sequential-think

sequential-think is a skill for Claude Code, Codex from Dianel555/DSkills. It costs 110 tokens per session (1,385 once invoked), scanned A, original, MIT.

A command-line tool for structured reasoning through difficult technical problems. It records a sequence of thoughts, including revisions and alternative approaches, before reaching a conclusion.

In plain words
What is it for?
Use it for complex debugging, architecture decisions, system design, hypothesis testing, and investigations involving multiple components or performance bottlenecks.
Why use it?
It provides a repeatable way to examine competing explanations and validate a solution when a problem has several interacting parts.

Skill for Claude CodeCodex

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

Good fit Use it for complex debugging, architecture decisions, system design, hypothesis testing, and investigations involving multiple components or performance bottlenecks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dianel555/dskills/sequential-think
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 Dianel555/DSkills --skill sequential-think
Clone the repo
git clone --depth 1 https://github.com/Dianel555/DSkills

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin sequential-think — /plugin install sequential-think after adding the marketplace above.

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 sequential-think

README.md
[![agentmods](https://agentmods.dev/badge/skills/dianel555/dskills/sequential-think/github.svg)](https://agentmods.dev/skills/dianel555/dskills/sequential-think)
Your own site
<a href="https://agentmods.dev/skills/dianel555/dskills/sequential-think"><img src="https://agentmods.dev/badge/skills/dianel555/dskills/sequential-think/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 sequential-think

Your own site · 80×15
<a href="https://agentmods.dev/skills/dianel555/dskills/sequential-think"><img src="https://agentmods.dev/badge/skills/dianel555/dskills/sequential-think.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,385 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 175
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00110 $0.01385
Opus 5.5 $0.00044 $0.00554
Sonnet 5.5 $0.00022 $0.00277
Haiku 4.5 $0.00011 $0.00138

Measured 1mo ago against content hash c23214e8150c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sequential-think 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 1mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/sequential_think_cli.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/sequential-think/SKILL.md · 195 lines

How it starts

The opening of the file, as written. The whole thing — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sequential Think

Structured iterative thinking for complex problem-solving. Standalone CLI only (no MCP dependency).

Execution Methods

Run scripts/sequential_think_cli.py via Bash:

# Process a thought
python scripts/sequential_think_cli.py think \
  --thought "First, let me analyze the problem structure..." \
  --thought-number 1 \
  --total-thoughts 5

# Continue thinking chain
python scripts/sequential_think_cli.py think \
  --thought "Based on step 1, I hypothesize that..." \
  --thought-number 2 \
  --total-thoughts 5

# Revise a previous thought
python scripts/sequential_think_cli.py think \
  --thought "Reconsidering step 1, I realize..." \
  --thought-number 3 \
  --total-thoughts 5 \
  --is-revision \
  --revises-thought 1

# Branch into alternative path
python scripts/sequential_think_cli.py think \
  --thought "Alternative approach: what if we..." \
  --thought-number 4 \
  --total-thoughts 6 \
  --branch-from 2 \
  --branch-id "alt-approach"

# Final thought (complete chain)
python scripts/sequential_think_cli.py think \
  --thought "Conclusion: the solution is..." \
  --thought-number 5 \
  --total-thoughts 5 \
  --no-next

# View thought history
python scripts/sequential_think_cli.py history [--format json|text]

# Clear thought history
python scripts/sequential_think_cli.py clear

Core Principles

Iterative Thinking Process

  • Each tool call = one "thought" in the chain
  • Build upon, question, or revise previous thoughts
  • Express uncertainty when it exists

Dynamic Thought Count

  • Start with initial estimate of totalThoughts
  • Adjust up/down as understanding evolves
  • Add more thoughts even after reaching initial end

Hypothesis-Driven Approach

  1. Generate hypotheses as potential solutions emerge
  2. Verify hypotheses based on chain-of-thought steps
  3. Repeat until satisfied with solution

Completion Criteria

  • Only set nextThoughtNeeded: false when truly finished
  • Must have satisfactory, verified answer
  • Don't rush to conclusion

Read the full file on GitHub · 195 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 195 lines · 110 tokens per session scan A c23214e8150c

Subscribe to this mod's changes

sequential-think is a skill published in the GitHub repository Dianel555/DSkills (65 stars, last pushed 8d ago), licensed MIT. It adds 110 tokens to every session and 1,385 once invoked, about $0.0004 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 2026-08-30.

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