fix: implement call-site scoping for captured refs #259
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- Definitions are normalized (no Obj/EndObj wrapper) - Call sites decide scoping based on capture and return type - Universal preamble wraps every entrypoint: Obj → Trampoline → EndObj → Return - Layout starts at address 0 (preamble is first instruction) - StepId now uses u16 (0 is valid address, terminal handled by decoding logic)
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Summary
Trampolinebytecode instruction for universal entry preambleObj/EndObjfrom definitions to call sites (call-site scoping)Obj → Trampoline → EndObj → ReturnEndObjmaterializer to preserve pending values for non-struct resultsWhy
Fixes Bug 3: mixed captured/uncaptured sibling refs were losing data at runtime.
Before:
A = (program (B) @b (C))produced{b: {x: ...}}—yfrom C was missing.After: produces
{b: {x: ...}, y: ...}— both captured and uncaptured refs work correctly.The root cause was that definitions decided whether to wrap with
Obj/EndObjbased on their own captures, but the correct behavior depends on how the definition is called:(B) @b→ needs isolated scope(B)→ captures should bubble to parentNotes
has_direct_captureslogic from PR fix: skipObj/EndObjfor definitions without direct captures #257 (now removed)