oah helps you build an AI development workflow that fits you and keeps changing as AI improves. It is a working reference and a guide you can adapt.
A useful result needs more than generated code: the scope must be clear, the changes checked, and decisions kept for the next session. oah connects those steps so one request can carry through the work with a record of what happened.
002 / Why it keeps changing
Older rules and skills can hold a newer model back or make its results worse. Defaults should be easy to understand and change; a rule that gets in your way is a design problem to fix.
Keep the parts that help, remove what no longer helps, and revise the workflow as your tools improve. You can start with the full setup or take only the impact map, wiki, leases, evidence gates or review loop that your project needs.
003 / Why Claude builds and Codex reviews
This split comes from the author's own experience, not a measured comparison: Claude fills in details a beginner might miss in a first version; Codex checks and corrects within a fixed scope.
The current commands run Claude Code and Codex CLI. The ideas can also be adapted to another tool or harness, with one AI or several. Give each stage to the AI that suits your work.
004 / From one request to a checked change
Describe the result you want in plain language. The AI records the goal and scope, checks what the change touches, reserves its paths and chooses the tools for the task. Claude builds; Codex reviews, corrects and reviews again.
Gates record the checks and their results. The project wiki keeps the decisions and reasons beside the code. In v0.3.0, optional TypeSafe Jev can judge difficulty for model selection; rules remain the fallback when it is unavailable or uncertain.
005 / The decisions stay with you
You ask, answer when the AI needs a decision, and confirm before the change lands. If the same problem repeats or the work reaches a design choice, the loop stops to ask you.
Ask “Is the review done?” or “Did all the gates pass?” and inspect the evidence. The final confirmation belongs to you; writing code, checking it and approving its landing are separate steps.
006 / Free, open source, yours to adapt
oah is free, open-source software under the MIT license. Read the source, change it and bring the useful pieces into your own workflow. Your AI services and any optional services use their own accounts and billing.
The current v0.3.0 release supports macOS and native Windows, and expects familiarity with git and pull requests. Install it, run oah init in your project, then try the small hello-oah example. The installation and documentation sections explain each step.
oah itself needs no key. Claude Code and Codex sign in on their own, and the optional features that use a key stay off without one. Keys are read only at runtime, from an environment variable or the OS keychain, through one documented lookup; oah never writes, prints or records a key or puts one in a brief.
When you need it
Keys pasted into config files or prompts end up in commits, logs and screenshots, and a leaked key is exposed even if it is deleted a minute later.
How it works
Sign in with each tool's own command: claude auth login, codex login, or printenv OPENAI_API_KEY | codex login --with-api-key.
oah only runs claude auth status and codex login status and reads whether you are signed in.
For a key <NAME>, oah tries the environment variable, then the OS keychain (service oah, account <NAME>: the macOS login keychain, or a Windows Credential Manager generic credential with target oah:<NAME>), then nothing — the feature reports unused(no key).
TYPESAFE_API_KEY is for the Jev re-ranker; CONTEXT7_API_KEY and OPENAI_API_KEY for toolkit MCP servers; in v0.3.0, ARTIFICIAL_ANALYSIS_API_KEY adds optional benchmark scores.
oah init adds .env, .env.*, *.pem, *.key, .oah/secrets* and .claude/settings.local.json to .gitignore.
Example
Store the Jev key in the macOS keychain; the command prompts for the value, so it never lands in shell history.
security add-generic-password -s oah -a TYPESAFE_API_KEY -w
Requirements
Nothing for oah's core: leases, packets, gates, the impact map, the wiki, review and landing work without any key.
Limits and recovery
Without your Claude Code sign-in oah call claude cannot run; without your Codex sign-in oah review and oah fix cannot run.
A key alone never turns the Jev re-ranker on; you must also enable it.
If a key leaks: rotate it at the provider first, then remove it from files and commits, push the cleaned history, and store the new key in your environment or keychain.