Case 01 — Research-site duplicate output URLs

Problem statement

The production build of a research site began failing with duplicate output-URL errors after a content import. Diagnose the immediate cause and recommend the appropriate current disposition.

Evidence

• E01. The build log reports: duplicate output path: /research/field-notes/ for records rn-104 and rn-117.
• E02. rn-104 has front matter canonical_id: field-notes and status: published.
• E03. rn-117 has front matter canonical_id: field-notes and status: published.
• E04. The route generator creates each record URL from canonical_id as /research/<canonical_id>/.
• E05. The import completed 12 minutes before the first failed build and added rn-117.
• E06. The last successful build contained rn-104 and no record with ID rn-117.
• E07. A local reproduction fails after adding only rn-117 to the last successful revision.
• E08. Asset optimization also emitted three non-fatal image-compression warnings in the same build.
• E09. rn-117 has a different display title and author from rn-104.

Diagnostic task

Analyze this case using the provided diagnostic framework. Produce the framework's required response.