# 4d Doc Lookup

> Look up 4D documentation for commands, classes, or language concepts. Use when the user asks about a 4D command's syntax, parameters, or usage, needs class API reference, or wants to understand a 4D language concept. Resolves names to developer.4d.com URLs and optionally fetches page content.

- Skill: `e-marchand/4d-doc-lookup` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add e-marchand/4d-doc-lookup`
- Raw SKILL.md: https://api.skillmd.com/api/skills/e-marchand/4d-doc-lookup/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Docs & Writing
- Author: e-marchand (https://skillmd.com/u/e-marchand)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/e-marchand/4d-doc-lookup

---


# 4D Doc Lookup

Look up documentation from developer.4d.com for commands, classes, and topics.

## Usage

```bash
# Get URL only (fast, no network needed)
python3 scripts/doc_lookup.py "JSON Parse"

# Fetch and extract page content
python3 scripts/doc_lookup.py "collection" --fetch

# Limit extracted text length
python3 scripts/doc_lookup.py "ORDA" --fetch --max-chars 2000
```

## Query Types

The script auto-detects the query type:

| Query | Resolves to | Example URL |
|-------|-------------|-------------|
| Command name | `/commands/<slug>` | `ALERT` → `/commands/alert` |
| Class name | `/API/<ClassName>` | `collection` → `/API/CollectionClass` |
| `4D.File`, `cs.DataStore` | `/API/<ClassName>` | `4D.File` → `/API/FileClass` |
| Topic keyword | `/Concepts/<path>` | `orda` → `/ORDA/overview` |

## Output

```json
{
  "query": "JSON Parse",
  "type": "command",
  "url": "https://developer.4d.com/docs/commands/json-parse"
}
```

With `--fetch`, adds `"content"` field with extracted text.

## Supported Topics

`orda`, `variables`, `methods`, `classes`, `parameters`, `shared`, `error handling`, `data types`, `collections`, `objects`, `forms`, `listbox`, `web server`, `rest`, `compiler`, `components`, `architecture`

## Combining with 4d-find-command

Use `4d-find-command` to discover command names, then `4d-doc-lookup` to get full documentation:

```bash
# Step 1: Find commands
python3 scripts/find_command.py json

# Step 2: Look up specific command
python3 scripts/doc_lookup.py "JSON Parse" --fetch
```