{"version":"2.1.86","anchor":"compact-line-number-prefix-format","canonical_anchor":"compact-line-number-prefix-format","heading":"Compact Line Number Prefix Format","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.86\/e\/compact-line-number-prefix-format","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.86","markdown":"### Compact Line Number Prefix Format\n\nThe Read tool output format is being updated from `spaces + line number + arrow` to a more compact `line number + tab` format. The Edit tool description dynamically adapts to tell the model which format is in use, reducing confusion when matching indentation.\n\n**Evidence**\n\nDynamic format description (search for `\"line number + tab\"`) \u2014 controlled by `tengu_compact_line_prefix_killswitch`\n\n**[Gradual Rollout]** \u2014 gated by `tengu_compact_line_prefix_killswitch` feature flag."}