Reproducible CI Docker images — build, attest, and share portable images

Modern software teams—an estimated 3.0M engineering teams worldwide—rely increasingly on containerized CI, yet they still build and share ad-hoc Docker images that are hard to reproduce, audit, and verify. That creates slow debugging, fragile pipelines, and growing compliance risk as supply-chain security rules and buyers demand SBOMs and signed artifacts. You could build a developer tool that produces deterministic OCI/Docker images from CI runs, emits SBOMs, posts SLSA/Sigstore-style attestations, and publishes curated, versioned images to major registries with rebuild-verification and layer-caching to keep CI fast. Integrated plugins for GitHub/GitLab runners, a hosted catalog of reproducible base images, and compliance reporting would let teams adopt with minimal workflow change while enabling a $6,000 ACV motion into an $18.0B market (market score 92/100, revenue potential 88/100). This is an attractive moment: mandates for provenance and signed artifacts are accelerating procurement and security interest, more CI runs inside containers, and registries/platforms are standardizing integrations, lowering go-to-market friction. The product could stand out by delivering end-to-end determinism plus attestation and registry-native distribution, but expect real technical challenges (deterministic toolchains, timestamps, package variability), moderate competition from registries and CI vendors, and initial sales friction around trust and key management.