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Epiktistes is my home in the Fediverse. It is an instance of Ktistec, a single-user ActivityPub server like Mastodon, but with fewer users and fewer commits. Here's my introduction (last updated early-2025).
I wrote a series of posts about optimizing the performance of the Ktistec server, its build time, and its executable size: part 1, part 2, part 3, part 4, and part 5.
Some things I regularly write about, organized by hashtag:
I also wrote some #pointfreeverse.
Time flies! It's already 5 years since the release of Crystal 1.0.
We're going to celebrate that! Meet the Core Team and community members looking back at that milestone, what happened since then, and what's coming next.
You can tag your questions with #Crystal2026AMA
Friday, 27 March 2026 16:00 UTC
Video Call: https://man.as/crystal2026ama-zoom
Live Stream: https://man.as/crystal2026ama
More info: https://forum.crystal-lang.org/t/5-years-anniversary-of-crystal-1-0/8801
Release v3.3.4 of Ktistec is available.
This release adds Mastodon-compatible client support for publishing posts. Just like the previous release, however, all Mastodon API support is behind a build flag (-Dwith_mastodon_api). It's still experimental, so opt in only if you're happy to work with rough edges.
Beyond that, I focused on cleanup and refactoring throughout the codebase. Here's the full changelog:
Added
/api/v1/statuses endpoint for status posting./api/v1/timelines/public endpoint.Fixed
Changed
npm audit, test, and caching.npm ci in Dockerfile for reproducible builds.🏋️ Mastodon API support is coming along—more in the next release!
test post from tusker via Mastodon-compatible API… #ktistec
@reiver i installed vibefed. to shrink context usage at the top level, i put everything into one of three groups of skills: fediverse-detection, fediverse-protocols, or fediverse-platforms. the top level skill, in each case, is an index that links to the individual documents. starting with JSON-LD, i'm scrutinizing ktistec's implementation of core technology against your best practices.
after a long detour away from functional programming, i've swerved back and i'm studying lean.
is it the expectation that atomic should be used for all class level variables now?
I have a workflow where I “move” (cherry pick) commits from an R&D branch to the main branch and then rebase the original branch on top of main. Today I learned that this works even if the moved commits are still present on the original branch. Git detects their presence in the history and doesn’t try to add them a second time, which is what I was afraid would happen!
I have started work on a Mastodon-compatible API layer intended to support the many Mastodon front-ends available. It is incomplete and requires an explicit build flag to enable, but what's there (the main timeline) already works with the official Mastodon app, Tusky, and Phanpy.
Here's the full changelog:
Fixed
Changed
As always, check out the full diff for the complete details.
This small release focused on two big deliverables: support for the latest version of Crystal and fixes for a few delivery issues.
Previous releases supported a wide range of Crystal Language versions, but ran into problems with version 1.17.x and beyond due to breaking changes in the standard library. This release works on 1.19.1 but also requires at least 1.19.1.
This release also fixes a bug, present since mid-2020 when HTTP signatures were first added, that resulted in signatures some fediverse servers wouldn't accept. Mastodon did, but with the proliferation of new ActivityPub servers, I increasingly encountered servers that did not.
Here's the full changelog:
Fixed
keyId now includes #main-key fragment.Changed
It's always good to stay up-to-date on releases. But if your platform doesn't yet support 1.19.1, I've also released a parallel branch that still runs on 1.16.3 and earlier. I'll maintain that branch for the next few releases to give everyone time to upgrade.