diff --git a/packages/opencode/src/cli/ui.ts b/packages/opencode/src/cli/ui.ts
index 964ba13b69bd..f2192dbdc9f2 100644
--- a/packages/opencode/src/cli/ui.ts
+++ b/packages/opencode/src/cli/ui.ts
@@ -9,6 +9,28 @@ const GRADIENT_TO = [0x2d, 0x7b, 0xff] as const
 
 export class CancelledError extends Schema.TaggedErrorClass<CancelledError>()("UICancelledError", {}) {}
 
+// Suppresses non-essential stderr chatter (print/println); errors always print.
+let quiet = false
+export function setQuiet(value: boolean) {
+  quiet = value
+}
+
+/** Honor https://no-color.org: any non-empty NO_COLOR value disables ANSI colors. */
+export function colors() {
+  return !process.env.NO_COLOR
+}
+
+/** Remove ANSI color/style sequences from a string. */
+export function strip(text: string) {
+  return text.replaceAll(/\x1b\[[0-9;]*m/g, "")
+}
+
+function render(message: string[]) {
+  const text = message.join(" ")
+  if (colors()) return text
+  return strip(text)
+}
+
 export const Style = {
   TEXT_HIGHLIGHT: "\x1b[96m",
   TEXT_HIGHLIGHT_BOLD: "\x1b[96m\x1b[1m",
@@ -27,13 +49,15 @@ export const Style = {
 }
 
 export function println(...message: string[]) {
+  if (quiet) return
   print(...message)
   process.stderr.write(EOL)
 }
 
 export function print(...message: string[]) {
+  if (quiet) return
   blank = false
-  process.stderr.write(message.join(" "))
+  process.stderr.write(render(message))
 }
 
 let blank = false
@@ -47,7 +71,7 @@ export function logo(pad?: string) {
   const leftWidth = glyphs.left[0].length
   const totalWidth = leftWidth + 1 + glyphs.right[0].length
 
-  if (!process.stdout.isTTY && !process.stderr.isTTY) {
+  if (!colors() || (!process.stdout.isTTY && !process.stderr.isTTY)) {
     return glyphs.left.map((row, index) => `${pad ?? ""}${row} ${glyphs.right[index] ?? ""}`).join(EOL)
   }
 
@@ -105,7 +129,9 @@ export function error(message: string) {
   if (message.startsWith("Error: ")) {
     message = message.slice("Error: ".length)
   }
-  println(Style.TEXT_DANGER_BOLD + "Error: " + Style.TEXT_NORMAL + message)
+  // Errors bypass --quiet: write directly instead of going through println.
+  blank = false
+  process.stderr.write(render([Style.TEXT_DANGER_BOLD + "Error: " + Style.TEXT_NORMAL + message]) + EOL)
 }
 
 export function markdown(text: string): string {
diff --git a/packages/opencode/src/index.ts b/packages/opencode/src/index.ts
index c88625960b01..9e938fe259ee 100644
--- a/packages/opencode/src/index.ts
+++ b/packages/opencode/src/index.ts
@@ -127,7 +127,20 @@ const cli = yargs(args)
     describe: "use a named config profile",
     type: "string",
   })
+  .option("quiet", {
+    describe: "suppress non-essential output on stderr (errors still print)",
+    type: "boolean",
+  })
+  .option("verbose", {
+    describe: "print debug logs to stderr (implies --print-logs and --log-level DEBUG)",
+    type: "boolean",
+  })
   .middleware(async (opts) => {
+    if (opts.quiet) UI.setQuiet(true)
+    if (opts.verbose) {
+      process.env.OPENCODE_PRINT_LOGS = "1"
+      process.env.OPENCODE_LOG_LEVEL = "DEBUG"
+    }
     if (opts.printLogs) process.env.OPENCODE_PRINT_LOGS = "1"
     if (opts.logLevel) process.env.OPENCODE_LOG_LEVEL = opts.logLevel
     if (opts.profile) process.env.OPENCODE_PROFILE = opts.profile
diff --git a/packages/opencode/test/cli/ui.test.ts b/packages/opencode/test/cli/ui.test.ts
new file mode 100644
index 000000000000..56591f0b1613
--- /dev/null
+++ b/packages/opencode/test/cli/ui.test.ts
@@ -0,0 +1,39 @@
+import { afterEach, describe, expect, test } from "bun:test"
+import { UI } from "../../src/cli/ui"
+
+const saved = process.env.NO_COLOR
+
+afterEach(() => {
+  if (saved === undefined) {
+    delete process.env.NO_COLOR
+    return
+  }
+  process.env.NO_COLOR = saved
+})
+
+describe("strip", () => {
+  test("removes ANSI style sequences", () => {
+    expect(UI.strip(`${UI.Style.TEXT_DANGER_BOLD}Error:${UI.Style.TEXT_NORMAL} boom`)).toBe("Error: boom")
+  })
+
+  test("keeps plain text untouched", () => {
+    expect(UI.strip("plain text")).toBe("plain text")
+  })
+})
+
+describe("colors", () => {
+  test("enabled when NO_COLOR is unset", () => {
+    delete process.env.NO_COLOR
+    expect(UI.colors()).toBe(true)
+  })
+
+  test("enabled when NO_COLOR is empty per the spec", () => {
+    process.env.NO_COLOR = ""
+    expect(UI.colors()).toBe(true)
+  })
+
+  test("disabled when NO_COLOR is set to any value", () => {
+    process.env.NO_COLOR = "1"
+    expect(UI.colors()).toBe(false)
+  })
+})