Greptile Summary

Adds the missing warn() shell helper to packaging/standalone/install.envsubst. Without it, any call into the get_checksum fallback paths (unknown OS/arch combos or a non-matching checksum line from the release SHASUMS file) would silently crash the script with a command not found error rather than emitting a human-readable message.

• Defines warn() using printf '%s\n' "$*" >&2, placed in the existing #region logging setup block alongside debug, info, and error, consistent with where it logically belongs.
• The printf-over-echo choice and use of $* are both intentional and POSIX-correct for formatting all arguments into a single line on stderr.

Confidence Score: 5/5

Safe to merge — the change adds a single, straightforward function that was already being called but undefined, fixing a latent crash.

The diff is four lines that define warn() using printf '%s ' "$*" >&2. The function is already referenced in seven call sites within get_checksum; without it the script would crash with a command not found error whenever an unrecognized OS/arch or missing checksum is encountered. The implementation is correct, POSIX-portable, and consistent with the surrounding logging helpers.

No files require special attention.

Important Files Changed

_{Reviews (1): Last reviewed commit: "fix(installer): add missing warn helper" | Re-trigger Greptile}

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