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feat(33): structured pump stats + the session planner and its plain-words copy

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Slice 2. 588 green, 0 warnings.

- `FramePumpStats` and `FramePump.StatsReported`: the 5 s window the log line already describes, as
  data. `Dropped` is the ENCODER's counter (frames submitted, not accepted); `Stalls`/`AvgRenderMs`
  are the pump's. `FramesRendered` is deliberately not used for classification — a static scene
  reuses the paste cache and renders few frames while completely healthy, so it would read as
  starvation.
- `StepDownPlanner`: one per broadcast, owns the stateful policy, converts stats → sample, exposes the
  landed tier for the restart. It never acts — the VM owns the effects, which is what keeps the ladder
  testable without an encoder.
- `Describe` / `ReportLine`: the sentences a creator sees. Machine cause says LlamaCasty couldn't keep
  up and the connection was not the problem; upload cause blames the upload and promises no further
  thrash. A test asserts the machine copy never leaks "dropped" — mechanism strings stay in the log.

Remaining for the task: VM subscription, the encoder restart at the landed tier, the toast, and
shedding our own capture cost before stepping fps.
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gramps
2026-11-09 10:06:36 -08:00
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commit 555ff5c0ac
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TASKS.md
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@@ -49,7 +49,7 @@ cited first), then 35 / 37 / 40·A/C/D / 55·2–3. TASK 32 is complete, Back on
| 40·A/C/D | ☐ | App Settings: active-camera picker; persist output resolution + surface transition defaults + confirm-before-End; accent consolidation | [`task-40`](TASKS/task-40-app-settings-round.md) |
| 3·20 | ✅ | Session report — **derived from `superChatEvents.list` on demand, not persisted** (YouTube is the authority; no ledger). Per-currency totals, money off by default (done 2026-11-05) | [`task-03`](TASKS/task-03-capture-pipeline.md) |
| 32 | ✅ | Stream resilience: fragmented MP4, blip retry, poll-driven RECONNECTING (no countdown — YouTube's cutoff is not a constant), ingest pre-flight, one-click Back on air (`BackOnAirTests`) | [`task-32`](TASKS/task-32-stream-resilience.md) |
| 33 | 🔶 | Auto step-down — **`StepDownPolicy` + 12 unit tests done 2026-11-09** (two ladders, budgets, floors, cooldown, ambiguity, recovery behind a flag); remaining: pump/health wiring, encoder restart, toast + session line, capture-cost shed | [`task-33`](TASKS/task-33-bandwidth-step-down.md) |
| 33 | 🔶 | Auto step-down — **`StepDownPolicy` + 12 unit tests done 2026-11-09** (two ladders, budgets, floors, cooldown, ambiguity, recovery behind a flag); policy + `StepDownPlanner` + 16 tests done; remaining: VM subscribe + encoder restart + toast, capture-cost shed | [`task-33`](TASKS/task-33-bandwidth-step-down.md) |
| 34 | ☐ | Scheduled streams (Text-drawer version) | [`task-34`](TASKS/task-34-scheduled-streams.md) |
| 35 | ☐ | Scene-linked audio | [`task-35`](TASKS/task-35-scene-linked-audio.md) |
| 37 | ☐ | Defaults vs current layout split (build-id); enables one-click revert to defaults | [`task-37`](TASKS/task-37-defaults-current-split.md) |