add pi tool to silo

Author: leighmcculloch

README.md

@@ -11,7 +11,7 @@ Run AI coding assistants in containers/vms.
 ╚══════╝╚═╝╚══════╝ ╚═════╝
 ```
 
-Silo lets you run AI tools like Claude Code, Cline, Codex, OpenCode, Paperclip AI, GitHub Copilot CLI, Mistral Vibe, and Kilo Code in isolated Docker containers, Apple containers (lightweight VMs), Fly.io machines (remote VMs), or [Namespace devboxes](https://namespace.so/devbox) (remote VMs). The coding tools are configured to run in auto-approve mode.
+Silo lets you run AI tools like Claude Code, Cline, Codex, OpenCode, Paperclip AI, GitHub Copilot CLI, Mistral Vibe, Kilo Code, and Pi Coding Agent in isolated Docker containers, Apple containers (lightweight VMs), Fly.io machines (remote VMs), or [Namespace devboxes](https://namespace.so/devbox) (remote VMs). The coding tools are configured to run in auto-approve mode.
 
 > [!WARNING]
 > Built using AI. No isolation is perfect. Use at your own risk.
@@ -57,6 +57,7 @@ Silo resolves this by running AI tools in isolated containers/vms with:
 | GitHub Copilot CLI | `silo copilot` | GitHub's Copilot CLI |
 | Mistral Vibe | `silo vibe` | Mistral's CLI coding assistant |
 | Kilo Code CLI | `silo kilo` | Kilo's terminal coding agent |
+| Pi Coding Agent | `silo pi` | Pi's coding assistant |
 
 ## Installation
 
@@ -104,6 +105,7 @@ silo paperclipai
 silo copilot
 silo vibe
 silo kilo
+silo pi
 
 # Pass arguments to the tool (after --)
 silo claude -- --help

dockerfile_test.go

@@ -54,6 +54,7 @@ func TestAvailableTools(t *testing.T) {
 		"copilot":     true,
 		"vibe":        true,
 		"kilo":        true,
+		"pi":          true,
 	}
 
 	for _, tool := range tools {
@@ -81,6 +82,7 @@ func TestToolDescription(t *testing.T) {
 		{"copilot", "Copilot"},
 		{"vibe", "Vibe"},
 		{"kilo", "Kilo"},
+		{"pi", "Pi"},
 		{"unknown", "Unknown"},
 	}
 

main.go

@@ -35,6 +35,7 @@ import (
 	"github.com/leighmcculloch/silo/tools/mistralvibe"
 	"github.com/leighmcculloch/silo/tools/opencode"
 	"github.com/leighmcculloch/silo/tools/paperclipai"
+	"github.com/leighmcculloch/silo/tools/pi"
 	"github.com/spf13/cobra"
 )
 
@@ -53,6 +54,7 @@ var (
 		copilotcli.Tool,
 		mistralvibe.Tool,
 		kilocode.Tool,
+		pi.Tool,
 	}
 )
 
@@ -145,7 +147,7 @@ func newRootCmd(stdout, stderr io.Writer) *cobra.Command {
   ███████║██║███████╗╚██████╔╝
   ╚══════╝╚═╝╚══════╝ ╚═════╝
 `) + `
-Run AI tools (Claude Code, Cline, Codex, OpenCode, Paperclip AI, Copilot, Mistral Vibe, Kilo Code) in isolated
+Run AI tools (Claude Code, Cline, Codex, OpenCode, Paperclip AI, Copilot, Mistral Vibe, Kilo Code, Pi Coding Agent) in isolated
 Docker containers with proper security sandboxing.
 
 The container is configured with:
@@ -170,6 +172,7 @@ Configuration is loaded from (in order, merged):
   silo copilot
   silo vibe
   silo kilo
+  silo pi
 
   # Pass arguments to the tool
   silo claude -- --help`,

tools/pi/Dockerfile

@@ -0,0 +1,13 @@
+# ============================================
+# Pi Coding Agent stage
+# ============================================
+FROM base AS pi
+
+ARG HOME
+ARG TOOL_VERSION
+
+RUN set -e && \
+	npm install -g @mariozechner/pi-coding-agent${TOOL_VERSION:+"@$TOOL_VERSION"} && \
+	pi --version
+
+# SILO_POST_BUILD_HOOKS_PI

tools/pi/pi.go

@@ -0,0 +1,62 @@
+package pi
+
+import (
+	"context"
+	_ "embed"
+	"encoding/json"
+	"io"
+	"net/http"
+
+	"github.com/leighmcculloch/silo/config"
+	"github.com/leighmcculloch/silo/tools"
+)
+
+//go:embed Dockerfile
+var dockerfileStage string
+
+// Tool is the Pi Coding Agent tool definition.
+var Tool = tools.Tool{
+	Name:            "pi",
+	Description:     "Pi Coding Agent - AI coding assistant",
+	DockerfileStage: dockerfileStage,
+	Command: func(home string) []string {
+		return []string{home + "/.local/node/bin/pi"}
+	},
+	DefaultConfig: func() config.ToolConfig {
+		return config.ToolConfig{
+			MountsRW: []string{"~/.pi"},
+		}
+	},
+	LatestVersion: fetchLatestVersion,
+}
+
+// fetchLatestVersion queries the npm registry for the latest pi version.
+func fetchLatestVersion(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, "https://registry.npmjs.org/@mariozechner/pi-coding-agent/latest", nil)
+	if err != nil {
+		return ""
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return ""
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return ""
+	}
+
+	var pkg struct {
+		Version string `json:"version"`
+	}
+	if err := json.Unmarshal(body, &pkg); err != nil {
+		return ""
+	}
+	return pkg.Version
+}