Pure ANSI terminal chart renderers. Every renderer is a pure function — shaped data plus target dimensions in, a string containing ANSI escape codes out — with no Ink / React / process / terminal dependencies, so the same functions serve interactive TUIs and non-interactive stdout commands (and are trivially unit-testable by asserting on strings).

The module is self-contained: the only runtime dependency is chalk. Nothing in here may import from the rest of the CLI — application-specific concerns (query shaping, number-format schemas) stay outside and plug in through data types and formatter callbacks.

Supporting API: stripAnsi (clean output for pipes/agents), niceTicks (1/2/2.5/5×10ⁿ axis domains), resampleSeries (peak-preserving width resampling), resampleLinear (for linear axes like timestamps), defaultFormatValue (compact number formatting), renderLegend, renderTimeAxis.

• Peak-preserving resampling: charts stretch to the terminal width by pinning every bucket value exactly at its nearest column (upscale) or keeping each column range's max-magnitude value (downscale). Plain linear resampling samples between buckets, attenuating narrow spikes (a 0→1→0 spike renders as ~0.94) — never do that to data.
• Nice y-axes: domains are pinned at zero with the top rounded up to a 1/2/2.5/5×10ⁿ tick boundary and only tick rows labeled — like axis tick generation in mainstream charting libraries — instead of labeling every row with raw fractions of the data range.
• Formatting is injected: renderers accept formatTick / formatValue / formatNumericCell callbacks so callers control units (durations, bytes, percentages) without this module knowing about any particular format schema.
• Gaps, not false zeros: non-finite values (NaN) render as gaps in line charts — missing data reads as missing. Resampling never interpolates across a gap, and isolated points get a point marker.

plot.ts is a gap-aware derivative of asciichart (MIT, © 2016 Igor Kroitor).