Scope: Yoga & Pilates Equipment (yoga-equipment) — non-mat yoga props (blocks, straps, bolsters, wheels, blankets), Pilates studio/spring apparatus (reformer, Cadillac/trapeze table, Wunda chair, spine corrector/ladder barrel), and small Pilates/mat resistance tools (fitness/magic circle, resistance band or loop, stability ball). Exercise/yoga mats are the sibling leaf `yoga-mats` (catalog.json) and are out of scope.

Seed:
1. The treadwear-grade equivalent here is resistance-band/spring color coding: it looks like a comparable spec but each brand assigns its own color-to-tension mapping, so "yellow" only means something within one brand's lineup, not across brands — the real comparable number is the stated lbs/kg.
2. A tailor notices the closure hardware first: a strap's D-ring vs. cinch buckle (how precisely and durably it holds tension) and a bolster's cover (zippered/removable vs. sewn shut) — i.e. what can be adjusted or re-fitted later vs. what is fixed at purchase, the same thing a tailor checks on a garment.

Sources:
[wikipedia_pilates] https://en.wikipedia.org/wiki/Pilates — apparatus list: Reformer, Cadillac, Wunda Chair, Spine Corrector, Ladder Barrel, Pilates ball — fetched excerpt
[wikipedia_exercise_ball] https://en.wikipedia.org/wiki/Exercise_ball — "typically in 5 diameters of 10 cm increments, from 35 to 95 cm" — fetched excerpt
[wikipedia_resistance_band] https://en.wikipedia.org/wiki/Resistance_band — "bands are color-coded to show different levels of resistance... code colors vary between brands" — fetched excerpt
[manduka_cork_block] https://www.manduka.com/products/cork-yoga-block — 9x6x4in/23x15x10cm block, ~1kg/2.2lb, dense/grounded, slip-resistant cork — fetched excerpt
[manduka_foam_block] https://www.manduka.com/products/recycled-foam-yoga-block — same 9x6x4in sizing, ~0.45kg/1lb, closed-cell recycled foam — fetched excerpt
[manduka_align_strap] https://www.manduka.com/products/align-yoga-strap — cotton strap, 6/8/10 ft lengths, zinc-alloy cinch buckle with interlock — fetched excerpt
[manduka_equa_bolster] https://www.manduka.com/products/equa-rectangular-bolster — rectangular bolster, ~71x30x13cm, 30% recycled fiber fill, 2.2lb, microfiber cover — fetched excerpt
[merrithew_fitness_circles] https://www.merrithew.com/shop/fitness-accessories/fitness-circles — fiberglass=light resistance, impact-plastic=medium, steel=firm resistance; 12in/14in diameters — fetched excerpt
[merrithew_reformers_professional] https://www.merrithew.com/shop/pilates-reformers/professional — nickel metal springs, 3 gearbar positions, EVA foam carriage padding, 22in (56cm) std / 24in (61cm) wide carriage, 13-position rope/pulley height adjustment — fetched excerpt
[theraband_latex_bands] https://www.theraband.com/products/latex-resistance-bands — "Trusted Progression System" from Super Light (2.4 lbs) to Elite (14.2 lbs) — fetched excerpt

Branches:
- product_type → yoga_props / pilates_studio_equipment / pilates_small_equipment: the defining spec set (prop material, spring/carriage specs, or resistance-tool material) is disjoint between the three; "Each apparatus was designed to..." (wikipedia_pilates) backs treating studio apparatus as its own set.
- intended_setting=studio_or_gym → ask carriage_width, resistance_source: merrithew_reformers_professional ties the 24in wide-carriage option and spring system specifically to studio/professional models.

Noise (brand-sheet rows left out):
- Reformer overall frame length/footprint: not consistently stated on fetched pages; dropped rather than guessed.
- Exercise-ball anti-burst/weight-capacity rating: no fetched source stated a number; not included.
- No third-party safety certification standard (comparable to a helmet or car-seat standard) governs yoga/Pilates props or reformers in any fetched source — manufacturer-stated specs only, noted rather than invented.
- Price/brand/rating: excluded per rule.
- Toe separators, aerial yoga hammocks, ankle/wrist weights: left out of the three-type split as minor/adjacent items rather than forcing a fourth thin facet set.

Corrections (2026-10-26):
- Fixed `ball_diameter`: definition/values were 45-85cm but contradicted their own cited `wikipedia_exercise_ball` quote ("10 cm increments, from 35 to 95 cm"); widened to 35/45/55/65/75/85/95cm to match the citation, and updated the matching judgement line from "45-85 cm" to "35-95 cm".
- Gated `intended_setting`'s `studio_or_gym` branch to apparatus purchases: added `carriage_width` and `resistance_source` to `product_type`'s `makes_irrelevant` for the `yoga_props` and `pilates_small_equipment` branches, so a studio-bound block/strap/band/ring buyer is no longer asked about carriage width or spring-vs-cord resistance.
- Added `footbar_height_adjustment` and `headrest_adjustment` facets (reformer spec rows confirmed on `merrithew_reformers_professional`: "Four height positions, plus one that moves the Footbar completely out of the way"; "adjustable headrest offers three different positions"), same tier as the existing `rope_height_adjustment`; added a "Headrest" vocabulary entry and repointed "Footbar" to the new facet.
- Added `block_edge_and_grip` facet (beveled/textured vs. squared/smooth), sourced to the two already-cited block pages, which both call this out: `manduka_cork_block` ("Naturally textured cork surface offers reliable traction"; "Beveled, rounded edges reduce pressure") and `manduka_foam_block` ("Rounded edges provide comfortable contact"; "Slip-resistant Grip"); added a "Beveled edge" vocabulary entry.
- Kept `intended_setting`'s question text as-is rather than rewording: it has to generalize across all three product_type branches (props/apparatus/small tools), each of which has its own home-vs-studio distinction, so anchoring the wording to one subtype (e.g. "reformer") would misfit the other two; its specificity comes from the downstream facets it unlocks, as the blind check itself noted.
- Relabeled `resistance_source`, `carriage_width`, `carriage_padding`, `rope_height_adjustment` (and the two new reformer facets above) from `listing` to `researched`: each is backed by a single brand's own spec page, not confirmed as appearing on most third-party retail listings.
- Fixed the "Gearbar" vocabulary entry, which defined the term using "spring box," itself undefined anywhere in the vocabulary; reworded to avoid the undefined term.
- Added the missing `widest_26in_66cm` value to `carriage_width` (the NX3 MAX's 26 in / 66 cm carriage, confirmed on the same cited Merrithew page alongside the 22in/24in models).
- Not actioned: footbar height/headrest were the only two reformer spec-row omissions put in the checker's Required Fixes list; shoulder rests and standing-platform material (also raised in the checker's Part F coverage notes but not in Required Fixes) were left out, consistent with the existing "Noise" line on dropping brand-sheet rows not confirmed as a buyer-facing distinguishing spec.