Our review
This skill enables storage and retrieval of structured data using a CLI tool with flexible schema definitions and namespace-based organization.
Strengths
- Supports flexible, strict, and dynamic schema modes.
- Uses URI-like addressing for data access.
- Provides namespace strategy for multi-project or multi-user separation.
- Allows nested fields and various data types.
Limitations
- Requires installation and setup of the XDB CLI tool.
- Not a full database; may lack advanced querying capabilities.
- Learning curve for URI format and schema modes.
Use when you need a simple, schema-aware CLI tool to persist and organize structured data across projects or agents.
Avoid when you need complex relational queries, transactions, or when data volume exceeds CLI tool capacity.
Security analysis
SafeThe skill provides instructions for using the XDB CLI tool to manage structured data. It does not contain any commands that could be destructive or exfiltrating. The use of Bash and Write is limited to legitimate data management tasks.
No concerns found
Examples
Use xdb to store the scraped page title and URL in namespace agent.scraper, schema pages, with a randomized id. Use flexible mode.Define a strict schema called 'issues' under namespace project.myapp with fields: title (STRING), status (STRING), priority (INTEGER), assignee (STRING). Then create the schema using xdb make-schema.I need to store conversation history for an agent. Use xdb with dynamic mode under namespace agent.memory, schema conversations. Store each user message with a unique id, timestamp, content, and role.name: using-xdb description: Use XDB CLI to store and manage structured data. Use when you need to persist data, create schemas for tracking information (issues, scraped data, metrics, logs), or organize data by namespace for different projects/users/contexts. allowed-tools: Bash(xdb:*), Write
Using XDB CLI for Data Management
Run xdb --help for command syntax and flags.
URI Format
xdb://NAMESPACE/SCHEMA/ID#ATTRIBUTE
| Component | Required | Example |
| --------- | ------------ | --------------------------------------------- |
| Namespace | Yes | agent.scraper, user.john, project.myapp |
| Schema | For data ops | articles, issues, tasks |
| ID | For records | article-123, issue-1 |
| Attribute | Optional | #title, #status, #author.name |
Namespace Strategy
| Pattern | Use Case | Example |
| ---------------- | ------------------- | ----------------------------------- |
| agent.<name> | Agent-specific data | agent.scraper, agent.researcher |
| user.<id> | Per-user data | user.john, user.admin |
| project.<name> | Project data | project.webapp, project.api |
| team.<name> | Team shared data | team.engineering, team.support |
| org.<name> | Organization data | org.acme, org.internal |
Schema Definition Format
Modes:
| Mode | Behavior |
| ---------- | ------------------------------------------------------- |
| flexible | Accepts any attributes (default, no schema file needed) |
| strict | Only allows attributes defined in schema |
| dynamic | Auto-infers and adds new fields from data |
Flexible schema:
xdb make-schema xdb://agent.scraper/articles
Strict or dynamic schema with JSON definition:
{
"name": "Article",
"mode": "strict",
"fields": [
{ "name": "title", "type": "STRING" },
{ "name": "tags", "type": "ARRAY", "array_of": "STRING" },
{
"name": "metadata",
"type": "MAP",
"map_key": "STRING",
"map_value": "STRING"
},
{ "name": "author.name", "type": "STRING" },
{ "name": "author.email", "type": "STRING" }
]
}
Types: STRING, INTEGER, UNSIGNED, FLOAT, BOOLEAN, TIME, BYTES, ARRAY, MAP
Nested fields: Use dot notation (author.name, stats.views)
Nanoid Helper
Generate unique IDs:
nanoid() { openssl rand -base64 12 | tr -dc 'a-zA-Z0-9' | head -c 21; }
Example Use Cases
| Use Case | Mode | Namespace | Schema |
| ------------------- | ---------- | ------------------ | --------------- |
| Web scraping | flexible | agent.scraper | pages |
| Issue tracking | strict | project.<name> | issues |
| Research notes | dynamic | agent.researcher | notes |
| API cache | flexible | agent.api | cache |
| Conversation memory | dynamic | agent.memory | conversations |
| Bookmarks | flexible | user.<id> | bookmarks |
| Code snippets | strict | team.<name> | snippets |
| Meeting notes | dynamic | org.<name> | meetings |
| Error logs | dynamic | project.<name> | errors |
| Feature flags | strict | project.<name> | flags |
Workflow Examples
- Web Scraper Agent - Store scraped pages
- Issue Tracker Agent - Track issues with strict schema
- Metrics Tracking Agent - Time-series metrics
- Multi-User Task Manager - Per-user namespaces
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