Optimizations
AI agents that continuously optimize your CI workflows
StarSling's AI agents continuously perform deep scans of your workflows and open PRs to optimize your CI speed. See real examples of AI-authored PRs or browse the customer case studies.
AI-powered optimizations are in early access. Join the waitlist to get access.
How It Works
StarSling monitors your CI workflows and identifies opportunities to improve performance, reliability, and efficiency. When an optimization is found, StarSling opens a pull request with the suggested changes and an explanation.
What Gets Optimized
Caching
Detect missing or misconfigured caches and add them automatically.
- Better Auth: fixed a Turborepo cache that wasn't hitting between runs and cached Playwright browser installs.
- Partcl: cached build artifacts across shards.
Dependency installation
Suggest faster install strategies (e.g., frozen lockfiles, parallel installs).
Build steps
Identify redundant or slow steps that can be parallelized or removed.
- Mastra: sharded the E2E kitchen-sink suite across 3 parallel jobs.
- Partcl: parallelized a test suite the team had never had time to split.
Test reliability
Replace fixed sleep calls with real readiness checks and add service healthchecks.
- Mastra: swapped blind sleeps for polling across MongoDB and Chroma and added Docker healthchecks.
- Better Auth: added Docker Compose healthchecks.
Workflow structure
Recommend job splitting, matrix strategies, and dependency ordering.
Runner configuration
Flag suboptimal runner labels or resource usage.
- Partcl: right-sized the heaviest jobs from 64-core down to 8-core machines.
How Optimizations Are Delivered
- StarSling analyzes your workflow runs and configuration
- When an optimization is identified, a PR is opened with the changes
- Each PR includes an explanation of what changed and why
- You review and merge at your own pace
"Within a day of migrating to StarSling Runners, their agents opened up a PR that literally made our Rust CI tests 2x faster!"
— Vamshi Balanaga, Co-founder & CTO, Partcl
See It In Action
Real CI optimizations StarSling agents have shipped, with measured before/after numbers:
Mastra — 6x faster tests
14 agent-authored PRs cut the slowest test suite from ~30m to ~5m and shortened queue time ~8x.
Better Auth — 2x faster E2E
Three agent optimization PRs halved per-job E2E runtime, saving ~20,000 CI minutes per month.
Partcl — 13x cheaper per run
Build caching, test parallelization, and 64→8-core right-sizing made the heaviest CI jobs 13x cheaper and cut queue time 16x.
See all StarSling case studies →.