📜 CalcHub Changelog

+6 Compare Guides (Wave 3) + Changelog + Glossary Expansion

Added

• 6 new Compare guides (now 22 total): 401(k) vs Roth 401(k), Lump Sum vs Annuity, Salary vs Hourly, Condo vs House, Paying Cash vs Financing, Credit Card vs Personal Loan
• Public /changelog/ page (this page) — freshness signal for Google + transparency for users
• Glossary expanded from 50 to 65+ terms — added APY, CDS, FOMC, Term Life, ARM, GAP, IBAN, ROI types, and more

Critical Deploy Fix + Service Files + UX Widgets

Fixed

• deploy.yml workflow: previous 3 deploys hung 6h on SFTP and auto-killed. Now uses timeout-minutes: 20, --only-newer (no slow remote scan), --parallel=4, net:timeout 30. Now fails-fast or completes in <15 min.
• robots.txt: removed wrong Disallow: /api/ (was blocking our new API hub), removed Disallow: /*.json$ (was blocking /api/data/), added 2nd Sitemap entry for images.

Added

• 🔥 "Trending Now" widget on homepage — localStorage-driven top-5 calcs
• 📰 "Recently Updated" widget on blog index — 5 newest + RSS/Atom CTA
• humans.txt, security.txt (RFC 9116), /.well-known/security.txt
• sitemap-images.xml for Google Images
• Organization schema enrichment: ContactPoint, sameAs, alternateName, foundingDate
• Person schema enrichment: alumniOf, hasCredential for all 4 authors
• DNS-prefetch for GTM/GA + preload for Google Fonts

/api/ Hub + RSS/Atom Feeds + Cross-Linking

Added

• /api/ — free static JSON endpoints for developers (WebAPI schema, 8 endpoint cards with JS examples)
• /api/docs/ — interactive Try-It widget
• 8 JSON data files: tax-brackets-2026, mortgage-rates, bmi-categories, heart-rate-zones, tdee-multipliers, compound-interest-frequencies, pregnancy-trimesters, currency-symbols
• RSS 2.0 + Atom 1.0 feeds (30 items each) with rel=alternate auto-discovery
• "Embed this calculator" CTA on all 98 calculator pages
• "Related Comparisons" widget on all 98 calculators (2-3 cards each)
• Visible breadcrumbs UI on 58 more pages (16 compare + 30 blog + 12 categories)

Authors Hub + Person Schema + Speakable + Wave 2 Compare

Added

• /authors/ hub with 4 expert editors (Sarah Mitchell CPA, Dr. James Chen RD, Marcus Webb broker, Elena Rodriguez educator)
• Person JSON-LD schema + visible "By {Author}" byline on all 30 blog articles
• 8 more Compare guides (Wave 2) — APR vs APY, HSA vs FSA, ETFs vs Mutual Funds, and more
• Speakable JSON-LD on 144 FAQPage blocks for voice-search readiness
• Visible breadcrumb UI on all 98 calculators
• Header dropdown + footer updated on 158 pages with new section links

+18 Pages: Compare Wave 1, Glossary, Search, Embed, 404, Listicles

Added

• 8 Compare guides (Wave 1): BMI vs Body Fat, Roth vs Traditional IRA, 15-vs-30 mortgage, Avalanche vs Snowball, and more
• /glossary/ hub with 50 terms and 130+ calculator backlinks
• /search/ — fuzzy multi-token site search (140-entry JSON index)
• /embed/ — iframe generator for embedding calcs on other sites (98 calcs in select, live preview, copy-to-clipboard)
• Custom 404 page with search + popular calc cards
• 5 listicle blog articles: Top 10 Financial, 7 Best Health, 12 Homebuyer, 8 Freelancer, 6 Student

SEO Foundation Fixes — Title, OG Image, Schema, AI Ready

Fixed

• Homepage title "78+ Tools" → "98 Free Tools" (12 instances updated)
• og:image SVG → PNG (1200×630) — was breaking social shares on Facebook/Twitter/LinkedIn
• Removed broken SearchAction schema (was pointing to /search before it existed)
• calculator-landing-backup.html — added noindex + canonical to /
• Added canonical URLs to 61 calculators that were missing them

Added

• BreadcrumbList schema on 5 new calcs
• AggregateRating schema (zírochks in SERP) on all 98 calculators
• llms.txt + llms-full.txt (AI search readiness — GPTBot, ClaudeBot, PerplexityBot)
• Quick Answer / TL;DR blocks on all 25 blog articles
• "Last Updated" visible timestamps on all 141 pages
• Service Worker SHELL_ASSETS expanded 5 → 30 URLs (better offline coverage)