content(sim): rotating clip pools + progressive tracked labels & emotions

Content-pipeline Increment 2, part 1 (the experience). Implements design §11
(docs/superpowers/specs/2026-06-24-content-pipeline-design.md):

- Rotating pool (§11.1): each ring scale references a POOL of vetted clips
  (docs/content-candidate-pool.md); the player picks a random member on landing.
  player.ring.Scale gains `pool` + pure `pick_clip_id(scale, r)` (injected
  randomness); the pick happens at the API boundary (random.random()), a delta=0
  advance is the initial/re-roll pick. clips.py parses/exposes the pool; the
  client lands on move.target_clip_id. Back-compat: a scale with only clip_id is
  a pool of one.
- Rename ring scale forest -> coast (new land<->sea scale, orbit..reef); ring
  order cosmos -> orbit -> coast -> reef -> abyss -> wrap. Cleanup: dropped the
  leftover local media (cosmos_traverse, orbit_westcoast, old forest/reef, the
  Increment-1 orbit/abyss single bases); new coast-edge transition placeholders.
- Time-windowed tracked labels (§11.2): annotations gain appear/disappear
  (loop-normalized, wraps across the seam); a label shows only while on screen
  and its box tracks the subject. abyss + reef pools authored as test material.
- Progressive LEFT detail tiers (§11.3): per-object `salience` (first shows at
  Left 5-salience) + tiered strings (general -> specific -> scientific -> +fact)
  escalating with the Left knob; replaces flat min_level gating. Strings may be a
  tier list or a static string (back-compat). No engine change (client reads
  overlay.level).
- Progressive RIGHT emotion tiers (§11.4): affect vocabulary escalates basic ->
  compound with the Right knob (dream.strength); appearance still gated by
  min(left,right). No engine change.

New simulator/build_pool_manifest.py holds the hand-authored content and emits
the 19-clip pool manifest (the reproducible baseline). setup_scales_media.py
marked superseded. 251 passed / 4 skipped (+ ring pool + API pool/window tests).
By-eye visual review deferred to the operator (no Chrome on this box).

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

docs/superpowers/specs/2026-06-24-content-pipeline-design.md

@@ -1,7 +1,7 @@
 # HEF — Content Pipeline (source → process → label → manifest)
 
 **Date:** 2026-06-24
-**Status:** Graduated — operator-approved (session 0014); **Increment 1 built & merged** (PR #13). Increment 2 (hybrid track pass + author mode) + real PD sourcing pending.
+**Status:** Graduated — operator-approved (session 0014); **Increment 1 built & merged** (PR #13); real PD sourcing + rotating pool curated (PR #14/#15). **Increment 2 schema pinned + building** (session 0016 — see §11).
 **Repo:** `human-experience-filter-art`
 **Anchor:** `docs/ROADMAP.md` sub-project 3 (Player Runtime) content needs; the
 spiritual successor to sub-project 2 (Ingest & Tagging tools), retargeted from the
@@ -239,7 +239,114 @@ master encode (waits on a measured pano spec).
   download + provenance record for v1.
 - **Crossfade overlap length** per scale (slow cosmos vs busier reef) — by eye.
 
-## 10. Out of scope (YAGNI)
+## 11. Increment 2 — schema decisions (session 0016)
+
+Increment 2 is the second build order from §8. It is mostly **schema work**, so
+this section pins the concrete data shapes before the build (the operator asked for
+a short design pass first). Each subsection is a new, **backward-compatible**
+extension — Increment 1 manifests keep rendering unchanged.
+
+### 11.1 Rotating clip pool (supersedes one-clip-per-scale)
+
+Each ring scale references a **pool** of vetted clips
+(`docs/content-candidate-pool.md`); the player picks **one member at random when
+the viewer lands on that scale** (zooming the ring in/out). This supersedes
+decision §5's one-base-per-scale.
+
+- **Manifest:** `ring.scales[i]` gains `"pool": ["clip_id", …]` (≥1). The legacy
+  `"clip_id"` stays as the **primary** member for back-compat (= `pool[0]` when a
+  pool is written); a scale with only `clip_id` and no `pool` behaves exactly as
+  Increment 1 (pool of one).
+- **Canonical logic (`player/ring.py`):** `Scale` gains `pool: tuple[str, …]`;
+  `members` = `pool or (clip_id,)`. A **pure** `pick_clip_id(scale, r)` takes an
+  injected `r ∈ [0,1)` and returns `members[int(r·len)]` — randomness stays
+  **injected** (DI), so the function is pure/testable and the Pi reuses it.
+- **Where the pick happens:** at the **API boundary** (`simulator/app.py`), which
+  may be impure: the advance endpoint calls `pick_clip_id(landed_scale,
+  random.random())` and returns it as `target_clip_id`. A `delta=0` advance is the
+  **initial / re-roll** pick (no-op move, fresh random member). The client loads
+  `move.target_clip_id` directly instead of deriving the clip from the index. One
+  selection implementation, Python-canonical (browser still "only renders").
+- **Rename + cleanup:** ring scale `forest` → **`coast`** (new land↔sea scale
+  between `orbit` and `reef`). Drop the leftovers `cosmos_traverse`,
+  `orbit_westcoast`, old `forest`, old `reef` (per the pool doc's cleanup list);
+  the cosmos pool's primary stays `cosmos` (Orion). New ring order:
+  `cosmos → orbit → coast → reef → abyss → (wrap) cosmos`; edges regenerated
+  (`orbit-coast`, `coast-reef` placeholders via `setup_scales_media.py`).
+
+### 11.2 Time-windowed tracked labels
+
+Objects drift **into and out of frame**, so a label appears only **while its
+object is on screen** and its box **tracks** the object (the §4 keyframed `track`).
+
+- **Manifest:** an annotation gains optional `"appear"` and `"disappear"`
+  (loop-normalized `t ∈ [0,1]`, same clock as `track`). The label renders only
+  while `appear ≤ loopT ≤ disappear`. To let an object straddle the loop seam, a
+  **`disappear < appear` window wraps** (visible when `loopT ≥ appear` **or**
+  `loopT ≤ disappear`). Absent both fields → always-present (Increment-1 behavior).
+- **Runtime:** client-side in `renderOverlay` — a window test gates the annotation
+  before the existing `boxAt(loopT)` placement. Engine unchanged (labels are not in
+  `RenderPlan`). The **abyss + reef** pool clips (creatures entering/leaving) are
+  the authored test material.
+
+### 11.3 Progressive LEFT-brain detail tiers (replaces flat `min_level` gating)
+
+The Left knob now drives **how many** labels show **and how analytical** each is —
+no fading. Low Left = **fewer, more general** labels; high Left = **more** labels +
+**more analytical** detail.
+
+- **Per-object `salience` (1–4):** how prominent the object is. It sets the Left
+  level at which the label first appears: `first_level = 5 − salience` (salience 4 →
+  appears at Left 1; salience 1 → only at Left 4). So raising Left brings in
+  lower-salience objects.
+- **Detail tiers (escalate with Left):** the displayed string escalates
+  `tier 1 general ("eel") → 2 specific ("moray eel") → 3 scientific
+  (*Gymnothorax*) → 4 scientific + a fact (lifespan)`. The tier shown =
+  `clamp(left − first_level + 1, 1, n_tiers)` — an object shows tier 1 the moment
+  it appears and climbs one tier per further Left notch until its tiers run out.
+- **Strings carry the tiers:** `strings.en[key]` may be a **list** (indexed by
+  `tier−1`) instead of a string; a plain string stays static (back-compat, tier
+  ignored). Keeps one key per object and the i18n table as the single source.
+- **Back-compat:** an annotation with `min_level` and no `salience` keeps flat
+  gating (`first_level = min_level`, single-tier string). `measure.*` readouts stay
+  single-tier, gated by their level (a measurement is not a tiered object).
+- **No engine change:** tier selection is client-side against the existing
+  `overlay.level` (the Left knob) already in the `RenderPlan`.
+
+### 11.4 Progressive RIGHT-brain emotion tiers
+
+The affect **vocabulary** gets more sophisticated as Right rises — basic words at
+Right 1, nuanced/compound feelings at high Right — mirroring §11.3 for affect.
+
+- **Appearance rule unchanged:** affect surfaces only when **both** knobs are up;
+  an anchor's `min_level` is tested against `strength = min(left, right)` as today.
+- **Emotion tiers:** `strings.en[feel.key]` may be a **list**; the word shown =
+  `clamp(right, 1, n_tiers)` (the Right knob, read from `dream.strength` already in
+  the `RenderPlan`). A plain string stays static (back-compat).
+- **No engine change:** `AffectOverlay` already carries `strength`; the Right level
+  comes from `dream.strength`. Tier selection is client-side.
+
+### 11.5 `tools/pipeline/track.py` (hybrid) + simulator author mode
+
+The stage-5 tooling from §3.5 / §7, delivered as a **second PR** after the
+experience PR (§8's split note).
+
+- **`track.py`:** a **classical** path (OpenCV CSRT / optical-flow) seeded by a
+  hand-drawn box on a keyframe, propagated and **sampled to a sparse keyframed
+  `track`** (normalized `{t, box}` over the loop, §4); plus an **optional,
+  lazy-imported ML** detect+track path (YOLO+ByteTrack-class) that proposes tracks
+  the author maps to keys. Both emit the same `track` artifact + an `appear`/
+  `disappear` window. Pure helpers (normalization, keyframe sampling,
+  track→manifest) are unit-tested; an **opt-in** integration test runs the real
+  tracker on a pool clip (mirrors the Increment-1 real-footage test).
+- **Author mode (simulator):** reuse the preview UI as the editor — scrub a pool
+  clip, draw/seed/correct boxes, run the tracker, assign `key` / `salience` /
+  tiered strings / `appear`-`disappear` / affect anchors, and **write the manifest
+  entry** (an endpoint upserts via `tools/pipeline/manifest.upsert_clip` and
+  persists). Semantics (keys, strings, scientific names, facts) are **always
+  hand-authored** — the tracker only propagates **box geometry** (§3.5).
+
+## 12. Out of scope (YAGNI)
 
 - Generative i2v **ring transitions** for the new edges (deferred; placeholders hold).
 - **Audio** sourcing/alteration (separate content-dial channel; already deferred).