Docker Build Output: 50 Lines You Don't Need

Docker builds are verbose by design. Layer IDs, download progress bars, sha256 hashes, cache status for every step. When you run docker build inside Claude Code, all of that goes into the context window. A typical multi-stage build produces 80-120 lines of output. Maybe 10 of those lines matter — the actual build errors or the final image tag. Before: Raw Docker Build [+] Building 45.2s (12/12) FINISHED => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 1.2kB 0.0s => [internal] load metadata for docker.io/library/node:20-alpine 1.2s => [internal] load .dockerignore 0.0s => [build 1/6] FROM docker.io/library/node:20-alpine@sha256:abc123 0.0s => CACHED [build 2/6] WORKDIR /app 0.0s => [build 3/6] COPY package*.json ./ 0.1s => [build 4/6] RUN npm ci --production 32.1s => [build 5/6] COPY . . 0.3s => [build 6/6] RUN npm run build 8.2s => [stage-1 1/3] COPY --from=build /app/dist ./dist 0.1s => [stage-1 2/3] COPY --