Changelog

Versions are synced with Sigil releases. A missing entry indicates no changes for that version.

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[0.7.0] - 2026-03-01

Added

Added procedure specifications with inline (: ...) syntax, optional runtime checking via sigil-checks feature, and predicate combinators (any-of, maybe, list-of, none-of).
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Added define-native compiler form for declaring native C bindings in Scheme modules with optional specs and docstrings.
Added VM-level exception handler stack for tail-optimized guard semantics, replacing prompt-based exception handling.
Added multi-VM threading with share-nothing architecture, message passing, and parallel-map for data-parallel workloads.
Added preemptive yield points at loop back-edges to prevent CPU-bound tasks from starving the async scheduler.
Added procedure specifications with inline (: ...) syntax, optional runtime checking via sigil-checks feature, and predicate combinators (any-of, maybe, list-of, none-of).
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Added immediate-mode terminal UI toolkit with native C grid, layout system, component rendering, event parsing, text input, and chat demo application.
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Added procedure spec display in MCP search and exports tool output.
Added streaming HTTP download support with binary-safe reads and file serving with Range request support.
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Added immediate-mode terminal UI toolkit with native C grid, layout system, component rendering, event parsing, text input, and chat demo application.
Added procedure specs and docstrings to all exported procedures.
Added procedure specs and docstrings to all exported procedures.
Add structured logging package with levels, text/JSON output, configurable targets, and lazy macros.
Added procedure specs and docstrings to all exported procedures.
Add JMAP email client library with session discovery, mailbox operations, email query/get/update, and email sending via EmailSubmission.
Added procedure specs and docstrings to all exported procedures.

Changed

Changed I/O multiplexing to use epoll (Linux) and kqueue (macOS/BSD) instead of select(2) for better scalability.
Changed I/O multiplexing to use epoll (Linux) and kqueue (macOS/BSD) instead of select(2) for better scalability.

Fixed

Fixed false positive capture corruption check in serializer, Windows build issues with mingw macro collision and unix-connect, closure arity errors now catchable by guard, and exception handler double-pop segfault.
Fixed sigil docs api command and added procedure spec signatures to generated API documentation.

[0.5.0] - 2026-02-17

Added

Added test harness generation and build support for packages with native dependencies. Improved native package handling, added c-flags field to library struct. Fixed stdlib inclusion in bundles with custom native runtimes, directory structure preservation in compile-c-sources, and absolute sigil-lib include path resolution.
Added test coverage.
Added test coverage.
Added test coverage for TCP/UDP/address operations and crypto primitives.
Added test coverage for TCP/UDP/address operations and crypto primitives.
Added test coverage.
Added test coverage.
Added test coverage.
Added test coverage.
Added test coverage.
Added test coverage.

Fixed

Fixed random seed initialization crash caused by flonum-to-bignum promotion in modulo. Fixed status command crash when displaying projected versions for packages without changes.
Fixed SSE and remove-after initialization on child elements. Added comprehensive test coverage for routing, middleware, cookies, security, SSE, and response helpers.

Other

New packages split from sigil-studio. Font and image modules moved to (sigil graphics *) namespace.
GC correctness: added write barriers to all heap mutation sites, enabled GC during compilation with full compiler rooting, and added GC stress testing infrastructure. Completed HAMT dict implementation (printing, equality, collision handling, structural removal). Added arbitrary-precision bignum type with full reader/VM/native/serializer integration. Performance: inline caching for module binding lookups, peephole optimizer with 8 superinstruction patterns. Improved error handling: replaced exit(1) with recoverable errors, fixed error propagation in vmerrorabort and OPABORTTO_PROMPT. Added definition location tracking in stack traces. Implemented VFS/bundle directory listing. Fixed number->string precision for exact IEEE 754 roundtrip. Removed dead opcodes.
Configured custom mbedTLS for TLS 1.2 only. Added test coverage for connection predicates, failure paths, and error handling.
New packages split from sigil-studio. Font and image modules moved to (sigil graphics *) namespace.

[0.1.0] - 2026-01-09

Other

Initial release of the test framework with assertions, test discovery, filtering, and formatted output.
Initial release with TCP and UDP socket support for network programming.
Core runtime providing a bytecode VM with incremental mark-sweep garbage collector, S-expression reader with extensible syntax, and hygienic macro system supporting syntax-rules and syntax-case. Native bindings for I/O, filesystem, networking, process management, SQLite, and cryptographic hashing.
Initial release with SXML utilities for XML/HTML document construction and manipulation.
JWT token encoding and verification with HS256 signing support.