docs: condense AGENTS.md to verified, current knowledge

[Bre77]

Intent

• AGENTS.md had accreted to 29,888 bytes, much of it duplicating what the repo already shows. Rewritten to 16,428 bytes (-45%) so it stays worth reading in full at the top of every agent session.
  • Every retained claim was checked against the current source before keeping it — file paths, scripts, config keys, service/subType wiring, CI job structure. Nothing was kept on faith; nothing verified was dropped.
  • Removed: the ASCII directory tree, per-package source-file and node/operation inventories (the file itself already warned these go stale), the duplicate "Key Architecture Decisions" / "Important Files" sections restating facts stated elsewhere, generic upstream doc links, and narrative about the Homebridge package superseding the legacy hand-published one — its still-load-bearing part (publishing needs npm trusted publishing registered) is kept as one line.
  • Preserved verbatim in substance: all "must never/must always" contracts — token-in-query-string log stripping, super.on() ordering, contact-sensor polarity, subType collision rules, the null vs undefined tariff distinction, the needs: validate publish gate, and the pnpm/action-setup version-sync rule.
  • Kept the ## Maintaining this file self-governance section so the next pass has the same bar.

Docs-only; no code touched. pnpm lint clean and pnpm test green (nothing references the removed content programmatically).

🤖 Generated with Claude Code

https://claude.ai/code/session_012ZzhkTRstc5jp6h7aN9g2a