Borrowing it
Nothing to install: this file belongs to irahardianto/rugged-gemini. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/irahardianto/rugged-gemini/main/.gemini/skills/sequential-thinking/SKILL.mdgit clone --depth 1 https://github.com/irahardianto/rugged-geminiWrote 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.
[](https://agentmods.dev/skills/irahardianto/rugged-gemini/sequential-thinking)<a href="https://agentmods.dev/skills/irahardianto/rugged-gemini/sequential-thinking"><img src="https://agentmods.dev/badge/skills/irahardianto/rugged-gemini/sequential-thinking/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.
<a href="https://agentmods.dev/skills/irahardianto/rugged-gemini/sequential-thinking"><img src="https://agentmods.dev/badge/skills/irahardianto/rugged-gemini/sequential-thinking.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00037 | $0.00562 |
| Opus 5.5 | $0.00015 | $0.00225 |
| Sonnet 5.5 | $0.00007 | $0.00112 |
| Haiku 4.5 | $0.00004 | $0.00056 |
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 1mo 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 — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sequential Thinking
Structured approach: breaks complex problems into iterative thought steps with revision and course correction.
When to Use
- Complex problems → manageable steps
- Planning requiring iterative refinement
- Analysis needing mid-stream correction
- Scope emerges during analysis
- Multi-step solutions needing cross-step context
- Hypothesis generation + verification
Methodology
- Initial estimation — estimate thoughts needed, stay flexible
- Iterative analysis — work sequentially, build context
- Revision — question/revise previous thoughts as understanding deepens
- Branch exploration — explore alternatives when needed
- Hypothesis cycle — generate, verify against chain, repeat
- Convergence — continue until satisfactory solution
Thought Structure
Each thought includes:
thought: current step contentthoughtNumber: position (1, 2, 3...)totalThoughts: estimate (adjustable)nextThoughtNeeded: boolean
Optional: isRevision, revisesThought, branchFromThought, branchId, needsMoreThoughts.
Process
Starting: estimate, begin thought 1 (context + approach), conservative totalThoughts.
During: build on previous, filter irrelevant info, express uncertainty, revise freely, adjust totalThoughts.
Revision:
{
"thought": "On reflection, thought 3's assumption about X was incorrect because Y...",
"thoughtNumber": 6,
"totalThoughts": 10,
"isRevision": true,
"revisesThought": 3,
"nextThoughtNeeded": true
}
Hypothesis cycle: generate → verify against chain → fails? revise/branch → repeat until validated.
Completion: nextThoughtNeeded: false only when satisfied. Single clear answer addressing original problem.
Context Management
- Reference previous thoughts by number
- Track valid vs revised thoughts
- Ignore irrelevant details per step
- Complex thought → break into multiple, increase totalThoughts
Output Format
Thought [N/Total]: [content]
[If revision: "Revises thought X because..."]
[If branch: "Branching from thought X to explore..."]
Solution: [Clear, direct answer]
What ships with it
1 file 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.
- 1mo ago First seen · 85 lines · 37 tokens per session scan A 45a387ac531a
sequential-thinking is a skill published in the GitHub repository irahardianto/rugged-gemini (5 stars, last pushed 5mo ago), licensed MIT. It adds 37 tokens to every session and 562 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 2026-09-03.
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