feat(tools): add run_shell, edit_file, write_file + read_file directory listing

Four standard-tier tool extensions (one tool per extension, zero ABI change):
- tool-read-file: read_file now lists directory contents (sorted, /-suffixed subdirs)
- tool-shell: run_shell (foreground, streamed, cancellable, cwd, timeout + output cap)
- tool-edit-file: edit_file (oldString/newString/replaceAll; errors on absent/non-unique)
- tool-write-file: write_file (explicit overwrite flag)
Registered in host-bin CORE_EXTENSIONS. Live boot clean (shell capability accepted).
686 vitest + 89 bun = 775 tests; tsc -b EXIT 0; biome clean.

1 files changed, 6 insertions, 0 deletions

diff --git a/packages/host-bin/src/main.ts b/packages/host-bin/src/main.ts
index 7f219d1..588dfb8 100644
--- a/packages/host-bin/src/main.ts
+++ b/packages/host-bin/src/main.ts
@@ -24,7 +24,10 @@ import { createSqliteStorage, extension as storageSqliteExt } from "@dispatch/st
 import { createLoadedExtensionsExtension } from "@dispatch/surface-loaded-extensions";
 import { createSurfaceRegistryExtension } from "@dispatch/surface-registry";
 import { extension as throughputStoreExt } from "@dispatch/throughput-store";
+import { extension as toolEditFileExt } from "@dispatch/tool-edit-file";
 import { extension as toolReadFileExt } from "@dispatch/tool-read-file";
+import { extension as toolShellExt } from "@dispatch/tool-shell";
+import { extension as toolWriteFileExt } from "@dispatch/tool-write-file";
 import { createTransportHttpExtension } from "@dispatch/transport-http";
 import { createTransportWsExtension } from "@dispatch/transport-ws";
 import type { ChildHandle } from "./collector-supervisor.js";
@@ -62,7 +65,10 @@ const CORE_EXTENSIONS: readonly Extension[] = [
 	conversationStoreExt,
 	authApikeyExt,
 	providerOpenaiCompatExt,
+	toolEditFileExt,
 	toolReadFileExt,
+	toolShellExt,
+	toolWriteFileExt,
 	throughputStoreExt,
 	sessionOrchestratorExt,
 	createTransportHttpExtension(),