I built this after repeatedly getting bitten by “small prompt/model tweaks” that silently broke structured JSON outputs in agents/tools. Promptguard’s v0 is focused on strict JSON + JSON Schema validation in GitHub Actions.

I’m validating demand and would love feedback on what matters most next: PR comments vs only Actions summary baselines/diffs (“this PR regressed from last known good”) schema-at-path (validate a nested field) / streaming JSON support support for other runners (GitLab) and local models