Claude Code Version Tracker: Undocumented Env Vars, Feature Gates & Models
We analyze every Claude Code release to document undocumented environment variables, feature gates, and model IDs. Track all versions from v2.1.19 to latest.
AI Coding CLI Version Trackers
Updated by Alex Sorokoletov
Each tracked CLI gets a hub: every release analyzed for environment variables added and removed, model IDs, feature surface, and what the changes signal about direction.
Every analysis names the two versions it compares, links the official changelog for the release, and records features that shipped before the changelog mentioned them. Setup and workflow guides live in the AI Coding Harness Guide, and how the current Codex CLI, Gemini CLI and OpenCode releases handle hooks, plugins, configuration and permissions is in the reference docs.
How to read a tracker
Each hub lists its analyses newest first, with the version, the publish date and the headline change. An analysis covers environment variables added or removed, model IDs, feature flags and the changelog lines they correspond to. Claude Code, Codex CLI, OpenCode, OpenCode 2 and Gemini CLI get one analysis per release; Amp ships several builds a day, so it gets a daily roll-up instead.
Codex CLI Version Tracker: Environment Variables, Models & Features
We analyze every Codex CLI release to document environment variables, model IDs, and feature changes, grounded in the open-source code at each release tag and the official release notes.
OpenCode Version Tracker: Environment Variables, Config & Experimental Flags
We analyze every OpenCode release to document environment variables, config-schema keys, and experimental flags, grounded in the open-source code at each release tag and the official release notes.
OpenCode 2 Version Tracker: Environment Variables, Config & Features per Release
Every OpenCode 2 release analyzed: environment variables, config keys, and the features and fixes each 2.x build added, grounded in the tagged open-source releases and the OpenCode 2 docs.
Gemini CLI Version Tracker: Environment Variables, Models & Features
We analyze every Gemini CLI release to document environment variables, model IDs, and feature changes, grounded in the open-source code at each release tag and the official release notes.
Amp Version Tracker: Environment Variables, Models & Features
Daily roll-ups of Amp builds: environment variables, model roster and feature changes, cross-referenced with Amp's public news feed.