feat(frontend,wire): surface system (FE slice 1) + @dispatch/wire types-only split (B2)

FE slice 1 — backend-declared, frontend-agnostic surface system (verified live): new types-only @dispatch/ui-contract (SurfaceSpec / field kinds / region / ActionRef / catalog), surface-registry (typed service handle), transport-ws (Bun WS :24205, path-agnostic upgrade), surface-loaded-extensions (first real surface); kernel HostAPI.getExtensions; host-bin wiring; bin/up. Harness: retire AGENTS 'backend only', ORCHESTRATOR §3/§7/§8, frontend-design.md locked.

B2 — wire-types split (chat-slice prerequisite): new types-only @dispatch/wire single-sources the wire ABI (AgentEvent + 11 variants; conversation model Chunk/ChatMessage/Role/TurnId/StepId + 6 chunk variants; Usage) with zero @dispatch/* deps. @dispatch/kernel re-exports via shims so its public surface is byte-identical (zero consumer blast radius). transport-contract re-exports AgentEvent from @dispatch/wire and drops its @dispatch/kernel dependency, so HTTP clients (the web frontend) consume the wire without the kernel runtime.

tsc -b + biome clean; 460 vitest + 77 bun pass.

1 files changed, 51 insertions, 1 deletions

diff --git a/bun.lock b/bun.lock
index 67f6277..13a9e6c 100644
--- a/bun.lock
+++ b/bun.lock
@@ -51,8 +51,11 @@
         "@dispatch/provider-openai-compat": "workspace:*",
         "@dispatch/session-orchestrator": "workspace:*",
         "@dispatch/storage-sqlite": "workspace:*",
+        "@dispatch/surface-loaded-extensions": "workspace:*",
+        "@dispatch/surface-registry": "workspace:*",
         "@dispatch/tool-read-file": "workspace:*",
         "@dispatch/transport-http": "workspace:*",
+        "@dispatch/transport-ws": "workspace:*",
       },
     },
     "packages/journal-sink": {
@@ -65,6 +68,9 @@
     "packages/kernel": {
       "name": "@dispatch/kernel",
       "version": "0.0.0",
+      "dependencies": {
+        "@dispatch/wire": "workspace:*",
+      },
     },
     "packages/observability-collector": {
       "name": "@dispatch/observability-collector",
@@ -98,6 +104,23 @@
         "@dispatch/kernel": "workspace:*",
       },
     },
+    "packages/surface-loaded-extensions": {
+      "name": "@dispatch/surface-loaded-extensions",
+      "version": "0.0.0",
+      "dependencies": {
+        "@dispatch/kernel": "workspace:*",
+        "@dispatch/surface-registry": "workspace:*",
+        "@dispatch/ui-contract": "workspace:*",
+      },
+    },
+    "packages/surface-registry": {
+      "name": "@dispatch/surface-registry",
+      "version": "0.0.0",
+      "dependencies": {
+        "@dispatch/kernel": "workspace:*",
+        "@dispatch/ui-contract": "workspace:*",
+      },
+    },
     "packages/tool-read-file": {
       "name": "@dispatch/tool-read-file",
       "version": "0.0.0",
@@ -120,7 +143,7 @@
       "name": "@dispatch/transport-contract",
       "version": "0.0.0",
       "dependencies": {
-        "@dispatch/kernel": "workspace:*",
+        "@dispatch/wire": "workspace:*",
       },
     },
     "packages/transport-http": {
@@ -134,6 +157,23 @@
         "hono": "^4.0.0",
       },
     },
+    "packages/transport-ws": {
+      "name": "@dispatch/transport-ws",
+      "version": "0.0.0",
+      "dependencies": {
+        "@dispatch/kernel": "workspace:*",
+        "@dispatch/surface-registry": "workspace:*",
+        "@dispatch/ui-contract": "workspace:*",
+      },
+    },
+    "packages/ui-contract": {
+      "name": "@dispatch/ui-contract",
+      "version": "0.0.0",
+    },
+    "packages/wire": {
+      "name": "@dispatch/wire",
+      "version": "0.0.0",
+    },
   },
   "packages": {
     "@biomejs/biome": ["@biomejs/[email protected]", "", { "optionalDependencies": { "@biomejs/cli-darwin-arm64": "2.4.16", "@biomejs/cli-darwin-x64": "2.4.16", "@biomejs/cli-linux-arm64": "2.4.16", "@biomejs/cli-linux-arm64-musl": "2.4.16", "@biomejs/cli-linux-x64": "2.4.16", "@biomejs/cli-linux-x64-musl": "2.4.16", "@biomejs/cli-win32-arm64": "2.4.16", "@biomejs/cli-win32-x64": "2.4.16" }, "bin": { "biome": "bin/biome" } }, "sha512-x9ajFh1zChVybCiM3TN6OD4phAqLgtPZjFrZF+aTMYCPjwBO+k529TX7PPsAqtGNLeV4UgzwQnowEgS7bGmzcA=="],
@@ -176,6 +216,10 @@
 
     "@dispatch/storage-sqlite": ["@dispatch/storage-sqlite@workspace:packages/storage-sqlite"],
 
+    "@dispatch/surface-loaded-extensions": ["@dispatch/surface-loaded-extensions@workspace:packages/surface-loaded-extensions"],
+
+    "@dispatch/surface-registry": ["@dispatch/surface-registry@workspace:packages/surface-registry"],
+
     "@dispatch/tool-read-file": ["@dispatch/tool-read-file@workspace:packages/tool-read-file"],
 
     "@dispatch/trace-replay": ["@dispatch/trace-replay@workspace:packages/trace-replay"],
@@ -186,6 +230,12 @@
 
     "@dispatch/transport-http": ["@dispatch/transport-http@workspace:packages/transport-http"],
 
+    "@dispatch/transport-ws": ["@dispatch/transport-ws@workspace:packages/transport-ws"],
+
+    "@dispatch/ui-contract": ["@dispatch/ui-contract@workspace:packages/ui-contract"],
+
+    "@dispatch/wire": ["@dispatch/wire@workspace:packages/wire"],
+
     "@esbuild/aix-ppc64": ["@esbuild/[email protected]", "", { "os": "aix", "cpu": "ppc64" }, "sha512-EKX3Qwmhz1eMdEJokhALr0YiD0lhQNwDqkPYyPhiSwKrh7/4KRjQc04sZ8db+5DVVnZ1LmbNDI1uAMPEUBnQPg=="],
 
     "@esbuild/android-arm": ["@esbuild/[email protected]", "", { "os": "android", "cpu": "arm" }, "sha512-jbPXvB4Yj2yBV7HUfE2KHe4GJX51QplCN1pGbYjvsyCZbQmies29EoJbkEc+vYuU5o45AfQn37vZlyXy4YJ8RQ=="],