fix: document /models directive regression (#1753) (thanks @uos-status)

* feat(tts): support custom OpenAI-compatible TTS endpoints

Add OPENAI_TTS_BASE_URL environment variable to allow using self-hosted
or third-party OpenAI-compatible TTS services like Kokoro, LocalAI, or
OpenedAI-Speech.

Changes:
- Add OPENAI_TTS_BASE_URL env var (defaults to OpenAI official API)
- Relax model/voice validation when using custom endpoints
- Add tts-1 and tts-1-hd to the model allowlist

This enables users to:
- Use local TTS for privacy and cost savings
- Use models with better non-English language support (Chinese, Japanese)
- Reduce latency with local inference

Example usage:
  OPENAI_TTS_BASE_URL=http://localhost:8880/v1

Tested with Kokoro-FastAPI.

* fix: strip trailing slashes from OPENAI_TTS_BASE_URL

Address review feedback: normalize the base URL by removing trailing
slashes to prevent double-slash paths like /v1//audio/speech which
cause 404 errors on some OpenAI-compatible servers.

* style: format code with oxfmt

* test: update tests for expanded OpenAI TTS model list

- Accept tts-1 and tts-1-hd as valid models
- Update OPENAI_TTS_MODELS length expectation to 3

---------

Co-authored-by: zhixian <zhixian@bunker.local>

CHANGELOG.md

@@ -28,6 +28,7 @@ Docs: https://docs.clawd.bot
 - Web UI: hide internal `message_id` hints in chat bubbles.
 - Web UI: show Stop button during active runs, swap back to New session when idle. (#1664) Thanks @ndbroadbent.
 - Web UI: clear stale disconnect banners on reconnect; allow form saves with unsupported schema paths but block missing schema. (#1707) Thanks @Glucksberg.
+- Auto-reply: don't treat `/models` as a `/model` directive. (#1753) Thanks @uos-status.
 - Heartbeat: normalize target identifiers for consistent routing.
 - TUI: reload history after gateway reconnect to restore session state. (#1663)
 - Telegram: use wrapped fetch for long-polling on Node to normalize AbortSignal handling. (#1639)
@@ -42,6 +43,7 @@ Docs: https://docs.clawd.bot
 - Gateway: reduce log noise for late invokes + remote node probes; debounce skills refresh. (#1607) Thanks @petter-b.
 - Gateway: clarify Control UI/WebChat auth error hints for missing tokens. (#1690)
 - Gateway: listen on IPv6 loopback when bound to 127.0.0.1 so localhost webhooks work.
+- Gateway: store lock files in the temp directory to avoid stale locks on persistent volumes. (#1676)
 - macOS: default direct-transport `ws://` URLs to port 18789; document `gateway.remote.transport`. (#1603) Thanks @ngutman.
 - Voice Call: return stream TwiML for outbound conversation calls on initial Twilio webhook. (#1634)
 - Google Chat: tighten email allowlist matching, typing cleanup, media caps, and onboarding/docs/tests. (#1635) Thanks @iHildy.

docs/concepts/model-providers.md

@@ -89,6 +89,8 @@ Clawdbot ships with the pi‑ai catalog. These providers require **no**
 - Gemini CLI OAuth is shipped as a bundled plugin (`google-gemini-cli-auth`, disabled by default).
   - Enable: `clawdbot plugins enable google-gemini-cli-auth`
   - Login: `clawdbot models auth login --provider google-gemini-cli --set-default`
+  - Note: you do **not** paste a client id or secret into `clawdbot.json`. The CLI login flow stores
+    tokens in auth profiles on the gateway host.
 
 ### Z.AI (GLM)
 

docs/help/faq.md

@@ -24,6 +24,7 @@ Quick answers plus deeper troubleshooting for real-world setups (local dev, VPS,
   - [How do I try the latest bits?](#how-do-i-try-the-latest-bits)
   - [How long does install and onboarding usually take?](#how-long-does-install-and-onboarding-usually-take)
   - [Installer stuck? How do I get more feedback?](#installer-stuck-how-do-i-get-more-feedback)
+  - [Windows install says git not found or clawdbot not recognized](#windows-install-says-git-not-found-or-clawdbot-not-recognized)
   - [The docs didn’t answer my question - how do I get a better answer?](#the-docs-didnt-answer-my-question-how-do-i-get-a-better-answer)
   - [How do I install Clawdbot on Linux?](#how-do-i-install-clawdbot-on-linux)
   - [How do I install Clawdbot on a VPS?](#how-do-i-install-clawdbot-on-a-vps)
@@ -39,6 +40,7 @@ Quick answers plus deeper troubleshooting for real-world setups (local dev, VPS,
   - [Is AWS Bedrock supported?](#is-aws-bedrock-supported)
   - [How does Codex auth work?](#how-does-codex-auth-work)
   - [Do you support OpenAI subscription auth (Codex OAuth)?](#do-you-support-openai-subscription-auth-codex-oauth)
+  - [How do I set up Gemini CLI OAuth](#how-do-i-set-up-gemini-cli-oauth)
   - [Is a local model OK for casual chats?](#is-a-local-model-ok-for-casual-chats)
   - [How do I keep hosted model traffic in a specific region?](#how-do-i-keep-hosted-model-traffic-in-a-specific-region)
   - [Do I have to buy a Mac Mini to install this?](#do-i-have-to-buy-a-mac-mini-to-install-this)
@@ -511,6 +513,26 @@ curl -fsSL https://clawd.bot/install.sh | bash -s -- --install-method git --verb
 
 More options: [Installer flags](/install/installer).
 
+### Windows install says git not found or clawdbot not recognized
+
+Two common Windows issues:
+
+**1) npm error spawn git / git not found**
+- Install **Git for Windows** and make sure `git` is on your PATH.
+- Close and reopen PowerShell, then re-run the installer.
+
+**2) clawdbot is not recognized after install**
+- Your npm global bin folder is not on PATH.
+- Check the path:
+  ```powershell
+  npm config get prefix
+  ```
+- Ensure `<prefix>\\bin` is on PATH (on most systems it is `%AppData%\\npm`).
+- Close and reopen PowerShell after updating PATH.
+
+If you want the smoothest Windows setup, use **WSL2** instead of native Windows.
+Docs: [Windows](/platforms/windows).
+
 ### The docs didnt answer my question how do I get a better answer
 
 Use the **hackable (git) install** so you have the full source and docs locally, then ask
@@ -610,9 +632,10 @@ Docs: [Anthropic](/providers/anthropic), [OpenAI](/providers/openai),
 Yes. You can authenticate with **Claude Code CLI OAuth** or a **setup-token**
 instead of an API key. This is the subscription path.
 
-Important: you must verify with Anthropic that this usage is allowed under
-their subscription policy and terms. If you want the most explicit, supported
-path, use an Anthropic API key.
+Claude Pro/Max subscriptions **do not include an API key**, so this is the
+correct approach for subscription accounts. Important: you must verify with
+Anthropic that this usage is allowed under their subscription policy and terms.
+If you want the most explicit, supported path, use an Anthropic API key.
 
 ### How does Anthropic setuptoken auth work
 
@@ -664,6 +687,16 @@ can import the CLI login or run the OAuth flow for you.
 
 See [OAuth](/concepts/oauth), [Model providers](/concepts/model-providers), and [Wizard](/start/wizard).
 
+### How do I set up Gemini CLI OAuth
+
+Gemini CLI uses a **plugin auth flow**, not a client id or secret in `clawdbot.json`.
+
+Steps:
+1) Enable the plugin: `clawdbot plugins enable google-gemini-cli-auth`
+2) Login: `clawdbot models auth login --provider google-gemini-cli --set-default`
+
+This stores OAuth tokens in auth profiles on the gateway host. Details: [Model providers](/concepts/model-providers).
+
 ### Is a local model OK for casual chats
 
 Usually no. Clawdbot needs large context + strong safety; small cards truncate and leak. If you must, run the **largest** MiniMax M2.1 build you can locally (LM Studio) and see [/gateway/local-models](/gateway/local-models). Smaller/quantized models increase prompt-injection risk - see [Security](/gateway/security).

docs/plugin.md

@@ -67,6 +67,22 @@ Plugins can register:
 Plugins run **in‑process** with the Gateway, so treat them as trusted code.
 Tool authoring guide: [Plugin agent tools](/plugins/agent-tools).
 
+## Runtime helpers
+
+Plugins can access selected core helpers via `api.runtime`. For telephony TTS:
+
+```ts
+const result = await api.runtime.tts.textToSpeechTelephony({
+  text: "Hello from Clawdbot",
+  cfg: api.config,
+});
+```
+
+Notes:
+- Uses core `messages.tts` configuration (OpenAI or ElevenLabs).
+- Returns PCM audio buffer + sample rate. Plugins must resample/encode for providers.
+- Edge TTS is not supported for telephony.
+
 ## Discovery & precedence
 
 Clawdbot scans, in order:

docs/plugins/voice-call.md

@@ -104,6 +104,87 @@ Notes:
 - `mock` is a local dev provider (no network calls).
 - `skipSignatureVerification` is for local testing only.
 
+## TTS for calls
+
+Voice Call uses the core `messages.tts` configuration (OpenAI or ElevenLabs) for
+streaming speech on calls. You can override it under the plugin config with the
+**same shape** — it deep‑merges with `messages.tts`.
+
+```json5
+{
+  tts: {
+    provider: "elevenlabs",
+    elevenlabs: {
+      voiceId: "pMsXgVXv3BLzUgSXRplE",
+      modelId: "eleven_multilingual_v2"
+    }
+  }
+}
+```
+
+Notes:
+- **Edge TTS is ignored for voice calls** (telephony audio needs PCM; Edge output is unreliable).
+- Core TTS is used when Twilio media streaming is enabled; otherwise calls fall back to provider native voices.
+
+### More examples
+
+Use core TTS only (no override):
+
+```json5
+{
+  messages: {
+    tts: {
+      provider: "openai",
+      openai: { voice: "alloy" }
+    }
+  }
+}
+```
+
+Override to ElevenLabs just for calls (keep core default elsewhere):
+
+```json5
+{
+  plugins: {
+    entries: {
+      "voice-call": {
+        config: {
+          tts: {
+            provider: "elevenlabs",
+            elevenlabs: {
+              apiKey: "elevenlabs_key",
+              voiceId: "pMsXgVXv3BLzUgSXRplE",
+              modelId: "eleven_multilingual_v2"
+            }
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+Override only the OpenAI model for calls (deep‑merge example):
+
+```json5
+{
+  plugins: {
+    entries: {
+      "voice-call": {
+        config: {
+          tts: {
+            openai: {
+              model: "gpt-4o-mini-tts",
+              voice: "marin"
+            }
+          }
+        }
+      }
+    }
+  }
+}
+```
+
 ## Inbound calls
 
 Inbound policy defaults to `disabled`. To enable inbound calls, set:

docs/railway.mdx

@@ -16,7 +16,7 @@ and you configure everything via the `/setup` web wizard.
 
 ## One-click deploy
 
-<a href="https://railway.com/deploy/clawdbot-railway-template" target="_blank" rel="noreferrer">Deploy on Railway</a>
+<a href="https://railway.app/new/template?template=https://github.com/vignesh07/clawdbot-railway-template" target="_blank" rel="noreferrer">Deploy on Railway</a>
 
 After deploy, find your public URL in **Railway → your service → Settings → Domains**.
 
@@ -55,6 +55,7 @@ Attach a volume mounted at:
 Set these variables on the service:
 
 - `SETUP_PASSWORD` (required)
+- `PORT=8080` (required — must match the port in Public Networking)
 - `CLAWDBOT_STATE_DIR=/data/.clawdbot` (recommended)
 - `CLAWDBOT_WORKSPACE_DIR=/data/workspace` (recommended)
 - `CLAWDBOT_GATEWAY_TOKEN` (recommended; treat as an admin secret)
@@ -82,8 +83,9 @@ If Telegram DMs are set to pairing, the setup wizard can approve the pairing cod
 1) Go to https://discord.com/developers/applications
 2) **New Application** → choose a name
 3) **Bot** → **Add Bot**
-4) Copy the **Bot Token** and paste into `/setup`
-5) Invite the bot to your server (OAuth2 URL Generator; scopes: `bot`, `applications.commands`)
+4) **Enable MESSAGE CONTENT INTENT** under Bot → Privileged Gateway Intents (required or the bot will crash on startup)
+5) Copy the **Bot Token** and paste into `/setup`
+6) Invite the bot to your server (OAuth2 URL Generator; scopes: `bot`, `applications.commands`)
 
 ## Backups & migration
 

extensions/voice-call/CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## 2026.1.24
+
+### Changes
+- Breaking: voice-call TTS now uses core `messages.tts` (plugin TTS config deep‑merges with core).
+- Telephony TTS supports OpenAI + ElevenLabs; Edge TTS is ignored for calls.
+- Removed legacy `tts.model`/`tts.voice`/`tts.instructions` plugin fields.
+
 ## 2026.1.23
 
 ### Changes

extensions/voice-call/README.md

@@ -75,6 +75,27 @@ Notes:
 - Twilio/Telnyx/Plivo require a **publicly reachable** webhook URL.
 - `mock` is a local dev provider (no network calls).
 
+## TTS for calls
+
+Voice Call uses the core `messages.tts` configuration (OpenAI or ElevenLabs) for
+streaming speech on calls. You can override it under the plugin config with the
+same shape — overrides deep-merge with `messages.tts`.
+
+```json5
+{
+  tts: {
+    provider: "openai",
+    openai: {
+      voice: "alloy"
+    }
+  }
+}
+```
+
+Notes:
+- Edge TTS is ignored for voice calls (telephony audio needs PCM; Edge output is unreliable).
+- Core TTS is used when Twilio media streaming is enabled; otherwise calls fall back to provider native voices.
+
 ## CLI
 
 ```bash

extensions/voice-call/clawdbot.plugin.json

@@ -99,16 +99,39 @@
       "label": "Media Stream Path",
       "advanced": true
     },
-    "tts.model": {
-      "label": "TTS Model",
+    "tts.provider": {
+      "label": "TTS Provider Override",
+      "help": "Deep-merges with messages.tts (Edge is ignored for calls).",
       "advanced": true
     },
-    "tts.voice": {
-      "label": "TTS Voice",
+    "tts.openai.model": {
+      "label": "OpenAI TTS Model",
       "advanced": true
     },
-    "tts.instructions": {
-      "label": "TTS Instructions",
+    "tts.openai.voice": {
+      "label": "OpenAI TTS Voice",
+      "advanced": true
+    },
+    "tts.openai.apiKey": {
+      "label": "OpenAI API Key",
+      "sensitive": true,
+      "advanced": true
+    },
+    "tts.elevenlabs.modelId": {
+      "label": "ElevenLabs Model ID",
+      "advanced": true
+    },
+    "tts.elevenlabs.voiceId": {
+      "label": "ElevenLabs Voice ID",
+      "advanced": true
+    },
+    "tts.elevenlabs.apiKey": {
+      "label": "ElevenLabs API Key",
+      "sensitive": true,
+      "advanced": true
+    },
+    "tts.elevenlabs.baseUrl": {
+      "label": "ElevenLabs Base URL",
       "advanced": true
     },
     "publicUrl": {
@@ -370,20 +393,193 @@
         "type": "object",
         "additionalProperties": false,
         "properties": {
+          "auto": {
+            "type": "string",
+            "enum": [
+              "off",
+              "always",
+              "inbound",
+              "tagged"
+            ]
+          },
+          "enabled": {
+            "type": "boolean"
+          },
+          "mode": {
+            "type": "string",
+            "enum": [
+              "final",
+              "all"
+            ]
+          },
           "provider": {
             "type": "string",
             "enum": [
-              "openai"
+              "openai",
+              "elevenlabs",
+              "edge"
             ]
           },
-          "model": {
+          "summaryModel": {
             "type": "string"
           },
-          "voice": {
+          "modelOverrides": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+              "enabled": {
+                "type": "boolean"
+              },
+              "allowText": {
+                "type": "boolean"
+              },
+              "allowProvider": {
+                "type": "boolean"
+              },
+              "allowVoice": {
+                "type": "boolean"
+              },
+              "allowModelId": {
+                "type": "boolean"
+              },
+              "allowVoiceSettings": {
+                "type": "boolean"
+              },
+              "allowNormalization": {
+                "type": "boolean"
+              },
+              "allowSeed": {
+                "type": "boolean"
+              }
+            }
+          },
+          "elevenlabs": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+              "apiKey": {
+                "type": "string"
+              },
+              "baseUrl": {
+                "type": "string"
+              },
+              "voiceId": {
+                "type": "string"
+              },
+              "modelId": {
+                "type": "string"
+              },
+              "seed": {
+                "type": "integer",
+                "minimum": 0,
+                "maximum": 4294967295
+              },
+              "applyTextNormalization": {
+                "type": "string",
+                "enum": [
+                  "auto",
+                  "on",
+                  "off"
+                ]
+              },
+              "languageCode": {
+                "type": "string"
+              },
+              "voiceSettings": {
+                "type": "object",
+                "additionalProperties": false,
+                "properties": {
+                  "stability": {
+                    "type": "number",
+                    "minimum": 0,
+                    "maximum": 1
+                  },
+                  "similarityBoost": {
+                    "type": "number",
+                    "minimum": 0,
+                    "maximum": 1
+                  },
+                  "style": {
+                    "type": "number",
+                    "minimum": 0,
+                    "maximum": 1
+                  },
+                  "useSpeakerBoost": {
+                    "type": "boolean"
+                  },
+                  "speed": {
+                    "type": "number",
+                    "minimum": 0.5,
+                    "maximum": 2
+                  }
+                }
+              }
+            }
+          },
+          "openai": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+              "apiKey": {
+                "type": "string"
+              },
+              "model": {
+                "type": "string"
+              },
+              "voice": {
+                "type": "string"
+              }
+            }
+          },
+          "edge": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+              "enabled": {
+                "type": "boolean"
+              },
+              "voice": {
+                "type": "string"
+              },
+              "lang": {
+                "type": "string"
+              },
+              "outputFormat": {
+                "type": "string"
+              },
+              "pitch": {
+                "type": "string"
+              },
+              "rate": {
+                "type": "string"
+              },
+              "volume": {
+                "type": "string"
+              },
+              "saveSubtitles": {
+                "type": "boolean"
+              },
+              "proxy": {
+                "type": "string"
+              },
+              "timeoutMs": {
+                "type": "integer",
+                "minimum": 1000,
+                "maximum": 120000
+              }
+            }
+          },
+          "prefsPath": {
             "type": "string"
           },
-          "instructions": {
-            "type": "string"
+          "maxTextLength": {
+            "type": "integer",
+            "minimum": 1
+          },
+          "timeoutMs": {
+            "type": "integer",
+            "minimum": 1000,
+            "maximum": 120000
           }
         }
       },

extensions/voice-call/index.ts

@@ -74,9 +74,26 @@ const voiceCallConfigSchema = {
     },
     "streaming.sttModel": { label: "Realtime STT Model", advanced: true },
     "streaming.streamPath": { label: "Media Stream Path", advanced: true },
-    "tts.model": { label: "TTS Model", advanced: true },
-    "tts.voice": { label: "TTS Voice", advanced: true },
-    "tts.instructions": { label: "TTS Instructions", advanced: true },
+    "tts.provider": {
+      label: "TTS Provider Override",
+      help: "Deep-merges with messages.tts (Edge is ignored for calls).",
+      advanced: true,
+    },
+    "tts.openai.model": { label: "OpenAI TTS Model", advanced: true },
+    "tts.openai.voice": { label: "OpenAI TTS Voice", advanced: true },
+    "tts.openai.apiKey": {
+      label: "OpenAI API Key",
+      sensitive: true,
+      advanced: true,
+    },
+    "tts.elevenlabs.modelId": { label: "ElevenLabs Model ID", advanced: true },
+    "tts.elevenlabs.voiceId": { label: "ElevenLabs Voice ID", advanced: true },
+    "tts.elevenlabs.apiKey": {
+      label: "ElevenLabs API Key",
+      sensitive: true,
+      advanced: true,
+    },
+    "tts.elevenlabs.baseUrl": { label: "ElevenLabs Base URL", advanced: true },
     publicUrl: { label: "Public Webhook URL", advanced: true },
     skipSignatureVerification: {
       label: "Skip Signature Verification",
@@ -161,6 +178,7 @@ const voiceCallPlugin = {
         runtimePromise = createVoiceCallRuntime({
           config: cfg,
           coreConfig: api.config as CoreConfig,
+          ttsRuntime: api.runtime.tts,
           logger: api.logger,
         });
       }

extensions/voice-call/src/config.ts

@@ -82,31 +82,82 @@ export const SttConfigSchema = z
   .default({ provider: "openai", model: "whisper-1" });
 export type SttConfig = z.infer<typeof SttConfigSchema>;
 
+export const TtsProviderSchema = z.enum(["openai", "elevenlabs", "edge"]);
+export const TtsModeSchema = z.enum(["final", "all"]);
+export const TtsAutoSchema = z.enum(["off", "always", "inbound", "tagged"]);
+
 export const TtsConfigSchema = z
   .object({
-    /** TTS provider (currently only OpenAI supported) */
-    provider: z.literal("openai").default("openai"),
-    /**
-     * TTS model to use:
-     * - gpt-4o-mini-tts: newest, supports instructions for tone/style control (recommended)
-     * - tts-1: lower latency
-     * - tts-1-hd: higher quality
-     */
-    model: z.string().min(1).default("gpt-4o-mini-tts"),
-    /**
-     * Voice ID. For best quality, use marin or cedar.
-     * All voices: alloy, ash, ballad, coral, echo, fable, nova, onyx, sage, shimmer, verse, marin, cedar
-     */
-    voice: z.string().min(1).default("coral"),
-    /**
-     * Instructions for speech style (only works with gpt-4o-mini-tts).
-     * Examples: "Speak in a cheerful tone", "Talk like a sympathetic customer service agent"
-     */
-    instructions: z.string().optional(),
+    auto: TtsAutoSchema.optional(),
+    enabled: z.boolean().optional(),
+    mode: TtsModeSchema.optional(),
+    provider: TtsProviderSchema.optional(),
+    summaryModel: z.string().optional(),
+    modelOverrides: z
+      .object({
+        enabled: z.boolean().optional(),
+        allowText: z.boolean().optional(),
+        allowProvider: z.boolean().optional(),
+        allowVoice: z.boolean().optional(),
+        allowModelId: z.boolean().optional(),
+        allowVoiceSettings: z.boolean().optional(),
+        allowNormalization: z.boolean().optional(),
+        allowSeed: z.boolean().optional(),
+      })
+      .strict()
+      .optional(),
+    elevenlabs: z
+      .object({
+        apiKey: z.string().optional(),
+        baseUrl: z.string().optional(),
+        voiceId: z.string().optional(),
+        modelId: z.string().optional(),
+        seed: z.number().int().min(0).max(4294967295).optional(),
+        applyTextNormalization: z.enum(["auto", "on", "off"]).optional(),
+        languageCode: z.string().optional(),
+        voiceSettings: z
+          .object({
+            stability: z.number().min(0).max(1).optional(),
+            similarityBoost: z.number().min(0).max(1).optional(),
+            style: z.number().min(0).max(1).optional(),
+            useSpeakerBoost: z.boolean().optional(),
+            speed: z.number().min(0.5).max(2).optional(),
+          })
+          .strict()
+          .optional(),
+      })
+      .strict()
+      .optional(),
+    openai: z
+      .object({
+        apiKey: z.string().optional(),
+        model: z.string().optional(),
+        voice: z.string().optional(),
+      })
+      .strict()
+      .optional(),
+    edge: z
+      .object({
+        enabled: z.boolean().optional(),
+        voice: z.string().optional(),
+        lang: z.string().optional(),
+        outputFormat: z.string().optional(),
+        pitch: z.string().optional(),
+        rate: z.string().optional(),
+        volume: z.string().optional(),
+        saveSubtitles: z.boolean().optional(),
+        proxy: z.string().optional(),
+        timeoutMs: z.number().int().min(1000).max(120000).optional(),
+      })
+      .strict()
+      .optional(),
+    prefsPath: z.string().optional(),
+    maxTextLength: z.number().int().min(1).optional(),
+    timeoutMs: z.number().int().min(1000).max(120000).optional(),
   })
   .strict()
-  .default({ provider: "openai", model: "gpt-4o-mini-tts", voice: "coral" });
-export type TtsConfig = z.infer<typeof TtsConfigSchema>;
+  .optional();
+export type VoiceCallTtsConfig = z.infer<typeof TtsConfigSchema>;
 
 // -----------------------------------------------------------------------------
 // Webhook Server Configuration
@@ -307,7 +358,7 @@ export const VoiceCallConfigSchema = z
   /** STT configuration */
   stt: SttConfigSchema,
 
-  /** TTS configuration */
+  /** TTS override (deep-merges with core messages.tts) */
   tts: TtsConfigSchema,
 
   /** Store path for call logs */

extensions/voice-call/src/core-bridge.ts

@@ -2,10 +2,16 @@ import fs from "node:fs";
 import path from "node:path";
 import { fileURLToPath, pathToFileURL } from "node:url";
 
+import type { VoiceCallTtsConfig } from "./config.js";
+
 export type CoreConfig = {
   session?: {
     store?: string;
   };
+  messages?: {
+    tts?: VoiceCallTtsConfig;
+  };
+  [key: string]: unknown;
 };
 
 type CoreAgentDeps = {

extensions/voice-call/src/manager.ts

@@ -143,7 +143,7 @@ export class CallManager {
       // For notify mode with a message, use inline TwiML with <Say>
       let inlineTwiml: string | undefined;
       if (mode === "notify" && initialMessage) {
-        const pollyVoice = mapVoiceToPolly(this.config.tts.voice);
+        const pollyVoice = mapVoiceToPolly(this.config.tts?.openai?.voice);
         inlineTwiml = this.generateNotifyTwiml(initialMessage, pollyVoice);
         console.log(
           `[voice-call] Using inline TwiML for notify mode (voice: ${pollyVoice})`,
@@ -210,11 +210,13 @@ export class CallManager {
       this.addTranscriptEntry(call, "bot", text);
 
       // Play TTS
+      const voice =
+        this.provider?.name === "twilio" ? this.config.tts?.openai?.voice : undefined;
       await this.provider.playTts({
         callId,
         providerCallId: call.providerCallId,
         text,
-        voice: this.config.tts.voice,
+        voice,
       });
 
       return { success: true };

extensions/voice-call/src/manager/outbound.ts

@@ -68,7 +68,7 @@ export async function initiateCall(
     // For notify mode with a message, use inline TwiML with <Say>.
     let inlineTwiml: string | undefined;
     if (mode === "notify" && initialMessage) {
-      const pollyVoice = mapVoiceToPolly(ctx.config.tts.voice);
+      const pollyVoice = mapVoiceToPolly(ctx.config.tts?.openai?.voice);
       inlineTwiml = generateNotifyTwiml(initialMessage, pollyVoice);
       console.log(`[voice-call] Using inline TwiML for notify mode (voice: ${pollyVoice})`);
     }
@@ -120,11 +120,13 @@ export async function speak(
 
     addTranscriptEntry(call, "bot", text);
 
+    const voice =
+      ctx.provider?.name === "twilio" ? ctx.config.tts?.openai?.voice : undefined;
     await ctx.provider.playTts({
       callId,
       providerCallId: call.providerCallId,
       text,
-      voice: ctx.config.tts.voice,
+      voice,
     });
 
     return { success: true };
@@ -244,4 +246,3 @@ export async function endCall(
     return { success: false, error: err instanceof Error ? err.message : String(err) };
   }
 }
-

extensions/voice-call/src/providers/twilio.ts

@@ -15,9 +15,9 @@ import type {
   WebhookVerificationResult,
 } from "../types.js";
 import { escapeXml, mapVoiceToPolly } from "../voice-mapping.js";
+import { chunkAudio } from "../telephony-audio.js";
+import type { TelephonyTtsProvider } from "../telephony-tts.js";
 import type { VoiceCallProvider } from "./base.js";
-import type { OpenAITTSProvider } from "./tts-openai.js";
-import { chunkAudio } from "./tts-openai.js";
 import { twilioApiRequest } from "./twilio/api.js";
 import { verifyTwilioProviderWebhook } from "./twilio/webhook.js";
 
@@ -53,8 +53,8 @@ export class TwilioProvider implements VoiceCallProvider {
   /** Current public webhook URL (set when tunnel starts or from config) */
   private currentPublicUrl: string | null = null;
 
-  /** Optional OpenAI TTS provider for streaming TTS */
-  private ttsProvider: OpenAITTSProvider | null = null;
+  /** Optional telephony TTS provider for streaming TTS */
+  private ttsProvider: TelephonyTtsProvider | null = null;
 
   /** Optional media stream handler for sending audio */
   private mediaStreamHandler: MediaStreamHandler | null = null;
@@ -119,7 +119,7 @@ export class TwilioProvider implements VoiceCallProvider {
     return this.currentPublicUrl;
   }
 
-  setTTSProvider(provider: OpenAITTSProvider): void {
+  setTTSProvider(provider: TelephonyTtsProvider): void {
     this.ttsProvider = provider;
   }
 
@@ -454,13 +454,13 @@ export class TwilioProvider implements VoiceCallProvider {
    * Play TTS audio via Twilio.
    *
    * Two modes:
-   * 1. OpenAI TTS + Media Streams: If TTS provider and media stream are available,
-   *    generates audio via OpenAI and streams it through WebSocket (preferred).
+   * 1. Core TTS + Media Streams: If TTS provider and media stream are available,
+   *    generates audio via core TTS and streams it through WebSocket (preferred).
    * 2. TwiML <Say>: Falls back to Twilio's native TTS with Polly voices.
    *    Note: This may not work on all Twilio accounts.
    */
   async playTts(input: PlayTtsInput): Promise<void> {
-    // Try OpenAI TTS via media stream first (if configured)
+    // Try telephony TTS via media stream first (if configured)
     const streamSid = this.callStreamMap.get(input.providerCallId);
     if (this.ttsProvider && this.mediaStreamHandler && streamSid) {
       try {
@@ -468,7 +468,7 @@ export class TwilioProvider implements VoiceCallProvider {
         return;
       } catch (err) {
         console.warn(
-          `[voice-call] OpenAI TTS failed, falling back to Twilio <Say>:`,
+          `[voice-call] Telephony TTS failed, falling back to Twilio <Say>:`,
           err instanceof Error ? err.message : err,
         );
         // Fall through to TwiML <Say> fallback
@@ -484,7 +484,7 @@ export class TwilioProvider implements VoiceCallProvider {
     }
 
     console.warn(
-      "[voice-call] Using TwiML <Say> fallback - OpenAI TTS not configured or media stream not active",
+      "[voice-call] Using TwiML <Say> fallback - telephony TTS not configured or media stream not active",
     );
 
     const pollyVoice = mapVoiceToPolly(input.voice);
@@ -502,8 +502,8 @@ export class TwilioProvider implements VoiceCallProvider {
   }
 
   /**
-   * Play TTS via OpenAI and Twilio Media Streams.
-   * Generates audio with OpenAI TTS, converts to mu-law, and streams via WebSocket.
+   * Play TTS via core TTS and Twilio Media Streams.
+   * Generates audio with core TTS, converts to mu-law, and streams via WebSocket.
    * Uses a jitter buffer to smooth out timing variations.
    */
   private async playTtsViaStream(
@@ -514,8 +514,8 @@ export class TwilioProvider implements VoiceCallProvider {
       throw new Error("TTS provider and media stream handler required");
     }
 
-    // Generate audio with OpenAI TTS (returns mu-law at 8kHz)
-    const muLawAudio = await this.ttsProvider.synthesizeForTwilio(text);
+    // Generate audio with core TTS (returns mu-law at 8kHz)
+    const muLawAudio = await this.ttsProvider.synthesizeForTelephony(text);
 
     // Stream audio in 20ms chunks (160 bytes at 8kHz mu-law)
     const CHUNK_SIZE = 160;

extensions/voice-call/src/runtime.ts

@@ -6,8 +6,9 @@ import type { VoiceCallProvider } from "./providers/base.js";
 import { MockProvider } from "./providers/mock.js";
 import { PlivoProvider } from "./providers/plivo.js";
 import { TelnyxProvider } from "./providers/telnyx.js";
-import { OpenAITTSProvider } from "./providers/tts-openai.js";
 import { TwilioProvider } from "./providers/twilio.js";
+import type { TelephonyTtsRuntime } from "./telephony-tts.js";
+import { createTelephonyTtsProvider } from "./telephony-tts.js";
 import { startTunnel, type TunnelResult } from "./tunnel.js";
 import {
   cleanupTailscaleExposure,
@@ -81,9 +82,10 @@ function resolveProvider(config: VoiceCallConfig): VoiceCallProvider {
 export async function createVoiceCallRuntime(params: {
   config: VoiceCallConfig;
   coreConfig: CoreConfig;
+  ttsRuntime?: TelephonyTtsRuntime;
   logger?: Logger;
 }): Promise<VoiceCallRuntime> {
-  const { config, coreConfig, logger } = params;
+  const { config, coreConfig, ttsRuntime, logger } = params;
   const log = logger ?? {
     info: console.log,
     warn: console.warn,
@@ -149,27 +151,24 @@ export async function createVoiceCallRuntime(params: {
 
   if (provider.name === "twilio" && config.streaming?.enabled) {
     const twilioProvider = provider as TwilioProvider;
-    const openaiApiKey =
-      config.streaming.openaiApiKey || process.env.OPENAI_API_KEY;
-    if (openaiApiKey) {
+    if (ttsRuntime?.textToSpeechTelephony) {
       try {
-        const ttsProvider = new OpenAITTSProvider({
-          apiKey: openaiApiKey,
-          voice: config.tts.voice,
-          model: config.tts.model,
-          instructions: config.tts.instructions,
+        const ttsProvider = createTelephonyTtsProvider({
+          coreConfig,
+          ttsOverride: config.tts,
+          runtime: ttsRuntime,
         });
         twilioProvider.setTTSProvider(ttsProvider);
-        log.info("[voice-call] OpenAI TTS provider configured");
+        log.info("[voice-call] Telephony TTS provider configured");
       } catch (err) {
         log.warn(
-          `[voice-call] Failed to initialize OpenAI TTS: ${
+          `[voice-call] Failed to initialize telephony TTS: ${
             err instanceof Error ? err.message : String(err)
           }`,
         );
       }
     } else {
-      log.warn("[voice-call] OpenAI TTS key missing; streaming TTS disabled");
+      log.warn("[voice-call] Telephony TTS unavailable; streaming TTS disabled");
     }
 
     const mediaHandler = webhookServer.getMediaStreamHandler();

extensions/voice-call/src/telephony-audio.ts

@@ -0,0 +1,88 @@
+const TELEPHONY_SAMPLE_RATE = 8000;
+
+function clamp16(value: number): number {
+  return Math.max(-32768, Math.min(32767, value));
+}
+
+/**
+ * Resample 16-bit PCM (little-endian mono) to 8kHz using linear interpolation.
+ */
+export function resamplePcmTo8k(input: Buffer, inputSampleRate: number): Buffer {
+  if (inputSampleRate === TELEPHONY_SAMPLE_RATE) return input;
+  const inputSamples = Math.floor(input.length / 2);
+  if (inputSamples === 0) return Buffer.alloc(0);
+
+  const ratio = inputSampleRate / TELEPHONY_SAMPLE_RATE;
+  const outputSamples = Math.floor(inputSamples / ratio);
+  const output = Buffer.alloc(outputSamples * 2);
+
+  for (let i = 0; i < outputSamples; i++) {
+    const srcPos = i * ratio;
+    const srcIndex = Math.floor(srcPos);
+    const frac = srcPos - srcIndex;
+
+    const s0 = input.readInt16LE(srcIndex * 2);
+    const s1Index = Math.min(srcIndex + 1, inputSamples - 1);
+    const s1 = input.readInt16LE(s1Index * 2);
+
+    const sample = Math.round(s0 + frac * (s1 - s0));
+    output.writeInt16LE(clamp16(sample), i * 2);
+  }
+
+  return output;
+}
+
+/**
+ * Convert 16-bit PCM to 8-bit mu-law (G.711).
+ */
+export function pcmToMulaw(pcm: Buffer): Buffer {
+  const samples = Math.floor(pcm.length / 2);
+  const mulaw = Buffer.alloc(samples);
+
+  for (let i = 0; i < samples; i++) {
+    const sample = pcm.readInt16LE(i * 2);
+    mulaw[i] = linearToMulaw(sample);
+  }
+
+  return mulaw;
+}
+
+export function convertPcmToMulaw8k(
+  pcm: Buffer,
+  inputSampleRate: number,
+): Buffer {
+  const pcm8k = resamplePcmTo8k(pcm, inputSampleRate);
+  return pcmToMulaw(pcm8k);
+}
+
+/**
+ * Chunk audio buffer into 20ms frames for streaming (8kHz mono mu-law).
+ */
+export function chunkAudio(
+  audio: Buffer,
+  chunkSize = 160,
+): Generator<Buffer, void, unknown> {
+  return (function* () {
+    for (let i = 0; i < audio.length; i += chunkSize) {
+      yield audio.subarray(i, Math.min(i + chunkSize, audio.length));
+    }
+  })();
+}
+
+function linearToMulaw(sample: number): number {
+  const BIAS = 132;
+  const CLIP = 32635;
+
+  const sign = sample < 0 ? 0x80 : 0;
+  if (sample < 0) sample = -sample;
+  if (sample > CLIP) sample = CLIP;
+
+  sample += BIAS;
+  let exponent = 7;
+  for (let expMask = 0x4000; (sample & expMask) === 0 && exponent > 0; exponent--) {
+    expMask >>= 1;
+  }
+
+  const mantissa = (sample >> (exponent + 3)) & 0x0f;
+  return ~(sign | (exponent << 4) | mantissa) & 0xff;
+}

extensions/voice-call/src/telephony-tts.ts

@@ -0,0 +1,95 @@
+import type { CoreConfig } from "./core-bridge.js";
+import type { VoiceCallTtsConfig } from "./config.js";
+import { convertPcmToMulaw8k } from "./telephony-audio.js";
+
+export type TelephonyTtsRuntime = {
+  textToSpeechTelephony: (params: {
+    text: string;
+    cfg: CoreConfig;
+    prefsPath?: string;
+  }) => Promise<{
+    success: boolean;
+    audioBuffer?: Buffer;
+    sampleRate?: number;
+    provider?: string;
+    error?: string;
+  }>;
+};
+
+export type TelephonyTtsProvider = {
+  synthesizeForTelephony: (text: string) => Promise<Buffer>;
+};
+
+export function createTelephonyTtsProvider(params: {
+  coreConfig: CoreConfig;
+  ttsOverride?: VoiceCallTtsConfig;
+  runtime: TelephonyTtsRuntime;
+}): TelephonyTtsProvider {
+  const { coreConfig, ttsOverride, runtime } = params;
+  const mergedConfig = applyTtsOverride(coreConfig, ttsOverride);
+
+  return {
+    synthesizeForTelephony: async (text: string) => {
+      const result = await runtime.textToSpeechTelephony({
+        text,
+        cfg: mergedConfig,
+      });
+
+      if (!result.success || !result.audioBuffer || !result.sampleRate) {
+        throw new Error(result.error ?? "TTS conversion failed");
+      }
+
+      return convertPcmToMulaw8k(result.audioBuffer, result.sampleRate);
+    },
+  };
+}
+
+function applyTtsOverride(
+  coreConfig: CoreConfig,
+  override?: VoiceCallTtsConfig,
+): CoreConfig {
+  if (!override) return coreConfig;
+
+  const base = coreConfig.messages?.tts;
+  const merged = mergeTtsConfig(base, override);
+  if (!merged) return coreConfig;
+
+  return {
+    ...coreConfig,
+    messages: {
+      ...(coreConfig.messages ?? {}),
+      tts: merged,
+    },
+  };
+}
+
+function mergeTtsConfig(
+  base?: VoiceCallTtsConfig,
+  override?: VoiceCallTtsConfig,
+): VoiceCallTtsConfig | undefined {
+  if (!base && !override) return undefined;
+  if (!override) return base;
+  if (!base) return override;
+  return deepMerge(base, override);
+}
+
+function deepMerge<T>(base: T, override: T): T {
+  if (!isPlainObject(base) || !isPlainObject(override)) {
+    return override;
+  }
+  const result: Record<string, unknown> = { ...base };
+  for (const [key, value] of Object.entries(override)) {
+    if (value === undefined) continue;
+    const existing = (base as Record<string, unknown>)[key];
+    if (isPlainObject(existing) && isPlainObject(value)) {
+      result[key] = deepMerge(existing, value);
+    } else {
+      result[key] = value;
+    }
+  }
+  return result as T;
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  return Boolean(value) && typeof value === "object" && !Array.isArray(value);
+}

src/agents/bash-tools.exec.ts

@@ -1,5 +1,5 @@
 import crypto from "node:crypto";
-import { spawn, type ChildProcessWithoutNullStreams } from "node:child_process";
+import type { ChildProcessWithoutNullStreams } from "node:child_process";
 import path from "node:path";
 import type { AgentTool, AgentToolResult } from "@mariozechner/pi-agent-core";
 import { Type } from "@sinclair/typebox";
@@ -27,6 +27,7 @@ import {
 } from "../infra/shell-env.js";
 import { enqueueSystemEvent } from "../infra/system-events.js";
 import { logInfo, logWarn } from "../logger.js";
+import { formatSpawnError, spawnWithFallback } from "../process/spawn-utils.js";
 import {
   type ProcessSession,
   type SessionStdin,
@@ -362,23 +363,38 @@ async function runExecProcess(opts: {
   let stdin: SessionStdin | undefined;
 
   if (opts.sandbox) {
-    child = spawn(
-      "docker",
-      buildDockerExecArgs({
-        containerName: opts.sandbox.containerName,
-        command: opts.command,
-        workdir: opts.containerWorkdir ?? opts.sandbox.containerWorkdir,
-        env: opts.env,
-        tty: opts.usePty,
-      }),
-      {
+    const { child: spawned } = await spawnWithFallback({
+      argv: [
+        "docker",
+        ...buildDockerExecArgs({
+          containerName: opts.sandbox.containerName,
+          command: opts.command,
+          workdir: opts.containerWorkdir ?? opts.sandbox.containerWorkdir,
+          env: opts.env,
+          tty: opts.usePty,
+        }),
+      ],
+      options: {
         cwd: opts.workdir,
         env: process.env,
         detached: process.platform !== "win32",
         stdio: ["pipe", "pipe", "pipe"],
         windowsHide: true,
       },
-    ) as ChildProcessWithoutNullStreams;
+      fallbacks: [
+        {
+          label: "no-detach",
+          options: { detached: false },
+        },
+      ],
+      onFallback: (err, fallback) => {
+        const errText = formatSpawnError(err);
+        const warning = `Warning: spawn failed (${errText}); retrying with ${fallback.label}.`;
+        logWarn(`exec: spawn failed (${errText}); retrying with ${fallback.label}.`);
+        opts.warnings.push(warning);
+      },
+    });
+    child = spawned as ChildProcessWithoutNullStreams;
     stdin = child.stdin;
   } else if (opts.usePty) {
     const { shell, args: shellArgs } = getShellConfig();
@@ -422,24 +438,56 @@ async function runExecProcess(opts: {
       const warning = `Warning: PTY spawn failed (${errText}); retrying without PTY for \`${opts.command}\`.`;
       logWarn(`exec: PTY spawn failed (${errText}); retrying without PTY for "${opts.command}".`);
       opts.warnings.push(warning);
-      child = spawn(shell, [...shellArgs, opts.command], {
+      const { child: spawned } = await spawnWithFallback({
+        argv: [shell, ...shellArgs, opts.command],
+        options: {
+          cwd: opts.workdir,
+          env: opts.env,
+          detached: process.platform !== "win32",
+          stdio: ["pipe", "pipe", "pipe"],
+          windowsHide: true,
+        },
+        fallbacks: [
+          {
+            label: "no-detach",
+            options: { detached: false },
+          },
+        ],
+        onFallback: (fallbackErr, fallback) => {
+          const fallbackText = formatSpawnError(fallbackErr);
+          const fallbackWarning = `Warning: spawn failed (${fallbackText}); retrying with ${fallback.label}.`;
+          logWarn(`exec: spawn failed (${fallbackText}); retrying with ${fallback.label}.`);
+          opts.warnings.push(fallbackWarning);
+        },
+      });
+      child = spawned as ChildProcessWithoutNullStreams;
+      stdin = child.stdin;
+    }
+  } else {
+    const { shell, args: shellArgs } = getShellConfig();
+    const { child: spawned } = await spawnWithFallback({
+      argv: [shell, ...shellArgs, opts.command],
+      options: {
         cwd: opts.workdir,
         env: opts.env,
         detached: process.platform !== "win32",
         stdio: ["pipe", "pipe", "pipe"],
         windowsHide: true,
-      }) as ChildProcessWithoutNullStreams;
-      stdin = child.stdin;
-    }
-  } else {
-    const { shell, args: shellArgs } = getShellConfig();
-    child = spawn(shell, [...shellArgs, opts.command], {
-      cwd: opts.workdir,
-      env: opts.env,
-      detached: process.platform !== "win32",
-      stdio: ["pipe", "pipe", "pipe"],
-      windowsHide: true,
-    }) as ChildProcessWithoutNullStreams;
+      },
+      fallbacks: [
+        {
+          label: "no-detach",
+          options: { detached: false },
+        },
+      ],
+      onFallback: (err, fallback) => {
+        const errText = formatSpawnError(err);
+        const warning = `Warning: spawn failed (${errText}); retrying with ${fallback.label}.`;
+        logWarn(`exec: spawn failed (${errText}); retrying with ${fallback.label}.`);
+        opts.warnings.push(warning);
+      },
+    });
+    child = spawned as ChildProcessWithoutNullStreams;
     stdin = child.stdin;
   }
 

src/auto-reply/model.test.ts

@@ -10,11 +10,17 @@ describe("extractModelDirective", () => {
       expect(result.cleaned).toBe("");
     });
 
-    it("extracts /models with argument", () => {
+    it("does not treat /models as a /model directive", () => {
       const result = extractModelDirective("/models gpt-5");
-      expect(result.hasDirective).toBe(true);
-      expect(result.rawModel).toBe("gpt-5");
-      expect(result.cleaned).toBe("");
+      expect(result.hasDirective).toBe(false);
+      expect(result.rawModel).toBeUndefined();
+      expect(result.cleaned).toBe("/models gpt-5");
+    });
+
+    it("does not parse /models as a /model directive (no args)", () => {
+      const result = extractModelDirective("/models");
+      expect(result.hasDirective).toBe(false);
+      expect(result.cleaned).toBe("/models");
     });
 
     it("extracts /model with provider/model format", () => {

src/auto-reply/model.ts

@@ -14,7 +14,7 @@ export function extractModelDirective(
   if (!body) return { cleaned: "", hasDirective: false };
 
   const modelMatch = body.match(
-    /(?:^|\s)\/models?(?=$|\s|:)\s*:?\s*([A-Za-z0-9_.:@-]+(?:\/[A-Za-z0-9_.:@-]+)*)?/i,
+    /(?:^|\s)\/model(?=$|\s|:)\s*:?\s*([A-Za-z0-9_.:@-]+(?:\/[A-Za-z0-9_.:@-]+)*)?/i,
   );
 
   const aliases = (options?.aliases ?? []).map((alias) => alias.trim()).filter(Boolean);

src/config/paths.ts

@@ -59,6 +59,17 @@ export const CONFIG_PATH_CLAWDBOT = resolveConfigPath();
 
 export const DEFAULT_GATEWAY_PORT = 18789;
 
+/**
+ * Gateway lock directory (ephemeral).
+ * Default: os.tmpdir()/clawdbot-<uid> (uid suffix when available).
+ */
+export function resolveGatewayLockDir(tmpdir: () => string = os.tmpdir): string {
+  const base = tmpdir();
+  const uid = typeof process.getuid === "function" ? process.getuid() : undefined;
+  const suffix = uid != null ? `clawdbot-${uid}` : "clawdbot";
+  return path.join(base, suffix);
+}
+
 const OAUTH_FILENAME = "oauth.json";
 
 /**

src/infra/gateway-lock.test.ts

@@ -7,12 +7,13 @@ import path from "node:path";
 import { describe, expect, it, vi } from "vitest";
 
 import { acquireGatewayLock, GatewayLockError } from "./gateway-lock.js";
-import { resolveConfigPath, resolveStateDir } from "../config/paths.js";
+import { resolveConfigPath, resolveGatewayLockDir, resolveStateDir } from "../config/paths.js";
 
 async function makeEnv() {
   const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gateway-lock-"));
   const configPath = path.join(dir, "clawdbot.json");
   await fs.writeFile(configPath, "{}", "utf8");
+  await fs.mkdir(resolveGatewayLockDir(), { recursive: true });
   return {
     env: {
       ...process.env,
@@ -29,7 +30,8 @@ function resolveLockPath(env: NodeJS.ProcessEnv) {
   const stateDir = resolveStateDir(env);
   const configPath = resolveConfigPath(env, stateDir);
   const hash = createHash("sha1").update(configPath).digest("hex").slice(0, 8);
-  return { lockPath: path.join(stateDir, `gateway.${hash}.lock`), configPath };
+  const lockDir = resolveGatewayLockDir();
+  return { lockPath: path.join(lockDir, `gateway.${hash}.lock`), configPath };
 }
 
 function makeProcStat(pid: number, startTime: number) {

src/infra/gateway-lock.ts

@@ -3,7 +3,7 @@ import fs from "node:fs/promises";
 import fsSync from "node:fs";
 import path from "node:path";
 
-import { resolveConfigPath, resolveStateDir } from "../config/paths.js";
+import { resolveConfigPath, resolveGatewayLockDir, resolveStateDir } from "../config/paths.js";
 
 const DEFAULT_TIMEOUT_MS = 5000;
 const DEFAULT_POLL_INTERVAL_MS = 100;
@@ -150,7 +150,8 @@ function resolveGatewayLockPath(env: NodeJS.ProcessEnv) {
   const stateDir = resolveStateDir(env);
   const configPath = resolveConfigPath(env, stateDir);
   const hash = createHash("sha1").update(configPath).digest("hex").slice(0, 8);
-  const lockPath = path.join(stateDir, `gateway.${hash}.lock`);
+  const lockDir = resolveGatewayLockDir();
+  const lockPath = path.join(lockDir, `gateway.${hash}.lock`);
   return { lockPath, configPath };
 }
 

src/plugins/runtime/index.ts

@@ -124,6 +124,7 @@ import { startWebLoginWithQr, waitForWebLogin } from "../../web/login-qr.js";
 import { sendMessageWhatsApp, sendPollWhatsApp } from "../../web/outbound.js";
 import { registerMemoryCli } from "../../cli/memory-cli.js";
 import { formatNativeDependencyHint } from "./native-deps.js";
+import { textToSpeechTelephony } from "../../tts/tts.js";
 
 import type { PluginRuntime } from "./types.js";
 
@@ -162,6 +163,9 @@ export function createPluginRuntime(): PluginRuntime {
       getImageMetadata,
       resizeToJpeg,
     },
+    tts: {
+      textToSpeechTelephony,
+    },
     tools: {
       createMemoryGetTool,
       createMemorySearchTool,

src/plugins/runtime/types.ts

@@ -16,6 +16,7 @@ type UpsertChannelPairingRequest =
   typeof import("../../pairing/pairing-store.js").upsertChannelPairingRequest;
 type FetchRemoteMedia = typeof import("../../media/fetch.js").fetchRemoteMedia;
 type SaveMediaBuffer = typeof import("../../media/store.js").saveMediaBuffer;
+type TextToSpeechTelephony = typeof import("../../tts/tts.js").textToSpeechTelephony;
 type BuildMentionRegexes = typeof import("../../auto-reply/reply/mentions.js").buildMentionRegexes;
 type MatchesMentionPatterns =
   typeof import("../../auto-reply/reply/mentions.js").matchesMentionPatterns;
@@ -173,6 +174,9 @@ export type PluginRuntime = {
     getImageMetadata: GetImageMetadata;
     resizeToJpeg: ResizeToJpeg;
   };
+  tts: {
+    textToSpeechTelephony: TextToSpeechTelephony;
+  };
   tools: {
     createMemoryGetTool: CreateMemoryGetTool;
     createMemorySearchTool: CreateMemorySearchTool;

src/plugins/voice-call.plugin.test.ts

@@ -43,6 +43,7 @@ function setup(config: Record<string, unknown>): Registered {
     source: "test",
     config: {},
     pluginConfig: config,
+    runtime: { tts: { textToSpeechTelephony: vi.fn() } },
     logger: noopLogger,
     registerGatewayMethod: (method, handler) => methods.set(method, handler),
     registerTool: (tool) => tools.push(tool),
@@ -142,6 +143,7 @@ describe("voice-call plugin", () => {
       source: "test",
       config: {},
       pluginConfig: { provider: "mock" },
+      runtime: { tts: { textToSpeechTelephony: vi.fn() } },
       logger: noopLogger,
       registerGatewayMethod: () => {},
       registerTool: () => {},

src/process/exec.ts

@@ -4,6 +4,7 @@ import { promisify } from "node:util";
 
 import { danger, shouldLogVerbose } from "../globals.js";
 import { logDebug, logError } from "../logger.js";
+import { resolveCommandStdio } from "./spawn-utils.js";
 
 const execFileAsync = promisify(execFile);
 
@@ -78,19 +79,22 @@ export async function runCommandWithTimeout(
     if (resolvedEnv.npm_config_fund == null) resolvedEnv.npm_config_fund = "false";
   }
 
+  const stdio = resolveCommandStdio({ hasInput, preferInherit: true });
+  const child = spawn(argv[0], argv.slice(1), {
+    stdio,
+    cwd,
+    env: resolvedEnv,
+    windowsVerbatimArguments,
+  });
   // Spawn with inherited stdin (TTY) so tools like `pi` stay interactive when needed.
   return await new Promise((resolve, reject) => {
-    const child = spawn(argv[0], argv.slice(1), {
-      stdio: [hasInput ? "pipe" : "inherit", "pipe", "pipe"],
-      cwd,
-      env: resolvedEnv,
-      windowsVerbatimArguments,
-    });
     let stdout = "";
     let stderr = "";
     let settled = false;
     const timer = setTimeout(() => {
-      child.kill("SIGKILL");
+      if (typeof child.kill === "function") {
+        child.kill("SIGKILL");
+      }
     }, timeoutMs);
 
     if (hasInput && child.stdin) {

src/process/spawn-utils.test.ts

@@ -0,0 +1,64 @@
+import { EventEmitter } from "node:events";
+import { PassThrough } from "node:stream";
+import type { ChildProcess } from "node:child_process";
+import { describe, expect, it, vi } from "vitest";
+
+import { spawnWithFallback } from "./spawn-utils.js";
+
+function createStubChild() {
+  const child = new EventEmitter() as ChildProcess;
+  child.stdin = new PassThrough() as ChildProcess["stdin"];
+  child.stdout = new PassThrough() as ChildProcess["stdout"];
+  child.stderr = new PassThrough() as ChildProcess["stderr"];
+  child.pid = 1234;
+  child.killed = false;
+  child.kill = vi.fn(() => true) as ChildProcess["kill"];
+  queueMicrotask(() => {
+    child.emit("spawn");
+  });
+  return child;
+}
+
+describe("spawnWithFallback", () => {
+  it("retries on EBADF using fallback options", async () => {
+    const spawnMock = vi
+      .fn()
+      .mockImplementationOnce(() => {
+        const err = new Error("spawn EBADF");
+        (err as NodeJS.ErrnoException).code = "EBADF";
+        throw err;
+      })
+      .mockImplementationOnce(() => createStubChild());
+
+    const result = await spawnWithFallback({
+      argv: ["echo", "ok"],
+      options: { stdio: ["pipe", "pipe", "pipe"] },
+      fallbacks: [{ label: "safe-stdin", options: { stdio: ["ignore", "pipe", "pipe"] } }],
+      spawnImpl: spawnMock,
+    });
+
+    expect(result.usedFallback).toBe(true);
+    expect(result.fallbackLabel).toBe("safe-stdin");
+    expect(spawnMock).toHaveBeenCalledTimes(2);
+    expect(spawnMock.mock.calls[0]?.[2]?.stdio).toEqual(["pipe", "pipe", "pipe"]);
+    expect(spawnMock.mock.calls[1]?.[2]?.stdio).toEqual(["ignore", "pipe", "pipe"]);
+  });
+
+  it("does not retry on non-EBADF errors", async () => {
+    const spawnMock = vi.fn().mockImplementationOnce(() => {
+      const err = new Error("spawn ENOENT");
+      (err as NodeJS.ErrnoException).code = "ENOENT";
+      throw err;
+    });
+
+    await expect(
+      spawnWithFallback({
+        argv: ["missing"],
+        options: { stdio: ["pipe", "pipe", "pipe"] },
+        fallbacks: [{ label: "safe-stdin", options: { stdio: ["ignore", "pipe", "pipe"] } }],
+        spawnImpl: spawnMock,
+      }),
+    ).rejects.toThrow(/ENOENT/);
+    expect(spawnMock).toHaveBeenCalledTimes(1);
+  });
+});

src/process/spawn-utils.ts

@@ -0,0 +1,127 @@
+import type { ChildProcess, SpawnOptions } from "node:child_process";
+import { spawn } from "node:child_process";
+
+export type SpawnFallback = {
+  label: string;
+  options: SpawnOptions;
+};
+
+export type SpawnWithFallbackResult = {
+  child: ChildProcess;
+  usedFallback: boolean;
+  fallbackLabel?: string;
+};
+
+type SpawnWithFallbackParams = {
+  argv: string[];
+  options: SpawnOptions;
+  fallbacks?: SpawnFallback[];
+  spawnImpl?: typeof spawn;
+  retryCodes?: string[];
+  onFallback?: (err: unknown, fallback: SpawnFallback) => void;
+};
+
+const DEFAULT_RETRY_CODES = ["EBADF"];
+
+export function resolveCommandStdio(params: {
+  hasInput: boolean;
+  preferInherit: boolean;
+}): ["pipe" | "inherit" | "ignore", "pipe", "pipe"] {
+  const stdin = params.hasInput ? "pipe" : params.preferInherit ? "inherit" : "pipe";
+  return [stdin, "pipe", "pipe"];
+}
+
+export function formatSpawnError(err: unknown): string {
+  if (!(err instanceof Error)) return String(err);
+  const details = err as NodeJS.ErrnoException;
+  const parts: string[] = [];
+  const message = err.message?.trim();
+  if (message) parts.push(message);
+  if (details.code && !message?.includes(details.code)) parts.push(details.code);
+  if (details.syscall) parts.push(`syscall=${details.syscall}`);
+  if (typeof details.errno === "number") parts.push(`errno=${details.errno}`);
+  return parts.join(" ");
+}
+
+function shouldRetry(err: unknown, codes: string[]): boolean {
+  const code =
+    err && typeof err === "object" && "code" in err ? String((err as { code?: unknown }).code) : "";
+  return code.length > 0 && codes.includes(code);
+}
+
+async function spawnAndWaitForSpawn(
+  spawnImpl: typeof spawn,
+  argv: string[],
+  options: SpawnOptions,
+): Promise<ChildProcess> {
+  const child = spawnImpl(argv[0], argv.slice(1), options);
+
+  return await new Promise((resolve, reject) => {
+    let settled = false;
+    const cleanup = () => {
+      child.removeListener("error", onError);
+      child.removeListener("spawn", onSpawn);
+    };
+    const finishResolve = () => {
+      if (settled) return;
+      settled = true;
+      cleanup();
+      resolve(child);
+    };
+    const onError = (err: unknown) => {
+      if (settled) return;
+      settled = true;
+      cleanup();
+      reject(err);
+    };
+    const onSpawn = () => {
+      finishResolve();
+    };
+    child.once("error", onError);
+    child.once("spawn", onSpawn);
+    // Ensure mocked spawns that never emit "spawn" don't stall.
+    process.nextTick(() => {
+      if (typeof child.pid === "number") {
+        finishResolve();
+      }
+    });
+  });
+}
+
+export async function spawnWithFallback(
+  params: SpawnWithFallbackParams,
+): Promise<SpawnWithFallbackResult> {
+  const spawnImpl = params.spawnImpl ?? spawn;
+  const retryCodes = params.retryCodes ?? DEFAULT_RETRY_CODES;
+  const baseOptions = { ...params.options };
+  const fallbacks = params.fallbacks ?? [];
+  const attempts: Array<{ label?: string; options: SpawnOptions }> = [
+    { options: baseOptions },
+    ...fallbacks.map((fallback) => ({
+      label: fallback.label,
+      options: { ...baseOptions, ...fallback.options },
+    })),
+  ];
+
+  let lastError: unknown;
+  for (let index = 0; index < attempts.length; index += 1) {
+    const attempt = attempts[index];
+    try {
+      const child = await spawnAndWaitForSpawn(spawnImpl, params.argv, attempt.options);
+      return {
+        child,
+        usedFallback: index > 0,
+        fallbackLabel: attempt.label,
+      };
+    } catch (err) {
+      lastError = err;
+      const nextFallback = fallbacks[index];
+      if (!nextFallback || !shouldRetry(err, retryCodes)) {
+        throw err;
+      }
+      params.onFallback?.(err, nextFallback);
+    }
+  }
+
+  throw lastError;
+}

src/tts/tts.test.ts

@@ -109,13 +109,13 @@ describe("tts", () => {
   });
 
   describe("isValidOpenAIModel", () => {
-    it("accepts gpt-4o-mini-tts model", () => {
+    it("accepts supported models", () => {
       expect(isValidOpenAIModel("gpt-4o-mini-tts")).toBe(true);
+      expect(isValidOpenAIModel("tts-1")).toBe(true);
+      expect(isValidOpenAIModel("tts-1-hd")).toBe(true);
     });
 
-    it("rejects other models", () => {
-      expect(isValidOpenAIModel("tts-1")).toBe(false);
-      expect(isValidOpenAIModel("tts-1-hd")).toBe(false);
+    it("rejects unsupported models", () => {
       expect(isValidOpenAIModel("invalid")).toBe(false);
       expect(isValidOpenAIModel("")).toBe(false);
       expect(isValidOpenAIModel("gpt-4")).toBe(false);
@@ -123,9 +123,11 @@ describe("tts", () => {
   });
 
   describe("OPENAI_TTS_MODELS", () => {
-    it("contains only gpt-4o-mini-tts", () => {
+    it("contains supported models", () => {
       expect(OPENAI_TTS_MODELS).toContain("gpt-4o-mini-tts");
-      expect(OPENAI_TTS_MODELS).toHaveLength(1);
+      expect(OPENAI_TTS_MODELS).toContain("tts-1");
+      expect(OPENAI_TTS_MODELS).toContain("tts-1-hd");
+      expect(OPENAI_TTS_MODELS).toHaveLength(3);
     });
 
     it("is a non-empty array", () => {

src/tts/tts.ts

@@ -76,6 +76,11 @@ const DEFAULT_OUTPUT = {
   voiceCompatible: false,
 };
 
+const TELEPHONY_OUTPUT = {
+  openai: { format: "pcm" as const, sampleRate: 24000 },
+  elevenlabs: { format: "pcm_22050", sampleRate: 22050 },
+};
+
 const TTS_AUTO_MODES = new Set<TtsAutoMode>(["off", "always", "inbound", "tagged"]);
 
 export type ResolvedTtsConfig = {
@@ -180,6 +185,16 @@ export type TtsResult = {
   voiceCompatible?: boolean;
 };
 
+export type TtsTelephonyResult = {
+  success: boolean;
+  audioBuffer?: Buffer;
+  error?: string;
+  latencyMs?: number;
+  provider?: string;
+  outputFormat?: string;
+  sampleRate?: number;
+};
+
 type TtsStatusEntry = {
   timestamp: number;
   success: boolean;
@@ -736,7 +751,17 @@ function parseTtsDirectives(
   };
 }
 
-export const OPENAI_TTS_MODELS = ["gpt-4o-mini-tts"] as const;
+export const OPENAI_TTS_MODELS = ["gpt-4o-mini-tts", "tts-1", "tts-1-hd"] as const;
+
+/**
+ * Custom OpenAI-compatible TTS endpoint.
+ * When set, model/voice validation is relaxed to allow non-OpenAI models.
+ * Example: OPENAI_TTS_BASE_URL=http://localhost:8880/v1
+ */
+const OPENAI_TTS_BASE_URL = (
+  process.env.OPENAI_TTS_BASE_URL?.trim() || "https://api.openai.com/v1"
+).replace(/\/+$/, "");
+const isCustomOpenAIEndpoint = OPENAI_TTS_BASE_URL !== "https://api.openai.com/v1";
 export const OPENAI_TTS_VOICES = [
   "alloy",
   "ash",
@@ -752,10 +777,14 @@ export const OPENAI_TTS_VOICES = [
 type OpenAiTtsVoice = (typeof OPENAI_TTS_VOICES)[number];
 
 function isValidOpenAIModel(model: string): boolean {
+  // Allow any model when using custom endpoint (e.g., Kokoro, LocalAI)
+  if (isCustomOpenAIEndpoint) return true;
   return OPENAI_TTS_MODELS.includes(model as (typeof OPENAI_TTS_MODELS)[number]);
 }
 
 function isValidOpenAIVoice(voice: string): voice is OpenAiTtsVoice {
+  // Allow any voice when using custom endpoint (e.g., Kokoro Chinese voices)
+  if (isCustomOpenAIEndpoint) return true;
   return OPENAI_TTS_VOICES.includes(voice as OpenAiTtsVoice);
 }
 
@@ -966,7 +995,7 @@ async function openaiTTS(params: {
   apiKey: string;
   model: string;
   voice: string;
-  responseFormat: "mp3" | "opus";
+  responseFormat: "mp3" | "opus" | "pcm";
   timeoutMs: number;
 }): Promise<Buffer> {
   const { text, apiKey, model, voice, responseFormat, timeoutMs } = params;
@@ -982,7 +1011,7 @@ async function openaiTTS(params: {
   const timeout = setTimeout(() => controller.abort(), timeoutMs);
 
   try {
-    const response = await fetch("https://api.openai.com/v1/audio/speech", {
+    const response = await fetch(`${OPENAI_TTS_BASE_URL}/audio/speech`, {
       method: "POST",
       headers: {
         Authorization: `Bearer ${apiKey}`,
@@ -1210,6 +1239,100 @@ export async function textToSpeech(params: {
   };
 }
 
+export async function textToSpeechTelephony(params: {
+  text: string;
+  cfg: ClawdbotConfig;
+  prefsPath?: string;
+}): Promise<TtsTelephonyResult> {
+  const config = resolveTtsConfig(params.cfg);
+  const prefsPath = params.prefsPath ?? resolveTtsPrefsPath(config);
+
+  if (params.text.length > config.maxTextLength) {
+    return {
+      success: false,
+      error: `Text too long (${params.text.length} chars, max ${config.maxTextLength})`,
+    };
+  }
+
+  const userProvider = getTtsProvider(config, prefsPath);
+  const providers = resolveTtsProviderOrder(userProvider);
+
+  let lastError: string | undefined;
+
+  for (const provider of providers) {
+    const providerStart = Date.now();
+    try {
+      if (provider === "edge") {
+        lastError = "edge: unsupported for telephony";
+        continue;
+      }
+
+      const apiKey = resolveTtsApiKey(config, provider);
+      if (!apiKey) {
+        lastError = `No API key for ${provider}`;
+        continue;
+      }
+
+      if (provider === "elevenlabs") {
+        const output = TELEPHONY_OUTPUT.elevenlabs;
+        const audioBuffer = await elevenLabsTTS({
+          text: params.text,
+          apiKey,
+          baseUrl: config.elevenlabs.baseUrl,
+          voiceId: config.elevenlabs.voiceId,
+          modelId: config.elevenlabs.modelId,
+          outputFormat: output.format,
+          seed: config.elevenlabs.seed,
+          applyTextNormalization: config.elevenlabs.applyTextNormalization,
+          languageCode: config.elevenlabs.languageCode,
+          voiceSettings: config.elevenlabs.voiceSettings,
+          timeoutMs: config.timeoutMs,
+        });
+
+        return {
+          success: true,
+          audioBuffer,
+          latencyMs: Date.now() - providerStart,
+          provider,
+          outputFormat: output.format,
+          sampleRate: output.sampleRate,
+        };
+      }
+
+      const output = TELEPHONY_OUTPUT.openai;
+      const audioBuffer = await openaiTTS({
+        text: params.text,
+        apiKey,
+        model: config.openai.model,
+        voice: config.openai.voice,
+        responseFormat: output.format,
+        timeoutMs: config.timeoutMs,
+      });
+
+      return {
+        success: true,
+        audioBuffer,
+        latencyMs: Date.now() - providerStart,
+        provider,
+        outputFormat: output.format,
+        sampleRate: output.sampleRate,
+      };
+    } catch (err) {
+      const error = err as Error;
+      if (error.name === "AbortError") {
+        lastError = `${provider}: request timed out`;
+      } else {
+        lastError = `${provider}: ${error.message}`;
+      }
+    }
+  }
+
+  return {
+    success: false,
+    error: `TTS conversion failed: ${lastError || "no providers available"}`,
+  };
+}
+
 export async function maybeApplyTtsToPayload(params: {
   payload: ReplyPayload;
   cfg: ClawdbotConfig;