Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add AzureCosmosDB/cosmosdb-claude-code-plugin --skill cosmosdb-best-practicesgit clone --depth 1 https://github.com/AzureCosmosDB/cosmosdb-claude-code-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/azurecosmosdb/cosmosdb-claude-code-plugin/cosmosdb-best-practices)<a href="https://agentmods.dev/skills/azurecosmosdb/cosmosdb-claude-code-plugin/cosmosdb-best-practices"><img src="https://agentmods.dev/badge/skills/azurecosmosdb/cosmosdb-claude-code-plugin/cosmosdb-best-practices/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/azurecosmosdb/cosmosdb-claude-code-plugin/cosmosdb-best-practices"><img src="https://agentmods.dev/badge/skills/azurecosmosdb/cosmosdb-claude-code-plugin/cosmosdb-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00065 | $0.02462 |
| Opus 5 | $0.00032 | $0.01231 |
| Sonnet 5 | $0.00013 | $0.00492 |
| Haiku 4.5 | $0.00006 | $0.00246 |
Grade A, and why
cosmosdb-best-practices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
95% identical to cosmosdb-best-practices — 1 line differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Azure Cosmos DB Best Practices
Comprehensive performance optimization guide for Azure Cosmos DB applications, containing 73+ rules across 10 categories, prioritized by impact to guide automated refactoring and code generation.
73 individual rule files are in the rules/ directory, one file per rule,
synced from the AzureCosmosDB/cosmosdb-agent-kit.
Load only the relevant rule file(s) when answering a question — do NOT load all files at once.
Run /azure-cosmos-db-assistant:generate-skills to sync with the latest rules from the agent-kit.
When to Apply
Reference these guidelines when:
- Designing data models for Cosmos DB
- Choosing partition keys
- Writing or optimizing queries
- Implementing SDK patterns
- Reviewing code for performance issues
- Configuring throughput and scaling
- Building globally distributed applications
- Implementing vector search and RAG patterns
Rule Index
Rules are grouped by category prefix. For a given question, load files matching
the relevant prefix (e.g., model-*.md for data modeling, sdk-*.md for SDK usage).
See rules/_sections.md for category descriptions.
1. Data Modeling — CRITICAL (prefix: model-)
- model-embed-related.md — Embed related data retrieved together
- model-reference-large.md — Reference data when items grow large
- model-avoid-2mb-limit.md — Keep items well under 2MB limit
- model-id-constraints.md — Follow ID value length and character constraints
- model-nesting-depth.md — Stay within 128-level nesting depth limit
- model-numeric-precision.md — Understand IEEE 754 numeric precision limits
- model-denormalize-reads.md — Denormalize for read-heavy workloads
- model-schema-versioning.md — Version your document schemas
- model-type-discriminator.md — Use type discriminators for polymorphic data
- model-json-serialization.md — Handle JSON serialization correctly
- model-relationship-references.md — Use ID references with transient hydration
What ships with it
60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- rules/_sections.md 2.1 KB
- rules/_template.md 802 B
- rules/global-conflict-resolution.md 4.0 KB
- rules/global-consistency.md 3.7 KB
- rules/global-failover.md 3.7 KB
- rules/global-multi-region.md 3.2 KB
- rules/global-read-regions.md 3.9 KB
- rules/global-zone-redundancy.md 3.5 KB
- rules/index-composite.md 6.0 KB
- rules/index-exclude-unused.md 3.1 KB
- rules/index-lazy-consistent.md 3.1 KB
- rules/index-range-vs-hash.md 3.4 KB
- rules/index-spatial.md 3.1 KB
- rules/model-avoid-2mb-limit.md 2.0 KB
- rules/model-denormalize-reads.md 3.4 KB
- rules/model-embed-related.md 2.5 KB
- rules/model-id-constraints.md 2.9 KB
- rules/model-json-serialization.md 4.0 KB
- rules/model-nesting-depth.md 3.3 KB
- rules/model-numeric-precision.md 3.2 KB
- rules/model-reference-large.md 2.3 KB
- rules/model-relationship-references.md 3.6 KB
- rules/model-schema-versioning.md 2.4 KB
- rules/model-type-discriminator.md 3.5 KB
- rules/monitoring-azure-monitor.md 4.4 KB
- rules/monitoring-diagnostic-logs.md 5.1 KB
- rules/monitoring-latency.md 4.2 KB
- rules/monitoring-ru-consumption.md 4.2 KB
- rules/monitoring-throttling.md 4.4 KB
- rules/partition-20gb-limit.md 2.8 KB
- rules/partition-avoid-hotspots.md 3.4 KB
- rules/partition-hierarchical.md 2.7 KB
- rules/partition-high-cardinality.md 2.2 KB
- rules/partition-key-length.md 2.8 KB
- rules/partition-query-patterns.md 2.7 KB
- rules/partition-synthetic-keys.md 3.8 KB
- rules/pattern-change-feed-materialized-views.md 7.2 KB
- rules/pattern-efficient-ranking.md 5.8 KB
- rules/pattern-service-layer-relationships.md 4.8 KB
- rules/query-avoid-cross-partition.md 2.5 KB
- rules/query-avoid-scans.md 2.5 KB
- rules/query-order-filters.md 2.6 KB
- rules/query-pagination.md 6.2 KB
- rules/query-parameterize.md 2.9 KB
- rules/query-use-projections.md 2.7 KB
- rules/sdk-async-api.md 3.2 KB
- rules/sdk-availability-strategy.md 5.3 KB
- rules/sdk-circuit-breaker.md 8.4 KB
- rules/sdk-connection-mode.md 2.9 KB
- rules/sdk-diagnostics.md 3.6 KB
- rules/sdk-emulator-ssl.md 7.8 KB
- rules/sdk-etag-concurrency.md 8.1 KB
- rules/sdk-excluded-regions.md 4.9 KB
- rules/sdk-java-content-response.md 3.9 KB
- rules/sdk-java-cosmos-config.md 5.9 KB
- rules/sdk-java-spring-boot-versions.md 4.8 KB
- rules/sdk-local-dev-config.md 5.4 KB
- rules/sdk-newtonsoft-dependency.md 3.9 KB
- rules/sdk-preferred-regions.md 3.2 KB
- rules/sdk-retry-429.md 3.7 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 163 lines · 65 tokens per session scan A e82573f17422
cosmosdb-best-practices is a skill published in the GitHub repository AzureCosmosDB/cosmosdb-claude-code-plugin (2 stars, last pushed 2mo ago), licensed MIT. It adds 65 tokens to every session and 2,462 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to cosmosdb-best-practices, differing in 1 line, and is treated as a copy.
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