Tutorials Intermediate
Prompt Cache Retention: Cut OpenAI Bills Up to 90%
Structure prompts, set prompt_cache_retention, and read cached_tokens to slash GPT-5.6 input costs.
8 min read·Kodetra Technologies
4d agoGuides
AI Guides for Builders
How-to content for builders, indie hackers, and AI engineers. Less theory, more shipped code.
Tutorials 
Tutorials Intermediate
Grok 4.5 Tool Loops: Tune Effort and Cache to Cut Cost
Build an agentic Grok 4.5 tool loop in Python: route reasoning_effort and cache to slash cost.
7 min read·Kodetra Technologies
4d ago
Tutorials Intermediate
Build a Prompt-Injection Eval for Claude Sonnet 5 Agents
Sonnet 5 claims better hijack resistance. Here's how to measure it yourself.
10 min read·Kodetra Technologies
13d ago
Tutorials Intermediate
Semantic Caching for LLMs: Cut Your Token Bill in Python
Build a semantic cache that reuses answers for similar prompts and slashes LLM API costs.
10 min read·Kodetra Technologies
14d ago
Tutorials Intermediate
Agentjacking Defense: Firewall Your AI Agent Tools
Build a Python trust-boundary firewall that stops prompt-injection attacks on your AI coding agent.
10 min read·Kodetra Technologies
21d ago
Tutorials Intermediate
Loop Engineering: From Prompts to Verified Agent Loops
Build a plan-act-verify agent loop with an external check, retry budget, and clear stop rules.
9 min read·Kodetra Technologies
27d ago
Tutorials Intermediate
Fable 5 Prompt Caching: Slash 1M-Token Codebase Costs
Reuse a huge codebase prefix across every Fable 5 call and pay ~90% less.
8 min read·Kodetra Technologies
28d ago
Tutorials Intermediate
Dynamic Workflows in Claude Code: 1000 Subagent Tutorial
Anthropic shipped Dynamic Workflows on May 28. Spawn 1000 parallel subagents from one prompt.
11 min read·Kodetra Technologies
May 29
Tutorials Intermediate
Opus 4.8 Mid-Convo System Messages in Python (Cache-Safe)
Use Opus 4.8 role:system messages mid-conversation to update agent rules without invalidating cache.
10 min read·Kodetra Technologies
May 29
Tutorials Intermediate
DSPy GEPA: Auto-Optimize AI Agent Prompts
Use DSPy GEPA to auto-evolve prompts with reflection and beat hand-tuned baselines.
4 min read·Kodetra Technologies
May 23
Security Advanced
How to Secure an MCP Server Against Tool Poisoning
Harden MCP servers: kill tool poisoning, validate tokens, sandbox tools
9 min read·Kodetra Technologies
May 20
Tutorials Intermediate
MobAI + Claude Code: Autonomous iOS App Testing Guide
Let Claude Code test your entire iOS app autonomously — no XCUITest scripts, just one prompt. Setup guide.
6 min read·Kodetra Technologies
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