Welcome back to Nostr Compass, your weekly guide to Nostr.

This week: the Marmot spec is marked adopted across 42 files as MDK cuts v0.9.0 through v0.9.3 with encrypted group avatars, external signer support, and MarmotKit iOS and Android bindings. Mostro ships Transport v2 on NIP-44 direct messages with anti-spam gates and a coexistence window in both mostrod v0.18.0 and Mobile v1.3.0. Bitchat 1.6.0 adds NIP-13 proof-of-work to geohash channel messages, an opt-in mesh-to-Nostr gateway that lets one online phone uplink a whole crowd, prekey bundles, transitive verification, and creator-managed encrypted private groups. Amber scopes profile subscriptions per account, fetches NIP-65 relay lists before profile metadata, and adds a live Tor status notification with a restart action. rust-nostr adds NIP-40 expiration to gift wrap and NIP-17 DM builders, anchored to the wrap’s randomized timestamp. Amethyst merges 43 PRs of negentropy sync hardening, NIP-50 full-text search infrastructure, and event kinds for niche verticals. Nostrord ships v2.0.0 and v2.1.0 with a folded relay pool, zombie WebSocket detection, and a full disk-first cache seam. Ngit v2.6.2, Jumble v26.7.1, Applesauce signers 6.2.2, Bray v1.33.0, Deepmarks 1.0.0, Bitcredit Core v0.5.13, Coop Mobile v0.2.4, Granary v11.0, Nostr-relay v0.0.244, Manent v1.4.0, Routstrd v0.3.7, Nymchat 1.0.1, and 21Meetup 1.1.0 also ship, and SafeBox marks Phase 3 substantially complete alongside a FreeBSD jail deployment runbook and an OpenETR spin-off for electronic transferable records. The NIPs repository merges a NIP-51 and NIP-37 name alignment and opens five proposals: NIP-AD Nostr Web Addresses, NIP-86 invite-code claim management, an HSL role color format, NIP-80 hardware-attested media provenance, and a pagination fix in NIP-01. Deep dives cover NIP-13 (proof-of-work) and NIP-40 (expiration timestamp).