refactor: wave 1 - extract leaf modules, rename catch-all files, split index.ts hooks

- Split 25+ index.ts files into hook.ts + extracted modules
- Rename all catch-all utils.ts/helpers.ts to domain-specific names
- Split src/tools/lsp/ into ~15 focused modules
- Split src/tools/delegate-task/ into ~18 focused modules
- Separate shared types from implementation
- 155 files changed, 60+ new files created
- All typecheck clean, 61 tests pass

src/hooks/keyword-detector/ultrawork/source-detector.ts

@@ -0,0 +1,55 @@
+/**
+ * Agent/model detection utilities for ultrawork message routing.
+ *
+ * Routing logic:
+ * 1. Planner agents (prometheus, plan) → planner.ts
+ * 2. GPT 5.2 models → gpt5.2.ts
+ * 3. Everything else (Claude, etc.) → default.ts
+ */
+
+/**
+ * Checks if agent is a planner-type agent.
+ * Planners don't need ultrawork injection (they ARE the planner).
+ */
+export function isPlannerAgent(agentName?: string): boolean {
+  if (!agentName) return false
+  const lowerName = agentName.toLowerCase()
+  if (lowerName.includes("prometheus") || lowerName.includes("planner")) return true
+
+  const normalized = lowerName.replace(/[_-]+/g, " ")
+  return /\bplan\b/.test(normalized)
+}
+
+/**
+ * Checks if model is GPT 5.2 series.
+ * GPT models benefit from specific prompting patterns.
+ */
+export function isGptModel(modelID?: string): boolean {
+  if (!modelID) return false
+  const lowerModel = modelID.toLowerCase()
+  return lowerModel.includes("gpt")
+}
+
+/** Ultrawork message source type */
+export type UltraworkSource = "planner" | "gpt" | "default"
+
+/**
+ * Determines which ultrawork message source to use.
+ */
+export function getUltraworkSource(
+  agentName?: string,
+  modelID?: string
+): UltraworkSource {
+  // Priority 1: Planner agents
+  if (isPlannerAgent(agentName)) {
+    return "planner"
+  }
+
+  // Priority 2: GPT 5.2 models
+  if (isGptModel(modelID)) {
+    return "gpt"
+  }
+
+  // Default: Claude and other models
+  return "default"
+}