List broad CATEGORIES or the COMPLETE set within ONE corpus — the shape `search` cannot serve (search returns a ranked, capped sample, not the whole set). Requires `domain`. Returns every category axis with exact counts, and — with an optional `filter` (faceted constraints, e.g. {"spirit":"gin"}) — the COMPLETE record set scoped by it, marked `complete`. A count/aggregate is sound ONLY over a complete set; an incomplete return is flagged, never silently undercounted (the completeness contract). Use for "what kinds are there", "all the X", "how many X"; for one record use `lookup`/`search`. Discover a domain's facets via `describe`. The special domain `directory` enumerates the FLEET itself — the algorithm domains drillable holds (declared registry tags, faceted by class/grain; e.g. "what algorithms are there?"). Mounted corpora: calendar, building-codes, gearing, colorimetry, first-aid, tuning, wire-gauge, preferred-numbers, strength-training, unix-permissions, number-bases, cognitive-psychology, braille, semver, cron, unicode, timezones, metar, glob, ieee754, http-status, uuid, base-encodings, percent-encoding, dms-coordinates, gray-code, hashing, classical-ciphers, hamming-code, geohash, mac-address, poker-hands, capacitor-codes, iso-duration, dice-probability, scrabble-score, mach-number, chords, dtmf, base85, theoretical-ecology, checksums, bloom-filter, search-heuristics, solar-times, blood-alcohol, maidenhead-locator, brewing, celestial-navigation, electrochemistry, structural-mechanics, regex, psychrometrics, photographic-exposure, photometry, rf-link, screen-resolution, color-names, type-sizes, vin, drill-bit-sizing, iso-country-codes, itu-e164, mime-types, finite-automata, ac-circuits, currency-codes, elliptic-curves, queueing-theory, totp-hotp, computational-geometry, crockford-base32, iana-port-numbers, acoustics, magnetism, hydrostatics, gas-laws, blackbody-radiation, antenna-gain, bcp47, dimensionless-numbers, iso-language-codes, dns-record-types, midi-messages, kinematics, digital-logic, clothing-sizes, knitting-needle-gauge, pipe-size, winemaking-math, ansi-escape-codes, radiation-dosimetry, transmission-lines, cribbage-scoring, running-pace, dnd-math, bowling-scoring, tire-size, abn-acn, sedol-cusip, damm-verhoeff, iso-6346, iso-7064, hydrogen-spectrum, material-elasticity, pump-affinity, control-theory, em-plane-waves, ordinary-differential-equations, posix-signals-reference, quaternions-reference, origami-flat-foldability-theorems, trailer-hitch-ball-coupler-classes, bayesian-inference, issn-check, ean-barcode, iana-uri-schemes, aquarium-chemistry, iso-thread, knitting-needle-sizes, bearing-sizes, horology, rocket-propulsion, rolling-element-bearing-life, iec-60320, sae-viscosity, hat-sizes, darts-scoring, complex-numbers, lambda-calculus, combustion-stoichiometry, ham-radio-bands, miniature-scale, fracture-mechanics, torsion, catenary, open-channel-hydraulics, gaussian-beam-optics, nato-phonetic, lei, fen-pgn, nmea-0183, phonetic-algorithms, lumber-grades-dimensions, film-speed-iso, telescope-optics, tabletop-rpg-probability, z-transform, generating-functions, terzaghi-bearing-capacity, icao-doc8643, imei-reference, gs1-ai, ulid, postal-barcodes, photographic-paper-sizes, fishing-line-ratings, sorting-algorithms, candle-making, pool-billiards-geometry, sourdough-ratios, electromagnetic-induction, probability-distributions, isentropic-flow, fatigue-life, ghs-hazard, abrasive-grit-sizes, cycling-power-zones, dynamic-programming-recurrences, smtp-reply-codes, un-locode, chain-pitch, string-gauges, sewing-pattern-grading, aquaculture-stocking-density, polynomial-arithmetic, nhs-number, diode-junction, elastic-collisions, pressure-vessel, reverberation-time, ieee-ethertypes, icao-mrz, http-methods, tls-alerts, bwt-mtf, bicycle-wheel-sizing, silk-thread-nm-denier, soapmaking-lye, iso-3166-2, context-free-grammars, dc-motor-equations, usb-class-codes, film-frame-rates, aperture-f-stop-series, golf-handicap, hydroponics-nutrients, sewing-fabric-math, resin-mixing-ratios, pdf-structure, piping-water-hammer, hertzian-contact-stress, photovoltaic-cell-performance, un-ece-vegetable-fruit-grading-standards, iata-airport-delay-codes, un-transport-hazard-class-un-numbers, faa-nas-airspace-classes, sieve-mesh-sizing, disc-golf-flight-numbers, beekeeping-hive-math, vinyl-record-cutting-specs, houseplant-light-and-watering-calc, cellular-automata-rules, error-correcting-codes-beyond-block, climbing-rope-and-anchor-ratings, knot-invariants, fiber-dispersion, osmotic-pressure-solutions, naics-sic-classification, isni-checksum, shotgun-gauge-and-choke, rope-cordage-strength-and-diameter, screen-mesh-count-and-particle-sizing, battery-cell-form-factor-codes, xor-filter, kite-line-and-wind-window, clothing-glove-size-standards, wasm-module-header, protobuf-wire-format, rankine-cycle-efficiency, aes-fips-block-parameters, voronoi-delaunay, np-completeness-reductions, hidden-markov-viterbi, png-ihdr-fields, mbr-partition-table, fuzzywuzzy-rapidfuzz-string-similarity-api-reference, v-belt-sprocket-sizing, e164-carrier-mnc-mcc, faa-nav-aid-frequency-bands, go-baduk-scoring, zip-central-directory-header, curling-scoring, mahjong-hand-scoring, sudoku-difficulty-rating, dominoes-scoring, base45, pbkdf2, hkdf, hvac-duct-sizing, board-game-elo-scoring, tide-and-moon-phase-almanac, obd2-pids, emission-designators, runway-designators, qr-code, iban-structure, sewing-needle, experiment-design, iana-link-relations, crystallography, png-chunk-type, wind-turbine-aerodynamics, rf-noise-and-link-budget, icd-10-cm, un-sdg-indicator-framework, iso-20022-message-types, world-heritage-list-criteria, german-tax-id-checksum, hydraulic-hose-fitting-sizing, spectacle-frame-and-lens-sizing, beer-lambert-spectrophotometry, induction-motor-slip-torque, corrosion-rate-faraday, seebeck-thermoelectric-generation, viscosity-shear-rheology, imo-ship-number, itu-callsign-allocation, alcohol-proof-abv, code128-code39-barcode-checksum, usp-suture-sizing, precious-metal-fineness, hop-alpha-acid-ibu, guitar-fret-spacing, juggling-siteswap, knots, leathercraft-stitch-and-skiving, data-structure-complexity, ipv4-tcp-header-bitfields, cologne-phonetic-and-match-rating, needleman-wunsch-smith-waterman-alignment, un-vienna-road-signs, billiards-collision-physics, naismith-trail, statistical-mechanics, population-genetics, electrical-transformer-turns-ratio, unicode-script-property-values, sd-card-speed-class, rebar-sizing-astm-a615, pool-spa-water-chemistry, home-canning-process-times, seismic-magnitude, battery-peukert-discharge, ac-skin-effect-transformer-losses, cpf-cnpj-nif-national-id-checksums, grib2-wmo-bitstream-header, aamva-drivers-license-barcode-pdf417, ntp-timestamp-format-and-leap-indicator, o-ring-sizes, npt-pipe-thread, saami-ammunition-caliber, linear-programming-simplex, clausius-clapeyron-vapor-pressure, fips-state-county-codes, usda-plants-taxonomic-registry, orifice-venturi-flow-meter, beer-style-specs, doppler-effect, compton-scattering, ipa-phonetic-alphabet, library-of-congress-classification-outline, nail-size-penny-system, book-format-folio-quarto-octavo, wine-bottle-nomenclature-volumes, garden-hose-thread-ght, wheel-bolt-pattern-pcd, stable-matching-gale-shapley, bezier-de-casteljau-splines, hall-effect, gyroscopic-precession, photoelectric-effect, combinatorial-game-theory-nim-sprague-grundy, un-m49-region-codes, hvac-filter-merv-rating, paper-basis-weight-system, flag-semaphore-encoding, uv-index-calc, watch-movement-ligne-sizing, model-rocket-motor-classification, cornhole-scoring, skin-cancer-epidemiology, chaos-theory-fractal-dimension, thermal-expansion-coefficients, agma-gear-tooth-bending-stress, bolt-preload-torque-tension, magnetic-circuit-reluctance, ashrae-refrigerant-designations, upu-s10-tracking-number, rubiks-cube-notation-and-metrics, food-additive-e-numbers, multihash-cid, axe-throwing-scoring, voting-tally-methods, canine-caloric-requirements, maritime-mid-ship-station, fire-hose-thread-sizing, ski-binding-din-release-setting, zipper-tooth-gauge-sizing, racket-stringing-tension-and-pattern, arrhenius-equation, larmor-radiated-power, npsh-cavitation-margin, centrifugal-fan-laws, magnus-effect, pop-rivet-sizing, michaelis-menten-enzyme-kinetics, larmor-precession, itu-r-recommendation-v431-frequency-band-nomenclature, voltage-drop-conductor-sizing, grounding-electrode-resistance, chimney-stack-effect-draft, concrete-water-cement-ratio-strength, helmholtz-resonator-port-tuning, propeller-pitch-slip-thrust, pencil-lead-diameter-and-hardness-scale, hydraulic-jump-open-channel-flow, epa-air-quality-index-breakpoints, concrete-maturity-method, wet-bulb-globe-temperature-wbgt, capstan-belt-friction-equation, iala-maritime-buoyage, iau-constellation-codes, egg-size-grading, respirator-filter-class-rating, resin-identification-codes, nfpa-fire-extinguisher-classification, iucn-red-list-categories, enhanced-fujita-scale, proquint-encoding, electrical-conduit-trade-size, fishing-hook-size, baume-specific-gravity-converter, kalman-filter-and-state-estimation, coriolis-effect-deflection, coulombs-law-electrostatic-force, stokes-law-terminal-velocity, helical-compression-spring-rate, clothing-pattern-drop-and-suit-size-system, bowling-ball-drilling-layout, tippet-x-diameter-calculator, curie-weiss-magnetic-susceptibility, penman-monteith-reference-evapotranspiration, camera-lens-filter-thread-and-step-ring-sizing, amateur-radio-contest-scoring, optimal-stopping-theory, cherenkov-radiation-angle, zeeman-effect-splitting, josephson-junction-relation, thermal-expansion, malus-law-polarization, hazen-williams-pipe-flow, extended-surface-fin-heat-transfer, fillet-weld-strength, isan-check-character, iswc-check-digit, rifle-scope-moa-mrad-conversion, cvss-scoring, dicom-tag-dictionary, fips-140-security-levels, rutherford-scattering-cross-section, ais-navigation-status-message-types, nema-wiring-device-configurations, rfc5322-email-address-grammar, tor-v3-onion-address, railway-signal-aspects-and-block-rules, uic-wagon-number-check-digit, asl-fingerspelling-manual-alphabet, retrieval-metrics, vehicle-stopping-distance, vcard-property-registry, iana-root-zone-tld-registry, nato-stanag-military-rank-codes, bip39-mnemonic-checksum, nema-mg1-motor-frame-sizes, larson-miller-creep-rupture-parameter, icao-wake-turbulence-separation-calculator, contract-bridge-hand-evaluation, simple-machines-mechanical-advantage, led-photodiode-responsivity-and-quantum-efficiency, icao-notam-q-code-contractions, sysexits-posix-exit-codes, marc21-code-lists, fix-protocol-tag-dictionary, mutcd-traffic-sign-codes, isbn-registration-group-ranges, nordic-personal-id-checksum, table-tennis-scoring, flywheel-kinetic-energy-storage, iec-60529-ip-code-structure, radiation-pressure, gravitational-lensing-deflection, wmo-cloud-atlas, wind-speed-averaging-conversion, FCC-NWS-SAME-event-codes-EAS, transponder-squawk-codes, icd-10-pcs-code-decoder, nema-250-enclosure-type-ratings, richardson-dushman-thermionic-emission, posix-errno-codes, win32-hresult-facility-codes, basel-conv-hazard-codes, sql-sqlstate-codes, badminton-scoring, icao-wake-turbulence-category-assignment, dewey-decimal-classification, mohs-hardness-scale, glasgow-coma-scale, torino-impact-hazard-scale, bortle-dark-sky-scale, textile-care-symbols-iso3758, un-dangerous-goods-placard-design-orange-book, backgammon-pip-count-and-cube, union-find-disjoint-set, quadratic-residues-jacobi-symbol, cigar-ring-gauge, surfboard-volume-calculator, seawater-sound-speed-equations, french-gauge-medical-tubing, duplicate-bridge-matchpoint-scoring, blackjack-basic-strategy-ev, rack-units, eip-55-checksum-address, iccid-sim-card-checksum, iso-15924-scripts, welding-rod-electrode-classification-aws, pinewood-derby-physics, golay-code-23-12, vexillology-flag-construction-proportions, pagerank-power-iteration, raft-consensus-safety-properties, rohs-weee-marking-symbols, ssh-key-fingerprint, woodturning-lathe-speed, table-of-consanguinity-relationship-calculator, apgar-score, mil-std-810-environmental-test-methods, turntable-tonearm-alignment-geometry, roller-derby-jam-scoring, gemstone-carat-weight-from-dimensions, coin-melt-value, computability-turing-machines, public-key-crypto-arithmetic, real-time-scheduling-theory, order-theory-lattices, ipv6-header-bitfields, baking-pan-volume-substitution, bicycle-spoke-length-calculation, freediving-depth-pressure-tables, croquet-and-bocce-scoring-and-legality, skip-list-probabilistic-height, merkle-tree-proof-verification, pickleball-scoring-and-rules, sound-transmission-mass-law, home-roasting-coffee-first-crack-development, elf-header-fields, pcap-global-header-fields, dns-header-bitfields, falconry-jess-and-weight-management, pottery-throwing-and-clay-shrinkage, wine-appellation-classification-systems, un-spsc-product-classification, rubber-plastic-shore-durometer-hardness, tea-brewing-parameters, rowing-ergometer-pace-power, fabric-gsm-areal-density-conversion, kombucha-fermentation-math, fdi-dental-tooth-numbering, precious-metal-hallmark-purity-marks, eu-vat-number-checksum, z-base-32-codec, solar-panel-tilt-poa-irradiance, specific-heat-sensible-latent-load, rxnorm-normalized-drug-names, lockpicking-pin-tumbler-tolerance, loinc-observation-codes, fpv-drone-motor-prop-math, aci-318-reinforced-concrete-flexural-capacity, consensus-quorum-arithmetic, tcg-deck-draw-probability, iso6709, usps-pub28-abbreviations, adts-aac-frame-header, fermi-dirac-statistics, pickleball-equipment-specs, butterworth-chebyshev-filter-design, hash-table-load-factor-and-collision-math, munsell-color-notation, geologic-time-scale-ics, douglas-sea-scale, palermo-impact-hazard-scale, eyring-transition-state-theory, debye-huckel-activity-coefficient, sausage-casing-diameter-standards, economic-inequality-indices, tournament-tiebreak-systems, acupuncture, cocktail, camera, law, copyright, trademark, music-theory, supplements, writing-style, minecraft-dungeons, spanish, medical-denials, languages, behavioral-econ, baseball, agent-practices, pokemon, mcp, readability, citations, relay, models, self-oracle, recall-traps, units, tax, physics, logic, astronomy, biology, geography, medicine, chemistry, math, eurorack, cooking, personal-finance, stardew, coffee, electronics, physiology, diving, decibels, subnetting, textile-gauge, statistics, chess-endgames, woodworking, rating-systems, check-digits, paper-sizes, swe-claim-denial, psychology, roman-numerals, minecraft-mods, encodings, hardiness-zones, terraria, aspect-ratio, resistor-color-code, incoterms, soundex, zigbee, wind-chill, saffir-simpson, dataviz, patents, shoe-size, crc, base58, bech32, reed-solomon, string-similarity, compression, prng, computus, hyperloglog, peppers, tomatoes, fluid-mechanics, information-theory, combinatorics, graph-algorithms, linear-algebra, algorithm-complexity, coding-theory, fourier-analysis, numerical-methods, heat-transfer, markov-chains, orbital-mechanics, html-named-character-references, thermodynamics, geometric-optics, convex-optimization, nuclear-decay, fresnel-equations, myrcene, itu-q-code, 3d-printing, arrow-spine, camera-film-formats, mechanical-vibrations, fiber-optics, beaufort-scale, iana-protocol-numbers, boolean-algebra, game-theory, bolts-screws, standard-atmosphere, capillary-action, tcr-therapy, software-licenses, gauge-systems-industrial, ring-sizes, three-phase-power, http-headers, group-theory, molecular-diffusion, tabletop-wargaming-probability, matrix-decompositions, count-min-sketch, punycode, photovoltaic-cell-model, faa-n-number, orcid-checksum, swift-bic-format, projectile-ballistics-drag-corrected, faa-airport-codes, iso15459-license-plate, typography, tides, ndc, epsg, hts, elevator-rope-crane-wire-rope-classification, ecfr, regular-expression-derivatives, scientific-method, mtg-rules, cas-registry-checksum, international-code-of-signals, garden-perennials, usb-device-descriptor, compost, flag-semaphore, shipping-container-iso-6346-sizing, beer-styles, ceramics-glaze-chemistry, compost-cn-ratio, archimedes-buoyancy-and-flotation, iso-7010-safety-signs, sun-safety, market-identifier-codes, horseshoe-pitching-scoring, voting-theory-social-choice, merchant-category-codes, isrc, iso-3166-3, isil, cfi, perfume-concentration-and-dilution, cheesemaking-recipe-math, wcag-success-criteria, iec-60529-ip-rating-codes, pencil-graphite-hardness-grading, iarc-carcinogen-classification-registry, hornbostel-sachs-instrument-classification, ethernet-cable-category-ratings, chemical-compound-physical-properties, tippet-x-rating, weir-flow-discharge, who-atc-drug-classification, schwarzschild-radius, iata-icao-airline-designators, hl7v2-message-type-registry, nfpa-704-fire-diamond, dea-controlled-substance-schedules, icao-wake-turbulence-category, usda-beef-quality-grades, koppen-climate-classification, modified-mercalli-intensity, ansi-a13-1-pipe-marking, volcanic-explosivity-index, digit-lottery, rayleigh-scattering-intensity, grounded-retrieval, asme-y14-5-gdt-symbols, automotive-blade-fuse-sizing, figure-skating-scoring, ioc-noc-codes, icd-10-pcs, aiga-dot-symbol-signs, universal-dependencies-relations, lsh-minhash, string-matching-algorithms, gymnastics-code-of-points, archery-target-scoring, wind-load-structures, seawater-sound-speed, messier-catalog, grpc-status-codes, cwe-weakness-taxonomy, cites-appendices, climbing-grade-conversion-scales, fire-sprinkler-k-factor-sizing, colregs-navigation-rules, osha-permissible-exposure-limits, ada-2010-accessible-design-standards, cdc-acip-immunization-schedule, un-human-rights-instruments, ipcc-climate-findings, rfc2119-bcp14-requirement-keywords, montreal-protocol-controlled-substance-annexes, hl7-fhir-r4-resource-type-registry, roller-chain-sizing, sec-edgar-filing-rules, systemd, esrb-pegi-content-rating-systems, consumer-product-recalls-policy, antitrust-merger-guidelines, epidemiology-surveillance, usda-egg-poultry-inspection-grade-marks, un-dangerous-goods-packing-instructions, scientometrics, kayak-canoe-hull-speed, radar-range-equation, food-recalls, supreme-court-holdings, wmo-present-weather-code, who-pheic-declarations, us-place-gazetteer, fmcsa-hours-of-service-limits, gdpr-administrative-fine-tiers, fmla-employee-eligibility-thresholds, uspstf-screening-grades, ada-diabetes-diagnostic-criteria, flsa-overtime-exemption-thresholds, cpsc-childrens-product-lead-limits, fda-major-food-allergen-labeling, fatf-aml-cft-recommendations, ramsar-wetland-designation-criteria, who-preeclampsia-diagnostic-criteria, bluetooth-company-identifiers, spirits-standards-of-identity, eeoc-charge-filing-deadlines, faa-part107-small-uas-operating-limits, salometer-brine-salinity, fda-food-code, national-register-historic-places-criteria, codex-alimentarius-food-standards, fda-orange-book-therapeutic-equivalence, nist-cybersecurity-framework, geneva-conventions-ihl-articles.