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Background knowledge about how hashtags work on the Fediverse, including at the ActivityPub wire-format level. Load when the user asks about implementing hashtags, detecting hashtag support in a codebase, how hashtag federation works, why hashtag search returns incomplete results, how to follow hashtags, the Hashtag type in ActivityPub, the tag property on Note objects, case sensitivity in hashtag

Background knowledge about WriteFreely, the open-source federated blogging platform written in Go (AGPL-3.0) by Matt Baer / Musing Studio. Covers the origin story (Write.as anonymous writing platform launched 2014, open-sourced as WriteFreely November 2018 after adding ActivityPub), the write-only/broadcast federation model (blogs can be followed but cannot follow others, no incoming comments/repl

Detects whether a codebase implements the NodeInfo protocol endpoint. NodeInfo is a standard used by Fediverse and federated social network servers to expose metadata about the instance (software name, version, protocols supported, user counts, etc.). Use this skill whenever the user asks whether a repo or codebase supports NodeInfo, has a /.well-known/nodeinfo endpoint, exposes instance metadata,

Background knowledge about Mastodon, the dominant federated microblogging platform and de facto reference implementation for ActivityPub social networking. Covers Mastodon's JSON-LD @context structure (three-element array: activitystreams, security/v1, inline object defining toot: http://joinmastodon.org/ns# with Emoji/discoverable/featured/featuredTags/ blurhash/votersCount/indexable/memorial/sus

Detects whether a codebase implements the WebFinger protocol endpoint (RFC 7033). Use this skill whenever the user asks whether a repo, project, or codebase supports WebFinger, has a /.well-known/webfinger endpoint, implements the JRD response format, or handles acct: URI lookups. Also trigger when the user is auditing a codebase for ActivityPub or federated identity support, since WebFinger is a

Background knowledge about Pixelfed, the decentralized photo and video sharing platform. Load when the user asks about implementing a Pixelfed- compatible ActivityPub server, federating with Pixelfed instances, Pixelfed's actor model (Person actors, Application instance actor), Pixelfed's supported ActivityPub activities (Accept, Add, Announce, Create, Delete, Flag, Follow, Like, Reject, Undo, Upd

Background knowledge about how following works on the Fediverse, including at the ActivityPub wire-format level. Load when the user asks about implementing follows, the Follow/Accept/Reject/Undo activity flow, locked vs unlocked accounts, the followers and following collections, shared inboxes, delivery of posts to followers, how follower-only posts work, account migration with the Move activity,

Background knowledge about Lemmy, the federated link aggregation and discussion platform (Reddit alternative). Covers Lemmy's fundamental architectural decision of Communities as Group actors that automatically Announce all content to followers, the ActivityPub object type mappings (Post as Page with mandatory title, Comment as Note with inReplyTo tree, Community as Group, User as Person, Instance

Background knowledge about FEP-ef61 Portable Objects and server-independent identity in ActivityPub, including the ap:// URI scheme with DIDs as authority, the did:key and did:ap:key DID methods, the gateway and resolver mechanism (/.well-known/apgateway), the gateways property on portable actors, integrity proofs (FEP-8b32 / eddsa-jcs-2022), origin-based authentication (FEP-fe34), identity proofs

Background knowledge about how HTTP Signatures work in ActivityPub and the Fediverse, including the signing and verification process, the public key model, authorized fetch / secure mode, key rotation, instance actors, and known interoperability quirks across implementations. Load when the user asks about implementing HTTP signatures, debugging signature verification failures, the Digest header, t

Background knowledge about FEP-82f6 Actor statuses, an ActivityPub extension for short, non-interactable profile status text. Covers the ActorStatus type (content, endTime expiration, attachment for rich metadata like now-playing), actor fields (status for current inlined status, statusHistory collection), activities (Create to set, Remove to clear from profile but keep in history, Delete to remov

Background knowledge about Activity Intents on the Fediverse, based on FEP-3b86 (DRAFT status). Covers how servers publish machine-readable URL templates via WebFinger for cross-server social interactions (Follow, Like, Announce, Create, etc.), the rel namespace convention (https://w3id.org/fep/3b86/*), RFC 6570 URI Templates with parameter placeholders, the 28 standard activity intents plus the O