diff --git a/agent/skills/config.py b/agent/skills/config.py
index 21e1737..86979c9 100644
--- a/agent/skills/config.py
+++ b/agent/skills/config.py
@@ -123,13 +123,18 @@ def should_include_skill(
                 return False
         
         # Check environment variables (API keys)
-        # Simple rule: All required env vars must be set
+        # All required env vars must be set
         required_env = metadata.requires.get('env', [])
         if required_env:
             for env_name in required_env:
                 if not has_env_var(env_name):
-                    # Missing required API key → disable skill
                     return False
+
+        # Check anyEnv (at least one must be present)
+        any_env = metadata.requires.get('anyEnv', [])
+        if any_env:
+            if not any(has_env_var(e) for e in any_env):
+                return False
     
     return True
 
diff --git a/agent/skills/formatter.py b/agent/skills/formatter.py
index 7426146..86abf1e 100644
--- a/agent/skills/formatter.py
+++ b/agent/skills/formatter.py
@@ -32,6 +32,7 @@ def format_skills_for_prompt(skills: List[Skill]) -> str:
         lines.append(f"    <name>{_escape_xml(skill.name)}</name>")
         lines.append(f"    <description>{_escape_xml(skill.description)}</description>")
         lines.append(f"    <location>{_escape_xml(skill.file_path)}</location>")
+        lines.append(f"    <base_dir>{_escape_xml(skill.base_dir)}</base_dir>")
         lines.append("  </skill>")
     
     lines.append("</available_skills>")
diff --git a/config.py b/config.py
index f50072e..81440e1 100644
--- a/config.py
+++ b/config.py
@@ -355,6 +355,37 @@ def load_config():
     logger.info("[INIT] Debug: {}".format(config.get("debug", False)))
     logger.info("[INIT] ========================================")
 
+    # Sync selected config values to environment variables so that
+    # subprocesses (e.g. shell skill scripts) can access them directly.
+    # Existing env vars are NOT overwritten (env takes precedence).
+    _CONFIG_TO_ENV = {
+        "open_ai_api_key": "OPENAI_API_KEY",
+        "open_ai_api_base": "OPENAI_API_BASE",
+        "linkai_api_key": "LINKAI_API_KEY",
+        "linkai_api_base": "LINKAI_API_BASE",
+        "claude_api_key": "CLAUDE_API_KEY",
+        "claude_api_base": "CLAUDE_API_BASE",
+        "gemini_api_key": "GEMINI_API_KEY",
+        "gemini_api_base": "GEMINI_API_BASE",
+        "minimax_api_key": "MINIMAX_API_KEY",
+        "minimax_api_base": "MINIMAX_API_BASE",
+        "zhipu_ai_api_key": "ZHIPU_AI_API_KEY",
+        "zhipu_ai_api_base": "ZHIPU_AI_API_BASE",
+        "moonshot_api_key": "MOONSHOT_API_KEY",
+        "moonshot_api_base": "MOONSHOT_API_BASE",
+        "ark_api_key": "ARK_API_KEY",
+        "ark_api_base": "ARK_API_BASE",
+    }
+    injected = 0
+    for conf_key, env_key in _CONFIG_TO_ENV.items():
+        if env_key not in os.environ:
+            val = config.get(conf_key, "")
+            if val:
+                os.environ[env_key] = str(val)
+                injected += 1
+    if injected:
+        logger.info("[INIT] Synced {} config values to environment variables".format(injected))
+
     config.load_user_datas()
 
 
diff --git a/skills/openai-image-vision/README.md b/skills/openai-image-vision/README.md
index 1db0f42..7f88c9c 100644
--- a/skills/openai-image-vision/README.md
+++ b/skills/openai-image-vision/README.md
@@ -72,8 +72,12 @@ bash scripts/vision.sh "image.jpg" "Analyze this" "gpt-4o-mini"
 
 | Variable | Required | Default | Description |
 |----------|----------|---------|-------------|
-| `OPENAI_API_KEY` | Yes | - | Your OpenAI API key |
-| `OPENAI_API_BASE` | No | `https://api.openai.com/v1` | Custom API base URL |
+| `OPENAI_API_KEY` | No* | - | OpenAI API key (preferred) |
+| `OPENAI_API_BASE` | No | `https://api.openai.com/v1` | Custom OpenAI API base URL |
+| `LINKAI_API_KEY` | No* | - | LinkAI API key (fallback when OPENAI_API_KEY is not set) |
+| `LINKAI_API_BASE` | No | `https://api.link-ai.tech` | LinkAI API base URL |
+
+\* At least one of `OPENAI_API_KEY` or `LINKAI_API_KEY` must be set. OpenAI takes priority when both are configured.
 
 ## Response Format
 
diff --git a/skills/openai-image-vision/SKILL.md b/skills/openai-image-vision/SKILL.md
index 5173b0c..dba5f99 100644
--- a/skills/openai-image-vision/SKILL.md
+++ b/skills/openai-image-vision/SKILL.md
@@ -6,8 +6,7 @@ metadata:
   emoji: 👁️
   requires:
     bins: ["curl", "base64"]
-    env: ["OPENAI_API_KEY"]
-  primaryEnv: "OPENAI_API_KEY"
+    anyEnv: ["OPENAI_API_KEY", "LINKAI_API_KEY"]
 ---
 
 # OpenAI Image Vision
@@ -16,12 +15,13 @@ Analyze images using OpenAI's GPT-4 Vision API. The model can understand visual
 
 ## Setup
 
-This skill requires an OpenAI API key. If not configured:
+This skill requires at least one of the following API keys (OpenAI is preferred when both are set):
 
-1. Get your API key from https://platform.openai.com/api-keys
-2. Set the key using: `env_config(action="set", key="OPENAI_API_KEY", value="your-key")`
+1. **OpenAI** (preferred): `env_config(action="set", key="OPENAI_API_KEY", value="your-key")`
+2. **LinkAI** (fallback): `env_config(action="set", key="LINKAI_API_KEY", value="your-key")`
+
+Optional: Set custom API base URL:
 
-Optional: Set custom API base URL (default: https://api.openai.com/v1):
 ```bash
 env_config(action="set", key="OPENAI_API_BASE", value="your-base-url")
 ```
diff --git a/skills/openai-image-vision/scripts/vision.sh b/skills/openai-image-vision/scripts/vision.sh
index c8294a1..e30e5e1 100755
--- a/skills/openai-image-vision/scripts/vision.sh
+++ b/skills/openai-image-vision/scripts/vision.sh
@@ -18,13 +18,21 @@ if [ -z "$question" ]; then
     exit 1
 fi
 
-if [ -z "${OPENAI_API_KEY:-}" ]; then
-    echo '{"error": "OPENAI_API_KEY environment variable is not set", "help": "Visit https://platform.openai.com/api-keys to get an API key"}'
+# Determine API key and base URL (prefer OpenAI, fallback to LinkAI)
+api_key="${OPENAI_API_KEY:-}"
+api_base="${OPENAI_API_BASE:-https://api.openai.com/v1}"
+
+if [ -z "$api_key" ] && [ -n "${LINKAI_API_KEY:-}" ]; then
+    api_key="$LINKAI_API_KEY"
+    api_base="${LINKAI_API_BASE:-https://api.link-ai.tech}/v1"
+    >&2 echo "[vision.sh] Using LinkAI API (OPENAI_API_KEY not set)"
+fi
+
+if [ -z "$api_key" ]; then
+    echo '{"error": "No API key configured. Set OPENAI_API_KEY or LINKAI_API_KEY", "help": "Visit https://platform.openai.com/api-keys or https://link-ai.tech to get an API key"}'
     exit 1
 fi
 
-# Set API base URL (default to OpenAI's official endpoint)
-api_base="${OPENAI_API_BASE:-https://api.openai.com/v1}"
 # Remove trailing slash if present
 api_base="${api_base%/}"
 
@@ -175,7 +183,7 @@ fi
 curl_cmd=$(command -v curl)
 response=$($curl_cmd -sS --max-time 60 \
     -X POST \
-    -H "Authorization: Bearer $OPENAI_API_KEY" \
+    -H "Authorization: Bearer $api_key" \
     -H "Content-Type: application/json" \
     -d "$request_body" \
     "$api_base/chat/completions" 2>&1)
diff --git a/skills/skill-creator/SKILL.md b/skills/skill-creator/SKILL.md
index 697f9f9..c037517 100644
--- a/skills/skill-creator/SKILL.md
+++ b/skills/skill-creator/SKILL.md
@@ -261,14 +261,15 @@ Write the YAML frontmatter with `name`, `description`, and optional `metadata`:
   - Example description for a `docx` skill: "Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. Use when the agent needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks"
 - `metadata`: (Optional) Specify requirements and configuration
   - `requires.bins`: Required binaries (e.g., `["curl", "jq"]`)
-  - `requires.env`: Required environment variables (e.g., `["OPENAI_API_KEY"]`)
-  - `primaryEnv`: Primary environment variable name (for API keys)
+  - `requires.env`: Required environment variables — all must be set (e.g., `["MYAPI_KEY"]`)
+  - `requires.anyEnv`: Alternative environment variables — at least one must be set (e.g., `["OPENAI_API_KEY", "LINKAI_API_KEY"]`)
+  - `requires.anyBins`: Alternative binaries — at least one must be present
   - `always`: Set to `true` to always load regardless of requirements
   - `emoji`: Skill icon (optional)
 
 **API Key Requirements**:
 
-If your skill needs an API key, declare it in metadata:
+If your skill needs a single API key, declare it in `requires.env`:
 
 ```yaml
 ---
@@ -278,7 +279,19 @@ metadata:
   requires:
     bins: ["curl"]
     env: ["MYAPI_KEY"]
-  primaryEnv: "MYAPI_KEY"
+---
+```
+
+If your skill supports multiple API key providers (e.g., OpenAI or LinkAI), use `requires.anyEnv`:
+
+```yaml
+---
+name: my-vision
+description: Analyze images using Vision API
+metadata:
+  requires:
+    bins: ["curl"]
+    anyEnv: ["OPENAI_API_KEY", "LINKAI_API_KEY"]
 ---
 ```