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CIRCLE WITH A DOT

  1. Home
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  3. I would like to give an update on "federation" on Bluesky.

I would like to give an update on "federation" on Bluesky.

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  • mcc@mastodon.socialM mcc@mastodon.social

    :frogsiren: BLUESKY HAS OFFICIALLY NETSPLIT :frogsiren:

    There has always been more than one Fediverse. Different instances make different moderation decisions so some instances can't see posts by some users.

    There has only ever been one Bluesky because every ATProto frontend uses the same Appview.

    It is January 2026 and that's no longer true; Blacksky's Appview is available for beta use and there is at least 1 user banned on Bluesky but not Blacksky. And vice versa.

    Link Preview Image
    Rudy wants revolution. (@rude1.blacksky.team)

    Bluesky runs an appview. Blacksky runs an appview. A complete appview is a several terabytes sized database of the >18 billion follows, likes and posts of all bsky users, ever and forever. To run a different appview is to make a fork in bsky’s timeline. One has new posts from Łink. One doesn’t.

    favicon

    Bluesky Social (bsky.app)

    mayintoronto@beige.partyM This user is from outside of this forum
    mayintoronto@beige.partyM This user is from outside of this forum
    mayintoronto@beige.party
    wrote on last edited by
    #285

    @mcc Would this mean that there'd be a new bridgy specifically to Blacksky?

    quillmatiq@mastodon.socialQ 1 Reply Last reply
    0
    • mayintoronto@beige.partyM mayintoronto@beige.party

      @mcc Would this mean that there'd be a new bridgy specifically to Blacksky?

      quillmatiq@mastodon.socialQ This user is from outside of this forum
      quillmatiq@mastodon.socialQ This user is from outside of this forum
      quillmatiq@mastodon.social
      wrote on last edited by
      #286

      @mayintoronto No - Bridgy Fed supports any ATProto PDS, including the ones run by Blacksky

      @mcc

      martinvermeer@fediscience.orgM 1 Reply Last reply
      0
      • mcc@mastodon.socialM mcc@mastodon.social

        :frogsiren: BLUESKY HAS OFFICIALLY NETSPLIT :frogsiren:

        There has always been more than one Fediverse. Different instances make different moderation decisions so some instances can't see posts by some users.

        There has only ever been one Bluesky because every ATProto frontend uses the same Appview.

        It is January 2026 and that's no longer true; Blacksky's Appview is available for beta use and there is at least 1 user banned on Bluesky but not Blacksky. And vice versa.

        Link Preview Image
        Rudy wants revolution. (@rude1.blacksky.team)

        Bluesky runs an appview. Blacksky runs an appview. A complete appview is a several terabytes sized database of the >18 billion follows, likes and posts of all bsky users, ever and forever. To run a different appview is to make a fork in bsky’s timeline. One has new posts from Łink. One doesn’t.

        favicon

        Bluesky Social (bsky.app)

        coracinho@sunbeam.cityC This user is from outside of this forum
        coracinho@sunbeam.cityC This user is from outside of this forum
        coracinho@sunbeam.city
        wrote on last edited by
        #287

        @mcc for us tech noobies in the audience, could you explain what does this mean?

        mcc@mastodon.socialM 1 Reply Last reply
        0
        • mcc@mastodon.socialM mcc@mastodon.social

          :frogsiren: BLUESKY HAS OFFICIALLY NETSPLIT :frogsiren:

          There has always been more than one Fediverse. Different instances make different moderation decisions so some instances can't see posts by some users.

          There has only ever been one Bluesky because every ATProto frontend uses the same Appview.

          It is January 2026 and that's no longer true; Blacksky's Appview is available for beta use and there is at least 1 user banned on Bluesky but not Blacksky. And vice versa.

          Link Preview Image
          Rudy wants revolution. (@rude1.blacksky.team)

          Bluesky runs an appview. Blacksky runs an appview. A complete appview is a several terabytes sized database of the >18 billion follows, likes and posts of all bsky users, ever and forever. To run a different appview is to make a fork in bsky’s timeline. One has new posts from Łink. One doesn’t.

          favicon

          Bluesky Social (bsky.app)

          mcc@mastodon.socialM This user is from outside of this forum
          mcc@mastodon.socialM This user is from outside of this forum
          mcc@mastodon.social
          wrote on last edited by
          #288

          The "portable identity" elements of Bluesky/ATProto make the netsplit just a tad odd. My account is hosted on a PDS server I run, so I'm beholden to no frontend. If I log in through the main Blacksky frontend (Bluesky appview) one user I'm following shows only an error message. Via the Staging Blacksky frontend (atproto.africa), I can see I'm following him and see his posts. I'm SO curious about the edge cases. I assume if I boost him it's hidden from the Bluesky appview. What if I reply to him?

          fabrice@fosstodon.orgF mcc@mastodon.socialM 2 Replies Last reply
          0
          • mcc@mastodon.socialM mcc@mastodon.social

            The "portable identity" elements of Bluesky/ATProto make the netsplit just a tad odd. My account is hosted on a PDS server I run, so I'm beholden to no frontend. If I log in through the main Blacksky frontend (Bluesky appview) one user I'm following shows only an error message. Via the Staging Blacksky frontend (atproto.africa), I can see I'm following him and see his posts. I'm SO curious about the edge cases. I assume if I boost him it's hidden from the Bluesky appview. What if I reply to him?

            fabrice@fosstodon.orgF This user is from outside of this forum
            fabrice@fosstodon.orgF This user is from outside of this forum
            fabrice@fosstodon.org
            wrote on last edited by
            #289

            @mcc When you are suspended by bluesky corp, is the ban at the app view or PDS level?

            mcc@mastodon.socialM 1 Reply Last reply
            0
            • quillmatiq@mastodon.socialQ quillmatiq@mastodon.social

              @mayintoronto No - Bridgy Fed supports any ATProto PDS, including the ones run by Blacksky

              @mcc

              martinvermeer@fediscience.orgM This user is from outside of this forum
              martinvermeer@fediscience.orgM This user is from outside of this forum
              martinvermeer@fediscience.org
              wrote on last edited by
              #290

              @quillmatiq @mayintoronto @mcc But what if I want to cancel the bridge, but only to the Nazi one? Can I do that, and advise my correspondents to migrate to BlackSky? How hard would that be?

              quillmatiq@mastodon.socialQ 1 Reply Last reply
              0
              • martinvermeer@fediscience.orgM martinvermeer@fediscience.org

                @quillmatiq @mayintoronto @mcc But what if I want to cancel the bridge, but only to the Nazi one? Can I do that, and advise my correspondents to migrate to BlackSky? How hard would that be?

                quillmatiq@mastodon.socialQ This user is from outside of this forum
                quillmatiq@mastodon.socialQ This user is from outside of this forum
                quillmatiq@mastodon.social
                wrote on last edited by
                #291

                @martinvermeer Not today, but stay tuned for next week 🙂

                @mayintoronto @mcc

                1 Reply Last reply
                0
                • mcc@mastodon.socialM mcc@mastodon.social

                  The "portable identity" elements of Bluesky/ATProto make the netsplit just a tad odd. My account is hosted on a PDS server I run, so I'm beholden to no frontend. If I log in through the main Blacksky frontend (Bluesky appview) one user I'm following shows only an error message. Via the Staging Blacksky frontend (atproto.africa), I can see I'm following him and see his posts. I'm SO curious about the edge cases. I assume if I boost him it's hidden from the Bluesky appview. What if I reply to him?

                  mcc@mastodon.socialM This user is from outside of this forum
                  mcc@mastodon.socialM This user is from outside of this forum
                  mcc@mastodon.social
                  wrote on last edited by
                  #292

                  Oh and I can't get staging.blacksky on my phone app. So imagine if you were using Mastodon, but you saw a slightly different list of posters, *and potentially a different set of your own posts*, depending on whether you were using your PC or your phone. This is great if there's a banned user you want to follow— you get an *option* to follow them. Mastodon.social can deny me the *option* to follow someone, on Fediverse. But except in that edge case this *might* not be a fantastic user experience!

                  mcc@mastodon.socialM 1 Reply Last reply
                  0
                  • coracinho@sunbeam.cityC coracinho@sunbeam.city

                    @mcc for us tech noobies in the audience, could you explain what does this mean?

                    mcc@mastodon.socialM This user is from outside of this forum
                    mcc@mastodon.socialM This user is from outside of this forum
                    mcc@mastodon.social
                    wrote on last edited by
                    #293

                    @coracinho Does this help? https://mastodon.social/@mcc/115918101156654032

                    1 Reply Last reply
                    0
                    • fabrice@fosstodon.orgF fabrice@fosstodon.org

                      @mcc When you are suspended by bluesky corp, is the ban at the app view or PDS level?

                      mcc@mastodon.socialM This user is from outside of this forum
                      mcc@mastodon.socialM This user is from outside of this forum
                      mcc@mastodon.social
                      wrote on last edited by
                      #294

                      @fabrice This is a VERY interesting question, as the answer appears to be "all of them". And when Link got banned, *that answer appeared to be surprising even to Bluesky employees*. The original messaging from Bluesky suggested you'd get banned only by the "labeler"— a third thing altogether. But there's obvious problems with that answer, and it's never what Bluesky implemented. After Link got banned Bluesky said they were reviewing this, but I don't think *changed* anything.

                      fabrice@fosstodon.orgF 1 Reply Last reply
                      0
                      • mcc@mastodon.socialM This user is from outside of this forum
                        mcc@mastodon.socialM This user is from outside of this forum
                        mcc@mastodon.social
                        wrote on last edited by
                        #295

                        @falken @coracinho Also the *way* in which Blacksky is making progress seems to me to make it look improbable any of the rest of us will reproduce what Blacksky has done. It's taken months of Rudy's time and he's had to purchase storage for "terabytes" of data because *standing up a new Blacksky "instance", in a total sense, requires literally mirroring everything posted on the network*, including spam and old inaccessible chats on people's https://stream.place streams

                        1 Reply Last reply
                        0
                        • mcc@mastodon.socialM mcc@mastodon.social

                          @fabrice This is a VERY interesting question, as the answer appears to be "all of them". And when Link got banned, *that answer appeared to be surprising even to Bluesky employees*. The original messaging from Bluesky suggested you'd get banned only by the "labeler"— a third thing altogether. But there's obvious problems with that answer, and it's never what Bluesky implemented. After Link got banned Bluesky said they were reviewing this, but I don't think *changed* anything.

                          fabrice@fosstodon.orgF This user is from outside of this forum
                          fabrice@fosstodon.orgF This user is from outside of this forum
                          fabrice@fosstodon.org
                          wrote on last edited by
                          #296

                          @mcc Because if you're banned only by the appview, this seems easy to bypass (just talk to the PDS!), but if you are banned at the PDS level that blocks you from also non-bsky ATProto apps, right? That all look bad to me; my conclusion is that we should own our PDSes (or use a Fediverse style community run one), and that appviews should not exist as centralized services.

                          1 Reply Last reply
                          0
                          • mcc@mastodon.socialM mcc@mastodon.social

                            Oh and I can't get staging.blacksky on my phone app. So imagine if you were using Mastodon, but you saw a slightly different list of posters, *and potentially a different set of your own posts*, depending on whether you were using your PC or your phone. This is great if there's a banned user you want to follow— you get an *option* to follow them. Mastodon.social can deny me the *option* to follow someone, on Fediverse. But except in that edge case this *might* not be a fantastic user experience!

                            mcc@mastodon.socialM This user is from outside of this forum
                            mcc@mastodon.socialM This user is from outside of this forum
                            mcc@mastodon.social
                            wrote on last edited by
                            #297

                            Oh, and let's consider, for a moment, the downsides of an individual user being able to "opt out" of moderation decisions. The problem with misbehavior on social media is force multipliers. One person harassing you is no problem; one person and their 3000 friends is a big problem. Imagine Bluesky and Blacksky ban user X but Trumpsky lets X keep posting. Now their 3000 friends— still in Bluesky's good graces— can see their posts calling to harass you, AND can zero-friction zip over to yell at you

                            ratsnakegames@mastodon.socialR mcc@mastodon.socialM 2 Replies Last reply
                            0
                            • mcc@mastodon.socialM mcc@mastodon.social

                              Oh, and let's consider, for a moment, the downsides of an individual user being able to "opt out" of moderation decisions. The problem with misbehavior on social media is force multipliers. One person harassing you is no problem; one person and their 3000 friends is a big problem. Imagine Bluesky and Blacksky ban user X but Trumpsky lets X keep posting. Now their 3000 friends— still in Bluesky's good graces— can see their posts calling to harass you, AND can zero-friction zip over to yell at you

                              ratsnakegames@mastodon.socialR This user is from outside of this forum
                              ratsnakegames@mastodon.socialR This user is from outside of this forum
                              ratsnakegames@mastodon.social
                              wrote on last edited by
                              #298

                              @mcc is

                              is Trumpsky a real thing

                              mcc@mastodon.socialM 1 Reply Last reply
                              0
                              • ratsnakegames@mastodon.socialR ratsnakegames@mastodon.social

                                @mcc is

                                is Trumpsky a real thing

                                mcc@mastodon.socialM This user is from outside of this forum
                                mcc@mastodon.socialM This user is from outside of this forum
                                mcc@mastodon.social
                                wrote on last edited by
                                #299

                                @ratsnakegames No

                                ratsnakegames@mastodon.socialR oblomov@sociale.networkO 2 Replies Last reply
                                0
                                • mcc@mastodon.socialM mcc@mastodon.social

                                  @ratsnakegames No

                                  ratsnakegames@mastodon.socialR This user is from outside of this forum
                                  ratsnakegames@mastodon.socialR This user is from outside of this forum
                                  ratsnakegames@mastodon.social
                                  wrote on last edited by
                                  #300

                                  @mcc phew, you had me worried for a second there was another one of Those Bloody Things

                                  megmac@social.treehouse.systemsM 1 Reply Last reply
                                  0
                                  • mcc@mastodon.socialM mcc@mastodon.social

                                    Oh, and let's consider, for a moment, the downsides of an individual user being able to "opt out" of moderation decisions. The problem with misbehavior on social media is force multipliers. One person harassing you is no problem; one person and their 3000 friends is a big problem. Imagine Bluesky and Blacksky ban user X but Trumpsky lets X keep posting. Now their 3000 friends— still in Bluesky's good graces— can see their posts calling to harass you, AND can zero-friction zip over to yell at you

                                    mcc@mastodon.socialM This user is from outside of this forum
                                    mcc@mastodon.socialM This user is from outside of this forum
                                    mcc@mastodon.social
                                    wrote on last edited by
                                    #301

                                    This is why—although, now Blacksky is letting me "see through" Bluesky's worst moderation decisions, I'm glad, because Bluesky's moderation is weird and arbitrary—I think it's a downside of the network, and Mastodon made the right decision not offering this feature. Fediverse defederation forces a degree of soft group consensus on moderation: it's possible to say "if you're talking to X, I don't want to talk to *you*". On Bluesky we are all ghosts walking through walls and this can't be enforced

                                    operand@todon.nlO pettter@social.accum.seP noisytoot@berkeley.edu.plN krazov@mstdn.socialK mcc@mastodon.socialM 5 Replies Last reply
                                    0
                                    • mcc@mastodon.socialM mcc@mastodon.social

                                      This is why—although, now Blacksky is letting me "see through" Bluesky's worst moderation decisions, I'm glad, because Bluesky's moderation is weird and arbitrary—I think it's a downside of the network, and Mastodon made the right decision not offering this feature. Fediverse defederation forces a degree of soft group consensus on moderation: it's possible to say "if you're talking to X, I don't want to talk to *you*". On Bluesky we are all ghosts walking through walls and this can't be enforced

                                      operand@todon.nlO This user is from outside of this forum
                                      operand@todon.nlO This user is from outside of this forum
                                      operand@todon.nl
                                      wrote on last edited by
                                      #302

                                      @mcc I guess you could simultaneously see this as a success and a failure for ATproto: decentralization is possible... but you immediately get a lot of the same problems ActivityPub has that ATProto ostensibly solved.

                                      mcc@mastodon.socialM 1 Reply Last reply
                                      0
                                      • ratsnakegames@mastodon.socialR ratsnakegames@mastodon.social

                                        @mcc phew, you had me worried for a second there was another one of Those Bloody Things

                                        megmac@social.treehouse.systemsM This user is from outside of this forum
                                        megmac@social.treehouse.systemsM This user is from outside of this forum
                                        megmac@social.treehouse.systems
                                        wrote on last edited by
                                        #303

                                        @ratsnakegames @mcc it's probably only a matter of time though. And as with fedi/AP, where this already did happen, how the network reacts and deals with it will be a real test of its philosophy.

                                        ratsnakegames@mastodon.socialR 1 Reply Last reply
                                        0
                                        • operand@todon.nlO operand@todon.nl

                                          @mcc I guess you could simultaneously see this as a success and a failure for ATproto: decentralization is possible... but you immediately get a lot of the same problems ActivityPub has that ATProto ostensibly solved.

                                          mcc@mastodon.socialM This user is from outside of this forum
                                          mcc@mastodon.socialM This user is from outside of this forum
                                          mcc@mastodon.social
                                          wrote on last edited by
                                          #304

                                          @operand However, they experience those problems in a *completely different way*, which not only is their userbase unprepared for, but the pre-existing experience of fediverse users does not exactly prepare for!

                                          1 Reply Last reply
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