Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add closedloop-ai/claude-plugins/plugin install codeWrote 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/closedloop-ai/claude-plugins/closedloop-env)<a href="https://agentmods.dev/skills/closedloop-ai/claude-plugins/closedloop-env"><img src="https://agentmods.dev/badge/skills/closedloop-ai/claude-plugins/closedloop-env/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/closedloop-ai/claude-plugins/closedloop-env"><img src="https://agentmods.dev/badge/skills/closedloop-ai/claude-plugins/closedloop-env.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 | $0.00052 | $0.00349 |
| Opus 5.5 | $0.00021 | $0.00140 |
| Sonnet 5.5 | $0.00010 | $0.00070 |
| Haiku 4.5 | $0.00005 | $0.00035 |
Grade A, and why
closedloop-env 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.
What it actually says
ClosedLoop Environment
This skill provides access to ClosedLoop environment variables needed for file operations.
Get Environment Paths
Read the base environment file:
.closedloop-ai/env
The file contains KEY=VALUE pairs:
CLOSEDLOOP_WORKDIR- The run directory for this sessionCLAUDE_PLUGIN_ROOT- The plugin installation directoryCLOSEDLOOP_PRD_FILE- Path to the PRD fileCLOSEDLOOP_MAX_ITERATIONS- Maximum loop iterations
Common Paths
After reading the env file, construct paths like:
- Schema file:
{CLAUDE_PLUGIN_ROOT}/schemas/plan-schema.json - Plan file:
{CLOSEDLOOP_WORKDIR}/plan.json
Organization Learnings
Also read your agent-specific learnings file if it exists:
.closedloop-ai/learnings-{your-agent-name}
Where {your-agent-name} is your name: from your frontmatter in lowercase (e.g., plan-validator).
The learnings file contains an <organization-learnings> block with patterns from previous runs. These learnings capture what worked well and should be applied to improve your performance.
When learnings are present:
- Review the patterns before starting your task
- Apply relevant patterns to your work
- Acknowledge which patterns you applied in your response using the format specified in the learnings block
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.
- 1mo ago First seen · 42 lines · 52 tokens per session scan A 47ef8f07bb5a
closedloop-env is a skill published in the GitHub repository closedloop-ai/claude-plugins (122 stars, last pushed today), licensed Apache-2.0. It adds 52 tokens to every session and 349 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 2026-09-07.
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