product-requirements/README.md cites dev/procedures/technicalGotchas.md, which no longer exists

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Found during the 2026-07-26 product-wiki growth pass (#739, PR #745) while spot-checking citations the recent dev/procedures/ → gcec-local-pack move may have superseded.

The dead reference

product-wiki/product-requirements/README.md line 60 cites dev/procedures/technicalGotchas.md's ctz-derivation rule. That file no longer exists — per .claudinite/local/packs/gcec/README.md, the pack "replaced the always-@-imported dev/procedures/{workflow,github,testing,technicalGotchas}.md docs". dev/procedures/ now contains only fileDescriptions.md and highLevelDesign.md.

Why this one needs a human

The wiki-growth worker corrected the four sibling occurrences (Domain ×2, Market, Users) in PR #745, but it must never write product-wiki/product-requirements/ — that folder is the reviewed, human-maintained crossing point. So this fifth occurrence is filed rather than fixed.

Where the content actually went (verified against the current tree, and worth using rather than the first guess)

• The ctz unanimity / refusal-to-guess rule — the one this line cites — is not in the gcec pack's RULES.md at all. Its home is the contract header of extension/event-extractors/helpers/derive-timezone.js: "a wrong ctz is worse than none … so a zone is returned ONLY when TWO INDEPENDENT page-declared hints agree — never guessed from one, "" whenever anything disagrees." That header is the right target for this citation.
• For reference, the two neighbouring rules did land in the pack, in different sections: "prefer extracting JSON-LD/og: … over brittle DOM positions" is under architecture rules of the road, and "a supported/registered host is necessary but not sufficient for an event" (Supported host with no parseable event still suggests a (dateless) event #133) is under Codebase gotchas.

Suggested fix

Repoint line 60 at extension/event-extractors/helpers/derive-timezone.js's contract header, with a note that the previously-cited doc was superseded when it folded into the gcec pack.

Refs #692
Refs #739

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repo-tidy triage (2026-07-27): small, well-scoped fix — retarget product-wiki/product-requirements/README.md line 60 from the removed dev/procedures/technicalGotchas.md to the contract header of extension/event-extractors/helpers/derive-timezone.js (confirmed that file still holds the ctz-unanimity rule; the old target file does not exist in main). Since this folder is human-maintained (the wiki-growth worker must not write here per this issue's own note), it needs an owner/human edit rather than an automated one. Labeling quick-win.

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Triage (repo-tidy pass, 2026-07-27): confirmed still open — product-wiki/product-requirements/README.md line 60 still cites dev/procedures/technicalGotchas.md, which does not exist in main (only fileDescriptions.md and highLevelDesign.md remain under dev/procedures/). Labeling quick-win: the fix is exactly as scoped in the issue body — repoint the citation to extension/event-extractors/helpers/derive-timezone.js's contract header (verified present in main, carries the "two independent hints agree" ctz rule), noting the old doc folded into the gcec local pack. Left unmerged since this folder is reviewed/human-maintained and outside this pass's scope.

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Repo-tidy triage (2026-07-31): reconfirmed — product-wiki/product-requirements/README.md line 60 still cites the removed dev/procedures/technicalGotchas.md. Fix unchanged: repoint to extension/event-extractors/helpers/derive-timezone.js's contract header (still present, still carries the ctz two-hint rule). quick-win label stands — this folder is human-maintained, so the edit needs an owner/human pass.

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