docs: read the ServerAssets token from a prompt in the test steps

[ryanbarlow97]

Summary

Follow-up to #26, which was merged before the same review fixes were applied in the sibling repositories:

• Point the installer at a generic TLibs checkout path instead of ../tlibs, which a default clone (TLibs) would not match on case-sensitive filesystems.
• Read GH_TOKEN with a silent prompt instead of putting it on the command line, so it stays out of shell history.

Checks

• README only.

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📝 Summary

Summary by CodeRabbit

• Documentation
  • Updated the test instructions to use a Python 3 installer path and Bash commands, and clarified how to point the installer to a TLibs checkout.
  • Documented that the ServerAssets token is supplied only to the release-preparation script and then unset, and that CI provides it through DEPS_TOKEN. The build command and Java 21 requirement remain unchanged.

Walkthrough

The README now documents a Python 3 installer command that targets a TLibs checkout. It prompts for a token, passes it to the release-preparation script, and then unsets it. The instructions also state that CI supplies the token from DEPS_TOKEN.

Changes

Release setup

Layer / File(s)	Summary
Release setup commands README.md	The instructions specify a TLibs checkout path and a prompted token. The token is passed to the release-preparation script and then unset. The README states that CI supplies the token from DEPS_TOKEN.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Other

Merge Risk: 🔵 Low · up to 7621a

The prompt keeps the token out of shell history, but Maven subprocesses still inherit it despite the README’s script-only claim. The underlying exposure predates this change, limiting the incremental risk.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 7621a

The prompt avoids typing the credential into shell history without adding a new credential consumer or changing CI permissions. Residual uncertainty concerns interrupted cleanup, actual token permissions, and external installer behavior.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The visible credential exposure remains the preparation process tree, including curl and installer descendants. The intended remote authority is Contents read access to ServerAssets, but actual local-token and CI-secret permissions are unknown; maximum compromised-token reach cannot be established from these files.

Trust Boundaries and Controls

• observed — The unchanged CI workflow maps DEPS_TOKEN to GH_TOKEN at the preparation step, not job-wide. The preceding pinned external setup action is not explicitly given that credential. Workflow contents permission is read-only, but this does not establish the separate DEPS_TOKEN permissions or external action behavior.
• inferred — Silent input removes the need to enter the token literally in a shell command. It does not prevent downstream environment inheritance or the unchanged expansion of the token into curl Authorization-header arguments.

Resilience and Maintainability Implications

• inferred — In an interactive Bash session that continues after command failure, the semicolon allows unset token to run after preparation returns. The prompt success condition gates only echo, not the following preparation command, and cleanup is not trap-based. Cancellation, abrupt interruption, and shell-option-dependent behavior remain unverified rather than established vulnerabilities.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @README.md:
- Line 32: Limit GH_TOKEN to the ServerAssets downloads: unset it after the
downloads and before invoking the install helper, then unset it in the parent
shell before running mvn clean verify. Update the release instructions to show
both unset points.

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