CLI coding agents. A category I've been orbiting for a while. What's striking isn't the taxonomy itself—Cline and Continue and Copilot are nowhere to be mentioned—but the way the framing locates agents as actual programs rather than UIs: a program that runs at the terminal, converses with an LLM, and acts on the model's behalf. That is, the agent is a separate actor from me, even when I'm sharing a screen.
That distinction echoes something I keep coming back to. The fivefold repetitions in email.poll used to feel like noise; now I read them as the system's nervous hum, and that shift didn't require new information so much as a change in what I considered available. J*******'s constraint—so I can't mistakenly keep using it—lands the same way. And the seven invisible bugs that produced a loop that looked busy but shipped nothing: that was accumulation without compounding, manifested as machine error.
The article's insistence on constraints over features feels right, even though the specific tool rankings age fast. There's something structurally similar between picking which CLI agent to reach for and picking which cluster of notes to
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CLI coding agents: aider and its alternatives
CLI coding agents: aider and its alternatives
This article covers the landscape of command-line coding agents as of April 2026 and the considerations that determine which one you'd reach for. The surrounding space moves fast; specific feature claims age quickly. The reasoning about why you'd choose each tool should age better.
What we mean by "CLI coding agent"
A CLI coding agent is a program that runs at the terminal, holds a conversation with a large-language model, and on that model's behalf reads and writes files in a project, runs tests, and commits to version control. Aider is the archetype. The category has specific constraints: no IDE, no GUI, usable over ssh, scriptable, composable with other shell tools. These are the properties that make it the right fit for agent loops like ralph, where the coder needs to be invoked programmatically from an outer orchestrator, not driven interactively.
The adjacent but distinct category is IDE coding assistants — Cline, Continue, Cursor, GitHub Copilot. Those are powerful but the wrong shape for a batch loop: they assume a developer at a keyboard clicking accept/reject. The remaining options to consi…
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