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
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.
Open-source tools are read from the published source at each release tag, including the tag-to-tag diff. Closed tools are read from each distributed build. Setup and workflow guides live in the AI Coding Harness Guide.
| Tool | Vendor | Analysis basis | Latest tracked |
|---|---|---|---|
| Claude Code | Anthropic | Distributed binary | v2.1.209 (July 14, 2026) |
| Codex CLI | OpenAI | Source at release tag | v0.144.3 (July 14, 2026) |
| OpenCode | SST | Source at release tag | v1.17.19 (July 14, 2026) |
| Gemini CLI | Source at release tag | v0.47.0 (July 14, 2026) | |
| Amp | Sourcegraph | Distributed binary | First analysis in progress |
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 diff between release tags.
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 diff between release tags.
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 diff between release tags.
Amp Version Tracker: Environment Variables, Models & Features
We analyze every Amp release to document environment variables, model roster, and feature changes, extracted from each distributed binary and paired with Amp's public news feed.