3.1.0 [26.2]

• The inspection utility now runs during normal Paper world generation as well as in the simulated inspect.cmd CLI. Inspection is disabled by default; enable it with inspect.enabled: true in config.yml.
• Configure a vertical X or Z slice with inspect.axis, sliceCoordinate, startChunk, and lengthChunks. The slice uses the configured generation area's Y bounds and must lie within that area.
• Inspection writes a source-world reference image, before-and-after generation-stage PNGs, and a combined sequence.png to inspect.output. Completed stages render asynchronously once their selected chunks have been captured.
• Per-chunk inspection captures are saved under <inspect.output>/captures and restored after a restart, allowing incomplete stage images to finish when the remaining chunks are generated. Keep the same inspection settings and output directory when resuming.
• The inspector, slice model, and rendering pipeline have moved into underilla-core; integrations can instrument a generation plan with UnderillaFactory.Builder.inspect(...).