--- title: "Practitioner's Corner" canonical: "https://current.tinyfish.ai/issue/16/practitioners-corner" publication: "TinyFish" publisher: "TinyFish" language: "en-US" guide: "https://current.tinyfish.ai/llms.txt" permalink: "https://current.tinyfish.ai/issue/16/practitioners-corner" issue: 16 section: "practitioners-corner" description: "Lessons from the field—what we see building at scale" authors: ["Nora Kaplan","Rina Takahashi"] published: 2026-02-16 updated: 2026-02-12 articles: 15 --- # TinyFish > CURRENT is a journal about AI agents in production, for the engineering and product leaders who have to make them work. Drawing on experience building enterprise web agents, it explains why the demo succeeded and the deployment didn't, and what that means for choosing vendors, briefing the board, and avoiding mistakes others have already made. [Read on the website]() ## Issue 16 — Practitioner's Corner Lessons from the field—what we see building at scale ### Dispatches from Production Scale - [What Got Normalized Away]() — By [Nora Kaplan]() · Published 2026-02-11 · Format: Field Dispatch The competitor tracking dashboard showed stable availability for three months, then a 12% price jump overnight. The data quality engineer pulled last quarter's manual collection logs to compare. Same product, same retailer, two weeks before the spike: "Limited stock—2-3 units available." This quarter's agent-collected entry for the same listing: "In stock." Three months of records told the same story. Something in the automation was smoothing away signals that preceded price changes. The data had gotten cleaner. ### The Builders - [What You Lose When You Remove the Screenshots]() — By [Rina Takahashi]() · Published 2026-02-12 · Format: Builder Profiles A login button moves from top-right to bottom-left during a site redesign. The HTML is identical—same element, same attributes—but your agent can't find it anymore. The spatial cues that signaled "this matters" or "wait here" vanish with the visual information when you strip the page down to text. ### The Number That Matters - [TLS Fingerprinting Creates 47x Success Rate Gap]() — Published 2026-02-11 Standard Python requests library achieves roughly 2% success rate against Amazon's 2026 anti-bot system. Switch to curl_cffi, which mimics browser TLS fingerprints, and success climbs to 94%. That's a 47-fold improvement from addressing a single technical layer most developers never see. ### Field Notes from the Ecosystem February brought infrastructure surprises. Automation systems designed to protect platforms turned on their own users. APIs that once felt generous suddenly imposed constraints that reshape how teams architect for scale. Power grids failed and reminded us that cloud infrastructure still runs on physical things. Railway's abuse detection took down legitimate databases. USPS capped their new APIs at 60 requests hourly without publishing how to get more. Azure West US spent 20 hours recovering from a power interruption because storage and compute wouldn't stabilize even after power returned. The usual operational chaos, now with better documentation. - **False Positives Terminated 3% of Railway** — [Source]() — Published 2026-02-11 Tag: Abuse Detection Railway's automated abuse detection incorrectly terminated legitimate workloads February 11, sending unexpected SIGTERM signals to active databases. New anti-fraud ruleset delivered false positives. Postgres and MySQL instances went offline across roughly 3% of platform services. - **USPS Caps New APIs at 60 Hourly** — [Source]() — Published 2026-02-11 Tag: Rate Limiting Legacy Web Tools retired January 25, 2026. Replacement APIs enforce default rate limits of 60 requests per hour. Higher thresholds exist but USPS doesn't publish available tiers or approval criteria. High-volume shipping operations now operate blind. - **Atlassian Switches to Points-Based API Quotas** — [Source]() — Published 2026-02-11 Tag: Rate Limiting Starting March 2, 2026, Jira and Confluence REST and GraphQL requests consume points based on work performed: data returned, operations triggered. Hourly quotas allocated per-tenant, per-app. No more simple request-per-second caps. - **Microsoft Patched 6 Actively Exploited Zero-Days** — [Source]() — Published 2026-02-11 Tag: Security Patching February 2026 Patch Tuesday addressed 58 vulnerabilities including 6 actively exploited in the wild. CVE-2026-21533 allows attackers to gain SYSTEM privileges through Remote Desktop Services. CVE-2026-21525 denial-of-service exploit found in public malware repository. - **Azure West US Took 20 Hours Recovery** — [Source]() — Published 2026-02-11 Tag: Power Infrastructure Power interruption starting February 7 at 07:58 UTC caused broad infrastructure reachability loss. As power stabilized, storage and compute components failed to return to healthy state. Cascading failures across dependent components. Full resolution February 8 at 04:24 UTC. - **Integration Issues Kill Agents, Not LLMs** — [Source]() — Published 2026-02-11 Tag: Agent Failures Three leading causes: bad memory management (dumb RAG), broken I/O (brittle connectors), and polling-based architectures. Polling wastes 95% of API calls, burns through quotas, never achieves real-time responsiveness. Webhooks or event-driven systems only. ### Practitioner Resources - **Railway's Fraud Prevention Incident: When Security Breaks Production** — [Source]() — Published 2026-02-11 Fraud detection sent SIGTERM to 3% of workloads. Postmortem traces how security tooling cascaded into production failures. - **The 8 Fallacies Meet AI: Distributed Systems in 2026** — [Source]() — Published 2026-02-11 Those classic fallacies now apply to LLM inference and agentic chains. Includes actual latency numbers from production systems. - **AI Agent Observability: The Verifiability Problem Nobody's Solving** — [Source]() — Published 2026-02-11 Organizations deploy digital labor they cannot inspect or govern. ClickHouse architect explains why observability lags deployment velocity. - **Web Scraping Infrastructure: Where Teams Actually Spend Money** — [Source]() — Published 2026-02-11 Nearly half build internal scrapers, most saw infrastructure costs rise. Survey data reveals what scraping at scale demands. - **Cursor AI Architecture: How AI-Powered IDEs Handle Multi-File Reasoning** — [Source]() — Published 2026-02-11 Task scheduling, memory optimization, context processing. Technical breakdown of how production AI development tooling actually works. - **Docker BuildKit 0.17: Multi-Architecture Builds and Content-Addressable Storage** — [Source]() — Published 2026-02-11 Cross-platform capabilities, incremental builds, cache optimization. BuildKit's architecture matters for modern CI/CD at scale. ## Other sections in Issue 16 - [Daily Brief]() - [Market Pulse]() - [Foundations]() - [Echoes]() - [Vision]() ## More - [Publication guide]() - [Issue archive]()