feat: Phase 2.7+3 — full integration, config update, systemd unit

- Wire all goroutines in main.go: watcher, quota monitor, account
  switcher, dispatcher, janitor, and 10s state flush loop
- Add missing sections to config.example.yaml: notifications,
  dispatcher, watcher, janitor
- Add scripts/claude-failover.service systemd unit

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/janitor/janitor.go

@@ -0,0 +1,199 @@
+// Package janitor provides a periodic cleanup goroutine for the claude-failover
+// daemon. It removes orphaned dispatch-meta files, rewrites agent-queue
+// status.json with accurate filesystem counters, and deletes stale
+// /tmp/agent-done-* files.
+package janitor
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+
+	"forge.secuaas.ovh/olivier/claude-failover/internal/state"
+)
+
+const defaultInterval = 5 * time.Minute
+
+// agentQueueStatus mirrors the JSON written to .agent-queue/status.json.
+// Only the counter fields and state/current_task are managed here.
+type agentQueueStatus struct {
+	State       string  `json:"state"`
+	CurrentTask *string `json:"current_task"`
+	LastHB      string  `json:"last_heartbeat"`
+	InboxCount  int     `json:"inbox_count"`
+	DoneCount   int     `json:"done_count"`
+	FailedCount int     `json:"failed_count"`
+}
+
+// Janitor runs periodic filesystem cleanup tasks.
+type Janitor struct {
+	state       *state.State
+	projectsDir string
+	interval    time.Duration
+	logger      *log.Logger
+}
+
+// New returns a Janitor with the default 5-minute interval.
+func New(s *state.State, projectsDir string) *Janitor {
+	return &Janitor{
+		state:       s,
+		projectsDir: projectsDir,
+		interval:    defaultInterval,
+		logger:      log.New(os.Stderr, "[janitor] ", log.LstdFlags),
+	}
+}
+
+// Run starts the cleanup loop. It blocks until ctx is cancelled.
+func (j *Janitor) Run(ctx context.Context) {
+	ticker := time.NewTicker(j.interval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-ticker.C:
+			j.cleanup()
+		}
+	}
+}
+
+// cleanup performs a single cleanup pass.
+func (j *Janitor) cleanup() {
+	j.cleanupProjects()
+	j.cleanupStaleAgentDoneFiles()
+}
+
+// cleanupProjects iterates every project sub-directory inside projectsDir.
+func (j *Janitor) cleanupProjects() {
+	entries, err := os.ReadDir(j.projectsDir)
+	if err != nil {
+		if !os.IsNotExist(err) {
+			j.logger.Printf("readdir %s: %v", j.projectsDir, err)
+		}
+		return
+	}
+
+	// Build the set of session names currently working, keyed by task ID.
+	workingByTask := make(map[string]struct{})
+	j.state.ForEachWorking(func(_ string, sess *state.SessionState) {
+		if sess.Task != nil {
+			workingByTask[*sess.Task] = struct{}{}
+		}
+	})
+
+	for _, e := range entries {
+		if !e.IsDir() {
+			continue
+		}
+		projectDir := filepath.Join(j.projectsDir, e.Name())
+		inboxDir := filepath.Join(projectDir, ".agent-queue", "inbox")
+		doneDir := filepath.Join(projectDir, ".agent-queue", "done")
+		failedDir := filepath.Join(projectDir, ".agent-queue", "failed")
+
+		j.cleanupOrphanDispatchMeta(inboxDir, workingByTask)
+		j.rewriteStatusJSON(projectDir, inboxDir, doneDir, failedDir)
+	}
+}
+
+// cleanupOrphanDispatchMeta removes *.md.dispatch-meta files whose associated
+// task is no longer tracked by any working session.
+func (j *Janitor) cleanupOrphanDispatchMeta(inboxDir string, workingByTask map[string]struct{}) {
+	metas, err := filepath.Glob(filepath.Join(inboxDir, "*.md.dispatch-meta"))
+	if err != nil || len(metas) == 0 {
+		return
+	}
+	for _, metaPath := range metas {
+		// Derive the task name from the meta filename: strip the .dispatch-meta suffix.
+		taskFile := metaPath[:len(metaPath)-len(".dispatch-meta")]
+		taskName := filepath.Base(taskFile)
+		// Strip .md suffix to get bare task ID.
+		if len(taskName) > 3 {
+			taskName = taskName[:len(taskName)-3] // remove ".md"
+		}
+		if _, active := workingByTask[taskName]; !active {
+			j.logger.Printf("removing orphaned dispatch-meta: %s", metaPath)
+			if err := os.Remove(metaPath); err != nil && !os.IsNotExist(err) {
+				j.logger.Printf("remove %s: %v", metaPath, err)
+			}
+		}
+	}
+}
+
+// rewriteStatusJSON recalculates real filesystem counters and rewrites
+// .agent-queue/status.json, preserving state/current_task when agent is working.
+func (j *Janitor) rewriteStatusJSON(projectDir, inboxDir, doneDir, failedDir string) {
+	statusPath := filepath.Join(projectDir, ".agent-queue", "status.json")
+
+	inboxCount := countMDFiles(inboxDir)
+	doneCount := countMDFiles(doneDir)
+	failedCount := countMDFiles(failedDir)
+
+	// Read existing status to preserve agent-owned fields.
+	existing := agentQueueStatus{
+		State:       "idle",
+		CurrentTask: nil,
+	}
+	if data, err := os.ReadFile(statusPath); err == nil {
+		_ = json.Unmarshal(data, &existing)
+	}
+
+	// Only update counters; do NOT touch state/current_task if agent is working.
+	existing.InboxCount = inboxCount
+	existing.DoneCount = doneCount
+	existing.FailedCount = failedCount
+	existing.LastHB = time.Now().UTC().Format(time.RFC3339)
+
+	data, err := json.Marshal(existing)
+	if err != nil {
+		j.logger.Printf("marshal status.json for %s: %v", projectDir, err)
+		return
+	}
+	tmp := statusPath + ".tmp"
+	if err := os.WriteFile(tmp, data, 0644); err != nil {
+		j.logger.Printf("write tmp status.json for %s: %v", projectDir, err)
+		return
+	}
+	if err := os.Rename(tmp, statusPath); err != nil {
+		j.logger.Printf("rename status.json for %s: %v", projectDir, err)
+	}
+}
+
+// countMDFiles counts *.md files in dir that are NOT *.dispatched.
+func countMDFiles(dir string) int {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return 0
+	}
+	count := 0
+	for _, e := range entries {
+		name := e.Name()
+		if filepath.Ext(name) == ".md" {
+			count++
+		}
+	}
+	return count
+}
+
+// cleanupStaleAgentDoneFiles deletes /tmp/agent-done-* files older than 1 hour.
+func (j *Janitor) cleanupStaleAgentDoneFiles() {
+	matches, err := filepath.Glob("/tmp/agent-done-*")
+	if err != nil || len(matches) == 0 {
+		return
+	}
+	cutoff := time.Now().Add(-1 * time.Hour)
+	for _, path := range matches {
+		info, err := os.Stat(path)
+		if err != nil {
+			continue
+		}
+		if info.ModTime().Before(cutoff) {
+			j.logger.Printf("removing stale agent-done file: %s", path)
+			if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+				j.logger.Printf("remove %s: %v", path, err)
+			}
+		}
+	}
+}

internal/janitor/janitor_test.go

@@ -0,0 +1,96 @@
+package janitor
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"forge.secuaas.ovh/olivier/claude-failover/internal/state"
+)
+
+func TestNew(t *testing.T) {
+	s := state.New("/tmp/test-state.json")
+	j := New(s, "/tmp/projects")
+
+	if j == nil {
+		t.Fatal("New() returned nil")
+	}
+	if j.interval != defaultInterval {
+		t.Errorf("expected interval %v, got %v", defaultInterval, j.interval)
+	}
+	if j.state != s {
+		t.Error("state not assigned correctly")
+	}
+	if j.projectsDir != "/tmp/projects" {
+		t.Errorf("projectsDir not assigned correctly: %s", j.projectsDir)
+	}
+	if j.logger == nil {
+		t.Error("logger should not be nil")
+	}
+}
+
+func TestCleanupStaleAgentDoneFiles(t *testing.T) {
+	// Create a stale file (older than 1h).
+	staleFile := fmt.Sprintf("/tmp/agent-done-test-%d", time.Now().UnixNano())
+	if err := os.WriteFile(staleFile, []byte("done"), 0644); err != nil {
+		t.Fatalf("create stale file: %v", err)
+	}
+	// Age the file to 2 hours ago.
+	old := time.Now().Add(-2 * time.Hour)
+	if err := os.Chtimes(staleFile, old, old); err != nil {
+		t.Fatalf("chtimes: %v", err)
+	}
+
+	// Create a recent file (should NOT be deleted).
+	recentFile := fmt.Sprintf("/tmp/agent-done-test-recent-%d", time.Now().UnixNano())
+	if err := os.WriteFile(recentFile, []byte("recent"), 0644); err != nil {
+		t.Fatalf("create recent file: %v", err)
+	}
+	defer os.Remove(recentFile)
+
+	s := state.New("/tmp/test-state.json")
+	j := New(s, "/tmp/projects")
+	j.cleanupStaleAgentDoneFiles()
+
+	// Stale file should be gone.
+	if _, err := os.Stat(staleFile); !os.IsNotExist(err) {
+		os.Remove(staleFile)
+		t.Errorf("stale file %s should have been deleted", staleFile)
+	}
+
+	// Recent file should still exist.
+	if _, err := os.Stat(recentFile); os.IsNotExist(err) {
+		t.Errorf("recent file %s should NOT have been deleted", recentFile)
+	}
+}
+
+func TestCleanupOrphanDispatchMeta(t *testing.T) {
+	tmpDir := t.TempDir()
+	inboxDir := filepath.Join(tmpDir, ".agent-queue", "inbox")
+	if err := os.MkdirAll(inboxDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create a task file and its dispatch-meta.
+	taskFile := filepath.Join(inboxDir, "my-task.md")
+	metaFile := taskFile + ".dispatch-meta"
+	os.WriteFile(taskFile, []byte("task"), 0644)
+	os.WriteFile(metaFile, []byte("meta"), 0644)
+
+	s := state.New("/tmp/test-state.json")
+	j := New(s, tmpDir)
+
+	// No working sessions → dispatch-meta should be removed.
+	workingByTask := make(map[string]struct{})
+	j.cleanupOrphanDispatchMeta(inboxDir, workingByTask)
+
+	if _, err := os.Stat(metaFile); !os.IsNotExist(err) {
+		t.Errorf("orphan dispatch-meta %s should have been deleted", metaFile)
+	}
+	// Task file itself should still exist.
+	if _, err := os.Stat(taskFile); os.IsNotExist(err) {
+		t.Errorf("task file %s should NOT have been deleted", taskFile)
+	}
+}