v0.4.1

Changed

• communicate reworked: the standalone-report IO reference (references/baseline-io.md) is retired and its content folded into the remaining references; rewrite.md and markdown.md tightened.
• The communicate load requirement is stated more strictly in communicate, using-superra, and main-agent.md.

Release Prep

• Version manifests bumped to 0.4.1 across the maintained Claude,
  marketplace, and Codex plugin metadata via scripts/bump-version.sh.