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How to run your first Codex Security scan
TL;DR
Codex Security combines an IDE plugin and a CLI to scan repositories, triage vulnerabilities, generate fixes, and push remediation into GitHub and CI/CD workflows.
KEY POINTS
Plugin setup and access
Deployment begins by confirming access to Daybreak Blue in the development environment, then installing the Codex Security plugin from the plugins menu. Once enabled, the plugin exposes security-focused skills including finding triage and deep scan options.
Repository-level scanning
A new scan starts by selecting a locally staged repository, choosing the Daybreak Blue model, and setting the desired reasoning level. Users can also enable extra analysis context to steer the review toward a specific area of the application, such as the authentication service, to improve the relevance of results.
How the analysis works
The scan first prepares context about the repository and codebase, then builds a threat model to identify likely attack surfaces. From there, it reviews code, develops candidate findings, and narrows them into a list of vulnerabilities requiring action.
Finding details and evidence
Each identified issue is presented with a summary, an attack path, and supporting evidence. That structure is intended to help engineering teams understand both the technical cause of the vulnerability and its potential impact on the wider codebase before deciding on remediation.
Automated fix generation
The plugin can generate a patch directly from a finding. That process opens a new Codex thread, passes in the vulnerability context, and uses a fix-generation workflow to propose code changes, including in the example shown the addition of new authorization parameters.
Publishing remediation to GitHub
After reviewing the proposed changes locally, the fix can be published directly to GitHub as a pull request. The pull request then enters the standard review and merge process, allowing teams to move from detection to production remediation inside their existing engineering workflow.
Local analysis before broader rollout
Initial analysis is performed locally and one repository at a time, which suits testing and targeted reviews. That local-first approach allows teams to validate findings and fixes before rolling the process out more broadly across larger code portfolios.
CLI for automation and scale
For multi-repository coverage and automated pipelines, the Codex Security CLI provides a portable option that can be installed with npm. Running a scan from the command line executes the same core workflow seen in the plugin, while also allowing findings to be reviewed and triaged in terminal-based environments.
Use in CI/CD infrastructure
The CLI is designed to be embedded in automation tooling, especially CI/CD systems. That makes it possible to standardize security testing across repositories and run repeatable scans as part of routine software delivery rather than relying only on manual, workstation-based checks.
CONCLUSION
The main value of Codex Security lies in linking vulnerability discovery, fix generation, and workflow automation in one process. By pairing local repository scans with a CLI for CI/CD integration, it aims to make application security more continuous and scalable.
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