Justyna Wojtczak

Founder I'm a #INTJ and #LCHF advocate, #ruby & #Rails, #AI & #LLM

[Polish eccDNA Research Team @eccdnapl]

A my na badania nad metodami diagnostycznymi nowotworów musimy zbierać na zrzutkach. W tym miesiącu udało nam się zebrać 450 zł, czyli jedną setną kwoty, jaką potrzebujemy na opłaty publikacyjne, o serwerach nie wspomnę.

https://t.co/0wgYhnVNga

[Justyna Wojtczak @justi84]

https://t.co/UwhuNokvC1 OpenSource console manager

[Justyna Wojtczak @justi84]

https://t.co/1YW3htJyrz

Single bash file. curl | bash. Zero LLM calls on hot path. Three hooks: UserPromptSubmit, PostCompact, SessionStart{clear}.

MIT. v0.2.0 just out.

[Justyna Wojtczak @justi84]

Long Claude Code sessions drift - agent forgets your ADRs, re-suggests approaches you already rejected.

Shipped context-revive v0.2.0: auto re-injects a deterministic project brief on cadence + after /compact + /clear.

Real demo↓

[Justyna Wojtczak @justi84]

Test on a long-running session today.

51 prompts in, ran /compact:
[15:25:23] post-compact signal written
[15:25:23] post-compact: forcing emit (counter=51)

Brief landed in the agent immediately, bypassing cadence. Same flow on /clear hours later.

[Justyna Wojtczak @justi84]

After /clear (full context wipe), asked the fresh agent: "what is this project?"

It answered with ADR 0025, ADR 0029, recent commit 61a691a, and the hard "success = DORMANT→ACTIVE, not MRR" constraint.

Full recall, prompt #1. That's the brief working.

[Justyna Wojtczak @justi84]

Just shipped ruby_llm-contract 0.8.0 - Contracts + Evals for RubyLLM. New thinking/reasoning_effort DSL, adapter unification via Chat#with_thinking, sharper narrative. https://t.co/TM2RaXWGgu

[Justyna Wojtczak @justi84]

Why pasting a directory tree into CLAUDE.md hurts:

You move one file → the tree is wrong → agent cites paths that don't exist.

Agent can `ls` itself. Paste what code WON'T tell it: ADR decisions, past incidents, "never X" rules.

[Justyna Wojtczak @justi84]

2026 AGENTS.md research was blunt on one thing: don't auto-generate architecture overviews or directory trees.

Evidence: reduces agent success by 0.5–2%, costs 20%+ more.

https://t.co/7HFTzasG20

So revive injects only what the agent can't grep out of the code itself.

[RubyKaigi @rubykaigi]

RubyKaigi 2027 #rubykaigi
🗓️ 14..16 Apr 2027
🥭 Miyazaki, Japan

[Justin Bowen @TonsOfFun111]

This is the talk I have been most excited for since @khasinski teased it to me at #RubyKaigi last year!

[Justyna Wojtczak @justi84]

ハックスペースに来ました！ #rubykaigi_hackspace

[Justyna Wojtczak @justi84]

Going to #rubykaigi2026 #tramtrip

[Chris Hasinski @khasinski]

@daily_mototsune I have a red RubyKaigi Game Boy with me, let's get a photo of both of those consoles together :D

[Justyna Wojtczak @justi84]

My laptop just told me I have 163 hours invested in a project I forgot existed. that's 163 hours of thinking. 163 hours of context. 163 hours I'll lose unless I reopen it.
Built armillary to scan my folders and tell me what's rotting. https://t.co/YmHmlsEytw

[Justyna Wojtczak @justi84]

ruby_llm-contract 0.6.0: define quality rules, get told which model to use.

Step.recommend(candidates: [...]) — evaluates model + reasoning_effort combos, picks cheapest that passes, builds your retry chain.

Data, not vibes.
https://t.co/ZG4VvrvtVz

[Justyna Wojtczak @justi84]

Project Boundary update: patched command substitution bypass + fixed quoted paths with spaces. No more sneaking past the guard. https://t.co/wJ2hxT9uRC

[Polish eccDNA Research Team @eccdnapl]

EccDNA miało historię trudną i poniekąd romantyczną. Zapraszam do przeczytania naszego artykułu, chętnie odpowiemy na wszystkie pytania!

https://t.co/qeergyotiV

[Justyna Wojtczak @justi84]

I joined Rubyist Bulk Reload 2026! https://t.co/lmGQKZZXUg #rubyist_bulk_load

[Justyna Wojtczak @justi84]

@ComplexiaSC Totally agree - the image part especially. Once a bad image gets into context, every message after that just errors out and the session is done. Ended up writing a hook that intercepts image reads before they can poison it. https://t.co/OJbT3dffgp

[Justyna Wojtczak @justi84]

Claude Code + images is still broken — crashes on transparency, large PNGs, and kills the whole session.

Last night I shipped a hook that proxies image reads through a Haiku subprocess. Zero image data touches your main context.

https://t.co/ocMZxptyoS