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 gaelic-ghost/socket --skill select-analysis-isolationgit clone --depth 1 https://github.com/gaelic-ghost/socketWrote 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/gaelic-ghost/socket/select-analysis-isolation)<a href="https://agentmods.dev/skills/gaelic-ghost/socket/select-analysis-isolation"><img src="https://agentmods.dev/badge/skills/gaelic-ghost/socket/select-analysis-isolation/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/gaelic-ghost/socket/select-analysis-isolation"><img src="https://agentmods.dev/badge/skills/gaelic-ghost/socket/select-analysis-isolation.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 | $0.00051 | $0.00650 |
| Opus 5.5 | $0.00020 | $0.00260 |
| Sonnet 5.5 | $0.00010 | $0.00130 |
| Haiku 4.5 | $0.00005 | $0.00065 |
Grade A, and why
select-analysis-isolation 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 — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Select Analysis Isolation
Overview
Choose the smallest environment that contains the behaviors the analysis may trigger and can still reproduce the target platform. Treat isolation as a set of controls to verify, not a label supplied by a product.
Read references/isolation-matrix.md before selecting an environment for execution or privileged tooling.
Workflow
-
Identify the behavior to contain.
- Record target OS/runtime, expected privilege, kernel or device access, persistence, networking, anti-VM behavior, and data sensitivity.
-
Choose the environment.
- Use local read-only inspection for non-executing metadata and text extraction.
- Use a disposable container for bounded Linux user-space tooling when VM-level isolation and target-platform behavior are unnecessary.
- Use a disposable VM for installers, services, dynamic behavior, or full-OS effects.
- Use a macOS VM or spare Mac for macOS payload behavior; do not substitute a Linux container.
- Use a remote sandbox only after data-egress approval and provider-capability review.
-
Remove ambient authority.
- Exclude personal accounts, host directories, shared clipboard, drag/drop, host sockets, USB/device passthrough, SSH agent, developer certificates, browser profiles, password stores, cloud tokens, and unrelated secrets.
-
Constrain networking.
- Default to no network or a simulated service.
- If external traffic is required, allow only recorded destinations through a monitored boundary and capture DNS/routes/packets proportionately.
-
Establish lifecycle evidence.
- Record base image or restore image, OS build, tool versions, configuration, snapshot, clocks, and baseline state.
- Define exactly which evidence may be exported and how it will be scanned before reaching the host.
-
Verify teardown.
- Stop the workload, export intended evidence, revert or destroy disposable state, revoke temporary credentials, and confirm no host share or forwarded port remains.
What ships with it
2 files 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.
- 1mo ago First seen · 49 lines · 51 tokens per session scan A 27cae2b904e2
select-analysis-isolation is a skill published in the GitHub repository gaelic-ghost/socket (7 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 51 tokens to every session and 650 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 2026-09-03.
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