diff --git a/packages/kbot/cpp/orchestrator/test-ipc-classifier.mjs b/packages/kbot/cpp/orchestrator/test-ipc-classifier.mjs
index d2a8b7c7..d8c473ce 100644
--- a/packages/kbot/cpp/orchestrator/test-ipc-classifier.mjs
+++ b/packages/kbot/cpp/orchestrator/test-ipc-classifier.mjs
@@ -11,6 +11,7 @@
  *   npm run test:ipc:classifier -- -r openrouter -m openai/gpt-4o-mini --backend remote -n 3 -F structured
  *   npm run test:ipc:classifier -- -r openrouter -m x -F stress,no-heartbeat
  *   npm run test:ipc:classifier -- -r openrouter -m x --backend remote -n 3 -F stress,structured
+ *   npm run test:ipc:classifier -- -r openrouter -m x --backend remote -F structured --dst ./out.json
  *
  * Env:
  *   KBOT_IPC_CLASSIFIER_LLAMA — set 0 to use OpenRouter (KBOT_ROUTER, KBOT_IPC_MODEL) instead of local llama :8888
@@ -30,7 +31,7 @@
 
 import { spawn } from 'node:child_process';
 import { mkdir, writeFile } from 'node:fs/promises';
-import { dirname } from 'node:path';
+import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 import net from 'node:net';
 import { existsSync, unlinkSync } from 'node:fs';
@@ -64,7 +65,7 @@ import {
   writeTestReports,
 } from './reports.js';
 
-const __dirname = dirname(fileURLToPath(import.meta.url));
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 /** Set at run start; used by catch for error reports */
 let classifierMetricsCollector = null;
 let classifierRunStartedAt = null;
@@ -136,6 +137,16 @@ export function parseClassifierArgv() {
       describe:
         'Feature flags (repeat or comma-separated): stress, structured, no-heartbeat, no-report, quiet',
     })
+    .option('dst', {
+      type: 'string',
+      describe:
+        'Forwarded to kbot-ai IPC `dst` (worker writes completion text here; path resolved from cwd). Same as C++ --dst.',
+    })
+    .option('output', {
+      type: 'string',
+      describe:
+        'Forwarded to IPC if --dst omitted (C++ `output` field). Prefer --dst when both are set.',
+    })
     .strict()
     .help()
     .alias('h', 'help');
@@ -417,6 +428,12 @@ function buildKbotAiPayload(labels, tmo) {
   if (structured) {
     payload.response_format = { type: 'json_object' };
   }
+
+  const rawDst = classifierArgv?.dst || classifierArgv?.output;
+  if (rawDst != null && String(rawDst).trim() !== '') {
+    payload.dst = path.resolve(process.cwd(), String(rawDst).trim());
+  }
+
   return payload;
 }
 
@@ -663,6 +680,13 @@ async function run() {
       backend: useLlama ? 'local' : 'remote',
       stressRuns: nRuns,
       structuredOutput: !useLlama && classifierFeatures.has('structured'),
+      dst:
+        classifierArgv?.dst || classifierArgv?.output
+          ? path.resolve(
+              process.cwd(),
+              String(classifierArgv.dst || classifierArgv.output).trim()
+            )
+          : null,
     },
     env: {
       KBOT_IPC_CLASSIFIER_LLAMA: process.env.KBOT_IPC_CLASSIFIER_LLAMA ?? null,
@@ -725,7 +749,7 @@ async function run() {
 
     /** Array-only artifact (same timestamp as main report). */
     arrayPath = reportFilePathWithExt('test-ipc-classifier-distances', '.json', { cwd, now: reportNow });
-    await mkdir(dirname(arrayPath), { recursive: true });
+    await mkdir(path.dirname(arrayPath), { recursive: true });
     await writeFile(arrayPath, `${JSON.stringify(distances, null, 2)}\n`, 'utf8');
   }
 
diff --git a/packages/kbot/cpp/packages/kbot/kbot.cpp b/packages/kbot/cpp/packages/kbot/kbot.cpp
index 09509d56..43ef5eaf 100644
--- a/packages/kbot/cpp/packages/kbot/kbot.cpp
+++ b/packages/kbot/cpp/packages/kbot/kbot.cpp
@@ -1,5 +1,7 @@
 #include "kbot.h"
 #include "source_files.h"
+#include <fstream>
+#include <filesystem>
 #include <iostream>
 #include "logger/logger.h"
 #include "llm_client.h"
@@ -12,6 +14,76 @@ namespace kbot {
 
 namespace {
 
+namespace fs = std::filesystem;
+
+static void replace_all(std::string &s, const std::string &from, const std::string &to) {
+  std::size_t pos = 0;
+  while ((pos = s.find(from, pos)) != std::string::npos) {
+    s.replace(pos, from.length(), to);
+    pos += to.length();
+  }
+}
+
+static std::string model_basename(const std::string &model) {
+  if (model.empty())
+    return "unknown_model";
+  const auto slash = model.find_last_of("/\\");
+  if (slash == std::string::npos)
+    return model;
+  return model.substr(slash + 1);
+}
+
+static std::string expand_dst_path(const KBotOptions &opts, std::string raw) {
+  const std::string m = model_basename(opts.model);
+  const std::string r = opts.router.empty() ? std::string("unknown_router") : opts.router;
+  replace_all(raw, "${MODEL}", m);
+  replace_all(raw, "${MODEL_NAME}", m);
+  replace_all(raw, "${ROUTER}", r);
+  return raw;
+}
+
+/** Same idea as TS `onCompletion`: write to --dst / --output; `dst` wins over legacy `output` if both set. */
+static std::string effective_completion_dst(const KBotOptions &opts) {
+  if (!opts.dst.empty())
+    return opts.dst;
+  return opts.output;
+}
+
+/** @returns true if wrote to file (caller should skip printing body to stdout). */
+static bool try_write_completion_to_dst(const KBotOptions &opts, const std::string &text) {
+  const std::string raw = effective_completion_dst(opts);
+  if (raw.empty())
+    return false;
+
+  std::string expanded = expand_dst_path(opts, raw);
+  fs::path p;
+  try {
+    p = fs::absolute(expanded);
+  } catch (const std::exception &e) {
+    logger::error(std::string("Invalid output path: ") + e.what());
+    return false;
+  }
+
+  std::error_code ec;
+  fs::create_directories(p.parent_path(), ec);
+  if (ec) {
+    logger::error("Failed to create output directories: " + ec.message());
+    return false;
+  }
+
+  const bool append_existing = (opts.append != "replace") && fs::exists(p);
+  std::ofstream out(p, std::ios::binary | (append_existing ? std::ios::app : std::ios::trunc));
+  if (!out) {
+    logger::error("Failed to open output file: " + p.string());
+    return false;
+  }
+  out << text;
+  if (!text.empty() && text.back() != '\n')
+    out.put('\n');
+  logger::info(std::string(append_existing ? "Appended completion to " : "Wrote completion to ") + p.string());
+  return true;
+}
+
 std::string json_job_result_ai(bool success, const std::string &text_or_error, bool is_text,
                                const std::string &provider_meta_json = {}) {
   nlohmann::json o;
@@ -63,7 +135,8 @@ int run_kbot_ai_pipeline(const KBotOptions &opts, const KBotCallbacks &cb) {
   LLMResponse res = client.execute_chat(target_prompt);
 
   if (res.success) {
-    std::cout << res.text << "\n";
+    if (!try_write_completion_to_dst(opts, res.text))
+      std::cout << res.text << "\n";
     if (cb.onEvent) {
       cb.onEvent("ai_progress",
                  "{\"message\":\"Task completion received\",\"has_text\":true}");
diff --git a/packages/kbot/cpp/src/cmd_kbot.cpp b/packages/kbot/cpp/src/cmd_kbot.cpp
index b032c872..ef0209c5 100644
--- a/packages/kbot/cpp/src/cmd_kbot.cpp
+++ b/packages/kbot/cpp/src/cmd_kbot.cpp
@@ -42,8 +42,11 @@ CLI::App* setup_cmd_kbot(CLI::App& app) {
     ai_cmd->add_option("-p,--path", g_kbot_opts.path, "Target directory")->default_val(".");
     ai_cmd->add_option("--prompt", g_kbot_opts.prompt, "The prompt. Supports file paths and vars.");
     ai_cmd->add_option("-c,--config", g_kbot_opts.config_path, "Config file for API Keys")->default_val("config/postgres.toml");
-    ai_cmd->add_option("--output", g_kbot_opts.output, "Optional output path for modified files");
-    ai_cmd->add_option("--dst", g_kbot_opts.dst, "Optional destination path for the result");
+    /* Same destination as TS `onCompletion`: write LLM text here (--dst wins if both appear in IPC JSON). */
+    ai_cmd->add_option(
+        "--dst,--output",
+        g_kbot_opts.dst,
+        "Write completion result to this path (${MODEL}, ${ROUTER} expanded). Same as --output.");
     ai_cmd->add_option("--append", g_kbot_opts.append, "How to handle output if --dst exists: concat|merge|replace")->default_val("concat");
     ai_cmd->add_option("--wrap", g_kbot_opts.wrap, "Specify how to wrap output: meta|none")->default_val("none");
     ai_cmd->add_option("--each", g_kbot_opts.each, "Iterate over items (GLOB, JSON, array)");
@@ -146,6 +149,12 @@ int run_kbot_ai_ipc(const std::string& payload, const std::string& jobId, const
                 opts.response_format_json = rf.GetString();
             }
         }
+        if (doc.HasMember("dst") && doc["dst"].IsString())
+            opts.dst = doc["dst"].GetString();
+        if (doc.HasMember("output") && doc["output"].IsString()) {
+            if (opts.dst.empty())
+                opts.dst = doc["output"].GetString();
+        }
     }
 
     if (opts.api_key.empty()) {