Practical guide

Install Codex CLI

The objective is to set up Codex CLI reproducibly with minimal permissions. The review baseline covers official install, version, workspace, sandbox and approval mode.

WERKVERSTAND / CONNECTING INTELLIGENCE

The essential answer

A reproducible Codex CLI setup records the installation source, version, workspace and approval mode. Start in an isolated project and check permissions against a small task. Derive additional access from actual requirements.

01 / FIT

A good fit when

  • Goal, scope and domain accountability are explicit.
  • The review baseline is available: official install, version, workspace, sandbox and approval mode.
  • The installation record and a bounded CLI run show which version operates in the correct workspace and when approval is required. Changes and tests are reviewable afterwards.

02 / LIMITS

Not the first choice when

  • Avoid: global full access before an isolated test. Global full access obscures whether the task works with the intended minimum permissions and is not a suitable basis for the first test.
  • There is neither safe test data nor a manual fallback.
  • A product demo is expected to replace domain acceptance.

Prepare installation and permissions

The work assignment is to set up Codex CLI reproducibly with minimal permissions. Define purpose, owner and permitted operating boundary before the first test.

The domain review baseline covers official install, version, workspace, sandbox and approval mode. Assumptions and missing information remain visible in the result.

Test in a bounded environment

  • Check the official installation instructions and record the installation method and version.
  • Prepare an isolated workspace with a known test task and read its project rules.
  • Configure sandboxing and approval mode for the test and run the bounded assignment.
  • Review requested permissions, file changes and test output before expanding usage.

Accept setup and operations

The installation record and a bounded CLI run show which version operates in the correct workspace and when approval is required. Changes and tests are reviewable afterwards.

Avoid: global full access before an isolated test. Global full access obscures whether the task works with the intended minimum permissions and is not a suitable basis for the first test.

Decision matrix

Decision pointProceed whenStop when
Working environmentDocumented: official install, version, workspace, sandbox and approval mode.Scope, data or accountability remains unresolved.
Isolated functional testThe installation record and a bounded CLI run show which version operates in the correct workspace and when approval is required. Changes and tests are reviewable afterwards.There is only an unevaluated demo without acceptance evidence.
Operational readinessOwner, approval, fallback and next review date are defined.Avoid: global full access before an isolated test. Global full access obscures whether the task works with the intended minimum permissions and is not a suitable basis for the first test.

Keep it verifiable

Primary sources

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