PR #1422 closes a real corruption window in the coding-agent end-to-end edit path (proven by the new test in packages/coding-agent/test/core/hashline.test.ts), but the coding-agent [Unreleased] section had no Fixed entry. AGENTS.md requires every package-affecting change to land under [Unreleased]; add the entry so the fix is not invisible at release time.
oldschoola
3e4c57c08d