The original title is: "Block the merge when a PR ships a vulnerability: a CI security gate with Synapse"

Short summary

This tutorial shows how to set up a CI security gate using Synapse, an open-source Go-based security scanner, to block pull requests that introduce high-severity vulnerabilities. The setup runs three static binaries (synapse-cli, syft, grype) with no database or server, scans for SCA, SAST, secrets, and misconfigurations, and emits SARIF reports for GitHub Code scanning. A complete GitHub Actions workflow is provided that gates merges on high-severity findings and posts a remediation summary comment on the PR.

• •Synapse CLI gates PR merges on high-severity findings across SCA, SAST, secrets, and misconfigs
• •Single static Go binary with no database or server required; works offline with --offline flag
• •Full GitHub Actions workflow included: scans, uploads SARIF, posts severity breakdown comment on PR

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