Add guide: run a Java coding agent safely with Docker Sandboxes#25474

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dvdksn:worktree-java-sbx-guide

Commits on Jul 1, 2026

docs: add guide for running a Java coding agent in a Docker Sandbox

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docs: revise Java sandbox guide per review feedback

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docs: reword guide linkTitle to 'Coding agents for Java'

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docs: set guide linkTitle to 'Kit out your sandbox for Java'

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docs: use allowedDomains to match the current kit spec reference

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docs: broaden the kit definition beyond this guide's usage

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docs: clarify where a kit can be loaded from

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docs: generalize the finished-sample reference

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docs: correct that the base sandbox ships a JDK but not Maven

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docs: clarify the kit prepends its toolchain ahead of the base JDK

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docs: use a named throwaway sandbox through the walkthrough

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docs: declare the kit network allowlist up front

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docs: drop the allow-all network discovery workaround

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docs: validate the kit after the network block, before running

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