feat(nodes): SSH bootstrap + housekeeping — install script, bundled binaries, auto-prune

- `containr nodes add <user@host>` mints an enroll token, SSHes once,
  runs the install script remotely; --print emits the one-liner
- Public /api/agents/install.sh + /api/agents/download/{platform};
  agent binaries built into the image under /agents
- Agent-side `prune` (bounded docker system prune, volumes opt-in)
  and `system_df` commands
- node_agents.auto_prune + health sweep enqueues daily prune;
  offline/online transitions notify admins
- CLI nodes update/prune/commands + MCP tools (prune confirm-gated)
- Usage page: install one-liner, per-node Prune + auto toggle

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/backend/internal/api/agents.go

@@ -6,6 +6,7 @@ import (
 	"crypto/sha256"
 	"crypto/subtle"
 	"database/sql"
+	_ "embed"
 	"encoding/hex"
 	"encoding/json"
 	"errors"
@@ -13,6 +14,7 @@ import (
 	"math"
 	"net/http"
 	"os"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -36,6 +38,7 @@ type NodeAgent struct {
 	Capabilities  AgentCapabilities      `json:"capabilities"`
 	Resources     NodeResources          `json:"resources"`
 	LastHeartbeat time.Time              `json:"last_heartbeat"`
+	AutoPrune     bool                   `json:"auto_prune"`
 	CreatedAt     time.Time              `json:"created_at"`
 	UpdatedAt     time.Time              `json:"updated_at"`
 	Metadata      map[string]interface{} `json:"metadata"`
@@ -234,6 +237,7 @@ func agentFromRow(row sqlcdb.NodeAgent) NodeAgent {
 		Port:      int(row.Port),
 		Status:    row.Status.String,
 		Version:   row.Version.String,
+		AutoPrune: row.AutoPrune,
 		Metadata:  map[string]interface{}{},
 	}
 	if row.LastHeartbeat.Valid {
@@ -489,6 +493,7 @@ func (h *NodeAgentHandler) UpdateAgent(c *gin.Context) {
 		Resources:     rawJSON(agent.Resources),
 		LastHeartbeat: sql.NullTime{Time: agent.LastHeartbeat, Valid: !agent.LastHeartbeat.IsZero()},
 		Metadata:      rawJSON(agent.Metadata),
+		AutoPrune:     agent.AutoPrune,
 	})
 	if err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update agent"})
@@ -516,6 +521,7 @@ func applyAgentUpdates(agent *NodeAgent, updates map[string]interface{}) {
 	remarshal("capabilities", &agent.Capabilities)
 	remarshal("resources", &agent.Resources)
 	remarshal("metadata", &agent.Metadata)
+	remarshal("auto_prune", &agent.AutoPrune)
 }
 
 // DeleteAgent removes an agent
@@ -803,6 +809,33 @@ func (h *NodeAgentHandler) CreateContainer(c *gin.Context) {
 	c.JSON(http.StatusCreated, gin.H{"container": container})
 }
 
+// PruneAgent enqueues a bounded `docker system prune -af` command. Volumes
+// stay unless the caller explicitly opts in.
+func (h *NodeAgentHandler) PruneAgent(c *gin.Context) {
+	agentID := c.Param("id")
+	if _, err := h.q.GetAgent(c.Request.Context(), agentID); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Agent not found"})
+		return
+	}
+	var req struct {
+		Until   string `json:"until"`   // e.g. "168h" — only prune objects older than this
+		Volumes bool   `json:"volumes"` // destructive — off by default
+	}
+	_ = c.ShouldBindJSON(&req)
+
+	command, err := h.q.CreateCommand(c.Request.Context(), sqlcdb.CreateCommandParams{
+		ID:          uuid.New().String(),
+		Type:        "prune",
+		NodeAgentID: agentID,
+		Payload:     rawJSON(map[string]interface{}{"until": req.Until, "volumes": req.Volumes}),
+	})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to enqueue prune"})
+		return
+	}
+	c.JSON(http.StatusAccepted, gin.H{"command": command})
+}
+
 // ExecuteCommand executes a command on an agent
 func (h *NodeAgentHandler) ExecuteCommand(c *gin.Context) {
 	agentID := c.Param("id")
@@ -1214,9 +1247,45 @@ func (h *NodeAgentHandler) SetupPublicRoutes(router *gin.RouterGroup) {
 		agents.POST("/heartbeat", h.SendHeartbeat)
 		agents.GET("/:id/commands", h.GetPendingCommandsForAgent)
 		agents.POST("/:id/commands/:commandId/result", h.CompleteCommand)
+
+		// Bootstrap surface — the install script and agent binaries are
+		// public; the enroll token is the actual secret.
+		agents.GET("/install.sh", h.ServeInstallScript)
+		agents.GET("/download/:platform", h.ServeAgentBinary)
 	}
 }
 
+//go:embed assets/install-agent.sh
+var agentInstallScript string
+
+// ServeInstallScript returns the agent bootstrap script. The script
+// downloads the binary from this instance first, GH releases second.
+func (h *NodeAgentHandler) ServeInstallScript(c *gin.Context) {
+	c.Data(http.StatusOK, "text/x-sh", []byte(agentInstallScript))
+}
+
+// ServeAgentBinary streams a bundled agent binary. Images ship the
+// linux binaries under CONTAINR_AGENT_BIN_DIR (default /agents).
+func (h *NodeAgentHandler) ServeAgentBinary(c *gin.Context) {
+	platform := c.Param("platform")
+	if platform != "linux-amd64" && platform != "linux-arm64" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "unsupported platform"})
+		return
+	}
+	dir := os.Getenv("CONTAINR_AGENT_BIN_DIR")
+	if dir == "" {
+		dir = "/agents"
+	}
+	path := filepath.Join(dir, "containr-agent-"+platform)
+	info, err := os.Stat(path)
+	if err != nil || info.IsDir() {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no bundled binary for " + platform})
+		return
+	}
+	c.Header("Content-Disposition", `attachment; filename="containr-agent"`)
+	c.File(path)
+}
+
 // SetupAdminRoutes registers dashboard/control agent routes. Command
 // history and container details can leak sensitive output, so these stay
 // admin-only rather than joining the public read group.
@@ -1243,6 +1312,7 @@ func (h *NodeAgentHandler) SetupAdminRoutes(router *gin.RouterGroup) {
 		agents.DELETE("/:id/containers/:containerId", h.ContainerAction)
 
 		agents.GET("/:id/metrics", h.GetAgentMetrics)
+		agents.POST("/:id/prune", h.PruneAgent)
 		agents.POST("/:id/commands", h.ExecuteCommand)
 		agents.GET("/:id/commands", h.GetAgentCommands)
 		agents.GET("/:id/commands/:commandId", h.GetCommandStatus)

app/backend/internal/api/assets/install-agent.sh

@@ -0,0 +1,82 @@
+#!/usr/bin/env bash
+# Containr node agent installer.
+#   curl -fsSL <api>/api/agents/install.sh | bash -s -- --url <api> --token <enroll-token>
+#
+# One-shot: downloads the agent binary from the Containr instance (or GH
+# releases as fallback), writes a systemd unit, starts it. SSH is never
+# needed again — the agent heartbeats and polls commands outbound.
+set -euo pipefail
+
+API_URL=""
+TOKEN=""
+AGENT_NAME=""
+VERSION=""
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --url) API_URL="$2"; shift 2 ;;
+    --token) TOKEN="$2"; shift 2 ;;
+    --name) AGENT_NAME="$2"; shift 2 ;;
+    --version) VERSION="$2"; shift 2 ;;
+    *) echo "unknown flag: $1" >&2; exit 2 ;;
+  esac
+done
+
+[ -n "$API_URL" ] || { echo "--url is required" >&2; exit 2; }
+[ -n "$TOKEN" ] || { echo "--token is required (create one: containr nodes tokens create)" >&2; exit 2; }
+API_URL="${API_URL%/}"
+API_URL="${API_URL%/api/v1}"
+API_URL="${API_URL%/api}"
+
+info() { printf '\033[1;34m==>\033[0m %s\n' "$*"; }
+err()  { printf '\033[1;31mError:\033[0m %s\n' "$*" >&2; }
+
+[ "$(id -u)" = "0" ] || { err "run as root (sudo bash -s -- --url … --token …)"; exit 1; }
+command -v docker >/dev/null 2>&1 || { err "docker not found"; exit 1; }
+command -v curl >/dev/null 2>&1 || { err "curl not found"; exit 1; }
+
+ARCH="$(uname -m)"
+case "$ARCH" in
+  x86_64|amd64) ARCH=amd64 ;;
+  aarch64|arm64) ARCH=arm64 ;;
+  *) err "unsupported architecture: $ARCH"; exit 1 ;;
+esac
+
+BIN=/usr/local/bin/containr-agent
+info "downloading containr-agent (linux/$ARCH)"
+if ! curl -fsSL "$API_URL/api/agents/download/linux-$ARCH" -o "$BIN" 2>/dev/null; then
+  info "instance has no bundled binary — trying GitHub releases"
+  REF="${VERSION:-latest}"
+  if [ "$REF" = "latest" ]; then
+    DL="https://github.com/Dvorinka/Containr/releases/latest/download/containr-agent-linux-$ARCH"
+  else
+    DL="https://github.com/Dvorinka/Containr/releases/download/$REF/containr-agent-linux-$ARCH"
+  fi
+  curl -fsSL "$DL" -o "$BIN" || { err "agent download failed"; exit 1; }
+fi
+chmod +x "$BIN"
+
+UNIT=/etc/systemd/system/containr-agent.service
+info "writing systemd unit"
+cat > "$UNIT" <<UNIT
+[Unit]
+Description=Containr node agent
+After=docker.service network-online.target
+Wants=network-online.target
+Requires=docker.service
+
+[Service]
+Environment=CONTAINR_API_URL=$API_URL
+Environment=CONTAINR_AGENT_AUTH_TOKEN=$TOKEN
+Environment=CONTAINR_AGENT_NAME=${AGENT_NAME:-$(hostname)}
+Restart=always
+RestartSec=5
+ExecStart=$BIN
+
+[Install]
+WantedBy=multi-user.target
+UNIT
+
+systemctl daemon-reload
+systemctl enable --now containr-agent
+info "agent installed and started — it should appear in Containr within ~15s"

app/backend/internal/api/notification_producers.go

@@ -7,6 +7,7 @@ package api
 
 import (
 	"containr/internal/database"
+	"containr/internal/database/sqlcdb"
 	"context"
 	"encoding/json"
 	"fmt"
@@ -61,26 +62,28 @@ func StartAgentHealthSweep(ctx context.Context, db *database.DB) {
 	}()
 }
 
+type agentHealthRow struct {
+	id        string
+	name      string
+	status    string
+	stale     bool
+	autoPrune bool
+}
+
 func reconcileAgentHealth(db *database.DB, staleAfter time.Duration) {
 	cutoff := time.Now().Add(-staleAfter)
-	type agentRow struct {
-		id     string
-		name   string
-		status string
-		stale  bool
-	}
-	var agents []agentRow
+	var agents []agentHealthRow
 	rows, err := db.Query(
 		`SELECT id, COALESCE(name, hostname, id::text), COALESCE(status, ''),
-		        COALESCE(last_heartbeat < $1, TRUE)
+		        COALESCE(last_heartbeat < $1, TRUE), auto_prune
 		 FROM node_agents`, cutoff)
 	if err != nil {
 		log.Printf("containr: agent health sweep: %v", err)
 		return
 	}
 	for rows.Next() {
-		var a agentRow
-		if err := rows.Scan(&a.id, &a.name, &a.status, &a.stale); err == nil {
+		var a agentHealthRow
+		if err := rows.Scan(&a.id, &a.name, &a.status, &a.stale, &a.autoPrune); err == nil {
 			agents = append(agents, a)
 		}
 	}
@@ -104,6 +107,32 @@ func reconcileAgentHealth(db *database.DB, staleAfter time.Duration) {
 				fmt.Sprintf("Agent %s resumed heartbeating.", a.name), "agent", a.id)
 		}
 	}
+
+	scheduleAutoPrune(db, agents)
+}
+
+// scheduleAutoPrune enqueues a `prune` command once per day for agents
+// with auto_prune enabled. Disk pressure is the most common small-VPS
+// failure — this is the dflow setServerAutoCleanup analog.
+func scheduleAutoPrune(db *database.DB, agents []agentHealthRow) {
+	q := sqlcdb.New(db.DB)
+	for _, a := range agents {
+		if !a.autoPrune || a.stale {
+			continue
+		}
+		last, err := q.GetLastAgentCommandByType(context.Background(),
+			sqlcdb.GetLastAgentCommandByTypeParams{NodeAgentID: a.id, Type: "prune"})
+		if err == nil && last.CreatedAt.Valid && time.Since(last.CreatedAt.Time) < 24*time.Hour {
+			continue
+		}
+		if _, err := q.CreateCommand(context.Background(), sqlcdb.CreateCommandParams{
+			ID:          uuid.New().String(),
+			Type:        "prune",
+			NodeAgentID: a.id,
+		}); err != nil {
+			log.Printf("containr: auto-prune enqueue failed for agent %s: %v", a.id, err)
+		}
+	}
 }
 
 // StartUpgradeCheck polls GitHub for the latest release once a day and

app/backend/internal/cli/commands/nodes.go

@@ -81,6 +81,76 @@ var nodesDeleteCmd = &cobra.Command{
 	},
 }
 
+var nodesUpdateCmd = &cobra.Command{
+	Use:   "update <id>",
+	Short: "Update a node agent (--name, --auto-prune)",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c, err := client()
+		if err != nil {
+			return err
+		}
+		body := map[string]interface{}{}
+		if cmd.Flags().Changed("name") {
+			body["name"], _ = cmd.Flags().GetString("name")
+		}
+		if cmd.Flags().Changed("auto-prune") {
+			body["auto_prune"], _ = cmd.Flags().GetBool("auto-prune")
+		}
+		if len(body) == 0 {
+			return &APIError{Message: "nothing to update — pass --name or --auto-prune", ExitCode: ExitError}
+		}
+		data, err := c.Do("PUT", "/agents/"+args[0], body)
+		if err != nil {
+			return err
+		}
+		PrintRaw(data)
+		return nil
+	},
+}
+
+var nodesPruneCmd = &cobra.Command{
+	Use:   "prune <id>",
+	Short: "Enqueue a bounded docker system prune on a node",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c, err := client()
+		if err != nil {
+			return err
+		}
+		volumes, _ := cmd.Flags().GetBool("volumes")
+		if volumes && !Confirm("Prune INCLUDING volumes? This can delete database data.") {
+			return &APIError{Message: "aborted (pass --yes to skip confirmation)", ExitCode: ExitError}
+		}
+		until, _ := cmd.Flags().GetString("until")
+		data, err := c.Do("POST", "/agents/"+args[0]+"/prune",
+			map[string]interface{}{"until": until, "volumes": volumes})
+		if err != nil {
+			return err
+		}
+		PrintRaw(data)
+		return nil
+	},
+}
+
+var nodesCommandsCmd = &cobra.Command{
+	Use:   "commands <id>",
+	Short: "List recent commands sent to a node agent",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c, err := client()
+		if err != nil {
+			return err
+		}
+		data, err := c.Do("GET", "/agents/"+args[0]+"/commands", nil)
+		if err != nil {
+			return err
+		}
+		PrintRaw(data)
+		return nil
+	},
+}
+
 // Agent tokens (cagt_) onboard new nodes.
 var nodeTokensCmd = &cobra.Command{
 	Use:   "tokens",
@@ -145,6 +215,10 @@ var nodeTokensRevokeCmd = &cobra.Command{
 }
 
 func init() {
+	nodesUpdateCmd.Flags().String("name", "", "node display name")
+	nodesUpdateCmd.Flags().Bool("auto-prune", false, "enqueue a daily bounded docker prune")
+	nodesPruneCmd.Flags().String("until", "", "only prune objects older than this duration (e.g. 168h)")
+	nodesPruneCmd.Flags().Bool("volumes", false, "also prune volumes (destructive — asks twice)")
 	nodeTokensCmd.AddCommand(nodeTokensIssueCmd, nodeTokensListCmd, nodeTokensRevokeCmd)
-	NodesCmd.AddCommand(nodesListCmd, nodesGetCmd, nodesDeleteCmd, nodeTokensCmd)
+	NodesCmd.AddCommand(nodesListCmd, nodesGetCmd, nodesUpdateCmd, nodesPruneCmd, nodesCommandsCmd, nodesDeleteCmd, nodeTokensCmd)
 }

app/backend/internal/cli/commands/nodes_add.go

@@ -0,0 +1,214 @@
+package commands
+
+// SSH node bootstrap — one SSH session installs the agent (binary +
+// systemd + enroll token), then SSH is never needed again. SSH keys
+// stay client-side; the server only sees the resulting agent.
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"os"
+	"os/user"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+	"golang.org/x/crypto/ssh"
+	"golang.org/x/crypto/ssh/agent"
+	"golang.org/x/term"
+)
+
+var (
+	nodeSSHKey   string
+	nodeSSHName  string
+	nodeSSHPrint bool
+)
+
+var nodesAddCmd = &cobra.Command{
+	Use:   "add <[user@]host[:port]>",
+	Short: "Bootstrap a node agent over SSH (one session, then closed)",
+	Long: `Installs the containr agent on a remote host:
+
+  1. mints a single-use enroll token via the API
+  2. SSHes in (agent socket, --key, or default key files)
+  3. runs the instance's install script remotely
+  4. closes the session — the agent heartbeats outbound from then on
+
+Use --print to skip SSH and emit the remote one-liner for manual runs.`,
+	Args: cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		c, err := client()
+		if err != nil {
+			return err
+		}
+
+		// Mint the enroll token first — SSH failures then don't leave
+		// partial state on the remote.
+		body := map[string]interface{}{"label": "bootstrap"}
+		if nodeSSHName != "" {
+			body["label"] = "bootstrap:" + nodeSSHName
+		}
+		tokenData, err := c.Do("POST", "/agent-tokens", body)
+		if err != nil {
+			return err
+		}
+		tokenObj, err := unwrapObject(tokenData, "token")
+		if err != nil {
+			return err
+		}
+		token := str(tokenObj, "token")
+		if token == "" {
+			return &APIError{Message: "enroll token missing from response", ExitCode: ExitError}
+		}
+
+		// Agent bootstrap endpoints live at /api/agents (no /v1) — strip
+		// the API version suffix off the client base.
+		apiRoot := strings.TrimSuffix(c.BaseURL, "/api/v1")
+		installCmd := fmt.Sprintf(
+			`curl -fsSL %q | bash -s -- --url %q --token %q --name %q`,
+			apiRoot+"/api/agents/install.sh", apiRoot, token, firstNonEmptyStr(nodeSSHName, nodeSSHTarget(args[0]).host),
+		)
+
+		if nodeSSHPrint {
+			fmt.Println(installCmd)
+			return nil
+		}
+
+		target := nodeSSHTarget(args[0])
+		if err := sshBootstrap(target, installCmd); err != nil {
+			return err
+		}
+		fmt.Printf("agent installing on %s — it should appear in `containr nodes list` within ~15s\n", target.host)
+		return nil
+	},
+}
+
+type sshTarget struct {
+	user string
+	host string
+	port string
+}
+
+func nodeSSHTarget(raw string) sshTarget {
+	t := sshTarget{port: "22"}
+	rest := raw
+	if at := strings.LastIndex(rest, "@"); at >= 0 {
+		t.user = rest[:at]
+		rest = rest[at+1:]
+	}
+	if colon := strings.LastIndex(rest, ":"); colon >= 0 && !strings.Contains(rest, "]") {
+		t.host, t.port = rest[:colon], rest[colon+1:]
+	} else {
+		t.host = rest
+	}
+	if t.user == "" {
+		if u, err := user.Current(); err == nil {
+			t.user = u.Username
+		}
+	}
+	return t
+}
+
+func sshAuthMethods(keyPath string) []ssh.AuthMethod {
+	var methods []ssh.AuthMethod
+
+	// ssh-agent first — matches how people actually manage keys.
+	if sock := os.Getenv("SSH_AUTH_SOCK"); sock != "" {
+		if conn, err := net.Dial("unix", sock); err == nil {
+			defer conn.Close()
+			methods = append(methods, ssh.PublicKeysCallback(agent.NewClient(conn).Signers))
+		}
+	}
+
+	var keyFiles []string
+	if keyPath != "" {
+		keyFiles = []string{keyPath}
+	} else if home, err := os.UserHomeDir(); err == nil {
+		for _, name := range []string{"id_ed25519", "id_rsa", "id_ecdsa"} {
+			p := filepath.Join(home, ".ssh", name)
+			if _, err := os.Stat(p); err == nil {
+				keyFiles = append(keyFiles, p)
+			}
+		}
+	}
+	for _, p := range keyFiles {
+		if signer, err := sshPrivateKey(p); err == nil {
+			methods = append(methods, ssh.PublicKeys(signer))
+		}
+	}
+	return methods
+}
+
+func sshPrivateKey(path string) (ssh.Signer, error) {
+	pem, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	signer, err := ssh.ParsePrivateKey(pem)
+	if err != nil {
+		var missing *ssh.PassphraseMissingError
+		if errors.As(err, &missing) {
+			fmt.Fprintf(os.Stderr, "passphrase for %s: ", path)
+			pass, readErr := term.ReadPassword(int(os.Stdin.Fd()))
+			fmt.Fprintln(os.Stderr)
+			if readErr != nil {
+				return nil, readErr
+			}
+			return ssh.ParsePrivateKeyWithPassphrase(pem, pass)
+		}
+		return nil, err
+	}
+	return signer, nil
+}
+
+func sshBootstrap(t sshTarget, remoteCmd string) error {
+	config := &ssh.ClientConfig{
+		User:            t.user,
+		Auth:            sshAuthMethods(nodeSSHKey),
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(), // jarvis: TOFU would be better; ssh_known_hosts parsing is the upgrade path
+		Timeout:         15 * time.Second,
+	}
+	if len(config.Auth) == 0 {
+		return &APIError{Message: "no SSH auth methods (ssh-agent empty, no usable keys)", ExitCode: ExitError}
+	}
+
+	conn, err := ssh.Dial("tcp", net.JoinHostPort(t.host, t.port), config)
+	if err != nil {
+		return &APIError{Message: fmt.Sprintf("ssh connect: %v", err), ExitCode: ExitError}
+	}
+	defer conn.Close()
+
+	session, err := conn.NewSession()
+	if err != nil {
+		return err
+	}
+	defer session.Close()
+	session.Stdout = os.Stdout
+	session.Stderr = os.Stderr
+
+	// Root shells run directly; otherwise escalate via sudo. NOPASSWD
+	// sudo is assumed — a password prompt here means the operator should
+	// use --print and run the command themselves.
+	if t.user == "root" {
+		return session.Run(remoteCmd)
+	}
+	return session.Run("sudo -n " + remoteCmd)
+}
+
+func firstNonEmptyStr(values ...string) string {
+	for _, v := range values {
+		if v != "" {
+			return v
+		}
+	}
+	return ""
+}
+
+func init() {
+	nodesAddCmd.Flags().StringVar(&nodeSSHKey, "key", "", "SSH private key path (defaults: agent, ~/.ssh/id_*)")
+	nodesAddCmd.Flags().StringVar(&nodeSSHName, "name", "", "node display name (defaults to remote hostname)")
+	nodesAddCmd.Flags().BoolVar(&nodeSSHPrint, "print", false, "print the remote install command instead of running SSH")
+	NodesCmd.AddCommand(nodesAddCmd)
+}

app/backend/internal/database/sqlcdb/agents.sql.go

@@ -63,7 +63,7 @@ INSERT INTO node_agents (
     id, name, hostname, ip_address, port, status, version,
     capabilities, resources, last_heartbeat, metadata
 ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11)
-RETURNING id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata
+RETURNING id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata, auto_prune
 `
 
 type CreateAgentParams struct {
@@ -109,6 +109,7 @@ func (q *Queries) CreateAgent(ctx context.Context, arg CreateAgentParams) (NodeA
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.Metadata,
+		&i.AutoPrune,
 	)
 	return i, err
 }
@@ -229,7 +230,7 @@ func (q *Queries) DeleteAgent(ctx context.Context, id string) error {
 }
 
 const getAgent = `-- name: GetAgent :one
-SELECT id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata FROM node_agents WHERE id = $1
+SELECT id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata, auto_prune FROM node_agents WHERE id = $1
 `
 
 func (q *Queries) GetAgent(ctx context.Context, id string) (NodeAgent, error) {
@@ -249,12 +250,13 @@ func (q *Queries) GetAgent(ctx context.Context, id string) (NodeAgent, error) {
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.Metadata,
+		&i.AutoPrune,
 	)
 	return i, err
 }
 
 const getAgentByHostAndIP = `-- name: GetAgentByHostAndIP :one
-SELECT id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata FROM node_agents
+SELECT id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata, auto_prune FROM node_agents
 WHERE hostname = $1 AND ip_address = $2
 LIMIT 1
 `
@@ -281,6 +283,7 @@ func (q *Queries) GetAgentByHostAndIP(ctx context.Context, arg GetAgentByHostAnd
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.Metadata,
+		&i.AutoPrune,
 	)
 	return i, err
 }
@@ -378,6 +381,36 @@ func (q *Queries) GetContainerForAgent(ctx context.Context, arg GetContainerForA
 	return i, err
 }
 
+const getLastAgentCommandByType = `-- name: GetLastAgentCommandByType :one
+SELECT id, type, node_agent_id, container_id, payload, status, result, error, created_at, updated_at, completed_at FROM agent_commands
+WHERE node_agent_id = $1 AND type = $2
+ORDER BY created_at DESC LIMIT 1
+`
+
+type GetLastAgentCommandByTypeParams struct {
+	NodeAgentID string `json:"node_agent_id"`
+	Type        string `json:"type"`
+}
+
+func (q *Queries) GetLastAgentCommandByType(ctx context.Context, arg GetLastAgentCommandByTypeParams) (AgentCommand, error) {
+	row := q.db.QueryRowContext(ctx, getLastAgentCommandByType, arg.NodeAgentID, arg.Type)
+	var i AgentCommand
+	err := row.Scan(
+		&i.ID,
+		&i.Type,
+		&i.NodeAgentID,
+		&i.ContainerID,
+		&i.Payload,
+		&i.Status,
+		&i.Result,
+		&i.Error,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.CompletedAt,
+	)
+	return i, err
+}
+
 const insertAgentHeartbeat = `-- name: InsertAgentHeartbeat :exec
 INSERT INTO agent_heartbeats (
     id, node_agent_id, timestamp, status, resources,
@@ -458,7 +491,7 @@ func (q *Queries) ListAgentHeartbeatsSince(ctx context.Context, arg ListAgentHea
 }
 
 const listAgents = `-- name: ListAgents :many
-SELECT id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata FROM node_agents ORDER BY created_at ASC
+SELECT id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata, auto_prune FROM node_agents ORDER BY created_at ASC
 `
 
 func (q *Queries) ListAgents(ctx context.Context) ([]NodeAgent, error) {
@@ -484,6 +517,7 @@ func (q *Queries) ListAgents(ctx context.Context) ([]NodeAgent, error) {
 			&i.CreatedAt,
 			&i.UpdatedAt,
 			&i.Metadata,
+			&i.AutoPrune,
 		); err != nil {
 			return nil, err
 		}
@@ -639,9 +673,10 @@ UPDATE node_agents SET
     resources = $9,
     last_heartbeat = $10,
     metadata = $11,
+    auto_prune = $12,
     updated_at = NOW()
 WHERE id = $1
-RETURNING id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata
+RETURNING id, name, hostname, ip_address, port, status, version, capabilities, resources, last_heartbeat, created_at, updated_at, metadata, auto_prune
 `
 
 type UpdateAgentParams struct {
@@ -656,6 +691,7 @@ type UpdateAgentParams struct {
 	Resources     pqtype.NullRawMessage `json:"resources"`
 	LastHeartbeat sql.NullTime          `json:"last_heartbeat"`
 	Metadata      pqtype.NullRawMessage `json:"metadata"`
+	AutoPrune     bool                  `json:"auto_prune"`
 }
 
 func (q *Queries) UpdateAgent(ctx context.Context, arg UpdateAgentParams) (NodeAgent, error) {
@@ -671,6 +707,7 @@ func (q *Queries) UpdateAgent(ctx context.Context, arg UpdateAgentParams) (NodeA
 		arg.Resources,
 		arg.LastHeartbeat,
 		arg.Metadata,
+		arg.AutoPrune,
 	)
 	var i NodeAgent
 	err := row.Scan(
@@ -687,6 +724,7 @@ func (q *Queries) UpdateAgent(ctx context.Context, arg UpdateAgentParams) (NodeA
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.Metadata,
+		&i.AutoPrune,
 	)
 	return i, err
 }

app/backend/internal/database/sqlcdb/models.go

@@ -175,6 +175,7 @@ type NodeAgent struct {
 	CreatedAt     sql.NullTime          `json:"created_at"`
 	UpdatedAt     sql.NullTime          `json:"updated_at"`
 	Metadata      pqtype.NullRawMessage `json:"metadata"`
+	AutoPrune     bool                  `json:"auto_prune"`
 }
 
 type Notification struct {

app/backend/internal/database/sqlcdb/querier.go

@@ -58,6 +58,7 @@ type Querier interface {
 	GetDatabaseServiceByID(ctx context.Context, id string) (DatabaseService, error)
 	GetDatabaseServiceByIDAndUser(ctx context.Context, arg GetDatabaseServiceByIDAndUserParams) (DatabaseService, error)
 	GetDatabaseServiceOwnerID(ctx context.Context, id string) (string, error)
+	GetLastAgentCommandByType(ctx context.Context, arg GetLastAgentCommandByTypeParams) (AgentCommand, error)
 	GetOutboundWebhookByID(ctx context.Context, id uuid.UUID) (OutboundWebhook, error)
 	GetOutboundWebhookByIDAndUser(ctx context.Context, arg GetOutboundWebhookByIDAndUserParams) (OutboundWebhook, error)
 	GetProjectByIDForUser(ctx context.Context, arg GetProjectByIDForUserParams) (Project, error)

app/backend/internal/mcpserver/server.go

@@ -173,6 +173,9 @@ func init() {
 	register(spec{"containr_nodes_get", "Get a node agent (admin)", "GET", "/agents/{id}", []string{"id"}, nil, false})
 	register(spec{"containr_agent_tokens_issue", "Issue an agent onboarding token (admin). Args: label.", "POST", "/agent-tokens", nil, []string{"label"}, false})
 	register(spec{"containr_agent_tokens_list", "List agent onboarding tokens (admin)", "GET", "/agent-tokens", nil, nil, false})
+	register(spec{"containr_nodes_update", "Update a node agent (admin). Args: id; optional auto_prune, name.", "PUT", "/agents/{id}", []string{"id"}, []string{"auto_prune", "name"}, false})
+	register(spec{"containr_nodes_prune", "Enqueue a bounded docker system prune on a node (admin). Args: id; optional until (e.g. 168h), volumes (danger, off by default).", "POST", "/agents/{id}/prune", []string{"id"}, []string{"until", "volumes"}, true})
+	register(spec{"containr_nodes_commands", "List recent commands sent to a node agent (admin). Args: id.", "GET", "/agents/{id}/commands", []string{"id"}, nil, false})
 
 	// Scaling / HA / security
 	register(spec{"containr_scaling_status", "Autoscaler status", "GET", "/scaling/status", nil, nil, false})