JobLine G-Code Intelligence
Deep G-code intelligence for VS Code — syntax highlighting, rich hover tooltips, live canned cycle detection, Macro B support, and a real-time sidebar for Fanuc, Haas, Siemens, Mazak, and Okuma CNC controls.
Features
Syntax Highlighting
Full dialect-aware highlighting for all five major CNC control families. G-codes, M-codes, addresses, macro variables, comments, and program structure are all individually colored so code is readable at a glance.
Supported file extensions: .nc .gcode .ngc .tap .cnc .mpf .spf .prg .min
Hover over any G-code, M-code, or address word to see a full description, parameter list, and usage notes — without leaving your editor.
| Hover over |
You see |
G83 |
Peck Drilling Cycle — Z, R, Q, P, F parameters |
G02 |
Circular Interpolation CW — I, J, K, R |
M06 |
Tool Change |
G54 |
Work Coordinate System 1 |
X, Y, Z |
Axis description |
F, S, T, H, D |
Feed / spindle / tool / offset descriptions |
Siemens CYCLE calls (e.g. CYCLE83, CYCLE840) are also recognized with positional parameter descriptions.
Open the JobLine icon in the Activity Bar to see five live views that update as you type:
| View |
Shows |
| Operations |
Each tool change as a named operation with line range |
| Tools |
All tools called in the program (T-number + description) |
| Offsets |
Work coordinate offsets in use (G54–G59) |
| Canned Cycles |
Every G81/G82/G83/etc. with its parameters |
| Alarms & Warnings |
Diagnostic results (expands in future releases) |
Control Type Selector
Click the [Fanuc] indicator in the VS Code status bar (bottom-left) to instantly switch the active control dialect. The sidebar and hover system adapt accordingly.
Supported controls:
- Fanuc — 0i / 30i / 31i series
- Haas — NGC controls
- Siemens — Sinumerik 840D / 828D
- Mazak — Smooth / Matrix controls
- Okuma — OSP-P controls
Macro B Parser
Variables (#1, #100, #5041), expressions (Z[#1 + 0.5]), and control flow (IF, WHILE, GOTO) are tokenized and evaluated where possible. Unresolvable macro expressions are tracked but never cause false positives.
Requirements
- VS Code 1.85 or newer
- No other extensions required
Extension Settings
| Setting |
Default |
Description |
jobline.controlType |
fanuc |
Active CNC control dialect |
jobline.machineType |
mill |
Machine profile (mill / lathe / mill-turn / grinder) |
jobline.units |
inch |
Default unit system (overridden by G20/G21 in file) |
jobline.validation.enableSafetyChecks |
true |
Crash-prevention safety rules |
jobline.validation.enableArcValidation |
true |
G02/G03 arc geometry validation |
jobline.validation.arcTolerance |
0.001 |
Arc endpoint tolerance (current units) |
jobline.formatter.wordSpacing |
true |
Add spaces between G-code words |
jobline.formatter.decimalPlaces |
null |
Normalize coordinate decimal places |
jobline.formatter.uppercaseGM |
true |
Uppercase G and M codes |
Commands
Open the Command Palette (Ctrl+Shift+P) and type JobLine:
| Command |
Description |
JobLine: Select CNC Control Type |
Switch the active control dialect |
JobLine: Validate Program |
Run safety and arc validation |
JobLine: Format G-Code |
Apply formatter rules to the active file |
Roadmap
The current release (v0.1) establishes the full parsing foundation. Upcoming releases add:
- v0.2 — Diagnostic squiggles: canned cycle parameter errors, arc geometry violations, and safety rule violations highlighted inline
- v0.3 — G-code formatter (word spacing, decimal normalization, uppercase)
- v0.4 — Subprogram resolution and cross-file navigation
- v1.0 — DNC machine connectivity for direct CNC file transfer
Known Issues
JobLine: Validate Program and JobLine: Format G-Code commands are placeholders in v0.1 — full implementations ship in v0.2 and v0.3 respectively.- Siemens CYCLE parameter hover descriptions cover the most common cycles; less-common cycles show a generic tooltip.
Release Notes
See CHANGELOG.md for the full release history.
About
Built by WeCr8 Solutions, LLC — github.com/WeCr8-Solutions
Issues and feature requests: github.com/WeCr8-Solutions/jobline.ai-g-code/issues
