cloudbase-document-database-web-sdk: Data & Analytics for AI Agents | OpenAgentSkill

Overview

Use CloudBase document database Web SDK only for confirmed NoSQL collection work. Query, create, update, and delete document data; if the task mentions PostgreSQL / CloudBase PG / app.rdb(), route to postgresql-development instead.

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Sibling skills (local only)

Sibling CloudBase skills ship beside this skill. Use local relative paths such as ../auth-tool-cloudbase/SKILL.md.

If a referenced sibling skill file is missing from this environment, ask the user to install the full CloudBase plugin (or the missing skill). Do not HTTP-fetch remote skill or protocol markdown into the agent context.

CloudBase Document Database Web SDK

Activation Contract

Use this first when

A browser or Web app must read or write CloudBase document database data through @cloudbase/js-sdk.
The request mentions app.database(), db.collection(), .where(), .watch(), pagination, aggregation, or geolocation queries in a Web frontend.

Read before writing code if

The task is clearly browser-side, but you still need to decide between Web SDK, Mini Program SDK, or backend access.
The request touches login state, collection permissions, or realtime updates.

Then also read

Web login and caller identity -> ../auth-web-cloudbase/SKILL.md
General Web app structure -> ../web-development/SKILL.md
Mini Program database code -> ../cloudbase-document-database-in-wechat-miniprogram/SKILL.md

Do NOT use for

Mini Program code using wx.cloud.database().
Server-side or cloud-function database access.
SQL / MySQL database operations.
Pure resource-permission administration with no browser SDK code.
NEW business tables that the task explicitly asks to put in CloudBase PostgreSQL (CloudBase PG). Before applying this skill, call envQuery(action="info", envId=...) and read EnvInfo.RuntimeBackends. If postgresql === true AND the task asks for a new business table to live in PG, switch to the postgresql-development-cloudbase skill for that table: it goes through app.rdb(), uses PG row-level security (CREATE POLICY), and uploads via app.storage.from('<bucket>').upload('<key>', file) against an explicitly-created pgstore bucket.
- Existing NoSQL collections in the same env keep using THIS skill — PG and NoSQL coexist in CloudBase PG environments. The rule is "follow the task / existing surface", not "PG env forbids NoSQL".

SDK Code vs MCP Tools

When to write SDK code (use this skill):

The task explicitly asks to "modify code" or "use SDK"
The task asks to implement app/frontend logic
The task mentions specific SDK methods like db.collection().add(), .get(), .update()
The context shows an existing Web project with SDK initialization (e.g., index.js already has cloudbase.init())

When to use MCP tools instead:

The task asks to manage CloudBase resources (create collection, set permissions, etc.)
The task involves admin/management operations without writing app code
The task mentions tools like writeNoSqlDatabaseContent, managePermissions, etc.

Key distinction: If the user says "使用 JS SDK 执行 XX 操作" (use JS SDK to perform XX operation) or "修改代码" (modify code), write SDK code in the project files. Do not use MCP database write tools for app-level data operations.

Common mistakes / gotchas

Querying before the user is signed in when the collection rules require identity.
Using wx.cloud.database() or Node SDK patterns in browser code.
Initializing CloudBase lazily with dynamic imports instead of a shared synchronous app instance.
Treating security rules as result filters rather than request validators.
Expecting a CUSTOM security rule to take effect immediately after you call managePermissions(updateResourcePermission). The backend caches rule evaluators for 2–5 minutes; first writes after a rule change may silently fail or be rejected with DATABASE_PERMISSION_DENIED even when the expression is correct. Either (a) wait a few minutes and retry the same write before assuming the rule is wrong, or (b) verify the rule is live by reading result.code / result.message on every write and by doing a get() round-trip on the just-written _id; do not treat a resolved promise as success. See security-rules.md → "Propagation And Verification" for the full pattern.
Misreading the return shape of db.collection(...).add(...). In the CloudBase Web SDK, the created document ID is exposed at top-level result._id, not result.id, result.data.id, or result.insertedId.
For CMS-style collections that need app-level admin users to edit/delete all records while editors can only edit/delete their own records, do not oversimplify the rule to READONLY. A validated pattern is a CUSTOM rule that reads role from user_roles by auth.uid and combines it with doc.authorId == auth.uid, while frontend writes can stay on .doc(id).update() / .doc(id).remove().
Forgetting pagination or indexes for larger collections.

Minimal checklist

Confirm this is browser-side document database work.
Initialize CloudBase once and reuse the same app / db instance.
Verify auth expectations before CRUD.
Read the right companion reference file for the specific operation.

Overview

This skill covers browser-side document database usage via @cloudbase/js-sdk.

Use it for:

CRUD in a Web app
complex queries and pagination
aggregation
realtime listeners with watch()
geolocation queries

Canonical initialization

import cloudbase from "@cloudbase/js-sdk";

const app = cloudbase.init({
  env: "your-env-id"
});

const db = app.database();
const _ = db.command;

Important rules:

Sign in before querying if the collection rules require identity.
Keep a single shared app/database instance.
Do not hide initialization inside ad-hoc async loaders unless the framework truly requires it.

Quick routing

CRUD -> ./crud-operations.md
Complex queries -> ./complex-queries.md
Pagination -> ./pagination.md
Aggregation -> ./aggregation.md
Realtime listeners -> ./realtime.md
Geolocation -> ./geolocation.md
Security rules -> ./security-rules.md

Working rules for a coding agent

Start from the auth model
- If the page relies on logged-in user identity, read the Web auth skill before writing database code.
Keep browser code browser-native
- Use app.database() and collection references.
- Do not mix in MCP management flows or SQL mental models.
Respect security rules
- Collection rules can reject requests before data is read.
- If the requirement is simple owner-only write access, READONLY can be enough.
- If the requirement is “app-level admin can edit/delete all, editor only own”, use a CUSTOM rule. A validated CMS pattern is get('database.user_roles.' + auth.uid).role == 'admin' || doc.authorId == auth.uid.
- For that CMS pattern, frontend writes can stay on .doc(id).update() / .doc(id).remove().
- Reuse whichever role collection already exists and can be addressed by _id == auth.uid. In this CMS pattern, user_roles keyed by uid is acceptable.
- If the task fails with permission issues, inspect the rule model rather than assuming the query syntax is wrong.
Return user-friendly errors
- Database errors must become readable UI or application errors, not silent failures.
- For writes, do not treat a resolved promise as success by default. Check write result fields such as updated / deleted or surfaced code / message.
Persist IDs from create operations correctly
- For Web SDK .add(...), the newly created document ID is result._id.
- Do not look for the ID under result.id, result.data, or other driver-specific fields.

Quick examples

Simple query

const result = await db.collection("todos")
  .where({ completed: false })
  .get();

Create and capture document ID

const result = await db.collection("posts").add({
  title: "New article",
  content: "...",
  createdAt: new Date()
});

const articleId = result._id;

Ordered pagination

const result = await db.collection("posts")
  .orderBy("createdAt", "desc")
  .skip(20)
  .limit(10)
  .get();

Field selection

const result = await db.collection("users")
  .field({ name: true, email: true, _id: false })
  .get();

Best practices

Define collection-level types or model wrappers in the app code.
Use meaningful collection naming conventions.
Select only required fields.
Add indexes for frequent filters or sort keys.
Pair frontend CRUD with explicit permission design.
Use pagination instead of unbounded reads.

Error handling

try {
  const result = await db.collection("todos").get();
  console.log(result.data);
} catch (error) {
  console.error("Database error:", error);
}

When the SDK returns an operation result, check error indicators and translate them into readable application behavior.

View source ↗

File metadata

name: cloudbase-document-database-web-sdk
description: Use CloudBase document database Web SDK only for confirmed NoSQL collection work. Query, create, update, and delete document data; if the task mentions PostgreSQL / CloudBase PG / app.rdb(), route to postgresql-development instead.
version: 2.33.2
alwaysApply: false

View original text

---
name: cloudbase-document-database-web-sdk
description: Use CloudBase document database Web SDK only for confirmed NoSQL collection work. Query, create, update, and delete document data; if the task mentions PostgreSQL / CloudBase PG / app.rdb(), route to postgresql-development instead.
version: 2.33.2
alwaysApply: false
---

## Sibling skills (local only)

Sibling CloudBase skills ship beside this skill. Use local relative paths such as `../auth-tool-cloudbase/SKILL.md`.

If a referenced sibling skill file is missing from this environment, ask the user to install the full CloudBase plugin (or the missing skill). Do **not** HTTP-fetch remote skill or protocol markdown into the agent context.

# CloudBase Document Database Web SDK

## Activation Contract

### Use this first when

- A browser or Web app must read or write CloudBase document database data through `@cloudbase/js-sdk`.
- The request mentions `app.database()`, `db.collection()`, `.where()`, `.watch()`, pagination, aggregation, or geolocation queries in a Web frontend.

### Read before writing code if

- The task is clearly browser-side, but you still need to decide between Web SDK, Mini Program SDK, or backend access.
- The request touches login state, collection permissions, or realtime updates.

### Then also read

- Web login and caller identity -> `../auth-web-cloudbase/SKILL.md`
- General Web app structure -> `../web-development/SKILL.md`
- Mini Program database code -> `../cloudbase-document-database-in-wechat-miniprogram/SKILL.md`

### Do NOT use for

- Mini Program code using `wx.cloud.database()`.
- Server-side or cloud-function database access.
- SQL / MySQL database operations.
- Pure resource-permission administration with no browser SDK code.
- **NEW business tables that the task explicitly asks to put in CloudBase PostgreSQL (CloudBase PG).** Before applying this skill, call `envQuery(action="info", envId=...)` and read `EnvInfo.RuntimeBackends`. If `postgresql === true` AND the task asks for a new business table to live in PG, switch to the `postgresql-development-cloudbase` skill for that table: it goes through `app.rdb()`, uses PG row-level security (`CREATE POLICY`), and uploads via `app.storage.from('<bucket>').upload('<key>', file)` against an explicitly-created pgstore bucket.
  - Existing NoSQL collections in the same env keep using THIS skill — PG and NoSQL coexist in CloudBase PG environments. The rule is "follow the task / existing surface", not "PG env forbids NoSQL".

### SDK Code vs MCP Tools

**When to write SDK code (use this skill):**
- The task explicitly asks to "modify code" or "use SDK"
- The task asks to implement app/frontend logic
- The task mentions specific SDK methods like `db.collection().add()`, `.get()`, `.update()`
- The context shows an existing Web project with SDK initialization (e.g., `index.js` already has `cloudbase.init()`)

**When to use MCP tools instead:**
- The task asks to manage CloudBase resources (create collection, set permissions, etc.)
- The task involves admin/management operations without writing app code
- The task mentions tools like `writeNoSqlDatabaseContent`, `managePermissions`, etc.

**Key distinction:** If the user says "使用 JS SDK 执行 XX 操作" (use JS SDK to perform XX operation) or "修改代码" (modify code), write SDK code in the project files. Do not use MCP database write tools for app-level data operations.

### Common mistakes / gotchas

- Querying before the user is signed in when the collection rules require identity.
- Using `wx.cloud.database()` or Node SDK patterns in browser code.
- Initializing CloudBase lazily with dynamic imports instead of a shared synchronous app instance.
- Treating security rules as result filters rather than request validators.
- **Expecting a `CUSTOM` security rule to take effect immediately after you call `managePermissions(updateResourcePermission)`.** The backend caches rule evaluators for **2–5 minutes**; first writes after a rule change may silently fail or be rejected with `DATABASE_PERMISSION_DENIED` even when the expression is correct. Either (a) wait a few minutes and retry the same write before assuming the rule is wrong, or (b) verify the rule is live by reading `result.code` / `result.message` on every write and by doing a `get()` round-trip on the just-written `_id`; do not treat a resolved promise as success. See `security-rules.md` → "Propagation And Verification" for the full pattern.
- Misreading the return shape of `db.collection(...).add(...)`. In the CloudBase Web SDK, the created document ID is exposed at top-level `result._id`, not `result.id`, `result.data.id`, or `result.insertedId`.
- For CMS-style collections that need **app-level admin users** to edit/delete all records while editors can only edit/delete their own records, do not oversimplify the rule to `READONLY`. A validated pattern is a `CUSTOM` rule that reads role from `user_roles` by `auth.uid` and combines it with `doc.authorId == auth.uid`, while frontend writes can stay on `.doc(id).update()` / `.doc(id).remove()`.
- Forgetting pagination or indexes for larger collections.

### Minimal checklist

- Confirm this is browser-side document database work.
- Initialize CloudBase once and reuse the same `app` / `db` instance.
- Verify auth expectations before CRUD.
- Read the right companion reference file for the specific operation.

## Overview

This skill covers **browser-side document database usage** via `@cloudbase/js-sdk`.

Use it for:

- CRUD in a Web app
- complex queries and pagination
- aggregation
- realtime listeners with `watch()`
- geolocation queries

## Canonical initialization

```javascript
import cloudbase from "@cloudbase/js-sdk";

const app = cloudbase.init({
  env: "your-env-id"
});

const db = app.database();
const _ = db.command;
```

Important rules:

- Sign in before querying if the collection rules require identity.
- Keep a single shared app/database instance.
- Do not hide initialization inside ad-hoc async loaders unless the framework truly requires it.

## Quick routing

- CRUD -> `./crud-operations.md`
- Complex queries -> `./complex-queries.md`
- Pagination -> `./pagination.md`
- Aggregation -> `./aggregation.md`
- Realtime listeners -> `./realtime.md`
- Geolocation -> `./geolocation.md`
- Security rules -> `./security-rules.md`

## Working rules for a coding agent

1. **Start from the auth model**
   - If the page relies on logged-in user identity, read the Web auth skill before writing database code.

2. **Keep browser code browser-native**
   - Use `app.database()` and collection references.
   - Do not mix in MCP management flows or SQL mental models.

3. **Respect security rules**
   - Collection rules can reject requests before data is read.
   - If the requirement is simple owner-only write access, `READONLY` can be enough.
   - If the requirement is “app-level admin can edit/delete all, editor only own”, use a `CUSTOM` rule. A validated CMS pattern is `get('database.user_roles.' + auth.uid).role == 'admin' || doc.authorId == auth.uid`.
   - For that CMS pattern, frontend writes can stay on `.doc(id).update()` / `.doc(id).remove()`.
   - Reuse whichever role collection already exists and can be addressed by `_id == auth.uid`. In this CMS pattern, `user_roles` keyed by uid is acceptable.
   - If the task fails with permission issues, inspect the rule model rather than assuming the query syntax is wrong.

4. **Return user-friendly errors**
   - Database errors must become readable UI or application errors, not silent failures.
   - For writes, do not treat a resolved promise as success by default. Check write result fields such as `updated` / `deleted` or surfaced `code` / `message`.

5. **Persist IDs from create operations correctly**
   - For Web SDK `.add(...)`, the newly created document ID is `result._id`.
   - Do not look for the ID under `result.id`, `result.data`, or other driver-specific fields.

## Quick examples

### Simple query

```javascript
const result = await db.collection("todos")
  .where({ completed: false })
  .get();
```

### Create and capture document ID

```javascript
const result = await db.collection("posts").add({
  title: "New article",
  content: "...",
  createdAt: new Date()
});

const articleId = result._id;
```

### Ordered pagination

```javascript
const result = await db.collection("posts")
  .orderBy("createdAt", "desc")
  .skip(20)
  .limit(10)
  .get();
```

### Field selection

```javascript
const result = await db.collection("users")
  .field({ name: true, email: true, _id: false })
  .get();
```

## Best practices

1. Define collection-level types or model wrappers in the app code.
2. Use meaningful collection naming conventions.
3. Select only required fields.
4. Add indexes for frequent filters or sort keys.
5. Pair frontend CRUD with explicit permission design.
6. Use pagination instead of unbounded reads.

## Error handling

```javascript
try {
  const result = await db.collection("todos").get();
  console.log(result.data);
} catch (error) {
  console.error("Database error:", error);
}
```

When the SDK returns an operation result, check error indicators and translate them into readable application behavior.

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

License: MIT

Dependency or permission surface needs review
Permission surface may require sandboxing
Low GitHub adoption signal
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
GitHub adoption: 32 GitHub stars
Stars/forks activity: 32 stars, 2 forks; issue activity unavailable in current metadata
Dependency/runtime risk: credential or environment access, network or browser surface
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Open full audit

Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.

Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3

Source & usage notes

IndexedStatic Checked

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: TencentCloudBase/cloudbase-skills
License: MIT
Version: 2.33.2
Last GitHub push: Sep 11, 2026
Registry updated: Sep 11, 2026
Instruction path: skills/cloudbase/references/cloudbase-document-database-web-sdk/SKILL.md @ e670a60e406c

Version reported in registry metadata; check source releases before relying on it.

Quality

56/100

Promising

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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      "Low GitHub adoption signal",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "GitHub adoption: 32 GitHub stars",
      "Stars/forks activity: 32 stars, 2 forks; issue activity unavailable in current metadata",
      "Dependency/runtime risk: credential or environment access, network or browser surface",
      "Permission surface: secrets or environment access, shell or command execution"
    ]
  },
  "agent_proven": {
    "version": "agent-proven-v1",
    "score": 0,
    "tier": "unproven",
    "label": "Needs first agent run",
    "summary": "No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.",
    "metrics": {
      "totalOutcomes": 0,
      "successfulOutcomes": 0,
      "failedOutcomes": 0,
      "installAttempts": 0,
      "installSuccessRate": null,
      "successRate": null,
      "recentSuccessRate": null,
      "recentFailureRate": null,
      "riskBlocked": 0,
      "setupRequired": 0,
      "notRelevant": 0,
      "avgOutputQuality": null,
      "avgTimeToUsefulMs": null,
      "productionOutcomes": 0,
      "humanReviewRequired": 0,
      "uniqueAgents": 0,
      "lastOutcomeAt": null
    },
    "signals": [],
    "penalties": [
      "No real agent outcome evidence yet"
    ]
  },
  "audit": {
    "score": 72,
    "risk_level": "needs_review",
    "risk_label": "Needs review",
    "warnings": [
      "Dependency or permission surface needs review",
      "Permission surface may require sandboxing",
      "Low GitHub adoption signal",
      "AI review approval is missing",
      "Quality score needs review",
      "Permission surface needs review: secrets or environment access, shell or command execution",
      "GitHub adoption: 32 GitHub stars",
      "Stars/forks activity: 32 stars, 2 forks; issue activity unavailable in current metadata"
    ]
  },
  "safety_gate": {
    "tier": "blocked",
    "label": "Blocked for auto-install",
    "auto_install_policy": "block",
    "auto_install_allowed": false,
    "human_review_required": true,
    "blocked": true,
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
  },
  "quality": {
    "score": 56,
    "label": "Promising"
  },
  "supply": {
    "track": "Research and knowledge work",
    "scenario": "RAG and knowledge",
    "maintenance": "6d since push",
    "risk": "Needs review"
  },
  "alternative_skills": [],
  "do_not_use_when": [
    "teams that need a vendor-supported SLA",
    "production agents without a repository review",
    "Low GitHub adoption signal",
    "No OpenAgentSkill engagement data yet",
    "High-risk permission hints: Shell or command execution, Secrets or environment access",
    "Dependency or permission surface needs review",
    "Permission surface may require sandboxing",
    "AI review approval is missing"
  ],
  "agent_contract": {
    "task_input": "Use cloudbase-document-database-web-sdk in an agent workflow",
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
    "install_policy": "block",
    "minimum_review_before_use": [
      "Trust: 69/100 Manual review",
      "Audit: 72/100 Needs review",
      "Safety: 24/100 Avoid automatic install",
      "Review repository, license, install command, and permission surface before production use."
    ],
    "expected_agent_output": {
      "selected_skill": "tencentcloudbase-cloudbase-document-database-web-sdk (cloudbase-document-database-web-sdk)",
      "install_command": "npx skills add TencentCloudBase/cloudbase-skills --skill cloudbase-document-database-web-sdk",
      "risk_summary": "Needs review; Blocked for auto-install; Review before production",
      "verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
    }
  },
  "outcome_feedback": {
    "endpoint": "https://www.openagentskill.com/api/agent/outcome",
    "method": "POST",
    "requires_resolve_event_id": true,
    "event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
    "expected_outcomes": [
      "success",
      "failed",
      "not_relevant",
      "blocked_by_risk",
      "setup_required"
    ],
    "payload_template": {
      "event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
      "skill_slug": "tencentcloudbase-cloudbase-document-database-web-sdk",
      "task": "Use cloudbase-document-database-web-sdk in an agent workflow",
      "agent": "codex",
      "outcome": "success",
      "install_used": true,
      "risk_blocked": false,
      "setup_required": false,
      "task_success": true,
      "output_quality": 4,
      "error_type": null,
      "human_review_required": false,
      "workspace": "sandbox",
      "time_to_useful_ms": 120000,
      "notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
    }
  },
  "endpoints": {
    "web": "https://www.openagentskill.com/skills/tencentcloudbase-cloudbase-document-database-web-sdk",
    "api": "https://www.openagentskill.com/api/agent/skills/tencentcloudbase-cloudbase-document-database-web-sdk",
    "audit": "https://www.openagentskill.com/skills/tencentcloudbase-cloudbase-document-database-web-sdk/audit",
    "eval": "https://www.openagentskill.com/api/agent/evals?slug=tencentcloudbase-cloudbase-document-database-web-sdk&task=Use%20cloudbase-document-database-web-sdk%20in%20an%20agent%20workflow&max_risk=medium",
    "resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20cloudbase-document-database-web-sdk%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
    "receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20cloudbase-document-database-web-sdk%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
    "install": "https://www.openagentskill.com/api/skills/tencentcloudbase-cloudbase-document-database-web-sdk/install",
    "manifest": "https://www.openagentskill.com/api/registry/manifest/tencentcloudbase-cloudbase-document-database-web-sdk"
  }
}

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Creator: TencentCloudBase
Source: TencentCloudBase/cloudbase-skills
Indexed by: OpenAgentSkill community index

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Overview

Sibling skills (local only)

CloudBase Document Database Web SDK

Activation Contract

Use this first when

Read before writing code if

Then also read

Do NOT use for

SDK Code vs MCP Tools

Common mistakes / gotchas

Minimal checklist

Overview

Canonical initialization

Quick routing

Working rules for a coding agent

Quick examples

Simple query

Create and capture document ID

Ordered pagination

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Review the source

Start with one small task

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