{"generator":"GNU social 2.0.2-dev","title":"Conversation","totalItems":7,"items":[{"actor":{"id":"https:\/\/mastodon.social\/users\/obenland","displayName":"Konstantin Obenland","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/304101-original-tmp20241207205854.webp","rel":"avatar","type":"image\/webp","width":400,"height":400},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-96-20241207205854.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-48-20241207205854.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-24-20241207205854.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"304101"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/304101-96-20241207205854.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"Building ActivityPub for WordPress since 2024","url":"https:\/\/mastodon.social\/@obenland","portablecontacts_net":{"preferredUsername":"obenland","displayName":"Konstantin Obenland","note":"Building ActivityPub for WordPress since 2024"}},"content":"

@silverpill<\/a> @activitypub.blog<\/a> Oh, I did not consider that! That's right!<\/p>","generator":{"id":"tag:gnusocial.jp,2026-10-14:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114835401451575601","object":{"id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114835401451575601","objectType":"note","content":"

@silverpill<\/a> @activitypub.blog<\/a> Oh, I did not consider that! That's right!<\/p>","url":"https:\/\/mastodon.social\/@obenland\/114835401451575601","status_net":{"notice_id":null},"inReplyTo":{"objectType":"note","id":"https:\/\/mitra.social\/objects\/0197f974-2928-d593-ada4-54915071c5ff","url":"https:\/\/mitra.social\/objects\/0197f974-2928-d593-ada4-54915071c5ff"}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/mitra.social\/users\/silverpill"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/activitypub.blog"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2025-07-10:objectType=thread:nonce=f39a9494691725e2","notice_info":{"local_id":"10491734","source":"ActivityPub"}},"published":"2025-07-13T23:05:03+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mastodon.social\/@obenland\/114835401451575601"},{"actor":{"id":"https:\/\/mitra.social\/users\/silverpill","displayName":"silverpill","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/85321-original-tmp20230105183734.webp","rel":"avatar","type":"image\/webp","width":800,"height":800},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-48-20230105202807.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-24-20230105202807.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"85321"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance.","url":"https:\/\/mitra.social\/users\/silverpill","portablecontacts_net":{"preferredUsername":"silverpill","displayName":"silverpill","note":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance."}},"content":"

@obenland<\/a> I didn't realize that either, and it makes FEP-844e less attractive. However, capability discovery might still be preferable to double-knocking because RFC-9421 is not the last upgrade. Some applications are already starting to use EdDSA signatures, and that requires triple knocking. In the future we will need to switch to post-quantum cryptography and so on. The number of knocks always increases, but capability discovery requires a constant number of requests.<\/p>

#rfc9421<\/a><\/p>","generator":{"id":"tag:gnusocial.jp,2026-10-14:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mitra.social\/objects\/019805fc-70bf-8843-99c9-3c1cb0269951","object":{"id":"https:\/\/mitra.social\/objects\/019805fc-70bf-8843-99c9-3c1cb0269951","objectType":"note","content":"

@obenland<\/a> I didn't realize that either, and it makes FEP-844e less attractive. However, capability discovery might still be preferable to double-knocking because RFC-9421 is not the last upgrade. Some applications are already starting to use EdDSA signatures, and that requires triple knocking. In the future we will need to switch to post-quantum cryptography and so on. The number of knocks always increases, but capability discovery requires a constant number of requests.<\/p>

#rfc9421<\/a><\/p>","url":"https:\/\/mitra.social\/objects\/019805fc-70bf-8843-99c9-3c1cb0269951","status_net":{"notice_id":null},"inReplyTo":{"objectType":"note","id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114835401451575601","url":"https:\/\/mastodon.social\/@obenland\/114835401451575601"}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/mastodon.social\/users\/obenland"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2025-07-10:objectType=thread:nonce=f39a9494691725e2","notice_info":{"local_id":"10491735","source":"ActivityPub"}},"published":"2025-07-13T23:05:02+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mitra.social\/objects\/019805fc-70bf-8843-99c9-3c1cb0269951"},{"actor":{"id":"https:\/\/mitra.social\/users\/silverpill","displayName":"silverpill","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/85321-original-tmp20230105183734.webp","rel":"avatar","type":"image\/webp","width":800,"height":800},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-48-20230105202807.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-24-20230105202807.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"85321"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance.","url":"https:\/\/mitra.social\/users\/silverpill","portablecontacts_net":{"preferredUsername":"silverpill","displayName":"silverpill","note":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance."}},"content":"

@obenland<\/a> I would prefer to keep implements because there are 4 or 5 implementations of this FEP already... The clash with a reserved keyword in some languages shouldn't be a big problem -- type is even more common keyword yet it is everywhere in ActivityPub.<\/p>","generator":{"id":"tag:gnusocial.jp,2026-10-14:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mitra.social\/objects\/01980604-bf99-10e8-277d-fbc61fcb3192","object":{"id":"https:\/\/mitra.social\/objects\/01980604-bf99-10e8-277d-fbc61fcb3192","objectType":"note","content":"

@obenland<\/a> I would prefer to keep implements because there are 4 or 5 implementations of this FEP already... The clash with a reserved keyword in some languages shouldn't be a big problem -- type is even more common keyword yet it is everywhere in ActivityPub.<\/p>","url":"https:\/\/mitra.social\/objects\/01980604-bf99-10e8-277d-fbc61fcb3192","status_net":{"notice_id":null},"inReplyTo":{"objectType":"note","id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114832095429969640","url":"https:\/\/mastodon.social\/@obenland\/114832095429969640"}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/mastodon.social\/users\/obenland"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2025-07-10:objectType=thread:nonce=f39a9494691725e2","notice_info":{"local_id":"10491713","source":"ActivityPub"}},"published":"2025-07-13T23:01:03+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mitra.social\/objects\/01980604-bf99-10e8-277d-fbc61fcb3192"},{"actor":{"id":"https:\/\/mastodon.social\/users\/obenland","displayName":"Konstantin Obenland","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/304101-original-tmp20241207205854.webp","rel":"avatar","type":"image\/webp","width":400,"height":400},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-96-20241207205854.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-48-20241207205854.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-24-20241207205854.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"304101"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/304101-96-20241207205854.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"Building ActivityPub for WordPress since 2024","url":"https:\/\/mastodon.social\/@obenland","portablecontacts_net":{"preferredUsername":"obenland","displayName":"Konstantin Obenland","note":"Building ActivityPub for WordPress since 2024"}},"content":"

@silverpill<\/a> @activitypub.blog<\/a> `implements` is a keyword in PHP, Java, TypeScript, that some quality tools will flag if used as a variable in function signatures. It was fine in our case as a class property, but it's possible others might run into something like that. <\/p>

Maybe there are alternatives that could be considered? `supports`?<\/p>","generator":{"id":"tag:gnusocial.jp,2026-10-14:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114832095429969640","object":{"id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114832095429969640","objectType":"note","content":"

@silverpill<\/a> @activitypub.blog<\/a> `implements` is a keyword in PHP, Java, TypeScript, that some quality tools will flag if used as a variable in function signatures. It was fine in our case as a class property, but it's possible others might run into something like that. <\/p>

Maybe there are alternatives that could be considered? `supports`?<\/p>","url":"https:\/\/mastodon.social\/@obenland\/114832095429969640","status_net":{"notice_id":null},"inReplyTo":{"objectType":"note","id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114832065722301630","url":"https:\/\/mastodon.social\/@obenland\/114832065722301630"}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/mitra.social\/users\/silverpill"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/activitypub.blog"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2025-07-10:objectType=thread:nonce=f39a9494691725e2","notice_info":{"local_id":"10491712","source":"ActivityPub"}},"published":"2025-07-13T23:01:03+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mastodon.social\/@obenland\/114832095429969640"},{"actor":{"id":"https:\/\/mitra.social\/users\/silverpill","displayName":"silverpill","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/85321-original-tmp20230105183734.webp","rel":"avatar","type":"image\/webp","width":800,"height":800},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-48-20230105202807.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-24-20230105202807.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"85321"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance.","url":"https:\/\/mitra.social\/users\/silverpill","portablecontacts_net":{"preferredUsername":"silverpill","displayName":"silverpill","note":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance."}},"content":"

@obenland<\/a> @activitypub.blog<\/a><\/p>

>pre-flight requests<\/p>

This is needed for signed GET requests, right? Because when POSTing to inbox, the actor (and its capabilities) should be already known.<\/p>","generator":{"id":"tag:gnusocial.jp,2026-10-14:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mitra.social\/objects\/0197f974-2928-d593-ada4-54915071c5ff","object":{"id":"https:\/\/mitra.social\/objects\/0197f974-2928-d593-ada4-54915071c5ff","objectType":"note","content":"

@obenland<\/a> @activitypub.blog<\/a><\/p>

>pre-flight requests<\/p>

This is needed for signed GET requests, right? Because when POSTing to inbox, the actor (and its capabilities) should be already known.<\/p>","url":"https:\/\/mitra.social\/objects\/0197f974-2928-d593-ada4-54915071c5ff","status_net":{"notice_id":null},"inReplyTo":{"objectType":"note","id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114832065722301630","url":"https:\/\/mastodon.social\/@obenland\/114832065722301630"}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/mastodon.social\/users\/obenland"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/activitypub.blog"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2025-07-10:objectType=thread:nonce=f39a9494691725e2","notice_info":{"local_id":"10469619","source":"ActivityPub"}},"published":"2025-07-11T12:27:42+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mitra.social\/objects\/0197f974-2928-d593-ada4-54915071c5ff"},{"actor":{"id":"https:\/\/mastodon.social\/users\/obenland","displayName":"Konstantin Obenland","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/304101-original-tmp20241207205854.webp","rel":"avatar","type":"image\/webp","width":400,"height":400},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-96-20241207205854.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-48-20241207205854.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/304101-24-20241207205854.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"304101"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/304101-96-20241207205854.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"Building ActivityPub for WordPress since 2024","url":"https:\/\/mastodon.social\/@obenland","portablecontacts_net":{"preferredUsername":"obenland","displayName":"Konstantin Obenland","note":"Building ActivityPub for WordPress since 2024"}},"content":"

@silverpill<\/a> @activitypub.blog<\/a> I think the main motivation for me to add it was to advertise our new support for #RFC9421<\/a>. Having a proposed standardized way to do that felt neat.<\/p>

On the receiving end, I'm not sure we'd do any pre-flight requests to understand what an instance implements before acting on it, we'd probably rather stay conservative or do things like double-knock with caching, would be my guess. Might be different if it was something we could grab with a HEAD req.<\/p>","generator":{"id":"tag:gnusocial.jp,2026-10-14:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114832065722301630","object":{"id":"https:\/\/mastodon.social\/users\/obenland\/statuses\/114832065722301630","objectType":"note","content":"

@silverpill<\/a> @activitypub.blog<\/a> I think the main motivation for me to add it was to advertise our new support for #RFC9421<\/a>. Having a proposed standardized way to do that felt neat.<\/p>

On the receiving end, I'm not sure we'd do any pre-flight requests to understand what an instance implements before acting on it, we'd probably rather stay conservative or do things like double-knock with caching, would be my guess. Might be different if it was something we could grab with a HEAD req.<\/p>","url":"https:\/\/mastodon.social\/@obenland\/114832065722301630","status_net":{"notice_id":null},"inReplyTo":{"objectType":"note","id":"https:\/\/mitra.social\/objects\/0197f675-2ff9-9477-ff63-79242ebea3a4","url":"https:\/\/mitra.social\/objects\/0197f675-2ff9-9477-ff63-79242ebea3a4"},"tags":[{"objectType":"http:\/\/activityschema.org\/object\/hashtag","displayName":"rfc9421"}]},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/mitra.social\/users\/silverpill"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/activitypub.blog"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2025-07-10:objectType=thread:nonce=f39a9494691725e2","notice_info":{"local_id":"10469618","source":"ActivityPub"}},"published":"2025-07-11T12:27:42+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mastodon.social\/@obenland\/114832065722301630"},{"actor":{"id":"https:\/\/mitra.social\/users\/silverpill","displayName":"silverpill","status_net":{"avatarLinks":[{"url":"https:\/\/gnusocial.jp\/avatar\/85321-original-tmp20230105183734.webp","rel":"avatar","type":"image\/webp","width":800,"height":800},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-48-20230105202807.webp","rel":"avatar","type":"image\/webp","width":48,"height":48},{"url":"https:\/\/gnusocial.jp\/avatar\/85321-24-20230105202807.webp","rel":"avatar","type":"image\/webp","width":24,"height":24}],"profile_info":{"local_id":"85321"}},"image":{"url":"https:\/\/gnusocial.jp\/avatar\/85321-96-20230105202806.webp","rel":"avatar","type":"image\/webp","width":96,"height":96},"objectType":"person","summary":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance.","url":"https:\/\/mitra.social\/users\/silverpill","portablecontacts_net":{"preferredUsername":"silverpill","displayName":"silverpill","note":"Developer of ActivityPub-based micro-blogging and content subscription platform Mitra. Admin of mitra.social instance."}},"content":"

@activitypub.blog<\/a><\/p>

Documented support for FEP-844e.<\/p>

Cool, I'll add you to the implementation list.
Do you have any feedback, or suggestions? This FEP is very new and probably needs refinement<\/p>","generator":{"id":"tag:gnusocial.jp,2026-10-14:notice-source:ActivityPub","objectType":"application","status_net":{"source_code":"ActivityPub"}},"id":"https:\/\/mitra.social\/objects\/0197f675-2ff9-9477-ff63-79242ebea3a4","object":{"id":"https:\/\/mitra.social\/objects\/0197f675-2ff9-9477-ff63-79242ebea3a4","objectType":"note","content":"

@activitypub.blog<\/a><\/p>

Documented support for FEP-844e.<\/p>

Cool, I'll add you to the implementation list.
Do you have any feedback, or suggestions? This FEP is very new and probably needs refinement<\/p>","url":"https:\/\/mitra.social\/objects\/0197f675-2ff9-9477-ff63-79242ebea3a4","status_net":{"notice_id":null}},"to":[{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/person","id":"https:\/\/activitypub.blog"},{"objectType":"http:\/\/activitystrea.ms\/schema\/1.0\/collection","id":"http:\/\/activityschema.org\/collection\/public"}],"status_net":{"conversation":"tag:gnusocial.jp,2025-07-10:objectType=thread:nonce=f39a9494691725e2","notice_info":{"local_id":"10464203","source":"ActivityPub"}},"published":"2025-07-10T22:41:17+00:00","provider":{"objectType":"service","displayName":"GNU social JP","url":"https:\/\/gnusocial.jp\/"},"verb":"post","url":"https:\/\/mitra.social\/objects\/0197f675-2ff9-9477-ff63-79242ebea3a4"}],"links":[{"url":"https:\/\/gnusocial.jp\/conversation\/5333820","rel":"alternate","type":"text\/html"}]}