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npx skills add ...
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SKILL.md
npx skills add vercel-labs/dev3000 --skill analyze-bundle
Convert Next.js bundle analyzer data to NDJSON and explore it
npx skills add vercel-labs/dev3000 --skill analyze-bundle
Converts Next.js bundle analyzer binary .data files into grep/jq-friendly NDJSON.
This workflow pre-generates analyzer artifacts in:
.next/diagnostics/analyze/ndjson/routes.ndjson.next/diagnostics/analyze/ndjson/sources.ndjson.next/diagnostics/analyze/ndjson/output_files.ndjson.next/diagnostics/analyze/ndjson/module_edges.ndjson.next/diagnostics/analyze/ndjson/modules.ndjsonFocus on reading these files and using their evidence to prioritize changes.
| File | What's in it |
|---|---|
modules.ndjson | Global module registry (id, ident, path) |
module_edges.ndjson | Module dependency graph (from, to, kind: sync/async) |
sources.ndjson | Per-route source tree with sizes and environment flags |
chunk_parts.ndjson | Granular size data: one line per (source, output_file) pair |
output_files.ndjson | Per-route output files with aggregated sizes |
routes.ndjson | Route-level summaries |
grep '"client":true' .next/diagnostics/analyze/ndjson/sources.ndjson \
| grep '"js":true' \
| jq -s 'sort_by(-.compressed_size) | .[0:10] | .[] | {full_path, compressed_size}'grep '"from":42,' .next/diagnostics/analyze/ndjson/module_edges.ndjson | jq .to
grep '"to":42,' .next/diagnostics/analyze/ndjson/module_edges.ndjson | jq .from
grep 'react-dom' .next/diagnostics/analyze/ndjson/modules.ndjson | jq '{id, path}'grep '"route":"/"' .next/diagnostics/analyze/ndjson/output_files.ndjson \
| jq -s 'sort_by(-.total_compressed_size) | .[0:10] | .[] | {filename, total_compressed_size, num_parts}'grep '"route":"/"' .next/diagnostics/analyze/ndjson/sources.ndjson \
| jq 'select(.parent_id == null)'