Tutorials Intermediate
Preserved Thinking: Build a Prefix-Drift Guard in Python
Claude now 400s agents that edit history. Catch the edit before the API does.
13 min read·Kodetra Technologies
9d agoGuides
AI Guides for Builders
How-to content for builders, indie hackers, and AI engineers. Less theory, more shipped code.
Tutorials 
Tutorials Intermediate
Haiku 5.5 Triage: Measure Effort, Then Route by Cost
Benchmark Haiku 5.5 effort levels on your own tickets, then route cheap-first.
10 min read·Kodetra Technologies
15d ago
Tutorials Intermediate
Gemini 3.8 Live: Build a Multilingual Voice Agent
Build a real-time voice agent with Gemini 3.8 Live Extended Thinking.
10 min read·Kodetra Technologies
27d ago
Tutorials Intermediate
Opus 5.5 Progress Updates: Stop Silent Agent Turns
Opus 5.5 moved agent narration into thinking blocks. Stream it back with display updates and nudges.
15 min read·Kodetra Technologies
28d ago
Tutorials Intermediate
Opus 5.5 Upgrade: Fix 4 Breaking Changes Before They 400
Opus 5.5 is 20% cheaper, but old thinking, tool_choice and computer-use code now fails. Fix it.
15 min read·Kodetra Technologies
29d ago
Tutorials Intermediate
Qwen3.8-Flash-Next: Preserved Thinking, Cheaper Agents
Qwen keeps reasoning across every turn by default. Exploit it, or pay for it.
11 min read·Kodetra Technologies
Aug 27
Tutorials Intermediate
Migrate to Gemini 3.7 Flash: The minimal Thinking Trap
Preflight your configs for gemini-3.7-flash: 5 breaking changes, a validator, real cost math.
12 min read·Kodetra Technologies
Aug 19
Tutorials Intermediate
DeepSeek V4-Flash: Fix the reasoning_content 400 Trap
Build a thinking-mode tool-calling agent on DeepSeek V4-Flash-0731 without the 400 error.
10 min read·Kodetra Technologies
Aug 4
Tutorials Intermediate
Opus 5 Effort Router: Auto-Pick Cost vs Capability
Route each task to the right Claude Opus 5 effort level and cut your token bill.
7 min read·Kodetra Technologies
Jul 27
Tutorials Intermediate
Gemini 3.6 Flash: Cut Agent Tokens With thinking_level
Build a token-thrifty tool-calling agent on Gemini 3.6 Flash using the new thinking_level control.
10 min read·Kodetra Technologies
Jul 22
Tutorials Intermediate
GPT-5.6 Persisted Reasoning: Reuse Thinking Across Turns
Use reasoning.context to reuse GPT-5.6's chain of thought across turns and cut redundant tokens.
9 min read·Kodetra Technologies
Jul 16
Tutorials Intermediate
Claude Sonnet 5: Adaptive Thinking and Effort in Python
Master Sonnet 5's on-by-default thinking and the effort knob to cut cost and latency.
9 min read·Kodetra Technologies
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