Veska - LLM Structured Output Engineer AI Skill
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Veska - LLM Structured Output Engineer AI Skill
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// skill previewveska-structured-output-constrained-decoding-engineer.md
# Veska - Structured Output & Constrained Decoding Engineer
## Who Veska Is
Drop Veska into Claude and get a Senior Structured Output & Constrained
Decoding Engineer who holds a position most teams learn the hard way:
guaranteed valid JSON is not the same thing as correct JSON, and optimizing
for the first while ignoring the second is how you ship a pipeline with a
100 percent parse rate and a 71 percent accuracy rate. Constrained decoding
forces the sampler to stay inside a grammar, which eliminates syntax errors
completely and does nothing whatsoever about semantics. Worse, a badly shaped
schema actively degrades reasoning: force every field to be required and the
model fabricates values rather than omitting them, put the answer field before
the reasoning field and you have removed the model's ability to think before
committing, use a 300-value enum and you have spent the model's attention on
token-level bookkeeping. Veska designs the schema as a reasoning scaffold
first and a data contract second, then picks the enforcement mechanism that
Preview: lines 23 to 30 of 276 · Full file after purchase
or included in Unlimited Access
Use the name
Once the file is loaded, talk to it by name: “Serge, check this page.” That is what the name is for. It also keeps several skills apart in one chat.
Once the file is loaded, talk to it by name: “Serge, check this page.” That is what the name is for. It also keeps several skills apart in one chat.
// the skill your AI runs on
You are Veska, a Senior Structured Output and Constrained Decoding Engineer who classifies the failures first, puts the reasoning field ahead of the answer, and reports conformance alongside accuracy. You have been activated to make model responses parse correctly.
$4.92/mo, billed yearly. Works in Claude, ChatGPT, Claude Code, Codex and Cursor. Cancel anytime, 14-day refund on the first charge. After checkout we email your setup link.
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Ask Veska something hard.
Roughly 8% of our model responses fail to parse and retries are eating our budget. Make the output reliable.
CLAUDE · AS VESKA, LLM STRUCTURED OUTPUT ENGINEER
Veska returns a parse-failure taxonomy from real logs, a redesigned schema with before and after validity rates, a constrained-decoding configuration, a validation and repair layer that distinguishes recoverable from fatal, a demonstration of an enum size that made accuracy worse, and a schema-versioning plan for downstream consumers.
Or have every skill inside your AI.
Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com
// what's inside
What's inside this skill
- JSON Schema and grammar design the model can satisfy
- Constrained and grammar-guided decoding
- Validation, repair layers and safe streaming partials
- Where large enums and deep nesting destroy accuracy
Teams whose pipeline breaks on malformed JSON and whose fix so far has been more retries.
What you're actually buying
Drop Veska into Claude and get an engineer who makes model output parse every single time, without pretending a retry loop is a design.
Veska owns getting reliable structured output out of a language model: JSON Schema and grammar design that the model can satisfy, constrained decoding and grammar-guided generation, tool-call and function-response schema shaping, validation and repair layers, the accuracy cost of huge enums and deeply nested schemas, streaming partial structures safely, schema versioning against downstream consumers, and knowing when a schema is fighting the model rather than guiding it.
What you get
- →JSON Schema and grammar design the model can satisfy
- →Constrained and grammar-guided decoding
- →Validation, repair layers and safe streaming partials
- →Where large enums and deep nesting destroy accuracy
📄 veska-structured-output-constrained-decoding-engineer.skill
Under 2 min install
Works with Claude, ChatGPT & any AI chat
How to install
Download the .skill package, open Claude, paste SKILL.md into your Project Instructions or system prompt, describe your requirement, and Veska builds the answer. Includes a full worked example so you see exactly what you get.
// how to install
Under 2 minutes
Four steps. Any AI chat.
- 01Download the file
After checkout, the download link lands in your inbox. Save the file anywhere on your device.
- 02Open your AI chat
Claude, ChatGPT, Gemini, Grok, or Copilot - whichever one you already use.
- 03Paste the file contents
Drop it into the system prompt, Project instructions, or custom instructions field.
- 04Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.
No technical knowledge required.
With Unlimited there is nothing to download. Connect your AI once, then just ask: "Load Veska from KissMySkills."
// faq
Questions about this product
What does the Veska skill do?+
Make output parse every time: schema design, constrained decoding, validation and repair, and streaming partials. Load it once into Claude Projects and you get a configured Structured Output & Constrained Decoding Engineer without re-explaining context at the start of every session. Validate changes against a held-out eval set and real production traces before rolling out to all traffic.
How do I install this skill file?+
Download the .skill package (it contains SKILL.md), paste the contents into Claude Projects Instructions or your AI's system prompt, add your own context and start your first session. Works with Claude, ChatGPT, or any AI chat that accepts system prompts.
Which AI tools does this skill work with?+
Works with Claude (recommended), ChatGPT, Gemini, Perplexity and Copilot, and any AI chat that accepts system prompts. Claude Projects gives the best results.
What is included in this download?+
One .skill package delivered instantly after purchase: the full SKILL.md role configuration plus a worked-example file with a real scenario so you see the quality before you rely on it. Pay once, keep forever, yours permanently.
How is this different from using Claude without the Veska skill?+
Without a skill file your AI starts every session as a general assistant. With Veska loaded it applies Structured Output & Constrained Decoding Engineer methodology from the first message, with consistent quality every time. Validate changes against a held-out eval set and real production traces before rolling out to all traffic.
Do I have to read it myself?+
No. The file is written for your AI to read, not for you. Upload it or paste it in once and the AI takes on the role. After that you just ask it questions the way you normally would. You're welcome to open it and read it, but nothing here depends on you doing that.