Run MongoDB aggregation pipelines to transform and group documents.
npx skills add https://github.com/theslashdojo/dojo --skill aggregation
Please help me install this Agent Skill. Skill: aggregation Source: https://github.com/theslashdojo/dojo/tree/main/nodes/mongodb/aggregation Command: npx skills add https://github.com/theslashdojo/dojo --skill aggregation
When plain find queries cannot express grouping, joins, reshaping, or multi-stage transformations, this Skill runs MongoDB aggregation pipelines to produce reporting, enrichment, and materialized outputs without manual pipeline orchestration.
Provide a JSON payload or set AGGREGATION_INPUT_JSON with database, collection, and pipeline and run the included node script to execute the aggregation and receive results or an explain plan.
High-intent search queries and answers about installing and using this skill.
Use the explain option to return an execution plan instead of result documents. Running an explain plan helps identify slow stages in the MongoDB aggregation pipeline, guiding optimizations like pushing $match early and keeping $project tight.
Use the allowDiskUse option when your MongoDB aggregation pipeline encounters memory limits during heavy sorting or grouping operations. It permits the pipeline to write temporary data to disk, preventing failures on large datasets.
Yes, MongoDB aggregation pipelines support $merge and $out stages to write transformed documents to target collections. Treat these stages as destructive writes, as they materialize outputs directly into the specified database collections.
Yes, you need the mongodb and bson Node.js drivers installed as dependencies. The Skill executes aggregation pipelines through a Node.js script that relies on these drivers to connect to the database and process Extended JSON input.
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