An external write that keeps a file's byte length and mtime was missed twice: the Maven launch fingerprint reused the stale class snapshot, and watcher events for clean open documents were dropped by the (mtime, length) stamp check.
The launch fingerprint now records a blake3 content hash for project files (toolchain inputs such as the JDK's lib/modules keep the stamp only) and bumps its version. Watcher events for clean documents compare the disk bytes with what saving the buffer would write; blind focus scans keep the stamp dedup, and forced refreshes after IDE disk operations still reload clean buffers.
Co-authored-by: qtvbwfn <5848026+qtvbwfn@users.noreply.github.com>
Qingandqtvbwfn
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