {
@@ -145,12 +145,12 @@
     "semantic_hash": ""
   },
   "DEPLOY.md": {
-    "mtime": 1786859620.9977603,
+    "mtime": 1786861012.026504,
     "ast_hash": "b7c2f813aded562ee9291c9baed795ad",
     "semantic_hash": ""
   },
   "README.md": {
-    "mtime": 1786859273.3238454,
+    "mtime": 1786861012.026504,
     "ast_hash": "81af12a0a2d43e791efd030b5f4d6cbc",
     "semantic_hash": ""
   },
@@ -160,7 +160,7 @@
     "semantic_hash": "0751998a532297b8ac507a01ec48dc31"
   },
   "docker-compose.yml": {
-    "mtime": 1786859258.6255276,
+    "mtime": 1786861012.026504,
     "ast_hash": "d3b53a8f42a8e0acb4fc4306ea42c093",
     "semantic_hash": ""
   },
@@ -170,12 +170,12 @@
     "semantic_hash": "e51077b6a7f1f67afc748f1a32a1557d"
   },
   "backend/web_test.go": {
-    "mtime": 1786216141.700644,
-    "ast_hash": "8f1b093b59eb1ed81bc7fc0c22495c50",
-    "semantic_hash": "8f1b093b59eb1ed81bc7fc0c22495c50"
+    "mtime": 1786891437.925184,
+    "ast_hash": "74aed7f5a5b196d2b860cd6a34266ec6",
+    "semantic_hash": ""
   },
   "backend/main_test.go": {
-    "mtime": 1786859172.6449091,
+    "mtime": 1786863966.7091317,
     "ast_hash": "0a5d4dbdc770b40c329ccccc899b59f4",
     "semantic_hash": ""
   },
@@ -220,24 +220,24 @@
     "semantic_hash": ""
   },
   "docs/design-system.md": {
-    "mtime": 1786022513.9623306,
-    "ast_hash": "421cd7e57f02d4b467f120ca6ddd7b6a",
-    "semantic_hash": "421cd7e57f02d4b467f120ca6ddd7b6a"
+    "mtime": 1786886056.0313923,
+    "ast_hash": "3bd39932997c8e245508874194db4e49",
+    "semantic_hash": ""
   },
   "backend/api_test.go": {
-    "mtime": 1786499529.7651505,
-    "ast_hash": "8e4b9293bc2e45ee3f42027315594fd5",
+    "mtime": 1786886056.016252,
+    "ast_hash": "b64372df5429fb14e48b37b3bab10402",
     "semantic_hash": ""
   },
   "backend/cover_test.go": {
-    "mtime": 1786363889.552731,
-    "ast_hash": "c7e313d6c92eb28e6d370e5e89035984",
-    "semantic_hash": "c7e313d6c92eb28e6d370e5e89035984"
+    "mtime": 1786886056.016252,
+    "ast_hash": "fd6b3f6ef46bd17b0241d104b6e5bdf6",
+    "semantic_hash": ""
   },
   "backend/internal/api/handlers.go": {
-    "mtime": 1786363889.552731,
-    "ast_hash": "59e6b8767ab19839bb8f82891a7e4616",
-    "semantic_hash": "59e6b8767ab19839bb8f82891a7e4616"
+    "mtime": 1786886056.016252,
+    "ast_hash": "ae4f3b961450f06a06e0632eb273a5b2",
+    "semantic_hash": ""
   },
   "backend/internal/httpmw/middleware.go": {
     "mtime": 1786216141.672644,
@@ -245,13 +245,13 @@
     "semantic_hash": "385b36f58488b7e6d93eb6d6034e9ee3"
   },
   "backend/internal/latest/browser.go": {
-    "mtime": 1786859355.8677974,
-    "ast_hash": "75f34a974568d122681939dd297944a2",
+    "mtime": 1786889854.5578685,
+    "ast_hash": "b65f3693db77c69ef0a6247fd75118bc",
     "semantic_hash": ""
   },
   "backend/internal/latest/browser_test.go": {
-    "mtime": 1786857336.6414917,
-    "ast_hash": "800fa6aa471ada054a3c48943ad17ab7",
+    "mtime": 1786889854.5578685,
+    "ast_hash": "118aba3d794b9faf893c45e58298e11a",
     "semantic_hash": ""
   },
   "backend/internal/latest/fetch.go": {
@@ -260,18 +260,18 @@
     "semantic_hash": ""
   },
   "backend/internal/latest/poller.go": {
-    "mtime": 1786860083.6713927,
-    "ast_hash": "be728405cde3df49baf72bd7837f2971",
+    "mtime": 1786891405.415882,
+    "ast_hash": "54f6eec9d2090c7713f502c8553063a2",
     "semantic_hash": ""
   },
   "backend/internal/latest/poller_test.go": {
-    "mtime": 1786860168.103984,
-    "ast_hash": "5dba515d28c0523500c1ceb581a54e58",
+    "mtime": 1786891462.5665002,
+    "ast_hash": "512806a9c6e15036a75f01bf5577c20b",
     "semantic_hash": ""
   },
   "backend/internal/latest/sites.go": {
-    "mtime": 1786860007.8224697,
-    "ast_hash": "9b90f9b710ccbd0d0a0a6a0dd721ff3c",
+    "mtime": 1786886056.0200372,
+    "ast_hash": "5786000dd0dfd5b4b3bd2b87b1fc100b",
     "semantic_hash": ""
   },
   "backend/internal/latest/sites_test.go": {
@@ -340,13 +340,13 @@
     "semantic_hash": "0b6764a0ee20f5cb7748eecd31a1d220"
   },
   "backend/internal/store/store.go": {
-    "mtime": 1786860012.3431706,
-    "ast_hash": "c62e73142386c58ab833d404d0c24dc4",
+    "mtime": 1786886056.0200372,
+    "ast_hash": "34f55617b7409f03f02e925bec92fac0",
     "semantic_hash": ""
   },
   "backend/internal/store/store_test.go": {
-    "mtime": 1786858248.9426548,
-    "ast_hash": "039729554517960d1ae98f8409baf4ba",
+    "mtime": 1786886056.0200372,
+    "ast_hash": "16f69d97eb63bcec7409294466642411",
     "semantic_hash": ""
   },
   "backend/internal/userscript/userscript.go": {
@@ -380,14 +380,14 @@
     "semantic_hash": "19a573773be4ca22570ca2f8543120c5"
   },
   "backend/internal/web/web.go": {
-    "mtime": 1786363889.5678573,
-    "ast_hash": "8308949c658d3a08ce1c3cdbea6a907c",
-    "semantic_hash": "8308949c658d3a08ce1c3cdbea6a907c"
+    "mtime": 1786886056.023822,
+    "ast_hash": "b051f2de214c4b253ee09fbbdb8ebb60",
+    "semantic_hash": ""
   },
   "backend/reader_credential_test.go": {
-    "mtime": 1786216141.700644,
-    "ast_hash": "2a751ea6d9c06635aa3179db0aef1b2b",
-    "semantic_hash": "2a751ea6d9c06635aa3179db0aef1b2b"
+    "mtime": 1786886056.023822,
+    "ast_hash": "0c93de387af595901c43b6bdb3bed8cc",
+    "semantic_hash": ""
   },
   "chrome/entrypoint.sh": {
     "mtime": 1786363889.5678573,
@@ -395,8 +395,8 @@
     "semantic_hash": "8008a187690764436540fab47ba0cfcc"
   },
   "userscript/novel-bookmark.user.js": {
-    "mtime": 1786499529.779988,
-    "ast_hash": "834effb0821f8d6c9f57f6554a5db462",
+    "mtime": 1786886056.0389624,
+    "ast_hash": "36c81462919719f0e053ca5d633a243a",
     "semantic_hash": ""
   },
   "userscript/test/novel-logic.test.js": {
@@ -415,7 +415,7 @@
     "semantic_hash": "e44a2f6f624db044e19508bc5ab05592"
   },
   "CONTEXT.md": {
-    "mtime": 1786859395.4497814,
+    "mtime": 1786861012.022683,
     "ast_hash": "4aafbce0b046e6e34734fb414df818ce",
     "semantic_hash": ""
   },
@@ -425,19 +425,19 @@
     "semantic_hash": "6c6f3e4c4c2f57867894280bce728c50"
   },
   "backend/AGENTS.md": {
-    "mtime": 1786860230.7890837,
-    "ast_hash": "7ceec7c4576f6e91eaf02c200a0dd1b3",
+    "mtime": 1786891513.6486945,
+    "ast_hash": "b4233ebc5ff905b701ded9427277ad8c",
     "semantic_hash": ""
   },
   "backend/CLAUDE.md": {
-    "mtime": 1786860230.7890837,
-    "ast_hash": "7ceec7c4576f6e91eaf02c200a0dd1b3",
+    "mtime": 1786891513.6486945,
+    "ast_hash": "b4233ebc5ff905b701ded9427277ad8c",
     "semantic_hash": ""
   },
   "backend/internal/web/templates/app.html": {
-    "mtime": 1786216141.692644,
-    "ast_hash": "3965e20e204afb71ba2a3aa86cb7c61c",
-    "semantic_hash": "3965e20e204afb71ba2a3aa86cb7c61c"
+    "mtime": 1786886056.023822,
+    "ast_hash": "99d3e1139042d0eb61627155dddb3843",
+    "semantic_hash": ""
   },
   "backend/internal/web/templates/card.html": {
     "mtime": 1786363889.5678573,
@@ -465,9 +465,9 @@
     "semantic_hash": "bcc3101498a66cf8b79f9d97c6c9cd6b"
   },
   "backend/internal/web/templates/readers.html": {
-    "mtime": 1786216141.696644,
-    "ast_hash": "c5034e76bd20a705d2799cb5ecb328f0",
-    "semantic_hash": "c5034e76bd20a705d2799cb5ecb328f0"
+    "mtime": 1786886056.023822,
+    "ast_hash": "2b1cbb24d6185e48561966db1af04ba4",
+    "semantic_hash": ""
   },
   "backend/internal/web/templates/setup.html": {
     "mtime": 1786216141.696644,
@@ -570,7 +570,7 @@
     "semantic_hash": "60d9eb7c59a3751baf4f31c7655217e7"
   },
   "backend/internal/latest/acquire.go": {
-    "mtime": 1786859346.3297389,
+    "mtime": 1786861012.026504,
     "ast_hash": "d605e3c94a62fc7787efbc139696b9d2",
     "semantic_hash": ""
   },
@@ -615,7 +615,7 @@
     "semantic_hash": ""
   },
   "backend/internal/latest/read.go": {
-    "mtime": 1786859355.8679621,
+    "mtime": 1786861012.026504,
     "ast_hash": "9f039cc3ad74f803d7621f7ef4157bf2",
     "semantic_hash": ""
   },
@@ -630,8 +630,48 @@
     "semantic_hash": ""
   },
   "docs/adr/0010-poll-lanes-per-site-pace.md": {
-    "mtime": 1786860214.4637265,
+    "mtime": 1786861012.026504,
     "ast_hash": "dc19d75f034ca920d93b9c71e6ca28e6",
     "semantic_hash": ""
+  },
+  "backend/internal/latest/status.go": {
+    "mtime": 1786891396.3216066,
+    "ast_hash": "5893c77b117a5bcec3a4583aa51e7f42",
+    "semantic_hash": ""
+  },
+  "backend/internal/store/migrations/0010_reader_sightings.sql": {
+    "mtime": 1786886056.0200372,
+    "ast_hash": "a72c08c63fad530df3c793d16edfa385",
+    "semantic_hash": ""
+  },
+  "backend/internal/web/admin.go": {
+    "mtime": 1786891411.0618205,
+    "ast_hash": "e02249496b57096cf1929f9cd0e35c3e",
+    "semantic_hash": ""
+  },
+  "backend/internal/web/templates/admin.html": {
+    "mtime": 1786886056.023822,
+    "ast_hash": "f04ea1cb01369d53053eac489e796faa",
+    "semantic_hash": ""
+  },
+  "backend/internal/web/templates/lanes.html": {
+    "mtime": 1786891416.6118941,
+    "ast_hash": "0e96f66560bac29713a71ec31139d25e",
+    "semantic_hash": ""
+  },
+  "backend/internal/latest/sighting_test.go": {
+    "mtime": 1786886056.0200372,
+    "ast_hash": "3b1372bbeeb538b73f86f57da210b4cc",
+    "semantic_hash": ""
+  },
+  "backend/internal/store/migrations/0011_series_sightings.sql": {
+    "mtime": 1786886056.0200372,
+    "ast_hash": "d0ade928a6e951eb179e4d0255cca526",
+    "semantic_hash": ""
+  },
+  "docs/adr/0011-sighting-deferral-trust-model.md": {
+    "mtime": 1786886056.0313923,
+    "ast_hash": "0b6ca704f62185c9d629320f2d8475b5",
+    "semantic_hash": ""
   }
 }

userscript/manga-bookmark.user.js

@@ -905,27 +905,37 @@
     }
   }
 
-  // Records the newest chapter a site has published. Silent: this fires from
+  // Reports the newest chapter a site has published. Silent: this fires from
   // page visits and background checks the user did not ask for, and it never
   // reorders the list — updated_at is a candidate the server discards unless
   // reading progress moved.
-  async function applyLatestChapterIfChanged(existing, latest) {
+  //
+  // An unchanged number is still sent. It is the read that lets the backend
+  // skip its own poll of this series (a Sighting, issue #103), so the common
+  // case — visiting a series with nothing new — is exactly the one worth
+  // reporting. Only the local write and the re-render are skipped.
+  async function reportLatestChapter(existing, latest) {
     if (!existing || !latest) return;
-    if (existing.latest_chapter_num === latest.num) return;
-    const bm = Object.assign({}, existing, {
-      latest_chapter: latest.label,
-      latest_chapter_num: latest.num,
-      updated_at: Date.now(),
-    });
-    upsertLocal(bm);
-    render();
+    const changed = existing.latest_chapter_num !== latest.num;
+    let bm = existing;
+    if (changed) {
+      bm = Object.assign({}, existing, {
+        latest_chapter: latest.label,
+        latest_chapter_num: latest.num,
+        updated_at: Date.now(),
+      });
+      upsertLocal(bm);
+      render();
+    }
     // A queued write owns this row; the drain sends latest_chapter
     // with it, carrying the correct bucket.
     if (queueGet(bm.key)) return;
     try {
       const saved = await apiPut(bm.key, bm);
-      upsertLocal(saved);
-      render();
+      if (changed) {
+        upsertLocal(saved);
+        render();
+      }
     } catch (e) {
       /* offline — the local cache still shows it, retried on a later visit */
     }
@@ -937,7 +947,7 @@
     if (p.type !== "series") return;
     const existing = state.byKey[keyOf(p)];
     if (!existing) return;
-    applyLatestChapterIfChanged(
+    reportLatestChapter(
       existing,
       computeLatestChapter(p.site, anchorsFromDocument(document), p.seriesId)
     );
@@ -977,7 +987,7 @@
           const html = await res.text();
           latest = computeLatestChapter(bm.site, anchorsFromHTML(html), bm.series_id);
         }
-        await applyLatestChapterIfChanged(state.byKey[bm.key] || bm, latest);
+        await reportLatestChapter(state.byKey[bm.key] || bm, latest);
       } catch (e) {
         /* offline or blocked — try again after the throttle window */
       }

userscript/novel-bookmark.user.js

@@ -809,27 +809,37 @@
     }
   }
 
-  // Records the newest chapter a site has published. Silent: this fires from
+  // Reports the newest chapter a site has published. Silent: this fires from
   // page visits and background checks the user did not ask for, and it never
   // reorders the list — updated_at is a candidate the server discards unless
   // reading progress moved.
-  async function applyLatestChapterIfChanged(existing, latest) {
+  //
+  // An unchanged number is still sent. It is the read that lets the backend
+  // skip its own poll of this series (a Sighting, issue #103), so the common
+  // case — visiting a series with nothing new — is exactly the one worth
+  // reporting. Only the local write and the re-render are skipped.
+  async function reportLatestChapter(existing, latest) {
     if (!existing || !latest) return;
-    if (existing.latest_chapter_num === latest.num) return;
-    const bm = Object.assign({}, existing, {
-      latest_chapter: latest.label,
-      latest_chapter_num: latest.num,
-      updated_at: Date.now(),
-    });
-    upsertLocal(bm);
-    render();
+    const changed = existing.latest_chapter_num !== latest.num;
+    let bm = existing;
+    if (changed) {
+      bm = Object.assign({}, existing, {
+        latest_chapter: latest.label,
+        latest_chapter_num: latest.num,
+        updated_at: Date.now(),
+      });
+      upsertLocal(bm);
+      render();
+    }
     // A queued write owns this row; the drain sends latest_chapter
     // with it, carrying the correct bucket.
     if (queueGet(bm.key)) return;
     try {
       const saved = await apiPut(bm.key, bm);
-      upsertLocal(saved);
-      render();
+      if (changed) {
+        upsertLocal(saved);
+        render();
+      }
     } catch (e) {
       /* offline — the local cache still shows it, retried on a later visit */
     }
@@ -841,7 +851,7 @@
     if (p.type !== "series") return;
     const existing = state.byKey[keyOf(p)];
     if (!existing) return;
-    applyLatestChapterIfChanged(
+    reportLatestChapter(
       existing,
       computeLatestChapter(p.site, anchorsFromDocument(document), p.seriesId)
     );
@@ -883,7 +893,7 @@
         if (!res.ok) continue;
         const html = await res.text();
         const latest = computeLatestChapter(bm.site, anchorsFromHTML(html), bm.series_id);
-        await applyLatestChapterIfChanged(state.byKey[bm.key] || bm, latest);
+        await reportLatestChapter(state.byKey[bm.key] || bm, latest);
       } catch (e) {
         /* offline or blocked — try again after the throttle window */
       }