Agent Island

Local status and usage tracking for Claude Code and Codex

Agent Island monitors local session state for Claude Code and Codex, shows when a run needs your attention, and estimates token-based API value from local records. It is free, open source, and runs on macOS and Windows without requiring an account.

Agenticness = how independently a tool can take action, scored across 9 dimensions. Scored independently by David Kooi, Skylark Creations — see full rubric →

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Desktop

API

B2B

For Developers

Usage-Based

CLI

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About

What It Is

Agent Island is a desktop companion for coding agents, not a coding agent itself. According to its FAQ, it supports Claude Code and Codex and is meant to monitor local session state, surface “your turn” handoffs, and show provider-scoped usage information.

What to Know

Agent Island is useful for tracking and explaining coding-agent usage, but it is not a general-purpose autonomous agent platform. Its own documentation is careful about scope: it only claims support for Claude Code and Codex, and it does not claim...

Key Features

Monitors local session state for Claude Code and Codex

Shows when a coding run needs your attention

Displays provider-scoped usage surfaces

Reads local Claude Code and Codex usage records

Calculates estimated API value from input, output, cache-write, and cache-read tokens

Use Cases

Track when Claude Code or Codex needs a human handoff during a coding session

Estimate token-based API value from local agent logs for auditing or reporting

Compare provider-reported usage against locally observed session activity

Agenticness: Guided Assistant

Executes tasks you assign, one step at a time, within narrow domains.

High evidence

Last evaluated: Aug 3, 2026

Dimension Breakdown

Action Capability

Autonomy

Planning

Adaptation

State & Memory

Reliability

Interoperability

Safety

Operator Sovereignty

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Enterprise

API

B2B

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