* fix: update Go CI workflow and fix formatting issues
- Update Go version from 1.21.x to 1.24.x to match go.mod requirements
- Fix Go module cache path to use linux/go.sum instead of **/go.sum
- Run gofmt on all Go files to fix formatting issues
- Fix benchmark files formatting
- Fix linux/pkg/api/server.go formatting
This resolves the GitHub Actions CI failures related to:
- Missing go.sum file (wrong cache path)
- Go version mismatch
- Code formatting violations
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix: add platform-specific syscall.Select wrappers for Linux/Darwin compatibility
- Create select_linux.go: handles syscall.Select returning (n int, err error)
- Create select_darwin.go: handles syscall.Select returning (err error)
- Update select.go to use platform-agnostic selectCall function
- Resolves typecheck errors while maintaining compatibility on both platforms
Tested on both macOS and Linux targets successfully.
---------
Co-authored-by: Claude <noreply@anthropic.com>
- Run go fmt on all Go files (10 files formatted)
- Fix 50+ errcheck issues by adding proper error handling
- Fix 3 staticcheck issues (empty branches, error string capitalization)
- Remove 2 unused struct fields
- Install and configure golangci-lint v2.1.6 for Go 1.24 compatibility
- All linting now passes with 0 issues
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-authored-by: Claude <noreply@anthropic.com>
* fix: optimize Go server CPU usage from 500%+ to efficient levels
Major performance improvements to resolve excessive CPU consumption:
**Critical Fixes:**
- Remove WebSocket busy loop that caused continuous CPU spinning
- Fix microsecond-level polling (100μs → 10ms) reducing 100x operations
- Replace ps subprocess calls with efficient kill(pid,0) syscalls
- Increase timer intervals (1s → 30s) for session status checks
**Optimizations:**
- Control FIFO polling: 100ms → 1s intervals
- Select timeout: 100ms → 1s to reduce unnecessary wakeups
- Smart status caching: skip checks for already-exited sessions
- Remove unused imports (os/exec, strconv)
**Impact:**
- Eliminates tight loops causing 10,000+ operations per second
- Reduces subprocess overhead from frequent ps command executions
- Changes from polling-based to efficient event-driven architecture
- Expected CPU usage reduction from 500%+ to levels comparable with Node.js version
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
* fix: prevent WebSocket channel close panic with sync.Once
- Add sync.Once to prevent double-closing of done channel
- Update handleTextMessage signature to accept close function
- Use closeOnceFunc for safe channel closure across goroutines
Fixes panic: 'close of closed channel' in WebSocket handler
* feat: add --do-not-allow-column-set flag to disable resizing for spawned sessions
**New Flag:**
- `--do-not-allow-column-set` (default: true) - Disables terminal resizing for spawned shells
- Only affects sessions created with `spawn_terminal=true`
- Detached sessions (command-line, API without spawn) always allow resizing
**Implementation:**
- Add `IsSpawned` field to session.Config and session.Info structs
- Track whether session was spawned in terminal vs detached
- Server checks flag + spawn status before allowing resize operations
- Returns descriptive error for blocked resize attempts
**Behavior:**
- Spawned sessions: Resize blocked when flag enabled (default)
- Detached sessions: Always allow resizing regardless of flag
- Existing sessions preserve their resize capabilities
**API Response for blocked resize:**
```json
{
"success": false,
"message": "Resizing is disabled for spawned sessions",
"error": "resize_disabled_for_spawned_sessions"
}
```
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
* feat: extend --do-not-allow-column-set flag to block ALL session resizing
**Breaking Change:** Flag now affects both spawned AND detached sessions
**Changes:**
- Remove `sess.IsSpawned()` check in resize handler
- Block resizing for ALL sessions when flag is enabled (default: true)
- Update flag description: "Disable terminal resizing for all sessions (spawned and detached)"
- Update error message: "Terminal resizing is disabled by server configuration"
- Update error code: "resize_disabled_by_server"
**New Behavior:**
- `--do-not-allow-column-set=true` (default): NO resizing for any session type
- `--do-not-allow-column-set=false`: Allow resizing for all session types
- Applies uniformly to both spawned terminal windows and detached CLI sessions
**API Response for blocked resize:**
```json
{
"success": false,
"message": "Terminal resizing is disabled by server configuration",
"error": "resize_disabled_by_server"
}
```
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude <noreply@anthropic.com>
