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See Space for the decided part of this page.

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Known issues

Divergences are where code and design intent disagree; open decisions are where nothing has been decided yet. Neither is resolvable by inference.

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Gaps in the current rules

  • The specification stops at spacing-9; code ships spacing-0 through spacing-10. The specification also records no definition for any spacing step, so which gap each step is for is undecided — see TITAN-GAP-02 and TITAN-DIV-09.
  • spacing-0 (0rem) and spacing-none (0px) are duplicates. Both ship, neither is marked deprecated. This page recommends spacing-none on the grounds that it reads as a decision, but that is an inference, not a documented policy. See TITAN-DIV-06.
  • --titan-spacing-compact-3 (0.375rem) exists as a public CSS custom property but is not a token on any access surface. Treat it as private; it is not documented as such.
  • A second, older 8px spacing unit is still exposed alongside the scale. Its relationship to the spacing-* steps is unstated, and its multiplier behavior does not correspond to any step on this page.

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Constraints Titan should enforce

These are real, currently-true rules. Nothing in code stops a builder from violating them today — each is a placeholder for a guardrail Titan hasn’t built, not a decision still being made.
Last modified on September 2, 2026