Mirage is a virtual terminal for AI agents that presents files, command-line tools, and configurable runtimes through one interface. It helps agents access data and run computations across services with controlled visibility and actions, and the catalogue entries provide related integrations.
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 strukto-ai/mirage --skill mirage-filesystemgit clone --depth 1 https://github.com/strukto-ai/mirageWrote 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/strukto-ai/mirage/mirage-filesystem)<a href="https://agentmods.dev/skills/strukto-ai/mirage/mirage-filesystem"><img src="https://agentmods.dev/badge/skills/strukto-ai/mirage/mirage-filesystem/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/strukto-ai/mirage/mirage-filesystem"><img src="https://agentmods.dev/badge/skills/strukto-ai/mirage/mirage-filesystem.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00052 | $0.00227 |
| Opus 5 | $0.00026 | $0.00113 |
| Sonnet 5 | $0.00010 | $0.00045 |
| Haiku 4.5 | $0.00005 | $0.00023 |
Grade A, and why
mirage-filesystem 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 12d 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
Mirage Filesystem
Use the Mirage tools for virtual paths. Host filesystem tools cannot access those paths unless the user separately configured a FUSE mount.
Workflow
- Use the Mirage
ls,grep, orexecute_commandtool to discover mounted data. - Use the Mirage
readtool before modifying an existing file. - Use
editfor an existing file andwriteonly for a new file. - If an edit reports that the file changed since it was read, read the file again, reconsider the edit against the new content, and retry.
- Use
execute_commandfor pipelines and structured-file commands that need Mirage shell semantics.
Do not fall back to a host filesystem tool when a Mirage tool fails on a virtual path. Report the Mirage error or fix the Mirage configuration.
What ships with it
1 file 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.
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.
- 12d ago First seen · 19 lines · 52 tokens per session scan A cd4084e28d6b
mirage-filesystem is a skill published in the GitHub repository strukto-ai/mirage (3,623 stars, last pushed today), licensed Apache-2.0. It adds 52 tokens to every session and 227 once invoked, about $0.0003 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.
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