The "depth" setting with values quick/standard/comprehensive implied
investigation thoroughness, but it only controls phase count. Renamed to
"granularity" with values coarse/standard/fine to accurately reflect what
it controls: how finely scope is sliced into phases.
Includes backward-compatible migration in loadConfig and config-ensure
that auto-renames depth→granularity with value mapping in both
.planning/config.json and ~/.gsd/defaults.json.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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