ACP: harden startup and move configured routing behind plugin seams (#48197)

* ACPX: keep plugin-local runtime installs out of dist

* Gateway: harden ACP startup and service PATH

* ACP: reinitialize error-state configured bindings

* ACP: classify pre-turn runtime failures as session init failures

* Plugins: move configured ACP routing behind channel seams

* Telegram tests: align startup probe assertions after rebase

* Discord: harden ACP configured binding recovery

* ACP: recover Discord bindings after stale runtime exits

* ACPX: replace dead sessions during ensure

* Discord: harden ACP binding recovery

* Discord: fix review follow-ups

* ACP bindings: load channel snapshots across workspaces

* ACP bindings: cache snapshot channel plugin resolution

* Experiments: add ACP pluginification holy grail plan

* Experiments: rename ACP pluginification plan doc

* Experiments: drop old ACP pluginification doc path

* ACP: move configured bindings behind plugin services

* Experiments: update bindings capability architecture plan

* Bindings: isolate configured binding routing and targets

* Discord tests: fix runtime env helper path

* Tests: fix channel binding CI regressions

* Tests: normalize ACP workspace assertion on Windows

* Bindings: isolate configured binding registry

* Bindings: finish configured binding cleanup

* Bindings: finish generic cleanup

* Bindings: align runtime approval callbacks

* ACP: delete residual bindings barrel

* Bindings: restore legacy compatibility

* Revert "Bindings: restore legacy compatibility"

This reverts commit ac2ed68fa2426ecc874d68278c71c71ad363fcfe.

* Tests: drop ACP route legacy helper names

* Discord/ACP: fix binding regressions

---------

Co-authored-by: Onur <2453968+osolmaz@users.noreply.github.com>

src/plugin-sdk/conversation-runtime.ts

@@ -1,6 +1,43 @@
-// Public pairing/session-binding helpers for plugins that manage conversation ownership.
+// Public binding helpers for both runtime plugin-owned bindings and
+// config-driven channel bindings.
 
-export * from "../acp/persistent-bindings.route.js";
+export {
+  createConversationBindingRecord,
+  getConversationBindingCapabilities,
+  listSessionBindingRecords,
+  resolveConversationBindingRecord,
+  touchConversationBindingRecord,
+  unbindConversationBindingRecord,
+} from "../bindings/records.js";
+export {
+  ensureConfiguredBindingRouteReady,
+  resolveConfiguredBindingRoute,
+  type ConfiguredBindingRouteResult,
+} from "../channels/plugins/binding-routing.js";
+export {
+  primeConfiguredBindingRegistry,
+  resolveConfiguredBinding,
+  resolveConfiguredBindingRecord,
+  resolveConfiguredBindingRecordBySessionKey,
+  resolveConfiguredBindingRecordForConversation,
+} from "../channels/plugins/binding-registry.js";
+export {
+  ensureConfiguredBindingTargetReady,
+  ensureConfiguredBindingTargetSession,
+  resetConfiguredBindingTargetInPlace,
+} from "../channels/plugins/binding-targets.js";
+export type {
+  ConfiguredBindingConversation,
+  ConfiguredBindingResolution,
+  CompiledConfiguredBinding,
+  StatefulBindingTargetDescriptor,
+} from "../channels/plugins/binding-types.js";
+export type {
+  StatefulBindingTargetDriver,
+  StatefulBindingTargetReadyResult,
+  StatefulBindingTargetResetResult,
+  StatefulBindingTargetSessionResult,
+} from "../channels/plugins/stateful-target-drivers.js";
 export {
   type BindingStatus,
   type BindingTargetKind,