Duck Cloud Blog

Practical guides for Duck Cloud tools, security, and workflows

Tutorials, SEO-friendly explainers, and step-by-step articles that link directly to the tools they describe.

Infrastructure

Docker Compose Environment Variables: Trace the Value

Trace Docker Compose values through interpolation and container precedence, inspect resolved configuration safely and prevent incorrect deployment settings.

Oct 5, 2026

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Data Integrity

YAML Implicit Types: Prevent Configuration Surprises

Catch YAML implicit-type changes before deployments by checking parser versions, quoting intended strings and validating the rendered configuration schema.

Oct 5, 2026

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Data Integrity

JSON Large Integers: Preserve IDs and Exact Values

Prevent JSON large-integer precision loss by defining string IDs, exact decimal contracts and round-trip tests across JavaScript, databases and exports.

Oct 5, 2026

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API Design

JSON Patch vs Merge Patch: Choose Safe API Updates

Compare JSON Patch and JSON Merge Patch for API updates, including nulls, arrays, allowed fields and concurrency checks that prevent surprising changes.

Oct 5, 2026

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API Design

HTTP If-Match: Prevent Lost Updates in Your API

Prevent lost API updates with strong ETags, If-Match checks and atomic version comparisons, then give clients a safe conflict-resolution workflow.

Oct 5, 2026

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Web Platform

Time-Zone-Aware Schedules: Avoid DST Surprises

Design recurring schedules with IANA time zones, explicit daylight-saving policies and test dates so local business times stay correct across clock changes.

Oct 5, 2026

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Web Platform

Browser Storage Persistence: Protect Local App Data

Design browser storage with persistence checks, safe exports and recovery paths so a local web app does not confuse cached data with a reliable backup.

Oct 5, 2026

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Web Platform

Subresource Integrity for Third-Party Scripts

Add Subresource Integrity to fixed third-party scripts, manage digest changes during deployment and diagnose blocked resources without weakening protection.

Oct 5, 2026

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Security Practice

Write a Reproducible Security Bug Report

Write security bug reports with authorized test scope, minimal reproduction steps, concrete impact and evidence that reviewers can verify without guesswork.

Oct 5, 2026

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AI Engineering

AI Tool Schema Changes: Keep Existing Calls Working

Plan backward-compatible AI tool schema changes with recorded call fixtures, versioned adapters and migration checks that protect existing integrations.

Oct 5, 2026

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AI Engineering

Quantized LLM Memory: Plan Beyond the Model File

Estimate quantized LLM memory requirements beyond download size, then test context length, concurrent requests and runtime overhead before deployment.

Oct 5, 2026

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AI Engineering

Local LLM Chat Template Mismatch: A Debugging Guide

Fix local LLM role confusion, repeated replies and broken tool calls by checking chat templates, tokenizer revisions and request formatting step by step.

Oct 5, 2026

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