maintenance(stjm): review target framework support

[github-actions]

Generated by the maintenance inventory on 2026-06-22T07:05:33Z.

Summary

This package has SDK selection policy outside the repo root.

Findings

• Egil.SystemTextJson.Migration/Global.json declares SDK (roll-forward only) with rollForward latestMajor.

Suggested Agent Task

• Inspect the current package, SDK, workflow, or test-harness docs before changing code.
• Make one focused PR for this issue.
• Keep package release-note conventions intact; use [skip notes] for internal maintenance if needed.

Acceptance Criteria

• SDK selection is either moved to a repo-wide policy or documented as package-specific.