imZEDe

Mainframe language support for the Zed editor. Syntax highlighting, snippets, and tree-sitter grammars for JCL, COBOL, REXX, and HLASM.

View on GitHub How to Install

Supported Languages

Four mainframe languages with full highlighting and snippets

JCL

Job Control Language. JOB, EXEC, DD statements, JES2/JES3 control, procedures, and symbolic parameters

.jcl .prc .proc .cntl

COBOL

IBM Enterprise COBOL with embedded EXEC SQL and EXEC CICS support. 274 keywords

.cbl .cob .cobol .cpy

REXX

TSO/ISPF REXX with built-in functions, ISPF services, and TSO commands

.rexx .rex .rx

HLASM

IBM High Level Assembler. Instructions, macros, and structured programming

.asm .hlasm .mac

Features

Built for mainframe developers moving to modern editors

🎨

ISPF-Style Colors

Familiar color scheme that feels like home for mainframe developers. Keywords, variables, and comments in the colors you expect.

🌳

Tree-sitter Grammars

Fast, accurate parsing with dedicated tree-sitter grammars for each language. No TextMate fallback. Real structural understanding.

⚡

Code Snippets

Templates for common patterns: JOB cards, EXEC PGM, DD statements, COBOL divisions, REXX functions, and more.

🔗

EXEC SQL & CICS

COBOL embedded SQL and CICS commands highlighted correctly with language injection support.

Installation

Two ways to get started

Option 1

From Zed Extensions

Open Zed
Press Ctrl+Shift+X
Search for imzed
Click Install

Option 2

From Source

Clone the repository
In Zed, go to Extensions
Click Install Dev Extension
Point to the cloned directory

git clone https://github.com/infomanta/imzed

License

Free and open source

MIT License

imZEDe is released under the MIT License. You are free to use, modify, and distribute this extension in personal and commercial projects. View full license.