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// plainLanguage — the non-engineer's read of a board.
//
// Everything else in this workspace speaks EDA: `drc_violation`,
// `[hole_clearance]`, `source_component.ftype`. That vocabulary is correct and
// an engineer needs it, but it is not an answer to the only question a
// first-time user actually has: **can I get this made, and if not, what is
// wrong?** This module is the translation layer that answers it.
//
// Three jobs, all pure so node:test covers them directly:
//
// 1. `groupFindings` — collapse a 694-row DRC wall into a handful of issues,
// each with a plain title, a sentence of meaning, and an honest impact.
// 2. `boardVerdict` — one sentence for the top of the screen: ready to order,
// or not orderable yet and what is left.
// 3. `plainParts` — "the brain", "the USB-C socket", "the indicator LED"
// instead of U3, J1, LED1.
//
// The honesty rules this module is built to keep:
// - `fab.ready` is the ONLY thing that decides whether a board reads as
// orderable. No count, no heuristic, no severity arithmetic overrides it.
// - Severity comes from the sidecar and is never rewritten here. `impact` is
// a *separate* axis about what a finding means for the physical board.
// - A part whose identity we cannot prove is named by what the source file
// says it is, never guessed prettier.
/** Impact — what a finding means for the board you would hold in your hand. */
export const IMPACT = Object.freeze({
BLOCKS: "blocks", // the fab packet will not ship until this is gone
QUALITY: "quality", // it would build, but it is a real risk
COSMETIC: "cosmetic", // it affects how the board looks, not whether it works
TOOLING: "tooling", // it is about the checker's setup, not the board at all
});
/**
* The issue dictionary. Keys are the bracketed code KiCad puts at the head of
* a DRC/ERC detail (`[hole_clearance] Hole clearance violation …`) plus our own
* pipeline's `kind` values for the findings that carry no bracket.
*
* `title` is a claim in plain words — what is wrong, not what rule fired.
* `meaning` is one sentence a non-engineer can act on.
* `impact` is the physical-board axis described above.
*/
const ISSUES = Object.freeze({
// Four more KiCad codes the fleet emits that the dictionary did not carry,
// found by the test below walking every sidecar in the repo rather than by
// anybody remembering.
isolated_copper: {
title: "A piece of copper fill is cut off from its net",
meaning:
"The ground fill got split into an island that no longer touches the rest of the ground. It is dead metal: it does not carry current and it does not shield anything.",
impact: IMPACT.QUALITY,
},
copper_sliver: {
title: "A copper strand thin enough to break off",
meaning:
"A very narrow spike of copper. It can lift during etching and land somewhere it does not belong.",
impact: IMPACT.QUALITY,
},
solder_mask_bridge: {
title: "Two pads share one opening in the mask",
meaning:
"The green coating between two pads is missing, so molten solder can run from one to the other. This is the classic cause of a short that appears only after assembly.",
impact: IMPACT.BLOCKS,
},
hole_to_hole: {
title: "Two drilled holes are too close together",
meaning:
"The wall of board material between them is thin enough to break out while drilling.",
impact: IMPACT.BLOCKS,
},
// --- our own pipeline's kinds --------------------------------------------
//
// Every one of these fell through to the raw-identifier fallback until
// 2026-08-17, when a discoverability judge counted them on the app's own
// demo board: 16 of the 36 codes hydrate-coaster reports had no words,
// including `supplier footprint mismatch warning` 27 times over. A finding
// an engineer cannot read is a finding they learn to scroll past, and the
// ones below are ours — nobody else was going to name them.
supplier_footprint_mismatch_warning: {
title: "The part we ordered is not quite the shape the board expects",
meaning:
"The footprint drawn on the board and the one the supplier lists for this part number differ in size. Usually harmless on passives (an 0402 land pattern is drawn generously); worth a look on anything with fine pins.",
impact: IMPACT.QUALITY,
},
source_part_not_found_warning: {
title: "A part could not be looked up in the supplier catalogue",
meaning:
"The board still builds, but this line of the BOM has no confirmed part behind it, so nobody has checked it is buyable.",
impact: IMPACT.QUALITY,
},
review_decoupling_distant: {
title: "A decoupling capacitor sits far from the pin it protects",
meaning:
"The capacitor is meant to sit right beside its power pin. The further away it is, the less of the noise spike it can absorb.",
impact: IMPACT.QUALITY,
},
review_esd_unprotected: {
title: "A connector pin has nothing protecting it from static",
meaning:
"A pin that reaches the outside world can take a static shock from a finger or a cable. Boards ship like this all the time; it is a reliability call, not a defect.",
impact: IMPACT.QUALITY,
},
review_no_test_point: {
title: "A net nobody can probe",
meaning:
"There is no exposed pad on this net, so if the board misbehaves there is nowhere to put a meter or a scope.",
impact: IMPACT.QUALITY,
},
review_floating_pin: {
title: "A pin is connected to nothing",
meaning:
"An input left floating picks up whatever is in the air around it. If that is deliberate, it is fine; if not, it is a coin toss at power-on.",
impact: IMPACT.QUALITY,
},
thermal_regulator: {
title: "A regulator has to shed real heat",
meaning:
"This part drops voltage by turning the difference into heat. The number in the message is how much, and it decides whether it needs copper around it to spread that heat.",
impact: IMPACT.QUALITY,
},
dfm_power_trace_width: {
title: "A power rail is narrower than the rule for its current",
meaning:
"The track carrying this rail necks down somewhere along its run. Thin copper means voltage lost as heat before it reaches the part.",
impact: IMPACT.QUALITY,
},
power_width_widened: {
title: "A power rail was widened for you",
meaning:
"The pipeline took the gap the router left and made this rail as wide as it legally fits. Nothing to do — it is telling you what changed.",
impact: IMPACT.TOOLING,
},
power_width_refused: {
title: "A power rail could not be widened",
meaning:
"There was no room around the existing track to make it wider without breaking a clearance rule. Moving a part nearby is the lever.",
impact: IMPACT.QUALITY,
},
netclass_trace_width: {
title: "A track is not the width its net class asks for",
meaning:
"This net was given a width rule — because it carries current, or because it is half of a pair — and the routed copper does not meet it.",
impact: IMPACT.QUALITY,
},
netclass_pair_skew: {
title: "The two halves of a signal pair are different lengths",
meaning:
"USB and other fast pairs rely on both wires arriving together. A length difference makes them arrive apart, which shows up as an unreliable link rather than a dead one.",
impact: IMPACT.QUALITY,
},
netclass_pair_coupling: {
title: "A signal pair does not run together",
meaning:
"The two wires of a pair are supposed to stay side by side the whole way. Where they separate, the pair stops behaving like a pair.",
impact: IMPACT.QUALITY,
},
netclass_pair_reference: {
title: "A signal pair has no ground under it",
meaning:
"A fast pair needs unbroken ground beneath it to keep its impedance steady. Over a gap in the ground plane, it does not.",
impact: IMPACT.QUALITY,
},
diffpair_not_routed: {
title: "A signal pair was not routed as a pair",
meaning:
"The two wires were routed as ordinary signals. On USB that usually still enumerates; it is the difference between working and working reliably.",
impact: IMPACT.QUALITY,
},
diffpair_routed: {
title: "A signal pair was routed as a pair",
meaning: "The pass laid this pair down side by side. Nothing to do.",
impact: IMPACT.TOOLING,
},
dfa_edge_clearance: {
title: "A part sits close to the board edge",
meaning:
"Assembly machines hold the board by its edge. A part in that strip can be hard to place and hard to rework by hand.",
impact: IMPACT.QUALITY,
},
dfa_off_board: {
title: "A part is outside the board outline",
meaning: "There is nothing under it to solder to. This is a placement mistake, not a tolerance.",
impact: IMPACT.BLOCKS,
},
dfa_pin_pitch: {
title: "A part has very fine pins",
meaning:
"The gap between pins is small enough that assembly needs more care and rework by hand is difficult. It is a heads-up about cost and yield, not a fault.",
impact: IMPACT.QUALITY,
},
dfa_rotation_watchlist: {
title: "This part is one people fit the wrong way round",
meaning:
"Its orientation in the assembly file is worth checking by eye against the drawing. Diodes, LEDs and connectors are the usual suspects.",
impact: IMPACT.QUALITY,
},
gerber_silk_over_pad: {
title: "Printed text lands on a solderable pad",
meaning:
"Silkscreen ink on a pad stops solder wetting properly. The factory usually clips it, so the label loses a letter rather than the joint failing.",
impact: IMPACT.COSMETIC,
},
gerber_drill_extra: {
title: "The drill file has holes the design does not",
meaning:
"More holes were plotted than the design lists. Usually the pipeline's own via repair adding them after the design was written.",
impact: IMPACT.TOOLING,
},
gerber_mask_sliver_in_footprint: {
title: "A very thin strip of solder mask",
meaning:
"The green coating between two pads is thin enough that it may not survive the process. Two pads it was meant to separate could bridge.",
impact: IMPACT.QUALITY,
},
kicad_normalized: {
title: "The board was tidied before plotting",
meaning:
"Silkscreen was raised to the factory's minimum sizes before the gerbers were made. A record of what changed, not a problem.",
impact: IMPACT.TOOLING,
},
circuit_normalized: {
title: "The compiled board was repaired before it was judged",
meaning:
"The pipeline fixed something in its own output — a dangling via, usually — before running the checks. A record of what changed.",
impact: IMPACT.TOOLING,
},
schematic_truth_normalized: {
title: "The schematic drawing was corrected",
meaning:
"The drawing showed something the copper does not do, and it was redrawn to match. The board itself did not change.",
impact: IMPACT.TOOLING,
},
pour_clearance_repaired: {
title: "The ground pour was pulled back from something",
meaning:
"Copper fill was trimmed where it came too close to a hole or a track. A record of what changed.",
impact: IMPACT.TOOLING,
},
net_reaches_one_part: {
title: "A wire that goes nowhere",
meaning:
"Every pin on this net belongs to the same part, so whatever was meant to be on the other end is not on the board. The copper that exists is correct; the wire that does not exist is the problem.",
impact: IMPACT.QUALITY,
},
net_reaches_nothing: {
title: "A net that connects to nothing at all",
meaning: "This net is named in the design and touches no part.",
impact: IMPACT.QUALITY,
},
// --- copper and drilling: the ones that make a board fail -----------------
hole_clearance: {
title: "A drilled hole sits too close to copper",
meaning:
"The drill could cut into a nearby track. The factory will not guarantee a board like this.",
impact: IMPACT.BLOCKS,
},
clearance: {
title: "Two pieces of copper are too close together",
meaning:
"The gap is smaller than the factory can etch reliably, so the two could end up touching.",
impact: IMPACT.BLOCKS,
},
unconnected_items: {
title: "Something on the board is not wired up",
meaning:
"The schematic says these two points connect; the copper layout does not connect them.",
impact: IMPACT.BLOCKS,
},
copper_edge_clearance: {
title: "Copper runs too close to the board edge",
meaning: "The cutting tool could nick the copper when the board is routed out.",
impact: IMPACT.BLOCKS,
},
shorting_items: {
title: "Two nets are shorted together",
meaning: "Copper that should be separate is touching, which will short the circuit.",
impact: IMPACT.BLOCKS,
},
holes_co_located: {
title: "Two holes are drilled in the same spot",
meaning: "One drill hit does the work of two, so one of these holes is redundant or misplaced.",
impact: IMPACT.QUALITY,
},
hole_near_hole: {
title: "Two holes are drilled too close together",
meaning: "The material between them can break out during drilling.",
impact: IMPACT.QUALITY,
},
track_dangling: {
title: "A track ends in mid-air",
meaning: "A copper track stops without reaching a pad, so it does nothing.",
impact: IMPACT.QUALITY,
},
net_conflict: {
title: "A pad is assigned to the wrong signal",
meaning:
"The copper and the schematic disagree about what this pad connects to. Usually the two need re-syncing, not re-designing.",
impact: IMPACT.QUALITY,
},
track_width: {
title: "A track is thinner than the rule allows",
meaning: "A thin track carries less current and is easier for the factory to break.",
impact: IMPACT.QUALITY,
},
annular_width: {
title: "A pad ring is too thin around its hole",
meaning: "Not enough copper is left around the drill, so the pad can lift off.",
impact: IMPACT.QUALITY,
},
pcb_trace_too_long_warning: {
title: "A track is longer than this design's own limit",
meaning: "It will still build. Long tracks pick up more noise, which matters for fast signals.",
impact: IMPACT.QUALITY,
},
// --- tscircuit's own errors ----------------------------------------------
//
// Watched on a real first build: six issues were listed as what was left to
// fix, and four of them read `pcb trace missing error ×37 — we do not have
// plain words for this check yet`. Honest, and a dead end: the person has
// nothing to act on. These are the codes the generator emits most often, and
// the order they cascade in is the repo's own (`skills/circuitcode/
// references/patterns/fix-a-drc.md`) — placement first, routing second,
// because the routing errors are usually consequences of the placement ones.
pcb_footprint_overlap_error: {
title: "Two parts are sitting on top of each other",
meaning: "They overlap on the board, so they cannot both be soldered where they are. One has to move.",
impact: IMPACT.BLOCKS,
},
pcb_courtyard_overlap_error: {
title: "Two parts are packed too tightly to assemble",
meaning:
"Each part needs a margin of clear space around it for the machine that places it. These two are inside each other's margin.",
impact: IMPACT.BLOCKS,
},
pcb_pad_pad_clearance_error: {
title: "Two solder pads are too close together",
meaning: "Solder would bridge across the gap and short them. Moving one of the parts fixes it.",
impact: IMPACT.BLOCKS,
},
pcb_component_outside_board_error: {
title: "A part hangs off the edge of the board",
meaning: "Some of it sits outside the outline, so it would be cut off. The board has to grow or the part has to move in.",
impact: IMPACT.BLOCKS,
},
pcb_placement_error: {
title: "A part could not be placed",
meaning: "The layout step could not find a spot for this part on the board as drawn.",
impact: IMPACT.BLOCKS,
},
pcb_autorouting_error: {
title: "The wiring could not be drawn",
meaning:
"The step that draws the copper gave up. It usually gives up because two parts overlap — fix those first and this normally goes with them.",
impact: IMPACT.BLOCKS,
},
pcb_trace_missing_error: {
title: "A connection was never drawn on the board",
meaning:
"The wiring diagram asks for this link and no copper was laid down for it. Usually the same cause as the wiring that could not be drawn.",
impact: IMPACT.BLOCKS,
},
pcb_trace_not_connected_error: {
title: "A copper track stops short of what it should reach",
meaning: "The track was drawn but does not arrive at the pad at its far end.",
impact: IMPACT.BLOCKS,
},
pcb_port_not_connected_error: {
title: "A part's pin has nothing attached to it",
meaning:
"This pin is supposed to be wired to something and no copper reaches it. Usually a knock-on from wiring that could not be drawn.",
impact: IMPACT.BLOCKS,
},
pcb_port_not_matched_error: {
title: "A pin in the diagram has no matching pad on the board",
meaning: "The drawing and the part's physical pads disagree about which pins exist.",
impact: IMPACT.BLOCKS,
},
pcb_missing_footprint_error: {
title: "A part has no pads to solder to",
meaning: "This part is in the design but nothing says what its metal contacts look like, so the board has nowhere to put it.",
impact: IMPACT.BLOCKS,
},
source_trace_not_connected_error: {
title: "A wire points at a pin that does not exist",
meaning: "Almost always a mis-typed pin name in the design. The part's own list of pin names is the reference.",
impact: IMPACT.BLOCKS,
},
pcb_trace_clearance_error: {
title: "Two copper tracks run too close together",
meaning: "The gap is smaller than the factory can etch reliably, so the two could end up touching.",
impact: IMPACT.BLOCKS,
},
pcb_pad_trace_clearance_error: {
title: "A track runs too close to a solder pad",
meaning: "Solder could bridge from the pad onto the track. Route the track further away.",
impact: IMPACT.BLOCKS,
},
pcb_via_clearance_error: {
title: "A through-hole sits too close to other copper",
meaning: "The hole that carries a signal between layers does not have enough clear space around it.",
impact: IMPACT.BLOCKS,
},
pcb_via_trace_clearance_error: {
title: "A through-hole sits too close to a track",
meaning: "The hole that carries a signal between layers is nearly touching a nearby track.",
impact: IMPACT.BLOCKS,
},
// --- the factory's own limits (dfm_*) -------------------------------------
// Everything here is measured against JLCPCB's published minimums
// (`circuitpy/fab.py`), so each one is "smaller/closer than they will build",
// never an opinion.
dfm_trace_width: {
title: "A copper track is thinner than the factory will make",
meaning: "Below their minimum width the track may come out broken or missing.",
impact: IMPACT.BLOCKS,
},
dfm_trace_clearance: {
title: "Two pieces of copper are closer than the factory will etch",
meaning: "Below their minimum gap the two can end up joined.",
impact: IMPACT.BLOCKS,
},
dfm_edge_clearance: {
title: "Copper runs too close to the board edge",
meaning: "The tool that cuts the board out could nick the copper.",
impact: IMPACT.BLOCKS,
},
dfm_hole_clearance: {
title: "A hole sits too close to copper",
meaning: "The drill could break into a nearby track.",
impact: IMPACT.BLOCKS,
},
dfm_drill_size: {
title: "A hole is smaller than the factory can drill",
meaning: "Their smallest drill is bigger than this hole, so it cannot be made as drawn.",
impact: IMPACT.BLOCKS,
},
dfm_via_diameter: {
title: "A layer-to-layer hole is smaller than the factory can make",
meaning: "The hole that carries a signal between layers is below their minimum size.",
impact: IMPACT.BLOCKS,
},
dfm_annular_ring: {
title: "A pad ring is too thin around its hole",
meaning: "Not enough copper is left around the drill, so the pad can tear off.",
impact: IMPACT.BLOCKS,
},
dfm_board_size: {
title: "The board is outside the sizes this factory makes",
meaning: "It is either smaller or larger than their range for this service.",
impact: IMPACT.BLOCKS,
},
dfm_thickness: {
title: "The board thickness is not one the factory offers",
meaning: "Pick one of their standard thicknesses instead.",
impact: IMPACT.BLOCKS,
},
// --- parts on the board ---------------------------------------------------
missing_footprint: {
title: "A part in the schematic has nothing to solder to",
meaning: "The drawing has this part but the board has no pads for it.",
impact: IMPACT.QUALITY,
},
extra_footprint: {
title: "The board has pads for a part that is not in the schematic",
meaning: "Something is on the board that the drawing does not know about.",
impact: IMPACT.QUALITY,
},
duplicate_footprints: {
title: "Two parts share the same name",
meaning: "Two footprints carry one reference, so the assembly house cannot tell them apart.",
impact: IMPACT.QUALITY,
},
footprint_symbol_mismatch: {
title: "A part's pads and its symbol disagree",
meaning:
"The board and the schematic describe the same part differently. It is a bookkeeping mismatch between two files, not a wiring fault.",
impact: IMPACT.TOOLING,
},
footprint_symbol_field_mismatch: {
title: "A part's text fields differ between the drawing and the board",
meaning: "A description or value is spelled differently in the two files. It changes nothing physical.",
impact: IMPACT.TOOLING,
},
footprint_type_mismatch: {
title: "A part is marked as a different mounting type in each file",
meaning: "Through-hole versus surface-mount is recorded inconsistently. Cosmetic to the fab.",
impact: IMPACT.TOOLING,
},
part_not_orderable: {
title: "A part cannot be ordered",
meaning: "No supplier number is pinned for this part, so nobody can buy it to build the board.",
impact: IMPACT.BLOCKS,
},
extended_part: {
title: "A part costs extra to place",
meaning:
"JLCPCB charges a one-off fee per non-stock part. It builds fine; it just costs more.",
impact: IMPACT.QUALITY,
},
part_drift: {
title: "A part changed since it was last checked",
meaning: "The stock or price behind this part has moved. Worth re-checking before ordering.",
impact: IMPACT.QUALITY,
},
// --- printing on the board (silkscreen) -----------------------------------
silk_overlap: {
title: "Printed labels overlap each other",
meaning: "The white text on the board will be hard to read here. The board works the same.",
impact: IMPACT.COSMETIC,
},
silk_over_copper: {
title: "Printed text sits on bare metal",
meaning: "Ink over an exposed pad rubs off. Looks only.",
impact: IMPACT.COSMETIC,
},
silk_edge_clearance: {
title: "Printed text runs off the board edge",
meaning: "Part of a label will be cut away when the board is routed out. Looks only.",
impact: IMPACT.COSMETIC,
},
text_height: {
title: "Some printed text is smaller than the factory prints",
meaning: "Those labels may come out blurred or missing. Nothing electrical changes.",
impact: IMPACT.COSMETIC,
},
text_thickness: {
title: "Some printed text is thinner than the factory prints",
meaning: "Same as above — the ink may not take. Nothing electrical changes.",
impact: IMPACT.COSMETIC,
},
// --- the schematic drawing ------------------------------------------------
endpoint_off_grid: {
title: "A wire in the drawing ends slightly off the grid",
meaning: "Tidiness in the schematic sheet. It does not reach the board.",
impact: IMPACT.TOOLING,
},
unconnected_wire_endpoint: {
title: "A wire in the drawing stops short",
meaning: "A drawn line ends without touching anything. Check it is not a connection you meant.",
impact: IMPACT.COSMETIC,
},
wire_dangling: {
title: "A wire in the drawing connects to nothing",
meaning: "Leftover line work on the schematic sheet.",
impact: IMPACT.COSMETIC,
},
label_dangling: {
title: "A label in the drawing is attached to nothing",
meaning: "A net name floats free on the sheet.",
impact: IMPACT.COSMETIC,
},
isolated_pin_label: {
title: "A label touches only one pin",
meaning: "A named signal that goes nowhere else. Often deliberate, sometimes a missed connection.",
impact: IMPACT.COSMETIC,
},
pin_not_connected: {
title: "A chip pin is left unconnected",
meaning: "Most chips have pins that are meant to be left alone. Worth a glance, rarely a fault.",
impact: IMPACT.COSMETIC,
},
power_pin_not_driven: {
title: "A power pin has no supply feeding it",
meaning: "The checker cannot find where this pin gets its voltage from.",
impact: IMPACT.QUALITY,
},
pin_to_pin: {
title: "Two pins are connected that should not be",
meaning: "For example two outputs driving each other. Worth reading closely.",
impact: IMPACT.QUALITY,
},
duplicate_reference: {
title: "Two parts in the drawing share one name",
meaning: "Reference names have to be unique for the assembly house to place parts.",
impact: IMPACT.QUALITY,
},
// --- the checker itself, not the board ------------------------------------
lib_symbol_issues: {
title: "The checker is missing a symbol library",
meaning: "KiCad on this machine does not have the library, so it reports every part that uses it. Nothing is wrong with the board.",
impact: IMPACT.TOOLING,
},
lib_footprint_issues: {
title: "The checker is missing a footprint library",
meaning: "Same as above — a missing library on this machine, not a fault in the design.",
impact: IMPACT.TOOLING,
},
library_symbol_mismatch: {
title: "A symbol differs from the library copy",
meaning: "The drawing uses an edited version of a stock symbol. Normal for generated boards.",
impact: IMPACT.TOOLING,
},
unverified_gerbers: {
title: "The factory files have not been checked",
meaning:
"The gerbers were produced without KiCad verifying them, so nobody has confirmed the factory would read them correctly.",
impact: IMPACT.BLOCKS,
},
check_failed: {
title: "A check could not finish",
meaning:
"One step of the build stopped before it could give an answer, so this part of the board was not examined. Not a pass — an absence.",
impact: IMPACT.BLOCKS,
},
// The opposite of the row above, and it used to share it. A repair pass that
// ran, saw the whole board and chose to change nothing has examined
// everything and withheld nothing; the condition it left alone is still
// measured by the gate that owns it.
repair_declined: {
title: "An automatic fix decided not to act",
meaning:
"The build tried to repair something, looked at the surrounding copper, and found no change it could make safely — so it left the board as the router drew it and let the normal checks judge it. Nothing was skipped.",
impact: IMPACT.QUALITY,
},
// --- the router asking for a decision --------------------------------------
// Not a defect. The connections it is about are already reported as their own
// blocking findings; this row is the *reason* they failed, and the panel
// renders it as a request rather than a violation (lib/routingHelp.js).
routing_needs_a_decision: {
title: "The wiring needs a decision from you",
meaning:
"Some connections could not be drawn, and the board was measured to find out why. The request above says what would open the way.",
impact: IMPACT.QUALITY,
},
});
const BRACKET_CODE_RE = /^\s*\[([a-z0-9_]+)\]/i;
/**
* The issue code for a finding: the bracketed code KiCad writes at the head of
* its message, else the pipeline's own `kind`. Lower-cased; "" when neither.
*/
export function issueCode(finding) {
const detail = String(finding?.detail || "");
const bracket = BRACKET_CODE_RE.exec(detail);
if (bracket) return bracket[1].toLowerCase();
const kind = String(finding?.kind || "").trim().toLowerCase();
// `drc_violation` / `erc_violation` are containers, not codes — a finding
// that reaches here with one of those and no bracket has nothing better.
return kind;
}
/** Strip the leading `[code] ` so the detail reads as a sentence. */
export function issueDetailText(finding) {
return String(finding?.detail || "").replace(BRACKET_CODE_RE, "").trim();
}
/**
* The plain-language entry for a code. Unknown codes get an honest fallback:
* the code itself, spaced out, and a `meaning` that says we do not have words
* for it rather than inventing some.
*/
export function plainIssue(code) {
const key = String(code || "").toLowerCase();
const known = ISSUES[key];
if (known) return { code: key, known: true, ...known };
return {
code: key,
known: false,
title: key ? key.replace(/_/g, " ") : "Unrecognised finding",
meaning: "",
impact: IMPACT.QUALITY,
};
}
const IMPACT_RANK = { blocks: 0, quality: 1, cosmetic: 2, tooling: 3 };
const SEVERITY_RANK = { error: 0, warning: 1, info: 2 };
/**
* Collapse message rows into one group per issue code.
*
* This is the single biggest thing standing between a non-engineer and this
* tool: 694 rows of `[text_height] Text height out of range (…)` is not
* information, it is weather. Nine groups with counts is.
*
* Each group keeps its rows, so the detailed view is one expand away and
* nothing is hidden.
*
* @param {Array<object>} rows buildMessages() output (or normalized warnings)
* @returns {Array<{code,title,meaning,impact,severity,count,blocking,rows,parts,sample}>}
*/
/**
* The name of the thing a finding is about, short enough to sit in a chip.
*
* KiCad names its own objects, and it names them for KiCad: a row's `part` can
* arrive as `Track [DVDD] on F.Cu, length 0.2973 mm`. Three of the four chips
* under one issue on a real board read like that, which turns the "where" line
* into noise — and `F.Cu` is not a thing anyone can be expected to know.
* A reference designator (`U3`, `C6`) is left exactly as it is; only KiCad's
* sentences are shortened, and only to what they identify.
*/
export function shortPartName(value) {
const text = String(value || "").trim();
if (!text || text.length < 12) return text;
const track = /^Track\s+\[([^\]]+)\]/i.exec(text);
if (track) return `track ${track[1]}`;
const via = /^(?:Via|PTH|NPTH)\s+\[([^\]]+)\]/i.exec(text);
if (via) return `hole ${via[1]}`;
const pad = /^Pad\s+(\S+)\s+\[[^\]]*\]\s+of\s+(\S+)/i.exec(text);
if (pad) return `${pad[2]}.${pad[1]}`;
const zone = /^Zone\s+\[([^\]]+)\]/i.exec(text);
if (zone) return `copper fill ${zone[1]}`;
// Anything else keeps its own words; a trailing ", length …mm" clause never
// identifies anything, so it goes.
return text.replace(/,\s*length\s+[\d.]+\s*mm\s*$/i, "").trim();
}
export function groupFindings(rows) {
const list = Array.isArray(rows) ? rows : [];
const groups = new Map();
for (const row of list) {
const code = issueCode(row);
const key = code || "unknown";
let group = groups.get(key);
if (!group) {
const plain = plainIssue(code);
group = {
code: key,
title: plain.title,
meaning: plain.meaning,
impact: plain.impact,
known: plain.known,
severity: "info",
count: 0,
blocking: false,
rows: [],
parts: [],
sample: "",
};
groups.set(key, group);
}
group.count += 1;
group.rows.push(row);
const severity = String(row?.severity || "warning").toLowerCase();
// A group takes the worst severity any of its rows carries — the sidecar
// stays the authority, we only aggregate it.
if ((SEVERITY_RANK[severity] ?? 1) < (SEVERITY_RANK[group.severity] ?? 1)) {
group.severity = severity;
}
if (severity === "error" || key === "unverified_gerbers" || key === "check_failed") {
group.blocking = true;
}
if (!group.sample) group.sample = issueDetailText(row);
const part = shortPartName(row?.part);
if (part && part !== "board" && group.parts.length < 24 && !group.parts.includes(part)) {
group.parts.push(part);
}
}
// The dictionary says what a code MEANS for the board; the sidecar says
// whether it BLOCKS. When they disagree the sidecar wins: `dfa_off_board`
// is a blocker when a part sits outside the outline, and an info note when
// a USB-C keep-out hangs 0.48mm past an edge it is meant to hang past. On
// 2026-09-09 a fab-ready board read "1 stop the order" for exactly that
// note, next to a green "Ready to order" — two answers on one screen.
for (const group of groups.values()) {
if (!group.blocking && group.impact === IMPACT.BLOCKS) {
group.impact = IMPACT.QUALITY;
}
}
return [...groups.values()].sort(
(a, b) =>
Number(b.blocking) - Number(a.blocking) ||
(IMPACT_RANK[a.impact] ?? 1) - (IMPACT_RANK[b.impact] ?? 1) ||
(SEVERITY_RANK[a.severity] ?? 1) - (SEVERITY_RANK[b.severity] ?? 1) ||
b.count - a.count,
);
}
/** Counts by impact across groups: {blocks, quality, cosmetic, tooling, total}. */
export function impactCounts(groups) {
const out = { blocks: 0, quality: 0, cosmetic: 0, tooling: 0, total: 0 };
for (const group of Array.isArray(groups) ? groups : []) {
const bucket = group.blocking ? IMPACT.BLOCKS : group.impact;
out[bucket] = (out[bucket] || 0) + group.count;
out.total += group.count;
}
return out;
}
/** English list: ["a"] → "a"; ["a","b"] → "a and b"; more → "a, b and c". */
export function joinWords(items, conjunction = "and") {
const list = (Array.isArray(items) ? items : []).filter(Boolean);
if (!list.length) return "";
if (list.length === 1) return String(list[0]);
return `${list.slice(0, -1).join(", ")} ${conjunction} ${list[list.length - 1]}`;
}
/** "1 thing" / "3 things" — plurals without a library. */
export function plural(count, one, many = `${one}s`) {
const n = Number(count) || 0;
return `${n} ${n === 1 ? one : many}`;
}
/**
* The verdict: the one line at the top of the screen that answers "can I get
* this made?".
*
* The gate is `fab.ready` and nothing else. When the sidecar has not been read
* yet we say so; we never fill the gap with an optimistic guess.
*
* A build that *failed* is its own answer and outranks everything below it.
* Without this case the strip fell back to "No build to judge yet" while the
* tree three inches away said the build had stopped — seen in a real run, and
* worse still on a project whose earlier build succeeded, where a stale sidecar
* would have kept saying "Ready to order" after a crash.
*
* **Every dead end carries an `action`.** A board source can sit in a project
* with no build behind it — the turn wrote `boards/main.tsx` and then stopped,
* or built in a scratch copy and left nothing here. Watched on a real run: the
* strip said "No build to judge yet. Once the board builds, this line says
* whether it can be ordered", every tab was empty, no turn was running, and
* nothing on the screen said what would make a build happen. True, and a dead
* end. The three tones that describe an absent board now carry the sentence
* that ends it, ready for the chat box.
*
* @param {{sidecar?: object|null, groups?: Array<object>, building?: boolean,
* buildLine?: {tone: string, text: string, detail: string}|null,
* boardName?: string,
* help?: {headline: string, line: string,
* action: {label: string, request: string}|null}|null}} input
* @returns {{
* tone: "ready"|"blocked"|"building"|"failed"|"unknown",
* headline: string,
* line: string,
* blockingGroups: Array<object>,
* blockingCount: number,
* action: {label: string, request: string}|null,
* }}
*/
export function boardVerdict({
sidecar = null,
groups = [],
building = false,
buildLine = null,
boardName = "",
turnActive = false,
help = null,
} = {}) {
const blockingGroups = (Array.isArray(groups) ? groups : []).filter((g) => g.blocking);
const blockingCount = blockingGroups.reduce((sum, g) => sum + g.count, 0);
// Never offer to start what is already running. The pipeline writes its
// first status record a minute into a build turn, so `building` is false
// for the whole opening stretch — long enough that the button appeared
// under a board that was being built as you read it.
const buildAction = (label) => (turnActive ? null : { label, request: buildRequest(boardName) });
if (building) {
return {
tone: "building",
// Not "about a minute and a half". That was true of a three-block board
// and wrong by a factor of ten on anything with a microcontroller on it,
// and the sentence was still on screen nine minutes into a compile.
// The stage name and the clock replace it wherever a build line exists;
// this is the fallback, and it promises nothing it cannot keep.
headline: "Working on it",
line: "The board is being designed and checked.",
blockingGroups,
blockingCount,
action: null,
};
}
const buildTone = String(buildLine?.tone || "");
if (buildTone === "failed" || buildTone === "stale") {
const why = String(buildLine?.detail || "").trim();
return {
tone: "failed",
headline: buildTone === "failed" ? "The last build failed" : "The last build stopped",
line: sidecar
? `Nothing new was produced, so this is the build before it.${why ? ` ${why}.` : ""}`
: `No board came out of it.${why ? ` ${why}.` : ""}`,
blockingGroups,
blockingCount,
action: buildAction("Build it again"),
};
}
if (!sidecar) {
// A build can finish without leaving a board here: the agent's own check
// runs in a scratch copy, and until it writes one into the project there
// is nothing to judge. Saying "no build yet" beside a line that reads
// "Built · 6m 49s" is the kind of small contradiction that costs trust, so
// when a build has just finished the sentence says which fact is which.
// `done-blocked` is the same fact with a worse outcome — a build that
// finished carrying problems. Both mean "a build happened".
if (buildTone === "done" || buildTone === "done-blocked") {
return {
tone: "unknown",
headline: "Nothing to judge yet",
line: "A build finished, but no board file has landed in this project. Until one does there is nothing to check or order.",
blockingGroups,
blockingCount,
action: buildAction("Build it here"),
};
}
return {
tone: "unknown",
headline: "No build to judge yet",
line: turnActive
? "Nothing has been built yet. The chat is working — the board appears here the moment it is made."
: "The board program is written but has never been built, so there is nothing to check or order.",
blockingGroups,
blockingCount,
action: buildAction("Build it"),
};
}
if (sidecar?.source?.engine === "kicad-native") {
const packet = sidecar.native?.manufacturing;
if (sidecar.fab?.ready === true && packet?.prototypeReady === true) return {
tone: "ready", headline: "Ready for prototype order",
line: "Native CAD, engineering review and the manufacturing packet passed their checks. Physical hardware has not been tested.",
blockingGroups, blockingCount, action: null,
};
return {
tone: "blocked",
headline: "Prototype order blocked",
line: packet?.prototypeReady ? "The packet checks passed for an earlier revision; the board or its packet changed since. Rebuild to check the current files." : packet ? `${(packet.findings || []).filter(f => f.severity === 'error').length} blocking manufacturing findings remain. Read the manufacturing report for the required changes.` : "The native manufacturing review has not run. Passing native CAD checks alone does not enable ordering.",
blockingGroups,
blockingCount,
action: null,
};
}
if (sidecar?.fab?.ready === true) {
// A ready board can still carry cosmetic and checker-setup notes. Saying
// "every check passed" when 60 findings are on screen would read as a lie
// the moment anyone scrolled, so the count goes in the sentence.
const rest = (Array.isArray(groups) ? groups : []).reduce((sum, g) => sum + g.count, 0);
const tail = rest
? ` ${plural(rest, "note")} left in the checks, none of which stop the order.`
: " Nothing outstanding.";
return {
tone: "ready",
headline: "Ready to order",
line: `The factory files are made and verified — send this to JLCPCB as it is.${tail}`,
blockingGroups,
blockingCount,
action: null,
};
}
// Not ready. Say what is left, in the order a person would fix it.
//
// When the thing that is left is missing copper, the router's own diagnosis
// outranks the finding list: "a connection was never drawn, in 7 places" is
// a symptom, and `routingHelp` carries the measured cause and the decision
// that would clear it. A request the person can act on beats a count they
// cannot. Everything else about the strip is unchanged — `fab.ready` is
// still the only thing that decides whether it reads as orderable.
if (help?.headline) {
return {
tone: "blocked",
headline: help.headline,
line: help.line,
blockingGroups,
blockingCount,
action: help.action || null,
};
}
const headline = blockingGroups.length
? `Not orderable yet — ${plural(blockingGroups.length, "thing")} to fix`
: "Not orderable yet";
const first = blockingGroups[0];
const line = first
? `${first.title}${first.count > 1 ? `, in ${first.count} places` : ""}. ${first.meaning}`
: "The build did not produce a verified factory packet. Rebuild the board to try again.";
return { tone: "blocked", headline, line, blockingGroups, blockingCount, action: null };
}
/**
* The sentence a long wait earns, or "".
*
* Only `compile` gets one, because it is the only stage we have measured going
* long: it routes the board, and at 5× router effort the defect ledger records
* 1240s on harness-puck against ~90s at the default. Its quiet limit is 45
* minutes for that reason, so nothing else on screen changes for a quarter of
* an hour. Every other stage stays silent — a reassuring sentence we cannot
* support is worse than none, and the clock beside it already says the wait is
* real.
*/
export function buildWaitNote({ stage = "", elapsedS = 0 } = {}) {
if (String(stage) !== "compile" || !(Number(elapsedS) > 120)) return "";
return (
"Laying out the copper is the slow part. A board with a microcontroller " +
"on it can spend fifteen minutes here, and the router's harder second " +
"attempt longer still. Nothing has failed — the chat is still working."
);
}
/**
* The words that make a build happen, ready for the chat box.
*
* Written for the person who has never used this app: it names the file, asks
* for the checks, and — the part that matters most on a turn that already died
* once — asks for the reason rather than another silent stop.
*/
export function buildRequest(boardName = "") {
const stem = String(boardName || "").trim() || "main";
return (
`Build boards/${stem}.tsx and run the checks. ` +
"If it will not build, say what stopped it in plain words."
);
}
/**
* The chat request a group's Fix button writes. Names the issue in plain
* words, then hands over the exact code, count and parts so the model repairs
* the real thing rather than the paraphrase.
*/
/**
* Findings about copper — fixed on the routed board with the generator's
* repair mode (`--edits`), not by rebuilding from the TSX. A rebuild re-routes
* every net and moves the defect (2026-09-10: twelve rebuilds on one via,
* thirty seconds by repair). Width and placement findings stay rebuilds: an
* edit cannot widen a track or move a part.
*/
export const COPPER_REPAIR_CODES = new Set([
"pcb_trace_error",
"pcb_via_trace_clearance_error",
"pcb_trace_too_long_warning",
"crystal_net_routed_long",
"crystal_net_routed_tight",
"dfm_hole_clearance",
"drc_violation",
"clearance_no_margin",
"clearance_under_fab_floor",
"trace_clearance_unrelieved",
"netclass_pair_coupling",
"netclass_pair_reference",
// KiCad DRC rules the grouping surfaces as the code (a `drc_violation`
// row's `[rule]`): the copper ones.
"clearance",
"hole_clearance",
"shorting_items",
"copper_edge_clearance",
"track_dangling",
"via_dangling",
"hole_to_hole",
"copper_sliver",
]);
export function groupFixRequest(group, { board = "" } = {}) {
if (!group) return "";
const where = group.parts.length
? ` Affected: ${group.parts.slice(0, 12).join(", ")}${group.parts.length > 12 ? ", …" : ""}.`
: "";
const boardName = String(board || "").trim();
const how = COPPER_REPAIR_CODES.has(String(group.code || ""))
? " This is copper: repair it in place on the routed board with the generator's" +
" repair mode (`scripts/circuit <board.tsx> --edits <edits.json>`, then the checks" +
" re-run in ~30s). Do not rebuild from the TSX for this — that re-routes every" +
" net and moves the defect. Rebuild only if a part must move."
: " Then rebuild and re-run the checks.";
return [
`Fix ${group.count === 1 ? "this" : `all ${group.count}`} "${group.title.toLowerCase()}"`,
boardName ? ` on ${boardName}` : "",
` (${group.code}).`,
group.sample ? ` Example: ${group.sample}` : "",
where,
how,
].join("");
}
// --- what am I looking at -------------------------------------------------
/**
* Part roles, in the order they should be read. `id` is stable for tests,
* `label` is the plain name, `blurb` says what the thing does in one clause.
*/
const ROLE_ORDER = [
"brain",
"power_in",
"power_reg",
"memory",
"sensor",
"radio",
"driver",
"indicator",
"control",
"clock",
"protection",
"passive",
"mechanical",
"other",
];
const ROLES = Object.freeze({
brain: { label: "The brain", blurb: "runs the program and drives everything else" },
power_in: { label: "Power in", blurb: "where the cable plugs in" },
power_reg: { label: "Power supply", blurb: "turns the input voltage into what the chips need" },
memory: { label: "Memory", blurb: "where the program is stored" },
sensor: { label: "Sensors", blurb: "how the board reads the world" },
radio: { label: "Radio", blurb: "wireless link" },
driver: { label: "Drivers", blurb: "push real power out to motors, speakers or lights" },
indicator: { label: "Lights", blurb: "what the board shows you" },
control: { label: "Controls", blurb: "what you press" },
clock: { label: "Clock", blurb: "keeps the chip in time" },
protection: { label: "Protection", blurb: "guards the board against static and bad cables" },
passive: { label: "Supporting parts", blurb: "resistors, capacitors and diodes that make the rest behave" },
mechanical: { label: "Holes and test points", blurb: "for screws and for probing" },
other: { label: "Other parts", blurb: "" },
});
// Manufacturer-part patterns worth naming. Deliberately conservative: these
// are families anyone in the field would recognise on sight, and a miss simply
// falls through to the ftype, which came out of the source file and is always
// true.
const MPN_ROLES = [
[/^(RP2040|RP2350)/i, "brain"],
[/ESP32|ESP8266/i, "brain"],
[/^STM32|^GD32|^CH32|^APM32/i, "brain"],
[/^ATMEGA|^ATTINY|^ATSAM|^SAMD/i, "brain"],
[/^NRF5|^NRF52|^NRF91/i, "brain"],
[/^RA4M|^MSP430|^PIC(16|18|32)/i, "brain"],
[/AMS1117|LM1117|LD1117|XC6206|RT9013|ME6211|HT73|TPS6|MP15|MP23|SGM2212|AP2112|NCP170/i, "power_reg"],
[/TP4056|BQ2405|MCP7383|IP5306|CN3065/i, "power_reg"],
[/^W25Q|^GD25|^MX25|^AT24C|^24LC|^IS25|^EN25/i, "memory"],
[/USBLC|^ESDA|^SP0503|^PESD|^SRV05|^ULC/i, "protection"],
[/WS2812|SK6812|APA102|SK9822/i, "indicator"],
[/BME280|BMP280|BME680|SHT[234]|SHTC3|AHT[12]|DHT[12]|SCD4|SGP[34]|CCS811/i, "sensor"],
[/MPU6|ICM2|LSM6|LIS3|BMI[12]|QMC5883|HMC5883/i, "sensor"],
[/VL53|TOF|APDS9|VEML|BH1750|TSL25/i, "sensor"],
[/TMP1[01]|DS18B20|LM75|MAX31855|MAX6675|INA2[12]|ACS712/i, "sensor"],
[/DRV8|TB6612|L293|A4988|TMC2|BTS7960|MOSFET DRIVER/i, "driver"],
[/MAX98|PAM8|TPA2|NS4168/i, "driver"],
[/^NRF24|^RFM9|^SX12|^LORA|^SIM800|^SIM7|^EC200/i, "radio"],
[/TYPE-C|USB-?C|USB4110|^HRO-TYPE|MICRO-?USB|^USB[- ]?A/i, "power_in"],
];
const FTYPE_ROLES = {
simple_resistor: "passive",
simple_capacitor: "passive",
simple_inductor: "passive",
simple_diode: "passive",
simple_fuse: "protection",
simple_led: "indicator",
simple_push_button: "control",
simple_switch: "control",
simple_rotary_encoder: "control",
simple_potentiometer: "control",
simple_crystal: "clock",
simple_resonator: "clock",
simple_oscillator: "clock",
simple_connector: "power_in",
simple_pin_header: "power_in",
simple_battery: "power_in",
simple_test_point: "mechanical",
simple_mosfet: "driver",
simple_transistor: "driver",
simple_chip: "other",
};
// Refdes prefixes, the last resort before "other". IEEE-315 letters.
const REFDES_ROLES = {
R: "passive",
C: "passive",
L: "passive",
D: "passive",
LED: "indicator",
U: "other",
IC: "other",
Q: "driver",
J: "power_in",
P: "power_in",
SW: "control",
BTN: "control",
Y: "clock",
X: "clock",
F: "protection",
TP: "mechanical",
H: "mechanical",
MH: "mechanical",
B: "power_in",
BT: "power_in",
};
/** "LED12" → "LED"; "R1" → "R"; "" when the name has no letter prefix. */
export function refdesPrefix(refdes) {
const match = /^([A-Za-z]+)\d*$/.exec(String(refdes || "").trim());
return match ? match[1].toUpperCase() : "";
}
/**
* The role of one component. MPN first (it identifies the actual part), then
* the source file's own `ftype`, then the reference-designator letter.
*
* @returns {{role: string, label: string, blurb: string, why: "mpn"|"ftype"|"refdes"|"none"}}
*/
export function partRole(component) {
const mpn = String(component?.mpn || "").trim();
if (mpn) {
for (const [pattern, role] of MPN_ROLES) {
if (pattern.test(mpn)) return { role, ...ROLES[role], why: "mpn" };
}
}
const ftype = String(component?.ftype || "").trim().toLowerCase();
if (ftype && FTYPE_ROLES[ftype] && FTYPE_ROLES[ftype] !== "other") {
const role = FTYPE_ROLES[ftype];
return { role, ...ROLES[role], why: "ftype" };
}
const prefix = refdesPrefix(component?.refdes);
if (prefix && REFDES_ROLES[prefix] && REFDES_ROLES[prefix] !== "other") {
const role = REFDES_ROLES[prefix];
return { role, ...ROLES[role], why: "refdes" };
}
return { role: "other", ...ROLES.other, why: "none" };
}
/**
* The one-line description of a single part: what it is, in the words a
* non-engineer would use, with the real part number kept beside it so an
* engineer can check the claim.
*/
export function partPlainName(component) {
const mpn = String(component?.mpn || "").trim();
const value = String(component?.value || "").trim();
const ftype = String(component?.ftype || "").replace(/^simple_/, "").replace(/_/g, " ");
const role = partRole(component);
if (role.why === "mpn") {
const singular = {
brain: "Microcontroller",
power_reg: "Voltage regulator",
memory: "Flash memory",
protection: "Protection chip",
indicator: "Addressable RGB LED",
sensor: "Sensor",
driver: "Driver chip",
radio: "Radio module",
power_in: "USB-C socket",
}[role.role];
if (singular) return singular;
}
if (value) return `${capitalize(ftype || "Part")} ${value}`;
if (mpn) return mpn;
return capitalize(ftype || "Part");
}
function capitalize(text) {
const value = String(text || "");
return value ? value[0].toUpperCase() + value.slice(1) : "";
}
/**
* The whole board as a plain-English part list, grouped by role and ordered so
* the interesting things come first: the brain, then power, then everything it
* talks to, and the resistors and capacitors last where they belong.
*
* @param {object|null} index buildBoardIndex output
* @returns {Array<{role,label,blurb,count,items:Array<{key,refdes,name,mpn,value}>}>}
*/
export function plainParts(index) {
const components = Array.isArray(index?.components) ? index.components : [];
const buckets = new Map();
for (const component of components) {
const role = partRole(component);
let bucket = buckets.get(role.role);
if (!bucket) {
bucket = { role: role.role, label: role.label, blurb: role.blurb, count: 0, items: [] };
buckets.set(role.role, bucket);
}
bucket.count += 1;
bucket.items.push({
key: component.key,
refdes: component.refdes,
name: partPlainName(component),
mpn: String(component.mpn || ""),
value: String(component.value || ""),
lcsc: String(component.lcsc || ""),
});
}
for (const bucket of buckets.values()) {
bucket.items.sort((a, b) =>
String(a.refdes).localeCompare(String(b.refdes), undefined, { numeric: true, sensitivity: "base" }),
);
}
return ROLE_ORDER.map((role) => buckets.get(role)).filter(Boolean);
}
/**
* "A 70 × 70 mm two-layer board with 58 parts on it." — the size sentence,
* built only from numbers the sidecar and the index actually carry.
*/
export function boardShapeLine({ sidecar = null, index = null } = {}) {
const width = Number(sidecar?.board?.widthMm);
const height = Number(sidecar?.board?.heightMm);
const layers = Number(sidecar?.board?.layers);
const parts = Array.isArray(index?.components) ? index.components.length : 0;
const bits = [];
if (Number.isFinite(width) && Number.isFinite(height) && width > 0 && height > 0) {
bits.push(`${trimNumber(width)} × ${trimNumber(height)} mm`);
}
if (Number.isFinite(layers) && layers > 0) bits.push(layers === 2 ? "2 copper layers" : `${layers} copper layers`);
if (parts) bits.push(plural(parts, "part"));
return bits.join(" · ");
}
function trimNumber(value) {
const n = Number(value);
if (!Number.isFinite(n)) return "";
return Number.isInteger(n) ? String(n) : n.toFixed(1);
}
/**
* Parts cost per board from the parts-book lock: unit price × how many of that
* part the board uses. Returns null when parts.json has no prices — an
* estimate we cannot source is worse than no number at all.
*
* @param {Array<object>} parts normalizeParts() output, with `refdes` preserved
* @param {object|null} index buildBoardIndex output, for the placement count
*/
export function partsCostUsd(parts, index) {
const list = Array.isArray(parts) ? parts : [];
if (!list.length) return null;
let total = 0;
let priced = 0;
let unpriced = 0;
for (const part of list) {
const count = Array.isArray(part?.refdes) && part.refdes.length ? part.refdes.length : 1;
const price = Number(part?.unitPriceUsd);
if (Number.isFinite(price) && price > 0) {
total += price * count;
priced += 1;
} else {
unpriced += 1;
}
}
if (!priced) return null;
return { usd: total, priced, unpriced, complete: unpriced === 0, index: index ? true : false };
}
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