- NoThrow diagnostics name compiler-resolved Node errors (class and message)
and explain parameters the frontend compiles as T | undefined because a
caller passes a possibly missing value (for example xs[i]!), naming that
call.
- Synthetic dynamic-class helpers (%dyn.*) carry the location of the code
that first needed them; they are no longer bound to annotations there.
- Int32 hints only parenthesize where needed; the NoThrow hint no longer
suggests try/catch, which does not discharge the contract.
- Diagnostics snapshots and TypeScript preflight/order baselines for the new
fixtures.
- Docs: /docs/contracts and a limitations entry.
The new docs page (/docs/threads) explains @scriptc/threads: a runnable
example that publishes a million-order ledger and sends it to four
workers, verified under Node.js 24 and as a scriptc executable; what
publish accepts and refuses, and that a refused publish leaves the graph
unchanged; the frozen-object TypeErrors of the write guard; a comparison
with Node's structured clone (constant-time sends, preserved classes and
identity, immortal objects) and the three rules that make a program
behave the same under both; the automatic sharing of deeply frozen
untyped data; and the cost model. The limitations page gains a Published
graphs section (immortality, class and identity differences, write-check
evaluation order, private fields) and links the new page from the
worker-threads section.
This is the first page added since the migration, so the route-test
fixture now accepts pages without a legacy URL, and the agent guide's
checklist for new pages names the fixture.
Chris Tate