5.0.4

Added

• FieldBuilder#noSync() — chainable modifier that marks a field as
  local-only. The field is still typed on the inferred instance and
  still honors .default() / .optional() / collection auto-instantiation,
  but it is never registered for synchronization: it skips change tracking,
  is never encoded, and decoders never receive it. Useful for server-side
  scratch state or per-peer UI state you want on the class for typing
  convenience without paying any sync cost.

  const Player = schema({
      hp: t.uint8().default(100),          // synchronized
      lastInputTick: t.number().noSync(),  // local-only, never sent
  }, 'Player');

  Combining .noSync() with a sync-only modifier (.view(), .owned(),
  .unreliable(), .transient(), .static(), .stream()) throws at
  schema() time, since a local-only field cannot be synchronized.

Changed

• FieldBuilder's internal configuration fields (_type, _default,
  _view, _noSync, …) and toDefinition() are now declared private,
  so editor autocomplete on t.number(). surfaces only the chainable
  fluent modifiers. The fields remain reachable at runtime via element
  access (e.g. builder['_noSync']) for internal tooling, but are no
  longer part of the intended public API.

Fixed

• npm test now points at mocha's JS entry (node_modules/mocha/bin/mocha.js)
  instead of the .bin/mocha shim. Under pnpm the shim is a POSIX shell
  script, which tsx tried to parse as JavaScript and failed with
  SyntaxError: missing ) after argument list.
• Resolved a duplicate typecheck script key in package.json; the
  build-config typecheck is now available as typecheck:build.