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Stop rebuilding chart overlays on every live tick.

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Ticks were force-redrawing trendline overlays and, in diagnostic mode,
sampling canvas pixels. That maxed CPU. Also document production log
and capture access for agents.
This commit is contained in:
Chris Amow 2026-08-26 01:36:17 -05:00
parent e94bd3d3d2
commit c2ad2e8d7d
2 changed files with 30 additions and 9 deletions
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29
AGENTS.md
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@ -111,6 +111,35 @@ trendlines: historical/future canonical price changes, their screen slopes, and
whether the future canvas point exists. Include it in a capture when a line whether the future canvas point exists. Include it in a capture when a line
looks kinked at the live edge; it separates bad geometry from a bad renderer. looks kinked at the live edge; it separates bad geometry from a bad renderer.
## Production logs and captures
Do not ask the user to paste console output or screenshots when these work.
This is not a production shell.
```
ssh -i ~/.ssh/chart_debug_ed25519 -o BatchMode=yes \
chart-debug@chart.amow.com 'logs --since 20m'
ssh -i ~/.ssh/chart_debug_ed25519 -o BatchMode=yes \
chart-debug@chart.amow.com status
ssh -i ~/.ssh/chart_debug_ed25519 -o BatchMode=yes \
chart-debug@chart.amow.com container-state
ssh -i ~/.ssh/chart_debug_ed25519 -o BatchMode=yes \
chart-debug@chart.amow.com recent-deploy
```
Allowed commands only: `logs --since <Ns|Nm|Nh|Nd>`, `status`,
`container-state`, `recent-deploy`, `capture-read c-…`,
`capture-delete c-…`. Anything else is denied. Log output is redacted
and capped. Never print tokens, env, or the private key.
**Captures:** user opens `?diag=1`, hits Capture diagnostic (or
`Alt+Shift+C`), and shares the PNG URL
`https://chart.amow.com/api/debug/captures/{id}`. Inspect only a URL they
explicitly share. Fetch the PNG (public by id), then immediately
`DELETE` it — via that URL or
`ssh … chart-debug@chart.amow.com 'capture-delete c-XXXXXXXXXXXX'`.
Do not inspect unsolicited capture ids.
## Future whitespace is a high-risk boundary ## Future whitespace is a high-risk boundary
Drawing bugs repeatedly appear to the right of the last real candle. Treat any Drawing bugs repeatedly appear to the right of the last real candle. Treat any

10
static/chart.js
View file

@ -811,7 +811,7 @@ class ConfluenceChart {
else this.bars.push(bar); else this.bars.push(bar);
if (advanced) this.extendManualLineSeries(last, bar); if (advanced) this.extendManualLineSeries(last, bar);
if (advanced) this.syncRthLines(); if (advanced) this.syncRthLines();
this.scheduleOverlays(true); if (advanced) this.scheduleOverlays(true);
} }
extendManualLineSeries(previous, bar) { extendManualLineSeries(previous, bar) {
@ -2578,14 +2578,6 @@ class ConfluenceChart {
`#${row.level.number} ${row.level.tf} dp ${((row.current.p ?? 0) - (row.previous.p ?? 0)).toFixed(3)}/${((row.next.p ?? 0) - (row.current.p ?? 0)).toFixed(3)} px ${(row.historical ?? 0).toFixed(3)}/${(row.future ?? 0).toFixed(3)} paint ${painted ? `${painted.historical?.toFixed(3) ?? '?'}/${painted.future?.toFixed(3) ?? '?'}` : '?/?'} ${row.series == null ? 'MISSING' : 'OK'}`; `#${row.level.number} ${row.level.tf} dp ${((row.current.p ?? 0) - (row.previous.p ?? 0)).toFixed(3)}/${((row.next.p ?? 0) - (row.current.p ?? 0)).toFixed(3)} px ${(row.historical ?? 0).toFixed(3)}/${(row.future ?? 0).toFixed(3)} paint ${painted ? `${painted.historical?.toFixed(3) ?? '?'}/${painted.future?.toFixed(3) ?? '?'}` : '?/?'} ${row.series == null ? 'MISSING' : 'OK'}`;
this.projectionDiagnostic.textContent = lines.map(row => text(row)).join('\n'); this.projectionDiagnostic.textContent = lines.map(row => text(row)).join('\n');
this.projectionDiagnostic.hidden = !lines.length; this.projectionDiagnostic.hidden = !lines.length;
if (this.projectionDiagnosticFrame != null) cancelAnimationFrame(this.projectionDiagnosticFrame);
this.projectionDiagnosticFrame = requestAnimationFrame(() => {
this.projectionDiagnosticFrame = null;
this.projectionDiagnostic.textContent = lines.map(row => text(row, {
historical: this.paintedSlopeBetween(row.previous, row.current, ConfluenceChart.levelColor(row.level)),
future: this.paintedSlopeBetween(row.current, row.next, ConfluenceChart.levelColor(row.level)),
})).join('\n');
});
} }
paintedSlopeBetween(first, second, color) { paintedSlopeBetween(first, second, color) {