Codex Knowledge Base
Codex CLI for API Integration Testing: Agent-Driven Mock Generation, Contract Validation, and Test Harness Automation
Unit tests verify components in isolation. End-to-end tests verify the full stack. Between them sits integration testing — the practice of validating that.
The TanStack Supply Chain Attack: What Codex CLI Users Need to Know and How to Defend Your Pipeline
On 11 May 2026, a coordinated supply chain attack compromised 84 npm package versions across 42 @tanstack/* packages.
Building Custom Code Review Pipelines with the Codex SDK: Structured Findings Across GitHub, GitLab, and Azure DevOps
Codex ships with built-in GitHub pull request review — enable it in settings and every PR gets an automatic @codex review pass .
Codex as a Proactive Teammate: Thread Automations, Scheduled Monitoring, and Durable Views
Most developers still treat Codex as a reactive tool: open a session, issue a prompt, close the session.
Codex Mobile: Remote Agent Control from Your Phone via the ChatGPT App
On 14 May 2026, OpenAI shipped Codex inside the ChatGPT mobile app for iPhone, iPad, and Android — rolling it out in preview across all plans, including.
Property-Based Testing and Fuzzing with Codex CLI: Agent-Driven Edge-Case Discovery Using Hypothesis and fast-check
Example-based unit tests verify the cases you thought of. Property-based tests verify the cases you didn't. The difference matters most in parsing.
Codex CLI Meets Notion: MCP Integration, the External Agents API, and Knowledge-Driven Development Workflows
On 13 May 2026, Notion shipped its Developer Platform—Workers, database sync, webhook triggers.
Codex CLI for Monorepo CI Optimisation: Agent-Driven Test Impact Analysis and Selective Pipeline Execution
Monorepo CI pipelines are slow by default. A single-character change in a leaf package triggers a full build-and-test sweep across every project in the.
The Codex CLI Hackathon Playbook: Rapid Prototyping Under Time Pressure
Sea Limited and OpenAI announced the first regional Codex Hackathon series today, kicking off in Singapore on 6 June 2026 with US$30,000 in API credits for.
Eval-Driven Development with Codex CLI: Building Promptfoo Test Suites for AI Applications
Most teams building AI applications still rely on manual spot-checking to validate prompt changes.