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 cockroachlabs/cockroachdb-skills --skill designing-multi-region-applicationsgit clone --depth 1 https://github.com/cockroachlabs/cockroachdb-skillsWrote 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/cockroachlabs/cockroachdb-skills/designing-multi-region-applications)<a href="https://agentmods.dev/skills/cockroachlabs/cockroachdb-skills/designing-multi-region-applications"><img src="https://agentmods.dev/badge/skills/cockroachlabs/cockroachdb-skills/designing-multi-region-applications/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/cockroachlabs/cockroachdb-skills/designing-multi-region-applications"><img src="https://agentmods.dev/badge/skills/cockroachlabs/cockroachdb-skills/designing-multi-region-applications.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 | $0.00089 | $0.03391 |
| Opus 5 | $0.00044 | $0.01695 |
| Sonnet 5 | $0.00018 | $0.00678 |
| Haiku 4.5 | $0.00009 | $0.00339 |
Grade A, and why
designing-multi-region-applications 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 11d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- designing-multi-region-applications — 100% identical, 0 lines differ
- designing-multi-region-applications — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 335 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Designing Multi-Region Applications
Guides developers through selecting the right multi-region pattern for their CockroachDB application and implementing it with proper validation. Covers the decision model for choosing between regular regional tables, REGIONAL BY ROW, GLOBAL tables, and manual geo-partitioning, plus a hands-on demo framework for comparing approaches.
Complement to other skills: For transaction design patterns, see designing-application-transactions. For SQL syntax and schema design, see cockroachdb-sql.
When to Use This Skill
- Deciding how to model multi-region read/write behavior in CockroachDB
- Choosing between active-active and active-passive architectures
- Evaluating
REGIONAL BY ROWvs manual geo-partitioning - Understanding
GLOBALtable behavior and trade-offs - Designing for local reads and writes in multiple regions
- Building or presenting a multi-region demo or workshop
- Validating leaseholder placement and zone configurations
- Optimizing cross-region transaction latency
Do not use this skill when the question is only about SQL syntax, indexing, or generic schema design with no multi-region decision involved.
Prerequisites
- Understanding of CockroachDB range architecture and leaseholder concepts
- A multi-region cluster with nodes started using
--locality=region=...,zone=...matching the regions used in the examples below. Without matching localities the DDL errors withregion "..." does not existand constraints like+region=...match no nodes. Quickest path locally:
For long-running clusters, see setting-up-local-cluster and add# 9-node demo with three regions, three AZs each — note --no-example-database cockroach demo --no-example-database --nodes=9 \ --demo-locality=region=NA-NE,az=1:region=NA-NE,az=2:region=NA-NE,az=3:region=NA-MW,az=1:region=NA-MW,az=2:region=NA-MW,az=3:region=EU-DE,az=1:region=EU-DE,az=2:region=EU-DE,az=3--locality=region=...,zone=...to eachcockroach startinvocation. - Knowledge of application write patterns (single-region vs multi-region)
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.
- 11d ago First seen · 335 lines · 89 tokens per session scan A 9f6ef7d95cfd
designing-multi-region-applications is a skill published in the GitHub repository cockroachlabs/cockroachdb-skills (21 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 89 tokens to every session and 3,391 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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