docs: add the changelog entries and the corpus number to the readme

Assisted-by: GLM 5.3 Flash

CHANGELOG.md

@@ -7,6 +7,40 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [development]
 
+### Added
+
+- **Indirect JMP and CALL on all four architectures.**  `JMP AX`,
+  `CALL AX`, `JMP (BX)` and the memory forms encode at byte parity with
+  the toolchain (FF /2 and FF /4 on amd64); arm64 lowers `JMP (R0)` to
+  BR and accepts the raw BR/BLR spellings; riscv64 lowers `JMP (X5)` to
+  JALR; loong64 accepts the raw `JIRL rd, rj, off` spelling the Go
+  assembler cannot express.  A frameless amd64 function containing a
+  CALL now receives the toolchain's forced base-pointer frame.  The
+  verify trampolines join the ground-truth lists, and a lint check for
+  control flow through registers and memory extends to the new forms.
+- **`gasm asm -GOARCH` and `gasm diff -GOARCH`.**  The target
+  architecture can be named explicitly instead of inferred from the
+  file-name suffix, which is how the suffix-less majority of GOROOT's
+  `.s` files (cpu_x86.s, stub.s, ...) become assemblable.
+- **`gasm audit-instructions --corpus [dir]`.**  Assembles every `.s`
+  file under a directory (default GOROOT/src) with the gasm encoder
+  only: suffixed files for their architecture, suffix-less files for
+  all four, as a GOARCH build would.  Reports the headline number (108
+  of 627 GOROOT files, 17.2 %, assemble for every target architecture
+  today; the pre-0.34 baseline was 23), the per-architecture pass rates
+  and the most common failure reasons with a representative file each,
+  which drive the encodability backlog by frequency.
+- **Fuzz targets for the parser and the formatter.**  FuzzParse (no
+  panic, always a usable file) and FuzzFormatIdempotency (formatting
+  twice equals formatting once; clean input stays clean) seed
+  themselves from the repository's kernels, so the plain test suite
+  replays every seed in CI and `just fuzz` runs the mutation engine on
+  demand.  The first sessions found and fixed eight formatter and
+  lexer defects.
+- **Oracle parity as its own CI step.**  The push pipeline already ran
+  the live go-tool-asm comparison inside the suite; a dedicated step
+  now names that gate when it fails.
+
 ### Changed
 
 - **Canonical just recipes.**  `just gates` is the definition of done
@@ -58,6 +92,23 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `docs/ARCHITECTURE.md` said otherwise.
 - **The CLI reference listed 17 of the 18 lint rules.**  The missing
   `reserved-register-write` is documented with the rest.
+- **riscv64 JALR silently jumped to the wrong register.**  The trampoline
+  form `JALR X0, 0(X5)` read the memory operand's base as the destination,
+  encoding a jump to X0 with no diagnostic; the destination is the first
+  operand.  The leaf detection shared the confusion, so affected functions
+  also grew a bogus prologue.  `JALR X0, 0(X1)` as written in the verify
+  trampoline was mis-encoded since its introduction.
+- **DATA lines demanded their GLOBL first.**  collectData processed the
+  declarations in file order, but the Plan 9 convention puts every DATA
+  line before its symbol's GLOBL; correctly ordered files (most of
+  GOROOT's) failed with "no matching GLOBL".  Two passes: symbols are
+  registered before initialisers are applied.
+- **The formatter lost idempotency on degenerate lines.**  Found by the
+  new fuzz target: illegal tokens survived into the output, a label
+  sharing its line with a non-instruction split into a line the parser
+  rejects, stray-operand lines entered the alignment width computation,
+  and rendered `/ *`, `> >` sequences re-lexed as comments and shifts.
+  The label, width and spacing rules now agree between passes.
 
 ## [0.33.0] - 2026-09-14