ZenML is a Python framework for turning machine-learning and AI workflows into tracked pipelines that run on different infrastructure backends. It is for ML and AI engineers building applications such as model-training workflows, language-model systems, and agent loops in company environments.
Borrowing it
Nothing to install: this file belongs to zenml-io/zenml. 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/zenml-io/zenml/main/.claude/skills/field-descriptions/SKILL.mdgit clone --depth 1 https://github.com/zenml-io/zenmlWrote 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/zenml-io/zenml/field-descriptions)<a href="https://agentmods.dev/skills/zenml-io/zenml/field-descriptions"><img src="https://agentmods.dev/badge/skills/zenml-io/zenml/field-descriptions/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/zenml-io/zenml/field-descriptions"><img src="https://agentmods.dev/badge/skills/zenml-io/zenml/field-descriptions.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 | $0.00070 | $0.00523 |
| Opus 5 | $0.00035 | $0.00262 |
| Sonnet 5 | $0.00014 | $0.00105 |
| Haiku 4.5 | $0.00007 | $0.00052 |
Grade A, and why
field-descriptions 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 9d 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
Field Description Standards
When adding or modifying Field descriptions in stack component configs:
Template Structure
{Purpose statement}. {Valid values/format}. {Example(s)}. {Additional context if needed}.
Core Requirements
- Purpose: Clearly state what the field controls or does
- Format: Specify expected value format (URL, path, enum, etc.)
- Examples: Provide at least one concrete example
- Constraints: Include any limitations or requirements
Quality Standards
- Minimum 30 characters
- Use action words (controls, configures, specifies, determines)
- Include concrete examples with realistic values
- Avoid vague language ("thing", "stuff", "value", "setting")
- Don't start with "The" or end with periods
- Be specific about valid formats and constraints
Example Field Descriptions
# Good examples:
instance_type: Optional[str] = Field(
None,
description="AWS EC2 instance type for step execution. Must be a valid "
"SageMaker-supported instance type. Examples: 'ml.t3.medium' (2 vCPU, 4GB RAM), "
"'ml.m5.xlarge' (4 vCPU, 16GB RAM). Defaults to ml.m5.xlarge for training steps"
)
path: str = Field(
description="Root path for artifact storage. Must be a valid URI supported by the "
"artifact store implementation. Examples: 's3://my-bucket/artifacts', "
"'/local/storage/path', 'gs://bucket-name/zenml-artifacts'. Path must be accessible "
"with configured credentials"
)
synchronous: bool = Field(
True,
description="Controls whether pipeline execution blocks the client. If True, "
"the client waits until all steps complete. If False, returns immediately and "
"executes asynchronously. Useful for long-running production pipelines"
)
Validation
- Run
python scripts/validate_descriptions.pyto check description quality - All descriptions must pass validation before merging
- Add validation to CI pipeline to prevent regressions
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.
- 9d ago First seen · 63 lines · 70 tokens per session scan A 84a8f6a61e0e
field-descriptions is a skill published in the GitHub repository zenml-io/zenml (5,578 stars, last pushed yesterday), licensed Apache-2.0. It adds 70 tokens to every session and 523 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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