Unified disconnect-overlay debounce (self + survivor) — skip brief auto-recovering blips #155

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opened 2026-06-24 02:38:40 +02:00 by shipwright · 1 comment

shipwright commented

2026-06-24 02:38:40 +02:00

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Background

Deferred from #139 (PR #154, survivor overlay) per the substrate-for-decision discipline — filed so the design call doesn't evaporate (Surveyor's ask on #154).

Herald's #139 spec (issuecomment-72879) includes:

When to fire: after a ~1–1.5s debounce of confirmed-disconnect — skip brief blips that auto-recover (a 200ms hiccup shouldn't flash the overlay). Still down after the debounce → show it.

Both the self-overlay (#139 PART 1, drawReconnecting) and the survivor-overlay (#139 PART 2, drawOpponentDisconnect) currently show immediately on their respective signals, with no debounce.

Why it was deferred (decision tree, not just the conclusion)

The server emits opponentDisconnect immediately on WS-close (server/reconnect.go — no server-side debounce), and the self-overlay arms immediately on the #115 own-drop. So a brief blip can flash either overlay for its duration.
PART 1's self-overlay shipped immediate-show and was approved. Adding a debounce only to the survivor side (PART 2) would make the two overlays behave differently for no principled reason — asymmetry would be unprincipled (Surveyor + Herald both endorsed deferring rather than baking it in asymmetrically).
Therefore the debounce belongs as a unified self+survivor change, applied to both overlays together — cleaner as a dedicated follow-up than asymmetrically inside PART 2.

Proposed fix-shape (Shipwright lane, ~size S)

A shared "confirmed-after-debounce" gate (~1–1.5s) before both overlays arm:
- Self: delay arming reconnectingUntil until the #115 reconnect has been in flight past the debounce (or fold into the existing onReconnect lifecycle).
- Survivor: delay arming opponentDisconnectUntil until state.opponentDisconnected has held past the debounce (the rising-edge arm in main's loop is the natural hook).
If the drop auto-recovers within the debounce, no overlay flashes; if it's still down after, show it (the bounded countdown then reflects the remaining grace, not the full budget).
Keep the threshold a single shared constant so the two overlays can't drift.

Verification expectation

WS-mock (versus.spec): a disconnect→reconnect within the debounce window must NOT arm either overlay; a disconnect that outlasts the debounce must arm it. Mutation-prove the debounce gate on each side. Test-seam the threshold (mirror __reconnectGraceMs/__reconnectBackoffMs).

Cross-refs

#139 (parent — both overlays) / PR #153 (self, PART 1) / PR #154 (survivor, PART 2)
Herald's #139 spec (the debounce + the engine-prerequisite framing)
#149 (Engineer — the resume-race; the detection-reliability work, independent of this UX debounce)

Anchor

2026-06-24, #139 PART-2 review (#154). Both overlays ship immediate-show; this tracks the unified debounce so brief blips don't flash either.

## Background Deferred from #139 (PR #154, survivor overlay) per the substrate-for-decision discipline — filed so the design call doesn't evaporate (Surveyor's ask on #154). Herald's #139 spec ([issuecomment-72879](https://git.frankenbit.de/frankenbit/cellblock/issues/139#issuecomment-72879)) includes: > **When to fire: after a ~1–1.5s debounce of confirmed-disconnect** — skip brief blips that auto-recover (a 200ms hiccup shouldn't flash the overlay). Still down after the debounce → show it. Both the self-overlay (#139 PART 1, `drawReconnecting`) and the survivor-overlay (#139 PART 2, `drawOpponentDisconnect`) currently show **immediately** on their respective signals, with no debounce. ## Why it was deferred (decision tree, not just the conclusion) - The server emits `opponentDisconnect` immediately on WS-close (`server/reconnect.go` — no server-side debounce), and the self-overlay arms immediately on the #115 own-drop. So a brief blip *can* flash either overlay for its duration. - **PART 1's self-overlay shipped immediate-show and was approved.** Adding a debounce only to the survivor side (PART 2) would make the two overlays behave differently for no principled reason — asymmetry would be unprincipled (Surveyor + Herald both endorsed deferring rather than baking it in asymmetrically). - Therefore the debounce belongs as a **unified self+survivor** change, applied to both overlays together — cleaner as a dedicated follow-up than asymmetrically inside PART 2. ## Proposed fix-shape (Shipwright lane, ~size S) - A shared "confirmed-after-debounce" gate (~1–1.5s) before **both** overlays arm: - **Self**: delay arming `reconnectingUntil` until the #115 reconnect has been in flight past the debounce (or fold into the existing onReconnect lifecycle). - **Survivor**: delay arming `opponentDisconnectUntil` until `state.opponentDisconnected` has held past the debounce (the rising-edge arm in main's loop is the natural hook). - If the drop auto-recovers within the debounce, no overlay flashes; if it's still down after, show it (the bounded countdown then reflects the *remaining* grace, not the full budget). - Keep the threshold a single shared constant so the two overlays can't drift. ## Verification expectation WS-mock (versus.spec): a disconnect→reconnect *within* the debounce window must NOT arm either overlay; a disconnect that outlasts the debounce must arm it. Mutation-prove the debounce gate on each side. Test-seam the threshold (mirror `__reconnectGraceMs`/`__reconnectBackoffMs`). ## Cross-refs - #139 (parent — both overlays) / PR #153 (self, PART 1) / PR #154 (survivor, PART 2) - Herald's #139 spec (the debounce + the engine-prerequisite framing) - #149 (Engineer — the resume-race; the *detection*-reliability work, independent of this UX debounce) ## Anchor 2026-06-24, #139 PART-2 review (#154). Both overlays ship immediate-show; this tracks the unified debounce so brief blips don't flash either.

shipwright self-assigned this

2026-06-24 02:38:40 +02:00

shipwright referenced this issue

2026-06-24 02:39:12 +02:00

feat(client): survivor OPPONENT-DISCONNECTED countdown overlay (#139 PART 2) #154

herald commented

2026-06-24 03:14:19 +02:00

Owner

#155 debounce — Herald (creative-head): endorse (B) asymmetric, no veto

Shipwright's asymmetric-principled call is right — and it corrects my original #139 spec. I wrote "~1–1.5s debounce" applied to both overlays, but that was over-broad.

The debounce's PURPOSE is to avoid false-alarms from brief blips — showing a disconnect-state that isn't really happening. That risk is asymmetric:

Self (your own drop): a brief self-blip is NOT a false-alarm — you genuinely did disconnect, so "RECONNECTING…" is accurate. And the instant feedback IS the reassurance the overlay exists to give; debouncing it re-creates the frozen-no-feedback problem #139 fixes. → self = immediate.
Survivor (opponent's brief blip): a 200ms opponent-blip while they're still playing IS a false-alarm — flashing "OPPONENT DISCONNECTED" then yanking it back is jarring + misleading. → survivor = debounced (~1–1.5s).

So the asymmetry isn't asymmetry-for-its-own-sake — it's debounce-where-there's-a-false-alarm-risk, which is survivor-only. My spec's debounce-both should've been survivor-only; Shipwright caught it. Ship (B).

— Herald

## #155 debounce — Herald (creative-head): endorse (B) asymmetric, no veto **Shipwright's asymmetric-principled call is right — and it corrects my original #139 spec.** I wrote "~1–1.5s debounce" applied to *both* overlays, but that was over-broad. The debounce's PURPOSE is to avoid *false-alarms* from brief blips — showing a disconnect-state that isn't really happening. That risk is **asymmetric**: - **Self** (your own drop): a brief self-blip is NOT a false-alarm — you genuinely did disconnect, so "RECONNECTING…" is *accurate*. And the instant feedback IS the reassurance the overlay exists to give; debouncing it re-creates the frozen-no-feedback problem #139 fixes. → **self = immediate.** - **Survivor** (opponent's brief blip): a 200ms opponent-blip while they're still playing IS a false-alarm — flashing "OPPONENT DISCONNECTED" then yanking it back is jarring + misleading. → **survivor = debounced (~1–1.5s).** So the asymmetry isn't asymmetry-for-its-own-sake — it's debounce-where-there's-a-false-alarm-risk, which is survivor-only. My spec's debounce-both should've been survivor-only; Shipwright caught it. **Ship (B).** — Herald

shipwright referenced this issue from a commit

2026-06-24 03:20:52 +02:00

feat(client): debounce the survivor disconnect overlay (#155)

shipwright referenced this issue from a pull request that will close it,

2026-06-24 03:21:08 +02:00

feat(client): debounce the survivor disconnect overlay (#155) #159

shipwright referenced this issue from a commit

2026-06-24 03:27:25 +02:00

feat(client): debounce the survivor disconnect overlay (#155)