add sessions/0037/SESSION-0037.0-TRANSCRIPT-2026-06-30T10-42--2026-06-30T10-52.md + replace placeholder/variant SESSION-0037.0-TRANSCRIPT-2026-06-30T10-42--INPROGRESS.md

sessions/0037/SESSION-0037.0-TRANSCRIPT-2026-06-30T10-42--2026-06-30T10-52.md

@@ -0,0 +1,76 @@
+# Session 0037.0 — Transcript
+
+> App: human-experience-filter-art
+> Start: 2026-06-30T10-42 (PST)
+> Type: planning-and-executing
+> Posture: yolo
+> Claude-Session: aa7ac424-d797-4918-8837-2a904441d91e
+> Checkout: /Users/benstull/git/benstull.org/benstull/human-experience-filter-art/.claude/worktrees/session-0037-altitude-snap-on-release
+> End: 2026-06-30T10-52 (PST)
+> Status: **FINALIZED.**
+
+## Summary
+
+Single-task UX session. Made the altitude dial **snap to the closest altitude on
+drag release** so a grab-and-release always lands on a discrete altitude, just
+like a tap/label-click.
+
+### Arc
+
+1. Claimed session 0037 (two stale `--INPROGRESS` placeholders 0015/0017 noted,
+   not live). Worked in an isolated worktree
+   (`session-0037-altitude-snap-on-release`) branched off `origin/main` (local
+   `main` was 7 behind).
+2. Located the behavior: `onDialUp` (`simulator/static/app.js`) held the live
+   blend wherever a real turn stopped — the "no auto-complete" continuous-encoder
+   model. Tap path (`moved < 6` → `jumpToScale`) and wheel/label auto-scrub were
+   already snap-to-altitude.
+3. TDD: added an `altitude-lock.spec.ts` e2e ("releasing a partial drag snaps to
+   the closest altitude") — confirmed RED (held pos never became integer).
+4. Implemented: a real turn (`moved >= 6`) now `autoScrub(Math.round(pos))` →
+   short scrub to the nearest altitude, settle + lock (frac 0). Reduced motion is
+   handled inside `autoScrub` (jump-to-target). GREEN.
+5. Verified: full altitude-lock (14) + a11y + i18n e2e suites green. Committed,
+   pushed, opened PR #31, merged to `main` (`5696b94`).
+
+### Pipeline (§9)
+
+This app is **exempt** from flotilla/PPE/§9 prod gate — public target is static
+Cloudflare (Pages + R2). Change is merged to `main`; **operator redeploy** of the
+static build is the remaining ship step. No plan artifact archived: the change
+was a trivial leaf `task`, planned inline (no separate plan file; app has no
+content repo).
+
+### Next session
+
+Operator by-eye review of the snap feel on the live sim, then redeploy to
+Cloudflare.
+
+## Launch prompt
+
+> When the user is dragging the slider (rather than clicking on an altitude),
+> let's transition to the closest altitude when they let go. That way, the user
+> will always land on an altitude as if they clicked one, even if they're
+> grabbing and releasing the slider.
+
+## Plan
+
+> Anchor: leaf `task` (UX behavior tweak — directly plan-eligible, R2b).
+
+Snap-on-release for the altitude dial. Today `onDialUp` (app.js) holds the live
+blend wherever a drag stops (the "no auto-complete" continuous-encoder model).
+Change: after a real turn (`moved >= 6`), `autoScrub(Math.round(pos))` so the
+knob settles on the CLOSEST altitude (frac 0 → lock), identical to a tap/click.
+Tap path (`moved < 6` → `jumpToScale`) unchanged. Reduced-motion is handled by
+`autoScrub` (jump-to-target, no tween).
+
+Verification: new e2e in `altitude-lock.spec.ts` ("releasing a partial drag
+snaps to the closest altitude") — TDD red→green; full altitude-lock (14) + a11y
++ i18n suites green. Project is exempt from §9/PPE (static Cloudflare target);
+ships branch → PR → merge → operator redeploy.
+
+## Deferred decisions
+
+_Autonomous-mode low-confidence calls the driver made and would have
+liked operator input on. Appended as the session runs; surfaced at
+finalize. Empty if none._

sessions/sessions.json

@@ -106,5 +106,8 @@
   },
   "0036": {
     "title": ""
+  },
+  "0037": {
+    "title": ""
   }
 }