Lowvyn v7.6.2 — Release Notes

What's new

Walmart pages now seed Lowvyn instantly. When you visit a Walmart product Lowvyn doesn't track yet, the extension shares the on-page product data so Lowvyn can score it on the spot. Previously, Walmart products would just show "we don't track this yet."

The score updates as you browse. Click between products on Walmart, Amazon, or Best Buy and the Lowvyn card now refreshes within ~1 second. Before, it would get stuck showing the previous product's score.

Better thumbnails on the Lowvyn website. Walmart products tracked via the extension now consistently carry a product image into your product history view.

Polish. Fixed button spacing in the expanded score card so "Buy via Lowvyn" no longer butts against the buttons above it.

Added
- "View full history on Lowvyn" secondary button in the expanded score card. The overlay's expanded card now carries an outlined indigo button below the primary "Buy via Lowvyn" affiliate CTA that deep-links to the matched product page at
lowvyn.com/product-detail/<id>. Rendered only when the scoreboard payload carries an itemId (no dead links). Opens in a new tab so the user's shopping session isn't interrupted. Tagged ?ref=extension so GA can segment this traffic distinctly from organic
/product-detail visits. Telemetry event overlay_product_link_click fires with the itemId for attribution. The extension can only ever show one retailer's view — this gives users a one-tap path to the cross-retailer comparison and full price-history chart on
the website. Outlined-button style (cta-secondary) was chosen over a filled one so the primary affiliate CTA stays unambiguously primary.

Changed

• Release build now hard-fails on missing extension token. Every v7.x release shipped to date (v7.0..v7.4.1) bundled the literal placeholder LOWVYN_EXTENSION_TOKEN as the X-Lowvyn-Client-Token value because build_extension.sh warned-and-continued when
  LOWVYN_EXTENSION_TOKEN was unset (confirmed by unzip -p on the v7.4.1 release zip). After CLIENT_AUTH_ENFORCE=true flipped on the server (2026-05-02), the placeholder fails client-auth for every gated /api/items call from logged-out users. The bypass is now
  closed: build_extension.sh exits 1 if the env var is unset, equals the placeholder literal, or is shorter than 16 chars; it greps dist/*.js after substitution and unzips the final zip to verify the placeholder has been replaced everywhere. New
  build_token_substitution.test.js pins the contract with 10 source-invariant tests so the bypass can't sneak back in. Local development without a token continues to work via npm run build (sideload-unpacked, no substitution). See
  lowvyn-docs/current-implementations/client-auth.md → "Extension token resolution" for the bootstrap path.

Fixed the bug for Amazon products tracking.

Minor bug fixes of the last release.

Lowvyn 7.1.0

• Sessions now last 30 days. No more daily sign-ins.
• If your session does expire, you'll get a clear "please sign in again" notification instead of a silent failure.
• Fixed: the Lowvyn score pill no longer shows on retailer "page not found" pages.
• Fixed: items you remove on lowvyn.com now disappear from the extension too.
• Behind the scenes: groundwork for "this is cheaper at another retailer" callouts coming soon.

v7.0, Deal Overlay
• New: Lowvyn pill on Amazon.ca / Walmart.ca / BestBuy.ca product pages with deal score and verdict
• New: per-retailer toggle (mute on Walmart for grocery shopping, etc.)
• New: opt-in anonymous usage analytics to help us improve
• New: cleaner affiliate handling via lowvyn.com/r redirect

Extension v6.0.0: passive discovery, currency fix, category sync, refresh overhaul
New features:
- Passive product discovery: badge on icon + "Track this?" banner in popup
- Lowvyn Score and Deal Verdict displayed on item cards
- Full currency mapping for 18 Amazon domains (CAD, USD, GBP, EUR, JPY, etc.)
- Breadcrumb category extraction for Amazon, Walmart, Best Buy
- Server item pull on login and sync (items tracked via website appear in extension)

Behaviour changes:
- Non-CA items blocked from server sync (tracked locally only, "Non-CA retailer" badge)
- Refresh All: server items refreshed via API (fast), local items in parallel batches of 5
- Per-item 15s fetch timeout, partial success reporting ("Refreshed 19/21, 2 skipped")
- SyncItemPrice re-tracks on 403 (ownership lost)
- Best Buy badge colour differentiated from Walmart (yellow vs blue)
- Walmart's bare '$' currency now defaults to USD instead of staying as a symbol

Updated:
- About page rewritten with product vision, features, CA vs international explanation
- Manifest version bumped to 6.0.0
- Popup timeout increased to 2 minutes with a friendly background message

Added Amazon affiliate link.

Lowvyn v3.0.0 — Release Notes

Price Alerts
Set a target price for any tracked item and receive a native browser notification the moment the price drops below your threshold. Alerts sync to the server and persist across sessions.



Core Features

• Track Current Page — one click from any supported product page; duplicate items are updated, not re-added
• Refresh All — batch-refresh prices for all tracked items in one action
• Price History — lowest and highest prices recorded, with a per-check diff indicator
• Configurable Intervals — set how often prices are checked (30 min–24 hrs) and how often data syncs (15 min–12 hrs)
• Export / Import — back up and restore all tracked items and alerts as JSON

The release notes for version 2.0.0 include:
- New support for tracking items on Walmart and BestBuy.
- Improvements to price detection for items over $1000.
- Optimization of the "Refresh All" function.