chore(release): prepare v0.30.0

Assisted-by: DeepSeek V4 Pro

CHANGELOG.md

@@ -9,6 +9,17 @@ and this project adheres to [Conventional Commits](https://www.conventionalcommi
 
 Unreleased changes on the `development` branch.
 
+## [0.30.0] — 2026-08-13
+
+The LoongArch encoder (Phase 5) ships with ELF64 and GOOBJ emission, verified
+byte-for-byte against `GOARCH=loong64 go tool asm` and linked into a real
+`go build`; the shared GOOBJ emitter now writes the per-function DWARF symbols
+the linker's DWARF pass reads.  The RISC-V encoder reaches byte-for-byte parity
+with `go tool asm`: the frame model, operand ordering, RVC compression,
+large-immediate and `MOV $imm` materialisation, branch/jump encodings, and
+`CALL sym(SB)` (now a `JAL` with an `R_RISCV_JAL` relocation).  The debugger
+tracks four hardware watchpoint slots, and the toolkit is Linux-only.
+
 ### Added
 
 - **LoongArch encoder (Phase 5).**  `gasm asm` can now assemble `_loong64.s`
@@ -100,6 +111,9 @@ Unreleased changes on the `development` branch.
 
 - **Linux only.**  The toolkit, its CI and the released binaries are now
   Linux-only; cross-compiled to linux/{amd64,arm64,riscv64,loong64}.
+- **Go 1.27 toolchain.**  The build and CI toolchain moves to `go1.27rc1`
+  (the release-candidate line used to ship Go 1.27 features on release day),
+  so the emitted GOOBJ relocation types match the toolchain that links them.
 - **Phase 4 closed.**  README's "Remaining" list for the debugger is gone;
   disassembly at PC, memory-write, watchpoints, and source-line mapping are
   all shipped.