GitHub - ERufian/ksharp: Vector calculator and language inspired on K

kharp - k version 3 Language Interpreter in C#

A comprehensive implementation of the K programming language, version 3, a vector programming language from the APL family.

LEGAL TERMS:

ksharp

This software is licensed under the terms of the MIT License with Commons Clause.
You are free to use, modify, and distribute it (including in commercial products), provided you include attribution and do not sell the software (or a product whose value derives substantially from this software) itself.

Full license text: LICENSE

Highlighted details: This Software is provided "AS IS". You are responsible for (a) Maintaining appropriate backup copies of any data file that this software is expected to modify, (b) Ensuring that data written to a storage system using this software can be read back in its entirety and with integrity. The author(s) of this product cannot be held responsible for any data loss resulting directly or indirectly from the use of this product.

📚 Table of Contents

🎯 Current Status
🚀 Quick Start
✅ Implemented Features
📡 IPC Operations
⚙️ Statement Parsing System
🔧 K 3 Features Not Available in K#
🎉 ksharp Enhancements Over k version 3
🏗️ Architecture
- Project Structure
- Core Components
🛠️ Building and Running
🤝 Contributing
👨‍💻 Authorship
📓 Note Regarding Project Name

🎯 Current Status

🆎 Beta Status

The core language in the K Reference Manual is fully implemented: native verbs, adverbs, amend, index, apply and assign, functions, conditionals, I/O and communication, system variables and system functions. The Foreign Function Interface allows using Microsoft .NET objects.

When I started this project, getting to the point where it could run all the idioms in my book was only a dream, and actually achieving it in less than 6 months has been an exhilarating experience. This is a milestone that deserves to be released as the beta version of the project.

📉 Remaining Targets

Debugging: My development has been centered around the unit test framework and I haven't needed debugging so I just de-prioritized it, but is it still part of the 1.0 goals.
Parsing: The architecture is a simple Tokenize-Parse into AST nodes-Evaluate. It doesn't use a stack or finite state machines, like other interpreters for k and APL-family languages use. The result is not as robust as I'd like. Note: if you run into parsing issues, please report the problem and try to simplify the expression, long and clever one-liners, and even some expressions that aren't that "long and clever", will have a moderate probability of confusing the parser.
Simplifying: AI-assisted development was fast, but it also accumulated technical debt at a fast pace. In particular the removal of the "legacy parser" was never completely finished (the original "legacy" parser attempted left-to-right evaluation with backtrack, until that became was eventually unsustainable and it was replaced with the current Long-Right-Scope parser). The end result is code that is more complex than necessary and would benefit from simplification
Optimizing: I don't expect ksharp to compete with native implementations of k in terms of performance. Being based on the .NET VM and using managed memory brings some benefits (garbege collected memory usage, no crashes from memory access problems with malformed data, a rich ecosystem, etc) but those come at a cost in performance. That said, there are some performance improvements that can be implemented: Leveraging a global symbol table hashset, or leveraging Linq-to-objects state-machine optimizations before evaluating results.

✂️ Cuts

I eliminated the k UI from the project goals. I think effort is better spent on making things work with .NET (which opens up many UI choices, like WinForms and Unity).

📈 Latest Test Results

Test Suite: 1549/1549 tests passing (100% success rate)

🎯 Recent Improvements

🏃 Publish profiles - Generate executables for Windows Mac and Linux
🍏 Improved support for command-line editing - Editing now supports Mac and Linux
🔃 Improved support for recursions - Added limits to recursion depth (40) and signal instead of crashing.
📂 Support for delimited file I/O (May 2026) - Enhanced 0: and 1: functionality, fixed 5: functionality
🚀 Improved comparison tolerance (May 2026) - Updated comparison tolerance to better match K compatibility
🎯 Full test suite passing at 100% (May 2026) - Successfully resolved parsing issues that were preventing some K idioms from producing correct results
🔥 Support for adnouns (May 2026) - The over, scan, each and each-prior adverbs can now be used with nouns (vectors, matrices and tensors) for scatter indexing, transitive closure and state transitions.

🚀 Quick Start

Run K3Sharp Interpreter

cd K3CSharp
dotnet run

K User Manual - Complete K language guide with tutorials and examples

✅ Implemented Features

K Reference Manual - Detailed reference for all K functions, operators, and concepts

Core Data Types ✅

Atomic Types: Integer, Float, Character, Symbol, Dictionary, Nil/Self-typed Null, Function, 64-bit Integer
Collections: List, (complex or mixed-type, including nesting), Integer vector, Float vector, Character vector, Symbol vector, 64-bit Integer vector
Special Values: Self-typed Null (0n), infinity (0I, 0i, 0Ij), negative infinity (-0I, -0i, -0Ij), negative zero (-0.0), integral null/NaN (0N, 0n, 0Nj)
Type System: Dynamic typing with automatic promotion
Null Handling: IEEE 754 compliant null propagation

Native Operators, and meaningful glyphs ✅

! monadic - enumerate
! dyadic, atomic right argument - mod (modulo)
! dyadic, vector right argument - rotate
# monadic - count
# dyadic - take
$ monadic - format (simple format)
$ dyadic, character vector right argument - form
$ dyadic, right argument other than character vector - format (format with specifier)
% monadic - invert
% dyadic - divide
& dyadic - min
( ) - grouping separator
, monadic - enlist
, dyadic - join
- monadic, followed by space - change sign
- dyadic - subtract
. as last character to variable path - attribute path
. inside variable path - descend into value
.. in variable path - descend into attribute
. as index for a dictionary - attribute dictionary
. monadic, list (type 0) argument - make dictionary
. monadic, character vector argument - execute
. monadic, dictionary argument - unmake dictionary
. dyadic, first argument is a function - dot apply
. dyadic, first argument is a variable - index at depth
. triadic, third argument is a verb - apply at depth
. triadic, third argument is : - error trap at depth
. tetradic - apply at depth with arguments
/ with whitespace on the left - comment marker
' as the single item in an expression - Signal
' monadic - Signal
: REPL command - resume
: monadic - return
:: with variable name to the left - Global Assign (statement)
: with variable name to the left - Assign (statement)
: with monadic verb to the left and no arguments - Monadic apply and assign
: with dyadic verb to the left and arguments - Dyadic apply and assign
:[ ] variadic - conditional execute and assign (statement)
< monadic - grade up
< dyadic - less
= monadic - group
= dyadic - equals
> monadic - grade down
> dyadic - more
? monadic - uniques
? dyadic with list or null (type 6) on the left - find
? dyadic with function left argument - inverse function
? triadic - apply inverse function
@ monadic - Is Atom
@ dyadic, path left argument, character vector right argument - execute at path
@ dyadic, function left argument - shallow apply
@ dyadic, variable left argument - shallow index
@ triadic, third argument is verb - shallow apply
@ triadic, third argument is : - shallow error trap
@ tetradic - shallow apply with arguments
[ ] with function to the left - Group and dot apply
[ ] with variable to the left and assignment or apply and assign to the right - Amend
[ ] with variable to the left with no assignment to the right - Group and index at depth
\ at the start of a line (whitespace allowed, ^\s*\\) - Marker for REPL command
^ monadic - Shape
^ dyadic - Power
_ monadic - Floor
_ as a prefix - system reserved verb or variable
_ dyadic with integer left argument - drop
_ dyadic with integer vector left argument - cut
{ } - group and make function
| monadic - reverse order
| dyadic - max
~ monadic, with numeric argument - not (is zero, logical negation)
~ monadic, with symbol (variable path) argument - attribute handle
~ dyadic - match
+ monadic - flip (transpose)
+ dyadic - add
* monadic - first or default
* dyadic - multiply
` before a name or a string literal - symbol marker
" " (string literal) enclosing a single item - character
" " (string literal) enclosing multiple items - character vector
; inside grouping (except enclosing quotes) - list separator
\n inside grouping (except enclosing quotes) - list separator
\n in the REPL, outside grouping/enclosing - evaluate

Core Adverb System (Iterations) ✅

Over (/): +/ 1 2 3 4 5 → 15 (fold/reduce)
Scan (\): +\ 1 2 3 4 5 → (1;3;6;10;15) (cumulative)
Each ('): -:' 1 2 3 4 → (-1;-2;-3;-4) (element-wise)
Each-Left (\:): 1 2,\: 3 4 5 → (1 3 4 5;2 3 4 5) (apply operation for each item in left argument, with entire right argument)
Each-Right (/:): 1 2 3 +/: 4 5 → (5 6 7;6 7 8) (apply operation with entire left argument, for each right argument)
Each-Pair (':): ,': 1 2 3 4 → (2 1;3 2;4 3) (apply operation to consecutive pairs, reversing left and right)
Initialization: 1 +/ 2 3 4 5 → 15 (with initial value)
Adverbs for already modified verbs 🆕: ((1 2);(3 4)),/:\:((9 8);(7 6)) → ((1 2 9 8;1 2 7 6);(3 4 9 8;3 4 7 6)) (adjacent adverbs are nested iterations)

Adverbs for Verbialized Nouns (iterative indexing) ✅

' with matrix/tensor immediately to the left - Scatter Select
/ with vector of indices immediately to the left - Transitive Closure (index traversal iteration with convergence)
/ with transition matrix immediately to the left - State Transition (2D iterative index)
\ with vector of indices immediately to the left - Transitive Closure with trace
\ with transition matrix immediately to the left - State Transition with trace
': with transition matrix immediately to the left - 2D Index each prior

Amend, Index, Apply, Assign ✅

Simple assign: a:1 2 3 4
Slice extraction: m[3 4;1 2]
Sliced assignment: m[3 4;1 2]:((8 9);(7 3))
Modify and assign: i+:1 (increment), x-:2 (decrement), n*:3 (multiply-assign), etc.

Core Function System ✅

Anonymous Functions: {[x;y] x + y}
Function Assignment: func: {[x] x * 2}
Function Application: func2 . (4;5), func1 @ 5 or func2[3;5]
Projections: add . 5 creates {[x] 5 + x}
Multi-statement: Functions can have semicolon-separated or newline-separated statements

Attributes ✅

Dependencies - Event system for automatic re-calculation
Triggers - Event system for execute on change
UI Attributes not implemented ❌ - .NET FFI is available for UI development, implementation of the K UI is not expected to be implemented.

Conditionals ✅

:[] - Conditional value
do[] - Fixed iteration
if[] - Conditional execution
while[] - Conditional iteration

I/O and Communication ✅

K Serialization System ✅

Binary Serialize (_db): Convert K data structures to binary format
Binary Deserialize (_bd): Convert binary data back to K data structures

Numbered I/O verbs ✅

0: monadic - read from file as text
0: dyadic - write to file as text
1: monadic - read from K data file using memory mapped access
1: dyadic - write to file as K data
2: monadic - read whole K data file
2: dyadic - FFI Load Assembly. See Foreign Function Interface (FFI)
3: monadic, list argument - Open IPC Port
3: monadic, integer argument - Close IPC Port
3: dyadic - IPC set (asynchronous IPC)
4: monadic - Type (get variable type)
4: dyadic - IPC get (synchronous IPC)
5: monadic - String Representation
5: dyadic - Append to file as text
6: monadic - read from file as raw bytes
6: dyadic - write to file as raw bytes

System Variables and Functions ✅

Internal Info _d (K dir), _v (K vars), _i (index), _f (self-referent function), _n (null singleton)
Process Info_k (version), _p (port), _P (PID), _w (who), _u (user)
System Info _s (space), _h (host), _a (address), _o (os), _c (cores), _r (RAM), _m (mach id)
Trigonometric: _sin, _cos, _tan, _asin, _acos, _atan
Hyperbolic: _sinh, _cosh, _tanh
Exponential: _exp, _log, _sqrt, _sqr
Arithmetic: _abs, _floor, _ceil, _div (integer division)
Bitwise Operations: _and, _or, _xor, _rot, _shift
Matrix: _dot, _mul, _inv, _lsq (least squares regression)
Time Functions: Complete time and date manipulation functions
- _t: current K-time in Seconds since 12:00 AM, January 1, 2035 UTC
- _T: current time in Days since 12:00 AM, January 1, 2035 UTC
- _gtime: Converts K-time to date/time vector ("yyyyMMdd";"hhmmss")
- _ltime: Converts K-time to local time vector with timezone offset
- _jd: Converts date to Julian date (K Julian Date is days since January 1, 2035)
- _dj: Converts Julian date back to yyyyMMdd format
- _lt: Adds GMT-to-local-time offset in seconds to a K-time value
Search Functions: _in (search), _bin (binary search)
String Operations: _sm (string match), _ss (string search), _ssr (string search and replace), _ci (character from integer), _ic (integer from character)
List Operations: _lin (list intersection indices), _sv (scalar from vector), _vs (vector from scalar), _dv (delete value) _di (delete item)
Pattern Matching: Advanced regex-like pattern matching for _sm, _ss and _ssr based on .NET regex, with 1000 ms timeout, customizable via .m.regex.timeout

📡 IPC Operations (Contributed by Michal Wallace @tangentstorm)

Operations 3:, 4: - Complete k version 3 Inter-Process Communication system

3: (IPC Get/Connection) - Open/close connections and asynchronous messaging
- 3:(host;port)` - Open connection, returns handle
- 3:handle - Close connection
- handle 3:data - Send asynchronous request
4: (IPC Set/Synchronous) - Synchronous remote execution
- handle 4:data - Send sync request, returns remote reply
- (host;port) 4:data` - Open, send, and close in one step

IPC-Related System Values:

_i - Listening port number (0 when inactive)
_h - Preferred host for connection tuples
_w - Current incoming socket handle during .m.g/.m.s/.m.c execution

K Tree Hooks:

.m.g - Handles synchronous requests (default: executes K code, returns (status;result))
.m.s - Handles asynchronous requests
.m.c - Runs when connection closes

Server Startup:

ksharp -i PORT              # Start IPC listener in REPL mode
ksharp -i PORT script.k    # Start listener, run script, then serve IPC

⚙️ Statement Parsing System

K LRS Compliant

Left-to-right evaluation of expressions
Grouped elements (parentheses, brackets, braces) do have precedence
No verb-specific precedence (e.g., no EMDAS), only positional
Adverbs, adnouns and brackets bind to the item on its left
Long Right Scope parsing: Everything to the right of a verb is its right argument (resulting in right-to-left precedence within an expression)
Parse Tree Verbs 🆕:
- _parse: Converts character vectors to parse tree representations - _parse "1 + 2" → (`"+", 1, 2)
- _eval: Evaluates parse tree representations - _eval (`"+", 1, 2) → 3

🔧 K version 3 features not available in ksharp

❌ K UI `show and `hide
❌ Attributes related to UI
❌ Debugging and Tracing
❌ K runtime (.kr) and execution without console

🎉 ksharp Enhancements Over k version 3

✅ Smart Integer Division and exponentiation: 4 % 2 → 2, 2 ^ 3 → 8 (integer, not float)
✅ 64-bit Long Integers: 123456789012345j (modeled on e333j)
✅ Compact Symbol Vectors: `a`b`c (no spaces)
✅ Compact List and Dictionary Display: Semicolon-separated format .(`a;1;);(`b;2;))
✅ Additional system variables and functions inspired on e333j: _P _o _c _r _m _y _div (truncating integer division) _and _or _xor _not _rot _shift (bitwise)
✅ No denorm dictionaries: .((`a;1);(`a;2)) is .,(`a;2;) and not .((`a;1;);(`a;2;))
✅ Parse and eval: _parse "1 + 2" _eval (`"+";1;2)
✅ LRS for lists in brackets: a:3;+[a+:7;a+4] evaluates a+:7 before a+4 because a+4 is outside the scope of a+:7
✅ Improved Compatibility with k version 2: _n?i → i and execute at context d@s or d[s] (symbol left argument and character vector right argument)
✅ .NET type handling

Foreign Function Interface (FFI) ✅

Method Invocation: Complete calling of .NET methods from K code with automatic type conversion
Type Mapping: Automatic conversion K data types -> .NET types, .NET objects copied to K dictionaries with hints
Static Members: Loaded into ._dotnet tree
Performance Optimizations: Type caching and object registry for efficient operations
Error Handling: Comprehensive .NET exception handling and propagation to K

Assembly Loading

// Load System.Private.CoreLib assembly
"System.Private.CoreLib" 2: `System.String

// Load custom assembly
"MyAssembly.dll" 2: `MyNamespace.MyClass

// The result is a type dictionary containing metadata

Syntax: assembly_name 2: type_name

Left Argument: Assembly name (file path or assembly name)
Right Argument: Type name (fully qualified .NET type)
Result: Dictionary containing type metadata, methods, properties, constructors

Hint System with _gethint and _sethint

The _gethint and _sethint verbs provide type marshalling control and object creation hints.

// Create a .NET string object from a k string
s:"hello" 
s _sethint `string

// Get type information
s _gethint

Hint Types:

`bool - System.Boolean, subtype of K int
`byte - System.Byte (unsigned int8), subtype of K char (default)
`sbyte - System.SByte (int8), subtype of K char
`short - System.Int16 (int16), subtype of K int
`ushort - System.UInt16 (uint16), subtype of K int
`int - System.Int32 (int32), subtype of K int (default for any value other than 0N)
`uint - System.UInt32 (uint32), subtype of K long int
`long - System.Int64 (int64), subtype of K long int (default for any value other than 0Nj)
`ulong - System.UInt64 (uint64), subtype of K long int
`float - System.Single (float), subtype of K float
`double - System.Double (double), subtype of K float (default)
`object - System.Object (object), subtype of K dictionary
`datetime - System.DateTime, subtype of K int or K float
`timespan - System.TimeSpan, subtype of K int or K float
`dictionary - System.Collections.Hashtable, subtype of K dictionary (default)
`list - System.Collections.Generic.List<System.Object>, subtype of K lists and vectors (default for all except character vectors)
`string - System.String, subtype of K symbol and K character vector (default)
`stringbuilder - System.Text.StringBuilder, subtype of K string
`null - System.DBNull, subtype of K int and long int (default conversion for 0 and 0N)
`method - System.Delegate, subtype of K function

Object Instantiation and Disposal

K3CSharp includes automatic object lifecycle management with explicit disposal capabilities.

// Bind .NET dll
complex:`System.Runtime.Numerics.dll 2: `System.Numerics.Complex

// K verb constructor
complex_new:complex[`constructor]

// Create object
c1:complex_new[2;3]

// Dispose object when done
_dispose c1

// Check object status (returns handle information)
c1._this

NOTE: When a .NET Object is instantiated, a copy of its data will be mapped onto a K dictionary. This dictionary is an independent copy and changes will not be propagated back to .NET. Changing the .NET object must be done through accessors and methods.

Object Registry:

Thread-safe global object tracking
Automatic handle generation
Memory management integration
IDisposable pattern support

The _dotnet Tree

The ._dotnet global tree stores loaded assemblies and type information for efficient reuse.

// Access static methods for loaded assemblies
conj_func: ._dotnet.System.Numerics.Complex.Conjugate

// Enumerate metadata
!._dotnet.System.Numerics.Complex

// Type information is cached for performance

Tree Structure:

Numeric indices: Assembly references
Symbol keys: Assembly names
Nested dictionaries: Type metadata

Method Invocation

Call .NET methods on object instances using dot notation.

// Create object
str: "hello" _hint `object

// Call methods (when method invocation is fully implemented)
str.ToUpper        // Returns "HELLO"
str.Length         // Returns 5
str.Substring(0;2) // Returns "he"

// Access properties
str.Length         // Property access
str.Chars[0]       // Indexer access

Method Calling Features:

Instance method invocation
Static method calls
Property getter/setter access
Field access
Indexer support
Argument marshalling

Error Handling

The FFI system provides comprehensive error handling:

// Invalid assembly
"NonExistent.dll" 2: `SomeType  // Error: Assembly not found

// Invalid type
"System.Core" 2: `NonExistentType  // Error: Type not found

// Method errors
obj.NonExistentMethod  // Error: Method not found

Error Types:

Assembly loading failures
Type resolution errors
Method invocation exceptions
Invalid argument types
Object disposal errors

Performance Considerations

Assembly Caching: Loaded assemblies are cached in _dotnet tree
Object Registry: Efficient handle-based object tracking
Type Marshalling: Optimized for common types
Memory Management: Automatic garbage collection integration

🏗️ Architecture

Project Structure

K3CSharp/
├── ApplyTweaks/                 # Tool MCP Server for applying known_differences.txt to a result
├── K3CSharp/                    # Core interpreter implementation
├── K3CSharp.Comparison/         # k.exe comparison framework
├── K3CSharp.IPC/                # k.exe Inter-Process Communication (Contributed by Michal Wallace @tangentstorm)
├── K3CSharp.IPC.Tests/          # k.exe IPC test framework (Contributed by Michal Wallace @tangentstorm)
├── K3CSharp.MCP/                # Tool MCP Server for running a ksharp session (Contributed by Michal Wallace @tangentstorm)
├── K3CSharp.Comparison/         # k.exe comparison framework
├── K3CSharp.Tests/              # Unit tests 
├── KMCPServer/                  # Tool MCP Server for running an external K/Q interpreter with a command or a script
└── known_differences.txt        # Known differences configuration

Core Components

Lexer.cs: Tokenizes input into tokens with underscore ambiguity resolution
Parser.cs: Recursive descent parser building AST with adverb support
Evaluator.cs: AST traversal and evaluation with complete operator system
K3Value.cs: Type system and value operations

🛠️ Building and Running

Prerequisites

.NET 8.0 SDK is required to build and run ksharp.

Windows

# Download and install .NET 8.0 SDK
# Visit: https://dotnet.microsoft.com/download/dotnet/8.0

Linux (Ubuntu/Debian)

# Install .NET 8.0 SDK
wget https://packages.microsoft.com/config/ubuntu/$(lsb_release -rs)/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb
sudo apt-get update
sudo apt-get install -y dotnet-sdk-8.0

Linux (Fedora/CentOS)

# Install .NET 8.0 SDK
sudo rpm -Uvh https://packages.microsoft.com/config/rhel/8/packages-microsoft-prod.rpm
sudo dnf install -y dotnet-sdk-8.0

macOS

# Install .NET 8.0 SDK using Homebrew
brew install dotnet-sdk@8

# Or download installer from:
# https://dotnet.microsoft.com/download/dotnet/8.0

Install and Run

Windows

# Clone repository
git clone https://github.com/ERufian/ksharp.git
cd ksharp\K3CSharp

# Restore dependencies (optional)
dotnet restore

# Build solution (optional)
dotnet build

# Run 
dotnet run

Linux (Ubuntu/Debian)

# Clone repository
git clone https://github.com/ERufian/ksharp.git
cd ksharp/K3Csharp

# Restore dependencies (optional)
dotnet restore

# Build solution (optional)
dotnet build

# Run 
dotnet run

Linux (Fedora/CentOS)

# Clone repository
git clone https://github.com/ERufian/ksharp.git
cd ksharp/K3CSharp

# Restore dependencies (optional)
dotnet restore

# Build solution (optional)
dotnet build

# Run 
dotnet run

macOS

# Clone repository
git clone https://github.com/ERufian/ksharp.git
cd ksharp/K3CSharp

# Restore dependencies (optional)
dotnet restore

# Build solution (optional)
dotnet build

# Run 
dotnet run

Troubleshooting

Common Issues

"dotnet: command not found"

Ensure .NET 8.0 SDK is installed and in PATH
Restart terminal after installation
Verify with echo $PATH (Linux/macOS) or echo %PATH% (Windows)

"Cannot find project or solution file"

Ensure you're in the correct directory containing .csproj or .sln files
Use ls (Linux/macOS) or dir (Windows) to verify files

Build errors on Linux/macOS

Ensure all required packages are installed
Try dotnet clean followed by dotnet build
Check file permissions: chmod +x *.sh (if using shell scripts)

Performance issues

Use release build: dotnet run -c Release
For large datasets, consider increasing memory: dotnet run --environment DOTNET_GCHeapCount=1

Platform-Specific Tips

Windows PowerShell:

# Set execution policy for scripts (if needed)
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

Linux/macOS Shell:

# Make script files executable
chmod +x *.sh

# Use bash explicitly if needed
bash script.sh

macOS Specific:

# If using zsh (default on modern macOS)
echo 'export PATH=$PATH:$HOME/.dotnet' >> ~/.zshrc
source ~/.zshrc

🤝 Contributing

Report issues

Please include:

Issue Summary
Description of the problem
Expected Result
Steps to reproduce, with a code snippet whenever possible

Please note: I use a Windows 10 machine for development. OS-specific issues should be very rare, but I will not be able to address issues that can be reproduced only on a different OS

Contribute code

VERY IMPORTANT By submitting a contribution you agree that it will be subject to the terms of the MIT License

Fork the repository
Create a feature branch
Add tests for new functionality
Ensure all tests pass
Run comparison framework to verify k.exe compatibility
Submit a pull request

👨‍💻 Authorship

This ksharp interpreter implementation was coded originally by SWE-1.5 and 1.6 with significant contributions from Kimi K-2.5 and 2.6 and Claude Opus/Sonnet 4.5, 4.6 and 4.7 based on specifications, direction, prompts, comments and manual fixes provided by Eusebio Rufian-Zilbermann.

Major Contributors

Michal Wallace (@tangentstorm)
- Complete K version 3 IPC (Inter-Process Communication) system including TCP-based messaging, K tree hooks (.m.g, .m.s, .m.c), and the 3:/4: IPC verbs
- MCP Server for agent interoperation with a ksharp persistent session
- Various bugfixes

Acknowledgements

In addition to direct contributors, the following people have been fundamental to the creation and development of this project. I am very thankful for their influence. Without them, it is possible that this interpreter would not exist.

Arthur Whitney - Creator of the K and Q languages
Adam Jacobs - His comments and insight over the years regarding the K interpreter have provided invaluable inspiration and information.
Joel Kaplan - He gave me the chance to learn K. His warning over a decade ago "Once you learn K it will change your mind and you will never think about programming the same way" has proven to be remarkably accurate.
Stevan Apter - His K parser at nsl.com has been a really helpful source of inspiration and reference. Stevan, together with Sasha Katsman and Michael Rosenberg, greatly helped in my understanding of traditional "idiomatic K".
John Earnest - His oK interpreter was an important inspiration for deciding to develop ksharp. Additionally, his regular questioning of AI assisted development has been an outstanding motivation for pushing the limits and exploring what's possible.

📓 Note regarding project name

This project is ksharp in all lowercase, because it is an interpreter for the k language written in C sharp. Unfortunately there are other projects with very similar names that differ just in capitalization, like Ksharp kSharp, KSHarp, etc. This project is not related to any of them and the name ksharp is not intended to claim any relationship to any of them, the only implied relationships are the k language (as the model) and C sharp (as the tool)

🚀 Try it out: dotnet run and start exploring ksharp!

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kharp - k version 3 Language Interpreter in C#

LEGAL TERMS:

📚 Table of Contents

🎯 Current Status

🆎 Beta Status

📉 Remaining Targets

✂️ Cuts

📈 Latest Test Results

🎯 Recent Improvements

🚀 Quick Start

Run K3Sharp Interpreter

✅ Implemented Features

Core Data Types ✅

Native Operators, and meaningful glyphs ✅

Core Adverb System (Iterations) ✅

Adverbs for Verbialized Nouns (iterative indexing) ✅

Amend, Index, Apply, Assign ✅

Core Function System ✅

Attributes ✅

Conditionals ✅

I/O and Communication ✅

K Serialization System ✅

Numbered I/O verbs ✅

System Variables and Functions ✅

📡 IPC Operations (Contributed by Michal Wallace @tangentstorm)

⚙️ Statement Parsing System

🔧 K version 3 features not available in ksharp

🎉 ksharp Enhancements Over k version 3

Foreign Function Interface (FFI) ✅

Hint System with _gethint and _sethint

Object Instantiation and Disposal

The _dotnet Tree

Method Invocation

Error Handling

Performance Considerations

🏗️ Architecture

Project Structure

Core Components

🛠️ Building and Running

Prerequisites

Windows

Linux (Ubuntu/Debian)

Linux (Fedora/CentOS)

macOS

Install and Run

Windows

Linux (Ubuntu/Debian)

Linux (Fedora/CentOS)

macOS

Troubleshooting

Common Issues

Platform-Specific Tips

🤝 Contributing

Report issues

Contribute code

👨‍💻 Authorship

Major Contributors

Acknowledgements

📓 Note regarding project name