Remove hexai-tmux-edit popup editor featurev0.42.0

The tmux popup editor and its per-agent detection (Cursor/Amp/Aider)
added maintenance surface without enough use to justify it; Codex and
Claude Code already support external-editor mode natively via Ctrl+G.
Drops internal/tmuxedit, cmd/hexai-tmux-edit, the [tmux_edit] config
schema, the Mage build target, and all related docs/README mentions.

Bump version to 0.42.0.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

1 files changed, 0 insertions, 111 deletions

diff --git a/internal/tmuxedit/history.go b/internal/tmuxedit/history.go
deleted file mode 100644
index eac3114..0000000
--- a/internal/tmuxedit/history.go
+++ /dev/null
@@ -1,111 +0,0 @@
-// Package tmuxedit provides JSONL-based history storage for tmux popup submissions.
-package tmuxedit
-
-import (
-	"encoding/json"
-	"fmt"
-	"os"
-	"path/filepath"
-	"time"
-
-	"codeberg.org/snonux/hexai/internal/appconfig"
-	"codeberg.org/snonux/hexai/internal/textutil"
-)
-
-// HistoryEntry represents a single submission to the AI agent via tmux popup.
-// Stored in JSONL format (one JSON object per line) for easy appending and reading.
-type HistoryEntry struct {
-	Timestamp string `json:"timestamp"` // RFC3339 format
-	Agent     string `json:"agent"`     // AI agent name (e.g., "claude", "aider")
-	Cwd       string `json:"cwd"`       // Current working directory at submission time
-	Text      string `json:"text"`      // The submitted text
-}
-
-// AppendHistory appends a new history entry to the history file.
-// Uses atomic write pattern (write to temp file, then rename) for safety.
-func AppendHistory(text, agent, cwd string) error {
-	stateDir, err := appconfig.StateDir()
-	if err != nil {
-		return fmt.Errorf("cannot get state directory: %w", err)
-	}
-
-	historyPath := filepath.Join(stateDir, "tmux-edit-history.jsonl")
-
-	// Create entry with current timestamp
-	entry := HistoryEntry{
-		Timestamp: time.Now().Format(time.RFC3339),
-		Agent:     agent,
-		Cwd:       cwd,
-		Text:      text,
-	}
-
-	// Marshal to JSON
-	data, err := json.Marshal(entry)
-	if err != nil {
-		return fmt.Errorf("cannot marshal history entry: %w", err)
-	}
-
-	// Append newline for JSONL format
-	data = append(data, '\n')
-
-	// Open file in append mode, create if doesn't exist
-	f, err := os.OpenFile(historyPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644)
-	if err != nil {
-		return fmt.Errorf("cannot open history file: %w", err)
-	}
-	defer func() { _ = f.Close() }() // best-effort on error paths
-
-	// Write entry
-	if _, err := f.Write(data); err != nil {
-		return fmt.Errorf("cannot write history entry: %w", err)
-	}
-
-	// Check Close error to catch deferred-write failures (e.g. disk full).
-	return f.Close()
-}
-
-// GetHistory retrieves the most recent history entries (up to limit).
-// Returns entries in chronological order (oldest first).
-// If limit <= 0, returns all entries.
-func GetHistory(limit int) ([]HistoryEntry, error) {
-	stateDir, err := appconfig.StateDir()
-	if err != nil {
-		return nil, fmt.Errorf("cannot get state directory: %w", err)
-	}
-
-	historyPath := filepath.Join(stateDir, "tmux-edit-history.jsonl")
-
-	// Read entire file
-	data, err := os.ReadFile(historyPath)
-	if err != nil {
-		if os.IsNotExist(err) {
-			return []HistoryEntry{}, nil // Empty history is not an error
-		}
-		return nil, fmt.Errorf("cannot read history file: %w", err)
-	}
-
-	// Parse JSONL line by line
-	var entries []HistoryEntry
-	lines := textutil.SplitLinesBytes(data)
-	for i, line := range lines {
-		if len(line) == 0 {
-			continue // Skip empty lines
-		}
-
-		var entry HistoryEntry
-		if err := json.Unmarshal(line, &entry); err != nil {
-			// Log error but continue parsing (don't fail entire history on one bad line)
-			fmt.Fprintf(os.Stderr, "warning: cannot parse history entry at line %d: %v\n", i+1, err)
-			continue
-		}
-		entries = append(entries, entry)
-	}
-
-	// Apply limit if specified
-	if limit > 0 && len(entries) > limit {
-		// Return the most recent entries
-		entries = entries[len(entries)-limit:]
-	}
-
-	return entries, nil
-}