canon 0.2.1

Compile-safe Flutter navigation from a single grammar.

0.2.1

• Handle verbs (goX/go(Hop)) are edge-required: a target unreachable from the live top throws instead of silently teleporting via the canonical fallback, and guaranteed pop/popTo throw when impossible — both release-active (replacing debug-only asserts). Stale-but-still-legal navigations still resolve; the global Screen.goX teleport is unchanged.

0.2.0

• Stale-codegen guard: Screen.isCodegenFresh + a boot-time assert flag a tree that was re-parented without regenerating.
• Replace the again back-edge with cycled (folds a completed duplicate cycle) and stacked (stacks a fresh instance, preserving history).

0.1.0

• Initial release.