feat: map knockout props in SilkscreenText component

[bimakw]

Summary

Add support for knockout silkscreen text by mapping component props to circuit-json fields.

• Map isKnockout prop to is_knockout in pcb_silkscreen_text
• Map knockoutPaddingLeft/Right/Top/Bottom props to knockout_padding object
• Add test verifying knockout props are correctly set in circuit-json

Changes

lib/components/primitive-components/SilkscreenText.ts:

• Build knockout_padding object from individual padding props
• Pass is_knockout and knockout_padding to db.pcb_silkscreen_text.insert()

Test Plan

• silkscreen-text-knockout.test.tsx verifies is_knockout: true in database
• All existing silkscreen tests pass (9 tests)
• TypeScript type check passes

Related

/claim #770

Part of tscircuit/tscircuit#770 (Pinout Diagram Improvements)
Companion PR: tscircuit/circuit-to-svg#495

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Project	Deployment	Actions	Updated (UTC)
tscircuit-core-benchmarks	Ready	Preview, Comment	Feb 7, 2026 9:48am

[github-actions]

This PR has been automatically marked as stale because it has had no recent activity. It will be closed if no further activity occurs.

[bimakw]

Still active. All CI passing, no conflicts. This maps the knockout props (is_knockout + knockout_padding) to pcb_silkscreen_text in circuit-json. Companion PR will be resubmitted on circuit-to-svg.

@seveibar would appreciate a review when you get a chance.

[seveibar]

knockout text does not appear as knockout text

[bimakw]

Companion PR resubmitted: tscircuit/circuit-to-svg#506 (rebased on latest main, #495 was stale-closed).

[seveibar]

Sorry @bimakw, i see that you have a companion PR, that needs to be merged first

[bimakw]

Got it! Yeah the knockout rendering lives in circuit-to-svg#506 — once that's merged and published, the core snapshot will show the actual knockout effect. Could you review #506 first?

[bimakw]

Updated — circuit-to-svg bumped to 0.0.327 (includes the merged #506) and regenerated the knockout snapshot. The silkscreen text now renders with the actual SVG mask knockout effect. Rebased on latest main too, all CI should be green.

[bimakw]

CI has 2 snapshot mismatches (repro32, repro54) — these are from circuit-to-svg 0.0.326's schematic text positioning change (#497). Snapshots render identically on macOS but slightly different on Ubuntu/CI due to font metrics. All other tests pass (780 total). Could you re-run CI with snapshot updates, or I can try regenerating in a Linux container if needed.

[bimakw]

All CI green now — regenerated the 2 schematic snapshots on Ubuntu/bun-1.3.5 via Docker to match CI font rendering. Ready for review.

[bimakw]

Hey, rebased on latest main (v0.0.1017) and addressed the review:

• circuit-to-svg bumped to 0.0.327 which includes the knockout silkscreen rendering from circuit-to-svg#506 (merged)
• Snapshot now shows actual knockout effect with SVG mask
• Also fixed handling of the uniform knockoutPadding prop (was only handling individual Left/Right/Top/Bottom, now uniform padding works as fallback)
• Added test for uniform knockout padding
• All 125 primitive component tests pass

Ready for re-review.