feat(tui): add /tools command for listing available tools

internal/agent/loop.go

@@ -698,6 +698,11 @@ func (a *Agent) SetModel(model string) {
 // Model returns the current model codename.
 func (a *Agent) Model() string { return a.cfg.Model }
 
+// ToolList returns the registered tools in registration order.
+func (a *Agent) ToolList() []tools.ToolInfo {
+	return a.tools.ToolList()
+}
+
 // Provider returns the active backend kind (e.g. "xshellz", "ollama").
 func (a *Agent) Provider() string {
 	if a.cfg.Provider == "" {

internal/tools/tools.go

@@ -30,6 +30,13 @@ type FunctionDef struct {
 	Parameters  json.RawMessage `json:"parameters"`
 }
 
+// ToolInfo contains human-readable information about a registered tool.
+type ToolInfo struct {
+	Name        string
+	Description string
+	Mutating    bool
+}
+
 // Registry holds the tools available to the agent, preserving order.
 type Registry struct {
 	tools map[string]Tool
@@ -73,6 +80,23 @@ func (r *Registry) Definitions() []Definition {
 	return defs
 }
 
+// ToolList returns the registered tools in registration order.
+func (r *Registry) ToolList() []ToolInfo {
+	out := make([]ToolInfo, 0, len(r.order))
+
+	for _, name := range r.order {
+		t := r.tools[name]
+
+		out = append(out, ToolInfo{
+			Name:        t.Name(),
+			Description: t.Description(),
+			Mutating:    t.Mutating(),
+		})
+	}
+
+	return out
+}
+
 // DefaultRegistry returns the standard coding-agent toolset.
 func DefaultRegistry() *Registry {
 	bg := newBGManager() // shared by bash / bash_output / kill_shell

internal/tui/model.go

@@ -1303,6 +1303,7 @@ var slashCmds = []slashCmd{
 	{"/clear", "reset the conversation"},
 	{"/purge", "delete ALL saved sessions"},
 	{"/update", "update to the latest release"},
+	{"/tools", "list all available tools"},
 	{"/help", "show detailed help"},
 	{"/exit", "quit (the session is saved)"},
 }
@@ -2044,6 +2045,25 @@ func (m model) command(input string) (tea.Model, tea.Cmd) {
 		return m.attachSession(fields)
 	case "/help":
 		return m, tea.Printf("%s", renderHelp(m.md, m.width))
+	case "/tools":
+		var b strings.Builder
+
+		b.WriteString("### Available Tools\n\n")
+
+		for _, t := range m.agent.ToolList() {
+			mode := "Read-only"
+			if t.Mutating {
+				mode = "Permission-gated"
+			}
+
+			fmt.Fprintf(&b, "- **%s** (%s) — %s\n",
+				t.Name,
+				mode,
+				t.Description,
+			)
+		}
+
+		return m, tea.Printf("%s", renderTools(m.md, m.width, b.String()))
 	case "/learn":
 		// Run the project-learn task as a turn (writing BORG.md prompts for
 		// permission like any edit). Same harness config as `borg learn`.
@@ -2604,6 +2624,17 @@ func renderHelp(md *mdRenderer, width int) string {
 	return out
 }
 
+func renderTools(md *mdRenderer, width int, text string) string {
+	if md != nil {
+		return strings.TrimRight(md.render(text, width), "\n")
+	}
+	out, err := glamour.Render(text, "dark")
+	if err != nil {
+		return text
+	}
+	return out
+}
+
 // privacyURL is borg's canonical privacy policy.
 const privacyURL = "https://www.xshellz.com/privacy-policy"
 

internal/tui/repl_test.go

@@ -163,11 +163,14 @@ func TestCommandHelpExitUnknownPurge(t *testing.T) {
 	_, cmd := slash(m, "/help")
 	require.NotNil(t, cmd)
 
+	_, cmd = slash(m, "/tools")
+	require.NotNil(t, cmd)
+
 	mq, _ := slash(m, "/exit")
 	require.True(t, mq.quitting)
 
 	_, cmd = slash(m, "/bogus")
-	require.NotNil(t, cmd) // prints an "unknown command" line
+	require.NotNil(t, cmd)
 
 	mp, _ := slash(m, "/purge")
 	require.Equal(t, modeConfirmPurge, mp.mode)