Under the hood
Forked subagent invocations now pass their tool list through to the context builder
What
When Claude Code forks a subagent (a separate Claude instance spun up to handle part of a task), the call that builds its context now includes tools: e.options.tools, passing along the set of tools the subagent has available.
Why
This makes the subagent's available tools visible to the context-building step, which likely improves how context is assembled around what that subagent can actually do.
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The writer flagged doubt
What consumes this added `tools` value and what effect it has is not stated.