Document early access options.

[bgravenorst]

Summary

Documents how to list early access CLI options, the options whose names start with --X and that --help omits.

• Adds an Xhelp entry next to --help in the CLI options reference.
• web3signer -X, web3signer --Xhelp, and web3signer Xhelp list the options grouped by command. web3signer eth2 -X and web3signer eth1 -X list only that subcommand's options.

The docs call these early access options, matching the Besu docs. The CLI output still labels them unstable.

Fixes #416.

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Note

Low Risk
Documentation-only updates with no runtime or security behavior changes.

Overview
Documents how operators can discover early access CLI flags (--X…) that --help hides.

The CLI reference gains an Xhelp section for -X / --Xhelp, including a caution that these options may change without notice and examples for the root command, eth1, and eth2 (global list vs subcommand-scoped list). The distroless Docker how-to for read-only roots is updated in the same vein: wording now says “early access option,” and the tip points readers to web3signer eth2 -X via the new reference anchor instead of only noting the flag is hidden from help.

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Project	Deployment	Actions	Updated
doc-web3signer	Ready	Preview	Oct 7, 2026 2:01am UTC