Python Crawler Script Finds Missing hreflang Return Links Across Localised Pages

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A common hreflang error occurs when one localised page references another, but the referenced page does not link back, which can cause search engines to disregard the pair. A developer shared a small Python script that checks every page in a URL list for this problem. The tool parses each page's alternate link tags, confirms self-referencing entries, and flags non-200 responses or redirects among alternates. The author advises normalising URLs such as trailing slashes in the CMS rather than in the checker, and recommends rate limiting when running it against production sites.

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Generating Localised Price Tables From a Single JSON Source

Pricing pages translated into several languages often end up with inconsistent price tables when updates are applied to some versions but not others. The recommended fix is to store prices as structured data and render every language version from that single source. Currency amounts are set explicitly per currency instead of being converted with live exchange rates, which keeps tables stable and intentional-looking. Intl.NumberFormat is used to handle locale-specific symbol placement, separators and spacing. A test loops over every locale and plan to fail the build when a price or translation key is missing, preventing half-updated tables from shipping.

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ProgrammingDEV Community ·

IBM Ties AI Agents to Named Owners and Expiring Credentials, Kill Switch Still Preview

IBM announced Agent Identity, now generally available, which links each AI agent to an owner, a permission status, and the systems it may access. Its Vault 2.2 product, also generally available, renews agent credentials on a schedule rather than leaving them static. IBM cited Gartner's projection that a typical Fortune 500 company will run more than 150,000 agents by 2028, while only 13 percent of organizations believe their governance can handle that scale. The Discover and Contain features, which cover finding unregistered agents and sandboxing with a kill switch, remain in technical preview. The article also notes Salesforce's similar controls, with spending caps available now and a self-triggering kill switch delayed until January 2027.

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ProgrammingDEV Community ·

Small RAG reranker experiment shows a tie, offering a verified pipeline but no proven gain

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ProgrammingDEV Community ·

Webhooks and polling together make crypto payment status tracking reliable

A crypto payment gateway confirms transactions asynchronously, since blockchain confirmations take time, so a backend learns of completed payments either by webhook or by polling. Webhooks are the fastest way to mark an order paid, but they can be delayed, retried, delivered out of order, or blocked, which risks paid customers with unpaid orders. A scheduled polling job that checks pending invoices acts as a slower, API-costly safety net for anything a webhook misses. The article's Express and Node.js example shows both paths calling one idempotent update so fulfilment happens only once. It also recommends verifying webhook signatures, responding quickly and queuing slow work, and logging each payment's source.

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