kostra

kostra is a command for Claude Code from josefslerka/study-kit. It costs 25 tokens per session (208 once invoked), scanned A, original, MIT.

A command for planning the argument and structure of an academic paper. It compares five ways to organize reasoning and defines what each paper section must achieve.

In plain words
What is it for?
Use it to choose an argument strategy, design sections 5–7, set evidence and length requirements, test the outline, and prepare an introduction.
Why use it?
It helps prevent sections from becoming disconnected or repetitive, and checks whether the paper's logic depends on the chosen structure.

Command for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md.

Good fit Use it to choose an argument strategy, design sections 5–7, set evidence and length requirements, test the outline, and prepare an introduction.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/josefslerka/study-kit/kostra
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/josefslerka/study-kit

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for kostra

README.md
[![agentmods](https://agentmods.dev/badge/commands/josefslerka/study-kit/kostra/github.svg)](https://agentmods.dev/commands/josefslerka/study-kit/kostra)
Your own site
<a href="https://agentmods.dev/commands/josefslerka/study-kit/kostra"><img src="https://agentmods.dev/badge/commands/josefslerka/study-kit/kostra/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for kostra

Your own site · 80×15
<a href="https://agentmods.dev/commands/josefslerka/study-kit/kostra"><img src="https://agentmods.dev/badge/commands/josefslerka/study-kit/kostra.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 208 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00025 $0.00208
Opus 5.5 $0.00010 $0.00083
Sonnet 5.5 $0.00005 $0.00042
Haiku 4.5 $0.00003 $0.00021

Measured 2mo ago against content hash f84b2de0ba27, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

kostra scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

cs/.claude/commands/kostra.md · 13 lines

What it actually says

Proveď fázi 2.1 + 2.2 dle CLAUDE.md.

Posuď 5 strategií (kumulativní/dialektická/detektivní/vrstvená/komparativní), doporuč podle teze a časopisu — volbu nech na člověku. Pak pro každou sekci (5–7) definuj funkci, vstupní podmínku, výstupní stav, typ evidence a délku (% celku).

GATE (test kostry): odeberu sekci → zhroutí se argument? prohodím dvě → změní se logika? je poslední sekce víc než zopakování teze? Po průchodu zapiš process/kostra.md, zaloguj a navrhni /uvod.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 13 lines · 25 tokens per session scan A f84b2de0ba27

Subscribe to this mod's changes

kostra is a command published in the GitHub repository josefslerka/study-kit (7 stars, last pushed 4mo ago), licensed MIT. It adds 25 tokens to every session and 208 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

kostra compared with commands from other repositories

kostra next to 6 commands from other repositories
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