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/nickcrew/claude-cortex/assumption_busternpx skills add NickCrew/Claude-Cortex --skill assumption_bustergit clone --depth 1 https://github.com/NickCrew/Claude-CortexWrote 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/nickcrew/claude-cortex/assumption_buster)<a href="https://agentmods.dev/skills/nickcrew/claude-cortex/assumption_buster"><img src="https://agentmods.dev/badge/skills/nickcrew/claude-cortex/assumption_buster.svg" alt="Measured on agentmods" 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 | $0.00019 | $0.00340 |
| Opus 5 | $0.00010 | $0.00170 |
| Sonnet 5 | $0.00004 | $0.00068 |
| Haiku 4.5 | $0.00002 | $0.00034 |
Grade A, and why
assumption-buster 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 yesterday.
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.
What it actually says
/collaboration:assumption-buster
Use when the team feels boxed in or every idea sounds the same.
Inputs
- Topic or problem statement
- Known assumptions/constraints (even if informal)
- Optional mode flag:
--opposite,--zero, or--10x
Steps
- List core assumptions (facts, beliefs, constraints).
- Transform each via chosen operator (opposite/zero/10x).
- Generate 1–2 reframed ideas per transformed assumption.
- Capture evidence to collect and a fast test for each idea.
- Pick the most promising 2–3 and move to
/ctx:planor Tasks.
Output Template
### Assumptions
### Transforms (opposite/zero/10x)
### Reframed Ideas
- Idea … (evidence, fast test)
### Top Picks
Pairings
- Run before
/collaboration:idea-labif you need to loosen constraints. - Feed winners into
/collaboration:concept-forgeto score/prioritize.
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.
- yesterday First seen · 49 lines · 19 tokens per session scan A 13281db556a5
assumption-buster is a skill published in the GitHub repository NickCrew/Claude-Cortex (37 stars, last pushed 2mo ago), licensed MIT. It adds 19 tokens to every session and 340 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 2026-09-03.
Other skills, from other repositories
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cad-land
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cad-verifier-contract
Internal role contract, preloaded into every cad-verifier rung agent. Not a user command.
cad-assumptions-analyzer-contract
Internal role contract, preloaded into every cad-assumptions-analyzer rung agent. Not a user command.
cad-capture
Capture a phase-linked todo, a seed idea for a future milestone, or a note, without losing your place - .planning/CAPTURE.md, or --cadence for friction with Cadence itself.
cad-reviewer-contract
Internal role contract, preloaded into every cad-reviewer rung agent. Not a user command.