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/write-existing-file-guard/hook.ts

@@ -0,0 +1,50 @@
+import type { Hooks, PluginInput } from "@opencode-ai/plugin"
+
+import { existsSync } from "fs"
+import { resolve, isAbsolute, join, normalize, sep } from "path"
+
+import { log } from "../../shared"
+
+export function createWriteExistingFileGuardHook(ctx: PluginInput): Hooks {
+  return {
+    "tool.execute.before": async (input, output) => {
+      const toolName = input.tool?.toLowerCase()
+      if (toolName !== "write") {
+        return
+      }
+
+      const args = output.args as
+        | { filePath?: string; path?: string; file_path?: string }
+        | undefined
+      const filePath = args?.filePath ?? args?.path ?? args?.file_path
+      if (!filePath) {
+        return
+      }
+
+      const resolvedPath = normalize(
+        isAbsolute(filePath) ? filePath : resolve(ctx.directory, filePath)
+      )
+
+      if (existsSync(resolvedPath)) {
+        const sisyphusRoot = join(ctx.directory, ".sisyphus") + sep
+        const isSisyphusMarkdown =
+          resolvedPath.startsWith(sisyphusRoot) && resolvedPath.endsWith(".md")
+        if (isSisyphusMarkdown) {
+          log("[write-existing-file-guard] Allowing .sisyphus/*.md overwrite", {
+            sessionID: input.sessionID,
+            filePath,
+          })
+          return
+        }
+
+        log("[write-existing-file-guard] Blocking write to existing file", {
+          sessionID: input.sessionID,
+          filePath,
+          resolvedPath,
+        })
+
+        throw new Error("File already exists. Use edit tool instead.")
+      }
+    },
+  }
+}

src/hooks/write-existing-file-guard/index.ts

@@ -1,43 +1 @@
-import type { Hooks, PluginInput } from "@opencode-ai/plugin"
-import { existsSync } from "fs"
-import { resolve, isAbsolute, join, normalize, sep } from "path"
-import { log } from "../../shared"
-
-export function createWriteExistingFileGuardHook(ctx: PluginInput): Hooks {
-  return {
-    "tool.execute.before": async (input, output) => {
-      const toolName = input.tool?.toLowerCase()
-      if (toolName !== "write") {
-        return
-      }
-
-      const args = output.args as { filePath?: string; path?: string; file_path?: string } | undefined
-      const filePath = args?.filePath ?? args?.path ?? args?.file_path
-      if (!filePath) {
-        return
-      }
-
-      const resolvedPath = normalize(isAbsolute(filePath) ? filePath : resolve(ctx.directory, filePath))
-
-      if (existsSync(resolvedPath)) {
-        const sisyphusRoot = join(ctx.directory, ".sisyphus") + sep
-        const isSisyphusMarkdown = resolvedPath.startsWith(sisyphusRoot) && resolvedPath.endsWith(".md")
-        if (isSisyphusMarkdown) {
-          log("[write-existing-file-guard] Allowing .sisyphus/*.md overwrite", {
-            sessionID: input.sessionID,
-            filePath,
-          })
-          return
-        }
-
-        log("[write-existing-file-guard] Blocking write to existing file", {
-          sessionID: input.sessionID,
-          filePath,
-          resolvedPath,
-        })
-
-        throw new Error("File already exists. Use edit tool instead.")
-      }
-    },
-  }
-}
+export { createWriteExistingFileGuardHook } from "./hook"