Borrowing it
Nothing to install: this file belongs to layer1labs/specsmith. 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/layer1labs/specsmith/main/.agents/skills/testing-environment-isolation/SKILL.mdgit clone --depth 1 https://github.com/layer1labs/specsmithWrote 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/layer1labs/specsmith/testing-environment-isolation)<a href="https://agentmods.dev/skills/layer1labs/specsmith/testing-environment-isolation"><img src="https://agentmods.dev/badge/skills/layer1labs/specsmith/testing-environment-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/layer1labs/specsmith/testing-environment-isolation"><img src="https://agentmods.dev/badge/skills/layer1labs/specsmith/testing-environment-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 | $0.00021 | $0.00361 |
| Opus 5.5 | $0.00008 | $0.00144 |
| Sonnet 5.5 | $0.00004 | $0.00072 |
| Haiku 4.5 | $0.00002 | $0.00036 |
Grade A, and why
testing-environment-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 2mo 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
Testing Environment Isolation
This skill ensures that testing environments are properly isolated from development environments while maintaining governance compliance.
Requirements Covered
- REQ-103: Testing Environment Isolation
- Ensures testing environments are properly isolated from development environments with human approval
Integration Capabilities
Environment Features
- Environment isolation enforcement
- Test environment setup and management
- Resource allocation separation
- Data isolation between environments
- Configuration management for test environments
- Clean environment reset capabilities
Governance Requirements
- Human approval required for environment isolation setup
- Configuration management with governance controls
- Approval-based environment creation
- Monitoring and logging of environment usage
Usage Examples
# Initialize environment isolation
specsmith skill install testing-environment-isolation
# Create isolated test environment
specsmith test isolate --env test --isolation-level full
# Configure environment isolation
specsmith test configure-isolation --env test --network-isolation true --data-isolation true
Configuration
The skill requires the following configuration in scaffold.yml:
isolation:
environment: test
network_isolation: true
data_isolation: true
resource_allocation: "dedicated"
cleanup_on_exit: true
Security Considerations
- All environment isolation configurations require human approval
- Network isolation must be properly enforced
- Data access controls must be maintained
- Resource allocation must be monitored
Compliance Requirements
- Follow security best practices for environment isolation
- Maintain audit logs of all environment isolation activities
- Ensure proper resource management and cleanup
- Enforce approval-based environment creation
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.
- 2mo ago First seen · 70 lines · 21 tokens per session scan A 65eac6fd31b5
testing-environment-isolation is a skill published in the GitHub repository layer1labs/specsmith (8 stars, last pushed 1mo ago), licensed MIT. It adds 21 tokens to every session and 361 once invoked, about $0.0001 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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