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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.308 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
Home / Reference / Hook events

FileChanged

hook never mined documented JSON

A Claude Code hook event, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

When a watched file changes on disk. The matcher field specifies which filenames to watch

Anthropic's own wording. Read off Hooks reference, captured 2026-10-22.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 150on this box, as of v2.1.309
Written about v2.1.83 first named in a changelog, 24 Mar 2026

In the changelogs

5

Releases whose published page names FileChanged.

  1. v2.1.295
    claude mcp serve gains an HTTP mode, limited to remote cloud sessions

    In remote cloud sessions only, claude mcp serve can now listen over HTTP with --transport, --port and --session-tunnel

    found in this entry's text

  2. v2.1.229
    Hooks are handed a session object instead of reading globals

    Hooks now get an explicit session with id, working directory and project root instead of guessing from globals.

    found in this entry's text

  3. v2.1.187

    found in this entry's text

  4. v2.1.120
    File Watcher Error Handling

    found in this entry's text

  5. v2.1.83
    CwdChanged and FileChanged Hooks

    found in this entry's text

First cited

1

The earliest release whose published evidence quoted FileChanged was v2.1.295, 8 Oct 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.

ReleaseDateThe span that was quoted
v2.1.2958 Oct 2026FileChanged hooks never run under claude mcp serve --transport http

Presence across releases

0

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the hook event does. All hook events.

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