Implement the 20-track POSIX + P2P roadmap: booter, protocol, coreutils, docs,

and seeder/kernel parity.

Booter / ctx (1.44.0)
- bareOsReadPearRuntimeSnapshotJson; hrpc stock routes documented (kernel.*,
  vfs.readText, bare_os.echo, bare_os.disk_os_hints).
- Peer admission: BARE_OS_DHT_ADDRESS_CLASS_ALLOWLIST + meta.dhtAddressClass;
  shouldAttemptPeer(peerKey, meta).
- Optional BARE_OS_VFS_WARM_CACHE_INVALIDATE_ON_APPEND on system drive cores.
- maybeMergeBareFromDrive: path dedupe + early exit when manifest keys satisfied.
- identity-account: zero UTF-8 passphrase buffer after PBKDF2 (string path).

Shell / utilities
- BARE_OS_SHELL_ERREXIT and set -e / set +e; tests in bare-os-booter/test.js.
- expand: comma-separated POSIX-style tab stops; man page + coreutils tests.

Tooling / docs
- kernel-microbench vfs: warmReplicationPathClassify sketch.
- holepunch-drift-repos suggestedCriticalRepos; sync-holepunch-clones report.
- scripts/README: pretest maintainer runbook; handbook/12 P2P vs POSIX.
- KERNEL_CONTRACT, environment appendix, PLACEHOLDER_BASELINE (multisig gate),
  compatibility matrix, posix artifacts, syscalls.example.json, seeder sync.

Requires: npm run pretest && npm test (already green in session).

kernel/lib/bare/shell-completion.json

@@ -1,6 +1,6 @@
 {
   "schema": 1,
-  "atMs": 1775364261427,
+  "atMs": 1775365560517,
   "commands": [
     "arch",
     "awk",