Best Practices for Designing New Ephemeral CLI Programs for the Agentic Era: A Proposal

I have published Best Practices for Designing New Ephemeral CLI Programs for the Agentic Era: A Proposal on Zenodo:

• Zenodo record: https://zenodo.org/records/19777274
• DOI: https://doi.org/10.5281/zenodo.19777274
• All-versions DOI: https://doi.org/10.5281/zenodo.19777273

This proposal grows out of an observation that has become increasingly hard to ignore: in local and sandboxed environments, the command-line interface is becoming the default interaction protocol for AI agents. That trend makes sense. CLI is already text-native, scriptable, composable, discoverable through conventions like --help, and often much more deterministic than GUI-driven or network-mediated interaction. When an agent can access a local shell, a well-designed CLI is frequently the shortest path between intent and execution.

The gap I want to address

A lot of current energy is going into making existing software accessible from the command line. That work is valuable. But it still leaves a different question underexplored:

How should we design brand-new CLI programs specifically for agent use?

In practice, developers increasingly write small, narrow, disposable, task-specific tools for agents:

• one-off repository analyzers,
• local code transformation utilities,
• structured extractors,
• file- and build-oriented wrappers,
• artifact validators,
• and other small programs built for a single workflow or sandbox.

These tools are often ephemeral in the sense that they are not intended to become large general-purpose Unix programs. They may live for a day, a week, or the lifespan of a project. Yet they still benefit enormously from good interface design.

That is the main target of the proposal: not just “put a CLI in front of existing software,” but design agent-native CLI tools from scratch, on purpose.

What I want this proposal to contribute

The document is a proposal for a future best-practices playbook. The intended contribution is a practical framework for building new ephemeral CLI programs that agents can use effectively in local environments.

Suggested citation

Wu, J. (2026). Best Practices for Designing New Ephemeral CLI Programs for the Agentic Era: A Proposal. Zenodo. https://doi.org/10.5281/zenodo.19777274

BibTeX

@misc{wu_2026_19777274,
  author       = {Wu, Jifeng},
  title        = {Best Practices for Designing New Ephemeral CLI Programs for the Agentic Era: A Proposal},
  month        = apr,
  year         = 2026,
  publisher    = {Zenodo},
  doi          = {10.5281/zenodo.19777274},
  url          = {https://doi.org/10.5281/zenodo.19777274},
}