All Articles
Layering Gemini API Response Caches in Three Tiers — How I Split Memory, Redis, and Context Cache
Notes from running a three-tier cache (in-memory, Redis, Gemini Context Cache) in front of the Gemini API for six weeks across a wallpaper app — actual hit rates, billing impact, and the invalidation traps that ate me alive.
Why per-turn generationConfig is ignored in Gemini API chat sessions
If you pass a different generationConfig (temperature, max_output_tokens, response_schema) to each send_message in a google-genai chat session and the behavior never changes, this walkthrough shows what is actually happening, why the SDK is designed that way, and three workarounds we use in production for review-summary and reply-draft pipelines.
Running an SLO and Error Budget for the Gemini API as an Indie Developer — Guarding Four Sites with Burn-Rate Monitoring
Notes from running the Gemini API inside four production sites as an indie developer. A practical SLO and Error Budget design that fits a single-person operation: Cloudflare Workers and KV for burn-rate calculation, simplified multi-window alerts, and decision rules for what to freeze when the budget runs out.
A Daily Slack Digest of Six Apps' Store Reviews, Built with Gemini Flash
How I built a Cloud Run + Gemini Flash ETL that translates, classifies, and prioritizes 30–80 daily store reviews across six apps and posts them to Slack — cutting my review triage from 60 minutes to 12, for about $4 a month.
Letting Gemini Flash Decide continue / pause / rollback for Staged Rollouts: An Indie Developer's Three-Signal Engine
How I built a Gemini Flash decision engine that reads Firebase Crashlytics, App Store / Google Play reviews, and AdMob revenue together, and outputs continue / pause / rollback for each staged rollout across six indie apps. Numbers from two months of production use included.
Two Months of Letting Gemini Audit My Internal Links
An implementation note from running internal link integrity checks on my four Lab sites with Gemini 2.5 Flash for two months. What grep missed, how Flash compared to Pro on this task, and the surprises along the way.
Why Gemini API Streaming Drops on iOS After Backgrounding — and How to Fix It
When your iOS app receives a streaming response from Gemini API and the user briefly switches to another app, the stream often goes silent forever. Here's how URLSession actually treats long-lived HTTP, and the smallest change that brings reliability back.
Running Gemini 3 Pro and Flash in Parallel on AdMob Monthly Reports — Notes from Ten Mornings
Implementation notes from sending the same AdMob monthly report to Gemini 3 Pro and Gemini 3 Flash in parallel for ten days. Cost, latency, and summary quality compared from an indie developer's perspective.
Coalescing Gemini API Requests with SSE Fan-out: Collapsing 100 Simultaneous Hits into a Single Call
How I rebuilt the post-push-notification thundering herd on a 50M-download wallpaper app into a Cloudflare Durable Objects coalescer with SSE fan-out, cutting Gemini API costs by 92% with 14 days of production telemetry.
Pairing Gemini API with Apple FoundationModels (iOS 26): An On-Device-First Hybrid Routing Notebook
Running iOS 26 FoundationModels alongside Gemini API as a hybrid stack for a wallpaper app's poem-from-image feature: routing decisions, full Swift code, and one week of latency and cost numbers.
Designing a Semantic Cache for the Gemini API — Embedding-based Answer Caching That Actually Pays for Itself
A practical design for a semantic cache that sits in front of the Gemini API. Combines text-embedding-004, cosine similarity thresholds, versioned cache keys, and TTL design to balance hit rate and answer quality, with Python and Cloudflare Vectorize code that runs in production.
When gemini-2.5-flash-image Ignores Your Reference Image — Diagnosing Why Nano Banana Returns a Totally Different Picture
A field-tested triage order for the situations where gemini-2.5-flash-image (Nano Banana) silently ignores your reference image, swaps the subject, or refuses to honor your edit instructions. Covers parts ordering, response_modalities, image size, and chat-session pitfalls with runnable code.