{"repo": "ardumine/hagent", "files": {"Agent/AgentImplement.cs": {"69318a38b4ea4feee28f5edd009b14f03c072610": {"t": 1785745802.3753653, "n": 15186, "h": "4bdc207642d17c49", "c": "using System.Text.Json;\nusing System.Text.Json.Nodes;\nusing HCore.Modules.Base;\n\nnamespace HCore.Packages.Agent;\n\n/// <summary>\n/// An interactive agent app. Launched from the shell as <c>agent</c> (optionally\n/// with an initial prompt), it takes over the terminal and runs a chat REPL:\n/// you type, it thinks and uses tools (VFS + shell), it answers, and the\n/// conversation history persists across turns so you can reply to its questions.\n/// Type <c>/exit</c> to quit and return to the shell.\n/// </summary>\npublic class AgentImplement : BaseImplement, IAgent, IOneshotCommand\n{\n    private const string ApiKeyPath = \"/etc/agent/apikey\";\n    private const string ConfigPath = \"/etc/agent/config.json\";\n    private const int MaxSteps = 12;\n\n    private string[] _args = [];\n\n    public void SetArguments(string[] args) => _args = args;\n\n    public void Run()\n    {\n        string apiKey;\n        try\n        {\n            apiKey = LoadApiKey();\n        }\n        catch (Exception ex)\n        {\n            Console.WriteLine($\"agent: {ex.Message}\");\n            return;\n        }\n\n        var (model, baseUrl) = LoadConfig();\n        var client = new DeepseekClient(apiKey, model, baseUrl);\n        var tools = new AgentTools(Vfs, Host, ShellPath());\n        var store = new SessionStore(Vfs);\n\n        // Parse launch args: `agent [-s|--session <name>] [initial prompt...]`.\n        var (sessionArg, promptArg) = ParseLaunchArgs(_args);\n\n        var messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n        string sessionName;\n        if (sessionArg is not null && store.Exists(sessionArg))\n        {\n            sessionName = SessionStore.Sanitize(sessionArg);\n            var restored = store.Load(sessionName);\n            if (restored is not null)\n            {\n                foreach (var m in restored) messages.Add(m?.DeepClone());\n                Console.WriteLine($\"(restored session '{sessionName}' — {restored.Count} messages)\");\n            }\n        }\n        else\n        {\n            sessionName = sessionArg is not null ? SessionStore.Sanitize(sessionArg) : SessionStore.NewName();\n        }\n\n        Console.WriteLine($\"HCore Agent ({model}). Session: {sessionName}. Type your message.\");\n        Console.WriteLine(\"Commands: /exit, /reset, /model <name>, /sessions, /save [name], /load <name>, /new [name], /help.\");\n        Logger.I($\"agent: interactive session started, model={model}, session={sessionName}\");\n\n        // Optional initial prompt passed on the command line: `agent do something`.\n        var pending = string.IsNullOrWhiteSpace(promptArg) ? null : promptArg;\n\n        while (true)\n        {\n            // Honor our own kill signal: if this instance was reaped (e.g. someone\n            // ran `kill` on us), the kernel cancelled StopToken — end the session\n            // instead of lingering as a zombie on the shell's thread.\n            if (StopToken.IsCancellationRequested)\n            {\n                Console.WriteLine(\"agent: this instance was killed — ending session.\");\n                break;\n            }\n\n            string? line;\n            if (!string.IsNullOrEmpty(pending))\n            {\n                line = pending;\n                pending = null;\n                Console.WriteLine($\"you> {line}\");\n            }\n            else\n            {\n                Console.Write(\"you> \");\n                line = Console.ReadLine();\n            }\n\n            if (line is null) break;                 // EOF / Ctrl-D\n            line = line.Trim();\n            if (line.Length == 0) continue;\n\n            if (line is \"/exit\" or \"/quit\") break;\n            if (line == \"/help\")\n            {\n                Console.WriteLine(\n                    \"Commands: /exit quit · /reset clear conversation · /model <name> switch model ·\\n\" +\n                    \"          /sessions list saved · /save [name] save now · /load <name> restore ·\\n\" +\n                    \"          /new [name] start fresh session · /help this help.\");\n                continue;\n            }\n            if (line == \"/reset\")\n            {\n                messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n                Console.WriteLine(\"(conversation reset)\");\n                continue;\n            }\n            if (line == \"/sessions\")\n            {\n                var names = store.List();\n                if (names.Count == 0) Console.WriteLine(\"(no saved sessions)\");\n                else foreach (var n in names)\n                    Console.WriteLine($\"  {(n == sessionName ? \"*\" : \" \")} {n} ({store.Count(n)} messages)\");\n                continue;\n            }\n            if (line == \"/save\" || line.StartsWith(\"/save \"))\n            {\n                var given = line.Length > 5 ? line[5..].Trim() : \"\";\n                if (given.Length > 0) sessionName = SessionStore.Sanitize(given);\n                store.Save(sessionName, model, messages);\n                Console.WriteLine($\"(saved session '{sessionName}')\");\n                continue;\n            }\n            if (line == \"/load\" || line.StartsWith(\"/load \"))\n            {\n                var given = line.Length > 5 ? line[5..].Trim() : \"\";\n                if (given.Length == 0) { Console.WriteLine(\"usage: /load <name>\"); continue; }\n                var restored = store.Load(given);\n                if (restored is null) { Console.WriteLine($\"(no session '{given}')\"); continue; }\n                sessionName = SessionStore.Sanitize(given);\n                messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n                foreach (var m in restored) messages.Add(m?.DeepClone());\n                Console.WriteLine($\"(loaded session '{sessionName}' — {restored.Count} messages)\");\n                continue;\n            }\n            if (line == \"/new\" || line.StartsWith(\"/new \"))\n            {\n                var given = line.Length > 4 ? line[4..].Trim() : \"\";\n                sessionName = given.Length > 0 ? SessionStore.Sanitize(given) : SessionStore.NewName();\n                messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n                Console.WriteLine($\"(new session '{sessionName}')\");\n                continue;\n            }\n            if (line == \"/model\" || line.StartsWith(\"/model \"))\n            {\n                var requested = line.Length > 6 ? line[6..].Trim() : \"\";\n                if (requested.Length == 0) { Console.WriteLine($\"model: {model}\"); continue; }\n                model = requested;\n                SaveModel(model, baseUrl);\n                client = new DeepseekClient(apiKey, model, baseUrl);\n                Console.WriteLine($\"(model set to {model})\");\n                continue;\n            }\n\n            // Hot-reload config each turn so edits to /etc/agent/config.json\n            // (by you, or by the agent itself via a tool) take effect live.\n            var (curModel, curBase) = LoadConfig();\n            if (curModel != model || curBase != baseUrl)\n            {\n                model = curModel;\n                baseUrl = curBase;\n                client = new DeepseekClient(apiKey, model, baseUrl);\n                Console.WriteLine($\"(config reloaded: model={model})\");\n            }\n\n            messages.Add(Msg(\"user\", line));\n            if (!RunTurn(client, tools, messages))\n                break; // fatal API error already reported\n\n            // Auto-persist the conversation so it survives crashes / kills.\n            try { store.Save(sessionName, model, messages); }\n            catch (Exception ex) { Logger.W($\"agent: session save failed: {ex.Message}\"); }\n        }\n\n        Console.WriteLine($\"agent: session '{sessionName}' ended.\");\n        Logger.I($\"agent: interactive session '{sessionName}' ended.\");\n    }\n\n    /// <summary>\n    /// Drive one user turn: call the model, execute any tool calls, loop until it\n    /// produces a plain-text answer (or the step budget runs out). Returns false\n    /// only on a fatal API error (caller should stop the session).\n    /// </summary>\n    private bool RunTurn(DeepseekClient client, AgentTools tools, JsonArray messages)\n    {\n        for (var step = 0; step < MaxSteps; step++)\n        {\n            JsonNode message;\n            try\n            {\n                message = client.Chat(messages, AgentTools.Schema);\n            }\n            catch (Exception ex)\n            {\n                Console.WriteLine($\"agent: request failed: {ex.Message}\");\n                Logger.E($\"agent request failed: {ex.Message}\");\n                return false;\n            }\n\n            messages.Add(message.DeepClone());\n\n            var toolCalls = message[\"tool_calls\"] as JsonArray;\n            if (toolCalls is { Count: > 0 })\n            {\n                foreach (var call in toolCalls)\n                {\n                    if (call is null) continue;\n                    var id = call[\"id\"]?.GetValue<string>() ?? \"\";\n                    var fn = call[\"function\"];\n                    var name = fn?[\"name\"]?.GetValue<string>() ?? \"\";\n                    var argsRaw = fn?[\"arguments\"]?.GetValue<string>() ?? \"{}\";\n\n                    var args = ParseArgs(argsRaw);\n                    Console.WriteLine($\"  [tool] {name}({Compact(argsRaw)})\");\n                    var result = tools.Invoke(name, args);\n                    Logger.I($\"agent tool {name} -> {result.Length} chars\");\n\n                    messages.Add(new JsonObject\n                    {\n                        [\"role\"] = \"tool\",\n                        [\"tool_call_id\"] = id,\n                        [\"content\"] = result,\n                    });\n                }\n                continue;\n            }\n\n            var content = message[\"content\"]?.GetValue<string>() ?? \"\";\n            Console.WriteLine($\"agent> {content.Trim()}\");\n            return true;\n        }\n\n        Console.WriteLine($\"agent: stopped after {MaxSteps} steps without a final answer.\");\n        return true;\n    }\n\n    private string ShellPath()\n    {\n        var name = InstanceName;\n        var slash = name.LastIndexOf('/');\n        return slash > 0 ? name[..slash] : \"init/console\";\n    }\n\n    private string LoadApiKey()\n    {\n        if (Vfs.Exists(ApiKeyPath))\n        {\n            var key = Vfs.ReadAllText(ApiKeyPath).Trim();\n            if (key.Length > 0) return key;\n        }\n\n        var env = Environment.GetEnvironmentVariable(\"DEEPSEEK_API_KEY\");\n        if (!string.IsNullOrWhiteSpace(env)) return env.Trim();\n\n        throw new InvalidOperationException(\n            $\"no API key. Put it in {ApiKeyPath} or set DEEPSEEK_API_KEY.\");\n    }\n\n    private (string model, string baseUrl) LoadConfig()\n    {\n        var model = \"deepseek-chat\";\n        var baseUrl = \"https://api.deepseek.com\";\n        try\n        {\n            if (Vfs.Exists(ConfigPath))\n            {\n                var doc = JsonNode.Parse(Vfs.ReadAllText(ConfigPath));\n                model = doc?[\"model\"]?.GetValue<string>() ?? model;\n                baseUrl = doc?[\"baseUrl\"]?.GetValue<string>() ?? baseUrl;\n            }\n        }\n        catch { /* fall back to defaults */ }\n        return (model, baseUrl);\n    }\n\n    private void SaveModel(string model, string baseUrl)\n    {\n        try\n        {\n            var cfg = new JsonObject { [\"model\"] = model, [\"baseUrl\"] = baseUrl };\n            Vfs.WriteAllText(ConfigPath, cfg.ToJsonString());\n        }\n        catch (Exception ex)\n        {\n            Console.WriteLine($\"(warning: could not persist config: {ex.Message})\");\n        }\n    }\n\n    private string SystemPrompt()\n    {\n        return\n            \"You are an autonomous agent running inside HCore, a microkernel with a \" +\n            \"virtual filesystem (VFS). You help the user by reasoning and using tools.\\n\" +\n            \"\\n\" +\n            \"Environment:\\n\" +\n            $\"- Your instance name: {InstanceName}\\n\" +\n            $\"- Current working directory: {Vfs.WorkingDirectory}\\n\" +\n            \"- The VFS layout: /packs (installed packages), /proc (running module \" +\n            \"instances, read-only), /etc (config + services), /home, /data.\\n\" +\n            \"\\n\" +\n            \"Tools: vfs_list(path), vfs_read(path), vfs_write(path, content, append?), \" +\n            \"shell(command), pkg_build(name, source). Use vfs_* for direct file access; use \" +\n            \"shell to run HShell command lines and interact with modules (ls, cat, spawn, run, \" +\n            \"kill, service, hpm, ...). Use pkg_build to CREATE, COMPILE and HOT-LOAD a brand-new \" +\n            \"HCore package from C# source on the fly, then 'spawn'/'run' it via shell — a full \" +\n            \"write→compile→(read errors)→fix→run→debug loop, all without a reboot. \" +\n            \"All paths are VFS paths. Use tools to inspect or act on the system \" +\n            \"before answering. When you have the answer, reply in plain text with no tool \" +\n            \"call. Be concise.\\n\" +\n            \"\\n\" +\n            \"This is an ongoing, multi-turn conversation with the user at a terminal. \" +\n            \"If a request is ambiguous or you need more information, ask the user a \" +\n            \"clarifying question in plain text (no tool call) and wait for their reply.\\n\" +\n            \"\\n\" +\n            \"About yourself: you run as a one-shot interactive command spawned by the \" +\n            \"shell (instance under init/console), NOT as a registered service. So \" +\n            $\"'service stop {InstanceName}' or 'service start agent' will NOT affect this \" +\n            \"session — there is no 'agent' service. Your model/endpoint come from \" +\n            \"/etc/agent/config.json and are hot-reloaded every turn: if you (or the user) \" +\n            \"change 'model' there, it takes effect on the next message automatically — no \" +\n            \"restart needed. The user can also switch models with the /model command.\";\n    }\n\n    private static JsonObject Msg(string role, string content)\n        => new() { [\"role\"] = role, [\"content\"] = content };\n\n    /// <summary>\n    /// Split argv (argv[0] == command name) into an optional session name\n    /// (<c>-s</c>/<c>--session &lt;name&gt;</c>) and the remaining initial prompt.\n    /// </summary>\n    private static (string? session, string? prompt) ParseLaunchArgs(string[] args)\n    {\n        string? session = null;\n        var rest = new List<string>();\n        for (var i = 1; i < args.Length; i++)\n        {\n            if ((args[i] is \"-s\" or \"--session\") && i + 1 < args.Length)\n            {\n                session = args[++i];\n            }\n            else\n            {\n                rest.Add(args[i]);\n            }\n        }\n        var prompt = rest.Count > 0 ? string.Join(' ', rest).Trim() : null;\n        return (session, prompt);\n    }\n\n    private static JsonElement ParseArgs(string raw)\n    {\n        try\n        {\n            return JsonDocument.Parse(string.IsNullOrWhiteSpace(raw) ? \"{}\" : raw).RootElement.Clone();\n        }\n        catch\n        {\n            return JsonDocument.Parse(\"{}\").RootElement.Clone();\n        }\n    }\n\n    private static string Compact(string s)\n    {\n        s = s.Replace(\"\\n\", \" \").Replace(\"\\r\", \" \");\n        return s.Length > 120 ? s[..120] + \"...\" : s;\n    }\n}\n"}, "4dc73b9e7b24ff410e37dce28a9538b5d64450d5": {"t": 1785756662.139189, "n": 15186, "h": "4bdc207642d17c49", "c": "using System.Text.Json;\nusing System.Text.Json.Nodes;\nusing HCore.Modules.Base;\n\nnamespace HCore.Packages.Agent;\n\n/// <summary>\n/// An interactive agent app. Launched from the shell as <c>agent</c> (optionally\n/// with an initial prompt), it takes over the terminal and runs a chat REPL:\n/// you type, it thinks and uses tools (VFS + shell), it answers, and the\n/// conversation history persists across turns so you can reply to its questions.\n/// Type <c>/exit</c> to quit and return to the shell.\n/// </summary>\npublic class AgentImplement : BaseImplement, IAgent, IOneshotCommand\n{\n    private const string ApiKeyPath = \"/etc/agent/apikey\";\n    private const string ConfigPath = \"/etc/agent/config.json\";\n    private const int MaxSteps = 12;\n\n    private string[] _args = [];\n\n    public void SetArguments(string[] args) => _args = args;\n\n    public void Run()\n    {\n        string apiKey;\n        try\n        {\n            apiKey = LoadApiKey();\n        }\n        catch (Exception ex)\n        {\n            Console.WriteLine($\"agent: {ex.Message}\");\n            return;\n        }\n\n        var (model, baseUrl) = LoadConfig();\n        var client = new DeepseekClient(apiKey, model, baseUrl);\n        var tools = new AgentTools(Vfs, Host, ShellPath());\n        var store = new SessionStore(Vfs);\n\n        // Parse launch args: `agent [-s|--session <name>] [initial prompt...]`.\n        var (sessionArg, promptArg) = ParseLaunchArgs(_args);\n\n        var messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n        string sessionName;\n        if (sessionArg is not null && store.Exists(sessionArg))\n        {\n            sessionName = SessionStore.Sanitize(sessionArg);\n            var restored = store.Load(sessionName);\n            if (restored is not null)\n            {\n                foreach (var m in restored) messages.Add(m?.DeepClone());\n                Console.WriteLine($\"(restored session '{sessionName}' — {restored.Count} messages)\");\n            }\n        }\n        else\n        {\n            sessionName = sessionArg is not null ? SessionStore.Sanitize(sessionArg) : SessionStore.NewName();\n        }\n\n        Console.WriteLine($\"HCore Agent ({model}). Session: {sessionName}. Type your message.\");\n        Console.WriteLine(\"Commands: /exit, /reset, /model <name>, /sessions, /save [name], /load <name>, /new [name], /help.\");\n        Logger.I($\"agent: interactive session started, model={model}, session={sessionName}\");\n\n        // Optional initial prompt passed on the command line: `agent do something`.\n        var pending = string.IsNullOrWhiteSpace(promptArg) ? null : promptArg;\n\n        while (true)\n        {\n            // Honor our own kill signal: if this instance was reaped (e.g. someone\n            // ran `kill` on us), the kernel cancelled StopToken — end the session\n            // instead of lingering as a zombie on the shell's thread.\n            if (StopToken.IsCancellationRequested)\n            {\n                Console.WriteLine(\"agent: this instance was killed — ending session.\");\n                break;\n            }\n\n            string? line;\n            if (!string.IsNullOrEmpty(pending))\n            {\n                line = pending;\n                pending = null;\n                Console.WriteLine($\"you> {line}\");\n            }\n            else\n            {\n                Console.Write(\"you> \");\n                line = Console.ReadLine();\n            }\n\n            if (line is null) break;                 // EOF / Ctrl-D\n            line = line.Trim();\n            if (line.Length == 0) continue;\n\n            if (line is \"/exit\" or \"/quit\") break;\n            if (line == \"/help\")\n            {\n                Console.WriteLine(\n                    \"Commands: /exit quit · /reset clear conversation · /model <name> switch model ·\\n\" +\n                    \"          /sessions list saved · /save [name] save now · /load <name> restore ·\\n\" +\n                    \"          /new [name] start fresh session · /help this help.\");\n                continue;\n            }\n            if (line == \"/reset\")\n            {\n                messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n                Console.WriteLine(\"(conversation reset)\");\n                continue;\n            }\n            if (line == \"/sessions\")\n            {\n                var names = store.List();\n                if (names.Count == 0) Console.WriteLine(\"(no saved sessions)\");\n                else foreach (var n in names)\n                    Console.WriteLine($\"  {(n == sessionName ? \"*\" : \" \")} {n} ({store.Count(n)} messages)\");\n                continue;\n            }\n            if (line == \"/save\" || line.StartsWith(\"/save \"))\n            {\n                var given = line.Length > 5 ? line[5..].Trim() : \"\";\n                if (given.Length > 0) sessionName = SessionStore.Sanitize(given);\n                store.Save(sessionName, model, messages);\n                Console.WriteLine($\"(saved session '{sessionName}')\");\n                continue;\n            }\n            if (line == \"/load\" || line.StartsWith(\"/load \"))\n            {\n                var given = line.Length > 5 ? line[5..].Trim() : \"\";\n                if (given.Length == 0) { Console.WriteLine(\"usage: /load <name>\"); continue; }\n                var restored = store.Load(given);\n                if (restored is null) { Console.WriteLine($\"(no session '{given}')\"); continue; }\n                sessionName = SessionStore.Sanitize(given);\n                messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n                foreach (var m in restored) messages.Add(m?.DeepClone());\n                Console.WriteLine($\"(loaded session '{sessionName}' — {restored.Count} messages)\");\n                continue;\n            }\n            if (line == \"/new\" || line.StartsWith(\"/new \"))\n            {\n                var given = line.Length > 4 ? line[4..].Trim() : \"\";\n                sessionName = given.Length > 0 ? SessionStore.Sanitize(given) : SessionStore.NewName();\n                messages = new JsonArray { Msg(\"system\", SystemPrompt()) };\n                Console.WriteLine($\"(new session '{sessionName}')\");\n                continue;\n            }\n            if (line == \"/model\" || line.StartsWith(\"/model \"))\n            {\n                var requested = line.Length > 6 ? line[6..].Trim() : \"\";\n                if (requested.Length == 0) { Console.WriteLine($\"model: {model}\"); continue; }\n                model = requested;\n                SaveModel(model, baseUrl);\n                client = new DeepseekClient(apiKey, model, baseUrl);\n                Console.WriteLine($\"(model set to {model})\");\n                continue;\n            }\n\n            // Hot-reload config each turn so edits to /etc/agent/config.json\n            // (by you, or by the agent itself via a tool) take effect live.\n            var (curModel, curBase) = LoadConfig();\n            if (curModel != model || curBase != baseUrl)\n            {\n                model = curModel;\n                baseUrl = curBase;\n                client = new DeepseekClient(apiKey, model, baseUrl);\n                Console.WriteLine($\"(config reloaded: model={model})\");\n            }\n\n            messages.Add(Msg(\"user\", line));\n            if (!RunTurn(client, tools, messages))\n                break; // fatal API error already reported\n\n            // Auto-persist the conversation so it survives crashes / kills.\n            try { store.Save(sessionName, model, messages); }\n            catch (Exception ex) { Logger.W($\"agent: session save failed: {ex.Message}\"); }\n        }\n\n        Console.WriteLine($\"agent: session '{sessionName}' ended.\");\n        Logger.I($\"agent: interactive session '{sessionName}' ended.\");\n    }\n\n    /// <summary>\n    /// Drive one user turn: call the model, execute any tool calls, loop until it\n    /// produces a plain-text answer (or the step budget runs out). Returns false\n    /// only on a fatal API error (caller should stop the session).\n    /// </summary>\n    private bool RunTurn(DeepseekClient client, AgentTools tools, JsonArray messages)\n    {\n        for (var step = 0; step < MaxSteps; step++)\n        {\n            JsonNode message;\n            try\n            {\n                message = client.Chat(messages, AgentTools.Schema);\n            }\n            catch (Exception ex)\n            {\n                Console.WriteLine($\"agent: request failed: {ex.Message}\");\n                Logger.E($\"agent request failed: {ex.Message}\");\n                return false;\n            }\n\n            messages.Add(message.DeepClone());\n\n            var toolCalls = message[\"tool_calls\"] as JsonArray;\n            if (toolCalls is { Count: > 0 })\n            {\n                foreach (var call in toolCalls)\n                {\n                    if (call is null) continue;\n                    var id = call[\"id\"]?.GetValue<string>() ?? \"\";\n                    var fn = call[\"function\"];\n                    var name = fn?[\"name\"]?.GetValue<string>() ?? \"\";\n                    var argsRaw = fn?[\"arguments\"]?.GetValue<string>() ?? \"{}\";\n\n                    var args = ParseArgs(argsRaw);\n                    Console.WriteLine($\"  [tool] {name}({Compact(argsRaw)})\");\n                    var result = tools.Invoke(name, args);\n                    Logger.I($\"agent tool {name} -> {result.Length} chars\");\n\n                    messages.Add(new JsonObject\n                    {\n                        [\"role\"] = \"tool\",\n                        [\"tool_call_id\"] = id,\n                        [\"content\"] = result,\n                    });\n                }\n                continue;\n            }\n\n            var content = message[\"content\"]?.GetValue<string>() ?? \"\";\n            Console.WriteLine($\"agent> {content.Trim()}\");\n            return true;\n        }\n\n        Console.WriteLine($\"agent: stopped after {MaxSteps} steps without a final answer.\");\n        return true;\n    }\n\n    private string ShellPath()\n    {\n        var name = InstanceName;\n        var slash = name.LastIndexOf('/');\n        return slash > 0 ? name[..slash] : \"init/console\";\n    }\n\n    private string LoadApiKey()\n    {\n        if (Vfs.Exists(ApiKeyPath))\n        {\n            var key = Vfs.ReadAllText(ApiKeyPath).Trim();\n            if (key.Length > 0) return key;\n        }\n\n        var env = Environment.GetEnvironmentVariable(\"DEEPSEEK_API_KEY\");\n        if (!string.IsNullOrWhiteSpace(env)) return env.Trim();\n\n        throw new InvalidOperationException(\n            $\"no API key. Put it in {ApiKeyPath} or set DEEPSEEK_API_KEY.\");\n    }\n\n    private (string model, string baseUrl) LoadConfig()\n    {\n        var model = \"deepseek-chat\";\n        var baseUrl = \"https://api.deepseek.com\";\n        try\n        {\n            if (Vfs.Exists(ConfigPath))\n            {\n                var doc = JsonNode.Parse(Vfs.ReadAllText(ConfigPath));\n                model = doc?[\"model\"]?.GetValue<string>() ?? model;\n                baseUrl = doc?[\"baseUrl\"]?.GetValue<string>() ?? baseUrl;\n            }\n        }\n        catch { /* fall back to defaults */ }\n        return (model, baseUrl);\n    }\n\n    private void SaveModel(string model, string baseUrl)\n    {\n        try\n        {\n            var cfg = new JsonObject { [\"model\"] = model, [\"baseUrl\"] = baseUrl };\n            Vfs.WriteAllText(ConfigPath, cfg.ToJsonString());\n        }\n        catch (Exception ex)\n        {\n            Console.WriteLine($\"(warning: could not persist config: {ex.Message})\");\n        }\n    }\n\n    private string SystemPrompt()\n    {\n        return\n            \"You are an autonomous agent running inside HCore, a microkernel with a \" +\n            \"virtual filesystem (VFS). You help the user by reasoning and using tools.\\n\" +\n            \"\\n\" +\n            \"Environment:\\n\" +\n            $\"- Your instance name: {InstanceName}\\n\" +\n            $\"- Current working directory: {Vfs.WorkingDirectory}\\n\" +\n            \"- The VFS layout: /packs (installed packages), /proc (running module \" +\n            \"instances, read-only), /etc (config + services), /home, /data.\\n\" +\n            \"\\n\" +\n            \"Tools: vfs_list(path), vfs_read(path), vfs_write(path, content, append?), \" +\n            \"shell(command), pkg_build(name, source). Use vfs_* for direct file access; use \" +\n            \"shell to run HShell command lines and interact with modules (ls, cat, spawn, run, \" +\n            \"kill, service, hpm, ...). Use pkg_build to CREATE, COMPILE and HOT-LOAD a brand-new \" +\n            \"HCore package from C# source on the fly, then 'spawn'/'run' it via shell — a full \" +\n            \"write→compile→(read errors)→fix→run→debug loop, all without a reboot. \" +\n            \"All paths are VFS paths. Use tools to inspect or act on the system \" +\n            \"before answering. When you have the answer, reply in plain text with no tool \" +\n            \"call. Be concise.\\n\" +\n            \"\\n\" +\n            \"This is an ongoing, multi-turn conversation with the user at a terminal. \" +\n            \"If a request is ambiguous or you need more information, ask the user a \" +\n            \"clarifying question in plain text (no tool call) and wait for their reply.\\n\" +\n            \"\\n\" +\n            \"About yourself: you run as a one-shot interactive command spawned by the \" +\n            \"shell (instance under init/console), NOT as a registered service. So \" +\n            $\"'service stop {InstanceName}' or 'service start agent' will NOT affect this \" +\n            \"session — there is no 'agent' service. Your model/endpoint come from \" +\n            \"/etc/agent/config.json and are hot-reloaded every turn: if you (or the user) \" +\n            \"change 'model' there, it takes effect on the next message automatically — no \" +\n            \"restart needed. The user can also switch models with the /model command.\";\n    }\n\n    private static JsonObject Msg(string role, string content)\n        => new() { [\"role\"] = role, [\"content\"] = content };\n\n    /// <summary>\n    /// Split argv (argv[0] == command name) into an optional session name\n    /// (<c>-s</c>/<c>--session &lt;name&gt;</c>) and the remaining initial prompt.\n    /// </summary>\n    private static (string? session, string? prompt) ParseLaunchArgs(string[] args)\n    {\n        string? session = null;\n        var rest = new List<string>();\n        for (var i = 1; i < args.Length; i++)\n        {\n            if ((args[i] is \"-s\" or \"--session\") && i + 1 < args.Length)\n            {\n                session = args[++i];\n            }\n            else\n            {\n                rest.Add(args[i]);\n            }\n        }\n        var prompt = rest.Count > 0 ? string.Join(' ', rest).Trim() : null;\n        return (session, prompt);\n    }\n\n    private static JsonElement ParseArgs(string raw)\n    {\n        try\n        {\n            return JsonDocument.Parse(string.IsNullOrWhiteSpace(raw) ? \"{}\" : raw).RootElement.Clone();\n        }\n        catch\n        {\n            return JsonDocument.Parse(\"{}\").RootElement.Clone();\n        }\n    }\n\n    private static string Compact(string s)\n    {\n        s = s.Replace(\"\\n\", \" \").Replace(\"\\r\", \" \");\n        return s.Length > 120 ? s[..120] + \"...\" : s;\n    }\n}\n"}}}}