Tutorials Intermediate
DeepSeek Harness: Ship Your First dsh Plugin Bundle
Build a custom tool plugin for DeepSeek's new open-source agent harness, then ship it as a bundle.
15 min read·Kodetra Technologies
YesterdayGuides
AI Guides for Builders
How-to content for builders, indie hackers, and AI engineers. Less theory, more shipped code.
Tutorials 
Tutorials Intermediate
V4-Pro 0813 Just Went GA: A Multi-Step DeepSeek Agent
Build a tool-using DeepSeek V4-Pro agent with effort escalation, on the day it hit GA.
9 min read·Kodetra Technologies
6d ago
Tutorials Intermediate
Drop-In Claude Swap: DeepSeek via the Anthropic SDK
Run your Claude Messages API code on DeepSeek V4-Pro by changing one base URL.
9 min read·Kodetra Technologies
9d ago
Tutorials Intermediate
DeepSeek V4-Flash KV Cache: Cut Input Costs 50x
Structure prompts so DeepSeek's disk cache hits, and pay ~50x less on repeated input tokens.
9 min read·Kodetra Technologies
14d ago
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
15d ago
Tutorials Intermediate
DeepSeek V4-Flash Tool Loop: A Coding Agent for Cents
Build an autonomous file-editing coding agent on DeepSeek V4-Flash's tool-calling API for pennies.
9 min read·Kodetra Technologies
16d ago
Machine Learning Advanced
Verifiers v1: Train Agents Past the Context Window
Ship a taskset, swap any harness, and turn compacted rollouts into real RL training samples.
13 min read·Kodetra Technologies
Jul 14
Tutorials Intermediate
DeepSeek V4 Pro: Cheap 1M-Token Context in Python
Use DeepSeek V4 Pro's auto KV cache to run huge-context jobs for cents.
8 min read·Kodetra Technologies
Jun 13
Tutorials Intermediate
Agent Harness in Python: Give LLMs Shell and File Access
Build a safe local agent harness with shell, files, approvals, and logs in Python.
10 min read·Kodetra Technologies
Jun 3
Tutorials Beginner
OpenAI Agents SDK Sandbox: Build Safer AI Agents
Learn to build safer autonomous AI agents using OpenAI Agents SDK's new sandbox harness.
2 min read·Kodetra Technologies
Apr 19