Changelog

All notable changes to PWE are documented here. The project follows the frozen v0.2 contract defined by RFC-0019 through RFC-0036.

[0.2.0] — 2026-09-13

Initial release implementing the complete frozen v0.2 contract.

pwe-api (no_std, dependency-free): frozen types/traits, ability to compute canonical hashes, advertised limits, stable detail-code catalog, time/clock-domain/determinism models, compatibility matrix, resource identity/residency, spatial/interest queries, audit events, and the C11 runtime + plugin ABI surfaces.
pwe-reference: deterministic semantic oracle covering
- schema registry + canonicalization (RFC-0019)
- WIR encode/decode + rejection (RFC-0020)
- typed SSA EIR validator + interpreter (RFC-0021)
- declared-access scheduler (RFC-0022)
- transactional world (RFC-0023)
- distributed ownership state machine (RFC-0024)
- snapshot/delta + transactional restore (RFC-0025)
- CPU JIT with hotness/assumptions/safe-point deopt (RFC-0027)
- immutable render frame (RFC-0028)
- component ABI / domain IR / capability / errors / artifact identity / interchange envelope (RFC-0031..0036)
- physics IR domain nodes (folded from draft RFC-0008)
- pwe-lang: a textual PWE source language (lexer + parser) that compiles to low-level EIR and runs cross-backend (interpreter + CPU JIT) through a runtime with byte-identical write agreement (reference/src/lang.rs).
pwe-conformance: RFC-0029 report runner and RFC-0030 minimal scenario; 12 cases pass with no skips.
include/pwe_abi.h: generated C11 header, layout-locked to the Rust ABI.
docs/rfc-alignment.md and docs/rfc-supersession.md.

The JIT is a validated compiled cache sharing the interpreter's semantics, not a native machine-code emitter. A native backend (Cranelift/LLVM) is a deliberately-scoped future addition.