[lannbot]

Reorganizes the wasi package with no compatibility baggage. The public subpath surface (./cli, ./cli-stdio, ./clocks, ./filesystem{,-node,-web}, ./http, ./io, ./random, ./sockets) stays exactly as designed — the reorganization is everything behind it.

Structure

wasi/src/
  mod.ts                      .            batteries only: wasi() + its option/handle types
  io.ts                       ./io         the parking kernel + stream vocabulary (unchanged home)
  cli.ts / cli_stdio.ts       ./cli, ./cli-stdio
  clocks.ts / random.ts / http.ts
  filesystem{,_node,_web}.ts  ./filesystem{,-node,-web}
  sockets.ts                  ./sockets    fragment factory + docs + vocabulary re-exports
  internal/                   (never exported)
    cli_shared.ts             ExitError, terminal resources, track types
    fs_provider.ts            the filesystem backend seam + track classes
    sockets_shared.ts         WIT types, address codec, validation, error mapping
    sockets_03.ts             the @0.3 track classes
    sockets_02.ts             the @0.2 poll-shaped track
    sockets_platform.ts       the node-builtins backend seam

• The sockets import cycle is gone: sockets.ts ↔ sockets_02.ts (the "cyclic on purpose, hoisting makes it safe" arrangement) is replaced by both tracks importing sockets_shared.ts; nothing imports a sibling.
• cli-stdio no longer imports the capture impl: the shared vocabulary moved to internal/cli_shared.ts; ./cli remains its public home.

Baggage deleted

Verified first: every external consumer (polymorph family, wosh) pins the old @deltic/wasi-shims package at old commit SHAs — nothing consumes the current package's deprecated names.

• wasiShims / WasiShims / WasiShimsOptions (mod.ts, release-bundle entry, header transition note)
• cli-stdio's StdinStream / StdoutStream / STDIO_HIGH_WATER aliases (superseded by ./io's FedInputStream / SinkOutputStream / STREAM_HIGH_WATER)
• mod.ts's wholesale re-export of every fragment's surface — the root now exports the batteries API only (wasi, WasiOptions, WasiImports, CliCaptured + option types, ExitError); everything else at its subpath.

Verification

No behavior change intended. wasi suite 179 green; full just gates pass — notably publish-check (the JSR surface over the new layout), test-bundle (trimmed entry), browsers + OPFS smoke, and the consumer smokes (smoke-tls consumes mod.ts directly).