improvement(runners): added blacksmith optimizations to workflows and dockerfiles to enhance performance

[waleedlatif1]

Summary

added blacksmith optimizations to workflows and dockerfiles to enhance performance. please review before pushing to production

Type of Change

• Other: Performance

Testing

Tested manually

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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Project	Deployment	Preview	Comments	Updated (UTC)
docs	Ready	Preview	Comment	Nov 19, 2025 8:59pm

[greptile-apps]

Greptile Summary

• Added Blacksmith runner optimizations including Docker build cache configuration (cache-from/cache-to) for workflows and Bun dependency caching across CI/CD pipelines
• Restructured Dockerfiles to optimize layer caching by reordering COPY commands to place frequently-changing files last and removing duplicate dependency installations

Confidence Score: 4/5

• This PR is safe to merge with minor optimization opportunities
• Score reflects well-structured performance optimizations with proper caching strategies; minor improvement possible for empty cache-from handling on staging branch
• Pay attention to .github/workflows/ci.yml and .github/workflows/images.yml for cache-from configuration on staging branch

Important Files Changed

Filename	Overview
.github/workflows/ci.yml	Added Docker build cache configuration with cache-from and cache-to for AMD64 and ARM64 builds
.github/workflows/images.yml	Added Docker build cache configuration with cache-from and cache-to for AMD64 and ARM64 builds
docker/app.Dockerfile	Optimized layer caching by reordering COPY commands and removing duplicate bun install in builder stage

Sequence Diagram

sequenceDiagram
    participant Dev as "Developer"
    participant GH as "GitHub Actions"
    participant Cache as "Registry Cache"
    participant ECR as "Amazon ECR"
    participant GHCR as "GitHub Container Registry"
    
    Dev->>GH: "Push to main/staging"
    GH->>GH: "Run test-build workflow"
    GH->>Cache: "Cache Bun dependencies"
    GH->>GH: "Build AMD64 images"
    GH->>Cache: "Pull cache-from registry"
    GH->>ECR: "Push images with tag (latest/staging)"
    GH->>GHCR: "Push AMD64 images (main only)"
    GH->>Cache: "Save cache-to inline"
    
    alt Main branch only
        GH->>GH: "Build ARM64 images"
        GH->>Cache: "Pull cache-from registry"
        GH->>GHCR: "Push ARM64 images"
        GH->>Cache: "Save cache-to inline"
        GH->>GHCR: "Create multi-arch manifests"
    end
    
    GH->>GH: "Deploy to Trigger.dev"
    GH->>GH: "Process docs embeddings"

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[greptile-apps]

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