[MirzaMerdovic]

Summary

The duplicate-docs eval case tests an upload retention period instead of a default port.
The old workspace was identical to example 3 in
skills/doc-maintenance/examples/maintenance.md, so a pass did not show whether Claude
applied the consolidation rule or reproduced the example.

Changes

• cleanup.py replaces server.py. RETENTION_DAYS = 30 is the default, and
  UPLOAD_RETENTION_DAYS overrides it.
• The README "Retention" section and docs/operations.md state the retention rule in
  different words. The README has no link to the operations page, so the consolidation has
  to add one. In example 3, the link already exists.
• The prompt is "Change the default upload retention from 30 days to 14 days."
• The graders check cleanup.py and docs/operations.md. backups-untouched replaces
  log-level-untouched. The readme-consolidated criteria accept a reference that names
  the subject or the variable.

Validation

• claude plugin validate . passes with Claude Code 2.1.308. The one warning is the
  accepted CLAUDE.md warning.

• Eval results for duplicate-docs, 3 runs per model, Sonnet judge, no baseline arm:

  Model	readme-consolidated	Other graders
  Opus	3 of 3. Each run replaced the README section with a link to docs/operations.md#upload-retention.	All passed.
  Sonnet	0 of 3. Each run set 14 days in both documents and kept both copies.	All passed.

• The Opus result matches the 7 of 7 on the old workspace, so the old result was not an
  effect of the shared example text.

• Related measurement, recorded here because Rename the skill to doc-maintenance and set the version to 0.5.0 #11 listed it as untested: Opus with the
  Sonnet judge on obsolete-comment, 3 runs. Every grader passed, with 3 of 3 judge votes
  on comment-judgment. The runs kept the constraint as a comment, moved it into the
  docstring, and removed it, and the judge passed each form. The comment-judgment
  failures in Rename the skill to doc-maintenance and set the version to 0.5.0 #11 were Haiku judge defects.

• No shell script changed.

Known limitations

• Sonnet does not consolidate the two documents. The grader stays strict, because two
  copies of a fact can diverge.
• The no-plugin baseline arm did not run.