Summary
Qwen Code's v0.15.6 nightly added FileReadCache for unchanged file reads and shipped proxy-aware request handling, then followed with a targeted fix to clear stale reads on history rewrites. The signal matters because Qwen is improving both token efficiency and session correctness at the runtime layer, not just adding model support.
What changed
Qwen Code introduced a file-read cache for unchanged reads, fixed proxy handling for network requests, and then patched cache invalidation on history rewrite paths.
Why it matters
Repeated file reads waste time and tokens in large codebases, while bad cache invalidation breaks trust in long sessions. Qwen is tightening both sides of the workflow: runtime efficiency and session correctness.
Evidence excerpt
The nightly release introduced FileReadCache and proxy fixes, and the follow-on PR explicitly clears that cache across history rewrite paths to prevent stale read behavior.