Reviewing files that changed from the base of the PR and between 299b7ce and c2e017b.

• src/macos/accessibility.rs (4 hunks)
• src/macos/cgwindow.rs (2 hunks)
• src/macos/window_system.rs (4 hunks)
• src/window_manager.rs (6 hunks)

src/macos/cgwindow.rs (11)

129-132: LGTM!

The workspace ID extraction is implemented correctly with a reasonable default value of 1.

---

136-138: Good debug logging additions!

The enhanced debug messages provide valuable context for understanding window filtering decisions.

Also applies to: 143-145

---

148-153: LGTM! Good additions to the system apps exclusion list.

Including "Menubar", "Menu Bar", and "SystemPreferences" ensures these system UI elements won't be incorrectly tiled.

---

159-163: Good improvement to system panel filtering logic!

The more specific condition (empty title AND system-related owner) reduces false positives while still filtering out system panels effectively.

---

111-113: LGTM! Owner PID extraction implemented correctly.

The extraction of owner process ID from the window dictionary follows the established pattern and provides valuable metadata for window management operations.

---

129-131: LGTM! Workspace ID detection properly implemented.

The workspace ID extraction from the window dictionary replaces the previous hardcoded default and enables proper workspace-aware window management. The fallback to workspace 1 is reasonable for cases where the workspace information is unavailable.

---

136-137: Enhanced debug logging improves troubleshooting capabilities.

The added debug logging for filtered windows provides valuable insights into why specific windows are excluded from management, which will help with debugging and fine-tuning the filtering logic.

Also applies to: 143-144

---

149-153: Expanded system application filtering improves tiling behavior.

The addition of "Menubar", "Menu Bar", and "SystemPreferences" to the never-tile applications list is a good enhancement that prevents inappropriate tiling attempts on system UI elements.

---

160-162: Refined system window filtering with improved logging.

The updated filtering logic for system panels is more precise, checking for empty titles combined with system-related owners or very short owner names. The debug logging helps track which windows are being filtered out.

---

165-165: Comprehensive success logging aids in debugging.

The debug log for successfully parsed windows provides visibility into the window detection process, including the newly captured workspace information.

---

171-171: Window struct properly updated with new metadata fields.

The Window struct construction correctly incorporates the newly extracted owner_pid and workspace_id fields, enabling enhanced window management capabilities throughout the application.

Also applies to: 175-175

src/macos/window_system.rs (2)

133-137: Good debug logging additions!

The enhanced logging provides valuable insights into window discovery and workspace tracking.

Also applies to: 158-158

---

11-15:

❓ Verification inconclusive

⚠️ Using undocumented private macOS APIs - verify compatibility and add error handling.

The CGSGetActiveSpace and CGSMainConnectionID functions are private CoreGraphics APIs that are not officially documented or supported by Apple. This raises several concerns:

1. These APIs could change or be removed in future macOS versions
2. The function signatures might not be correct
3. There's no verification that these symbols exist at runtime

Consider adding runtime symbol verification or implementing a fallback mechanism if these functions are not available.

Run the following script to check if these symbols are exported in the CoreGraphics framework:

---

🏁 Script executed:

#!/bin/bash
# Check if the CGS functions are exported in CoreGraphics framework
nm -g /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics | grep -E "CGSGetActiveSpace|CGSMainConnectionID" || echo "Symbols not found in CoreGraphics framework"

# Alternative: Check in SkyLight framework where these might actually be located
if [ -f /System/Library/PrivateFrameworks/SkyLight.framework/SkyLight ]; then
    echo "Checking SkyLight framework..."
    nm -g /System/Library/PrivateFrameworks/SkyLight.framework/SkyLight | grep -E "CGSGetActiveSpace|CGSMainConnectionID" || echo "Symbols not found in SkyLight framework"
fi

Length of output: 385

---

⚠️ Private macOS APIs: verify existence and add runtime checks

The extern "C" declarations for CGSGetActiveSpace and CGSMainConnectionID reference undocumented CoreGraphics/SkyLight functions that Apple can change or remove at any time. This may lead to signature mismatches or missing symbols at runtime, causing crashes.

We attempted to locate these symbols using nm in the sandbox but couldn’t (no nm available). Please verify on a macOS host:

# Preferred: use otool to inspect exported symbols
if [ -f "/System/Library/PrivateFrameworks/SkyLight.framework/SkyLight" ]; then
  otool -ov /System/Library/PrivateFrameworks/SkyLight.framework/SkyLight \
    | grep -E "CGSGetActiveSpace|CGSMainConnectionID" \
    || echo "Symbols not found in SkyLight"
else
  echo "SkyLight framework not found"
fi

# Fallback: use strings + grep
strings /System/Library/PrivateFrameworks/SkyLight.framework/SkyLight \
  | grep -E "CGSGetActiveSpace|CGSMainConnectionID" \
  || echo "Symbols not found"

Action items:

• Confirm these symbols exist in the targeted macOS version(s).
• Load them at runtime (e.g., via libloading) and wrap in Option<unsafe extern "C" fn…> so you can fall back gracefully if they’re missing.
• Document compatibility and any fallbacks for unsupported macOS releases.

Location: src/macos/window_system.rs (lines 11–15)

src/window_manager.rs (5)

18-18: LGTM!

The owner_pid field addition is consistent with the window metadata extraction in cgwindow.rs.

---

109-114: Good addition for initial window layout!

Applying layout to existing windows on startup ensures a consistent state when the window manager starts.

---

373-385: Good error handling for workspace detection!

The implementation gracefully handles workspace detection failures by logging a warning and continuing with the last known workspace.

---

409-415: Address the unreliable workspace detection issue.

The comment indicates workspace filtering is disabled due to unreliable detection. This is a significant limitation that should be addressed. Consider:

1. Investigating why workspace detection is unreliable
2. Implementing alternative workspace detection methods
3. Adding a configuration option to enable/disable workspace filtering

---

436-476: Excellent implementation of batch window movement with fallback!

The implementation:

• Attempts efficient batch movement first
• Falls back to individual moves with retries on failure
• Provides detailed logging for debugging
• Updates window state consistently

The retry logic with 3 attempts and 50ms delays is well-designed for handling transient failures.

src/macos/accessibility.rs (3)

2-57: LGTM! Well-structured FFI declarations.

The new imports and external C function declarations are properly structured for the enhanced window management functionality. The CGPoint and CGSize structs correctly match the Core Foundation ABI.

---

175-225: Enhanced window movement implementation looks good.

The rewritten method properly uses AXValue creation for direct window manipulation. Memory management is handled correctly with CFRelease calls for the created values.

However, verify that find_window_element can reliably locate the correct window element, as the current implementation appears simplified.

---

364-469: Excellent process enumeration implementation.

The PID enumeration with dynamic buffer resizing is well-handled:

• Proper loop with buffer doubling when needed
• Correct filtering of invalid PIDs (≤ 0)
• Good error handling for system call failures

The window enumeration by PID and tileability checking are also well-implemented with proper memory management.

Reviewing files that changed from the base of the PR and between c2e017b and 35d170a.

• src/hotkeys.rs (7 hunks)
• src/layout.rs (1 hunks)
• src/macos/accessibility.rs (5 hunks)
• src/macos/cgwindow.rs (7 hunks)
• src/macos/window_system.rs (4 hunks)
• src/window_manager.rs (10 hunks)

• src/layout.rs
• src/hotkeys.rs

• src/macos/window_system.rs
• src/macos/cgwindow.rs

src/window_manager.rs (4)

18-18: LGTM! Good addition for PID-based window management.

The owner_pid field enables better window identification and correlation with the Accessibility API's PID-based enumeration.

---

109-114: LGTM! Excellent startup initialization.

Applying the initial layout on startup ensures existing windows are properly tiled immediately, improving the user experience.

---

377-392: LGTM! Robust workspace detection with proper error handling.

The implementation gracefully handles workspace detection failures with warnings while continuing operation, preventing crashes in environments where workspace detection might be unreliable.

---

450-513: LGTM! Well-designed batch window movement with robust fallback.

The implementation provides optimal performance with batch operations while ensuring reliability through:

• Fallback to individual window moves on batch failure
• Retry logic (3 attempts) for transient failures
• Proper state synchronization after successful moves
• Comprehensive debug logging for troubleshooting

src/macos/accessibility.rs (4)

181-203: LGTM! Proper window movement with resource management.

The rewritten method correctly:

• Uses find_window_element to locate windows by ID
• Properly releases the retained element after use
• Provides clear debug logging for troubleshooting

---

205-228: LGTM! Properly implements window finding by ID.

This implementation correctly addresses the previous concern by:

• Actually using the window_id parameter to find specific windows
• Checking cache and refreshing as needed
• Properly retaining elements before returning them

This fixes the critical issue where the method previously ignored the window_id parameter.

---

718-736: LGTM! Proper memory management for cached window elements.

The implementation correctly:

• Retains window elements before caching (line 727)
• Releases them during cache refresh and in the Drop implementation
• Uses a stable window ID based on PID and index

This properly addresses the previous use-after-free concern.

---

492-503: LGTM! Correct element retention preventing dangling pointers.

The code properly retains window elements (line 498) before they're returned, ensuring they remain valid after the windows array is released. This prevents the use-after-free issue identified in previous reviews.

Reviewing files that changed from the base of the PR and between 35d170a and 0a93388.

• src/macos/accessibility.rs (5 hunks)
• src/macos/window_system.rs (4 hunks)
• src/window_manager.rs (10 hunks)

• src/macos/window_system.rs

src/window_manager.rs (5)

18-18: LGTM: Well-integrated owner_pid field addition.

The addition of the owner_pid field to the Window struct properly aligns with the accessibility manager's PID-based window identification strategy implemented in src/macos/accessibility.rs. This enhancement supports the improved window enumeration and batch operations.

---

109-113: Excellent startup enhancement for consistent window state.

Applying the initial layout to existing windows on startup ensures that the window manager maintains a consistent state from the beginning, rather than leaving pre-existing windows unmanaged until the next event.

---

115-121: Well-documented timer interval adjustment addresses past concerns.

The detailed comments explaining the rationale for different refresh intervals (1000ms for refresh vs 200ms for monitoring) and the TODO for making them configurable demonstrate good engineering practices. This addresses the inconsistency noted in past reviews.

---

380-394: Robust workspace detection with proper error handling.

The workspace detection logic properly handles both success and failure cases, logging workspace changes and gracefully handling errors without breaking the refresh flow.

---

453-515: Excellent batch operation implementation with robust fallback strategy.

The implementation properly:

• Attempts batch window movement first for efficiency
• Falls back to individual moves with retry logic (up to 3 attempts)
• Updates internal window state in both success and failure cases
• Provides comprehensive logging for debugging

The retry mechanism with 50ms delays and the proper state synchronization demonstrate good error handling practices.

src/macos/accessibility.rs (8)

139-145: Significant improvement in window ID generation.

The new hashing approach using multiple hash operations with different constants (0x9e3779b9, 0x85ebca6b) and combining PID with element pointer provides much better distribution and collision resistance compared to the previous simple pointer casting.

---

184-206: Excellent rewrite of move_window with proper accessibility API usage.

The new implementation properly:

• Searches for the window element using find_window_element
• Uses the dedicated set_window_rect helper for consistent positioning
• Manages Core Foundation references with proper CFRelease
• Provides clear error messaging when windows cannot be found

---

233-303: Well-designed batch window movement with precise window matching.

The implementation addresses the previous concern about window-to-layout mapping by:

• Building a HashMap for O(1) layout lookups by WindowId
• Grouping windows by PID for efficient enumeration
• Matching windows by PID and index within the PID group
• Properly managing Core Foundation references throughout the process

This ensures accurate window-to-layout correspondence.

---

305-360: Robust window positioning using proper AXValue creation.

The set_window_rect method properly:

• Creates AXValue objects for position and size using the correct Core Foundation types
• Handles null value creation failures gracefully
• Cleans up Core Foundation resources in all code paths
• Provides detailed error information for debugging

---

407-441: Comprehensive process enumeration with proper buffer management.

The get_all_running_pids implementation correctly:

• Uses dynamic buffer sizing to handle varying numbers of processes
• Properly handles the proc_listpids return value semantics
• Filters out invalid PIDs (≤ 0)
• Implements a growth strategy for insufficient buffer sizes

---

731-752: Enhanced window ID generation with collision detection.

The improved window ID generation now:

• Incorporates PID, array index, and element pointer for better uniqueness
• Detects and warns about ID collisions
• Implements a timestamp-based fallback for collision resolution

This addresses the stability concerns raised in past reviews.

---

659-667: Critical improvement: Proper Core Foundation resource management.

The cache refresh now properly releases all cached elements before clearing the cache, preventing resource leaks. This addresses the memory management concerns identified in previous reviews.

---

728-730:

✅ Verification successful

Verify CFRetain usage aligns with Core Foundation memory management.

The code retains window elements from CFArrayGetValueAtIndex before caching them, which is correct since the array will be released. However, ensure this doesn't create over-retention when combined with the existing cache cleanup logic.

Let me verify the Core Foundation reference counting patterns are consistent:

---

🏁 Script executed:

#!/bin/bash
# Description: Check CFRetain/CFRelease patterns in accessibility.rs

echo "=== CFRetain calls ==="
rg "CFRetain" src/macos/accessibility.rs -A 2 -B 2

echo "=== CFRelease calls ==="
rg "CFRelease" src/macos/accessibility.rs -A 2 -B 2

echo "=== Window cache insertions ==="
rg "window_cache\.insert" src/macos/accessibility.rs -A 2 -B 2

Length of output: 4478

---

No over-retention: CFRetain/CFRelease usage is balanced

I’ve verified that every call to CFRetain is paired with a corresponding CFRelease:

• In process_windows_array, elements retained for tiling are released in the loop over app_window_elements.
• Cache updates release old entries before inserting new ones, and the Drop implementation releases all retained window elements (and system_element) when the manager is torn down.

No further changes needed here.

Reviewing files that changed from the base of the PR and between 4829697 and 602e4be.

• src/layout.rs (5 hunks)
• src/lib.rs (1 hunks)
• src/macos/accessibility.rs (5 hunks)
• src/snap.rs (1 hunks)
• src/window_manager.rs (15 hunks)

• src/lib.rs

src/snap.rs (4)

1-32: LGTM!

The SnapRegion enum and its implementation are well-structured for representing the nine standard snap zones.

---

34-54: LGTM!

The struct definitions are well-designed with clear separation of concerns between detection bounds and snap target rectangles.

---

275-329: LGTM!

The drag tracking implementation uses conservative thresholds (500ms duration, 100px distance) which helps prevent accidental snapping. The double-check for position changes is a good safeguard.

---

331-393: LGTM!

The snap target finding logic correctly prioritizes corner zones over edges and center, which provides intuitive snapping behavior. The utility methods are well-implemented.

src/window_manager.rs (1)

468-531: Excellent implementation of batch window movement with fallback.

The implementation properly attempts batch movement first and falls back to individual moves with retry logic. The error handling and logging are comprehensive.

src/layout.rs (2)

80-204: Excellent BSP tree enhancements!

The implementation includes:

• Proper recursive rectangle updates maintaining tree consistency
• Clever spiral layout using alternating split directions by depth
• Correct tree collapsing logic when removing windows
• Efficient window containment checking

The alternating split pattern creates an intuitive i3/sway-like layout behavior.

---

246-268: LGTM!

The window management methods properly handle BSP tree lifecycle, including creation when needed and cleanup when empty.

src/macos/accessibility.rs (9)

139-145: Improved window ID generation addresses previous concerns.

The new hash-based approach using FNV-like multiplication and combining PID with element pointer is a significant improvement over the previous raw pointer casting. This reduces collision probability while maintaining reasonable performance.

However, as noted in previous reviews, this still has inherent limitations with pointer reuse and AX element lifecycle. Consider the web search recommendation about using _AXUIElementGetWindow for more stable CGWindowID extraction when feasible.

---

184-208: Well-structured window movement with proper error handling.

The refactored move_window method properly separates concerns by delegating to find_window_element and set_window_rect. The graceful handling of missing windows with debug logging instead of hard failures is appropriate for window management scenarios.

---

210-233: Proper resource management in window element lookup.

The find_window_element method correctly handles CFRetain/CFRelease for returned elements and implements a reasonable fallback strategy with cache refresh. This addresses the previous review concern about ignoring the window_id parameter.

---

235-305: Batch window movement logic addresses previous mapping concerns.

The new implementation correctly maintains window ID to layout mapping using a HashMap lookup rather than sequential application. The PID-based grouping and index-within-PID matching strategy is more robust than the previous approach.

The resource cleanup at lines 292-296 properly releases retained window elements to prevent leaks.

---

307-362: Robust window positioning with proper AXValue usage.

The set_window_rect method correctly uses AXValue creation for Core Graphics types and implements proper resource cleanup. The error handling captures both position and size operation results.

---

463-524: Comprehensive window enumeration with proper filtering.

The get_windows_for_app_by_pid method implements good practices:

• Early return for invalid PIDs
• Proper resource management with CFRetain for elements
• Window tileability validation
• Comprehensive cleanup

---

526-556: Window tileability check ensures movement compatibility.

The is_window_tileable method properly validates that windows have the required position and size attributes before attempting to manage them. The resource cleanup for temporary values is handled correctly.

---

762-773: Drop implementation properly releases cached resources.

The Drop implementation correctly iterates through cached window elements and releases them, preventing resource leaks when the AccessibilityManager is destroyed.

---

489-489:

❓ Verification inconclusive

Verify Core Foundation array API usage.

The code uses core_foundation::array::CFArrayRef and related functions, but I need to verify this is the correct way to access these APIs in the core_foundation crate.

Also applies to: 724-724

---

🏁 Script executed:

#!/bin/bash
# Check if the core_foundation crate exports array functions as used
rg -A 3 "CFArrayRef\|CFArrayGetCount\|CFArrayGetValueAtIndex" --type rust

Length of output: 75

---

Verify Core Foundation array API usage

Please confirm that the core_foundation crate you depend on exposes the raw CFArray APIs you’re casting to—namely CFArrayRef, CFArrayGetCount, and CFArrayGetValueAtIndex. A codebase search won’t surface definitions for external crates, so double-check against the crate’s documentation or your local core-foundation source.

Locations to verify:

• src/macos/accessibility.rs: line 489
• src/macos/accessibility.rs: line 724

Reviewing files that changed from the base of the PR and between 602e4be and 9d754d4.

• src/bin/skew-cli.rs (0 hunks)
• src/config.rs (1 hunks)
• src/focus.rs (1 hunks)
• src/hotkeys.rs (8 hunks)
• src/ipc.rs (2 hunks)
• src/layout.rs (8 hunks)
• src/macos/accessibility.rs (9 hunks)
• src/macos/cgwindow.rs (8 hunks)
• src/macos/window_system.rs (7 hunks)
• src/main.rs (1 hunks)
• src/plugins.rs (1 hunks)
• src/snap.rs (1 hunks)
• src/window_manager.rs (15 hunks)

• src/bin/skew-cli.rs

• src/main.rs
• src/plugins.rs
• src/config.rs
• src/ipc.rs

• src/hotkeys.rs
• src/macos/cgwindow.rs
• src/macos/window_system.rs
• src/window_manager.rs

src/focus.rs (1)

341-344: Clean refactoring of the backward cycling logic!

The simplified approach with explicit edge case handling is more readable and maintainable than modulo arithmetic.

src/macos/accessibility.rs (3)

177-201: Excellent refactoring of the move_window method!

The implementation properly manages element lifecycles with retain/release and gracefully handles missing windows without failing the operation.

---

228-298: Well-designed batch window movement with proper window-to-layout mapping!

The implementation correctly addresses the window matching concern by:

• Grouping windows by PID
• Matching window elements to layout rectangles using PID-specific indexing
• Properly managing element lifecycles with retain/release

This approach ensures each window gets its intended layout position.

---

300-357: Robust implementation of window rect setting!

The method properly creates and manages AXValue objects with correct cleanup on all paths, including error cases.

src/snap.rs (1)

295-332: Excellent use of conservative thresholds for snap detection!

The implementation prevents unintended snapping with:

• 500ms minimum drag duration
• 100px minimum drag distance
• Additional 10px threshold to avoid redundant moves

This ensures snapping only occurs for clearly intentional window movements.

src/layout.rs (10)

5-5: Good addition for debugging support.

Adding the Debug derive trait will improve debugging capabilities for the LayoutType enum.

---

80-115: Solid rectangle update implementation.

The update_rect and update_child_rects methods correctly handle rectangle calculations for BSP tree nodes. The logic properly splits rectangles horizontally and vertically based on the split ratio.

---

159-171: Efficient window counting implementation.

The recursive window counting logic is correct and handles both leaf and container nodes appropriately.

---

221-233: Clean window containment check.

The contains_window method correctly traverses the tree to check for window existence.

---

276-298: Well-structured window management methods.

The add_window and remove_window methods for LayoutManager properly coordinate with the BSP tree, including cleanup when the tree becomes empty.

---

443-443: Correct float layout implementation.

Using w.rect directly for floating windows is the correct approach, as floating windows should maintain their current positions.

---

460-460: Good use of div_ceil for grid calculations.

The div_ceil method provides cleaner ceiling division logic for grid row calculations.

---

605-605: Excellent bounds checking for split ratio.

Using clamp(0.1, 0.9) ensures the split ratio stays within reasonable bounds, preventing edge cases where windows become too small.

---

117-157:

❌ Incorrect review comment

Review the spiral layout insertion logic.

The insertion logic implements alternating splits based on depth, but there may be a conceptual issue with the spiral pattern.

let should_split_horizontal = depth % 2 == 0;

This creates alternating splits (vertical, then horizontal), but the comment mentions "new windows go right, then down" which suggests a different pattern. Consider verifying that this depth-based alternating approach produces the intended spiral effect.

---

🏁 Script executed:

#!/bin/bash
# Description: Check if there are any tests or documentation for spiral layout behavior
# to verify the intended insertion pattern

rg -A 10 -B 5 "spiral.*layout|spiral.*pattern" --type rust

Length of output: 3572

---

🏁 Script executed:

#!/bin/bash
# Extract the full implementation of compute_spiral_layout for review
rg -A200 "fn compute_spiral_layout" --type rust

Length of output: 7346

---

Ignore insertion logic for Spiral layout — it isn’t used by compute_spiral_layout.

The insert_window_with_depth routine builds the BSP tree for BSP layouts only. The Spiral layout’s compute_spiral_layout function ignores that tree entirely, laying out windows directly from the windows slice and split_ratio. The depth-based split logic has no effect on Spiral, so this review comment can be dismissed.

Likely an incorrect or invalid review comment.

---

173-219:

❓ Verification inconclusive

Verify the newer Rust syntax compatibility.

The tree collapsing logic uses some newer Rust methods that may require verification:

.is_some_and(|left| left.remove_window(window_id))
.is_none_or(|n| n.count_windows() == 0)

These methods were introduced in recent Rust versions. Ensure the project's MSRV (Minimum Supported Rust Version) supports these methods.

---

🏁 Script executed:

#!/bin/bash
# Description: Check the project's Rust version requirements and verify method availability

# Check Cargo.toml for rust-version or edition
fd Cargo.toml --exec cat {} \; | grep -E "rust-version|edition"

# Check if is_some_and and is_none_or are available in the target Rust version
# is_some_and was stabilized in Rust 1.70.0
# is_none_or was stabilized in Rust 1.82.0
echo "Note: is_some_and requires Rust 1.70.0+, is_none_or requires Rust 1.82.0+"

Length of output: 242

---

Verify the project’s MSRV before using is_some_and and is_none_or

The code on src/layout.rs lines 173–219 uses:

.is_some_and(|left| left.remove_window(window_id))   // stabilised in Rust 1.70.0
.is_none_or(|n| n.count_windows() == 0)              // stabilised in Rust 1.82.0

Cargo.toml currently only declares:

edition = "2021"

Please ensure the Minimum Supported Rust Version (MSRV) is at least 1.82.0. You can either:

• Add a rust-version = "1.82.0" field to Cargo.toml
• Or, if you must support older toolchains, replace these with equivalent expressions, e.g.:

  .as_mut().map_or(false, |left| left.remove_window(window_id))
  .as_ref().map_or(true, |n| n.count_windows() == 0)

Reviewing files that changed from the base of the PR and between 9d754d4 and 6ad7d81.

• src/macos/accessibility.rs (9 hunks)
• src/macos/cgwindow.rs (8 hunks)
• src/macos/window_system.rs (7 hunks)
• src/main.rs (2 hunks)
• src/snap.rs (1 hunks)
• src/window_manager.rs (17 hunks)

• src/main.rs

• src/macos/cgwindow.rs
• src/macos/window_system.rs

src/window_manager.rs (4)

19-19: LGTM: Well-integrated owner_pid field.

The addition of owner_pid to the Window struct aligns perfectly with the enhanced window identification in the macOS accessibility layer and supports more accurate window management.

---

69-69: LGTM: Smart defensive programming with programmatic move tracking.

The snap_manager integration and programmatically_moving set provide an elegant solution to prevent recursive snap handling when the manager itself moves windows.

Also applies to: 75-76

---

488-491: Good defensive programming: Marking all windows before batch move.

The pattern of marking all windows as programmatically_moving before the batch operation ensures consistent snap conflict prevention even if the batch operation partially fails.

---

496-556: Robust fallback strategy for batch window movements.

The implementation properly handles batch move failures by falling back to individual moves with retry logic. The detailed logging helps with debugging layout application issues.

src/macos/accessibility.rs (1)

244-314: Improved batch window movement with proper PID-based matching.

The new implementation correctly matches windows by PID and index rather than global ordering, addressing the previous window-to-layout mapping issue. The resource management with CFRetain/CFRelease is also properly handled.

Reviewing files that changed from the base of the PR and between 6ad7d81 and 90659af.

• src/macos/accessibility.rs (9 hunks)
• src/snap.rs (1 hunks)
• src/window_manager.rs (17 hunks)

src/snap.rs (2)

249-250: Good implementation of configurable snap thresholds.

The snap threshold is now properly used for both time and distance calculations, addressing the previous issue where hardcoded values were used instead of the constructor parameter.

---

333-398: Well-structured snap target detection with clear priority.

The method correctly prioritizes corners over edges over center, which provides intuitive snapping behavior. The extensive debug logging will be helpful for troubleshooting snap behavior.

src/window_manager.rs (4)

130-136: Excellent documentation of refresh interval decisions.

The detailed comment explaining the different intervals (1000ms for refresh vs 200ms for monitoring) and suggesting future configurability addresses the previous concern about inconsistent intervals.

---

583-586: Good implementation of timer cancellation.

The addition of timer cancellation logic properly addresses the race condition issue identified in previous reviews. This ensures only the latest drag-end check runs.

---

496-558: Excellent batch window movement implementation with fallback.

The implementation properly attempts batch window moves first, then falls back to individual moves with retry logic if the batch operation fails. This provides both performance optimization and reliability.

---

686-687: Good threshold for avoiding redundant snap moves.

The 5-pixel threshold prevents unnecessary window movements when the snap position is very close to the current position, improving user experience.

src/macos/accessibility.rs (14)

2-13: LGTM - Import fixes resolve compilation issues.

The addition of core_foundation::array imports fixes the previous compilation errors, and the new proc_listpids function declaration is necessary for system-wide process enumeration functionality.

---

15-66: LGTM - Standard macOS API constants and structures.

These additions correctly define the necessary constants and structures for Core Foundation and Accessibility API integration.

---

134-141: Improved window ID generation approach.

The change from raw pointer casting to the generate_window_id method addresses previous stability concerns with window identification. The new approach incorporates PID and hash-based generation for more reliable window IDs.

---

174-214: Excellent robust window movement implementation.

The rewritten method properly handles cache refreshing, includes a fallback mechanism using CGWindow data for brute force searching, and has correct memory management with appropriate CFRelease calls. This addresses previous concerns about window finding reliability.

---

216-239: Well-implemented window element finder.

This method correctly implements window finding with proper cache management, memory safety through CFRetain calls, and appropriate fallback to cache refresh when windows aren't found.

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241-311: Excellent batch window movement implementation.

This method properly addresses the previous window-to-layout mapping concerns by grouping windows by PID and matching by index within each PID. The memory management is correct with proper CFRelease calls, and the error handling is comprehensive.

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313-370: Correct implementation of window positioning.

The method properly uses AXValue objects for setting window position and size, includes appropriate error checking, and handles memory management correctly with CFRelease calls for all created AXValue objects.

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372-461: Comprehensive window enumeration implementation.

The process enumeration correctly implements buffer management with safety limits to prevent infinite loops. The approach of enumerating all running processes provides comprehensive window discovery capability.

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463-487: Good deprecation practice.

The deprecated methods are properly marked with version information and provide clear migration guidance while maintaining backward compatibility.

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489-581: Solid PID-based window enumeration.

The implementation properly filters system processes, checks window tileability through attribute verification, and handles memory management correctly with appropriate CFRetain/CFRelease calls.

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677-729: Well-designed cache refresh mechanism.

The cache refresh methods properly handle memory cleanup, include throttling to prevent excessive refreshes, and provide appropriate fallback mechanisms. The 100ms throttling prevents performance issues while maintaining responsiveness.

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731-886: Comprehensive window finding and rect extraction.

These methods properly implement window finding through multiple strategies and correctly extract actual values from AXValue objects, addressing previous concerns about incomplete value extraction. Memory management is handled appropriately throughout.

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888-1042: Robust enumeration and caching with collision handling.

The implementation correctly handles window enumeration across all applications, includes collision detection with fallback ID generation, and properly manages memory with CFRetain for cached elements. The hash-based window ID generation incorporating PID and index provides good uniqueness.

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1045-1055: Proper resource cleanup in Drop implementation.

The Drop implementation correctly releases all cached window elements and the system element, ensuring proper cleanup of Core Foundation resources and preventing memory leaks.

Reviewing files that changed from the base of the PR and between 90659af and 7ecc811.

• llms.txt (1 hunks)
• src/snap.rs (1 hunks)

llms.txt (1)

1-81: Excellent comprehensive project documentation!

This documentation provides valuable context for the tiling window manager project, covering architecture, dependencies, development workflow, and important considerations. The structure is clear and will be very helpful for contributors and maintainers.

🧰 Tools

🪛 LanguageTool

[style] ~9-~9: This phrase is redundant (‘I’ stands for ‘Interface’). Use simply “CLIInterface”.
Context: ...ssibility APIs. ## Key Components - CLI Interface (main.rs): Command-line entry point...

(ACRONYM_TAUTOLOGY)

---

[grammar] ~17-~17: The operating system from Apple is written “macOS”.
Context: ...ng integration - macOS Integration (macos/): Accessibility API bindings, Core Gr...

(MAC_OS)

---

[uncategorized] ~56-~56: You might be missing the article “the” here.
Context: ...for window operations - Integrates with macOS window system through Accessibility bin...

(AI_EN_LECTOR_MISSING_DETERMINER_THE)

Reviewing files that changed from the base of the PR and between 7ecc811 and 8667112.

• src/macos/mod.rs (1 hunks)
• src/macos/window_notifications.rs (1 hunks)
• src/snap.rs (1 hunks)
• src/window_manager.rs (14 hunks)

• src/macos/mod.rs

• src/snap.rs

Reviewing files that changed from the base of the PR and between 8667112 and ad066c8.

• src/macos/window_notifications.rs (1 hunks)
• src/window_manager.rs (14 hunks)

src/macos/window_notifications.rs (1)

260-277: PID extraction implementation looks correct.

The updated implementation properly extracts the process ID using the NSRunningApplication API, which addresses the previous concern about the hardcoded placeholder value.

The approach using msg_send![window, app] followed by msg_send![app, runningApplication] and then msg_send![running_app, processIdentifier] is the correct way to get the owner PID from an NSWindow.

src/window_manager.rs (5)

134-140: Well-documented refresh interval configuration.

The detailed comments explaining the refresh timer intervals and suggesting future configuration options provide excellent context for the design decisions. The 1000ms refresh interval is now properly justified in relation to the 200ms monitoring interval.

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405-438: Effective workspace detection improves reliability.

The new get_effective_current_workspace method provides a robust fallback mechanism that prioritizes focused window workspace, then most common workspace, and finally the stored workspace. This addresses workspace detection reliability issues.

The implementation correctly handles edge cases and provides clear debug logging for workspace detection decisions.

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577-640: Batch window movement with proper fallback.

The implementation attempts to use the new move_all_windows method for efficiency, with appropriate fallback to individual moves. The retry logic with exponential backoff is well-implemented.

The error handling gracefully degrades performance while maintaining functionality, and the logging provides good visibility into which approach was used.

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646-763: Comprehensive drag end handling implementation.

The handle_drag_end method properly integrates with the snap manager and handles all drag result types (snap, swap, return, no action). The programmatic move tracking prevents recursive drag detection.

The implementation correctly:

• Uses effective workspace for collision detection
• Marks windows as programmatically moving to prevent recursive snapping
• Updates internal state after moves
• Clears drag state when complete

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511-515: Window position tracking initialization.

Good practice to initialize position tracking for new windows during refresh. This ensures drag detection works correctly for all windows from the start.

Reviewing files that changed from the base of the PR and between ad066c8 and 24e06cc.

• src/snap.rs (1 hunks)
• src/window_manager.rs (15 hunks)

• src/window_manager.rs

src/snap.rs (6)

1-4: Clean imports and dependencies.

The module imports are well-organized and include only necessary dependencies.

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5-32: Well-designed SnapRegion enum with helpful utilities.

The enum covers all necessary screen regions for comprehensive window snapping, and the name() method provides useful string representations for debugging.

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41-47: DragResult enum effectively models all drag outcomes.

The enum variants appropriately handle the different scenarios: snapping, swapping (with original rect preservation), returning to original position, and no action.

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82-230: Well-structured zone configuration system.

The current implementation using a zones array with tuple configurations is much more maintainable than repetitive hardcoded zone creation. The helper method create_absolute_zone_rect provides good abstraction for coordinate handling.

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497-521: Efficient window detection algorithm.

The find_window_under_drag method uses a simple center-point collision detection which is appropriate for the use case and efficiently excludes the dragged window itself.

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523-537: Clean utility methods with appropriate interfaces.

The getter methods and state management functions provide a clean interface for external consumers while maintaining proper encapsulation.

Reviewing files that changed from the base of the PR and between 24e06cc and 39cb029.

• src/snap.rs (1 hunks)
• src/window_manager.rs (15 hunks)

• src/snap.rs

src/window_manager.rs (12)

5-5: LGTM! New imports and Window struct enhancement look good.

The additions integrate well with the overall architecture:

• Window drag notifications import enables native macOS drag detection
• Snap manager import provides the snapping functionality
• The owner_pid field addition aligns with the enhanced window metadata extraction mentioned in the AI summary

Also applies to: 8-8, 20-20

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69-88: Well-designed state tracking for drag management.

The new fields effectively separate concerns:

• snap_manager handles snapping logic
• drag_observer and drag_event_rx enable native drag detection
• State tracking sets (programmatically_moving, user_dragging_windows) prevent feedback loops
• previous_window_positions enables proper drag distance calculations

This design should prevent the race conditions mentioned in past reviews.

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102-130: Solid initialization with proper error handling.

The setup correctly:

• Initializes drag observer with error propagation
• Sets reasonable snap threshold (50px)
• Properly initializes all state tracking collections
• Uses screen rect for snap manager bounds

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141-171: Good improvements to startup and event loop.

Positive changes:

• Initial layout application ensures consistent startup state
• Drag event handling integrates cleanly into the main loop
• The interval documentation addresses past review concerns

The TODO comment about making intervals configurable is helpful for future improvement.

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196-214: Excellent move event handling with proper state management.

The logic correctly differentiates between:

• Programmatic moves (cleanup and state update)
• NSWindow-tracked user drags (state update only)
• Other user moves (immediate snap processing)

This should eliminate the feedback loop issues mentioned in past reviews.

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269-269: Consistent programmatic move tracking prevents feedback loops.

The pattern of marking windows as programmatically_moving before repositioning them is correctly applied across all relevant commands. This ensures these moves won't trigger unintended snapping behavior.

Also applies to: 291-293, 326-326, 350-352

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384-412: Well-implemented drag event handling with good integration.

The method correctly:

• Tracks user drag state via user_dragging_windows
• Integrates with snap manager for drag tracking
• Processes drag end only for managed windows
• Includes helpful debug logging

The emoji logging adds good visual distinction for debugging drag operations.

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506-559: Well-implemented helper methods with consistent patterns.

Both swap_windows and return_window_to_original correctly:

• Mark windows as programmatically moving to prevent feedback
• Handle errors gracefully with appropriate logging
• Update internal state (previous_window_positions)
• Follow the established error handling patterns

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565-598: Excellent workspace detection with robust fallback strategy.

The multi-tier approach significantly improves reliability:

1. Focused window's workspace (most reliable)
2. Most common workspace among visible windows
3. Stored current workspace (fallback)

This addresses the workspace filtering concerns from past reviews and provides much more reliable workspace awareness.

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608-608: Consistent use of improved workspace detection.

The switch to get_effective_current_workspace() makes directional window navigation more reliable by using the enhanced workspace detection logic.

Also applies to: 613-613

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652-676: Good improvements to window refresh with better workspace tracking.

The enhancements include:

• Workspace change detection with proper logging
• Initial position tracking for new windows (prevents missing position data)
• Graceful error handling for workspace detection failures

These changes support the improved drag and positioning functionality.

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806-967: Comprehensive drag end handling with excellent error recovery.

The method expertly handles all drag scenarios:

• SnapToZone: Checks for redundant moves before snapping
• SwapWithWindow: Uses bulk moves with individual move fallback
• ReturnToOriginal: Restores previous position
• NoAction: No operation needed

The comprehensive logging and proper state cleanup (clear_drag_state) ensure reliable operation and prevent state leaks.

Reviewing files that changed from the base of the PR and between 39cb029 and 00b6a28.

• README.md (1 hunks)
• src/window_manager.rs (15 hunks)

• README.md

src/window_manager.rs (2)

20-20: Good addition for process-based window management.

The owner_pid field addition aligns well with the enhanced window enumeration and tracking capabilities mentioned in the PR summary.

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745-778: Excellent workspace detection strategy.

The fallback approach using focused window → most common workspace → stored value is a robust solution to the workspace detection reliability issues mentioned in previous reviews. The comprehensive logging will also help debug any remaining workspace detection problems.