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/geeksfino/openskills/fork-testnpx skills add Geeksfino/openskills --skill fork-testgit clone --depth 1 https://github.com/Geeksfino/openskillsWrote 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/geeksfino/openskills/fork-test)<a href="https://agentmods.dev/skills/geeksfino/openskills/fork-test"><img src="https://agentmods.dev/badge/skills/geeksfino/openskills/fork-test.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 | $0.00017 | $0.00141 |
| Opus 5 | $0.00009 | $0.00071 |
| Sonnet 5 | $0.00003 | $0.00028 |
| Haiku 4.5 | $0.00002 | $0.00014 |
Grade A, and why
fork-test 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 4d 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.
What it actually says
Fork Test Skill
This skill exists only for testing the context: fork pattern.
Purpose
Validates that:
- Forked contexts properly isolate intermediate outputs
- Tool calls are recorded in the session
- Only summaries are returned to the parent context
- Multiple tool calls are tracked correctly
Instructions
When this skill is activated, perform the following actions:
- Read the provided input
- Execute any requested tool calls
- Return a concise summary of the results
Return the input unchanged as the result.
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.
- 4d ago First seen · 29 lines · 17 tokens per session scan A 1b1f852def0e
fork-test is a skill published in the GitHub repository Geeksfino/openskills (70 stars, last pushed 6d ago), licensed Apache-2.0. It adds 17 tokens to every session and 141 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 2026-08-30.
Other skills, from other repositories
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agent-memory
../../../engineering/agent-memory/skills/agent-memory/SKILL.md.
agile-product-owner
../../../product-team/agile-product-owner/skills/agile-product-owner/SKILL.md.
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mochi-remind
Handle due reminders — notify the user with natural language and mark them done.