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Fix remaining READ-convention sample links across this PR's 18 articles
The same plain-backtick "See sample: \`x.good.al\`." form fixed on al-methods-limited-during-write-transactions (PR #161) turned up repo-wide on 15 more of this PR's articles - Knowledge-Retrieval.ps1 requires the markdown-link form to associate a sample with its article. All 16 fixed; the four local validators (frontmatter, knowledge-index, knowledge-retrieval, review-fixtures, skill-index) pass.
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@ -19,10 +19,10 @@ A procedure that reads a field from a setup or configuration table inside a bran
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Once a business rule has decided that a setup-table field's value is required for a branch to behave correctly, call `TestField` on it before use, even though a plain read would "work" by returning a blank or zero without erroring. Write a test that blanks the setup field and asserts the resulting error, so the guard itself is verified rather than merely present.
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See sample: `testfield-required-setup-field.good.al`.
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See sample: [`testfield-required-setup-field.good.al`](testfield-required-setup-field.good.al).
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## Anti Pattern
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Reading a required setup-table field behind a presence check that falls through to a default value instead of erroring. This looks defensive because it never crashes, but it converts "administrator forgot to configure this" into "system silently did something else" — worse than a hard failure, because nobody is told anything went wrong.
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See sample: `testfield-required-setup-field.bad.al`.
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See sample: [`testfield-required-setup-field.bad.al`](testfield-required-setup-field.bad.al).
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