content: add 5 Denmark canons; re-verify 3 aging canons

[dbwls99706]

Summary

Denmark (dk) had only 5 canons, all generic EU-template entries (roaming, hygge, 112, EHIC, Schengen 90/180) - zero coverage in banking, legal, policy, disaster, food-safety, or mental-health. Not claimed by either open PR (checked #179, which claims Finland, and #181, which claims Greece). Fills the gap with 5 primary-sourced canons across banking, legal (x2), policy, and mental-health. Also re-verifies this cycle's assigned bucket of aging canons.

New canons

• policy/cpr-number-required-for-everything/dk - A CPR number (civil registration number) is required before a newcomer can open a bank account, register a NemKonto, or access most services - a passport/residence permit alone isn't enough. CPR registration itself requires an already-secured permanent address, which most municipalities only grant after 1-3 months of residing there, creating a real chicken-and-egg gap for arrivals.
• banking/mitid-p-code-no-online-banking/dk - Non-citizens without a CPR number can get MitID (Denmark's digital ID) via an 8-digit P-code tied to a foreign passport, but a P-code MitID cannot log into online/mobile banking - eBanking and Mobile Bank require a MitID created with a genuine CPR number at "Substantial" security level.
• legal/face-covering-public-ban/dk - Since 1 August 2018, Straffeloven section 134c bans face-covering garments (niqab, burqa, etc.) in any publicly accessible place nationwide, not just at demonstrations - enforced with a fine starting at 1,000 kroner, applying to residents and tourists alike.
• legal/alcohol-age-6-percent-threshold/dk - Since 1 April 2025, Denmark's retail alcohol age split changed from a 16.5% ABV threshold to 6% ABV: 16-17-year-olds may now buy only beverages up to 6% (ordinary beer), while anything above - including most wine - requires age 18. Pre-2025 knowledge that wine is buyable at 16 is now wrong.
• mental-health/livslinien-not-24-7/dk - Livslinien, Denmark's national suicide-prevention line (70 201 201), is not staffed 24/7 like the US 988 Lifeline - it runs 09:00-05:00 daily (as of a July 2026 hours expansion, previously 11:00-05:00), leaving a real overnight gap. For life-threatening emergencies at any hour, 112 is the correct fallback.

Checked each against existing Danish content for topic overlap - none found; all five cover distinct dead ends not touched by the existing 5 generic-template canons.

Sources used

• lifeindenmark.borger.dk (official newcomer portal, International House Copenhagen / Ministry of Immigration and Integration) - CPR registration process, NemKonto requirements
• mitid.dk (official MitID operator) and danskebank.dk - P-code MitID limitations for online banking
• politi.dk (Danish National Police) and danskelove.dk (Straffeloven statute text) - face-covering ban (Straffeloven §134c), fine amounts
• ism.dk (Ministry of the Interior and Health) and nordicalcohol.org (Nordic alcohol-policy monitoring body), corroborated by legaldesk.dk for the pre-reform 16.5% threshold - 2025 alcohol age reform
• livslinien.dk (official helpline operator) and avisen.dk (Danish news, reporting the July 2026 hours-expansion announcement) - Livslinien operating hours

Every dead_ends[]/workarounds[] entry has a citation; evidence_count: 3 on each canon.

Re-verified aging canons

This cycle's assigned bucket (seed dk, after excluding IDs already touched by open PRs #179 and #181):

• aws/dynamodb-provisioned-throughput-exceeded/awscli2-linux - all 4 cited AWS doc URLs re-read and still support the claims (provisioned/on-demand capacity, retry backoff, partition-key design). Note: the retry-backoff page (api-retries.html) has been substantially rewritten for 2026 with a new opt-in retry behavior (AWS_NEW_RETRIES_2026), but the underlying workaround (exponential backoff / adaptive mode for a single hot DynamoDB table) is still valid and is explicitly one of the doc's recommended adaptive-mode use cases.
• docker/npm-install-eacces-docker/docker27-linux - 2 of 3 sources still hold. The --unsafe-perm citation was broken: current npm v10 docs no longer document this flag at all, because it was removed entirely as of npm v7 (npm now always runs scripts with the effective uid/gid of the working directory owner when run as root). Replaced the source with npm's own v7 release-notes blog post confirming the removal, and updated why_fails to state this accurately (removed, not just discouraged).
• nextjs/parallel-routes-default/nextjs14-linux - content re-verified but the doc moved: building-your-application/routing/parallel-routes now redirects to api-reference/file-conventions/parallel-routes, and the default.js reference is now its own page. Also a real behavior change worth noting: a missing default.js for a named slot (e.g. @team) now causes a hard build/render error rather than a silent 404 (the implicit children slot still 404s). Updated both source URLs to the new canonical locations and added this nuance to the verdict summary.

Validation

• ruff check generator/ tests/ - passed
• python -m pytest tests/ -q - 369 passed
• python -m generator.validate --data-only - passed (2514 canons; 959 pre-existing aging warnings, 0 stale, 0 errors)
• python -m generator.build_site - built cleanly
• python -m generator.validate --site-only - passed

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Generated by Claude Code

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Project	Deployment	Actions	Updated (UTC)
deadends-dev	Ready	Preview	Aug 21, 2026 5:24pm