0.5.0-rc.0 - 2026-03-14

Migrate from the pest parser to a new chumsky-based parser, improving parser recovery and enabling multiple parse errors to be reported in one pass #185
simc now accepts --args <file> for parameterized contracts, and witness input is supplied explicitly via --wit <file> #200
Expose contract ABI metadata for tooling via simc --abi, and add library accessors for parameter and witness types #201, #219
Improve compiler diagnostics further by rejecting duplicate type-alias definitions and fixing parser recovery around angle-bracket-delimited syntax #221, #222
Correct LSP hover/completion documentation for build_tapleaf_simplicity, unwrap_left, and unwrap_right #229, #230

0.4.1 - 2026-01-22

VSCode and LSP developer experience improvements -- #199, #214
Adjust jet trace debug-wrapper removal heuristic #198 — not an ideal solution, but adopted as a temporary approach per the discussion in #197.
analyze_named_module: make missing modules equivalent to empty ones #187

Add array_fold builtin function #145
Add getters for Span and improve error handling #146
Add VSCode extension with LSP support #148 #149
Switch NUMS key to BIP-0341 suggested key #143
Fix array_fold powers-of-two bug; fix simc CLI when serde is disabled; enable serde by default #159
Update rust-simplicity to 0.6 #143 #160