deepthink

deepthink is a skill for Claude Code, Codex from lacerbi/dotclaude. It costs 11 tokens per session (1,262 once invoked), scanned A, original, MIT.

A structured method for improving difficult answers through several rounds of independent analysis and review. It uses multiple reasoning passes and then combines their conclusions.

In plain words
What is it for?
Use it for complex problems that benefit from parallel viewpoints, iterative refinement, and a final synthesis of the strongest findings.
Why use it?
It reduces the chance that one initial line of reasoning misses an important detail or leaves disagreements unresolved.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/lacerbi/dotclaude/deepthink
Any agent
npx skills add lacerbi/dotclaude --skill deepthink
Clone the repo
git clone --depth 1 https://github.com/lacerbi/dotclaude

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 deepthink

README.md
[![agentmods](https://agentmods.dev/badge/skills/lacerbi/dotclaude/deepthink.svg)](https://agentmods.dev/skills/lacerbi/dotclaude/deepthink)
Your own site
<a href="https://agentmods.dev/skills/lacerbi/dotclaude/deepthink"><img src="https://agentmods.dev/badge/skills/lacerbi/dotclaude/deepthink.svg" alt="Measured on agentmods" height="20"></a>
Per session 11 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,262 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00011 $0.01262
Opus 5 $0.00005 $0.00631
Sonnet 5 $0.00002 $0.00252
Haiku 4.5 $0.00001 $0.00126

Measured 3d ago against content hash 4703e656a843, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

deepthink 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 3d 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.

skills/deepthink/SKILL.md · 138 lines

How it starts

The opening of the file, as written. The whole thing — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Problem

$ARGUMENTS

Configuration

Defaults: 5 agents for Cycle 1, 3 agents for subsequent cycles, 2–3 cycles (2 if early convergence, 3 if significant disagreement persists). Adjust if the user specifies (e.g., "use 10 agents", "do 4 rounds", "go deeper").

Your Task

Achieve higher-quality analysis through parallel independent reasoning with iterative refinement.

You (main agent) orchestrate and synthesize. Sub-agents analyze based on the context you provide.


Phase 0: Context Preparation

Before spawning any sub-agents, ensure you have sufficient context.

If you lack understanding of the problem domain, codebase, or relevant materials:

  • Explore the project structure
  • Read relevant files in full
  • Gather whatever context is needed to deeply understand the problem

If you already have sufficient context from the current conversation, proceed directly.

Critical: Sub-agents will only know what you tell them. They start cold with no access to your conversation history or accumulated understanding.


Spawning Sub-Agents: Context Requirements

When spawning each sub-agent, you must include in the prompt:

  1. Full problem statement with background and goals
  2. Relevant file contents (or key excerpts) that inform the analysis
  3. Key findings you've already established
  4. Specific constraints or requirements the user has mentioned
  5. The assigned lens for that agent's perspective

Do NOT assume sub-agents will figure out context from a thin prompt. Give them everything they need to reason well.


Sub-Agent Instructions

When spawning sub-agents, instruct them to:

  • Be extremely thorough—consider the problem deeply until fully satisfied with their analysis
  • Spend maximum effort; do not satisfice or stop at "good enough"
  • Start from the provided context, then explore further to deepen understanding, fill gaps, and verify assumptions
  • Only conclude when they have genuinely exhausted their reasoning on the problem
  • Produce: analysis, conclusion, confidence (high/medium/low), key assumptions made

Read the full file on GitHub · 138 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. 3d ago First seen · 138 lines · 11 tokens per session scan A 4703e656a843

Subscribe to this mod's changes

deepthink is a skill published in the GitHub repository lacerbi/dotclaude (2 stars, last pushed 4d ago), licensed MIT. It adds 11 tokens to every session and 1,262 once invoked, about $0.0001 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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