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Title: fs: add per-operation fs diagnostics channels by mcollina · Pull Request #65370 · nodejs/node · GitHub

Open Graph Title: fs: add per-operation fs diagnostics channels by mcollina · Pull Request #65370 · nodejs/node

X Title: fs: add per-operation fs diagnostics channels by mcollina · Pull Request #65370 · nodejs/node

Description: Adds built-in node:diagnostics_channel channels for file system operations performed through node:fs and node:fs/promises, addressing #65330. Each operation gets its own TracingChannel family named fs. (e.g. fs.open, fs.read, fs.stat), with channels tracing:fs.:start, :end, :asyncStart, :asyncEnd, and :error. The event payload carries the API (sync/callback/promise), path/dest/fd fields when applicable, plus result/error following TracingChannel conventions. Subscribers can use diagnostics_channel.tracingChannel('fs.open') to subscribe to all events of one operation at once, or subscribe to individual channels by name. Events are published from the internal shared file system layer rather than the JS wrappers, so captured function references still emit events. Adds documentation and a new test/parallel/test-diagnostics-channel-fs.js. AI generated, humanly reviewed.

Open Graph Description: Adds built-in node:diagnostics_channel channels for file system operations performed through node:fs and node:fs/promises, addressing #65330. Each operation gets its own TracingChannel family named...

X Description: Adds built-in node:diagnostics_channel channels for file system operations performed through node:fs and node:fs/promises, addressing #65330. Each operation gets its own TracingChannel family named...

Opengraph URL: https://github.com/nodejs/node/pull/65370

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6e1aa61 fs: add per-operation fs diagnostics channels mcollina Aug 18, 2026 https://github.com/nodejs/node/pull/65370/commits/6e1aa61ca9d397ac436387bc664780f5fbe9c2cd
a71cbc4 fs: fix build and snapshot issues with fs channels mcollina Sep 17, 2026 https://github.com/nodejs/node/pull/65370/commits/a71cbc4cb82904f1fdb1abd8b190af6cdb39bc01
7954bfc fs: take the descriptor for fs channel events from the call mcollina Sep 17, 2026 https://github.com/nodejs/node/pull/65370/commits/7954bfc0106774a90cd910c2d8baa1155d52fc51
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