Borrowing it
Nothing to install: this file belongs to Happenmass/omux. 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/Happenmass/omux/main/.claude/skills/openspec-explore/SKILL.mdgit clone --depth 1 https://github.com/Happenmass/omuxWrote 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/happenmass/omux/openspec-explore)<a href="https://agentmods.dev/skills/happenmass/omux/openspec-explore"><img src="https://agentmods.dev/badge/skills/happenmass/omux/openspec-explore/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/happenmass/omux/openspec-explore"><img src="https://agentmods.dev/badge/skills/happenmass/omux/openspec-explore.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 | $0.00039 | $0.02104 |
| Opus 5.5 | $0.00016 | $0.00842 |
| Sonnet 5.5 | $0.00008 | $0.00421 |
| Haiku 4.5 | $0.00004 | $0.00210 |
Grade A, and why
openspec-explore 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 · 289 lines · 39 tokens per session scan A 4f534b22c2e0
openspec-explore is a skill published in the GitHub repository Happenmass/omux (102 stars, last pushed 3mo ago), with no licence file. It adds 39 tokens to every session and 2,104 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 2026-08-30.
Other skills, from other repositories
impeccable
Create distinctive, production-grade frontend interfaces with high design quality. Generates creative, polished code that avoids generic AI aesthetics. Use when the user asks to build web components, pages, artifacts, posters, or applications, or when any design skill requires project context. Call with 'craft' for…
plan-draft
Methodology for drafting a gobby plan document — phases, task format, TDD compatibility, categories, hierarchy, and dependency notation. Use when drafting or revising a plan artifact.
plan-review
Review a gobby plan document for missing requirements, bad sequencing, unhandled edge cases, weak testability, and traceability gaps. Use when asked to review or critique a plan.
build-rule
Use when user asks to 'build rule', 'create rule', 'author rule', 'write rule', 'add enforcement'. Interactive guide for authoring Gobby rule YAML definitions.
merge-expert
Methodology for PR-aware delivery — probe branch protection, open/gate PRs, land via GitHub when required, or run the direct multi-worktree merge campaign.
build-coordinator
Use when coordinating a full gobby build run for an epic or task, especially when the user assigns the current session as coordinator, asks for a coordination epic, wants build agents/worktrees monitored, or wants gobby build bugs fixed so future runs work unattended.