Interactive Playground

Experiment with Branchline directly in your browser—no installs required. The layout below is full-width to give editors more room. Pick an example, edit the program and input, enable tracing, and run.

Tips: Cmd/Ctrl + Enter runs. Switch JSON/XML input. Toggle tracing for EXPLAIN(...). Changing examples resets the editors.

Open in new tab Use ?example=<id> in the URL to preload an example (e.g., ?example=stdlib-hof-overview).

Curated examples (all preserved)

• collection-transforms — MAP/FILTER/REDUCE style array work
• customer-profile — basic enrichment and null coalescing
• explain-derived-total — enable tracing to see EXPLAIN output
• junit-badge-summary — XML parsing and normalization
• order-shipment — object reshaping and path navigation
• pipeline-health-gating — ASSERT/CHECKPOINT with trace
• Standard library coverage: stdlib-core-keys-values, stdlib-core-put-delete, stdlib-core-append-prepend, stdlib-core-walk, stdlib-arrays-overview, stdlib-agg-overview, stdlib-strings-casts, stdlib-strings-text, stdlib-hof-overview, stdlib-debug-explain, stdlib-time-now

Troubleshooting

• If the embed does not appear, open the new-tab link above.
• XML inputs are parsed into objects; attributes use the @attr convention and text nodes use #text.
• The playground runs entirely in your browser using the Kotlin/JS interpreter; no data leaves your machine.