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 skills add oborchers/fractional-cto --skill structured-brainstorminggit clone --depth 1 https://github.com/oborchers/fractional-ctoWrote 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/oborchers/fractional-cto/structured-brainstorming)<a href="https://agentmods.dev/skills/oborchers/fractional-cto/structured-brainstorming"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/structured-brainstorming/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/oborchers/fractional-cto/structured-brainstorming"><img src="https://agentmods.dev/badge/skills/oborchers/fractional-cto/structured-brainstorming.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 | $0.00124 | $0.01624 |
| Opus 5.5 | $0.00050 | $0.00650 |
| Sonnet 5.5 | $0.00025 | $0.00325 |
| Haiku 4.5 | $0.00012 | $0.00162 |
Grade A, and why
structured-brainstorming 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 5d 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 — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Structured Brainstorming
Structured brainstorming applies specific thinking methods that counteract LLM reasoning biases during problem exploration. Without deliberate structure, LLM responses gravitate toward the most probable answer, skip genuine alternative exploration, and converge prematurely on conventional solutions.
This skill provides 8 methods selected because they fight known LLM failure modes. The /structured-brainstorming:brainstorm command drives an interactive flow where the user decides when to dispatch parallel brainstorm-explorer subagents for deep multi-angle exploration.
Why Structure Matters for LLMs
LLMs have specific reasoning biases that structured methods counteract:
| Bias | What Happens | Counteracting Method |
|---|---|---|
| Premature convergence | Jumps to "the answer" without exploring alternatives | Diverge-then-Converge |
| Sycophancy | Leans toward what the user seems to want | Inversion / Pre-Mortem |
| Mode collapse | "Different" ideas are variations of the same idea | Constraint Manipulation |
| Shallow exploration | Stays in the obvious solution neighborhood | First Principles Decomposition |
| Authority bias | Defaults to best practices / conventional wisdom | Assumption Surfacing |
| Single perspective | Thinks only as "helpful assistant" | Perspective Forcing |
| Local search | Explores only adjacent solutions | Analogy Search |
| Vague decomposition | Breaks problems into overlapping, incomplete parts | MECE Decomposition |
The 8 Methods
| # | Method | Core Question | Best For |
|---|---|---|---|
| 1 | First Principles Decomposition | "What is actually true here vs. assumed?" | Challenging conventional approaches |
| 2 | Inversion / Pre-Mortem | "What would make this fail spectacularly?" | Risk assessment, robustness |
| 3 | Constraint Manipulation | "What if I add/remove/reverse a constraint?" | Breaking out of local optima |
| 4 | Perspective Forcing | "How does the [user/operator/critic/...] see this?" | Blind spot detection |
| 5 | Analogy Search | "Where has a similar problem been solved?" | Novel approaches from other domains |
| 6 | MECE Decomposition | "What are the non-overlapping parts of this?" | Systematic coverage |
| 7 | Assumption Surfacing | "What am I taking for granted?" | Hidden constraint discovery |
| 8 | Diverge-then-Converge | "How many distinct options exist before I evaluate?" | Overcoming premature convergence |
What ships with it
10 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.
- examples/inline-brainstorm.md 5.4 KB
- examples/parallel-agent-exploration.md 11 KB
- references/analogy-search.md 4.3 KB
- references/assumption-surfacing.md 4.2 KB
- references/constraint-manipulation.md 3.3 KB
- references/diverge-then-converge.md 4.4 KB
- references/first-principles-decomposition.md 2.7 KB
- references/inversion-and-pre-mortem.md 3.2 KB
- references/mece-decomposition.md 3.9 KB
- references/perspective-forcing.md 4.0 KB
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.
- 5d ago First seen · 106 lines · 124 tokens per session scan A a525f95cab46
structured-brainstorming is a skill published in the GitHub repository oborchers/fractional-cto (32 stars, last pushed 5d ago), licensed MIT. It adds 124 tokens to every session and 1,624 once invoked, about $0.0005 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 2026-10-13.
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