fix: disable LSP + change memory telemetry interval to 15s

- Disable LSP extension (import + CORE_EXTENSIONS) due to crashes
- Make transport-http tolerate LSP being absent (optional getService)
- Remove lsp from transport-http dependsOn manifest
- Change memory telemetry sample interval from 60s to 15s

3 files changed, 19 insertions, 10 deletions

diff --git a/packages/host-bin/src/main.ts b/packages/host-bin/src/main.ts
index f892fe8..29e402e 100644
--- a/packages/host-bin/src/main.ts
+++ b/packages/host-bin/src/main.ts
@@ -21,7 +21,9 @@ import {
   type SecretsAccess,
   type StorageNamespace,
 } from "@dispatch/kernel";
-import { extension as lspExt } from "@dispatch/lsp";
+// LSP temporarily disabled — crashes (unhandled JSON parse, ENOENT on
+// transient .old_modules dirs) and a memory leak. Re-enable after fix.
+// import { extension as lspExt } from "@dispatch/lsp";
 import { extension as mcpExt } from "@dispatch/mcp";
 import { extension as messageQueueExt } from "@dispatch/message-queue";
 import { extension as providerConcurrencyExt } from "@dispatch/provider-concurrency";
@@ -106,7 +108,7 @@ const CORE_EXTENSIONS: readonly Extension[] = [
   skillsExt,
   systemPromptExt,
   cacheWarmingExt,
-  lspExt,
+  // lspExt,  // LSP temporarily disabled — see import above
   // ssh declares `dependsOn: ["exec-backend"]` and PROVIDES the remote
   // exec-backend factory + the ComputerService the HTTP routes delegate to.
   // Its lookups are lazy (tool-/request-time), but it is placed after
diff --git a/packages/host-bin/src/mem-telemetry.ts b/packages/host-bin/src/mem-telemetry.ts
index 7f0bb42..576347b 100644
--- a/packages/host-bin/src/mem-telemetry.ts
+++ b/packages/host-bin/src/mem-telemetry.ts
@@ -23,8 +23,8 @@ import {
   memorySampleAttributes,
 } from "@dispatch/session-orchestrator";
 
-/** Default periodic sample interval: every 60s. */
-export const DEFAULT_MEMORY_SAMPLE_INTERVAL_MS = 60_000;
+/** Default periodic sample interval: every 15s. */
+export const DEFAULT_MEMORY_SAMPLE_INTERVAL_MS = 15_000;
 
 /** Default GC interval: every 5 min (longer than the sample interval). */
 export const DEFAULT_GC_INTERVAL_MS = 5 * 60_000;
@@ -52,7 +52,7 @@ export interface MemoryTelemetryDeps {
    * baseline.
    */
   readonly getActiveConversationCount: () => number;
-  /** Periodic sample interval (ms). Defaults to 60s. */
+  /** Periodic sample interval (ms). Defaults to 15s. */
   readonly sampleIntervalMs?: number;
   /** GC interval (ms). Defaults to 5 min. */
   readonly gcIntervalMs?: number;
@@ -77,7 +77,7 @@ export interface MemoryTelemetryHandle {
 
 /**
  * Start periodic memory telemetry. Logs process.memoryUsage() every
- * `sampleIntervalMs` (default 60s) tagged with the active-conversation count,
+ * `sampleIntervalMs` (default 15s) tagged with the active-conversation count,
  * and every `gcIntervalMs` (default 5 min) runs `gc()` and logs RSS
  * before/after to distinguish live retained objects from GC fragmentation.
  *
@@ -97,7 +97,7 @@ export function startMemoryTelemetry(deps: MemoryTelemetryDeps): MemoryTelemetry
   let gcHandle: MemoryTimerHandle | undefined;
 
   // Periodic sample: log rss/heap/external/arrayBuffers + active-conversation
-  // count every 60s. Correlates RSS growth with active turns so the leak can
+  // count every 15s. Correlates RSS growth with active turns so the leak can
   // be attributed to the streaming path vs an idle baseline.
   const sampleHandle: MemoryTimerHandle | undefined = setIntervalFn(() => {
     const sample = deps.sampleMemory();
diff --git a/packages/transport-http/src/extension.ts b/packages/transport-http/src/extension.ts
index f46fca5..5d394b8 100644
--- a/packages/transport-http/src/extension.ts
+++ b/packages/transport-http/src/extension.ts
@@ -11,6 +11,7 @@ import {
   credentialStoreHandle,
   heartbeatServiceHandle,
   lspServiceHandle,
+  type LspService,
   mcpServiceHandle,
   sessionOrchestratorHandle,
   systemPromptHandle,
@@ -27,7 +28,6 @@ export const manifest: Manifest = {
     "conversation-store",
     "credential-store",
     "heartbeat",
-    "lsp",
     "mcp",
     "session-orchestrator",
     "throughput-store",
@@ -95,7 +95,14 @@ export function createTransportHttpExtension(): Extension & {
       const throughputStore = host.getService(throughputStoreHandle);
       const warmService = host.getService(cacheWarmHandle);
       const compactionService = host.getService(compactionHandle);
-      const lspService = host.getService(lspServiceHandle);
+      // Optional: the `lsp` extension may be disabled (hot-fix). Wrapped because
+      // getService throws for an unregistered handle — degrades to no diagnostics.
+      let lspService: LspService | undefined;
+      try {
+        lspService = host.getService(lspServiceHandle);
+      } catch {
+        lspService = undefined;
+      }
       const mcpService = host.getService(mcpServiceHandle);
       const systemPromptService = host.getService(systemPromptHandle);
       const heartbeatService = host.getService(heartbeatServiceHandle);
@@ -128,7 +135,7 @@ export function createTransportHttpExtension(): Extension & {
         throughputStore,
         warmService,
         compactionService,
-        lspService,
+        ...(lspService !== undefined ? { lspService } : {}),
         mcpService,
         systemPromptService,
         heartbeatService,