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
Context Compaction: Run Claude Agents Past 200K Tokens
Use Anthropic's compact-2026-01-12 beta so long agentic loops survive past the 200K context window.
11 min read·Kodetra Technologies
8d 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
Build an LLM Spend Governor: Budget Caps in Python
A runnable Python governor that caps LLM spend per user and auto-downgrades models.
10 min read·Kodetra Technologies
15d ago
Tutorials Intermediate
Code Mode for MCP: Let Claude Write Code to Call Tools
Cut MCP agent context up to 99% by exposing tools as a code API the model calls in code.
9 min read·Kodetra Technologies
19d 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
Claude Advisor Tool: Pair Haiku With Opus in Python
Let a cheap executor model consult a stronger advisor mid-task in one Messages API call.
11 min read·Kodetra Technologies
22d 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
Claude Programmatic Tool Calling: Cut Agent Token Costs
Let Claude write code that calls your tools in a loop — 20–40% fewer tokens, same accuracy.
10 min read·Kodetra Technologies
28d agoPage 1 of 2