feat(zcode-plugin-langfuse): add Langfuse observability plugin

.gitignore

@@ -8,3 +8,5 @@ __pycache__/
 mirror-failure.txt
 mirror-result.txt
 publish-failure.txt
+!plugins/zcode-plugin-langfuse/payload/dist/
+!plugins/zcode-plugin-langfuse/payload/dist/**

marketplace.json

@@ -532,6 +532,24 @@
         "cli",
         "oauth2"
       ]
+    },
+    {
+      "name": "zcode-plugin-langfuse",
+      "source": "./plugins/zcode-plugin-langfuse",
+      "description": "Fail-open Langfuse tracing for ZCode sessions, prompts, tool calls, and assistant responses.",
+      "description_i18n": {
+        "en": "Fail-open Langfuse tracing for ZCode sessions, prompts, tool calls, and assistant responses.",
+        "zh-CN": "为 ZCode 会话、提示词、工具调用和助手回复提供 fail-open 的 Langfuse 追踪。"
+      },
+      "version": "0.2.3",
+      "category": "developer-tools",
+      "tags": [
+        "langfuse",
+        "tracing",
+        "telemetry",
+        "hooks"
+      ],
+      "strict": true
     }
   ]
 }

plugins/zcode-plugin-langfuse/.claude-plugin/plugin.json

@@ -0,0 +1,83 @@
+{
+  "name": "zcode-plugin-langfuse",
+  "description": "Fail-open Langfuse tracing for ZCode sessions, prompts, tool calls, and assistant responses.",
+  "description_i18n": {
+    "en": "Fail-open Langfuse tracing for ZCode sessions, prompts, tool calls, and assistant responses.",
+    "zh-CN": "为 ZCode 会话、提示词、工具调用和助手回复提供 fail-open 的 Langfuse 追踪。"
+  },
+  "version": "0.2.3",
+  "author": {
+    "name": "Community contributor"
+  },
+  "license": "MIT",
+  "keywords": [
+    "langfuse",
+    "observability",
+    "tracing",
+    "telemetry",
+    "hooks"
+  ],
+  "userConfig": {
+    "langfuse_public_key": {
+      "title": "Langfuse public key",
+      "description": "Langfuse project public key. You can also provide LANGFUSE_PUBLIC_KEY in the ZCode process environment.",
+      "type": "string",
+      "required": false
+    },
+    "langfuse_secret_key": {
+      "title": "Langfuse secret key",
+      "description": "Langfuse project secret key. It is used only by the local hook process and is never written to hook output.",
+      "type": "string",
+      "required": false,
+      "sensitive": true
+    },
+    "langfuse_base_url": {
+      "title": "Langfuse base URL",
+      "description": "HTTPS Langfuse host, for example https://cloud.langfuse.com or a self-hosted HTTPS URL. Plain HTTP is rejected.",
+      "type": "string",
+      "default": "https://cloud.langfuse.com"
+    },
+    "langfuse_user_id": {
+      "title": "Langfuse user ID",
+      "description": "Optional stable user identifier attached to traces. Leave empty to omit it.",
+      "type": "string",
+      "required": false
+    },
+    "langfuse_environment": {
+      "title": "Langfuse environment",
+      "description": "Environment label attached to traces.",
+      "type": "string",
+      "default": "development"
+    },
+    "capture_prompts": {
+      "title": "Capture prompts",
+      "description": "Include user prompts and assistant responses in Langfuse. Disable for metadata-only tracing.",
+      "type": "boolean",
+      "default": true
+    },
+    "capture_tool_inputs": {
+      "title": "Capture tool inputs",
+      "description": "Include tool names and inputs in Langfuse spans.",
+      "type": "boolean",
+      "default": true
+    },
+    "capture_tool_outputs": {
+      "title": "Capture tool outputs",
+      "description": "Include tool results and errors in Langfuse spans.",
+      "type": "boolean",
+      "default": true
+    },
+    "max_capture_chars": {
+      "title": "Maximum captured characters",
+      "description": "Maximum characters per captured prompt, tool payload, or response. Larger values are truncated.",
+      "type": "number",
+      "default": 20000
+    },
+    "debug": {
+      "title": "Debug diagnostics",
+      "description": "Write non-sensitive lifecycle diagnostics to stderr. Disabled by default.",
+      "type": "boolean",
+      "default": false
+    }
+  }
+}

plugins/zcode-plugin-langfuse/.zcode-plugin/plugin.json

@@ -0,0 +1,83 @@
+{
+  "name": "zcode-plugin-langfuse",
+  "description": "Fail-open Langfuse tracing for ZCode sessions, prompts, tool calls, and assistant responses.",
+  "description_i18n": {
+    "en": "Fail-open Langfuse tracing for ZCode sessions, prompts, tool calls, and assistant responses.",
+    "zh-CN": "为 ZCode 会话、提示词、工具调用和助手回复提供 fail-open 的 Langfuse 追踪。"
+  },
+  "version": "0.2.3",
+  "author": {
+    "name": "Community contributor"
+  },
+  "license": "MIT",
+  "keywords": [
+    "langfuse",
+    "observability",
+    "tracing",
+    "telemetry",
+    "hooks"
+  ],
+  "userConfig": {
+    "langfuse_public_key": {
+      "title": "Langfuse public key",
+      "description": "Langfuse project public key. You can also provide LANGFUSE_PUBLIC_KEY in the ZCode process environment.",
+      "type": "string",
+      "required": false
+    },
+    "langfuse_secret_key": {
+      "title": "Langfuse secret key",
+      "description": "Langfuse project secret key. It is used only by the local hook process and is never written to hook output.",
+      "type": "string",
+      "required": false,
+      "sensitive": true
+    },
+    "langfuse_base_url": {
+      "title": "Langfuse base URL",
+      "description": "HTTPS Langfuse host, for example https://cloud.langfuse.com or a self-hosted HTTPS URL. Plain HTTP is rejected.",
+      "type": "string",
+      "default": "https://cloud.langfuse.com"
+    },
+    "langfuse_user_id": {
+      "title": "Langfuse user ID",
+      "description": "Optional stable user identifier attached to traces. Leave empty to omit it.",
+      "type": "string",
+      "required": false
+    },
+    "langfuse_environment": {
+      "title": "Langfuse environment",
+      "description": "Environment label attached to traces.",
+      "type": "string",
+      "default": "development"
+    },
+    "capture_prompts": {
+      "title": "Capture prompts",
+      "description": "Include user prompts and assistant responses in Langfuse. Disable for metadata-only tracing.",
+      "type": "boolean",
+      "default": true
+    },
+    "capture_tool_inputs": {
+      "title": "Capture tool inputs",
+      "description": "Include tool names and inputs in Langfuse spans.",
+      "type": "boolean",
+      "default": true
+    },
+    "capture_tool_outputs": {
+      "title": "Capture tool outputs",
+      "description": "Include tool results and errors in Langfuse spans.",
+      "type": "boolean",
+      "default": true
+    },
+    "max_capture_chars": {
+      "title": "Maximum captured characters",
+      "description": "Maximum characters per captured prompt, tool payload, or response. Larger values are truncated.",
+      "type": "number",
+      "default": 20000
+    },
+    "debug": {
+      "title": "Debug diagnostics",
+      "description": "Write non-sensitive lifecycle diagnostics to stderr. Disabled by default.",
+      "type": "boolean",
+      "default": false
+    }
+  }
+}

plugins/zcode-plugin-langfuse/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Community contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.