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/edit-error-recovery/hook.ts

@@ -0,0 +1,57 @@
+import type { PluginInput } from "@opencode-ai/plugin"
+
+/**
+ * Known Edit tool error patterns that indicate the AI made a mistake
+ */
+export const EDIT_ERROR_PATTERNS = [
+  "oldString and newString must be different",
+  "oldString not found",
+  "oldString found multiple times",
+] as const
+
+/**
+ * System reminder injected when Edit tool fails due to AI mistake
+ * Short, direct, and commanding - forces immediate corrective action
+ */
+export const EDIT_ERROR_REMINDER = `
+[EDIT ERROR - IMMEDIATE ACTION REQUIRED]
+
+You made an Edit mistake. STOP and do this NOW:
+
+1. READ the file immediately to see its ACTUAL current state
+2. VERIFY what the content really looks like (your assumption was wrong)
+3. APOLOGIZE briefly to the user for the error
+4. CONTINUE with corrected action based on the real file content
+
+DO NOT attempt another edit until you've read and verified the file state.
+`
+
+/**
+ * Detects Edit tool errors caused by AI mistakes and injects a recovery reminder
+ *
+ * This hook catches common Edit tool failures:
+ * - oldString and newString must be different (trying to "edit" to same content)
+ * - oldString not found (wrong assumption about file content)
+ * - oldString found multiple times (ambiguous match, need more context)
+ *
+ * @see https://github.com/sst/opencode/issues/4718
+ */
+export function createEditErrorRecoveryHook(_ctx: PluginInput) {
+  return {
+    "tool.execute.after": async (
+      input: { tool: string; sessionID: string; callID: string },
+      output: { title: string; output: string; metadata: unknown }
+    ) => {
+      if (input.tool.toLowerCase() !== "edit") return
+
+      const outputLower = output.output.toLowerCase()
+      const hasEditError = EDIT_ERROR_PATTERNS.some((pattern) =>
+        outputLower.includes(pattern.toLowerCase())
+      )
+
+      if (hasEditError) {
+        output.output += `\n${EDIT_ERROR_REMINDER}`
+      }
+    },
+  }
+}

src/hooks/edit-error-recovery/index.ts

@@ -1,57 +1,5 @@
-import type { PluginInput } from "@opencode-ai/plugin"
-
-/**
- * Known Edit tool error patterns that indicate the AI made a mistake
- */
-export const EDIT_ERROR_PATTERNS = [
-  "oldString and newString must be different",
-  "oldString not found",
-  "oldString found multiple times",
-] as const
-
-/**
- * System reminder injected when Edit tool fails due to AI mistake
- * Short, direct, and commanding - forces immediate corrective action
- */
-export const EDIT_ERROR_REMINDER = `
-[EDIT ERROR - IMMEDIATE ACTION REQUIRED]
-
-You made an Edit mistake. STOP and do this NOW:
-
-1. READ the file immediately to see its ACTUAL current state
-2. VERIFY what the content really looks like (your assumption was wrong)
-3. APOLOGIZE briefly to the user for the error
-4. CONTINUE with corrected action based on the real file content
-
-DO NOT attempt another edit until you've read and verified the file state.
-`
-
-/**
- * Detects Edit tool errors caused by AI mistakes and injects a recovery reminder
- *
- * This hook catches common Edit tool failures:
- * - oldString and newString must be different (trying to "edit" to same content)
- * - oldString not found (wrong assumption about file content)
- * - oldString found multiple times (ambiguous match, need more context)
- *
- * @see https://github.com/sst/opencode/issues/4718
- */
-export function createEditErrorRecoveryHook(_ctx: PluginInput) {
-  return {
-    "tool.execute.after": async (
-      input: { tool: string; sessionID: string; callID: string },
-      output: { title: string; output: string; metadata: unknown }
-    ) => {
-      if (input.tool.toLowerCase() !== "edit") return
-
-      const outputLower = output.output.toLowerCase()
-      const hasEditError = EDIT_ERROR_PATTERNS.some((pattern) =>
-        outputLower.includes(pattern.toLowerCase())
-      )
-
-      if (hasEditError) {
-        output.output += `\n${EDIT_ERROR_REMINDER}`
-      }
-    },
-  }
-}
+export {
+  createEditErrorRecoveryHook,
+  EDIT_ERROR_PATTERNS,
+  EDIT_ERROR_REMINDER,
+} from "./hook";