# Cosmosdb Indexing

> Azure Cosmos DB indexing strategy best practices: excluding unused paths, composite indexes for ORDER BY, spatial indexes, index types, path syntax, and indexing modes (consistent vs lazy). USE FOR: Cosmos DB indexing policy, exclude paths, composite index, spatial index, index path syntax /? /* /[], range vs hash index, lazy vs consistent indexing, index direction, write overhead reduction. DO NOT USE FOR: query optimization (use cosmosdb-query-optimization), full-text search indexes (use cosmosdb-full-text-search), vector indexes (use cosmosdb-vector-search).

- Skill: `atc-net/cosmosdb-indexing` (Agent Skill, multi-file: 8 files)
- Install (CLI): `npx skillmds@latest add atc-net/cosmosdb-indexing`
- Raw SKILL.md: https://api.skillmd.com/api/skills/atc-net/cosmosdb-indexing/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: atc-net (https://skillmd.com/u/atc-net)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/atc-net/cosmosdb-indexing

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# Azure Cosmos DB Indexing Strategies

Best practices for configuring indexing policies in Azure Cosmos DB.

## When to Apply

Reference these guidelines when:
- Configuring indexing policies
- Adding composite indexes for multi-field ORDER BY
- Optimizing write costs by excluding unused paths
- Setting up spatial indexes for geo queries

## Rules

- [index-exclude-unused](references/index-exclude-unused.md) - Exclude paths never queried
- [index-path-syntax](references/index-path-syntax.md) - Use correct path notation
- [index-composite](references/index-composite.md) - Use composite indexes for ORDER BY
- [index-composite-direction](references/index-composite-direction.md) - Match composite index directions
- [index-spatial](references/index-spatial.md) - Add spatial indexes for geo queries
- [index-range-vs-hash](references/index-range-vs-hash.md) - Choose appropriate index types
- [index-lazy-consistent](references/index-lazy-consistent.md) - Understand indexing modes