Tutorials Intermediate
Claude API 2026-10-21: Build a Migration Scanner in Python
Claude SDK 2.0 and API 2026-10-21 break old code. Scan for every 400 and TypeError first.
14 min read·Kodetra Technologies
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AI Guides for Builders
How-to content for builders, indie hackers, and AI engineers. Less theory, more shipped code.
Tutorials 
Tutorials Intermediate
GitSpawn: Scan Untrusted Repos Before Your AI Agent Does
A repo's .git/config can run code the moment a coding agent calls git. Build a preflight scanner.
11 min read·Kodetra Technologies
9d ago
Tutorials Intermediate
Gemini 4 Argon Long Decode: 200K Tokens, One Request
Use Argon's background long decode to generate 1M tokens of output, with cost math.
9 min read·Kodetra Technologies
9d ago
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
10d ago
Tutorials Intermediate
Agent Tool Broker: Identity, Audit Log, Kill Switch
Build an out-of-model tool broker in Python: per-agent identity, scoped policy, tamper-evident logs.
10 min read·Kodetra Technologies
11d ago
Tutorials Intermediate
Blocked Is an Alert: Egress Gates for Claude Agents
Build a Python egress gate that stops the four workarounds Anthropic saw Claude use on live sites.
12 min read·Kodetra Technologies
11d ago
Tutorials Intermediate
EmbeddingGemma 2: Build Text and Image Search in Python
Run Google's new open multimodal embedder locally and search text, images and video with one index.
10 min read·Kodetra Technologies
14d ago
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
16d ago
Tutorials Intermediate
Mistral Large 4 Preview: Canary-Test Silent Model Updates
Mistral Large 4's preview can change without notice. Build a Python canary suite that catches it.
11 min read·Kodetra Technologies
16d ago
Tutorials Intermediate
Claude Code Mods: Build a Fail-Closed Bash Guard in JS
Write a Claude Code mod that blocks, asks, and logs risky shell commands, then test it.
16 min read·Kodetra Technologies
18d ago
Tutorials Intermediate
Claude 950-Agent Swarm: Build a Funnel in Python
Rebuild the 21-hour enzyme-hunt pattern: cheap triage, deep read, budget cap, resumable.
11 min read·Kodetra Technologies
24d ago
Tutorials Intermediate
Sonnet 5.5 Drops tool_choice: Build a Strict Tool Router
Forced tool use now 400s on Claude Sonnet 5.5. Replace it with strict tools and a retry guard.
9 min read·Kodetra Technologies
25d agoPage 1 of 7