- The ratified rename rider (world-unification §7 lane 5): "DOM" collided with the browser DOM and, post-lane-1, the structure is no longer a document tree. Comments and doc prose now say "the checked-dynamic tree" for the noun and "dyn" adjectivally; runtime symbol names (scr_dyn_*), the error.domClone libCall, and the real web DOMException family are unchanged.
- The few user-facing strings carrying the nickname move with it (the structuredClone cyclic message, the dc subscriber/publish fences, two emitter ICE texts); diagnostics snapshots regenerated (96 pass). One private compiler constant (DOM_PROTO_METHOD_NAMES -> DYN_PROTO_METHOD_NAMES) rides along.
- Mechanical sweep, 142 files, comments/prose only — no behavior change.
- Method values through Function.prototype.call/apply with a receiver that is provably not a URLSearchParams throw ERR_INVALID_THIS ('Value of "this" must be of type URLSearchParams') — the brand check runs before any conversion; searchParams-typed and dyn receivers keep their existing paths.
- Too few arguments throw ERR_MISSING_ARGS with Node's per-method messages before any conversion (the WHATWG arity ladder).
- Name/value slots convert with ToPrimitive's string hint: statically-string args lower directly, symbols throw V8's 'Cannot convert a Symbol value to a string' TypeError, and every other value coerces through the DOM — a user toString/valueOf member is CALLED and its throw propagates (scr_dyn_string_coerce_js, the new dyn.toStringCoerce libCall); func-carrying records box just their toString member into a DOM carrier.
- error.nodeThrow is the new compiler-resolved Node-parity throw for always-throwing lowered arms (the global.undefRead polymorphic-result pattern), shared by these ladders and future ones.
- Corpus 2557 pins the whole surface byte-identically on both backends, including the stringifier's post-sort re-serialization.
- executable expansion in scr_console.c is byte-identical fputs/vfprintf + abort; core expansion in the new scr_core.c poisons, delivers to the registered sink exactly once, aborts pre-registration or if the sink returns
- 89 fputs/fprintf+abort pairs and 10 bare OOM aborts across the 20 core-linkable TUs now funnel; lazy atexit teardowns (json errdyn, regex bytecodes, symbol registry) reroute to the core reset registry via scr_atexit
- scr_core.c owns sink/poison/result-arena/reset-registry/marshalling helpers; scr_exception.c renders escaped exceptions as "Uncaught ..." into the funnel; scr_lib exposes its cleanup to the reset seam
Chris Tate