Release 1.7.2

• New libraries: (lispkit stream), (scheme mapping), (srfi 146), (srfi 165), (srfi 173)
• Fixed memory leak involving recursive local functions
• Support uninterned symbols
• Implement algebraic datatypes in terms of more efficient internal functions
• Extension and re-implementation of library (lispkit type)
• Include miniAdapton in the new third-party directory
• Support custom keywords in let-keywords
• New example code for generating mazes
• Migrated project to Xcode 10.3
• Ported code to Swift 5

Release 1.7.0

• New libraries: (lispkit csv), (lispkit match), (lispkit regexp), (lispkit gvector), (lispkit date-time)
• Extended (lispkit vector) and (lispkit list) libraries
• Support for let-keywords and let*-keywords in library (lispkit control)
• Complete re-write of library import and export logic fixing numerous bugs and incompatibilities with R7RS
• Improved reporting of errors in library definitions
• Support call tracing for individual procedures
• Make the last three REPL results available via *1, *2, and *3
• Allow @ as initial character in identifiers

Release 1.6.0

• New libraries: (lispkit log), (lispkit char-set), (scheme char), (srfi 14 ascii), (srfi 101), (srfi 125)
• Support Scheme libraries from R7RS large/Red edition: (scheme box), (scheme charset), (scheme comparator), (scheme generator), (scheme hash-table), (scheme ideque), (scheme list), (scheme rlist), (scheme set), (scheme sort), (scheme stream), (scheme text), (scheme vector)
• Extended library (lispkit test): support nested test groups, approximate tests, and handle exceptions correctly
• Handle closing of ports correctly in library (lispkit port)
• Fix major bug in library (lispkit system) affecting the composition of file paths
• Bug fixes affecting bytevector-copy!, fold-left, max, min, numerator, denominator, log, magnitude, gcd and lcm, as well as the escaping of symbols
• Move from #\dx???? syntax to #\x???? to represent character literals
• Return more user-friendly error messages for operating system errors

Maintenance Release 1.5.4

• Migrated project to Xcode 10.1 and ported code to Swift 4.2.1
• Included implementation of "Tiny CLOS" as library (lispkit clos)
• New SRFI libraries: SRFI 23, SRFI 34, SRFI 39, SRFI 95

Maintenance Release 1.5.3

• Migrated project to Xcode 10.0 and ported code to Swift 4.2
• Small bug fixes in library (lispkit draw)
• Fixed serious hashing bug (crashing LispKit)
• New SRFI library: SRFI 14, SRFI 16

Maintenance Release 1.5.2

• Several substantial extensions of library (lispkit draw)
• Support for turtle graphics via library (lispkit draw turtle)
• New example code showcasing (lispkit draw turtle) features
• New SRFI library: SRFI 161

Maintenance Release 1.5.1

• Bugfixes and name changes in (lispkit draw)
• New example code showcasing (lispkit draw) features

Release 1.5.0

• Allow importing multiple libraries with one import invocation
• Mark continuations correctly and fix continuation?
• Turn current-input-port, current-output-port, and current-error-port into parameter objects
• New library: (lispkit draw)
• New SRFI libraries: SRFI 111, SRFI 112, SRFI 113
• Fixed bugs in SRFI 69
• Extend (lispkit test) to be more compatible to similar libraries

Release 1.4.1

• Fix memory leaks
• Provide a comfortable command-line interface supporting both a read-eval-print loop and the execution of scripts
• Prelude and libraries path preferences are now handled correctly and do not result in access issues anymore
• Programs blocking on functions like read can now be terminated
• Minor bugs in bitwise operations for exact integers of arbitrary size fixed
• string-split now returns a list instead of a vector
• Complete rewrite of the error reporting subsystem, including support for file-error? and read-error?
• New library: (lispkit test)
• New SRFI libraries: SRFI 69, SRFI 129, SRFI 137, SRFI 145, SRFI 151
• New example code for coroutines, HTTP support, and a small compiler for arithmetic expressions

Release 1.4.0

• Migrated project to Xcode 9.3 and Swift 4
• Bug fixes (esp. in syntax-rules)
• Fixed logic for referencing unquote, etc. in backquote.
• Include native date/time operations and functionality for accessing user data
• Native support for a few common string functions
• Support for read-token (generalization of read-line)
• Added libraries (lispkit stack), (lispkit queue), (lispkit logic)
• Implement bitwise operations for exact integers of arbitrary size
• Complete rewrite of the error reporting and representation sub-system
• Preparations for managing source locations