aurelienclere-365/d365fo-cowork-plugin/d365fo-enum-edt

D365FO Enum & EDT Discovery

Find the right Extended Data Type or enum before creating a new one. Avoids duplicate types and ensures new fields inherit correct formatting, labels, and validation.

When to use

• User needs an EDT for a new table field and wants to reuse an existing type
• User wants to check if an enum value or enum type already exists before adding one
• User wants to understand the EDT hierarchy (base types, parent EDTs)
• User is scaffolding a new field on a table extension and needs the correct type
• User wants to generate a new EDT or enum skeleton from the CLI

Workflow

1. Identify the business concept. Extract the data concept (e.g. "reference number",

"approval status", "percentage") from the question.

1. Search for existing EDTs. Call search_edts(query) with the concept keywords.

If results are sparse, try synonyms (e.g. "Ref", "Id", "Pct").

1. Get EDT details. Call get_edt_details(edtName) for the most relevant hits:

base type, string length, extends chain, and which tables already use it.

1. Use suggest_edt if unsure. Call suggest_edt(fieldDescription) — the CLI ranks

candidate EDTs by semantic similarity. Present the top 3 with their base types.

1. Search enums if the field is a fixed-value list. Call search_enums(query) then

get_enum_details(enumName) to see all defined values.

1. Recommend or scaffold.

• If a suitable EDT/enum exists: recommend it with justification.
• If none fits: describe what a new type should extend and suggest calling

generate_edt(name, baseType, extends) or generate_enum(name, values[]).

Output Format

EDT recommendation

Enum values

Notes

• Always prefer reusing an existing EDT over creating a new one — it inherits the label,

help text, string length, and extends chain automatically.

• For amounts: use an EDT that extends AmountMST or Amount (Real base type).
• For quantities: extend Qty (Real).
• For dates: extend TransDate (Date).
• For free-text notes: extend Notes (str 1000) or Description (str 60).
• Enums are value types — changes to existing enum values are additive only in upgrades.

Always check get_enum_details before adding a new value to a standard enum.