jq for JSON Processing
SkillDev toolsUsing jq to parse, filter, and aggregate JSON data from CLI tools for generating reports.
Available today. Use it from your connected AI after setup.
No other account needed.
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Then ask your AI: use the jq for JSON Processing skill
What this skill tells your AI
The instructions your AI receives, as published by cxcscmu/skilllearnbench in skills/b1-one-shot-claude-opus-4-6/github-repo-analytics/jq-processing/SKILL.md and read by ahel’s review.
Basics
jq '.'- pretty-print JSONjq '.field'- extract a fieldjq 'length'- count array elementsjq '[.[] | select(.cond)]'- filter arrays
Date Handling
# Parse ISO 8601 date to epoch
echo '"2024-12-15T10:30:00Z"' | jq 'fromdateiso8601'
# Compute difference in days between two dates
jq -n '("2024-12-20T00:00:00Z" | fromdateiso8601) - ("2024-12-15T00:00:00Z" | fromdateiso8601) | . / 86400'
# Output: 5
Rounding
# Round to 1 decimal place
jq -n '3.14159 * 10 | round / 10'
# Output: 3.1
Building Final JSON
jq -n \
--argjson pr_total 50 \
--argjson pr_merged 40 \
--arg top "user1" \
'{
pr: { total: $pr_total, merged: $pr_merged, top_contributor: $top }
}'
Label Matching (substring check)
# Check if any label name contains "bug" (case-insensitive)
echo "$issues_json" | jq '
[.[] | select(.labels | any(.name | test("bug"; "i")))]
'
Signals
- GitHub stars
- 83
- Forks
- 5
- Last commit
- Jul 2026
Advanced
- Catalog kind
- skill
- Gateway key
jq-processing- Source
- github.com/cxcscmu/skilllearnbench