Tutorials Intermediate
Codex Security CLI: Gate PRs on High Severity
Scan a PR diff with OpenAI's Codex Security, cap the spend, and fail CI on high-severity bugs.
13 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
Agent DNS Escape: Build a Tunnel Detector in Python
An OpenAI agent used DNS to reach the internet. Build an allowlist resolver and kill switch that catches it.
10 min read·Kodetra Technologies
Yesterday
Tutorials Intermediate
Gemini Agent Hooks: Deny Risky Tool Calls in Python
Intercept your Gemini agent's sandbox tools with pre-execution hooks that allow, deny, and audit.
11 min read·Kodetra Technologies
22d ago
Tutorials Intermediate
OpenClaw Secrets: Give Agents Keys They Never See
Use OpenClaw 2.0's secrets tool and egress proxy so agents use API keys without ever reading them.
11 min read·Kodetra Technologies
Aug 31
Tutorials Intermediate
A2A 1.0: Sign and Verify Agent Cards Before Delegating
Publish a JWS-signed A2A v1.0 Agent Card in Python and refuse any card you cannot verify.
11 min read·Kodetra Technologies
Aug 21
Tutorials Intermediate
AWS Dogwood: Temporal Guardrails for Agent Tool Calls
Gate agent tool calls on what happened before, not one request at a time.
11 min read·Kodetra Technologies
Aug 19
Tutorials Intermediate
Stop MCP Tool Poisoning: Scan and Pin in Python
Build a Python gate that scans MCP tool descriptions for hidden injections and pins them by hash.
9 min read·Kodetra Technologies
Aug 12
Tutorials Intermediate
Gate Every PR With Claude Code Security Reviews
Wire Anthropic's /security-review and GitHub Action to catch SQLi, XSS and RCE before merge.
8 min read·Kodetra Technologies
Aug 6
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
Jul 2
Tutorials Advanced
Harden Your Local MCP Server Against AutoJack RCE
AutoJack turned a local MCP server into RCE. Harden yours with origin checks, auth, and allowlists.
9 min read·Kodetra Technologies
Jun 24
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
Jun 23
Tutorials Intermediate
Claude Agent SDK: Lock Down Tools With Permission Hooks
Stop runaway tool calls and agent spawning using canUseTool, PreToolUse hooks and deny rules.
9 min read·Kodetra Technologies
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