diff --git a/src/App.test.tsx b/src/App.test.tsx
index 76beef7a..4e49da70 100644
--- a/src/App.test.tsx
+++ b/src/App.test.tsx
@@ -83,7 +83,7 @@ vi.mock('@blocknote/react', () => ({
 }))
 
 vi.mock('@blocknote/mantine', () => ({
-  BlockNoteView: ({ children }: any) => <div data-testid="blocknote-view">{children}</div>,
+  BlockNoteView: ({ children }: { children?: React.ReactNode }) => <div data-testid="blocknote-view">{children}</div>,
 }))
 
 vi.mock('@blocknote/mantine/style.css', () => ({}))
diff --git a/src/components/Editor.test.tsx b/src/components/Editor.test.tsx
index 89aea5dc..c97e6068 100644
--- a/src/components/Editor.test.tsx
+++ b/src/components/Editor.test.tsx
@@ -4,13 +4,13 @@ import { describe, it, expect, vi } from 'vitest'
 // Hoisted mock editor — available before vi.mock factory runs.
 // Tests can reconfigure spies (e.g. mockTryParse.mockResolvedValue) before rendering.
 const mockEditor = vi.hoisted(() => ({
-  tryParseMarkdownToBlocks: vi.fn(async () => [] as any[]),
+  tryParseMarkdownToBlocks: vi.fn(async () => [] as unknown[]),
   replaceBlocks: vi.fn(),
   insertBlocks: vi.fn(),
   document: [{ id: '1', type: 'paragraph', content: [], props: {}, children: [] }],
   insertInlineContent: vi.fn(),
   onMount: vi.fn((cb: () => void) => { cb(); return () => {} }),
-  prosemirrorView: {} as any,
+  prosemirrorView: {} as Record<string, unknown>,
   blocksToHTMLLossy: vi.fn(() => ''),
   _tiptapEditor: { commands: { setContent: vi.fn() } },
 }))
@@ -33,7 +33,7 @@ vi.mock('@blocknote/react', () => ({
 }))
 
 vi.mock('@blocknote/mantine', () => ({
-  BlockNoteView: ({ children }: any) => <div data-testid="blocknote-view">{children}</div>,
+  BlockNoteView: ({ children }: { children?: React.ReactNode }) => <div data-testid="blocknote-view">{children}</div>,
 }))
 
 vi.mock('@blocknote/mantine/style.css', () => ({}))
diff --git a/src/components/Editor.tsx b/src/components/Editor.tsx
index 8dcf883a..c0f3ceca 100644
--- a/src/components/Editor.tsx
+++ b/src/components/Editor.tsx
@@ -238,7 +238,7 @@ export const Editor = memo(function Editor({
     },
   })
   // Cache parsed blocks per tab path for instant switching
-  const tabCacheRef = useRef<Map<string, any[]>>(new Map())
+  const tabCacheRef = useRef<Map<string, unknown[]>>(new Map())
   const prevActivePathRef = useRef<string | null>(null)
   const editorMountedRef = useRef(false)
   const pendingSwapRef = useRef<(() => void) | null>(null)
@@ -281,7 +281,7 @@ export const Editor = memo(function Editor({
     const tab = tabs.find(t => t.entry.path === activeTabPath)
     if (!tab) return
 
-    const applyBlocks = (blocks: any[]) => {
+    const applyBlocks = (blocks: unknown[]) => {
       try {
         const current = editor.document
         if (current.length > 0 && blocks.length > 0) {
@@ -317,7 +317,7 @@ export const Editor = memo(function Editor({
 
       try {
         const result = editor.tryParseMarkdownToBlocks(preprocessed)
-        const handleBlocks = (blocks: any[]) => {
+        const handleBlocks = (blocks: unknown[]) => {
           if (prevActivePathRef.current !== targetPath) return
           const withWikilinks = injectWikilinks(blocks)
           // Only cache non-empty results to avoid poisoning the cache
@@ -326,12 +326,12 @@ export const Editor = memo(function Editor({
           }
           applyBlocks(withWikilinks)
         }
-        if (result && typeof (result as any).then === 'function') {
-          (result as unknown as Promise<any[]>).then(handleBlocks).catch((err) => {
+        if (result && typeof (result as Promise<unknown[]>).then === 'function') {
+          (result as Promise<unknown[]>).then(handleBlocks).catch((err) => {
             console.error('Async markdown parse failed:', err)
           })
         } else {
-          handleBlocks(result as any[])
+          handleBlocks(result as unknown[])
         }
       } catch (err) {
         console.error('Failed to parse/swap editor content:', err)
diff --git a/src/hooks/useMcpBridge.ts b/src/hooks/useMcpBridge.ts
index 2279b014..4a28ab31 100644
--- a/src/hooks/useMcpBridge.ts
+++ b/src/hooks/useMcpBridge.ts
@@ -11,8 +11,8 @@ import { useCallback, useRef, useState } from 'react'
 const DEFAULT_WS_URL = 'ws://localhost:9710'
 
 interface PendingRequest {
-  resolve: (value: any) => void
-  reject: (reason: any) => void
+  resolve: (value: unknown) => void
+  reject: (reason: unknown) => void
 }
 
 interface SearchResult {
@@ -68,7 +68,7 @@ export function useMcpBridge(wsUrl = DEFAULT_WS_URL) {
     })
   }, [wsUrl])
 
-  const callTool = useCallback(async <T>(tool: string, args: Record<string, any>): Promise<T> => {
+  const callTool = useCallback(async <T>(tool: string, args: Record<string, unknown>): Promise<T> => {
     const ws = await ensureConnection()
     const id = `mcp-${++idCounterRef.current}`
 
diff --git a/src/mock-tauri.ts b/src/mock-tauri.ts
index af51761e..268fea60 100644
--- a/src/mock-tauri.ts
+++ b/src/mock-tauri.ts
@@ -1641,6 +1641,7 @@ index abc1234..${shortHash} 100644
 
 let mockHasChanges = true
 
+// eslint-disable-next-line @typescript-eslint/no-explicit-any -- mock handler map accepts heterogeneous arg types
 const mockHandlers: Record<string, (args: any) => any> = {
   list_vault: () => MOCK_ENTRIES,
   get_note_content: (args: { path: string }) => MOCK_CONTENT[args.path] ?? '',
@@ -1656,7 +1657,7 @@ const mockHandlers: Record<string, (args: any) => any> = {
   git_push: () => {
     return 'Everything up-to-date'
   },
-  ai_chat: (args: { request: { messages: any[]; model?: string; system?: string } }) => {
+  ai_chat: (args: { request: { messages: { role: string; content: string }[]; model?: string; system?: string } }) => {
     const lastMsg = args.request.messages[args.request.messages.length - 1]?.content ?? ''
     const lower = lastMsg.toLowerCase()
     let content = `I can help you with that. Could you provide more details about what you'd like to know?`
@@ -1742,7 +1743,7 @@ export function updateMockContent(path: string, content: string) {
   }
 }
 
-export async function mockInvoke<T>(cmd: string, args?: any): Promise<T> {
+export async function mockInvoke<T>(cmd: string, args?: Record<string, unknown>): Promise<T> {
   // Try the vault API first for commands that read vault data
   const apiAvailable = await checkVaultApi()
   if (apiAvailable) {
diff --git a/src/utils/ai-chat.ts b/src/utils/ai-chat.ts
index 6966e693..46efc99f 100644
--- a/src/utils/ai-chat.ts
+++ b/src/utils/ai-chat.ts
@@ -177,8 +177,8 @@ export async function streamChat(
 
     await readSseStream(reader, onChunk)
     onDone()
-  } catch (err: any) {
-    onError(err.message || 'Network error')
+  } catch (err: unknown) {
+    onError(err instanceof Error ? err.message : 'Network error')
   }
 }
 
diff --git a/src/utils/wikilinks.ts b/src/utils/wikilinks.ts
index 26f7bf2d..3d656159 100644
--- a/src/utils/wikilinks.ts
+++ b/src/utils/wikilinks.ts
@@ -8,21 +8,36 @@ export function preProcessWikilinks(md: string): string {
   return md.replace(/\[\[([^\]]+)\]\]/g, (_m, target) => `${WL_START}${target}${WL_END}`)
 }
 
+// Minimal shape of a BlockNote block for wikilink processing
+interface BlockLike {
+  content?: InlineItem[]
+  children?: BlockLike[]
+  [key: string]: unknown
+}
+
+interface InlineItem {
+  type: string
+  text?: string
+  props?: Record<string, string>
+  content?: unknown
+  [key: string]: unknown
+}
+
 /** Walk blocks and replace placeholder text with wikilink inline content */
-export function injectWikilinks(blocks: any[]): any[] {
-  return blocks.map(block => {
+export function injectWikilinks(blocks: unknown[]): unknown[] {
+  return (blocks as BlockLike[]).map(block => {
     if (block.content && Array.isArray(block.content)) {
       block.content = expandWikilinksInContent(block.content)
     }
     if (block.children && Array.isArray(block.children)) {
-      block.children = injectWikilinks(block.children)
+      block.children = injectWikilinks(block.children) as BlockLike[]
     }
     return block
   })
 }
 
-function expandWikilinksInContent(content: any[]): any[] {
-  const result: any[] = []
+function expandWikilinksInContent(content: InlineItem[]): InlineItem[] {
+  const result: InlineItem[] = []
   for (const item of content) {
     if (item.type !== 'text' || typeof item.text !== 'string' || !item.text.includes(WL_START)) {
       result.push(item)
diff --git a/vite.config.ts b/vite.config.ts
index 12e740ea..8cb6c282 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -226,7 +226,7 @@ function vaultApiPlugin(): Plugin {
 
 // --- AI Chat proxy helpers ---
 
-function readRequestBody(req: any): Promise<string> {
+function readRequestBody(req: import('http').IncomingMessage): Promise<string> {
   return new Promise((resolve) => {
     let body = ''
     req.on('data', (chunk: Buffer) => { body += chunk.toString() })
@@ -235,7 +235,7 @@ function readRequestBody(req: any): Promise<string> {
 }
 
 async function forwardToAnthropic(params: {
-  apiKey: string; model?: string; messages: any[]; system?: string; maxTokens?: number
+  apiKey: string; model?: string; messages: { role: string; content: string }[]; system?: string; maxTokens?: number
 }): Promise<Response> {
   return fetch('https://api.anthropic.com/v1/messages', {
     method: 'POST',
@@ -254,7 +254,7 @@ async function forwardToAnthropic(params: {
   })
 }
 
-async function streamResponseBody(source: ReadableStream<Uint8Array>, res: any): Promise<void> {
+async function streamResponseBody(source: ReadableStream<Uint8Array>, res: import('http').ServerResponse): Promise<void> {
   const reader = source.getReader()
   const decoder = new TextDecoder()
   let done = false
@@ -300,10 +300,10 @@ function aiChatProxyPlugin(): Plugin {
           } else {
             res.end()
           }
-        } catch (err: any) {
+        } catch (err: unknown) {
           res.statusCode = 500
           res.setHeader('Content-Type', 'application/json')
-          res.end(JSON.stringify({ error: err.message || 'Internal server error' }))
+          res.end(JSON.stringify({ error: err instanceof Error ? err.message : 'Internal server error' }))
         }
       })
     },