Issues

• Stream large engine output over SSE instead of truncating at 2 MB

  backendenhancement
  pavlof01/jslab#40 · Filter by author pavlof01 opened on Aug 22, 2026

• Playwright end-to-end smoke tests in CI

  enhancement
  pavlof01/jslab#39 · Filter by author pavlof01 opened on Aug 22, 2026

• Expose rate-limit headers on successful responses

  backendenhancementgood first issue
  pavlof01/jslab#38 · Filter by author pavlof01 opened on Aug 22, 2026
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• Batch run endpoint POST /api/run/batch

  backendenhancement
  pavlof01/jslab#37 · Filter by author pavlof01 opened on Aug 22, 2026

• Engine version matrix: run one snippet against several engine builds

  backendenhancement
  pavlof01/jslab#36 · Filter by author pavlof01 opened on Aug 22, 2026

• Learn section: guided explainers backed by live embeds

  documentationenhancementfrontend
  pavlof01/jslab#35 · Filter by author pavlof01 opened on Aug 22, 2026

• Extend the abstract-operations tracer beyond conversion and equality

  backendenhancement
  pavlof01/jslab#34 · Filter by author pavlof01 opened on Aug 22, 2026

• Server-side snippet permalinks via POST /api/snippets

  backendcommunityenhancement
  pavlof01/jslab#33 · Filter by author pavlof01 opened on Aug 22, 2026

• Populate artifacts and add a Hermes bytecode inspector via hbcdump

  backendenhancementfrontend
  pavlof01/jslab#32 · Filter by author pavlof01 opened on Aug 22, 2026

• Inline-cache state visualizer built on --trace-ic

  enhancementfrontendvisualization
  pavlof01/jslab#31 · Filter by author pavlof01 opened on Aug 22, 2026

• Hidden-class transition visualizer built on --trace-maps

  enhancementfrontendvisualization
  pavlof01/jslab#30 · Filter by author pavlof01 opened on Aug 22, 2026

• Add a Result tab showing what the snippet actually prints

  enhancementfrontend
  pavlof01/jslab#29 · Filter by author pavlof01 opened on Aug 22, 2026

• Explain deoptimization reasons in --trace-deopt output

  documentationenhancementfrontend
  pavlof01/jslab#28 · Filter by author pavlof01 opened on Aug 22, 2026

• Report engine versions through the API and surface them in the UI

  backendenhancementfrontend
  pavlof01/jslab#27 · Filter by author pavlof01 opened on Aug 22, 2026

• Opcode reference pages at /docs/{engine}/{opcode}

  documentationenhancementfrontend
  pavlof01/jslab#26 · Filter by author pavlof01 opened on Aug 22, 2026

• Map bytecode lines back to source lines in the playground

  enhancementfrontendvisualization
  pavlof01/jslab#25 · Filter by author pavlof01 opened on Aug 22, 2026

• Heap Layout Visualizer (V8 logs)

  backendvisualization
  pavlof01/jslab#10 · Filter by author pavlof01 opened on Oct 6, 2025 · Phase 4 – Research Lab
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