tmux

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v0.9.2 Latest Latest
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 Go to latest Published: Jan 31, 2026 License: MIT Imports: 21 Imported by: 0

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Index

Constants

View Source 
const SessionPrefix = "agentdeck_"

Variables

This section is empty.

Functions

func BindSwitchKey added in v0.8.43 

func BindSwitchKey(key, targetSession string) error

BindSwitchKey binds a number key to switch to target session. Uses prefix table (default) so Ctrl+b N works. The key should be a single character like "1", "2", etc. Deprecated: Use BindSwitchKeyWithAck for notification bar integration.

func BindSwitchKeyWithAck added in v0.8.52 

func BindSwitchKeyWithAck(key, targetSession, sessionID string) error

BindSwitchKeyWithAck binds a number key to switch to target session AND writes a signal file so agent-deck can acknowledge the session was selected. This enables proper acknowledgment when user presses Ctrl+b 1-6 shortcuts.

func CleanupOrphanedLogs added in v0.5.3 

func CleanupOrphanedLogs() (removed int, freedBytes int64, err error)

CleanupOrphanedLogs removes log files for sessions that no longer exist A log is considered orphaned if: 1. No tmux session with matching name exists 2. The log file is older than 1 hour (to avoid race conditions during session creation)

func ClearStatusLeft added in v0.8.43 

func ClearStatusLeft(sessionName string) error

ClearStatusLeft resets status-left to default for a session. Called when notifications are cleared or acknowledged.

func ClearStatusLeftGlobal added in v0.8.65 

func ClearStatusLeftGlobal() error

ClearStatusLeftGlobal resets status-left to default globally.

func DetectTerminal added in v0.3.0 

func DetectTerminal() string

DetectTerminal identifies the current terminal emulator from environment variables Returns terminal name: "warp", "iterm2", "kitty", "alacritty", "vscode", "windows-terminal", or "unknown"

func GetAckSignalPath added in v0.8.52 

func GetAckSignalPath() (string, error)

GetAckSignalPath returns the path to the acknowledgment signal file

func GetActiveSession added in v0.8.43 

func GetActiveSession() (string, error)

GetActiveSession returns the session name the user is currently attached to. Returns empty string and error if not attached to any session.

func GetAttachedSessions added in v0.8.65 

func GetAttachedSessions() ([]string, error)

GetAttachedSessions returns the names of tmux sessions that have clients attached. Used to detect which session the user is currently viewing.

func InitializeStatusBarOptions added in v0.8.67 

func InitializeStatusBarOptions() error

InitializeStatusBarOptions sets optimal status bar options for agent-deck. Fixes truncation by setting adequate status-left-length globally. Should be called once during startup.

func IsTmuxAvailable 

func IsTmuxAvailable() error

IsTmuxAvailable checks if tmux is installed and accessible Returns nil if tmux is available, otherwise returns an error with details

func ListAgentDeckSessions added in v0.8.62 

func ListAgentDeckSessions() ([]string, error)

ListAgentDeckSessions returns the names of all agentdeck tmux sessions. This is used to update notification bars across ALL sessions, not just those in the current profile. This ensures consistent notification bars when users switch between sessions.

func LogDir added in v0.3.0 

func LogDir() string

LogDir returns the directory containing all session logs

func ReadAndClearAckSignal added in v0.8.52 

func ReadAndClearAckSignal() string

ReadAndClearAckSignal reads the session ID from the signal file and deletes it. Returns empty string if no signal file exists or on error.

func RefreshExistingSessions added in v0.6.0 

func RefreshExistingSessions()

RefreshExistingSessions is an alias for RefreshSessionCache for backwards compatibility

func RefreshSessionCache added in v0.6.0 

func RefreshSessionCache()

RefreshSessionCache updates the cache of existing tmux sessions and their activity Call this ONCE per tick, then use Session.Exists() and Session.GetWindowActivity() which read from cache. This reduces 30+ subprocess spawns to just 1 per tick cycle.

NOTE: We use window_activity (not session_activity) because window_activity updates when there's actual terminal output, while session_activity only updates on session-level events. This is critical for detecting when Claude is actively working.

func RefreshStatusBarImmediate added in v0.8.67 

func RefreshStatusBarImmediate() error

RefreshStatusBarImmediate forces an immediate status bar redraw for ALL connected clients. This bypasses the status-interval timer (default 15s) for instant visual feedback. Uses -S flag which only refreshes the status line (lightweight operation ~1-2ms per client).

func RotateLog added in v0.3.0 

func RotateLog(sessionName string, maxSize int64) error

RotateLog truncates a session's log file if it exceeds maxSize

func RunLogMaintenance added in v0.5.3 

func RunLogMaintenance(maxSizeMB int, maxLines int, removeOrphans bool)

RunLogMaintenance performs all log maintenance tasks based on settings This should be called once at startup and optionally periodically

func SetStatusLeft added in v0.8.43 

func SetStatusLeft(sessionName, text string) error

SetStatusLeft sets the left side of tmux status bar for a session. Used by NotificationManager to display waiting session notifications.

func SetStatusLeftGlobal added in v0.8.65 

func SetStatusLeftGlobal(text string) error

SetStatusLeftGlobal sets the left side of tmux status bar globally. This is a MAJOR performance optimization: ONE tmux call instead of 100+. All agentdeck sessions inherit this global setting.

func SpinnerRuneSet added in v0.9.2 

func SpinnerRuneSet() []rune

spinnerRuneSet returns the full set of spinner runes for content normalization. Includes both the "active-only" chars (used for busy detection) and the additional chars (·, ✻) that appear in done/other states but still need stripping for stable hashing.

func StripANSI 

func StripANSI(content string) string

StripANSI removes ANSI escape codes from content using O(n) single-pass algorithm. This is important because terminal output contains color codes.

PERFORMANCE: Uses strings.Builder with pre-allocation for O(n) time complexity. Previous implementation used string concatenation in loops which was O(n²) and caused 2-11 second UI freezes on large terminal output (Issue #39).

NOTE: We intentionally avoid regex here because complex ANSI regex patterns can cause catastrophic backtracking on malformed escape sequences. 

func SupportsHyperlinks() bool

SupportsHyperlinks returns true if the current terminal supports OSC 8 hyperlinks

func TruncateLargeLogFiles added in v0.5.3 

func TruncateLargeLogFiles(maxSizeMB int, maxLines int) (truncated int, err error)

TruncateLargeLogFiles checks all log files and truncates any that exceed maxSizeMB

func TruncateLogFile added in v0.5.3 

func TruncateLogFile(logPath string, maxLines int) error

TruncateLogFile truncates a log file to keep only the last maxLines lines This is called when a log file exceeds maxSizeBytes

func UnbindKey added in v0.8.43 

func UnbindKey(key string) error

UnbindKey removes a key binding and restores default behavior. After unbinding, attempts to restore the default behavior where number keys select windows. The restore is best-effort since it may fail in environments without windows (e.g., CI) and agent-deck rebinds keys every 2s anyway.

Types

type LogWatcher added in v0.3.0 

type LogWatcher struct {
	// contains filtered or unexported fields
}

LogWatcher watches session log files for changes using fsnotify When a log file is modified, it triggers a callback with the session name

func NewLogWatcher added in v0.3.0 

func NewLogWatcher(logDir string, callback func(sessionName string)) (*LogWatcher, error)

NewLogWatcher creates a new log file watcher callback is called with the session name when its log file changes

func (*LogWatcher) Close added in v0.3.0 

func (lw *LogWatcher) Close() error

Close stops the watcher. Safe to call multiple times.

func (*LogWatcher) Start added in v0.3.0 

func (lw *LogWatcher) Start()

Start begins watching for file changes (blocking) Call this in a goroutine

type PromptDetector 

type PromptDetector struct {
	// contains filtered or unexported fields
}

PromptDetector checks for tool-specific prompts in terminal content Based on Claude Squad's exact implementation: https://github.com/smtg-ai/claude-squad/blob/main/session/tmux/tmux.go

func NewPromptDetector 

func NewPromptDetector(tool string) *PromptDetector

NewPromptDetector creates a detector for the specified tool

func (*PromptDetector) HasPrompt 

func (d *PromptDetector) HasPrompt(content string) bool

HasPrompt checks if the terminal content contains a prompt waiting for input These patterns are derived from Claude Squad + additional research for edge cases

type RateLimiter added in v0.8.86 

type RateLimiter struct {
	// contains filtered or unexported fields
}

RateLimiter provides simple thread-safe rate limiting for events. It ensures that events are processed at most once per minimum interval.

func NewRateLimiter added in v0.8.86 

func NewRateLimiter(eventsPerSecond int) *RateLimiter

NewRateLimiter creates a new rate limiter with the specified events per second.

func (*RateLimiter) Allow added in v0.8.86 

func (rl *RateLimiter) Allow() bool

Allow returns true if the event should be allowed based on the rate limit.

func (*RateLimiter) Coalesce added in v0.8.86 

func (rl *RateLimiter) Coalesce(callback func())

Coalesce executes the provided callback only if the rate limit allows.

type RawPatterns added in v0.9.2 

type RawPatterns struct {
	BusyPatterns   []string // plain strings + "re:" prefixed regex
	PromptPatterns []string
	SpinnerChars   []string
	WhimsicalWords []string
}

RawPatterns holds string-form patterns before compilation. Patterns prefixed with "re:" are compiled as regex; everything else uses strings.Contains.

func DefaultRawPatterns added in v0.9.2 

func DefaultRawPatterns(toolName string) *RawPatterns

DefaultRawPatterns returns the built-in detection patterns for a known tool. Returns nil for unknown tools (they have no defaults).

func MergeRawPatterns added in v0.9.2 

func MergeRawPatterns(defaults, overrides, extras *RawPatterns) *RawPatterns

MergeRawPatterns merges defaults with overrides and extras.

  • If overrides has a field set (non-nil slice, even if empty), it replaces the default.
  • extras fields are appended to the result (after defaults or overrides).
  • If defaults is nil, only overrides/extras are used.

type ResolvedPatterns added in v0.9.2 

type ResolvedPatterns struct {
	BusyStrings   []string
	BusyRegexps   []*regexp.Regexp
	PromptStrings []string
	PromptRegexps []*regexp.Regexp
	SpinnerChars  []string

	// Pre-built combo patterns (from WhimsicalWords + SpinnerChars)
	ThinkingPattern         *regexp.Regexp
	ThinkingPatternEllipsis *regexp.Regexp
	SpinnerActivePattern    *regexp.Regexp
}

ResolvedPatterns holds the compiled, ready-to-use patterns for status detection.

func CompilePatterns added in v0.9.2 

func CompilePatterns(raw *RawPatterns) (*ResolvedPatterns, error)

CompilePatterns compiles raw string patterns into ready-to-use ResolvedPatterns. Patterns prefixed with "re:" are compiled as regex. Invalid regex patterns are logged as warnings and skipped (never crash).

type Session 

type Session struct {
	Name        string
	DisplayName string
	WorkDir     string
	Command     string
	Created     time.Time
	InstanceID  string // Agent-deck instance ID for hook callbacks
	// contains filtered or unexported fields
}

Session represents a tmux session NOTE: All mutable fields are protected by mu. The Bubble Tea event loop is single-threaded, but we use mutex protection for defensive programming and future-proofing.

func DiscoverAllTmuxSessions 

func DiscoverAllTmuxSessions() ([]*Session, error)

DiscoverAllTmuxSessions returns all tmux sessions (including non-Agent Deck ones)

func ListAllSessions 

func ListAllSessions() ([]*Session, error)

ListAllSessions returns all Agent Deck tmux sessions

func NewSession 

func NewSession(name, workDir string) *Session

NewSession creates a new Session instance with a unique name

func ReconnectSession 

func ReconnectSession(tmuxName, displayName, workDir, command string) *Session

ReconnectSession creates a Session object for an existing tmux session This is used when loading sessions from storage - it properly initializes all fields needed for status detection to work correctly

Note: This runs immediate configuration (EnablePipePane, ConfigureStatusBar). For lazy loading during TUI startup, use ReconnectSessionLazy instead.

func ReconnectSessionLazy added in v0.8.95 

func ReconnectSessionLazy(tmuxName, displayName, workDir, command string, previousStatus string) *Session

ReconnectSessionLazy creates a Session object without running any tmux configuration. PERFORMANCE: This is used during TUI startup to avoid subprocess overhead. Non-essential configuration (EnableMouseMode, ConfigureStatusBar, EnablePipePane) is deferred until first user interaction via EnsureConfigured().

Use this for bulk session loading where immediate configuration is not needed. For sessions that need immediate configuration, use ReconnectSession or ReconnectSessionWithStatus.

func ReconnectSessionWithStatus 

func ReconnectSessionWithStatus(tmuxName, displayName, workDir, command string, previousStatus string) *Session

ReconnectSessionWithStatus creates a Session with pre-initialized state based on previous status This restores the exact status state across app restarts:

  • "idle" (gray): acknowledged=true, cooldown expired
  • "waiting" (yellow): acknowledged=false, cooldown expired
  • "active" (green): will be recalculated based on actual content changes

func (*Session) Acknowledge 

func (s *Session) Acknowledge()

Acknowledge marks the session as "seen" by the user Call this when user attaches to the session

func (*Session) AcknowledgeWithSnapshot 

func (s *Session) AcknowledgeWithSnapshot()

AcknowledgeWithSnapshot marks the session as seen and baselines the current content hash. Called when user detaches from session.

func (*Session) Attach 

func (s *Session) Attach(ctx context.Context) error

Attach attaches to the tmux session with full PTY support Ctrl+Q will detach and return to the caller

func (*Session) AttachReadOnly 

func (s *Session) AttachReadOnly(ctx context.Context) error

AttachReadOnly attaches to the session in read-only mode

func (*Session) CaptureFullHistory 

func (s *Session) CaptureFullHistory() (string, error)

CaptureFullHistory captures the scrollback history (limited to last 2000 lines for performance)

func (*Session) CapturePane 

func (s *Session) CapturePane() (string, error)

CapturePane captures the visible pane content. Uses singleflight to deduplicate concurrent subprocess calls (TOCTOU fix).

func (*Session) ConfigureStatusBar added in v0.3.0 

func (s *Session) ConfigureStatusBar()

ConfigureStatusBar sets up the tmux status bar with session info Shows: notification bar on left (managed by NotificationManager), session info on right NOTE: status-left is reserved for the notification bar showing waiting sessions This function only configures status-right to avoid overwriting notification bar

func (*Session) DetectTool 

func (s *Session) DetectTool() string

DetectTool detects which AI coding tool is running in the session Uses caching to avoid re-detection on every call

func (*Session) DisablePipePane added in v0.3.0 

func (s *Session) DisablePipePane() error

DisablePipePane disables pipe-pane logging

func (*Session) EnableMouseMode 

func (s *Session) EnableMouseMode() error

EnableMouseMode enables mouse scrolling, clipboard integration, and optimal settings Safe to call multiple times - just sets the options again

Enables: - mouse on: Mouse wheel scrolling, text selection, pane resizing - set-clipboard on: OSC 52 clipboard integration (works with modern terminals) - allow-passthrough on: OSC 8 hyperlinks, advanced escape sequences (tmux 3.2+) - history-limit 10000: Large scrollback buffer for AI agent output - escape-time 10: Fast Vim/editor responsiveness (default 500ms is too slow)

Terminal compatibility: - Warp, iTerm2, kitty, Alacritty, WezTerm: Full support (hyperlinks, clipboard, true color) - Windows Terminal, VS Code: Full support - Apple Terminal.app: Limited (no hyperlinks or clipboard)

Note: With mouse mode on, hold Shift while selecting to use native terminal selection instead of tmux's selection (useful for copying to system clipboard in some terminals)

func (*Session) EnablePipePane added in v0.3.0 

func (s *Session) EnablePipePane() error

EnablePipePane enables tmux pipe-pane to stream output to a log file This is used for event-driven status detection via fsnotify

func (*Session) EnsureConfigured added in v0.8.95 

func (s *Session) EnsureConfigured()

EnsureConfigured runs deferred tmux configuration if not already done. PERFORMANCE: This should be called before attaching to a session or when the session needs full functionality (e.g., status bar, mouse mode).

Safe to call multiple times - does nothing if already configured or session doesn't exist. Thread-safe via mutex protection.

func (*Session) Exists 

func (s *Session) Exists() bool

Exists checks if the tmux session exists Uses cached session list when available (refreshed by RefreshExistingSessions) Falls back to direct tmux call if cache is stale

func (*Session) ForceDetectTool 

func (s *Session) ForceDetectTool() string

ForceDetectTool forces a re-detection of the tool, ignoring cache

func (*Session) GetEnvironment added in v0.5.0 

func (s *Session) GetEnvironment(key string) (string, error)

GetEnvironment gets an environment variable from this tmux session. Uses a 30-second cache to avoid spawning tmux show-environment subprocesses on every poll cycle. Call InvalidateEnvCache() after SetEnvironment to clear.

func (*Session) GetLastActivityTime added in v0.5.6 

func (s *Session) GetLastActivityTime() time.Time

GetLastActivityTime returns when the session content last changed Returns zero time if no activity has been tracked

func (*Session) GetStatus 

func (s *Session) GetStatus() (string, error)

GetStatus returns the current status of the session

Activity-based 3-state model with spike filtering: 

GREEN (active)   = Sustained activity (2+ changes in 1s) within cooldown
YELLOW (waiting) = Cooldown expired, NOT acknowledged (needs attention)
GRAY (idle)      = Cooldown expired, acknowledged (user has seen it)

Key insight: Status bar updates cause single timestamp changes (spikes). Real AI work causes multiple timestamp changes over 1 second (sustained). This filters spikes to prevent false GREEN flashes.

Logic: 1. Check busy indicator (immediate GREEN if present) 2. Get activity timestamp (fast ~4ms) 3. If timestamp changed → check if sustained or spike

  • Sustained (1+ more changes in 1s) → GREEN
  • Spike (no more changes) → filtered (no state change)

4. Check cooldown → GREEN if within 5. Cooldown expired → YELLOW or GRAY based on acknowledged

func (*Session) GetWaitingSince added in v0.8.51 

func (s *Session) GetWaitingSince() time.Time

GetWaitingSince returns when the session transitioned to waiting status Returns zero time if session has never been waiting

func (*Session) GetWindowActivity added in v0.3.0 

func (s *Session) GetWindowActivity() (int64, error)

GetWindowActivity returns Unix timestamp of last tmux window activity Uses cached data when available (refreshed by RefreshSessionCache) Falls back to direct tmux call if cache is stale

func (*Session) GetWorkDir 

func (s *Session) GetWorkDir() string

GetWorkDir returns the current working directory of the tmux pane This is the live directory from the pane, not the initial WorkDir

func (*Session) HasUpdated 

func (s *Session) HasUpdated() (bool, error)

HasUpdated checks if the pane content has changed since last check

func (*Session) InvalidateEnvCache added in v0.9.2 

func (s *Session) InvalidateEnvCache()

InvalidateEnvCache clears the environment variable cache for this session. Should be called after SetEnvironment to ensure fresh reads.

func (*Session) IsClaudeRunning added in v0.5.3 

func (s *Session) IsClaudeRunning() bool

IsClaudeRunning checks if Claude appears to be running in the session Returns true if Claude indicators are found

func (*Session) IsConfigured added in v0.8.95 

func (s *Session) IsConfigured() bool

IsConfigured returns whether the session has been fully configured. Used for debugging and testing.

func (*Session) Kill 

func (s *Session) Kill() error

Kill terminates the tmux session. Like RespawnPane, this captures the process tree first and ensures all processes actually die. tmux kill-session sends SIGHUP which some CLI tools (e.g. Claude Code 2.1.27+) ignore, leaving orphan processes.

func (*Session) LogFile added in v0.3.0 

func (s *Session) LogFile() string

LogFile returns the path to this session's pipe-pane log file Logs are stored in ~/.agent-deck/logs/<session-name>.log

func (*Session) ResetAcknowledged 

func (s *Session) ResetAcknowledged()

ResetAcknowledged marks the session as needing attention Call this when a hook event indicates the agent finished (Stop, AfterAgent) This ensures the session shows yellow (waiting) instead of gray (idle)

func (*Session) Resize 

func (s *Session) Resize(cols, rows int) error

Resize changes the terminal size of the tmux session

func (*Session) RespawnPane added in v0.5.4 

func (s *Session) RespawnPane(command string) error

RespawnPane kills the current process in the pane and starts a new command. This is more reliable than sending Ctrl+C and waiting for shell prompt. The -k flag kills the current process before respawning.

IMPORTANT: After respawn, this function verifies that old processes actually died. Some CLI tools (notably Claude Code 2.1.27+) ignore SIGHUP sent by tmux respawn-pane, leaving orphan processes that consume CPU indefinitely. If old processes survive, we escalate through SIGTERM → SIGKILL.

func (*Session) SendCommand added in v0.5.1 

func (s *Session) SendCommand(command string) error

SendCommand sends a command to the tmux session and presses Enter

func (*Session) SendCtrlC added in v0.5.1 

func (s *Session) SendCtrlC() error

SendCtrlC sends Ctrl+C (interrupt signal) to the tmux session

func (*Session) SendCtrlU added in v0.5.3 

func (s *Session) SendCtrlU() error

SendCtrlU sends Ctrl+U (clear line) to the tmux session

func (*Session) SendEnter 

func (s *Session) SendEnter() error

SendEnter sends an Enter key to the tmux session

func (*Session) SendKeys 

func (s *Session) SendKeys(keys string) error

SendKeys sends keys to the tmux session Uses -l flag to treat keys as literal text, preventing tmux special key interpretation

func (*Session) SendKeysChunked added in v0.8.80 

func (s *Session) SendKeysChunked(content string) error

SendKeysChunked sends large content to the tmux session in chunks to avoid tmux/OS buffer limits. Content ≤4KB is sent directly via SendKeys. Larger content is split at newline boundaries with a short delay between chunks.

func (*Session) SetCustomPatterns added in v0.8.27 

func (s *Session) SetCustomPatterns(toolName string, busyPatterns, promptPatterns, detectPatterns []string)

SetCustomPatterns sets custom patterns for generic tool support These patterns enable custom tools defined in config.toml to have proper status detection

func (*Session) SetDetectPatterns added in v0.9.2 

func (s *Session) SetDetectPatterns(toolName string, detectPatterns []string)

SetDetectPatterns sets tool auto-detection patterns (separate from busy/prompt patterns).

func (*Session) SetEnvironment added in v0.5.0 

func (s *Session) SetEnvironment(key, value string) error

SetEnvironment sets an environment variable for this tmux session

func (*Session) SetPatterns added in v0.9.2 

func (s *Session) SetPatterns(p *ResolvedPatterns)

SetPatterns sets the compiled ResolvedPatterns for configurable status detection. When set, hasBusyIndicator and normalizeContent use these instead of hardcoded values.

func (*Session) SignalFileActivity added in v0.3.0 

func (s *Session) SignalFileActivity()

SignalFileActivity signals that file output was detected (from LogWatcher) This directly triggers GREEN status by updating the cooldown timer Call this when pipe-pane log file is written to

func (*Session) Start 

func (s *Session) Start(command string) error

Start creates and starts a tmux session

func (*Session) StreamOutput 

func (s *Session) StreamOutput(ctx context.Context, w io.Writer) error

StreamOutput streams the session output to the provided writer

func (*Session) WaitForReady added in v0.7.0 

func (s *Session) WaitForReady(timeout time.Duration) bool

WaitForReady polls the terminal until the agent is ready for input Ready state = NO busy indicator AND prompt visible This works for Claude ("> "), Gemini, and other agents

func (*Session) WaitForShellPrompt added in v0.5.3 

func (s *Session) WaitForShellPrompt(timeout time.Duration) bool

WaitForShellPrompt polls the terminal until a shell prompt is detected Returns true if shell prompt found, false if timeout Shell prompts: $, #, %, ❯, ➜, or bare > at end of line

type SessionState 

type SessionState string

SessionState represents the detected state of a session 

const (
	StateIdle    SessionState = "idle"    // No activity, waiting for user
	StateBusy    SessionState = "busy"    // Actively working (output changing)
	StateWaiting SessionState = "waiting" // Showing a prompt, needs input
)

type StateTracker 

type StateTracker struct {
	// contains filtered or unexported fields
}

StateTracker tracks content changes for notification-style status detection

StateTracker implements a simple 3-state model: 

GREEN (active)   = Content changed within 2 seconds
YELLOW (waiting) = Content stable, user hasn't seen it
GRAY (idle)      = Content stable, user has seen it

type TerminalInfo added in v0.3.0 

type TerminalInfo struct {
	Name              string // Terminal name (warp, iterm2, kitty, alacritty, etc.)
	SupportsOSC8      bool   // Supports OSC 8 hyperlinks
	SupportsOSC52     bool   // Supports OSC 52 clipboard
	SupportsTrueColor bool   // Supports 24-bit color
}

TerminalInfo contains detected terminal information

func GetTerminalInfo added in v0.3.0 

func GetTerminalInfo() TerminalInfo

GetTerminalInfo returns detailed terminal capabilities

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