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Coding Agent Landscape

Updated April 2026

Open Source

Agent	Category	Lang	Notes
Acolyte	Terminal agent	TS	Local-first, lifecycle-driven, observable
Codex	Terminal agent	Rust	OpenAI's agent, sandbox execution

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name	plan
description	Design a feature or behavior change through dialogue. Use when asked to plan, scope, design, or break down work before coding.

If an issue number is given, fetch it with gh issue view $ARGUMENTS and use it as the starting point.

Have a design conversation about this task. Read the relevant code, share what you find, say what you think, and let the user shape the direction. The plan emerges from the dialogue — do not build it in isolation.

If a question can be answered by reading the code, read the code instead of asking.

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Acolyte Benchmarks

Measured comparisons of Acolyte against prominent open-source AI coding agents. All metrics are from source code analysis — no opinions, just counts.

Metrics extracted with benchmark.sh

Projects Compared

| Project | Language | Description | Source Lines | Files | Dependencies |

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Setting Up Codex

Prerequisites

• Codex installed
• Recommended: install Codex via Homebrew for easy updates
• GitHub CLI authenticated (gh auth login)
• Copy config.toml to ~/.codex/config.toml

Quick Start

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Setting Up Claude Code

Prerequisites

• Claude Code installed
• Recommended: install Codex via Homebrew for easy updates
• GitHub CLI authenticated (gh auth login)
• Copy settings.json to ~/.claude/settings.json

Quick Start

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import {
  OpenAPIRegistry,
  OpenApiGeneratorV3,
  RouteConfig,
  ZodRequestBody,
  extendZodWithOpenApi,
} from '@asteasolutions/zod-to-openapi';
import { OpenAPIObjectConfig } from '@asteasolutions/zod-to-openapi/dist/v3.0/openapi-generator';
import { Application, NextFunction, Request, RequestHandler, Response, Router } from 'express';
import fs from 'node:fs/promises';

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sealed interface Validator {
    fun validate(value: String): Int?
}

object RequiredValidator : Validator {
    override fun validate(value: String): Int? =
        if (value.isNotBlank()) null else ValidationError.Required
}

object EmailValidator : Validator {

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import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow
import kotlinx.coroutines.flow.update

interface State

interface Action

typealias Reducer<State, Action> = (State, Action) -> State

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@Composable
fun DatePicker(
    label: String,
    value: String,
    onValueChange: (String) -> Unit = {},
    keyboardActions: KeyboardActions = KeyboardActions.Default,
    keyboardOptions: KeyboardOptions = KeyboardOptions.Default,
    pattern: String = "yyyy-MM-dd",
) {
    val formatter = DateTimeFormatter.ofPattern(pattern)

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import kotlin.random.Random

fun main() {
    val secretNumber = Random.nextInt(1, 100)

    var numTries = 0
    var numTriesLeft: Int
    var gameWon = false

    println("Welcome to Guess a number!")