fix(computer-use): drop the window border overlay, gate the cursor on foreground by Tryanks · Pull Request #319 · Tryanks/tcode

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.

Tryanks · 2026-09-02T20:42:58Z

Summary

Remove the glowing gradient window border overlay (border.rs and its ffi/geometry helpers). It was drawn on every action and only ever hidden when the show_agent_cursor setting was toggled off, so it lingered on screen indefinitely.
The cursor panel still tracks every action (input is delivered in the background) but is only visible while the target app is frontmost. A 200 ms main-queue poll (dispatch_after_f) re-checks the frontmost pid so the cursor hides as soon as the user switches away and reappears in place when they switch back. The poll disarms when the target process exits or the overlay is disabled.
First show lands the panel directly on the action point instead of animating in from off-screen.
overlay/ shrinks from 1265 to 925 lines; #![allow(dead_code)] removed.

Verification

cargo fmt --all --check, cargo clippy -p computer-use-mcp --all-targets -- -D warnings, cargo test -p computer-use-mcp (42 passed), cargo build pass locally.
Manual: a throwaway probe clicked the centre of a TextEdit window and ran [NSApp run]; screenshots show the cursor at the click point while TextEdit is frontmost, gone after activating Finder, and back in place after re-activating TextEdit.

… custom window Claude models now default the Context Window option to their native window (200k for Sonnet 4.6 / Opus 4.6, 1M for Fable 5/5.1, Opus 5, Sonnet 5, Opus 4.7/4.8; the latter two gain the option). Selecting the default emits no launch flags; a smaller window is passed as `--settings {"autoCompactWindow":N}` and `[1m]` is only appended to expand a native-200k model. The picker gains a Custom row with an inline input (500k / 500000 / 500, 100k–1M). Changing the window while the provider is live restarts it before the next turn and records a `ContextWindowChanged` timeline divider under the user message. The composer's context meter is clamped to the selected window.

… foreground The agent overlay drew a four-layer glowing gradient border around the target window on every action and never hid it (`clear()` only ran when the setting was switched off), so borders lingered on screen indefinitely. Remove the border entirely. The cursor panel keeps tracking every action (input is delivered in the background), but is only ordered on screen while the target app is frontmost. A 200 ms main-queue poll re-evaluates the foreground app so the cursor hides the moment the user switches away and reappears in place when they switch back; the poll disarms when the target exits or the overlay is disabled. The first show lands the panel directly on the action point instead of sliding in from off-screen. overlay/: 1265 → 925 lines.