What to change
Pattern-based rules are efficient but can match more than the author intended. Ask the developer to provide a short set of addresses that must move and a contrasting set that must remain untouched. Include current articles sharing similar prefixes with the retired material. The owner should approve the observed results rather than the rule syntax, and the same examples should accompany future changes to that pattern.
A worked example
Illustrative example
Illustrative test: Use similarly named old and current guide slugs to challenge the rule.
How to check the result
Retired routes move correctly while current guides remain independently accessible.
A mistake to avoid
Testing only a rule's intended match misses harmful overmatching.
Your action checklist
Use these checks to prepare a discussion with your team or supplier. Tick a check when you have recorded the decision or evidence, rather than when a feature has simply been promised.
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Further reading
These primary sources provide additional context for the project decisions above.
Related decisions
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