Bug: browser compatibility of @accordproject/template-engine with Vite

[Satvik77777]

Summary

Investigated whether @accordproject/template-engine and cicero-core
can run inside the playground's Vite browser build.

Build: PASSES ✅

npm run build completes successfully with both packages imported.
No blocking errors at bundle time.

Runtime: FAILS ❌

Browser console shows:

Uncaught TypeError: Cannot read properties of undefined (reading 'Z_SYNC_FLUSH')
at axios → httparchiveloader → templateloader → template

Root cause (confirmed via grep)

axios/lib/adapters/http.js imports Node's zlib module and uses
zlib.constants.Z_SYNC_FLUSH for HTTP decompression. In a browser
build, zlib.constants is undefined, causing the crash.

This is triggered when cicero-core's archive loader uses axios to
fetch external models from models.accordproject.org.

Proposed fix

Pass { offline: true } to fromArchive() to skip external model
fetching entirely. This avoids the axios/zlib path and relies only
on JSZip for archive decompression, which is browser-compatible.

Alternatively, a Vite alias can force axios to use its browser
adapter (xhr.js) instead of http.js.

Next steps

• Test fromArchive(buffer, { offline: true })
• Verify JavaScriptEvaluator.evalDangerously separately
• Open draft PR with ExecutionService skeleton

[Divyansh2992]

I'd like to work on this

[ML-dev-crypto]

Hi, I noticed this issue has been open for a while , I’d like to work on it. I’ve investigated the browser runtime crash and validated a fix locally. I’ll share details and open a PR shortly.