feat: JS compile target (--emit js, ES modules)#713
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Implements ILO-73 MVP: src/codegen/js.rs mirrors python.rs, wires --emit js in CLI, and verifies fac/fib compile to runnable Node.js. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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This was referenced May 22, 2026
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- Add --emit js / --emit python to CLI invocation section of SPEC.md (PR #713, ILO-73) - Update tokcount entry: native uses tiktoken-rs cl100k_base BPE; WASM falls back to bytes/3.4 stub (PR #716, ILO-413) - Add idxof builtin entry to SPEC.md builtins table (O n, code-point index, 0.13.0) - Mirror all three fixes into skills/ilo/ilo-builtins-text.md - Regenerate ai.txt via cargo build Co-authored-by: Daniel Morris <daniel@cubitts.com> Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
src/codegen/js.rsmirroringpython.rs— emits ES modules withconst fn = (...args) => { ... }arrow functions--emit jsflag in CLI alongside existing--emit pythonmake-id→makeId)len→.length,abs/min/max/flr/cel→Math.*,str→String(), list spread for append, etc.fac(5)=120,fib(10)=55)Deferred (follow-up tickets)
_iloUnwrapis referenced but not emitted)_typekey, mirrors Python)--emit jsintegration test in the CLI test harnessTest plan
cargo test codegen::js— 12/12 passilo examples/recursion.ilo --emit js | node -e "$(cat); console.log(fac(5), fib(10))"→120 55ilo 'f x:n>n;*x 2' --emit jsproduces valid ES moduleCloses ILO-73
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