ML Input → Output — H-Bracket Concepts

Capital H fused with bracket logic • 6 variants • 100 / 32 / 16px • both polarities

The fusion: a square bracket is a vertical stem with inward arms top and bottom — so two facing brackets are already an H without its crossbar. Each mark uses the bracket arms as the H’s slab feet and the crossbar as the input→output “bridge.” One symbol, read as both [ ] and H.

Weight is deliberately bolder than the original 6px brackets: an H with a crossbar needs more mass to hold at 16px than two bare verticals do.

Reference brackets-v1-chevron (prior winner)
100
32
16
100
32
16
V1 — Structuralh-bracket-v1-structural.svg
B / W — W / B
100
32
16
100
32
16
RationaleThe clearest fusion: bracket arms become the H’s slab feet, solid crossbar is the output bridge. The baseline everything else is measured against.
16px legibilityStrong. Reads as a confident H-with-serifs; feet and bar hold.
RiskMost “letter-like” of the set — closest to a plain monogram, least overt about transformation.
RecommendationKeep as the legibility control and the safe primary.
V2 — Chevronh-bracket-v2-chevron.svg
B / W — W / B
100
32
16
100
32
16
RationaleCrossbar’s left end is notched into a chevron so the bridge reads left→right. Directionality is carved into the structure, not bolted on as an arrow.
16px legibilityGood. The notch softens but the H stays intact; reads slightly lighter than V1.
RiskAt very small size the notch can disappear, collapsing to V1. The cut adds a faint right-pull to balance.
RecommendationStrongest “story” mark for app/large use; pair with V5 for favicon.
V3 — State Changeh-bracket-v3-statechange.svg
B / W — W / B
100
32
16
100
32
16
RationaleFragmented left stem (raw input) resolves into a solid right stem (structured output); the solid crossbar is the moment of structuring. Most literal narrative.
16px legibilityAcceptable. Gaps close at small size and it reads as a solid H — narrative is a 100/32px asset.
RiskMost decorative/busiest; the broken stem can read as damage rather than intent if scaled carelessly.
RecommendationUse as a large-format / animated “build” mark, not the system primary.
V4 — Negative Spaceh-bracket-v4-negative-space.svg
B / W — W / B
100
32
16
100
32
16
RationaleBold solid H with the chevron carved out of the bar as an even-odd void — transformation implied by absence. Most premium and ownable; the directional cut is the only detail.
16px legibilityStrong silhouette; the void shrinks but the bold H is unmistakable.
RiskBelow ~20px the chevron void fills in and the “flow” meaning is lost (reverts to a plain bold H).
RecommendationTop contender for the master mark alongside V6 — the most logo-like.
V5 — Faviconh-bracket-v5-favicon.svg
B / W — W / B
100
32
16
100
32
16
RationaleHeaviest weight, no fragile detail. Slab feet + bold bar fuse into one solid H-with-serifs that survives the smallest sizes. The system’s favicon/app-icon master.
16px legibilityBest of the set — reads instantly at 16px in both polarities.
RiskCarries no directional cue; relies on the family for the input→output meaning.
RecommendationAdopt as the dedicated small-size mark, paired with V2/V4/V6 at large size.
V6 — Lockup Symbolh-bracket-v6-lockup-symbol.svg
B / W — W / B
100
32
16
100
32
16
RationaleRefined, tighter box with a single subtle chamfer on the bar — calm enough to sit beside a wordmark while still carrying directionality. The master mark for lockups.
16px legibilityStrong; slightly lighter than V5 by design, still clean at 16px.
RiskThe chamfer is subtle — at favicon size it reads as V1 (which is fine; defer small sizes to V5).
RecommendationPrimary lockup symbol; hand this one to Illustrator first.