feat(03-07): add LangSmith and 6 vector DB providers

- LangSmith with lsv2_(pt|sk) high-confidence regex
- Pinecone with pcsk_ high-confidence regex
- Weaviate, Qdrant, Chroma, Milvus/Zilliz, Neon (keyword-only)
- Completes 15 Tier 6 emerging/niche providers (PROV-06)

pkg/providers/definitions/chroma.yaml

@@ -0,0 +1,17 @@
+format_version: 1
+name: chroma
+display_name: Chroma
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "chromadb"
+  - "chroma-client"
+  - "CHROMA_API_KEY"
+  - "CHROMA_HOST"
+  - "trychroma.com"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

pkg/providers/definitions/langsmith.yaml

@@ -0,0 +1,24 @@
+format_version: 1
+name: langsmith
+display_name: LangSmith (LangChain)
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "langsmith"
+  - "langchain"
+  - "LANGCHAIN_API_KEY"
+  - "LANGSMITH_API_KEY"
+  - "LANGCHAIN_TRACING_V2"
+  - "api.smith.langchain.com"
+  - "lsv2_"
+patterns:
+  - regex: 'lsv2_(pt|sk)_[a-f0-9]{32}_[a-f0-9]{10}'
+    entropy_min: 4.0
+    confidence: high
+verify:
+  method: GET
+  url: https://api.smith.langchain.com/info
+  headers:
+    X-API-Key: "{KEY}"
+  valid_status: [200]
+  invalid_status: [401, 403]

pkg/providers/definitions/milvus.yaml

@@ -0,0 +1,18 @@
+format_version: 1
+name: milvus
+display_name: Milvus / Zilliz
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "milvus"
+  - "zilliz"
+  - "ZILLIZ_API_KEY"
+  - "MILVUS_TOKEN"
+  - "zilliz.com"
+  - "api.cloud.zilliz.com"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

pkg/providers/definitions/neon.yaml

@@ -0,0 +1,19 @@
+format_version: 1
+name: neon
+display_name: Neon (Serverless Postgres + pgvector)
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "neon-db"
+  - "neondb"
+  - "NEON_API_KEY"
+  - "NEON_CONNECTION_STRING"
+  - "console.neon.tech"
+  - "pg.neon.tech"
+verify:
+  method: GET
+  url: https://console.neon.tech/api/v2/projects
+  headers:
+    Authorization: "Bearer {KEY}"
+  valid_status: [200]
+  invalid_status: [401, 403]

pkg/providers/definitions/pinecone.yaml

@@ -0,0 +1,23 @@
+format_version: 1
+name: pinecone
+display_name: Pinecone
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "pinecone"
+  - "PINECONE_API_KEY"
+  - "PINECONE_ENVIRONMENT"
+  - "api.pinecone.io"
+  - "pinecone.io"
+  - "pcsk_"
+patterns:
+  - regex: 'pcsk_[A-Za-z0-9]{40,}'
+    entropy_min: 4.0
+    confidence: high
+verify:
+  method: GET
+  url: https://api.pinecone.io/indexes
+  headers:
+    Api-Key: "{KEY}"
+  valid_status: [200]
+  invalid_status: [401, 403]

pkg/providers/definitions/qdrant.yaml

@@ -0,0 +1,17 @@
+format_version: 1
+name: qdrant
+display_name: Qdrant
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "qdrant"
+  - "QDRANT_API_KEY"
+  - "QDRANT_URL"
+  - "qdrant.tech"
+  - "cloud.qdrant.io"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

pkg/providers/definitions/weaviate.yaml

@@ -0,0 +1,17 @@
+format_version: 1
+name: weaviate
+display_name: Weaviate
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "weaviate"
+  - "WEAVIATE_API_KEY"
+  - "WEAVIATE_URL"
+  - "weaviate.io"
+  - "wcs.api"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

providers/chroma.yaml

@@ -0,0 +1,17 @@
+format_version: 1
+name: chroma
+display_name: Chroma
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "chromadb"
+  - "chroma-client"
+  - "CHROMA_API_KEY"
+  - "CHROMA_HOST"
+  - "trychroma.com"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

providers/langsmith.yaml

@@ -0,0 +1,24 @@
+format_version: 1
+name: langsmith
+display_name: LangSmith (LangChain)
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "langsmith"
+  - "langchain"
+  - "LANGCHAIN_API_KEY"
+  - "LANGSMITH_API_KEY"
+  - "LANGCHAIN_TRACING_V2"
+  - "api.smith.langchain.com"
+  - "lsv2_"
+patterns:
+  - regex: 'lsv2_(pt|sk)_[a-f0-9]{32}_[a-f0-9]{10}'
+    entropy_min: 4.0
+    confidence: high
+verify:
+  method: GET
+  url: https://api.smith.langchain.com/info
+  headers:
+    X-API-Key: "{KEY}"
+  valid_status: [200]
+  invalid_status: [401, 403]

providers/milvus.yaml

@@ -0,0 +1,18 @@
+format_version: 1
+name: milvus
+display_name: Milvus / Zilliz
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "milvus"
+  - "zilliz"
+  - "ZILLIZ_API_KEY"
+  - "MILVUS_TOKEN"
+  - "zilliz.com"
+  - "api.cloud.zilliz.com"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

providers/neon.yaml

@@ -0,0 +1,19 @@
+format_version: 1
+name: neon
+display_name: Neon (Serverless Postgres + pgvector)
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "neon-db"
+  - "neondb"
+  - "NEON_API_KEY"
+  - "NEON_CONNECTION_STRING"
+  - "console.neon.tech"
+  - "pg.neon.tech"
+verify:
+  method: GET
+  url: https://console.neon.tech/api/v2/projects
+  headers:
+    Authorization: "Bearer {KEY}"
+  valid_status: [200]
+  invalid_status: [401, 403]

providers/pinecone.yaml

@@ -0,0 +1,23 @@
+format_version: 1
+name: pinecone
+display_name: Pinecone
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "pinecone"
+  - "PINECONE_API_KEY"
+  - "PINECONE_ENVIRONMENT"
+  - "api.pinecone.io"
+  - "pinecone.io"
+  - "pcsk_"
+patterns:
+  - regex: 'pcsk_[A-Za-z0-9]{40,}'
+    entropy_min: 4.0
+    confidence: high
+verify:
+  method: GET
+  url: https://api.pinecone.io/indexes
+  headers:
+    Api-Key: "{KEY}"
+  valid_status: [200]
+  invalid_status: [401, 403]

providers/qdrant.yaml

@@ -0,0 +1,17 @@
+format_version: 1
+name: qdrant
+display_name: Qdrant
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "qdrant"
+  - "QDRANT_API_KEY"
+  - "QDRANT_URL"
+  - "qdrant.tech"
+  - "cloud.qdrant.io"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

providers/weaviate.yaml

@@ -0,0 +1,17 @@
+format_version: 1
+name: weaviate
+display_name: Weaviate
+tier: 6
+last_verified: "2026-04-05"
+keywords:
+  - "weaviate"
+  - "WEAVIATE_API_KEY"
+  - "WEAVIATE_URL"
+  - "weaviate.io"
+  - "wcs.api"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []