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 fzfclee/consulting-skills --skill assumption-inventorygit clone --depth 1 https://github.com/fzfclee/consulting-skillsWrote 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/fzfclee/consulting-skills/assumption-inventory)<a href="https://agentmods.dev/skills/fzfclee/consulting-skills/assumption-inventory"><img src="https://agentmods.dev/badge/skills/fzfclee/consulting-skills/assumption-inventory/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/fzfclee/consulting-skills/assumption-inventory"><img src="https://agentmods.dev/badge/skills/fzfclee/consulting-skills/assumption-inventory.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 | $0.00050 | $0.00766 |
| Opus 5.5 | $0.00020 | $0.00306 |
| Sonnet 5.5 | $0.00010 | $0.00153 |
| Haiku 4.5 | $0.00005 | $0.00077 |
Grade A, and why
assumption-inventory 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 — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Assumption Inventory
Use this skill to expose the assumptions underneath a diagnosis or plan and decide which ones need testing first.
Method Notes
- An assumption is something the plan relies on but has not yet proven.
- Not all assumptions require immediate testing. Prioritize assumptions by impact if wrong and uncertainty.
- This skill is useful before investing effort, making stakeholder moves, or committing to a strategy.
Required Inputs
Collect or infer these inputs before execution:
- current diagnosis, plan, or recommendation
- intended outcome
- key stakeholders or users
- known facts and constraints
- major risks if the plan is wrong
If an input is missing, mark it as missing, state the assumption used, and add a validation action.
When Not To Use
Do not use when the issue is primarily role ownership, numerical prioritization, or root cause analysis. Use raci-matrix, wsjf-prioritization, or five-whys-root-cause instead.
Step-by-Step Execution
| Step | Required input | How to execute | Output |
|---|---|---|---|
| State the plan or diagnosis | Current recommendation, target outcome. | Write the conclusion in one plain sentence. | Plan / diagnosis statement. |
| Extract assumptions | Plan components, stakeholder beliefs, constraints, evidence gaps. | Ask what must be true for this plan to work. | Assumption list. |
| Classify assumptions | Assumption list. | Label each as market, customer, stakeholder, capability, resource, timing, risk, economics, or compliance. | Classified assumptions. |
| Rate criticality | Impact if wrong, uncertainty, reversibility. | Score impact and uncertainty as high / medium / low. Mark whether the assumption is reversible. | Critical assumption table. |
| Prioritize tests | Critical assumptions, available access, deadline. | Select the few assumptions that must be tested before action. | Test priority list. |
| Define evidence needed | Assumption, test method, success criteria. | State what evidence would confirm, weaken, or disprove the assumption. | Assumption test plan. |
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 · 80 lines · 50 tokens per session scan A 45c531e57a57
assumption-inventory is a skill published in the GitHub repository fzfclee/consulting-skills (7 stars, last pushed 15d ago), licensed Apache-2.0. It adds 50 tokens to every session and 766 once invoked, about $0.0002 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 2026-08-31.
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