diff --git a/bun.lock b/bun.lock
index 0ba00b23f8..ff186b6750 100644
--- a/bun.lock
+++ b/bun.lock
@@ -367,8 +367,8 @@
         "@opentelemetry/exporter-trace-otlp-http": "0.214.0",
         "@opentelemetry/sdk-trace-base": "2.6.1",
         "@opentelemetry/sdk-trace-node": "2.6.1",
-        "@opentui/core": "0.1.101",
-        "@opentui/solid": "0.1.101",
+        "@opentui/core": "0.1.99",
+        "@opentui/solid": "0.1.99",
         "@parcel/watcher": "2.5.1",
         "@pierre/diffs": "catalog:",
         "@solid-primitives/event-bus": "1.1.2",
@@ -466,16 +466,16 @@
         "zod": "catalog:",
       },
       "devDependencies": {
-        "@opentui/core": "0.1.101",
-        "@opentui/solid": "0.1.101",
+        "@opentui/core": "0.1.99",
+        "@opentui/solid": "0.1.99",
         "@tsconfig/node22": "catalog:",
         "@types/node": "catalog:",
         "@typescript/native-preview": "catalog:",
         "typescript": "catalog:",
       },
       "peerDependencies": {
-        "@opentui/core": ">=0.1.101",
-        "@opentui/solid": ">=0.1.101",
+        "@opentui/core": ">=0.1.99",
+        "@opentui/solid": ">=0.1.99",
       },
       "optionalPeers": [
         "@opentui/core",
@@ -1604,21 +1604,21 @@
 
     "@opentelemetry/semantic-conventions": ["@opentelemetry/semantic-conventions@1.40.0", "", {}, "sha512-cifvXDhcqMwwTlTK04GBNeIe7yyo28Mfby85QXFe1Yk8nmi36Ab/5UQwptOx84SsoGNRg+EVSjwzfSZMy6pmlw=="],
 
-    "@opentui/core": ["@opentui/core@0.1.101", "", { "dependencies": { "bun-ffi-structs": "0.1.2", "diff": "8.0.2", "jimp": "1.6.0", "marked": "17.0.1", "yoga-layout": "3.2.1" }, "optionalDependencies": { "@dimforge/rapier2d-simd-compat": "^0.17.3", "@opentui/core-darwin-arm64": "0.1.101", "@opentui/core-darwin-x64": "0.1.101", "@opentui/core-linux-arm64": "0.1.101", "@opentui/core-linux-x64": "0.1.101", "@opentui/core-win32-arm64": "0.1.101", "@opentui/core-win32-x64": "0.1.101", "bun-webgpu": "0.1.5", "planck": "^1.4.2", "three": "0.177.0" }, "peerDependencies": { "web-tree-sitter": "0.25.10" } }, "sha512-8jUhNKnwCDO3Y2iiEmagoQLjgX5l1WbddQiwky8B5JU4FW0/WRHairBmU1kRAQBmhdeg57dVinSG4iu2PAtKEA=="],
+    "@opentui/core": ["@opentui/core@0.1.99", "", { "dependencies": { "bun-ffi-structs": "0.1.2", "diff": "8.0.2", "jimp": "1.6.0", "marked": "17.0.1", "yoga-layout": "3.2.1" }, "optionalDependencies": { "@dimforge/rapier2d-simd-compat": "^0.17.3", "@opentui/core-darwin-arm64": "0.1.99", "@opentui/core-darwin-x64": "0.1.99", "@opentui/core-linux-arm64": "0.1.99", "@opentui/core-linux-x64": "0.1.99", "@opentui/core-win32-arm64": "0.1.99", "@opentui/core-win32-x64": "0.1.99", "bun-webgpu": "0.1.5", "planck": "^1.4.2", "three": "0.177.0" }, "peerDependencies": { "web-tree-sitter": "0.25.10" } }, "sha512-I3+AEgGzqNWIpWX9g2WOscSPwtQDNOm4KlBjxBWCZjLxkF07u77heWXF7OiAdhKLtNUW6TFiyt6yznqAZPdG3A=="],
 
-    "@opentui/core-darwin-arm64": ["@opentui/core-darwin-arm64@0.1.101", "", { "os": "darwin", "cpu": "arm64" }, "sha512-HtqZh8TIKCH1Nge5J0etBCpzYfPY4fVcq110uJm2As6D/dTTPv8r4J+KkrqoSphkpj/Y2b4t7KpqNHthXA0EVw=="],
+    "@opentui/core-darwin-arm64": ["@opentui/core-darwin-arm64@0.1.99", "", { "os": "darwin", "cpu": "arm64" }, "sha512-bzVrqeX2vb5iWrc/ftOUOqeUY8XO+qSgoTwj5TXHuwagavgwD3Hpeyjx8+icnTTeM4pao0som1WR9xfye6/X5Q=="],
 
-    "@opentui/core-darwin-x64": ["@opentui/core-darwin-x64@0.1.101", "", { "os": "darwin", "cpu": "x64" }, "sha512-o5ClQWnGG1inRE2YZAatPw1jPEAJni00amcoIfKBj8e1WS+fQA+iQTq1xFunNcyNPObLDCVuW1X+NrbK9xmPvQ=="],
+    "@opentui/core-darwin-x64": ["@opentui/core-darwin-x64@0.1.99", "", { "os": "darwin", "cpu": "x64" }, "sha512-VE4FrXBYpkxnvkqcCV1a8aN9jyyMJMihVW+V2NLCtp+4yQsj0AapG5TiUSN76XnmSZRptxDy5rBmEempeoIZbg=="],
 
-    "@opentui/core-linux-arm64": ["@opentui/core-linux-arm64@0.1.101", "", { "os": "linux", "cpu": "arm64" }, "sha512-E/weY7DQpaPWGYDPD0CROHowUotqnVlk7Kb6l9+iZCrxm9s7HPRHkcMDVmcWDqHEqa/J879EJcqaUDzDArqC+w=="],
+    "@opentui/core-linux-arm64": ["@opentui/core-linux-arm64@0.1.99", "", { "os": "linux", "cpu": "arm64" }, "sha512-viXQsbpS7yHjYkl7+am32JdvG96QU9lvHh1UiZtpOxcNUUqiYmA2ZwZFPD2Bi54jNyj5l2hjH6YkD3DzE2FEWA=="],
 
-    "@opentui/core-linux-x64": ["@opentui/core-linux-x64@0.1.101", "", { "os": "linux", "cpu": "x64" }, "sha512-+Bfr8jLbbR1WREUMCCvSZ44G1+WU2lPqJx7x1StTa9iFNEdicxCdd0QQsO6cnKn5yW+2Pr/FdrqHbxSQw3ejbA=="],
+    "@opentui/core-linux-x64": ["@opentui/core-linux-x64@0.1.99", "", { "os": "linux", "cpu": "x64" }, "sha512-WLoEFINOSp0tZSR9y4LUuGc7n4Y7H1wcpjUPzQ9vChkYDXrfZltEanzoDWbDcQ4kZQW5tHVC7LrZHpAsRLwFZg=="],
 
-    "@opentui/core-win32-arm64": ["@opentui/core-win32-arm64@0.1.101", "", { "os": "win32", "cpu": "arm64" }, "sha512-LTMIHJzJrVqS8mgpp+tuyVHuqYlicQTvFi/sTsJ6Xswf1asatsvZYsbQByhBLpFT80j10G7uvDa361S5gjCUDA=="],
+    "@opentui/core-win32-arm64": ["@opentui/core-win32-arm64@0.1.99", "", { "os": "win32", "cpu": "arm64" }, "sha512-yWMOLWCEO8HdrctU1dMkgZC8qGkiO4Dwr4/e11tTvVpRmYhDsP/IR89ZjEEtOwnKwFOFuB/MxvflqaEWVQ2g5Q=="],
 
-    "@opentui/core-win32-x64": ["@opentui/core-win32-x64@0.1.101", "", { "os": "win32", "cpu": "x64" }, "sha512-VaMs5bg6y0tYKptaEK8Hy5wTp4m//wJRKUdW8uvrS9cFgxyovZGuw0+TfK3NgbdeX+8jWm8LEAiak4jle5BABg=="],
+    "@opentui/core-win32-x64": ["@opentui/core-win32-x64@0.1.99", "", { "os": "win32", "cpu": "x64" }, "sha512-aYRlsL2w8YRL6vPd7/hrqlNVkXU3QowWb01TOvAcHS8UAsXaGFUr47kSDyjxDi1wg1MzmVduCfsC7T3NoThV1w=="],
 
-    "@opentui/solid": ["@opentui/solid@0.1.101", "", { "dependencies": { "@babel/core": "7.28.0", "@babel/preset-typescript": "7.27.1", "@opentui/core": "0.1.101", "babel-plugin-module-resolver": "5.0.2", "babel-preset-solid": "1.9.10", "entities": "7.0.1", "s-js": "^0.4.9" }, "peerDependencies": { "solid-js": "1.9.11" } }, "sha512-STY2FQYtVS2rhUgpslG6mM0EAkgobBDF91+B+SNmvXIkJwP+ydP6UVgcuIo5McIbb9GIbAODx5X2Q48PSR7hgw=="],
+    "@opentui/solid": ["@opentui/solid@0.1.99", "", { "dependencies": { "@babel/core": "7.28.0", "@babel/preset-typescript": "7.27.1", "@opentui/core": "0.1.99", "babel-plugin-module-resolver": "5.0.2", "babel-preset-solid": "1.9.10", "entities": "7.0.1", "s-js": "^0.4.9" }, "peerDependencies": { "solid-js": "1.9.11" } }, "sha512-DrqqO4h2V88FmeIP2cErYkMU0ZK5MrUsZw3w6IzZpoXyyiL4/9qpWzUq+CXx+r16VP2iGxDJwGKUmtFAzUch2Q=="],
 
     "@oslojs/asn1": ["@oslojs/asn1@1.0.0", "", { "dependencies": { "@oslojs/binary": "1.0.0" } }, "sha512-zw/wn0sj0j0QKbIXfIlnEcTviaCzYOY3V5rAyjR6YtOByFtJiT574+8p9Wlach0lZH9fddD4yb9laEAIl4vXQA=="],
 
diff --git a/packages/opencode/package.json b/packages/opencode/package.json
index 5d8fd4b540..199f4b2153 100644
--- a/packages/opencode/package.json
+++ b/packages/opencode/package.json
@@ -123,8 +123,8 @@
     "@opentelemetry/exporter-trace-otlp-http": "0.214.0",
     "@opentelemetry/sdk-trace-base": "2.6.1",
     "@opentelemetry/sdk-trace-node": "2.6.1",
-    "@opentui/core": "0.1.101",
-    "@opentui/solid": "0.1.101",
+    "@opentui/core": "0.1.99",
+    "@opentui/solid": "0.1.99",
     "@parcel/watcher": "2.5.1",
     "@pierre/diffs": "catalog:",
     "@solid-primitives/event-bus": "1.1.2",
diff --git a/packages/opencode/src/cli/cmd/tui/app.tsx b/packages/opencode/src/cli/cmd/tui/app.tsx
index 5da2740cce..2b31d078cb 100644
--- a/packages/opencode/src/cli/cmd/tui/app.tsx
+++ b/packages/opencode/src/cli/cmd/tui/app.tsx
@@ -1,6 +1,7 @@
 import { render, TimeToFirstDraw, useKeyboard, useRenderer, useTerminalDimensions } from "@opentui/solid"
 import * as Clipboard from "@tui/util/clipboard"
 import * as Selection from "@tui/util/selection"
+import * as Terminal from "@tui/util/terminal"
 import { createCliRenderer, MouseButton, type CliRendererConfig } from "@opentui/core"
 import { RouteProvider, useRoute } from "@tui/context/route"
 import {
@@ -119,6 +120,12 @@ export function tui(input: {
     const unguard = win32InstallCtrlCGuard()
     win32DisableProcessedInput()
 
+    const mode = await Terminal.getTerminalBackgroundColor()
+
+    // Re-clear after getTerminalBackgroundColor() because setRawMode(false)
+    // restores the original console mode, including processed input on Windows.
+    win32DisableProcessedInput()
+
     const onExit = async () => {
       unguard?.()
       resolve()
@@ -129,7 +136,6 @@ export function tui(input: {
     }
 
     const renderer = await createCliRenderer(rendererConfig(input.config))
-    const mode = (await renderer.waitForThemeMode(1000)) ?? "dark"
 
     await render(() => {
       return (
diff --git a/packages/opencode/src/cli/cmd/tui/util/terminal.ts b/packages/opencode/src/cli/cmd/tui/util/terminal.ts
index c026b7381c..a61390f2cf 100644
--- a/packages/opencode/src/cli/cmd/tui/util/terminal.ts
+++ b/packages/opencode/src/cli/cmd/tui/util/terminal.ts
@@ -17,6 +17,12 @@ function parse(color: string): RGBA | null {
   return null
 }
 
+function mode(background: RGBA | null): "dark" | "light" {
+  if (!background) return "dark"
+  const luminance = (0.299 * background.r + 0.587 * background.g + 0.114 * background.b) / 255
+  return luminance > 0.5 ? "light" : "dark"
+}
+
 /**
  * Query terminal colors including background, foreground, and palette (0-15).
  * Uses OSC escape sequences to retrieve actual terminal color values.
@@ -94,3 +100,36 @@ export async function colors(): Promise<{
     }, 1000)
   })
 }
+
+// Keep startup mode detection separate from `colors()`: the TUI boot path only
+// needs OSC 11 and should resolve on the first background response instead of
+// waiting on the full palette query used by system theme generation.
+export async function getTerminalBackgroundColor(): Promise<"dark" | "light"> {
+  if (!process.stdin.isTTY) return "dark"
+
+  return new Promise((resolve) => {
+    let timeout: NodeJS.Timeout
+
+    const cleanup = () => {
+      process.stdin.setRawMode(false)
+      process.stdin.removeListener("data", handler)
+      clearTimeout(timeout)
+    }
+
+    const handler = (data: Buffer) => {
+      const match = data.toString().match(/\x1b]11;([^\x07\x1b]+)/)
+      if (!match) return
+      cleanup()
+      resolve(mode(parse(match[1])))
+    }
+
+    process.stdin.setRawMode(true)
+    process.stdin.on("data", handler)
+    process.stdout.write("\x1b]11;?\x07")
+
+    timeout = setTimeout(() => {
+      cleanup()
+      resolve("dark")
+    }, 1000)
+  })
+}
diff --git a/packages/plugin/package.json b/packages/plugin/package.json
index 110d6a0916..231d16e5e6 100644
--- a/packages/plugin/package.json
+++ b/packages/plugin/package.json
@@ -22,8 +22,8 @@
     "zod": "catalog:"
   },
   "peerDependencies": {
-    "@opentui/core": ">=0.1.101",
-    "@opentui/solid": ">=0.1.101"
+    "@opentui/core": ">=0.1.99",
+    "@opentui/solid": ">=0.1.99"
   },
   "peerDependenciesMeta": {
     "@opentui/core": {
@@ -34,8 +34,8 @@
     }
   },
   "devDependencies": {
-    "@opentui/core": "0.1.101",
-    "@opentui/solid": "0.1.101",
+    "@opentui/core": "0.1.99",
+    "@opentui/solid": "0.1.99",
     "@tsconfig/node22": "catalog:",
     "@types/node": "catalog:",
     "typescript": "catalog:",