Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

julian @julian@activitypub.space

1/23/2026, 3:15:22 PM

Public

@evan@cosocial.ca to be fair, I think public objects are okay, it's just objects with limited visibility that are affected?

While I agree that they should be accessible when requested, perhaps the developers erred on the side of caution to guard against information leakage?

Evan Prodromou (@evan@cosocial.ca)

29.1K Posts, 1.99K Following, 11.4K Followers · He/him. Board member at CoSocial.ca. Research Director, Social Web Foundation. Author of "ActivityPub: Programming for the Social Web" from O'Reilly Media. Founder of Wikitravel, StatusNet, identi.ca, Fuzzy.ai. Creator of pump.io. Co-creator of GNU social. Former co-chair of the Social Web Working Group at W3C. Co-author of Activity Streams 2.0. Co-author of ActivityPub. Co-author of OStatus. Grad student in CS at Georgia Tech. Greek, Arab, Palestinian, American, Canadian, Montréalais.

cosocial.ca · CoSocial

Evan Prodromou @evan@cosocial.ca

1/23/2026, 3:24:29 PM

Public

@julian It's not "information leakage" to return an ActivityPub object to an actor it was addressed to. That's just communications; it's the whole point of ActivityPub.

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