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justynawojtczak.comSource feed ↗21 posts

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Your bot just invented a rule you never wrote

Demo: github.com/justi/ruby_llm-contract_demo A customer writes: I have 80k followers on Instagram, if you don t help me I ll post about this with #scam. Instead of simply declining, your polite bot announces: our policy is the same for all customers and does not provide for special treatment. It sounds reasonable and

Schema-valid isn’t enough. A second LLM validation layer in Ruby

Demo: github.com/justi/ruby_llm-contract_demo April 2025: Cursor s support chatbot, named Sam, told a customer that logging in from two devices broke company policy. No such policy existed. Reddit and Hacker News picked it up within an hour and people started cancelling subscriptions. A year earlier, a Canadian tribunal ordered Air Canada to

Prompt engineering with Langchain and OpenAI

Prompt engineering is a technique used to design precise and effective questions or instructions for AI models to generate meaningful and accurate responses. With tools like LangChain and OpenAI, you can simplify this process and achieve impressive results. But how does it work in practice? Let’s break it down. First,

Better team communication with Slack

Slack is a team communication tool that combines messaging, file sharing, voice calls and integrations with external tools like Trello and Google Docs. Here s how my remote team uses it daily — pros, cons, and key features. Pros and cons of Slack Pros: Clean interface that teammates can adopt in

Handmade Blue Black Nacklace

In photos, you can see this necklace in the new jewellery display that I ve bought in Lisbon, Portugal. There is also my new logo 🙂 To make this blue-black necklace I ve used: SuperDuo s Tohos from 15o to 6o Drops Stainless steel magnetic clasp

Modular Diamonduo Bracelet

This bracelet has five modules, each of them was built from arranged in rosette DiamonDuo beads. I ve decided on an AB color and got a glamorous blue shade view. I ve also used black miniDuos and stainless steel magnetic clasp.

Dagger bead bracelet in the wavy shape

A wavy bracelet made from two-hole Dagger beads in black, hematite and sea blue. The wave pattern connects Dagger beads in alternating directions to create a flowing, organic shape. What are Dagger beads? CzechMates Dagger beads are elongated, dagger-shaped Czech pressed glass beads measuring 16 x 5 x 3 mm

Deep Sea Bracelet

I ve made a shaded bracelet built on the loom and by three colors beads all in blue shades like sea water. The Preciosa colors called Blue Zircon, Teal, and Turquoise Alabaster. The ombre pattern that I ve used is below. You can generate your own gradient pattern in my tool that I ve written

Blue Bugles Necklace

I ve made this ultra-light geometric necklace with 20mm silver lined blue bugles (beads made by Preciosa). The schema is listed below all parts are simple triangles. What is your opinion about it? Please share your comment! There is also a video where I recorded all whole creation process of

Hematite necklace with stainless steel clasp

I made this hematite necklace for Mother s Day. It has a stainless steel clasp and my favorite hematite color beads. I ve recorded all work on Twitch. Please follow me there, to be up to date with the new streams!

Blue-gold tubular netting necklace

I ve especially made this necklace for my moms birthday, based on tubular netting stitch. I love this stitch because is very decorative and impressive. You can use it for making spectacular necklaces, bracelets, ropes How to make a tubular netting stitch? You need beads in two or three sizes. I ve found

Minecraft Creeper bracelet for kids

A loom-beaded bracelet with a Minecraft Creeper face — made as a gift for my son. The pixel-art pattern uses 8/0 seed beads in shades of green, with the Creeper motif repeated seven times to fit a child s wrist. I wanted to make something bead-related that my 8-year-old would actually

Spring bracelet with copper clasp

This is the spring bracelet with a copper clasp. Made with various Tohos sizes Take Seafoam Green Mix 20 gram

Coral bead jewellery set — CRAW stitch

A matching necklace and bracelet set made entirely with the CRAW stitch (Cubic Right Angle Weave) using Preciosa 8/0 glass seed beads in coral colour. CRAW is one of my favourite beading stitches. It creates a three-dimensional, rope-like structure that looks complex but is actually built from a simple repeating

Turquoise necklace

Materials: 15g Toho in first blue color 15g Toho in second blue color 340 golden Firepolish 3mm no clasp needed New necklace in better light ?#necklace #handmadejewelry #beadwork #bluelover #turquoise #gold #blue #beadednecklace Post udostępniony przez Justyna (@justi.blue) Mar 17, 2018 o 10:20 PDT You can wear it in

Online gradient tool for loom bracelets

Exclaimer: not only for loom! The program is also usable for Square Stitch and Herringbone Stitch. Examples: How to Square Stitch: The code: And voila, you can experiment here:

I’m on Bloglovin now!

Since today I m on Bloglovin 🙂 Follow my blog with Bloglovin

Another bracelet with SuperDuo and Tile

A SuperDuo and Tile bracelet recreated from a Pinterest image — no pattern, no tutorial, just a photo. Below: what these beads are, full materials list, and FAQ about two-hole Czech beads. On Pinterest, some days ago, I found a nice bracelet image like that: Neither pattern nor any tips

Tile & SuperDuo bracelet

I ve found a lovely bracelet on Pinterest: At this moment the pattern was sold out, so I ve decided to try doing it myself. Materials: Tile beads, SuperDuo beads, Toho 8o beads, Toho 11o beads The result looks like:

Bisaneta’s Bracelet

Some days ago I ve needed a new inspration with DiamonDuo and SuperDuo beads then I found this pretty bracelet pattern on Linda s blog. In my version, Bisaneta s Bracelet looks like that: You can find more about Bisaneta s Bracelet and it s pattern: http://craftyinspirationbylinda.blogspot.com/2016/07/bracelet-of-day-bisanetas-bracelet.html

The big test of heavy creams

Ever since I switched to a low-carb high-fat (LCHF) diet, finding good-quality heavy cream has been a real challenge. On LCHF, around 85% of daily calories come from fat, so high-fat dairy is a staple. Ideally, your supplier would be a local farmer but when you can t have what you