v1 shipped click-based state cycles. v2 adds URL-seeded initial state so
the runner can reach any state the component exposes without walking a
click sequence, and runs every instrumented demo TWICE in CI (LTR + RTL)
to catch direction-specific regressions like the slider thumb transform
that landed this week.
## New test-route infrastructure
- `src/routes/test/soma/_perms.svelte.ts` — parses `?perm.X=Y` query
params into a typed `Perms` record (naive coercion: `'true'` → boolean,
digits → number, else string). Exposed via `Perms.getOr({})` context.
Underscore prefix so SvelteKit does not route it.
- `+layout.svelte` — parses perms once at mount, sets context, honours
`?perm.dir=rtl` and `?perm.locale=en` by routing through
`App.setDir` / `App.setLocale` so the existing control strip stays in
sync.
## Demo opt-in
Three demos seed initial state from URL params (v1 + v2 combined):
- `dialog` — `?perm.open=true` lands open.
- `tabs` — `?perm.value=tab-2` lands on that tab.
- `toolbar` — `?perm.format=bold,italic` + `?perm.align=center` preselect
toggles.
## Runner extension
`scripts/permutation-check.ts` now runs each instrumented demo under a
matrix of URL variants (currently `ltr` + `rtl`), validates morfo at the
URL-seeded state BEFORE any clicks (logged as `[initial seed]`), then
runs the v1 click cycle. Output format updated to show per-variant
blocks.
Result: 3 instrumented demos × 2 variants = 22 step validations per CI
run. RTL seeding reproduces the specific state machine the slider
`translate(50%, -50%)` bug needed to fail — had v2 been in place that
day, the regression would have fired before shipping.
## Docs
`src/uix/morfo/PERMUTATION_RUNNER.md` gains the v2 section (layout
plumbing, demo opt-in, URL variant table, `[initial seed]` step
semantics) and marks v1 + v2 as shipped 2026-04-22. v3 (morfo-inferred
per-component axis matrix) and v4 (MutationObserver ordering for Sema)
remain on the roadmap.
## Verification
- `npm run check`: 0 errors in soma/morfo/test-route scope.
- `npm run smoke`: 65/65 routes.
- `npm run morfo:check`: 66/66 morfos.
- `npm run perm:check`: 3/3 demos · 22 steps across 2 variants.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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