Rules catalog

The EE rule catalog. Each rule links to its full reference: what it means, why it matters, the guards it applies, and a fires-versus-fine diagram. The Source column flags where a rule comes from: a built-in, a design-intent check (intent/), a datalog-authored rule (dl/), or an interface profile (profile/). This page is generated from the shipped catalog, so it always matches the engine.

connectivity ¶

Rule	Source	Severity	What it checks
crystal-load-caps	built-in	warning	A passive crystal has an oscillator terminal with no load capacitor to ground.
dangling-endpoint	built-in	warning	A wire endpoint terminates on nothing (no pin, junction, label, or other wire).
dl/power-pin-mistyped	datalog	warning	A pin named like power/ground but not typed power_in sits alone on its net.
duplicate-net-name	built-in	warning	Two electrically distinct nets carry the same name.
duplicate-ref-des	built-in	error	A reference designator is claimed by more than one distinct physical part.
floating-input	built-in	warning	An input pin sits on a net with no driver and no pull, so its level is undefined.
i2c-pull-up	built-in	error	An I2C net (SDA/SCL) reaches no rail through a pull-up resistor.
i2c-pull-up-split-rail	built-in	warning	An I2C net is pulled up to two different rails.
i2c-redundant-pull-up	built-in	warning	An I2C net is pulled to one rail by more than one resistor.
label-alias-conflict	built-in	warning	One net carries two different sheet-scoped labels in the same scope.
led-polarity	built-in	error	An LED’s anode sits on ground and its cathode on a power rail, mounted backwards.
nc-pin-connected	built-in	error	A pin marked no-connect is wired into a net with other members.
output-output-conflict	built-in	error	Two or more driving pins (outputs / power sources) share a net and fight each other.
profile/esd	profile	warning	An interface signal leaves the board through a connector with no ESD clamp.
profile/missing-pullup	profile	warning	An interface signal that needs a pull-up reaches no rail.
profile/signal-dangling	profile	warning	An interface signal net has fewer than two connections (a dangling stub).
profile/signal-missing	profile	error	A signal a required interface declares is absent from the design.
profile/termination	profile	warning	A bus that requires termination has no terminating device across its pair.
resonator-redundant-load-caps	built-in	warning	A ceramic resonator with integrated load capacitors also has an external load cap to ground on a terminal.
single-pin-net	built-in	info	A net connects to fewer than two pins (a floating stub), and is not an intentional no-connect.
unconnected-component	built-in	warning	A component appears on no net (none of its pins land on any signal).
unconnected-pin	built-in	warning	A pin lands on no net and is not marked no-connect.
unspecified-pin-with-driver	built-in	warning	A pin with no declared electrical type sits on a driven net.
wire-no-junction	built-in	warning	A wire endpoint lands mid-span on another wire with no junction dot.

power ¶

Rule	Source	Severity	What it checks
bulk-cap	built-in	warning	A named power rail carries no capacitor at all (no bulk reservoir).
decoupling-present	built-in	warning	A power rail feeds power-input pins but has no decoupling capacitor on it.
esd-clamp-not-tvs	built-in	info	An externally-exposed signal net is clamped by a Zener, not a fast ESD TVS.
esd-protection	built-in	info	An externally-exposed signal net (on a connector) has no TVS device.
input-protection	built-in	warning	A connector feeds a power-input pin directly with no fuse or TVS in the path.
power-input-not-driven	built-in	error	A power-input pin sits on a net with no power source (no power-output and no power flag).
power-tap-conflict	built-in	warning	One net is tapped by two different design-wide names (power symbols or global labels).
reverse-blocking-absent	built-in	warning	A connector feeds a power input with no directional element blocking reverse flow.
test-point-coverage	built-in	info	A power rail or ground net has no test point, on a board that uses them.

naming ¶

Rule	Source	Severity	What it checks
diff-pair-naming	built-in	warning	A differential-pair positive net (_P / _DP / trailing +) has no complementary negative net.

board ¶

Rule	Source	Severity	What it checks
annular-width	built-in	error	A via’s annular ring is thinner than the loosest common fabrication floor (0.075mm).
copper-clearance	built-in	error	Copper of two different nets sits closer than the 0.127mm fabrication floor.
hole-size	built-in	error	A via’s drill is smaller than the loosest common mechanical-drill floor (0.2mm).
netclass-track-width	built-in	warning	A net is routed narrower than the track width its own net class declares.
netclass-via-drill	built-in	warning	A net’s via is drilled smaller than the drill its own net class declares.
track-width	built-in	error	A routed track is narrower than the loosest common fabrication floor (0.127mm).

datasheet ¶

Rule	Source	Severity	What it checks
cap-voltage	built-in	error	A capacitor’s datasheet rated voltage does not clear the worst rail it touches times the derate factor.
fet-vdss-below-switched-rail	built-in	error	A MOSFET sits on a rail at or above its datasheet drain-source breakdown voltage.
load-switch-trip-above-fet-rating	built-in	error	A controller-based load switch trips above the continuous drain rating of its external MOSFET.
pin-exceeds-abs-max	built-in	error	A supply pin sits on a rail whose nominal voltage exceeds that pin’s own absolute-maximum rating.
pin-out-of-recommended	built-in	warning	A supply pin sits on a rail whose nominal voltage is outside that pin’s own recommended operating range.
pin-tracking-advisory	built-in	warning	Two pins of one part sit outside a tracking bound their datasheet recommends between them.
pin-tracking-violated	built-in	error	Two pins of one part sit outside the tracking bound their datasheet requires between them.
rail-nominal-out-of-recommended	built-in	warning	A power-input pin sits on a rail whose nominal voltage is outside the part’s recommended operating supply range.
regulator-output-exceeds-abs-max	built-in	error	A regulator’s datasheet output voltage exceeds the absolute-maximum supply rating of a part it feeds.
supply-exceeds-abs-max	built-in	error	A power-input pin sits on a rail whose nominal voltage exceeds the part’s absolute-maximum supply rating.

integrity ¶

Rule	Source	Severity	What it checks
bus-not-modeled	built-in	info	A bus’s member signals are not resolved into distinct nets.
intent/io-map-coverage	intent	warning	How much of the netlist the design intent’s IO map declares at all.
intent/io-map-far-end	intent	warning	A net does not reach the far-end device pin the design intent’s IO map declares.
intent/io-map-net-absent	intent	warning	The design intent’s IO map declares a net the netlist does not have.
intent/io-map-pin-mismatch	intent	warning	A net is not on the pin the design intent’s IO map assigns it to.
intent/load-switch-trip-below-budget	intent	warning	A load switch’s current limit is set below the peak current the design intent declares for the rail it feeds.
intent/module-count	intent	warning	The number of components for a declared module does not match the design intent.
intent/module-missing	intent	warning	A functional block the design intent declares required is absent from the design.
intent/property-ac-coupled	intent	warning	A net the design intent declares AC-coupled is carried by no series capacitor.
intent/property-reset-polarity	intent	warning	A net the design intent declares as a reset is biased to its ASSERTED level, holding the part in reset.
intent/property-strap	intent	warning	A boot/config strap net is biased to the OPPOSITE level from the one the design intent declares it should latch.
intent/protection-discharge	intent	warning	A rail the design intent declares needs a discharge path has no bleeder resistor.
intent/protection-ovp	intent	warning	A rail the design intent declares needs OV protection has no TVS/zener clamp.
intent/rail-current-capacity	intent	warning	The part supplying a rail is rated below the peak current the design intent declares for that rail.
intent/rail-current-margin	intent	warning	A rail’s supply meets its declared peak current budget but not the declared margin factor over it.
intent/sequence	intent	warning	A declared power-up order is not enforced by the design’s power-good/enable chain, or the chain runs the other way round.
intent/strap-address-collision	intent	warning	two devices on one bus strap to the same address
intent/strap-group	intent	warning	a group of strap nets does not encode the value the design intent declares
intent/subsystem	intent	warning	An architectural subsystem the design intent declares is missing a required part or net.
intent/voltage-domain-mismatch	intent	warning	A declared voltage domain’s rail is absent or named for a different nominal voltage.
pin-net-conflict	built-in	info	A pin appears in more than one net’s connections, which is malformed input.
rail-not-classified	built-in	warning	A net named for a voltage feeds a supply pin but is not classified as a rail, so the rail rules cannot see it.
symbol-unresolved	built-in	warning	A symbol reference did not resolve, so its placements carry no pins.
unannotated-components	built-in	warning	Parts still carry a placeholder designator instead of an assigned one.