Scope: Hand and machine tools used to sew, knit, crochet, and embroider by hand or on a domestic machine — needles (hand and machine), pins, knitting needles, crochet hooks, embroidery hoops, thimbles, and marking/measuring notions. Excludes fabric (fabrics leaf), yarn/thread fiber itself (yarn leaf), buttons/snaps/zippers (fasteners leaf), scissors/rotary cutters/pinking shears (cutting-tools leaf), glue/adhesives (glue leaf), and the sewing machine itself (durable equipment, no leaf covers it; out of scope for a "tools" leaf).

Seed: Ran scripts/seed.py mentally against catalog siblings (crafts group: beads, brush-stamp-tools, clay, craft-kits, cutting-tools, easels, fabrics, fasteners, glue, magnet-fasteners, paint, tapes, yarn). Confirmed sewing-tools is the only leaf for needles/pins/hooks/hoops/thimbles/notions; scissors and sewing machines are deliberately excluded per sibling boundaries.

Sources:
[wikipedia_sewing_needle] https://en.wikipedia.org/wiki/Sewing_needle — hand needle classes (sharps, betweens, milliners, tapestry, chenille, leather, calyx/self-threading, etc.), size convention (lower number = thicker/longer), materials (steel, nickel/18k gold plate, platinum-titanium for embroidery) — fetched, confirmed
[wikipedia_sewing_machine_needle] https://en.wikipedia.org/wiki/Sewing_machine_needle — 130/705H system, Nm/American size table (60/8–130/21), universal/ballpoint/jeans/leather/wing/microtex types, flat vs round/threaded/notched shank — fetched, confirmed
[wikipedia_knitting_needle] https://en.wikipedia.org/wiki/Knitting_needle — straight/DPN/circular/interchangeable forms, materials, CYCA standard size table (mm + US number, lace to jumbo) — fetched, confirmed
[wikipedia_crochet_hook] https://en.wikipedia.org/wiki/Crochet_hook — diameter range 0.35mm–25mm, steel <2mm / aluminum 2–6mm / bamboo-wood-plastic above, CYCA table — fetched, confirmed
[wikipedia_thimble] https://en.wikipedia.org/wiki/Thimble — materials (metal/brass, leather, rubber, wood, glass/china), dome shape history, sewing-tools navbox (bobbin, pincushion, seam ripper, sewing gauge, tape measure, tracing paper/wheel) — fetched, confirmed
[wikipedia_embroidery_hoop] https://en.wikipedia.org/wiki/Embroidery_hoops_and_frames — wood/plastic rings, spring-tension band variant, thin plastic for machine embroidery — fetched, confirmed
[schmetz_needle_guide_2026] SCHMETZ 2026 ABC Pocket Guide PDF (cdn.shopify.com/.../SCHMETZ-2026-ABC-Pocket-Guide.pdf) — 130/705H system, universal sizes 60/8–120/19, color coding, flat vs round/threaded/notched shank, needle types list — fetched, confirmed
[janome_needle_guide] Janome "Sewing Basics – Know Your Needles" PDF via web.archive.org — ballpoint/universal/sharp/leather point definitions, size-to-fabric-weight logic — fetched, confirmed
[dritz_prym_pins] dritz.com/collections/quilting-pins-needles-tacks — glass head, flower head, flat printed head, dipped/appliqué head, curved safety/basting pins, real lengths (3/4"–2") — fetched, confirmed
[dritz_prym_marking] dritz.com/collections/marking-tracing — disappearing-ink/air-erasable pen, water-soluble pen/pencil, iron-on transfer pencil, self-erasing pen — fetched, confirmed
[dritz_prym_measuring] dritz.com/collections/measuring — clear/gridded rulers, measuring tool sets — fetched, confirmed
[dritz_prym_hoops] dritz.com/collections/hoops-frames — beechwood frame, hoop sizes 13/16/19/22/25cm and 8"/12" — fetched, confirmed
[clover_pins_needles] clover-usa.com/collections/pins-and-needles — silk/patchwork/quilting/applique pins, marbled glass head pins, Takumi single/double-point/circular/interchangeable knitting needles, Gold Eye needle sizes (Chenille No.18–24, Embroidery No.3–9, Quilting Between No.9–10) — fetched, confirmed
[clover_thimbles] clover-usa.com/collections/thimbles — protect-and-grip (closed dome), flexible rubber, leather, coin, open-sided/adjustable-ring thimble styles — fetched, confirmed

Branches: tool_type routes hand_sewing_needle → hand_needle_type/size/eye (sentence: hand vs machine needle classes are completely different systems per wikipedia_sewing_needle vs wikipedia_sewing_machine_needle); sewing_machine_needle → machine_needle_system/size_nm/shank_type (same split); pin/knitting_needle/crochet_hook/embroidery_hoop/thimble/marking_tool/measuring_tool each route to their own 1–2 facets and make the needle-family facets irrelevant, since none of their specs (hook mm, hoop diameter, thimble style) overlap with needle point/eye/shank facets.

Noise (spec-sheet rows seen but not made facets): dress form, tailor's ham (pressing/fitting aids, not a needle/pin tool), pattern notcher (pattern-drafting tool, low frequency), pinking shears/scissors (cutting-tools leaf), bobbins and needle threaders (real notions but no distinguishing spec beyond title keyword — folded into general "small notions" rather than given a dedicated facet set given lean budget), buttons/snaps/hook-and-eye (fasteners leaf), price/brand/rating (never facets per rule).

Corrections: none (first run; no stale partials present in sewing-tools/ or scratch/sewing-tools/ at start).

Corrections (2026-10-26):
- hoop_diameter values/definition/judgement/reference fixed to the real fetched Dritz/Prym numbers (13/16/19/22/25cm, not 10/15/20/25/30cm); confirmed by re-curling the live dritz.com→handicraft.com→prymamericas.com redirect chain; reference URL updated to the final prymamericas.com page; dropped wikipedia_embroidery_hoop from hoop_diameter's evidence since its fetched text has no size numbers.
- machine_needle_shank_type.source changed listing -> researched (its own listing_field_hint already said "rarely stated directly").
- Added twin_or_triple to machine_needle_system.values and a new ordinal facet machine_needle_twin_triple_spacing (1.6mm-8.0mm bins), sourced to the SCHMETZ 2026 guide's Twin & Triple page (fetched, pdftotext'd, grepped: confirms 1.6/2.0/2.5/3.0/4.0/6.0/8.0mm spacings); flagged single-sourced via a new judgement since Wikipedia confirms twin/triple needles exist but gives no spacing numbers and no second brand's chart was reachable this run.
- Added vocabulary entries for "Bodkin", "Tatting needle", "Doll needle" (hand_needle_type), definitions taken verbatim-in-substance from the already-cited wikipedia_sewing_needle page (re-fetched and grepped to confirm).
- Reworded tool_type's question/cold_start_question to "Hand-sewing or sewing-machine needle, pin, knitting needle, crochet hook, hoop, or thimble?" so hand vs machine needle are distinct options (fits the 12-word cap).
- Reworded fabric_or_yarn_weight's question/cold_start_question to "Fine, light-to-medium, medium-to-heavy, or heavy/bulky fabric or yarn?" so each option maps 1:1 to a facet value, dropping the ambiguous bare "medium".
- Rejected: crochet hook head-shape facet (inline vs. tapered). Re-fetched clover-usa.com's current crochet-hook collection pages (amour, soft-touch, bamboo, amour-steel, takumi-tunisian via a fresh sitemap lookup, since the originally cited /collections/crochet-hooks now 404s) and grepped for "inline"/"tapered": every "inline" hit is a CSS/JS class name (inline-block, inline-row, inline-item), and "tapered" appears nowhere. Could not reach a wayback snapshot of the old URL to check if this content existed before a site redesign. Not adding a facet on an unverifiable premise.