docs: sync README, CHANGELOG and docs with the current state

docs/DEVELOPMENT.md

@@ -5,7 +5,7 @@ Repository: [sourcedock.dev/petrbalvin/gasm-devkit](https://sourcedock.dev/petrb
 ## Prerequisites
 
 - **Go** 1.27+ with `toolchain go1.27.0`
-- **just** — the command runner; every task below is a just recipe
+- **just**, the command runner; every task below is a just recipe
 - No external dependencies beyond the Go toolchain
 
 ## Quick Start
@@ -14,12 +14,17 @@ Repository: [sourcedock.dev/petrbalvin/gasm-devkit](https://sourcedock.dev/petrb
 git clone https://sourcedock.dev/petrbalvin/gasm-devkit.git
 cd gasm-devkit
 just install   # go mod download
-just build     # go vet + gofmt — must pass with zero output
+just build     # go vet + gofmt, must pass with zero output
 just test      # full suite, race detector, 80 % coverage gate
 ```
 
 ## Just Recipes
 
+### `just install`
+
+`go mod download`.  The only module dependency, `golang.org/x/arch`, is
+used in tests only.
+
 ### `just build`
 
 Runs `go vet ./...` and checks `gofmt -l .` produces no output. This is
@@ -28,10 +33,13 @@ the minimum bar before any commit.
 ### `just test`
 
 ```sh
-go test -race -count=1 -coverprofile=coverage.out ./...
+go test -race -count=1 ./...
 ```
 
-Plus an `awk` gate that fails if total coverage is below 80 %.
+Plus a coverage run over the ten analysable packages (arch, asm, ast,
+format, lexer, lint, lsp, parser, token, verify; `debug` and `cmd/gasm`
+need hardware or are CLI glue) and an `awk` gate that fails if total
+coverage is below 80 %.
 
 ### `just fmt`
 
@@ -61,7 +69,7 @@ embedded via `-ldflags "-X main.version=..."`.
 Regenerates the architecture instruction tables in `arch/` by parsing
 the Go toolchain's own assembler source
 (`$GOROOT/src/cmd/internal/obj/<arch>/anames.go`). Requires a Go
-installation. Output is committed — no runtime dependency on the
+installation. Output is committed, with no runtime dependency on the
 toolchain.
 
 ### `just uninstall`
@@ -72,15 +80,15 @@ Removes `coverage.out`, the `gasm` binary, and `*.test` artefacts.
 
 ```sh
 go test -run TestVexGroundTruth ./asm/
-go test -run TestDifferentialLZ4Fuzz ./verify/
-go test -run TestFLACDecorrelate ./verify/
+go test -run TestGroundTruthBasic ./verify/
 go test -run TestGOObjectLinkAndRun ./asm/
+go test -run TestFuzzWideCopy ./verify/
 ```
 
 ## Debugger Note
 
 `gasm debug` spawns a child process from the binary on `$PATH`. It does
-not work with `go run` — install first:
+not work with `go run`; install first:
 
 ```sh
 just install-bin
@@ -97,7 +105,7 @@ ast/                Abstract syntax tree
 parser/             Line-oriented parser
 arch/               Register and instruction tables (generated)
 lint/               Static analysis rules
-s/             Canonical formatter
+format/             Canonical formatter
 lsp/                Language Server Protocol server
 asm/                Standalone assembler, encoder, object emitters
 verify/             JIT execution, differential testing, ABI checks