feat: add client side skills (#1320)

Co-authored-by: Letta Code <noreply@letta.com>

src/cli/App.tsx

@@ -8182,9 +8182,8 @@ export default function App({
             cmd.finish(outputLines.join("\n"), true);
 
             // Manual /compact bypasses stream compaction events, so trigger
-            // post-compaction reminder/skills reinjection on the next user turn.
+            // post-compaction reflection reminder/auto-launch on the next user turn.
             contextTrackerRef.current.pendingReflectionTrigger = true;
-            contextTrackerRef.current.pendingSkillsReinject = true;
           } catch (error) {
             let errorOutput: string;
 

src/cli/commands/runner.ts

@@ -73,13 +73,16 @@ export function createCommandRunner({
   onCommandFinished,
 }: RunnerDeps) {
   function getHandle(id: string, input: string): CommandHandle {
-    // biome-ignore lint/style/noNonNullAssertion: forward-reference pattern — overwritten synchronously below. null! preferred over no-ops to crash loudly if invariant breaks.
+    const uninitialized = (): never => {
+      throw new Error("CommandHandle callback used before initialization");
+    };
+
     const handle: CommandHandle = {
       id,
       input,
-      update: null!,
-      finish: null!,
-      fail: null!,
+      update: uninitialized,
+      finish: uninitialized,
+      fail: uninitialized,
     };
 
     const update = (updateData: CommandUpdate) => {

src/cli/helpers/accumulator.ts

@@ -454,7 +454,6 @@ function extractTextPart(v: unknown): string {
 function markCompactionCompleted(ctx?: ContextTracker): void {
   if (!ctx) return;
   ctx.pendingCompaction = true;
-  ctx.pendingSkillsReinject = true;
   ctx.pendingReflectionTrigger = true;
 }
 

src/cli/helpers/contextTracker.ts

@@ -16,8 +16,6 @@ export type ContextTracker = {
   currentTurnId: number;
   /** Set when a compaction event is seen; consumed by the next usage_statistics push */
   pendingCompaction: boolean;
-  /** Set when compaction happens; consumed by the next user message to reinject skills reminder */
-  pendingSkillsReinject: boolean;
   /** Set when compaction happens; consumed by the next user message to trigger memory reminder/spawn */
   pendingReflectionTrigger: boolean;
 };
@@ -28,7 +26,6 @@ export function createContextTracker(): ContextTracker {
     contextTokensHistory: [],
     currentTurnId: 0, // simple in-memory counter for now
     pendingCompaction: false,
-    pendingSkillsReinject: false,
     pendingReflectionTrigger: false,
   };
 }
@@ -38,6 +35,5 @@ export function resetContextHistory(ct: ContextTracker): void {
   ct.lastContextTokens = 0;
   ct.contextTokensHistory = [];
   ct.pendingCompaction = false;
-  ct.pendingSkillsReinject = false;
   ct.pendingReflectionTrigger = false;
 }