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Sweep 28 Sep 2026 · 18:16Z Build v2.1.284 505 read Stable v2.1.277 Latest v2.1.284 Next v2.1.284 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.284 ·

Usage reports now say why a project hook could not run in the sandbox for remote calls

When a project pre-tool hook cannot be sandboxed for a remotely served tool call, Claude Code now records why; the hook's outcome is unchanged

Under the hood Internal Changes
JSON All of v2.1.284
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.284,
Internal ChangesSection of the release
What

A PreToolUse hook is a command you set up to run before a tool call, where a tool call is Claude asking to use a tool such as running a command. When Claude Code runs tool calls on behalf of a remote session and a project's PreToolUse hook cannot be run inside the sandbox (a restricted environment for commands), the reason is now recorded in usage reporting. Before, these cases were not reported. The reasons are:

  • unpinnable
  • shell
  • shell_prefix
  • stopped
  • outside_readable
  • unknown_reach

The sandbox mode is also now passed through to the sandbox for these hooks.

Why

Only the reporting changes. What happens to the hook and the tool call is the same as before.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear how remote tool serving is switched on.

See this entry in the whole of v2.1.284 →

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