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.
npx agentmods add skills/thedotmack/sequential-thinking-skill/sequential-thinkingnpx skills add thedotmack/sequential-thinking-skill --skill sequential-thinkinggit clone --depth 1 https://github.com/thedotmack/sequential-thinking-skillWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00152 | $0.01487 |
| Opus 5 | $0.00076 | $0.00744 |
| Sonnet 5 | $0.00030 | $0.00297 |
| Haiku 4.5 | $0.00015 | $0.00149 |
Grade A, and why
sequential-thinking 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sequential Thinking
A tool for dynamic, reflective problem-solving through a chain of numbered thoughts. Full parity with the Sequential Thinking MCP server — same parameters, same state management, same behavioral contract.
How to Use This Skill
When this skill is activated, use scripts/think.ts as your primary reasoning mechanism. Do not reason in prose — reason through the script. Every step of your analysis should be a thought submitted via the script, making your reasoning chain explicit and trackable.
Workflow
- Reset state at the start of every new thinking session
- Loop: Submit thoughts one at a time via the script, incrementing
thoughtNumbereach time - Adapt: Revise earlier thoughts, branch into alternatives, or extend depth as needed
- Terminate: Set
nextThoughtNeeded falseonly when you have a confident final answer - Respond: After the final thought, provide the answer to the user
Each thought should be a single Bash tool call. Think in the thought, not outside it.
Script Location
scripts/think.ts
Run via bun from the skill's base directory.
Commands
Reset (required before every new session)
bun scripts/think.ts --reset
Submit a Thought
Required flags: --thought, --thoughtNumber, --totalThoughts, --nextThoughtNeeded
bun scripts/think.ts \
--thought "Your analysis for this step" \
--thoughtNumber 1 \
--totalThoughts 5 \
--nextThoughtNeeded true
Submit a Revision
Revises a previous thought. The original stays in history; the revision is appended as a new entry. Requires --isRevision and --revisesThought.
bun scripts/think.ts \
--thought "Corrected analysis" \
--thoughtNumber 3 \
--totalThoughts 5 \
--nextThoughtNeeded true \
--isRevision --revisesThought 1
Submit a Branch
Explores an alternative path from a prior thought. Requires both --branchFromThought and --branchId.
bun scripts/think.ts \
--thought "Alternative approach" \
--thoughtNumber 4 \
--totalThoughts 7 \
--nextThoughtNeeded true \
--branchFromThought 2 --branchId alt-approach
What ships with it
2 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.
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.
- 2d ago First seen · 152 lines · 152 tokens per session scan A 72bd15c72de3
sequential-thinking is a skill published in the GitHub repository thedotmack/sequential-thinking-skill (38 stars, last pushed 6mo ago), licensed MIT. It adds 152 tokens to every session and 1,487 once invoked, about $0.0008 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 2026-08-30.
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