engineering-workflow 0.9.3

What changed

• Preserves repository-owned and legacy top-level PLANS.md sections when compacting or archiving a completed active plan.
• Replaces only the validated active-plan section and the managed Recently Completed list, retaining the preamble, sibling content, and section order.
• Corrects a data-loss defect discovered while dogfooding 0.9.2 against the unified marketplace repository; the 0.9.2 release remains immutable.

Verification

• Focused lifecycle coverage passes for both compact and archive dispositions with customized sections before and after the active plan.
• Final repository gate passed 9/9, including all tests, validators, package byte parity, and whitespace checks.
• Skill quick validation, Codex plugin validation, strict Claude plugin/marketplace validation, public-tree privacy, and fully redacted Gitleaks tree/history scans passed.
• Exact main and annotated tag CI runs completed successfully.