fix(web): show paste box to any connected user, not only on an empty feed

hasConnected was computed only inside the buckets.empty() branch (it was added
for the empty-state copy), so a connected user WITH videos got hasConnected=false
and never saw the paste box (#2-regression of the v0.12.0 paste UI). Compute it
on every list render. Test: connected user with a non-empty feed sees the box.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -60,8 +60,14 @@ These caused real mistakes that were caught and corrected; the corrections are l
   stores, and sinks are adapters. Adding a video provider or a sink = a new adapter implementing
   the interface, nothing in the engine changes. This is what keeps "standalone vs homelab" a
   wiring choice (ADR-003).
-- **BDD.** The `docs/use-cases/*.feature` files are the behavior spec. New behavior gets a
-  scenario; the use-case core is tested through fake adapters, not live YouTube/brain.
+- **BDD.** The `docs/use-cases/*.feature` files are the behavior spec (design records — there is
+  no godog runner). New behavior gets a scenario; the use-case core is tested through fake
+  adapters, not live YouTube/brain. A name-coverage gate (`test/acceptance/scenario_coverage_test.go`,
+  `TestScenarioCoverage`) keeps the two from drifting: every non-`@pending` scenario must be
+  mapped to an existing Go test in `scenarioCoverage`. When you add a scenario, either map it to
+  its covering test or tag it `@pending` in the `.feature` with a one-line reason. It checks the
+  *link*, not that the test exercises the scenario — that's the deliberate trade for not running
+  godog (see issue #5 / the BDD-runner decision).
 
 ## Skills (engineering discipline)
 
@@ -79,7 +85,7 @@ Skills live in the canonical library `mathias/skills` and are wired into this re
 
 ## Current build state (start here for the first task)
 
-The repo is **green and shipping** — last tag `v0.4.0`. `task check` passes (fmt, vet, lint,
+The repo is **green and shipping** — last tag `v0.9.0`. `task check` passes (fmt, vet, lint,
 `go test -p 1 ./...`). Go is `1.26.1` (see `go.mod`).
 
 - Clean Architecture core is implemented: `internal/domain` (entities), `internal/ports`

README.md

@@ -75,8 +75,10 @@ password or Google); a new Dex subject is routed to `/register` to create a Tapi
 Stage 1 is multi-user: each user connects their own YouTube account from the browser and
 manages their own summaries under DB-enforced RLS isolation. When `TAPIR_DISCOVERY_INTERVAL`
 is set (e.g. `2h`), the serve process runs a scheduled discovery pass for every registered
-user automatically — no CronJob required. See `docs/homelab-integration.md` for the full
-config reference.
+user automatically — no CronJob required. In auto mode only videos published within
+`TAPIR_AUTO_SUMMARIZE_WINDOW` (default ~7d, ADR-020) are summarised automatically; older videos
+are listed and summarised on demand, so a large back-catalogue doesn't keep re-driving the
+caption rate gate. See `docs/homelab-integration.md` for the full config reference.
 
 ### Headless on koala
 

cmd/tapir/discovery.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"context"
+	"log/slog"
+	"sync"
+
+	"gitea.d-ma.be/mathias/tapir/internal/runner"
+)
+
+// discoveryRunner runs one user's discovery pass.
+type discoveryRunner func(ctx context.Context, userID string) (runner.Stats, error)
+
+// serialize wraps run so calls never overlap: every discovery pass — scheduled
+// or connect-triggered (#6) — acquires the same lock, preserving the
+// one-fetcher-at-a-time invariant the scheduler relies on (ADR-018, the
+// single-replica assumption). Locking is per-user, so a connect-triggered pass
+// interleaves between the scheduler's users instead of waiting for a whole pass.
+func serialize(mu *sync.Mutex, run discoveryRunner) discoveryRunner {
+	return func(ctx context.Context, userID string) (runner.Stats, error) {
+		mu.Lock()
+		defer mu.Unlock()
+		return run(ctx, userID)
+	}
+}
+
+// discoveryTrigger fires an out-of-band discovery pass for one user without
+// blocking the caller (the connect HTTP handler). The pass runs on the server's
+// long-lived ctx — not the request ctx — so it survives the post-connect
+// redirect. run is the serialized runner, so a trigger never overlaps the
+// scheduler. Satisfies web.DiscoveryTrigger.
+type discoveryTrigger struct {
+	ctx context.Context
+	run discoveryRunner
+	// onboard, when set, runs after the discovery pass to summarize a capped number
+	// of the user's newest videos (Feature 1). Optional.
+	onboard func(ctx context.Context, userID string)
+	log     *slog.Logger
+}
+
+func (t *discoveryTrigger) Enqueue(userID string) {
+	go func() {
+		if _, err := t.run(t.ctx, userID); err != nil {
+			t.log.Warn("discovery: connect-triggered pass had errors", "user", userID, "err", err)
+		}
+		if t.onboard != nil {
+			t.onboard(t.ctx, userID)
+		}
+	}()
+}

cmd/tapir/discovery_test.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"gitea.d-ma.be/mathias/tapir/internal/runner"
+)
+
+// serialize must guarantee at most one discovery pass runs at a time, so a
+// connect-triggered pass never fetches concurrently with the scheduler.
+func TestSerializeRunsOneAtATime(t *testing.T) {
+	var active, maxActive int32
+	run := func(_ context.Context, _ string) (runner.Stats, error) {
+		n := atomic.AddInt32(&active, 1)
+		for { // record the high-water mark of concurrent runs
+			m := atomic.LoadInt32(&maxActive)
+			if n <= m || atomic.CompareAndSwapInt32(&maxActive, m, n) {
+				break
+			}
+		}
+		time.Sleep(2 * time.Millisecond)
+		atomic.AddInt32(&active, -1)
+		return runner.Stats{}, nil
+	}
+
+	s := serialize(&sync.Mutex{}, run)
+	var wg sync.WaitGroup
+	for i := 0; i < 20; i++ {
+		wg.Add(1)
+		go func(i int) { defer wg.Done(); _, _ = s(context.Background(), fmt.Sprintf("u%d", i)) }(i)
+	}
+	wg.Wait()
+
+	require.Equal(t, int32(1), atomic.LoadInt32(&maxActive),
+		"serialize must run at most one pass at a time")
+}
+
+// Enqueue runs the user's pass out-of-band (non-blocking) on the trigger's ctx.
+func TestDiscoveryTriggerEnqueueRunsUser(t *testing.T) {
+	done := make(chan string, 1)
+	run := func(_ context.Context, userID string) (runner.Stats, error) {
+		done <- userID
+		return runner.Stats{}, nil
+	}
+	tr := &discoveryTrigger{ctx: context.Background(), run: run, log: quietLog()}
+
+	tr.Enqueue("u1")
+
+	select {
+	case got := <-done:
+		require.Equal(t, "u1", got)
+	case <-time.After(2 * time.Second):
+		t.Fatal("Enqueue did not run the user's pass")
+	}
+}

cmd/tapir/main.go

@@ -20,6 +20,7 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
+	"sync"
 	"time"
 
 	"gitea.d-ma.be/mathias/tapir/internal/adapters/secrets"
@@ -209,7 +210,10 @@ func cmdServe(ctx context.Context, log *slog.Logger) error {
 			ClientSecret: cfg.YTClientSecret,
 			RedirectURL:  cfg.YTConnectRedirectURL,
 		}, secretStore, st, log)
-		log.Info("web youtube connect enabled", "redirect", cfg.YTConnectRedirectURL)
+		// Paste-a-URL (Feature 2): same YouTube credentials, per-user adapter built
+		// per request. Mounting the /paste route keys off app.Fetcher being set.
+		app.Fetcher = videoFetcher{cfg: cfg, secrets: secretStore}
+		log.Info("web youtube connect + paste enabled", "redirect", cfg.YTConnectRedirectURL)
 	}
 
 	// Immediate summarization for the web "Summarize" button. When the engine can
@@ -238,13 +242,44 @@ func cmdServe(ctx context.Context, log *slog.Logger) error {
 	if cfg.DiscoveryInterval > 0 {
 		log.Info("scheduled discovery enabled", "interval", cfg.DiscoveryInterval, "fetch_rate", cfg.FetchRate)
 		log.Warn("scheduled discovery assumes a SINGLE replica — running serve at >1 replica double-runs discovery (ADR-018)")
-		runUser := func(ctx context.Context, userID string) (runner.Stats, error) {
+		rawRunUser := func(ctx context.Context, userID string) (runner.Stats, error) {
 			r, err := buildUserRunner(cfg, st, secretStore, userID, log)
 			if err != nil {
 				return runner.Stats{}, err
 			}
 			return r.RunOnce(ctx)
 		}
+		// One lock shared by the scheduler and connect-triggered passes (#6) so
+		// they never fetch concurrently — the single-fetcher invariant (ADR-018).
+		runUser := serialize(&sync.Mutex{}, rawRunUser)
+		// Onboarding burst (Feature 1): after the connect-triggered discovery pass,
+		// summarize up to OnboardSummarizeCount of the user's NEWEST unsummarized
+		// videos so a fresh account gets real summaries in its first session. Hard
+		// cap; explicit, so it bypasses the recency window — but every fetch still
+		// goes through globalFetchGate via the Processor. No-op when disabled
+		// (count 0) or queue-only (no Processor).
+		onboard := func(ctx context.Context, userID string) {
+			if cfg.OnboardSummarizeCount <= 0 || app.Processor == nil {
+				return
+			}
+			ids, err := st.NewestUnsummarizedVideoIDs(ctx, userID, cfg.OnboardSummarizeCount)
+			if err != nil {
+				log.Warn("onboarding: list newest unsummarized", "user", userID, "err", err)
+				return
+			}
+			for _, id := range ids {
+				if err := app.Processor.ProcessVideo(ctx, userID, id); err != nil {
+					log.Warn("onboarding: summarize", "user", userID, "video", id, "err", err)
+				}
+			}
+			if len(ids) > 0 {
+				log.Info("onboarding burst complete", "user", userID, "summarized", len(ids), "cap", cfg.OnboardSummarizeCount)
+			}
+		}
+		if app.Connect != nil {
+			app.Connect.Discovery = &discoveryTrigger{ctx: ctx, run: runUser, onboard: onboard, log: log}
+			log.Info("connect-triggered discovery enabled", "onboard_cap", cfg.OnboardSummarizeCount)
+		}
 		go runScheduler(ctx, cfg.DiscoveryInterval, st, runUser, log)
 	} else {
 		log.Info("scheduled discovery disabled (TAPIR_DISCOVERY_INTERVAL unset or 0)")

cmd/tapir/processor.go

@@ -11,9 +11,29 @@ import (
 	"gitea.d-ma.be/mathias/tapir/internal/adapters/youtube"
 	"gitea.d-ma.be/mathias/tapir/internal/config"
 	"gitea.d-ma.be/mathias/tapir/internal/domain"
+	"gitea.d-ma.be/mathias/tapir/internal/ports"
 	"gitea.d-ma.be/mathias/tapir/internal/usecase"
+	"gitea.d-ma.be/mathias/tapir/internal/web"
 )
 
+// videoFetcher adapts the YouTube adapter to web.VideoFetcher for the paste flow
+// (Feature 2). It builds a per-user adapter bound to that user's token ref and
+// resolves a single video's metadata via the Data API — ungated; only the later
+// transcript fetch goes through globalFetchGate.
+type videoFetcher struct {
+	cfg     config.Config
+	secrets ports.SecretStore
+}
+
+func (f videoFetcher) FetchVideo(ctx context.Context, userID, videoID string) (domain.Video, error) {
+	a := youtube.New(youtube.Config{
+		ClientID:       f.cfg.YTClientID,
+		ClientSecret:   f.cfg.YTClientSecret,
+		TokenSecretRef: web.YouTubeTokenRef(userID),
+	}, f.secrets)
+	return a.VideoByID(ctx, userID, videoID)
+}
+
 // buildProcessor wires the summarization engine — YouTube source (captions-first),
 // AI-router summarizer, store sink — shared by `tapir run` and the web
 // "Summarize now" path so the wiring lives in one place. It returns (nil, nil) —

cmd/tapir/scheduler.go

@@ -49,10 +49,12 @@ func buildUserRunner(cfg config.Config, st *store.Store, secretStore ports.Secre
 		runner.WithAutoWindow(cfg.AutoSummarizeWindow)), nil
 }
 
-// userLister enumerates every registered user. *store.Store satisfies it via
-// ListAllUsers. A small local interface keeps the scheduler testable with a fake.
+// userLister enumerates every registered user and reports a user's video
+// connections. *store.Store satisfies it via ListAllUsers + ConnectionsForUser.
+// A small local interface keeps the scheduler testable with a fake.
 type userLister interface {
 	ListAllUsers(ctx context.Context) ([]store.UserIdentity, error)
+	ConnectionsForUser(ctx context.Context, userID string) ([]store.Connection, error)
 }
 
 // runDiscoveryPass runs one discovery pass for every user. runUser performs a
@@ -78,6 +80,18 @@ func runDiscoveryPass(
 		if ctx.Err() != nil {
 			break // shutting down: stop enumerating
 		}
+		// Skip users with no video connection. A discovery pass for them only
+		// attempts to resolve a token that was never minted, logging a spurious
+		// "ref not found" every tick (e.g. stale Dex-era orphan identities).
+		conns, err := lister.ConnectionsForUser(ctx, u.UserID)
+		if err != nil {
+			log.Warn("scheduler: list connections failed", "user", u.UserID, "err", err)
+			continue
+		}
+		if len(conns) == 0 {
+			log.Debug("scheduler: skipping user with no video connections", "user", u.UserID)
+			continue
+		}
 		stats, err := runUser(ctx, u.UserID)
 		total = sumStats(total, stats)
 		if err != nil {

cmd/tapir/scheduler_test.go

@@ -21,14 +21,25 @@ func quietLog() *slog.Logger {
 
 // fakeLister returns a fixed user set (or an error) for the scheduler under test.
 type fakeLister struct {
-	users []store.UserIdentity
-	err   error
+	users  []store.UserIdentity
+	err    error
+	noConn map[string]bool // users that have NOT connected a video source
 }
 
 func (f fakeLister) ListAllUsers(context.Context) ([]store.UserIdentity, error) {
 	return f.users, f.err
 }
 
+// ConnectionsForUser reports a single youtube connection for every user except
+// those in noConn, which return zero — the connection-less case the scheduler
+// must skip instead of running (and failing to resolve a token for).
+func (f fakeLister) ConnectionsForUser(_ context.Context, userID string) ([]store.Connection, error) {
+	if f.noConn[userID] {
+		return nil, nil
+	}
+	return []store.Connection{{Provider: "youtube"}}, nil
+}
+
 // countingRunUser records how many passes each user got, optionally failing for
 // specific users, under a mutex so it is safe across the scheduler goroutine.
 type countingRunUser struct {
@@ -91,6 +102,21 @@ func TestDiscoveryPassRunsEveryUserOnce(t *testing.T) {
 	require.Equal(t, 3, stats.Summarized, "stats are summed across users")
 }
 
+func TestDiscoveryPassSkipsUsersWithoutConnections(t *testing.T) {
+	// b never connected a video source (e.g. a stale Dex-era orphan identity).
+	// It must be skipped silently — not run and logged as a token error every pass.
+	lister := fakeLister{users: usersN("a", "b", "c"), noConn: map[string]bool{"b": true}}
+	rc := newCountingRunUser()
+
+	stats := runDiscoveryPass(context.Background(), lister, rc.run, quietLog())
+
+	require.Equal(t, 1, rc.count("a"))
+	require.Equal(t, 0, rc.count("b"), "a user with no connection must be skipped, not run")
+	require.Equal(t, 1, rc.count("c"))
+	require.Equal(t, 2, stats.Summarized, "only connected users contribute")
+	require.Equal(t, 0, stats.Errors, "skipping is silent — no spurious error stat")
+}
+
 func TestDiscoveryPassOneUserFailureDoesNotStopOthers(t *testing.T) {
 	lister := fakeLister{users: usersN("a", "b", "c")}
 	rc := newCountingRunUser("b") // user b's pass errors

docs/architecture/architecture.md

@@ -147,9 +147,17 @@ graph TB
   rate-limiting — ADR-014).
 - **Summarization mode** — `users.auto_summarize` (migration 006). Default is **true** for new
   users (migration 011, ADR-018); all existing rows were back-filled via migration 012. Auto:
-  every new video is summarized. Manual: new videos appear unsummarized; the button sets
-  `videos.summarize_requested`, which the next `tapir run` processes and clears. Both the click
-  path and the batch `tapir run` drive the same unchanged engine.
+  new videos **published within the recency window** (`TAPIR_AUTO_SUMMARIZE_WINDOW`, default ~7d,
+  ADR-020) are summarized automatically; older videos are discovered and listed but wait for an
+  explicit "Summarize". Manual: new videos appear unsummarized; the button sets
+  `videos.summarize_requested`, which the next `tapir run` processes and clears. A manual request
+  bypasses the recency bound. Both the click path and the batch `tapir run` drive the same
+  unchanged engine.
+- **List surface (ADR-020)** — the list reads `ListVideos` ordered summarized-first, then
+  `published_at DESC NULLS LAST`. The web layer collapses the noise so summaries are not buried:
+  un-summarized videos older than the recency window fold into one "Show N older videos"
+  disclosure, and caption-less videos collapse to a single count line. Copy surfaces scarcity
+  honestly (queue counts, gradual-fill note) — it never implies the feed is fuller than it is.
 
 The engine, ports, and sink adapters are **untouched** by all of the above — the web surface only
 reads the store and triggers the existing engine. Adding it changed wiring, not the core (ADR-003).
@@ -174,6 +182,7 @@ sequenceDiagram
         loop per user
             S->>DB: GetAutoSummarize(userID)
             S->>YT: ListSubscriptions + NewVideos
+            Note over S,DB: auto: skip videos published before<br/>TAPIR_AUTO_SUMMARIZE_WINDOW (ADR-020);<br/>older ones listed, await manual request
             Note over S,YT: WaitFetchGate(ctx) throttles<br/>all fetches to TAPIR_FETCH_RATE
             alt transcript available
                 S->>LLM: Summarize
@@ -214,19 +223,22 @@ Both paths share `globalFetchGate` — rate limiting is **respected in both**, n
 
 | Path | Trigger | Order | Rationale |
 |------|---------|-------|-----------|
-| **Foreground** | User clicks "Summarize now" on any non-summarized card (`POST /v/{id}/retry-now` for rate-limited; `POST /v/{id}/summarize` for pending) | Single chosen video | On-demand value: user picks a specific video to read now |
-| **Background batch** | Scheduled discovery pass every `TAPIR_DISCOVERY_INTERVAL` | **Newest-first across all channels** (see below) | Onboarding prioritisation: most recent, relevant videos surface first |
+| **Foreground** | User clicks "Summarize" on any non-summarized card (`POST /v/{id}/retry-now` for rate-limited; `POST /v/{id}/summarize` for pending) | Single chosen video | On-demand value: user picks a specific video to read now — bypasses the recency bound |
+| **Background batch** | Scheduled discovery pass every `TAPIR_DISCOVERY_INTERVAL` | **Newest-first across all channels** (see below), **bounded to the recency window** (ADR-020) | Onboarding prioritisation within bounded load: recent videos auto-fill; the older back-catalogue stays on-demand |
 
-The rationale for both paths is **onboarding prioritisation** — a new user should get summaries
-of their most recent, relevant videos quickly while the older back-catalogue fills in behind,
-all within the honest shared rate limit.
+The rationale for both paths is **onboarding prioritisation under an honest, bounded load** — a
+new user gets summaries of their most recent videos automatically, while the older back-catalogue
+is listed but summarised only on demand, so it never re-drives the shared rate gate every cycle.
 
 ### Newest-first batch ordering (ADR-018)
 
 Within each scheduled pass, `RunOnce` uses a three-phase structure:
 
 1. **Discover + persist**: walk all channels, `UpsertVideo` every candidate (so it appears in
-   the list), apply pre-filters (seen/manual/backoff), collect surviving candidates.
+   the list), apply pre-filters (seen/manual/backoff/**recency**), collect surviving candidates.
+   The recency pre-filter (ADR-020) drops auto-mode videos published before
+   `now - TAPIR_AUTO_SUMMARIZE_WINDOW` unless they are explicitly requested; an undated video is
+   never aged out. They remain persisted/listed — only auto-summarisation is skipped.
 2. **Sort**: order candidates `published_at DESC, NULLS LAST, discovery_pos ASC`. Videos with
    no publish date (schema 001: nullable) sort after all dated content. The sort is in-memory
    (`slices.SortStableFunc`) — at current scale this is fine.
@@ -235,7 +247,8 @@ Within each scheduled pass, `RunOnce` uses a three-phase structure:
 Before (per-channel inline): `[chanA-old, chanA-mid, chanB-new, chanB-null]`
 After  (newest-first):       `[chanB-new, chanA-mid, chanA-old, chanB-null]`
 
-The set of processed videos is identical; only the order within a pass changes.
+The set of *processed* videos now also excludes auto-mode back-catalogue beyond the recency
+window (those stay listed, summarised on demand); within the processed set, only order changes.
 
 ---
 

docs/data-model.md

@@ -147,9 +147,10 @@ mechanism.
 
 - **USER** — one row per registered user (Stage 1, ADR-012; no longer single-row). The Tapir-side
   profile; the Dex identity is held separately in `USER_IDENTITY`, not on this row. `auto_summarize`
-  (migration 006) is the per-user mode flag: `TRUE` = auto-summarize every new video. Default is
-  **true** for new users (migration 011, ADR-018); existing rows were back-filled via migration 012
-  with RLS bypass.
+  (migration 006) is the per-user mode flag: `TRUE` = auto-summarize new videos **published within
+  the recency window** (`TAPIR_AUTO_SUMMARIZE_WINDOW`, default ~7d, ADR-020); older videos are
+  listed but summarised on demand. Default is **true** for new users (migration 011, ADR-018);
+  existing rows were back-filled via migration 012 with RLS bypass.
 - **USER_IDENTITY** (migration 004) — the `dex_subject → user_id` map. `dex_subject` is the PK,
   `user_id` a `UNIQUE` FK to `users` with `ON DELETE CASCADE`. This is the bridge resolved at login
   *before* a `user_id` is known, so it is **deliberately not RLS-enabled** (it holds no user data;

docs/specs/newest-first-ordering.md

@@ -1,5 +1,11 @@
 # Spec — Newest-first batch ordering + honest "Try now" / prioritisation docs
 
+> **Extended by ADR-020 (2026-06-08).** This spec covers the *batch processing* order within a
+> pass. ADR-020 adds (a) a recency pre-filter — auto mode skips videos published before
+> `TAPIR_AUTO_SUMMARIZE_WINDOW`, listed but summarised on demand — and (b) the same
+> `published_at DESC NULLS LAST` ordering on the **list read** (`ListVideos`), which previously
+> sorted by `seen_at`. See `DECISIONS.md` ADR-020.
+
 **Repo:** tapir · **Size:** small · **Solo session.**
 
 **Why.** Product intent (maintainer, 2026-06-06): a new user should get summaries of their

docs/specs/scheduled-discovery.md

@@ -1,5 +1,10 @@
 # Spec — In-process scheduled discovery + auto-summarize + rate-gate finish
 
+> **Extended by ADR-020 (2026-06-08).** Auto-summarize is no longer "every unseen video": the
+> scheduler now skips videos published before `TAPIR_AUTO_SUMMARIZE_WINDOW` (default ~7d) unless
+> explicitly requested, so a back-catalogue does not re-drive the rate gate every cycle. See
+> `DECISIONS.md` ADR-020.
+
 **Repo:** tapir · **Size:** medium · **Solo session** (not a swarm).
 
 **Why this exists.** The Stage-0 gate ("me or a friend returns and reads/acts in ≥2 separate

docs/specs/video-card-states.md

@@ -1,5 +1,12 @@
 # Spec — Unify video-card states: one "Summarize now" verb, honest no-captions state
 
+> **Superseded in part by ADR-020 (2026-06-08).** The five card states still hold, but the copy
+> changed: the nudge verb is now **"Summarize"** (not "Summarize now"), the rate-limited state
+> reads **"In queue"** (not "Fetching soon…"), and the queued state reads **"summarizing
+> shortly"** (not "waiting for the next run"). The list also now collapses older un-summarized
+> and caption-less videos. See `DECISIONS.md` ADR-020 and `views.templ` (`VideoCard`) for the
+> current copy; this doc is kept as the original design record.
+
 **Repo:** tapir · **Size:** small, **view-layer only** (`views.templ` + a little CSS in
 `view.go`; regenerate `views_templ.go`). No handler, store, or DB change. The two existing
 handlers (`/summarize`, `/retry-now`) stay exactly as they are — only what the card *shows*

docs/ui-spec.md

@@ -179,3 +179,4 @@ distinguishable.
 | **"Summarize now" foreground path** | Unified quiet nudge button on actionable non-summarized cards. Five explicit card states — (1) summarized: chip + no button; (2) no captions (`transcript_status = 'none'`): "No transcript available", no button; (3) queued: "Queued" chip, no button; (4) rate-limited: "Fetching soon…" + "Summarize now" → `POST /v/{id}/retry-now` (clears `rate_limited_at`, triggers engine); (5) pending: "Not summarized" + "Summarize now" → `POST /v/{id}/summarize` (queues + triggers engine). One verb, one style (`.btn-quiet`); backend difference invisible to user. Both handlers call `ProcessVideo` through `globalFetchGate`. Rate gate respected, not bypassed — this is onboarding prioritisation. | Fast onboarding value; honest dead-end for no-captions videos (no button that fails). | `internal/web/handlers.go` (`handleRetryNow`, `handleRequestSummarize`); `internal/web/views.templ` (`VideoCard`) |
 | **Pipeline stats bar** | A one-line status bar above the video list: `N summarized · M fetching soon · K no captions`. Computed from the unfiltered row set; hidden when all videos are summarized. Gives the user a clear read on pipeline state without any interaction. | Replaces the "why is nothing happening?" confusion when most videos are pending or rate-limited. | `internal/web/view.go` (`PipelineStats`, `pipelineStats`) |
 | **Unavailable channels (account page)** | The `/account` page shows a "Unavailable channels" section when any channels returned HTTP 404 on the last discovery pass. Lists channel name, an "unavailable" badge, and the first-seen date. Data sourced from the `channel_errors` table (migration 013). | Surfaces silent failures so users know why some subscribed channels produce no new videos. | migration 013; `internal/web/account.go`; `internal/adapters/youtube/youtube.go` (`domain.ErrChannelUnavailable`) |
+| **Recency window + sparse-state honesty (ADR-020)** | Supersedes the copy/sort in the rows above. Auto-summarize is bounded to videos published within `TAPIR_AUTO_SUMMARIZE_WINDOW` (~7d); older un-summarized videos collapse behind a single "Show N older videos — summarize on demand" disclosure, and caption-less videos collapse to a one-line count (not N cards). List order is now `summarized-first, published_at DESC NULLS LAST`. Copy reframed for honest scarcity: pipeline bar reads "N ready · M in queue · K no captions" (no "fetching soon"); a gradual-fill note explains the rate limit; the nudge verb is "Summarize" (not "Summarize now"); the queued card says "summarizing shortly"; the empty-connected state drops the impossible `tapir run` instruction. Detail leads with Takeaways. Filters slimmed (no date pickers; hidden when empty); watched/skipped segmented; back link on detail; empty terms checkbox removed. | Make the sparse reality legible and honest instead of implying abundance/imminence; bound auto load so the back-catalogue doesn't re-drive the caption gate. Never fetch harder — scarcity is surfaced, not engineered around. | ADR-020; `2384c47`, `3df0459`, `40b703e`, `a1a5217`, `4a0a56e`, `9bf1c31`, `980638d`, `12fb031`, `f775441`, `51aa5d9` |

docs/use-cases/connect_account.feature

@@ -10,12 +10,26 @@ Feature: Connect and manage video accounts
     And my refresh token is stored only as a secret reference
     And my subscriptions are synced
 
+  @pending
+  # Vimeo connect is not built yet (provider label exists; no connect flow or test).
   Scenario: Connect a Vimeo account
     Given I have no connected video accounts
     When I connect my Vimeo account
     Then the connection is stored with status "active"
     And my subscriptions are synced
 
+  Scenario: Connecting an account discovers videos immediately
+    Given I have no connected video accounts
+    When I connect my YouTube account
+    Then a discovery pass for my account is triggered right away
+    And I do not have to wait for the next scheduled pass to see my videos
+
+  Scenario: Connecting summarizes my newest videos right away
+    Given I have no connected video accounts
+    When I connect my YouTube account
+    Then up to the onboarding cap of my newest videos are summarized through the rate gate
+    And the rest are left to the scheduled recency-bounded pass
+
   Scenario: Tokens are never stored in the clear
     When I connect any video account
     Then no OAuth token value is stored in the database
@@ -28,6 +42,9 @@ Feature: Connect and manage video accounts
     And no new videos are watched for that connection
     And my existing summaries remain readable
 
+  @pending
+  # Per-provider BYO credential config is not built as a web flow yet (the summarizer
+  # supports a fallback endpoint, but there is no user-facing BYO setup + its test).
   Scenario Outline: BYO AI credential is optional and per-provider
     When I configure a BYO provider "<provider>"
     Then the credential is stored only as a secret reference

docs/use-cases/landing_page.feature

@@ -19,6 +19,9 @@ Feature: Public landing page
     Then I see a link to my summaries
     And I see a way to log out
 
+  @pending
+  # Behaviour ships (logout redirects to /welcome) but is not unit-tested: logout lives in
+  # the OIDC Auth impl and StubAuth has no routes to exercise it cheaply.
   Scenario: Logging out returns to the welcome page
     Given I am logged in
     When I log out

docs/use-cases/paste_url.feature

@@ -0,0 +1,30 @@
+Feature: Paste a YouTube URL to summarize any video
+  As a user
+  I want to paste a YouTube link and get a summary
+  So that I can pull the specific video I want now, even from channels I don't follow
+
+  Scenario: Paste a valid YouTube URL
+    Given I am connected
+    When I paste a valid YouTube video URL
+    Then the video is added to my feed scoped to me
+    And it is queued for summarization through the shared rate gate
+
+  Scenario: Pasting an invalid link is rejected
+    When I paste something that is not a YouTube video URL
+    Then I get a clear error and nothing is added
+
+  Scenario: Pasting a video that cannot be found is honest
+    When I paste a URL whose video cannot be found
+    Then I am told it couldn't be found and nothing is added
+
+  Scenario: Pasting the same video twice does not duplicate it
+    Given I have pasted a video
+    When I paste the same video again
+    Then my feed still has exactly one entry for it
+
+  @pending
+  # Covered by the engine's ADR-010 no-transcript terminal state (degrade-never-error);
+  # there is no paste-specific test for it.
+  Scenario: A pasted video with no captions resolves honestly
+    When I paste a video that has no captions
+    Then it resolves to the "no transcript available" terminal state

docs/use-cases/registration.feature

@@ -34,6 +34,9 @@ Feature: Register and manage a multi-user account
     And the other user's data remains intact
     And my Dex identity is left intact
 
+  @pending
+  # Re-registration after delete is supported by design (delete leaves the Dex identity,
+  # ADR-013) but has no dedicated end-to-end test yet.
   Scenario: A deleted user can register again as a fresh account
     Given I deleted my Tapir account but my Dex identity still exists
     When I sign in again

docs/use-cases/summarize_mode.feature

@@ -6,15 +6,25 @@ Feature: Choose how new videos get summarized
   Background:
     Given I am a registered user with a connected video account
 
-  Scenario: Auto mode summarizes every new video
+  Scenario: Auto mode summarizes recent new videos automatically
     Given my summarization mode is "auto"
-    When a subscribed channel posts a new video with captions
+    When a subscribed channel posts a new video with captions within the recency window
     Then Tapir summarizes it without my asking
     And the summary appears in my list
 
-  Scenario: Manual mode is the default and leaves new videos unsummarized
-    Given I have not changed my summarization mode
-    Then my mode is "manual"
+  Scenario: Auto mode lists older videos without summarizing them
+    Given my summarization mode is "auto"
+    When discovery finds a video published before the recency window
+    Then the video appears in my list with no summary
+    And it is not summarized automatically
+    And I can still summarize it on demand with "Summarize"
+
+  Scenario: Automatic is the default for a new user
+    Given I have just registered
+    Then my summarization mode is "auto"
+
+  Scenario: Manual mode leaves new videos unsummarized
+    Given my summarization mode is "manual"
     When a subscribed channel posts a new video with captions
     Then the video appears in my list with no summary
     And nothing is summarized until I request it
@@ -30,3 +40,8 @@ Feature: Choose how new videos get summarized
   # auto_summarize is a per-user setting and summarize_requested is a per-video queue
   # flag (migration 006). The web button sets the flag; `tapir run` processes both the
   # auto videos and the manually queued ones, then clears the flag.
+  #
+  # Recency bound (ADR-020): in auto mode the scheduler only summarizes videos published
+  # within TAPIR_AUTO_SUMMARIZE_WINDOW (default ~7d); older videos are discovered and
+  # listed but wait for an explicit "Summarize" — so a back-catalogue does not re-drive
+  # the per-IP caption gate (ADR-014) every cycle. A manual request bypasses the bound.

internal/adapters/store/videos.go

@@ -72,3 +72,41 @@ func nullTime(t time.Time) *time.Time {
 	}
 	return &t
 }
+
+// NewestUnsummarizedVideoIDs returns up to limit of the user's videos that have
+// no summary yet, newest first (published_at DESC, NULLS LAST). It caps the
+// connect-time onboarding burst (Feature 1) at a fixed count: the caller marks
+// these for summarization through the shared rate gate. RLS-scoped via withUser,
+// so it only ever sees the requesting user's rows. limit <= 0 returns nil.
+func (s *Store) NewestUnsummarizedVideoIDs(ctx context.Context, userID string, limit int) ([]string, error) {
+	if limit <= 0 {
+		return nil, nil
+	}
+	var ids []string
+	if err := s.withUser(ctx, userID, func(tx pgx.Tx) error {
+		rows, err := tx.Query(ctx,
+			`SELECT v.id
+			   FROM videos v
+			  WHERE v.user_id = $1
+			    AND NOT EXISTS (
+			          SELECT 1 FROM summaries su
+			           WHERE su.user_id = v.user_id AND su.video_id = v.id)
+			  ORDER BY v.published_at DESC NULLS LAST, v.seen_at DESC
+			  LIMIT $2`, userID, limit)
+		if err != nil {
+			return fmt.Errorf("store: newest unsummarized: %w", err)
+		}
+		defer rows.Close()
+		for rows.Next() {
+			var id string
+			if err := rows.Scan(&id); err != nil {
+				return fmt.Errorf("store: scan newest unsummarized: %w", err)
+			}
+			ids = append(ids, id)
+		}
+		return rows.Err()
+	}); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}

internal/adapters/store/videos_test.go

@@ -81,3 +81,35 @@ func TestUpsertVideo_PerUserIsolation(t *testing.T) {
 
 	require.NotEqual(t, idA, idB, "same provider video for two users must be two distinct rows")
 }
+
+func TestNewestUnsummarizedVideoIDs(t *testing.T) {
+	ctx := context.Background()
+	s := newStore(t)
+	resetDB(t, rawPool(t))
+
+	mk := func(user, pid string, day int) string {
+		v := ytVideo(user, pid, pid)
+		v.PublishedAt = time.Date(2026, 6, day, 12, 0, 0, 0, time.UTC)
+		id, err := s.UpsertVideo(ctx, v)
+		require.NoError(t, err)
+		return id
+	}
+
+	_ = mk(userA, "a1vid000001", 1)
+	id2 := mk(userA, "a2vid000002", 2)
+	id3 := mk(userA, "a3vid000003", 3)
+	id4 := mk(userA, "a4vid000004", 4)
+	mk(userB, "b1vid000009", 9) // userB's newest — must never leak via RLS
+
+	// The newest (v4) is summarized, so it's excluded from "unsummarized".
+	require.NoError(t, s.Deliver(ctx, summary(userA, id4, "done")))
+
+	// Cap 2, newest-first unsummarized: v3 then v2 (v4 excluded; userB excluded).
+	got, err := s.NewestUnsummarizedVideoIDs(ctx, userA, 2)
+	require.NoError(t, err)
+	require.Equal(t, []string{id3, id2}, got)
+
+	none, err := s.NewestUnsummarizedVideoIDs(ctx, userA, 0)
+	require.NoError(t, err)
+	require.Empty(t, none, "limit 0 returns nothing")
+}

internal/adapters/youtube/videobyid_test.go

@@ -0,0 +1,59 @@
+package youtube
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"testing"
+
+	"gitea.d-ma.be/mathias/tapir/internal/domain"
+)
+
+func TestVideoByID(t *testing.T) {
+	const id = "dQw4w9WgXcQ"
+	a, secrets := newTestAdapter(t, func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/videos" {
+			t.Errorf("unexpected path %q (must use videos.list)", r.URL.Path)
+		}
+		if got := r.URL.Query().Get("id"); got != id {
+			t.Errorf("expected id=%s, got %q", id, got)
+		}
+		if got := r.URL.Query().Get("part"); got != "snippet" {
+			t.Errorf("expected part=snippet, got %q", got)
+		}
+		_, _ = w.Write([]byte(`{"items":[{"snippet":{"title":"Never Gonna Give You Up","publishedAt":"2026-05-20T09:00:00Z"}}]}`))
+	})
+
+	v, err := a.VideoByID(context.Background(), "u1", id)
+	if err != nil {
+		t.Fatalf("VideoByID: %v", err)
+	}
+	if v.UserID != "u1" {
+		t.Errorf("UserID = %q, want u1", v.UserID)
+	}
+	if v.ProviderVideoID != id || v.Title != "Never Gonna Give You Up" {
+		t.Errorf("unexpected video: %+v", v)
+	}
+	if v.Provider != domain.ProviderYouTube || v.URL != "https://www.youtube.com/watch?v="+id {
+		t.Errorf("video not wired correctly: %+v", v)
+	}
+	if v.PublishedAt.IsZero() {
+		t.Errorf("expected publishedAt parsed, got zero")
+	}
+	if v.SubscriptionID != "" {
+		t.Errorf("a pasted video must have no subscription, got %q", v.SubscriptionID)
+	}
+	if secrets.byRef == nil {
+		t.Errorf("token must be resolved by reference through the SecretStore")
+	}
+}
+
+func TestVideoByIDNotFound(t *testing.T) {
+	a, _ := newTestAdapter(t, func(w http.ResponseWriter, _ *http.Request) {
+		_, _ = w.Write([]byte(`{"items":[]}`))
+	})
+	_, err := a.VideoByID(context.Background(), "u1", "missingvid0")
+	if !errors.Is(err, domain.ErrVideoNotFound) {
+		t.Fatalf("VideoByID for missing id = %v, want domain.ErrVideoNotFound", err)
+	}
+}

internal/adapters/youtube/youtube.go

@@ -244,6 +244,37 @@ func (a *Adapter) NewVideos(ctx context.Context, sub domain.Subscription) ([]dom
 	return videos, nil
 }
 
+// VideoByID fetches a single video's metadata (videos.list, snippet) for an
+// arbitrary video id — including channels the user does not follow (paste-a-URL,
+// Feature 2). This is a Data API call (1 quota unit), NOT the rate-limited
+// caption path, so it is not gated: only the later transcript fetch goes through
+// globalFetchGate. UserID is set on the result and SubscriptionID is left empty
+// (a pasted video has no subscription parent). Returns ErrVideoNotFound when the
+// id resolves to no video.
+func (a *Adapter) VideoByID(ctx context.Context, userID, videoID string) (domain.Video, error) {
+	client, err := a.httpClient(ctx, a.cfg.TokenSecretRef)
+	if err != nil {
+		return domain.Video{}, err
+	}
+	q := url.Values{"part": {"snippet"}, "id": {videoID}}
+	var resp videoListResponse
+	if err := a.getJSON(ctx, client, "/videos", q, &resp); err != nil {
+		return domain.Video{}, fmt.Errorf("video by id %q: %w", videoID, err)
+	}
+	if len(resp.Items) == 0 {
+		return domain.Video{}, fmt.Errorf("video %q: %w", videoID, domain.ErrVideoNotFound)
+	}
+	it := resp.Items[0]
+	return domain.Video{
+		UserID:          userID,
+		Provider:        domain.ProviderYouTube,
+		ProviderVideoID: videoID,
+		Title:           it.Snippet.Title,
+		URL:             "https://www.youtube.com/watch?v=" + videoID,
+		PublishedAt:     it.Snippet.PublishedAt,
+	}, nil
+}
+
 // uploadsPlaylistID derives a channel's uploads playlist id at zero API cost:
 // a standard channel id "UCxxxx" maps to uploads playlist "UUxxxx". Returns
 // ok=false for ids that don't follow this convention (caller falls back to
@@ -342,6 +373,15 @@ type playlistItemListResponse struct {
 	} `json:"items"`
 }
 
+type videoListResponse struct {
+	Items []struct {
+		Snippet struct {
+			Title       string    `json:"title"`
+			PublishedAt time.Time `json:"publishedAt"`
+		} `json:"snippet"`
+	} `json:"items"`
+}
+
 type channelListResponse struct {
 	Items []struct {
 		ContentDetails struct {

internal/config/config.go

@@ -13,6 +13,7 @@ import (
 	"os"
 	"path/filepath"
 	"sort"
+	"strconv"
 	"strings"
 	"time"
 )
@@ -79,6 +80,13 @@ type Config struct {
 	// pre-recency behaviour). Default ~7 days.
 	AutoSummarizeWindow time.Duration
 
+	// OnboardSummarizeCount caps how many of a freshly-connected user's newest
+	// videos are summarized immediately on connect (the onboarding "it works"
+	// burst). HARD-capped at maxOnboardSummarizeCount so onboarding can never
+	// bulk-fetch; 0 disables the burst. Every fetch still flows through the shared
+	// caption rate gate (ADR-014) — the cap bounds count, never the pacing. Default 3.
+	OnboardSummarizeCount int
+
 	// DiscoveryInterval, when > 0, makes `serve` run in-process scheduled discovery
 	// for ALL users on that cadence (ADR-018). Zero/unset = disabled, so dev and
 	// tests never auto-fetch. Single-replica assumption — see cmdServe.
@@ -108,17 +116,19 @@ func (c Config) DexConfigured() bool { return strings.TrimSpace(c.OIDCIssuer) !=
 
 // Defaults (see docs/homelab-integration.md). All overridable via env.
 const (
-	defaultGatewayURL           = "http://koala:30401/v1"
-	defaultSummarizerModel      = "koala/phi4-mini"
-	defaultSummarizerTimeout    = 5 * time.Minute
-	defaultYTTokenRef           = "youtube/refresh_token"
-	defaultYTConnectRedirectURL = "https://tapir.d-ma.be/oauth/youtube/callback"
-	defaultOAuthRedirectAddr    = "localhost:8080"
-	defaultHTTPAddr             = ":8080"
-	defaultFetchBackoff         = time.Hour
-	defaultFetchRate            = 2 * time.Second
-	defaultPublicURL            = "https://tapir.d-ma.be"
-	defaultAutoSummarizeWindow  = 7 * 24 * time.Hour
+	defaultGatewayURL            = "http://koala:30401/v1"
+	defaultSummarizerModel       = "koala/phi4-mini"
+	defaultSummarizerTimeout     = 5 * time.Minute
+	defaultYTTokenRef            = "youtube/refresh_token"
+	defaultYTConnectRedirectURL  = "https://tapir.d-ma.be/oauth/youtube/callback"
+	defaultOAuthRedirectAddr     = "localhost:8080"
+	defaultHTTPAddr              = ":8080"
+	defaultFetchBackoff          = time.Hour
+	defaultFetchRate             = 2 * time.Second
+	defaultPublicURL             = "https://tapir.d-ma.be"
+	defaultAutoSummarizeWindow   = 7 * 24 * time.Hour
+	defaultOnboardSummarizeCount = 3
+	maxOnboardSummarizeCount     = 5
 )
 
 // Load reads the environment into a Config, applying defaults. It does not
@@ -183,6 +193,18 @@ func Load() (Config, error) {
 	}
 	c.AutoSummarizeWindow = autoWindow
 
+	onboard, err := intOr("TAPIR_ONBOARD_SUMMARIZE_COUNT", defaultOnboardSummarizeCount)
+	if err != nil {
+		return Config{}, err
+	}
+	if onboard < 0 {
+		onboard = 0
+	}
+	if onboard > maxOnboardSummarizeCount {
+		onboard = maxOnboardSummarizeCount
+	}
+	c.OnboardSummarizeCount = onboard
+
 	return c, nil
 }
 
@@ -247,6 +269,18 @@ func envOr(key, fallback string) string {
 	return fallback
 }
 
+func intOr(key string, fallback int) (int, error) {
+	v := os.Getenv(key)
+	if v == "" {
+		return fallback, nil
+	}
+	n, err := strconv.Atoi(v)
+	if err != nil {
+		return 0, fmt.Errorf("config: %s=%q: %w", key, v, err)
+	}
+	return n, nil
+}
+
 func durationOr(key string, fallback time.Duration) (time.Duration, error) {
 	v := os.Getenv(key)
 	if v == "" {

internal/config/config_test.go

@@ -53,6 +53,38 @@ func TestLoad_AppliesDefaults(t *testing.T) {
 	}
 }
 
+func TestLoad_OnboardSummarizeCount(t *testing.T) {
+	cases := []struct {
+		name, env string
+		want      int
+	}{
+		{"default", "", defaultOnboardSummarizeCount},
+		{"explicit", "4", 4},
+		{"zero disables", "0", 0},
+		{"clamped to hard cap", "50", maxOnboardSummarizeCount},
+		{"negative clamps to zero", "-3", 0},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			setEnv(t, map[string]string{"TAPIR_ONBOARD_SUMMARIZE_COUNT": c.env})
+			cfg, err := Load()
+			if err != nil {
+				t.Fatalf("Load: %v", err)
+			}
+			if cfg.OnboardSummarizeCount != c.want {
+				t.Fatalf("OnboardSummarizeCount = %d, want %d", cfg.OnboardSummarizeCount, c.want)
+			}
+		})
+	}
+}
+
+func TestLoad_OnboardSummarizeCountInvalid(t *testing.T) {
+	setEnv(t, map[string]string{"TAPIR_ONBOARD_SUMMARIZE_COUNT": "three"})
+	if _, err := Load(); err == nil {
+		t.Fatal("Load: want error for non-numeric TAPIR_ONBOARD_SUMMARIZE_COUNT")
+	}
+}
+
 func TestLoad_ParsesValues(t *testing.T) {
 	setEnv(t, map[string]string{
 		"TAPIR_USER_ID":               "11111111-1111-1111-1111-111111111111",

internal/domain/domain.go

@@ -3,10 +3,16 @@
 package domain
 
 import (
+	"errors"
 	"fmt"
 	"time"
 )
 
+// ErrVideoNotFound is returned when a video id resolves to no video (deleted,
+// private, or a typo'd paste). Defined in domain so adapters and the web layer
+// share one sentinel without coupling to each other.
+var ErrVideoNotFound = errors.New("video not found")
+
 // ErrChannelUnavailable is returned by a VideoSource when a channel's upload
 // playlist returns HTTP 404 — the channel was deleted or made private. The runner
 // stores these so the account page can surface them to the user.

internal/web/connect.go

@@ -23,6 +23,15 @@ type Connections interface {
 	UpsertConnection(ctx context.Context, userID string, c store.Connection) error
 }
 
+// DiscoveryTrigger requests an out-of-band discovery pass for a user. The connect
+// flow fires it the moment a YouTube account is linked so videos appear promptly
+// instead of waiting for the next scheduled pass (#6). Enqueue must be
+// non-blocking and safe to call from the request goroutine; the implementation
+// owns serialization with the scheduler (one pass at a time). nil = no trigger.
+type DiscoveryTrigger interface {
+	Enqueue(userID string)
+}
+
 // connectStateTTL bounds how long a generated CSRF state is valid between the
 // connect redirect and the provider callback.
 const connectStateTTL = 10 * time.Minute
@@ -43,6 +52,10 @@ type ConnectHandler struct {
 	Conns   Connections
 	Log     *slog.Logger
 
+	// Discovery, when set, is fired after a successful connect so the new
+	// connection's videos are discovered immediately (#6). Optional.
+	Discovery DiscoveryTrigger
+
 	states *connectStateStore
 	now    func() time.Time
 }
@@ -134,6 +147,12 @@ func (h *ConnectHandler) handleCallback(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	// Discover this user's videos now rather than waiting for the next scheduled
+	// pass (#6). Non-blocking; the trigger serializes with the scheduler.
+	if h.Discovery != nil {
+		h.Discovery.Enqueue(userID)
+	}
+
 	setFlash(w, flashConnected)
 	http.Redirect(w, r, "/", http.StatusSeeOther)
 }

internal/web/connect_test.go

@@ -45,6 +45,24 @@ func (c *fakeConns) UpsertConnection(_ context.Context, userID string, conn stor
 	return nil
 }
 
+// fakeTrigger records Enqueue calls so a test can assert connect fired discovery.
+type fakeTrigger struct {
+	mu    sync.Mutex
+	users []string
+}
+
+func (f *fakeTrigger) Enqueue(userID string) {
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	f.users = append(f.users, userID)
+}
+
+func (f *fakeTrigger) seen() []string {
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	return append([]string(nil), f.users...)
+}
+
 // tokenServer fakes Google's token endpoint, returning body for any POST.
 func tokenServer(t *testing.T, body string) *httptest.Server {
 	t.Helper()
@@ -126,6 +144,36 @@ func TestCallbackExchangesAndRecordsConnection(t *testing.T) {
 	require.Equal(t, wantRef, conns.conn.TokenRef)
 }
 
+func TestCallbackTriggersDiscovery(t *testing.T) {
+	srv := tokenServer(t,
+		`{"access_token":"at","refresh_token":"rt-secret","token_type":"Bearer","expires_in":3600}`)
+	app := newConnectApp(t, srv.URL, &fakeWriter{}, &fakeConns{})
+	trig := &fakeTrigger{}
+	app.Connect.Discovery = trig
+
+	state := connectState(t, app)
+	rec := do(t, app, httptest.NewRequest(http.MethodGet,
+		"/oauth/youtube/callback?state="+state+"&code=the-code", nil))
+
+	require.Equal(t, http.StatusSeeOther, rec.Code)
+	require.Equal(t, []string{userID}, trig.seen(),
+		"a successful connect must trigger discovery for the connecting user")
+}
+
+func TestCallbackNoDiscoveryOnFailedConnect(t *testing.T) {
+	srv := tokenServer(t,
+		`{"access_token":"at","refresh_token":"rt","token_type":"Bearer","expires_in":3600}`)
+	app := newConnectApp(t, srv.URL, &fakeWriter{}, &fakeConns{})
+	trig := &fakeTrigger{}
+	app.Connect.Discovery = trig
+
+	// No state → CSRF reject → nothing connected, so no discovery.
+	rec := do(t, app, httptest.NewRequest(http.MethodGet,
+		"/oauth/youtube/callback?code=the-code", nil))
+	require.Equal(t, http.StatusBadRequest, rec.Code)
+	require.Empty(t, trig.seen(), "a failed connect must not trigger discovery")
+}
+
 func TestCallbackRejectsMissingState(t *testing.T) {
 	srv := tokenServer(t,
 		`{"access_token":"at","refresh_token":"rt","token_type":"Bearer","expires_in":3600}`)

internal/web/handlers.go

@@ -3,6 +3,8 @@ package web
 import (
 	"context"
 	"errors"
+	"html/template"
+	"io"
 	"log/slog"
 	"net/http"
 	"time"
@@ -10,6 +12,7 @@ import (
 	"github.com/a-h/templ"
 
 	"gitea.d-ma.be/mathias/tapir/internal/adapters/store"
+	"gitea.d-ma.be/mathias/tapir/internal/domain"
 )
 
 // Store is the read/write surface the web handlers depend on — a narrow port over
@@ -30,6 +33,10 @@ type Store interface {
 	SetAutoSummarize(ctx context.Context, userID string, enabled bool) error
 	RequestSummarize(ctx context.Context, userID, videoID string) error
 
+	// UpsertVideo persists a pasted video (idempotent on user+provider+video id,
+	// so it also dedups) and returns its durable store id.
+	UpsertVideo(ctx context.Context, v domain.Video) (string, error)
+
 	// Account management (the /account page, disconnect, delete-account).
 	ConnectionsForUser(ctx context.Context, userID string) ([]store.Connection, error)
 	DeleteConnection(ctx context.Context, userID, provider string) error
@@ -78,6 +85,9 @@ type App struct {
 	// background goroutine (the "Summarize" button kicks it off). Nil = queue-only:
 	// the button flips the DB flag and the next `tapir run` does the work.
 	Processor Processor
+	// Fetcher, when non-nil, resolves an arbitrary YouTube video id to metadata for
+	// the paste-a-URL flow (Feature 2). Nil = the /paste route is not mounted.
+	Fetcher VideoFetcher
 	// Processing tracks in-flight immediate summarizations so the status endpoint
 	// shows the animation until the summary lands. The zero value is ready to use.
 	Processing ProcessingSet
@@ -132,6 +142,9 @@ func (a *App) Router() http.Handler {
 	app.HandleFunc("POST /v/{videoId}/action", a.handleAction)
 	app.HandleFunc("POST /v/{videoId}/summarize", a.handleRequestSummarize)
 	app.HandleFunc("POST /v/{videoId}/retry-now", a.handleRetryNow)
+	if a.Fetcher != nil {
+		app.HandleFunc("POST /paste", a.handlePaste)
+	}
 	app.HandleFunc("GET /v/{videoId}/status", a.handleStatus)
 	app.HandleFunc("GET /register", a.handleRegisterForm)
 	app.HandleFunc("POST /register", a.handleRegister)
@@ -198,19 +211,17 @@ func (a *App) handleList(w http.ResponseWriter, r *http.Request) {
 	rows := f.apply(allRows)
 	buckets := bucketRows(rows, a.recencyCutoff())
 
-	// hasConnected drives the empty state: a fresh account with a connection but
-	// no discovery pass yet has zero rows, and we want it to read "connected,
-	// summaries land gradually" rather than "nothing here". Only needed when the
-	// list is empty.
-	hasConnected := false
-	if buckets.empty() {
-		conns, err := a.Store.ConnectionsForUser(r.Context(), userID)
-		if err != nil {
-			a.serverError(w, r, "connections for user", err)
-			return
-		}
-		hasConnected = len(conns) > 0
+	// hasConnected drives both the paste box (shown to ANY connected user, #2) and
+	// the empty-state copy (a fresh account with a connection but no discovery pass
+	// yet reads "connected, summaries land gradually" rather than "nothing here").
+	// Computed every render — not only when empty — so a user with videos still
+	// gets the paste box.
+	conns, err := a.Store.ConnectionsForUser(r.Context(), userID)
+	if err != nil {
+		a.serverError(w, r, "connections for user", err)
+		return
 	}
+	hasConnected := len(conns) > 0
 
 	if isHTMX(r) {
 		a.render(w, r, summaryList(buckets, hasConnected))
@@ -324,6 +335,75 @@ func (a *App) handleRequestSummarize(w http.ResponseWriter, r *http.Request) {
 	a.render(w, r, VideoCard(*row))
 }
 
+// handlePaste handles "paste a YouTube URL" (Feature 2). It parses the video id,
+// fetches metadata (Data API — ungated), upserts a subscription-less video row
+// scoped to the user (idempotent, so it also dedups), and — if the video isn't
+// already summarized — requests a summary and kicks off immediate processing
+// through the SAME rate gate as the Summarize button. An explicit paste is a
+// manual request, so it summarizes regardless of the recency window. A video that
+// turns out to have no captions resolves to the honest "no transcript" terminal
+// state via the engine (ADR-010), not an error here.
+func (a *App) handlePaste(w http.ResponseWriter, r *http.Request) {
+	userID, ok := a.currentUserID(w, r)
+	if !ok {
+		return
+	}
+	videoID, err := parseYouTubeVideoID(r.FormValue("url"))
+	if err != nil {
+		a.pasteFailure(w, http.StatusBadRequest, "That doesn't look like a YouTube video link.")
+		return
+	}
+
+	v, err := a.Fetcher.FetchVideo(r.Context(), userID, videoID)
+	if errors.Is(err, domain.ErrVideoNotFound) {
+		a.pasteFailure(w, http.StatusNotFound, "That video couldn't be found — it may be private or removed.")
+		return
+	}
+	if err != nil {
+		a.serverError(w, r, "paste fetch", err)
+		return
+	}
+
+	id, err := a.Store.UpsertVideo(r.Context(), v)
+	if err != nil {
+		a.serverError(w, r, "paste upsert", err)
+		return
+	}
+	row, err := a.Store.GetVideoRow(r.Context(), userID, id)
+	if err != nil {
+		a.serverError(w, r, "paste get video", err)
+		return
+	}
+
+	// Dedup: already in the feed with a summary — surface the existing entry,
+	// don't re-summarize.
+	if row.Summarized {
+		a.render(w, r, VideoCard(*row))
+		return
+	}
+
+	// New or unsummarized: queue + (if a Processor is wired) summarize now, through
+	// the shared gate. RequestSummarize makes it durable even if the process dies.
+	if err := a.Store.RequestSummarize(r.Context(), userID, id); err != nil {
+		a.serverError(w, r, "paste request summarize", err)
+		return
+	}
+	if a.Processor != nil {
+		a.startProcessing(userID, id)
+		a.render(w, r, processingCard(*row))
+		return
+	}
+	a.render(w, r, VideoCard(*row))
+}
+
+// pasteFailure renders a minimal inline error fragment for the paste form (HTMX
+// swaps it in). No templ dependency so it renders even on a bad-input fast path.
+func (a *App) pasteFailure(w http.ResponseWriter, status int, msg string) {
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(status)
+	_, _ = io.WriteString(w, `<p class="paste-error" role="alert">`+template.HTMLEscapeString(msg)+`</p>`)
+}
+
 // handleRetryNow handles the "Try now" button on rate-limited video cards. It
 // clears the rate_limited_at backoff so the scheduler won't skip the video, then
 // triggers an immediate ProcessVideo — same background path as handleRequestSummarize.

internal/web/paste.go

@@ -0,0 +1,62 @@
+package web
+
+import (
+	"fmt"
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+// youtubeVideoID matches a canonical YouTube video id: exactly 11 URL-safe chars.
+var youtubeVideoID = regexp.MustCompile(`^[A-Za-z0-9_-]{11}$`)
+
+// parseYouTubeVideoID extracts the 11-character video id from a pasted YouTube
+// URL (watch?v=, youtu.be/, shorts/, embed/) or a bare id. It rejects non-YouTube
+// hosts and anything that doesn't yield a valid id, so the paste flow never tries
+// to fetch a video that can't exist (Feature 2).
+func parseYouTubeVideoID(raw string) (string, error) {
+	s := strings.TrimSpace(raw)
+	if s == "" {
+		return "", fmt.Errorf("empty input")
+	}
+
+	// Bare id (no URL) — accept directly.
+	if youtubeVideoID.MatchString(s) {
+		return s, nil
+	}
+
+	// Accept scheme-less URLs (youtube.com/watch?v=...) by giving url.Parse a host.
+	if !strings.Contains(s, "://") {
+		s = "https://" + s
+	}
+	u, err := url.Parse(s)
+	if err != nil {
+		return "", fmt.Errorf("not a URL: %w", err)
+	}
+
+	host := strings.ToLower(u.Hostname())
+	isYouTube := host == "youtu.be" || host == "youtube.com" || strings.HasSuffix(host, ".youtube.com")
+	if !isYouTube {
+		return "", fmt.Errorf("not a YouTube URL: %q", host)
+	}
+
+	var id string
+	switch {
+	case host == "youtu.be":
+		// youtu.be/<id>
+		id = strings.Trim(u.Path, "/")
+	case u.Path == "/watch":
+		id = u.Query().Get("v")
+	default:
+		// /shorts/<id>, /embed/<id>
+		parts := strings.Split(strings.Trim(u.Path, "/"), "/")
+		if len(parts) == 2 && (parts[0] == "shorts" || parts[0] == "embed") {
+			id = parts[1]
+		}
+	}
+
+	if !youtubeVideoID.MatchString(id) {
+		return "", fmt.Errorf("no YouTube video id in %q", raw)
+	}
+	return id, nil
+}

internal/web/paste_handler_test.go

@@ -0,0 +1,134 @@
+package web_test
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"gitea.d-ma.be/mathias/tapir/internal/domain"
+)
+
+// fakeFetcher is a web.VideoFetcher returning a fixed video (or an error),
+// scoped to whatever (userID, videoID) the handler asks for.
+type fakeFetcher struct {
+	title string
+	err   error
+	calls int
+}
+
+func (f *fakeFetcher) FetchVideo(_ context.Context, userID, videoID string) (domain.Video, error) {
+	f.calls++
+	if f.err != nil {
+		return domain.Video{}, f.err
+	}
+	return domain.Video{
+		UserID:          userID,
+		Provider:        domain.ProviderYouTube,
+		ProviderVideoID: videoID,
+		Title:           f.title,
+		URL:             "https://www.youtube.com/watch?v=" + videoID,
+	}, nil
+}
+
+func pasteReq(rawURL string) *http.Request {
+	req := httptest.NewRequest(http.MethodPost, "/paste",
+		strings.NewReader("url="+url.QueryEscape(rawURL)))
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	return req
+}
+
+func TestPasteValidURLAddsAndRequests(t *testing.T) {
+	ctx := context.Background()
+	app := newApp(t)
+	resetDB(t, rawPool(t))
+	app.Fetcher = &fakeFetcher{title: "Pasted Talk"}
+	p := rawPool(t)
+
+	rec := do(t, app, pasteReq("https://youtu.be/dQw4w9WgXcQ"))
+	require.Equal(t, http.StatusOK, rec.Code)
+
+	var (
+		count, requested int
+		title            string
+	)
+	require.NoError(t, p.QueryRow(ctx,
+		`SELECT count(*), coalesce(max(title),'') FROM videos
+		  WHERE user_id=$1 AND provider_video_id='dQw4w9WgXcQ'`, userID).Scan(&count, &title))
+	require.Equal(t, 1, count, "pasted video added once, scoped to the user")
+	require.Equal(t, "Pasted Talk", title)
+
+	require.NoError(t, p.QueryRow(ctx,
+		`SELECT count(*) FROM videos
+		  WHERE user_id=$1 AND provider_video_id='dQw4w9WgXcQ' AND summarize_requested`,
+		userID).Scan(&requested))
+	require.Equal(t, 1, requested, "pasted video is queued for summarization (through the gate)")
+}
+
+func TestPasteInvalidURLRejected(t *testing.T) {
+	app := newApp(t)
+	resetDB(t, rawPool(t))
+	app.Fetcher = &fakeFetcher{title: "x"}
+
+	rec := do(t, app, pasteReq("definitely not a url"))
+	require.Equal(t, http.StatusBadRequest, rec.Code)
+
+	var count int
+	require.NoError(t, rawPool(t).QueryRow(context.Background(),
+		`SELECT count(*) FROM videos WHERE user_id=$1`, userID).Scan(&count))
+	require.Equal(t, 0, count, "invalid input adds nothing")
+}
+
+func TestPasteVideoNotFound(t *testing.T) {
+	app := newApp(t)
+	resetDB(t, rawPool(t))
+	app.Fetcher = &fakeFetcher{err: domain.ErrVideoNotFound}
+
+	rec := do(t, app, pasteReq("https://youtu.be/dQw4w9WgXcQ"))
+	require.Equal(t, http.StatusNotFound, rec.Code)
+
+	var count int
+	require.NoError(t, rawPool(t).QueryRow(context.Background(),
+		`SELECT count(*) FROM videos WHERE user_id=$1`, userID).Scan(&count))
+	require.Equal(t, 0, count, "a not-found video adds nothing")
+}
+
+func TestPasteDedupNoDuplicate(t *testing.T) {
+	app := newApp(t)
+	resetDB(t, rawPool(t))
+	app.Fetcher = &fakeFetcher{title: "Pasted Talk"}
+
+	require.Equal(t, http.StatusOK, do(t, app, pasteReq("https://youtu.be/dQw4w9WgXcQ")).Code)
+	require.Equal(t, http.StatusOK, do(t, app, pasteReq("https://www.youtube.com/watch?v=dQw4w9WgXcQ")).Code)
+
+	var count int
+	require.NoError(t, rawPool(t).QueryRow(context.Background(),
+		`SELECT count(*) FROM videos WHERE user_id=$1 AND provider_video_id='dQw4w9WgXcQ'`,
+		userID).Scan(&count))
+	require.Equal(t, 1, count, "pasting the same video twice must not duplicate the row")
+}
+
+func TestListShowsPasteFormForConnectedUserWithVideos(t *testing.T) {
+	app := newApp(t)
+	resetDB(t, rawPool(t))
+	app.Fetcher = &fakeFetcher{title: "x"}
+	p := rawPool(t)
+
+	// Connected user with a non-empty feed (the case the bug missed: hasConnected
+	// was only computed for an empty feed).
+	_, err := p.Exec(context.Background(),
+		`INSERT INTO video_connections (user_id, provider, token_ref, status)
+		 VALUES ($1, 'youtube', 'youtube/x/refresh_token', 'active')`, userID)
+	require.NoError(t, err)
+	seedVideo(t, p, "11111111-1111-1111-1111-111111111111", "A talk", "https://youtu.be/aaaaaaaaaaa", time.Now())
+
+	rec := do(t, app, httptest.NewRequest(http.MethodGet, "/", nil))
+	require.Equal(t, http.StatusOK, rec.Code)
+	require.Contains(t, body(t, rec), `action="/paste"`,
+		"a connected user must see the paste box even when the feed has videos")
+}

internal/web/paste_test.go

@@ -0,0 +1,80 @@
+package web
+
+import (
+	"bytes"
+	"context"
+	"strings"
+	"testing"
+)
+
+func TestParseYouTubeVideoID(t *testing.T) {
+	const id = "dQw4w9WgXcQ"
+	ok := []struct {
+		name, in string
+	}{
+		{"watch", "https://www.youtube.com/watch?v=" + id},
+		{"watch no www", "https://youtube.com/watch?v=" + id},
+		{"watch m", "https://m.youtube.com/watch?v=" + id},
+		{"watch extra params", "https://www.youtube.com/watch?v=" + id + "&t=42s&list=PLxyz"},
+		{"watch param after", "https://www.youtube.com/watch?list=PLxyz&v=" + id},
+		{"short link", "https://youtu.be/" + id},
+		{"short link param", "https://youtu.be/" + id + "?si=abcd&t=1"},
+		{"shorts", "https://www.youtube.com/shorts/" + id},
+		{"embed", "https://www.youtube.com/embed/" + id},
+		{"bare id", id},
+		{"http scheme", "http://youtube.com/watch?v=" + id},
+		{"no scheme", "youtube.com/watch?v=" + id},
+		{"trailing space", "  https://youtu.be/" + id + "  "},
+	}
+	for _, c := range ok {
+		t.Run(c.name, func(t *testing.T) {
+			got, err := parseYouTubeVideoID(c.in)
+			if err != nil {
+				t.Fatalf("parseYouTubeVideoID(%q) error: %v", c.in, err)
+			}
+			if got != id {
+				t.Fatalf("parseYouTubeVideoID(%q) = %q, want %q", c.in, got, id)
+			}
+		})
+	}
+
+	bad := []struct {
+		name, in string
+	}{
+		{"empty", ""},
+		{"blank", "   "},
+		{"vimeo", "https://vimeo.com/123456789"},
+		{"other host", "https://example.com/watch?v=" + id},
+		{"watch no id", "https://www.youtube.com/watch?v="},
+		{"short id", "https://youtu.be/abc"},
+		{"long id", "https://youtu.be/" + id + "extra"},
+		{"bad chars", "https://youtu.be/dQw4w9Wg!cQ"},
+		{"not a url", "just some text"},
+		{"channel url", "https://www.youtube.com/@somechannel"},
+	}
+	for _, c := range bad {
+		t.Run("reject "+c.name, func(t *testing.T) {
+			if got, err := parseYouTubeVideoID(c.in); err == nil {
+				t.Fatalf("parseYouTubeVideoID(%q) = %q, want error", c.in, got)
+			}
+		})
+	}
+}
+
+func TestListPageShowsPasteFormOnlyWhenConnected(t *testing.T) {
+	render := func(connected bool) string {
+		var buf bytes.Buffer
+		if err := ListPage(listBuckets{}, Filter{}, PipelineStats{}, "", connected).Render(context.Background(), &buf); err != nil {
+			t.Fatalf("render: %v", err)
+		}
+		return buf.String()
+	}
+
+	html := render(true)
+	if !strings.Contains(html, `name="url"`) || !strings.Contains(html, `action="/paste"`) {
+		t.Errorf("connected feed must show the paste form")
+	}
+	if strings.Contains(render(false), `name="url"`) {
+		t.Errorf("disconnected feed must not show the paste form")
+	}
+}

internal/web/processing.go

@@ -3,6 +3,8 @@ package web
 import (
 	"context"
 	"sync"
+
+	"gitea.d-ma.be/mathias/tapir/internal/domain"
 )
 
 // Processor runs the core summarization use case for a single already-discovered
@@ -14,6 +16,14 @@ type Processor interface {
 	ProcessVideo(ctx context.Context, userID, videoID string) error
 }
 
+// VideoFetcher resolves an arbitrary YouTube video id to its metadata for the
+// paste-a-URL flow (Feature 2). It is a Data API call, NOT the rate-limited
+// caption path. Returns domain.ErrVideoNotFound for a deleted/private/typo'd id.
+// cmd/tapir wires a per-user YouTube adapter; nil disables the paste route.
+type VideoFetcher interface {
+	FetchVideo(ctx context.Context, userID, videoID string) (domain.Video, error)
+}
+
 // ProcessingSet tracks the (user, video) ids currently being summarized in-process
 // so the status endpoint can show the animation until the summary lands. It is
 // ephemeral (single-instance Stage-1): a restart drops it, and the DB holds the

internal/web/view.go

@@ -333,7 +333,7 @@ type flashView struct {
 // flashMessages maps each flash code to its banner. An unknown code renders no
 // banner (flashFor returns ok=false), so a forged cookie value is inert.
 var flashMessages = map[string]flashView{
-	flashConnected:     {"success", "YouTube account connected."},
+	flashConnected:     {"success", "YouTube account connected — finding your subscriptions. Your newest videos will appear below as they're summarized."},
 	flashConnectFailed: {"error", "Could not connect your YouTube account. Please try again."},
 	flashDisconnected:  {"success", "Account disconnected."},
 	flashDeleted:       {"success", "Your account and all its data were deleted."},

internal/web/views.templ

@@ -107,6 +107,9 @@ templ flashBanner(code string) {
 templ ListPage(b listBuckets, f Filter, stats PipelineStats, flash string, hasConnected bool) {
 	@Layout("Tapir — Summaries") {
 		@flashBanner(flash)
+		if hasConnected {
+			@pasteForm()
+		}
 		if !b.empty() || f.active() {
 			@filterForm(f)
 		}
@@ -143,6 +146,28 @@ templ pipelineBar(s PipelineStats) {
 	</div>
 }
 
+// pasteForm lets a connected user summarize any YouTube video by pasting its URL
+// (Feature 2). The result (a video card, or an inline error) swaps into
+// #paste-result; the next list refresh shows it inline. Summarization runs
+// through the shared caption rate gate like every other fetch.
+templ pasteForm() {
+	<form
+		class="paste"
+		method="post"
+		action="/paste"
+		hx-post="/paste"
+		hx-target="#paste-result"
+		hx-swap="innerHTML"
+	>
+		<label>
+			Summarize any video
+			<input type="url" name="url" placeholder="Paste a YouTube link…" required/>
+		</label>
+		<button type="submit">Add</button>
+	</form>
+	<div id="paste-result"></div>
+}
+
 templ filterForm(f Filter) {
 	<form
 		class="filters"

test/acceptance/scenario_coverage_test.go

@@ -0,0 +1,219 @@
+package acceptance
+
+// This is the name-coverage gate for the BDD spec (see docs/use-cases/*.feature).
+// There is no godog runner — the .feature files are design records, and the real
+// behaviour is covered by the hand-written Go tests across the module. This test
+// keeps the two from drifting in the cheapest honest way: every non-@pending
+// Scenario must have an entry in scenarioCoverage pointing at a Go test that
+// actually exists. It does NOT prove the test exercises the scenario (only godog
+// could); it catches the common drift — "added a scenario, forgot the test", a
+// renamed/deleted covering test, or a scenario removed without cleaning the map.
+//
+// When you add a Scenario: either map it here to its covering test, or tag it
+// @pending in the .feature with a one-line reason for why it has no test yet.
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"testing"
+)
+
+// scenarioCoverage maps each non-@pending Scenario name to the Go test that
+// covers it. Keep it in sync with docs/use-cases/*.feature — the test below
+// fails if a scenario is unmapped, a mapped test is missing, or an entry no
+// longer matches a real non-pending scenario.
+var scenarioCoverage = map[string]string{
+	// ai_routing.feature
+	"Local AI produces the summary":                             "TestSummarize_LocalSucceeds",
+	"Local AI fails and the user has a BYO provider configured": "TestSummarize_FallsBackToBYO",
+	"Local AI fails and the user has no BYO provider":           "TestSummarize_LocalFailsNoBYO_NoExternalSend",
+	"A user without BYO never has content sent externally":      "TestSummarize_NoBYO_ContentOnlyLocal",
+
+	// landing_page.feature
+	"An unauthenticated visit to the root is sent to the welcome page":    "TestUnauthenticatedRootRedirectsToWelcome",
+	"The welcome page invites an unauthenticated visitor to start":        "TestWelcomeLoggedOut",
+	"An authenticated user on the welcome page sees their way in and out": "TestWelcomeLoggedIn",
+
+	// connect_account.feature
+	"Connect a YouTube account":                          "TestCallbackExchangesAndRecordsConnection",
+	"Connecting an account discovers videos immediately": "TestCallbackTriggersDiscovery",
+	"Connecting summarizes my newest videos right away":  "TestNewestUnsummarizedVideoIDs",
+	"Tokens are never stored in the clear":               "TestCallbackExchangesAndRecordsConnection",
+
+	// paste_url.feature
+	"Paste a valid YouTube URL":                              "TestPasteValidURLAddsAndRequests",
+	"Pasting an invalid link is rejected":                    "TestPasteInvalidURLRejected",
+	"Pasting a video that cannot be found is honest":         "TestPasteVideoNotFound",
+	"Pasting the same video twice does not duplicate it":     "TestPasteDedupNoDuplicate",
+	"Revoking a connection stops watching but keeps history": "TestDisconnectRemovesTokenAndConnectionKeepsAccount",
+
+	// summarize_mode.feature
+	"Auto mode summarizes recent new videos automatically":           "TestRunOnce_AutoMode_SkipsOldVideos",
+	"Auto mode lists older videos without summarizing them":          "TestRunOnce_AutoMode_SkipsOldVideos",
+	"Automatic is the default for a new user":                        "TestRegisteredUserDefaultsAutoSummarizeOn",
+	"Manual mode leaves new videos unsummarized":                     "TestRunOnce_ManualMode_SkipsUnrequested",
+	"Requesting a summary in manual mode queues it for the next run": "TestRunOnce_ManualMode_ProcessesRequested",
+
+	// registration.feature
+	"A new Dex subject is routed to registration":                               "TestUnregisteredSubjectRedirectedToRegister",
+	"Registering creates the account and its identity mapping":                  "TestRegisterCreatesExactlyOneUserAndIdentity",
+	"A returning subject passes straight through":                               "TestRegisteredSubjectPassesThrough",
+	"Deleting an account removes only my data and leaves other users untouched": "TestDeleteAccountWipesDataAndSecretsAndLogsOut",
+
+	// summarize_new_video.feature
+	"A subscribed channel posts a video that has captions":         "TestSubscribedVideoWithCaptionsIsSummarizedAndDelivered",
+	"A subscribed channel posts a video with no usable transcript": "TestVideoWithNoTranscriptIsSkipped",
+	"A channel I am not subscribed to posts a video":               "TestUnsubscribedChannelVideoIsNotProcessed",
+	"The same video is not summarized twice":                       "TestAlreadySummarizedVideoIsNotReprocessed",
+}
+
+var (
+	scenarioRe = regexp.MustCompile(`^\s*Scenario(?: Outline)?:\s*(.+?)\s*$`)
+	testFuncRe = regexp.MustCompile(`^func (Test\w+)\(`)
+)
+
+// scenario is one parsed Gherkin scenario and whether it is @pending.
+type scenario struct {
+	name    string
+	pending bool
+}
+
+func TestScenarioCoverage(t *testing.T) {
+	root := moduleRoot(t)
+
+	scenarios := parseScenarios(t, filepath.Join(root, "docs", "use-cases"))
+	if len(scenarios) == 0 {
+		t.Fatal("no scenarios parsed from docs/use-cases — wrong path?")
+	}
+	tests := allTestFuncNames(t, root)
+
+	// Index scenario names for the reverse (stale-entry) check.
+	active := map[string]bool{} // non-pending scenario names
+	var pending []string
+	for _, s := range scenarios {
+		if s.pending {
+			pending = append(pending, s.name)
+			continue
+		}
+		active[s.name] = true
+
+		// 1. Every non-pending scenario must be mapped.
+		fn, ok := scenarioCoverage[s.name]
+		if !ok {
+			t.Errorf("scenario %q has no coverage entry — map it in scenarioCoverage to a covering test, or tag it @pending in the .feature", s.name)
+			continue
+		}
+		// 2. The mapped test must actually exist.
+		if !tests[fn] {
+			t.Errorf("scenario %q maps to %q, which is not a Test function anywhere in the module", s.name, fn)
+		}
+	}
+
+	// 3. No stale entries: every map key must be a real, non-pending scenario.
+	for name := range scenarioCoverage {
+		if !active[name] {
+			t.Errorf("scenarioCoverage has entry %q, which is not a current non-pending scenario (renamed, removed, or now @pending?)", name)
+		}
+	}
+
+	if len(pending) > 0 {
+		t.Logf("%d @pending scenario(s) without a test (tracked, not required): %s",
+			len(pending), strings.Join(pending, "; "))
+	}
+}
+
+// parseScenarios reads every *.feature under dir and returns its scenarios with
+// their @pending status. A scenario is @pending when a `@pending` tag line
+// precedes it (tags survive intervening comment lines, the layout these files
+// use); the flag is consumed at the Scenario line and reset afterward.
+func parseScenarios(t *testing.T, dir string) []scenario {
+	t.Helper()
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		t.Fatalf("read use-cases dir: %v", err)
+	}
+	var out []scenario
+	for _, e := range entries {
+		if e.IsDir() || !strings.HasSuffix(e.Name(), ".feature") {
+			continue
+		}
+		b, err := os.ReadFile(filepath.Join(dir, e.Name()))
+		if err != nil {
+			t.Fatalf("read %s: %v", e.Name(), err)
+		}
+		pending := false
+		for _, line := range strings.Split(string(b), "\n") {
+			trimmed := strings.TrimSpace(line)
+			if strings.HasPrefix(trimmed, "@") {
+				if strings.Contains(trimmed, "@pending") {
+					pending = true
+				}
+				continue
+			}
+			if m := scenarioRe.FindStringSubmatch(line); m != nil {
+				out = append(out, scenario{name: m[1], pending: pending})
+				pending = false
+			}
+			// comment (#) and step lines leave a set @pending intact until the
+			// scenario consumes it; a blank line between scenarios is harmless.
+		}
+	}
+	return out
+}
+
+// allTestFuncNames walks the module for `func TestXxx(` declarations, excluding
+// this file (whose regex literal would otherwise look like a definition).
+func allTestFuncNames(t *testing.T, root string) map[string]bool {
+	t.Helper()
+	self := "scenario_coverage_test.go"
+	names := map[string]bool{}
+	err := filepath.WalkDir(root, func(path string, d os.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if d.IsDir() {
+			if d.Name() == ".git" {
+				return filepath.SkipDir
+			}
+			return nil
+		}
+		if !strings.HasSuffix(path, "_test.go") || filepath.Base(path) == self {
+			return nil
+		}
+		b, err := os.ReadFile(path)
+		if err != nil {
+			return err
+		}
+		for _, line := range strings.Split(string(b), "\n") {
+			if m := testFuncRe.FindStringSubmatch(line); m != nil {
+				names[m[1]] = true
+			}
+		}
+		return nil
+	})
+	if err != nil {
+		t.Fatalf("walk module: %v", err)
+	}
+	return names
+}
+
+// moduleRoot walks up from the working directory to the dir containing go.mod.
+func moduleRoot(t *testing.T) string {
+	t.Helper()
+	dir, err := os.Getwd()
+	if err != nil {
+		t.Fatalf("getwd: %v", err)
+	}
+	for {
+		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
+			return dir
+		}
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			t.Fatal("go.mod not found walking up from cwd")
+		}
+		dir = parent
+	}
+}