OSS
rtk is at 80,460 stars for a token-reduction proxy and carries 1,620 open items split almost evenly between PRs and issues
rtk-ai/rtk claims 60-90% token reduction on common dev commands from a single dependency-free Rust binary, and it cut dev-0.50.0-rc.439 on 2026-09-14. The open queue splits 781 PRs to 839 issues, which open_issues_count 1,620 would hide entirely, and the newest issues are precise rewrite failures: `gh pr view --json <field>` exiting 1 with no rewrite, a pytest filter dropping the duration line so a 3-second run and a 10-minute run look identical. The defect shape is worth reading before you put a rewriting proxy in front of your agent's shell.
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