feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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Aug 22, 2026
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feat(computer-use): OCR pictureOnly fallback (macOS Vision) #256

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14 changes: 14 additions & 0 deletions Cargo.lock
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14 changes: 14 additions & 0 deletions crates/computer-use-mcp/Cargo.toml
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Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
"alloc",
"NSArray",
"NSData",
"NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
"objc2-core-foundation",
"VNObservation",
"VNRecognizeTextRequest",
"VNRequest",
"VNRequestHandler",
] }
1 change: 1 addition & 0 deletions crates/computer-use-mcp/src/backend.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
pub target_role: Option<String>,
pub target_title: Option<String>,
pub target_actions: Vec<String>,
pub target_picture_only: bool,
pub x: Option<f64>,
pub y: Option<f64>,
pub text: Option<String>,
Expand Down
1 change: 1 addition & 0 deletions crates/computer-use-mcp/src/backend/macos/ax.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
actions,
enabled,
focused,
picture_only: false,
children: Vec::new(),
};

Expand Down
1 change: 1 addition & 0 deletions crates/computer-use-mcp/src/backend/macos/capture.rs
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Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
.arg("-x")
.arg("-l")
.arg(root.window_id.to_string())
.arg("-o")
.arg("-t")
.arg("png")
.arg(&path)
Expand Down
32 changes: 29 additions & 3 deletions crates/computer-use-mcp/src/backend/macos/mod.rs
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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
root: &RootInfo,
request: ObserveRequest,
) -> Result<RootObservation, BackendError> {
let tree = if request.semantic {
let mut tree = if request.semantic {
ax::observe_tree(root)?
} else {
UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
..UiNode::default()
}
};
let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
let should_capture = match request.capture {
CapturePolicy::Never => false,
CapturePolicy::Always => true,
CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
CapturePolicy::IfSparse => should_ocr,
};
let screenshot_png = should_capture
.then(|| capture::capture_window(root))
.transpose()?;
if should_ocr && let Some(png) = screenshot_png.as_deref() {
match ocr::recognize_text(png) {
Ok(recognized) => tree
.children
.extend(picture_only_nodes(root.frame, &recognized)),
Err(error) => log::warn!("computer-use-mcp: {error}"),
}
}
Ok(RootObservation {
root: root.clone(),
tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
})
}
ActionKind::Click => {
if request.target_picture_only {
let frame = request
.target_frame
.filter(|frame| frame.has_area())
.ok_or_else(|| {
BackendError::new(
BackendErrorCode::InvalidAction,
"pictureOnly OCR target has no clickable frame",
)
})?;
let (x, y) = frame.center();
input::click(x, y, request.button, request.click_count)?;
return Ok(ActionResult::unknown(
"physical click events were posted at the pictureOnly OCR box center",
));
}
if request.target_path.is_some()
&& request.target_actions.iter().any(|a| a == "press")
{
Expand Down
57 changes: 57 additions & 0 deletions crates/computer-use-mcp/src/backend/macos/ocr.rs
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,57 @@
use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
let image_data = NSData::with_bytes(png);
let options = NSDictionary::new();
let handler = VNImageRequestHandler::initWithData_options(
VNImageRequestHandler::alloc(),
&image_data,
&options,
);
let request = VNRecognizeTextRequest::new();
request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
request.setUsesLanguageCorrection(true);
request.setAutomaticallyDetectsLanguage(true);
let request_base: &VNRequest = request.as_ref();
let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
handler
.performRequests_error(&requests)
.map_err(|error| vision_error(error.localizedDescription().to_string()))?;

let Some(observations) = request.results() else {
return Ok(Vec::new());
};
Ok(observations
.to_vec()
.into_iter()
.filter_map(|observation| {
let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
// SAFETY: Vision produced this observation, and `boundingBox` is
// a value-returning accessor whose CGRect ABI is bound by objc2.
let bounding_box = unsafe { observation.boundingBox() };
Some(RecognizedTextBox {
text: candidate.string().to_string(),
normalized_frame: Frame {
x: bounding_box.origin.x,
y: bounding_box.origin.y,
w: bounding_box.size.width,
h: bounding_box.size.height,
},
})
})
.collect())
}

fn vision_error(detail: String) -> BackendError {
BackendError::new(
BackendErrorCode::ObservationFailed,
format!("Vision text recognition failed: {detail}"),
)
}
4 changes: 2 additions & 2 deletions crates/computer-use-mcp/src/lib.rs
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -3,8 +3,8 @@
//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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to your account

 Merged

Tryanks
merged 1 commit into

from

Aug 22, 2026
 Merged


feat(computer-use): OCR pictureOnly fallback (macOS Vision)
#256
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14 changes: 14 additions & 0 deletions
Cargo.lock

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14 changes: 14 additions & 0 deletions
crates/computer-use-mcp/Cargo.toml

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Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
 "alloc",
 "NSArray",
 "NSData",
 "NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
 "objc2-core-foundation",
 "VNObservation",
 "VNRecognizeTextRequest",
 "VNRequest",
 "VNRequestHandler",
] }

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
 pub target_role: Option<String>,
 pub target_title: Option<String>,
 pub target_actions: Vec<String>,
 pub target_picture_only: bool,
 pub x: Option<f64>,
 pub y: Option<f64>,
 pub text: Option<String>,
Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/ax.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
 actions,
 enabled,
 focused,
 picture_only: false,
 children: Vec::new(),
 };

Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/capture.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
 .arg("-x")
 .arg("-l")
 .arg(root.window_id.to_string())
 .arg("-o")
 .arg("-t")
 .arg("png")
 .arg(&path)
Expand Down

32 changes: 29 additions & 3 deletions
crates/computer-use-mcp/src/backend/macos/mod.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
 ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
 ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
 root: &RootInfo,
 request: ObserveRequest,
 ) -> Result<RootObservation, BackendError> {
 let tree = if request.semantic {
 let mut tree = if request.semantic {
 ax::observe_tree(root)?
 } else {
 UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
 ..UiNode::default()
 }
 };
 let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
 let should_capture = match request.capture {
 CapturePolicy::Never => false,
 CapturePolicy::Always => true,
 CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
 CapturePolicy::IfSparse => should_ocr,
 };
 let screenshot_png = should_capture
 .then(|| capture::capture_window(root))
 .transpose()?;
 if should_ocr && let Some(png) = screenshot_png.as_deref() {
 match ocr::recognize_text(png) {
 Ok(recognized) => tree
 .children
 .extend(picture_only_nodes(root.frame, &recognized)),
 Err(error) => log::warn!("computer-use-mcp: {error}"),
 }
 }
 Ok(RootObservation {
 root: root.clone(),
 tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
 })
 }
 ActionKind::Click => {
 if request.target_picture_only {
 let frame = request
 .target_frame
 .filter(|frame| frame.has_area())
 .ok_or_else(|| {
 BackendError::new(
 BackendErrorCode::InvalidAction,
 "pictureOnly OCR target has no clickable frame",
 )
 })?;
 let (x, y) = frame.center();
 input::click(x, y, request.button, request.click_count)?;
 return Ok(ActionResult::unknown(
 "physical click events were posted at the pictureOnly OCR box center",
 ));
 }
 if request.target_path.is_some()
 && request.target_actions.iter().any(|a| a == "press")
 {
Expand Down

57 changes: 57 additions & 0 deletions
crates/computer-use-mcp/src/backend/macos/ocr.rs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,57 @@
use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
 VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
 let image_data = NSData::with_bytes(png);
 let options = NSDictionary::new();
 let handler = VNImageRequestHandler::initWithData_options(
 VNImageRequestHandler::alloc(),
 &image_data,
 &options,
 );
 let request = VNRecognizeTextRequest::new();
 request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
 request.setUsesLanguageCorrection(true);
 request.setAutomaticallyDetectsLanguage(true);
 let request_base: &VNRequest = request.as_ref();
 let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
 handler
 .performRequests_error(&requests)
 .map_err(|error| vision_error(error.localizedDescription().to_string()))?;

 let Some(observations) = request.results() else {
 return Ok(Vec::new());
 };
 Ok(observations
 .to_vec()
 .into_iter()
 .filter_map(|observation| {
 let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
 // SAFETY: Vision produced this observation, and `boundingBox` is
 // a value-returning accessor whose CGRect ABI is bound by objc2.
 let bounding_box = unsafe { observation.boundingBox() };
 Some(RecognizedTextBox {
 text: candidate.string().to_string(),
 normalized_frame: Frame {
 x: bounding_box.origin.x,
 y: bounding_box.origin.y,
 w: bounding_box.size.width,
 h: bounding_box.size.height,
 },
 })
 })
 .collect())
}

fn vision_error(detail: String) -> BackendError {
 BackendError::new(
 BackendErrorCode::ObservationFailed,
 format!("Vision text recognition failed: {detail}"),
 )
}

4 changes: 2 additions & 2 deletions
crates/computer-use-mcp/src/lib.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -3,8 +3,8 @@
//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

Tryanks
merged 1 commit into

from

Aug 22, 2026
 Merged


feat(computer-use): OCR pictureOnly fallback (macOS Vision)
#256
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14 changes: 14 additions & 0 deletions
Cargo.lock

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14 changes: 14 additions & 0 deletions
crates/computer-use-mcp/Cargo.toml

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Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
 "alloc",
 "NSArray",
 "NSData",
 "NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
 "objc2-core-foundation",
 "VNObservation",
 "VNRecognizeTextRequest",
 "VNRequest",
 "VNRequestHandler",
] }

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
 pub target_role: Option<String>,
 pub target_title: Option<String>,
 pub target_actions: Vec<String>,
 pub target_picture_only: bool,
 pub x: Option<f64>,
 pub y: Option<f64>,
 pub text: Option<String>,
Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/ax.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
 actions,
 enabled,
 focused,
 picture_only: false,
 children: Vec::new(),
 };

Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/capture.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
 .arg("-x")
 .arg("-l")
 .arg(root.window_id.to_string())
 .arg("-o")
 .arg("-t")
 .arg("png")
 .arg(&path)
Expand Down

32 changes: 29 additions & 3 deletions
crates/computer-use-mcp/src/backend/macos/mod.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
 ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
 ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
 root: &RootInfo,
 request: ObserveRequest,
 ) -> Result<RootObservation, BackendError> {
 let tree = if request.semantic {
 let mut tree = if request.semantic {
 ax::observe_tree(root)?
 } else {
 UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
 ..UiNode::default()
 }
 };
 let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
 let should_capture = match request.capture {
 CapturePolicy::Never => false,
 CapturePolicy::Always => true,
 CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
 CapturePolicy::IfSparse => should_ocr,
 };
 let screenshot_png = should_capture
 .then(|| capture::capture_window(root))
 .transpose()?;
 if should_ocr && let Some(png) = screenshot_png.as_deref() {
 match ocr::recognize_text(png) {
 Ok(recognized) => tree
 .children
 .extend(picture_only_nodes(root.frame, &recognized)),
 Err(error) => log::warn!("computer-use-mcp: {error}"),
 }
 }
 Ok(RootObservation {
 root: root.clone(),
 tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
 })
 }
 ActionKind::Click => {
 if request.target_picture_only {
 let frame = request
 .target_frame
 .filter(|frame| frame.has_area())
 .ok_or_else(|| {
 BackendError::new(
 BackendErrorCode::InvalidAction,
 "pictureOnly OCR target has no clickable frame",
 )
 })?;
 let (x, y) = frame.center();
 input::click(x, y, request.button, request.click_count)?;
 return Ok(ActionResult::unknown(
 "physical click events were posted at the pictureOnly OCR box center",
 ));
 }
 if request.target_path.is_some()
 && request.target_actions.iter().any(|a| a == "press")
 {
Expand Down

57 changes: 57 additions & 0 deletions
crates/computer-use-mcp/src/backend/macos/ocr.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,57 @@
use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
 VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
 let image_data = NSData::with_bytes(png);
 let options = NSDictionary::new();
 let handler = VNImageRequestHandler::initWithData_options(
 VNImageRequestHandler::alloc(),
 &image_data,
 &options,
 );
 let request = VNRecognizeTextRequest::new();
 request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
 request.setUsesLanguageCorrection(true);
 request.setAutomaticallyDetectsLanguage(true);
 let request_base: &VNRequest = request.as_ref();
 let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
 handler
 .performRequests_error(&requests)
 .map_err(|error| vision_error(error.localizedDescription().to_string()))?;

 let Some(observations) = request.results() else {
 return Ok(Vec::new());
 };
 Ok(observations
 .to_vec()
 .into_iter()
 .filter_map(|observation| {
 let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
 // SAFETY: Vision produced this observation, and `boundingBox` is
 // a value-returning accessor whose CGRect ABI is bound by objc2.
 let bounding_box = unsafe { observation.boundingBox() };
 Some(RecognizedTextBox {
 text: candidate.string().to_string(),
 normalized_frame: Frame {
 x: bounding_box.origin.x,
 y: bounding_box.origin.y,
 w: bounding_box.size.width,
 h: bounding_box.size.height,
 },
 })
 })
 .collect())
}

fn vision_error(detail: String) -> BackendError {
 BackendError::new(
 BackendErrorCode::ObservationFailed,
 format!("Vision text recognition failed: {detail}"),
 )
}

4 changes: 2 additions & 2 deletions
crates/computer-use-mcp/src/lib.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -3,8 +3,8 @@
//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)
#256
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14 changes: 14 additions & 0 deletions
Cargo.lock

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Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.


14 changes: 14 additions & 0 deletions
crates/computer-use-mcp/Cargo.toml

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Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
 "alloc",
 "NSArray",
 "NSData",
 "NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
 "objc2-core-foundation",
 "VNObservation",
 "VNRecognizeTextRequest",
 "VNRequest",
 "VNRequestHandler",
] }

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
 pub target_role: Option<String>,
 pub target_title: Option<String>,
 pub target_actions: Vec<String>,
 pub target_picture_only: bool,
 pub x: Option<f64>,
 pub y: Option<f64>,
 pub text: Option<String>,
Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/ax.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
 actions,
 enabled,
 focused,
 picture_only: false,
 children: Vec::new(),
 };

Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/capture.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
 .arg("-x")
 .arg("-l")
 .arg(root.window_id.to_string())
 .arg("-o")
 .arg("-t")
 .arg("png")
 .arg(&path)
Expand Down

32 changes: 29 additions & 3 deletions
crates/computer-use-mcp/src/backend/macos/mod.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
 ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
 ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
 root: &RootInfo,
 request: ObserveRequest,
 ) -> Result<RootObservation, BackendError> {
 let tree = if request.semantic {
 let mut tree = if request.semantic {
 ax::observe_tree(root)?
 } else {
 UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
 ..UiNode::default()
 }
 };
 let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
 let should_capture = match request.capture {
 CapturePolicy::Never => false,
 CapturePolicy::Always => true,
 CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
 CapturePolicy::IfSparse => should_ocr,
 };
 let screenshot_png = should_capture
 .then(|| capture::capture_window(root))
 .transpose()?;
 if should_ocr && let Some(png) = screenshot_png.as_deref() {
 match ocr::recognize_text(png) {
 Ok(recognized) => tree
 .children
 .extend(picture_only_nodes(root.frame, &recognized)),
 Err(error) => log::warn!("computer-use-mcp: {error}"),
 }
 }
 Ok(RootObservation {
 root: root.clone(),
 tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
 })
 }
 ActionKind::Click => {
 if request.target_picture_only {
 let frame = request
 .target_frame
 .filter(|frame| frame.has_area())
 .ok_or_else(|| {
 BackendError::new(
 BackendErrorCode::InvalidAction,
 "pictureOnly OCR target has no clickable frame",
 )
 })?;
 let (x, y) = frame.center();
 input::click(x, y, request.button, request.click_count)?;
 return Ok(ActionResult::unknown(
 "physical click events were posted at the pictureOnly OCR box center",
 ));
 }
 if request.target_path.is_some()
 && request.target_actions.iter().any(|a| a == "press")
 {
Expand Down

57 changes: 57 additions & 0 deletions
crates/computer-use-mcp/src/backend/macos/ocr.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,57 @@
use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
 VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
 let image_data = NSData::with_bytes(png);
 let options = NSDictionary::new();
 let handler = VNImageRequestHandler::initWithData_options(
 VNImageRequestHandler::alloc(),
 &image_data,
 &options,
 );
 let request = VNRecognizeTextRequest::new();
 request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
 request.setUsesLanguageCorrection(true);
 request.setAutomaticallyDetectsLanguage(true);
 let request_base: &VNRequest = request.as_ref();
 let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
 handler
 .performRequests_error(&requests)
 .map_err(|error| vision_error(error.localizedDescription().to_string()))?;

 let Some(observations) = request.results() else {
 return Ok(Vec::new());
 };
 Ok(observations
 .to_vec()
 .into_iter()
 .filter_map(|observation| {
 let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
 // SAFETY: Vision produced this observation, and `boundingBox` is
 // a value-returning accessor whose CGRect ABI is bound by objc2.
 let bounding_box = unsafe { observation.boundingBox() };
 Some(RecognizedTextBox {
 text: candidate.string().to_string(),
 normalized_frame: Frame {
 x: bounding_box.origin.x,
 y: bounding_box.origin.y,
 w: bounding_box.size.width,
 h: bounding_box.size.height,
 },
 })
 })
 .collect())
}

fn vision_error(detail: String) -> BackendError {
 BackendError::new(
 BackendErrorCode::ObservationFailed,
 format!("Vision text recognition failed: {detail}"),
 )
}

4 changes: 2 additions & 2 deletions
crates/computer-use-mcp/src/lib.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -3,8 +3,8 @@
//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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 Merged

Tryanks
merged 1 commit into

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Aug 22, 2026
 Merged


feat(computer-use): OCR pictureOnly fallback (macOS Vision)
#256
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14 changes: 14 additions & 0 deletions
Cargo.lock

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14 changes: 14 additions & 0 deletions
crates/computer-use-mcp/Cargo.toml

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Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
 "alloc",
 "NSArray",
 "NSData",
 "NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
 "objc2-core-foundation",
 "VNObservation",
 "VNRecognizeTextRequest",
 "VNRequest",
 "VNRequestHandler",
] }

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
 pub target_role: Option<String>,
 pub target_title: Option<String>,
 pub target_actions: Vec<String>,
 pub target_picture_only: bool,
 pub x: Option<f64>,
 pub y: Option<f64>,
 pub text: Option<String>,
Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/ax.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
 actions,
 enabled,
 focused,
 picture_only: false,
 children: Vec::new(),
 };

Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/capture.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
 .arg("-x")
 .arg("-l")
 .arg(root.window_id.to_string())
 .arg("-o")
 .arg("-t")
 .arg("png")
 .arg(&path)
Expand Down

32 changes: 29 additions & 3 deletions
crates/computer-use-mcp/src/backend/macos/mod.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
 ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
 ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
 root: &RootInfo,
 request: ObserveRequest,
 ) -> Result<RootObservation, BackendError> {
 let tree = if request.semantic {
 let mut tree = if request.semantic {
 ax::observe_tree(root)?
 } else {
 UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
 ..UiNode::default()
 }
 };
 let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
 let should_capture = match request.capture {
 CapturePolicy::Never => false,
 CapturePolicy::Always => true,
 CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
 CapturePolicy::IfSparse => should_ocr,
 };
 let screenshot_png = should_capture
 .then(|| capture::capture_window(root))
 .transpose()?;
 if should_ocr && let Some(png) = screenshot_png.as_deref() {
 match ocr::recognize_text(png) {
 Ok(recognized) => tree
 .children
 .extend(picture_only_nodes(root.frame, &recognized)),
 Err(error) => log::warn!("computer-use-mcp: {error}"),
 }
 }
 Ok(RootObservation {
 root: root.clone(),
 tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
 })
 }
 ActionKind::Click => {
 if request.target_picture_only {
 let frame = request
 .target_frame
 .filter(|frame| frame.has_area())
 .ok_or_else(|| {
 BackendError::new(
 BackendErrorCode::InvalidAction,
 "pictureOnly OCR target has no clickable frame",
 )
 })?;
 let (x, y) = frame.center();
 input::click(x, y, request.button, request.click_count)?;
 return Ok(ActionResult::unknown(
 "physical click events were posted at the pictureOnly OCR box center",
 ));
 }
 if request.target_path.is_some()
 && request.target_actions.iter().any(|a| a == "press")
 {
Expand Down

57 changes: 57 additions & 0 deletions
crates/computer-use-mcp/src/backend/macos/ocr.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,57 @@
use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
 VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
 let image_data = NSData::with_bytes(png);
 let options = NSDictionary::new();
 let handler = VNImageRequestHandler::initWithData_options(
 VNImageRequestHandler::alloc(),
 &image_data,
 &options,
 );
 let request = VNRecognizeTextRequest::new();
 request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
 request.setUsesLanguageCorrection(true);
 request.setAutomaticallyDetectsLanguage(true);
 let request_base: &VNRequest = request.as_ref();
 let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
 handler
 .performRequests_error(&requests)
 .map_err(|error| vision_error(error.localizedDescription().to_string()))?;

 let Some(observations) = request.results() else {
 return Ok(Vec::new());
 };
 Ok(observations
 .to_vec()
 .into_iter()
 .filter_map(|observation| {
 let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
 // SAFETY: Vision produced this observation, and `boundingBox` is
 // a value-returning accessor whose CGRect ABI is bound by objc2.
 let bounding_box = unsafe { observation.boundingBox() };
 Some(RecognizedTextBox {
 text: candidate.string().to_string(),
 normalized_frame: Frame {
 x: bounding_box.origin.x,
 y: bounding_box.origin.y,
 w: bounding_box.size.width,
 h: bounding_box.size.height,
 },
 })
 })
 .collect())
}

fn vision_error(detail: String) -> BackendError {
 BackendError::new(
 BackendErrorCode::ObservationFailed,
 format!("Vision text recognition failed: {detail}"),
 )
}

4 changes: 2 additions & 2 deletions
crates/computer-use-mcp/src/lib.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -3,8 +3,8 @@
//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

Tryanks
merged 1 commit into

from

Aug 22, 2026
 Merged


feat(computer-use): OCR pictureOnly fallback (macOS Vision)
#256
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14 changes: 14 additions & 0 deletions
Cargo.lock

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14 changes: 14 additions & 0 deletions
crates/computer-use-mcp/Cargo.toml

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Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
 "alloc",
 "NSArray",
 "NSData",
 "NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
 "objc2-core-foundation",
 "VNObservation",
 "VNRecognizeTextRequest",
 "VNRequest",
 "VNRequestHandler",
] }

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
 pub target_role: Option<String>,
 pub target_title: Option<String>,
 pub target_actions: Vec<String>,
 pub target_picture_only: bool,
 pub x: Option<f64>,
 pub y: Option<f64>,
 pub text: Option<String>,
Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/ax.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
 actions,
 enabled,
 focused,
 picture_only: false,
 children: Vec::new(),
 };

Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/capture.rs

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Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
 .arg("-x")
 .arg("-l")
 .arg(root.window_id.to_string())
 .arg("-o")
 .arg("-t")
 .arg("png")
 .arg(&path)
Expand Down

32 changes: 29 additions & 3 deletions
crates/computer-use-mcp/src/backend/macos/mod.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
 ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
 ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
 root: &RootInfo,
 request: ObserveRequest,
 ) -> Result<RootObservation, BackendError> {
 let tree = if request.semantic {
 let mut tree = if request.semantic {
 ax::observe_tree(root)?
 } else {
 UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
 ..UiNode::default()
 }
 };
 let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
 let should_capture = match request.capture {
 CapturePolicy::Never => false,
 CapturePolicy::Always => true,
 CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
 CapturePolicy::IfSparse => should_ocr,
 };
 let screenshot_png = should_capture
 .then(|| capture::capture_window(root))
 .transpose()?;
 if should_ocr && let Some(png) = screenshot_png.as_deref() {
 match ocr::recognize_text(png) {
 Ok(recognized) => tree
 .children
 .extend(picture_only_nodes(root.frame, &recognized)),
 Err(error) => log::warn!("computer-use-mcp: {error}"),
 }
 }
 Ok(RootObservation {
 root: root.clone(),
 tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
 })
 }
 ActionKind::Click => {
 if request.target_picture_only {
 let frame = request
 .target_frame
 .filter(|frame| frame.has_area())
 .ok_or_else(|| {
 BackendError::new(
 BackendErrorCode::InvalidAction,
 "pictureOnly OCR target has no clickable frame",
 )
 })?;
 let (x, y) = frame.center();
 input::click(x, y, request.button, request.click_count)?;
 return Ok(ActionResult::unknown(
 "physical click events were posted at the pictureOnly OCR box center",
 ));
 }
 if request.target_path.is_some()
 && request.target_actions.iter().any(|a| a == "press")
 {
Expand Down

57 changes: 57 additions & 0 deletions
crates/computer-use-mcp/src/backend/macos/ocr.rs

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,57 @@
use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
 VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
 let image_data = NSData::with_bytes(png);
 let options = NSDictionary::new();
 let handler = VNImageRequestHandler::initWithData_options(
 VNImageRequestHandler::alloc(),
 &image_data,
 &options,
 );
 let request = VNRecognizeTextRequest::new();
 request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
 request.setUsesLanguageCorrection(true);
 request.setAutomaticallyDetectsLanguage(true);
 let request_base: &VNRequest = request.as_ref();
 let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
 handler
 .performRequests_error(&requests)
 .map_err(|error| vision_error(error.localizedDescription().to_string()))?;

 let Some(observations) = request.results() else {
 return Ok(Vec::new());
 };
 Ok(observations
 .to_vec()
 .into_iter()
 .filter_map(|observation| {
 let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
 // SAFETY: Vision produced this observation, and `boundingBox` is
 // a value-returning accessor whose CGRect ABI is bound by objc2.
 let bounding_box = unsafe { observation.boundingBox() };
 Some(RecognizedTextBox {
 text: candidate.string().to_string(),
 normalized_frame: Frame {
 x: bounding_box.origin.x,
 y: bounding_box.origin.y,
 w: bounding_box.size.width,
 h: bounding_box.size.height,
 },
 })
 })
 .collect())
}

fn vision_error(detail: String) -> BackendError {
 BackendError::new(
 BackendErrorCode::ObservationFailed,
 format!("Vision text recognition failed: {detail}"),
 )
}

4 changes: 2 additions & 2 deletions
crates/computer-use-mcp/src/lib.rs

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -3,8 +3,8 @@
//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)
#256
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14 changes: 14 additions & 0 deletions
Cargo.lock

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14 changes: 14 additions & 0 deletions
crates/computer-use-mcp/Cargo.toml

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Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
 "alloc",
 "NSArray",
 "NSData",
 "NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
 "objc2-core-foundation",
 "VNObservation",
 "VNRecognizeTextRequest",
 "VNRequest",
 "VNRequestHandler",
] }

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
 pub target_role: Option<String>,
 pub target_title: Option<String>,
 pub target_actions: Vec<String>,
 pub target_picture_only: bool,
 pub x: Option<f64>,
 pub y: Option<f64>,
 pub text: Option<String>,
Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/ax.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
 actions,
 enabled,
 focused,
 picture_only: false,
 children: Vec::new(),
 };

Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/capture.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
 .arg("-x")
 .arg("-l")
 .arg(root.window_id.to_string())
 .arg("-o")
 .arg("-t")
 .arg("png")
 .arg(&path)
Expand Down

32 changes: 29 additions & 3 deletions
crates/computer-use-mcp/src/backend/macos/mod.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
 ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
 ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
 root: &RootInfo,
 request: ObserveRequest,
 ) -> Result<RootObservation, BackendError> {
 let tree = if request.semantic {
 let mut tree = if request.semantic {
 ax::observe_tree(root)?
 } else {
 UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
 ..UiNode::default()
 }
 };
 let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
 let should_capture = match request.capture {
 CapturePolicy::Never => false,
 CapturePolicy::Always => true,
 CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
 CapturePolicy::IfSparse => should_ocr,
 };
 let screenshot_png = should_capture
 .then(|| capture::capture_window(root))
 .transpose()?;
 if should_ocr && let Some(png) = screenshot_png.as_deref() {
 match ocr::recognize_text(png) {
 Ok(recognized) => tree
 .children
 .extend(picture_only_nodes(root.frame, &recognized)),
 Err(error) => log::warn!("computer-use-mcp: {error}"),
 }
 }
 Ok(RootObservation {
 root: root.clone(),
 tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
 })
 }
 ActionKind::Click => {
 if request.target_picture_only {
 let frame = request
 .target_frame
 .filter(|frame| frame.has_area())
 .ok_or_else(|| {
 BackendError::new(
 BackendErrorCode::InvalidAction,
 "pictureOnly OCR target has no clickable frame",
 )
 })?;
 let (x, y) = frame.center();
 input::click(x, y, request.button, request.click_count)?;
 return Ok(ActionResult::unknown(
 "physical click events were posted at the pictureOnly OCR box center",
 ));
 }
 if request.target_path.is_some()
 && request.target_actions.iter().any(|a| a == "press")
 {
Expand Down

57 changes: 57 additions & 0 deletions
crates/computer-use-mcp/src/backend/macos/ocr.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,57 @@
use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
 VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
 let image_data = NSData::with_bytes(png);
 let options = NSDictionary::new();
 let handler = VNImageRequestHandler::initWithData_options(
 VNImageRequestHandler::alloc(),
 &image_data,
 &options,
 );
 let request = VNRecognizeTextRequest::new();
 request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
 request.setUsesLanguageCorrection(true);
 request.setAutomaticallyDetectsLanguage(true);
 let request_base: &VNRequest = request.as_ref();
 let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
 handler
 .performRequests_error(&requests)
 .map_err(|error| vision_error(error.localizedDescription().to_string()))?;

 let Some(observations) = request.results() else {
 return Ok(Vec::new());
 };
 Ok(observations
 .to_vec()
 .into_iter()
 .filter_map(|observation| {
 let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
 // SAFETY: Vision produced this observation, and `boundingBox` is
 // a value-returning accessor whose CGRect ABI is bound by objc2.
 let bounding_box = unsafe { observation.boundingBox() };
 Some(RecognizedTextBox {
 text: candidate.string().to_string(),
 normalized_frame: Frame {
 x: bounding_box.origin.x,
 y: bounding_box.origin.y,
 w: bounding_box.size.width,
 h: bounding_box.size.height,
 },
 })
 })
 .collect())
}

fn vision_error(detail: String) -> BackendError {
 BackendError::new(
 BackendErrorCode::ObservationFailed,
 format!("Vision text recognition failed: {detail}"),
 )
}

4 changes: 2 additions & 2 deletions
crates/computer-use-mcp/src/lib.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -3,8 +3,8 @@
//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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feat(computer-use): OCR pictureOnly fallback (macOS Vision)#256

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Already on GitHub?
Sign in
to your account

 Merged

Tryanks
merged 1 commit into

from

Aug 22, 2026
 Merged


feat(computer-use): OCR pictureOnly fallback (macOS Vision)
#256
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14 changes: 14 additions & 0 deletions
Cargo.lock

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14 changes: 14 additions & 0 deletions
crates/computer-use-mcp/Cargo.toml

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -26,3 +26,17 @@ tcode-core = { path = "../core" }
[target.'cfg(target_os = "macos")'.dependencies]
core-foundation = "0.10"
core-graphics = { version = "0.25", features = ["highsierra"] }
objc2 = { version = "0.6.4", default-features = false, features = ["std"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = [
 "alloc",
 "NSArray",
 "NSData",
 "NSDictionary",
] }
objc2-vision = { version = "0.3.2", default-features = false, features = [
 "objc2-core-foundation",
 "VNObservation",
 "VNRecognizeTextRequest",
 "VNRequest",
 "VNRequestHandler",
] }

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -116,6 +116,7 @@ pub struct ActionRequest {
 pub target_role: Option<String>,
 pub target_title: Option<String>,
 pub target_actions: Vec<String>,
 pub target_picture_only: bool,
 pub x: Option<f64>,
 pub y: Option<f64>,
 pub text: Option<String>,
Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/ax.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -397,6 +397,7 @@ fn walk_element(
 actions,
 enabled,
 focused,
 picture_only: false,
 children: Vec::new(),
 };

Expand Down

1 change: 1 addition & 0 deletions
crates/computer-use-mcp/src/backend/macos/capture.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,6 +15,7 @@ pub(super) fn capture_window(root: &RootInfo) -> Result<Vec<u8>, BackendError> {
 .arg("-x")
 .arg("-l")
 .arg(root.window_id.to_string())
 .arg("-o")
 .arg("-t")
 .arg("png")
 .arg(&path)
Expand Down

32 changes: 29 additions & 3 deletions
crates/computer-use-mcp/src/backend/macos/mod.rs

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
mod ax;
mod capture;
mod input;
mod ocr;

use std::collections::HashMap;
use std::ffi::c_void;
Expand All@@ -20,7 +21,7 @@ use super::{
 ActionKind, ActionRequest, ActionResult, BackendError, BackendErrorCode, CapturePolicy,
 ObserveRequest, RootFilters, RootInfo, RootObservation,
};
use crate::outline::{UiNode, interactive_count};
use crate::outline::{UiNode, picture_only_nodes, should_fallback_to_ocr};

pub(super) struct MacosBackend;

Expand DownExpand Up@@ -97,7 +98,7 @@ impl MacosBackend {
 root: &RootInfo,
 request: ObserveRequest,
 ) -> Result<RootObservation, BackendError> {
 let tree = if request.semantic {
 let mut tree = if request.semantic {
 ax::observe_tree(root)?
 } else {
 UiNode {
Expand All@@ -108,14 +109,23 @@ impl MacosBackend {
 ..UiNode::default()
 }
 };
 let should_ocr = request.capture != CapturePolicy::Never && should_fallback_to_ocr(&tree);
 let should_capture = match request.capture {
 CapturePolicy::Never => false,
 CapturePolicy::Always => true,
 CapturePolicy::IfSparse => interactive_count(&tree) <= 3,
 CapturePolicy::IfSparse => should_ocr,
 };
 let screenshot_png = should_capture
 .then(|| capture::capture_window(root))
 .transpose()?;
 if should_ocr && let Some(png) = screenshot_png.as_deref() {
 match ocr::recognize_text(png) {
 Ok(recognized) => tree
 .children
 .extend(picture_only_nodes(root.frame, &recognized)),
 Err(error) => log::warn!("computer-use-mcp: {error}"),
 }
 }
 Ok(RootObservation {
 root: root.clone(),
 tree,
Expand All@@ -137,6 +147,22 @@ impl MacosBackend {
 })
 }
 ActionKind::Click => {
 if request.target_picture_only {
 let frame = request
 .target_frame
 .filter(|frame| frame.has_area())
 .ok_or_else(|| {
 BackendError::new(
 BackendErrorCode::InvalidAction,
 "pictureOnly OCR target has no clickable frame",
 )
 })?;
 let (x, y) = frame.center();
 input::click(x, y, request.button, request.click_count)?;
 return Ok(ActionResult::unknown(
 "physical click events were posted at the pictureOnly OCR box center",
 ));
 }
 if request.target_path.is_some()
 && request.target_actions.iter().any(|a| a == "press")
 {
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crates/computer-use-mcp/src/backend/macos/ocr.rs

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use objc2::AnyThread;
use objc2_foundation::{NSArray, NSData, NSDictionary};
use objc2_vision::{
 VNImageRequestHandler, VNRecognizeTextRequest, VNRequest, VNRequestTextRecognitionLevel,
};

use super::super::{BackendError, BackendErrorCode};
use crate::outline::{Frame, RecognizedTextBox};

pub(super) fn recognize_text(png: &[u8]) -> Result<Vec<RecognizedTextBox>, BackendError> {
 let image_data = NSData::with_bytes(png);
 let options = NSDictionary::new();
 let handler = VNImageRequestHandler::initWithData_options(
 VNImageRequestHandler::alloc(),
 &image_data,
 &options,
 );
 let request = VNRecognizeTextRequest::new();
 request.setRecognitionLevel(VNRequestTextRecognitionLevel::Accurate);
 request.setUsesLanguageCorrection(true);
 request.setAutomaticallyDetectsLanguage(true);
 let request_base: &VNRequest = request.as_ref();
 let requests = NSArray::<VNRequest>::from_slice(&[request_base]);
 handler
 .performRequests_error(&requests)
 .map_err(|error| vision_error(error.localizedDescription().to_string()))?;

 let Some(observations) = request.results() else {
 return Ok(Vec::new());
 };
 Ok(observations
 .to_vec()
 .into_iter()
 .filter_map(|observation| {
 let candidate = observation.topCandidates(1).to_vec().into_iter().next()?;
 // SAFETY: Vision produced this observation, and `boundingBox` is
 // a value-returning accessor whose CGRect ABI is bound by objc2.
 let bounding_box = unsafe { observation.boundingBox() };
 Some(RecognizedTextBox {
 text: candidate.string().to_string(),
 normalized_frame: Frame {
 x: bounding_box.origin.x,
 y: bounding_box.origin.y,
 w: bounding_box.size.width,
 h: bounding_box.size.height,
 },
 })
 })
 .collect())
}

fn vision_error(detail: String) -> BackendError {
 BackendError::new(
 BackendErrorCode::ObservationFailed,
 format!("Vision text recognition failed: {detail}"),
 )
}

4 changes: 2 additions & 2 deletions
crates/computer-use-mcp/src/lib.rs

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//! refs, transactional actions). See `docs/computer-use.md` for the design.
//!
//! Served over the shared loopback streamable-HTTP host with a distinct bearer
//! token. The macOS backend talks to the AX C API, CGEvent, and `screencapture`;
//! other platforms report that computer use is unsupported.
//! token. The macOS backend talks to the AX C API, CGEvent, `screencapture`,
//! and Vision OCR; other platforms report that computer use is unsupported.

pub mod backend;
pub mod config;
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