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docs: note Mini 3 Plus tracking-interval autoextend in IPC quick-ref (#197)#202

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docs: note Mini 3 Plus tracking-interval autoextend in IPC quick-ref (#197)#202
brockamer wants to merge 1 commit into
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docs/197-device-interval-autoextend

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Summary

Why

Future readers grepping CLAUDE.md for Garmin IPC behavior will need to know:

  1. The device may autonomously change tracking intervals mid-session
  2. MapShare KML ≠ IPC Outbound mc=0 ping count

Both were costly insights in this session that aren't in any spec we keep locally.

Test plan

  • No code changes — doc-only
  • Reads correctly as standalone bullet alongside existing IPC schema notes

🤖 Generated with Claude Code

During #197 investigation, real-device tracing confirmed the Mini 3
Plus autonomously flaps its tracking interval (mc=11 events with
status.intervalChange toggling between configured 120s and 14400s)
based on stationary detection. Worth documenting alongside the
existing IPC schema/auth quick-ref so future readers don't trip on
"why are there so few MapShare breadcrumbs" the same way #197 did.

Also notes that MapShare KML and IPC Outbound mc=0 streams are
independent — same window, different ping counts.

References #201 (decode + persist current interval) as the follow-up.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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