# Session 0024.0 — Transcript

> App: human-experience-filter-art
> Start: 2026-06-26T21-12 (PST)
> Type: planning-and-executing
> Posture: yolo
> Claude-Session: e0aea412-c853-4236-9536-cfd85cbc4975
> End: 2026-06-27T15-23 (PST)
> Status: **FINALIZED.**
>
> Started as writing-plans; transitioned to planning-and-executing (yolo) when the
> operator approved the plan and asked to execute in-session.

## Next /goal

Build **scrub-driven altitude transitions** per the approved design at
`docs/superpowers/specs/2026-06-27-scrub-driven-altitude-transitions-design.md`:
knob position continuously scrubs the morph `currentTime` + crossfades adjacent
scale audio (hold-partway, reversible, re-roll on fresh approach, wheel auto-scrubs
one altitude). Phase 1: interaction on current morphs. Phase 2: re-bake all 154
morphs all-intra for smooth seeking + re-push LFS. Writing-plans → executing-plans
in a fresh session. (Operator was handed a ready-to-paste prompt.)

## Launch prompt

> Fix altitude/video transition: video shouldn't switch when changing altitudes;
> good zoom transition for every video combination; video must not change after
> zooming to a new altitude.

Operator refinements during orientation:
- **Lock per altitude until the altitude is changed** — on arrival, pick the
  clip once and keep it; no secondary swap, no re-roll while parked.
- **Choose the destination clip BEFORE transitioning, then play the appropriate
  morph footage.** We need morph footage for ALL transitions between ALL videos
  in adjacent altitudes (both directions).

## Plan

Anchor: leaf change extending player `design.md §3` (scale navigation & zoom
transitions) + content-pipeline. **Scope reality:** clip-pair-keyed morph system
— **154 morph clips** (77 adjacent video pairs × 2 directions) up from 5 per-edge
morphs; touches the bake pipeline (`build_pool_manifest.py`), the ring contract
(`player/ring.py`), manifest/transition schema (`simulator/clips.py`), the
`/api/ring/advance` endpoint (`simulator/app.py`), the frontend `advance()`/lock
(`simulator/static/app.js`), and a new Playwright E2E tier. Writing-plans session:
author ONE plan, stop at the review gate.

## Deferred decisions

- The dial-needle **sweep** (synced to the morph) is verified working in Chromium +
  WebKit both directions, but the operator's real Safari still showed it "not
  working" — root cause likely stale cached `app.js` (Safari refresh confusion),
  never fully confirmed. Moot: the **scrub-driven redesign supersedes** the dial
  interaction entirely. The sweep commit merged to main as an interim improvement.
- **git-LFS front-proxy upload limit** (HTTP 413 on the 68 MB base): resolved by
  transcoding rather than raising the server limit — the operator couldn't locate
  the front-proxy VM (`35.238.203.16`, nginx, not in any gcloud project I could
  reach) this session. Raising that limit is a deferred infra task.

## Arc

**Pre-state.** Altitude dial (PR #18, s0016) navigated a 5-scale ring with **5
per-edge** morphs (scale-primary→primary). Landing picked a random pool member, but
`advance()` played the edge morph (ending on the primary) then did a jarring
fade-to-black **secondary swap** to the random member. Operator: "video switches when
changing altitudes; must not change after zooming."

**What we built (writing-plans → executing, planning-and-executing).**
1. Orientation + clarification: lock-per-altitude; **pick destination first then play
   the matching morph**; morphs for **all adjacent video pairs both directions** (154);
   multi-detent **chains** through each altitude.
2. Wrote + reviewed the plan (`docs/superpowers/plans/2026-06-27-altitude-clip-pair-morph-lock.md`);
   operator approved + asked to execute in-session → switched to yolo.
3. Executed TDD: per-clip-pair manifest + member-pair baking; `Transition`/`morph_for`/
   `resolve_move` in `player/ring.py`; `resolved_move_to_dict`; `/api/ring/advance`
   `from_clip_id`; frontend pick→morph→lock (no secondary swap); regenerated 154
   morphs. pytest 302 passed; new **Playwright E2E tier** 2 passed.
4. **Media graduation:** operator flagged that "sample" media is actually the
   experience — committed bases + audio + 154 morphs (~526 MB) via **git-LFS → Gitea
   LFS store**. Hit HTTP 413 on the 68 MB `coast_birdrock` base at the front proxy;
   **transcoded it 68→22 MB** (re-baked its 16 morphs) to ship. Pushed; merged to main.
5. Polish loop on the **dial/transition timing** (sweep → removed live drag pre-move),
   then operator **reframed**: knob position should *drive* the transition (scrub),
   not the dial follow the video. Brainstormed + wrote the **scrub-driven design spec**;
   handed off a prompt to build it in a fresh session.

**Recurring lesson re-confirmed:** the operator's mid-session "no transitions" was a
**stale uvicorn** (served new `app.js` from disk but old in-memory API returning the
deleted old-named morph files → 404). Fix = restart uvicorn with the venv python.

**Cut state.** `main` (528fb5c) has the shipped feature, LFS media, E2E tier, both the
plan and the scrub design spec. No content repo → plan archived in-repo under `docs/`
(gap flagged). Simulator is localhost-only (no PPE/prod) → no §9 deploy stage; verified
green locally. Next increment (scrub) deferred to a fresh session.
