Deno 2.5.1 release notes, 17 Sep 2025

feat(unstable): support Deno.HttpClient in WebSocket (#30692)
feat(unstable): tcp proxy for Deno.HttpClient (#30700)
fix(bundle): set the type of the outputFile in the deno bundle to Uint8Array<ArrayBuffer> (#30716)
fix(check): filter resolution errors for bare ambient modules (#30690)
fix(ext/fetch): mark unix and vsock proxy conns as proxy (#30699)
fix(ext/node): handle falsy values enumerability in process.env (#30708)
fix(ext/node): implement fchmod on windows (#30704)
fix(ext/node): make fs.glob accepts URL cwd (#30705)
fix(ext/node): set default callback for fs.close (#30720)
fix(ext/node): validate fs.close callback function (#30679)
fix(ext/node): validate fs.read on empty buffer (#30706)
fix(ext/node): validate readlink arguments (#30691)
fix(ffi): check that fast calls are taken (#30658)
fix(http): duplicate listener should inherit onError and signal (#30680)
fix(init): regression where deno init --npm stopped working on mac (#30730)
fix(lsp): don't write lockfile during cache-on-save (#30733)
fix(node): reduce chance of module not found error due to missing copy package (#30744)
fix(permissions): point to correct config file in error message in workspace containing permissions at root (#30742)
fix: Add info/hint for unstable Deno.bundle API (#30682)