reasoning

reasoning is a skill for Claude Code, Codex from hajekim/agentic-design-patterns-skills. It costs 414 tokens per session (3,880 once invoked), scanned A, original, MIT.

A collection of structured techniques for thinking through difficult tasks before acting.

In plain words
What is it for?
Use it for complex coding, mathematical, analytical, or decision-making tasks where accuracy and explainable results matter.
Why use it?
It helps agents break down problems, compare options, verify conclusions, and correct mistakes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for complex coding, mathematical, analytical, or decision-making tasks where accuracy and explainable results matter.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hajekim/agentic-design-patterns-skills/reasoning
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.

Any agent
npx skills add hajekim/agentic-design-patterns-skills --skill reasoning
Clone the repo
git clone --depth 1 https://github.com/hajekim/agentic-design-patterns-skills

Made for: Claude Code, Codex.

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 reasoning

README.md
[![agentmods](https://agentmods.dev/badge/skills/hajekim/agentic-design-patterns-skills/reasoning/github.svg)](https://agentmods.dev/skills/hajekim/agentic-design-patterns-skills/reasoning)
Your own site
<a href="https://agentmods.dev/skills/hajekim/agentic-design-patterns-skills/reasoning"><img src="https://agentmods.dev/badge/skills/hajekim/agentic-design-patterns-skills/reasoning/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 reasoning

Your own site · 80×15
<a href="https://agentmods.dev/skills/hajekim/agentic-design-patterns-skills/reasoning"><img src="https://agentmods.dev/badge/skills/hajekim/agentic-design-patterns-skills/reasoning.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 414 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,880 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 $0.00414 $0.03880
Opus 5 $0.00207 $0.01940
Sonnet 5 $0.00083 $0.00776
Haiku 4.5 $0.00041 $0.00388

Measured 9d ago against content hash 922c62d17d33, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

reasoning 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 9d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • reasoning — 100% identical, 3 lines differ
skills/reasoning/SKILL.md · 445 lines

How it starts

The opening of the file, as written. The whole thing — 445 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Reasoning Techniques Pattern

Overview

The Reasoning Techniques Pattern equips agents with structured approaches to thinking through problems before acting. Rather than jumping directly from input to output, reasoning-enhanced agents explicitly decompose problems, explore possibilities, verify their work, and reflect on their reasoning process — dramatically improving accuracy on complex tasks.

Core Principle: Slow down to speed up accuracy — structured thinking catches errors that fast pattern-matching misses.

When This Skill Applies

Activate this pattern when:

  • Multi-step problems require logical deduction or causal reasoning
  • Mathematical, coding, or analytical tasks require precise computation
  • The agent must justify its conclusions (auditable decisions)
  • Complex questions benefit from exploring multiple solution paths
  • Self-consistency across multiple reasoning attempts is needed
  • The agent must detect and correct its own errors before responding

Rule of thumb: If a human expert would "show their work" — the agent should too. Use reasoning techniques whenever accuracy matters more than speed.

Key Reasoning Techniques

1. Chain-of-Thought (CoT)

Break reasoning into explicit intermediate steps:

Problem → Step 1 → Step 2 → ... → Step N → Answer

2. ReAct (Reason + Act)

Interleave reasoning with tool use:

Thought → Action (tool call) → Observation → Thought → Action → ... → Answer

3. Tree of Thought (ToT)

Explore multiple reasoning branches and select the best:

Problem → Branch A → Branch B → Branch C
                    ↓ (evaluate each)
              Select Best Path → Answer

4. Self-Consistency

Generate multiple independent solutions, pick the majority answer:

Problem → Solution 1 → Answer A
        → Solution 2 → Answer A (consensus)
        → Solution 3 → Answer B

5. Self-Critique (Reflexion)

Agent critiques its own output and corrects it:

Problem → Initial Answer → Critique → Revised Answer → Critique → Final Answer

Read the full file on GitHub · 445 lines

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. 9d ago First seen · 445 lines · 414 tokens per session scan A 922c62d17d33

Subscribe to this mod's changes

reasoning is a skill published in the GitHub repository hajekim/agentic-design-patterns-skills (4 stars, last pushed 5mo ago), licensed MIT. It adds 414 tokens to every session and 3,880 once invoked, about $0.0021 per session on Opus 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.

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