feat: add pinecone-rag skill for RAG pipelines and agent memory 🤖🤖🤖 (#1939)

* feat: add pinecone-rag skill for RAG pipelines and agent memory

* chore: remove backup file

* docs: update README.skills.md with pinecone-rag entry

docs/README.skills.md

@@ -266,6 +266,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
 | [phoenix-evals](../skills/phoenix-evals/SKILL.md)<br />`gh skills install github/awesome-copilot phoenix-evals` | Build and run evaluators for AI/LLM applications using Phoenix. | `references/axial-coding.md`<br />`references/common-mistakes-python.md`<br />`references/error-analysis-multi-turn.md`<br />`references/error-analysis.md`<br />`references/evaluate-dataframe-python.md`<br />`references/evaluators-code-python.md`<br />`references/evaluators-code-typescript.md`<br />`references/evaluators-custom-templates.md`<br />`references/evaluators-llm-python.md`<br />`references/evaluators-llm-typescript.md`<br />`references/evaluators-overview.md`<br />`references/evaluators-pre-built.md`<br />`references/evaluators-rag.md`<br />`references/experiments-datasets-python.md`<br />`references/experiments-datasets-typescript.md`<br />`references/experiments-overview.md`<br />`references/experiments-running-python.md`<br />`references/experiments-running-typescript.md`<br />`references/experiments-synthetic-python.md`<br />`references/experiments-synthetic-typescript.md`<br />`references/fundamentals-anti-patterns.md`<br />`references/fundamentals-model-selection.md`<br />`references/fundamentals.md`<br />`references/observe-sampling-python.md`<br />`references/observe-sampling-typescript.md`<br />`references/observe-tracing-setup.md`<br />`references/production-continuous.md`<br />`references/production-guardrails.md`<br />`references/production-overview.md`<br />`references/setup-python.md`<br />`references/setup-typescript.md`<br />`references/validation-evaluators-python.md`<br />`references/validation-evaluators-typescript.md`<br />`references/validation.md` |
 | [phoenix-tracing](../skills/phoenix-tracing/SKILL.md)<br />`gh skills install github/awesome-copilot phoenix-tracing` | OpenInference semantic conventions and instrumentation for Phoenix AI observability. Use when implementing LLM tracing, creating custom spans, or deploying to production. | `README.md`<br />`references/annotations-overview.md`<br />`references/annotations-python.md`<br />`references/annotations-typescript.md`<br />`references/fundamentals-flattening.md`<br />`references/fundamentals-overview.md`<br />`references/fundamentals-required-attributes.md`<br />`references/fundamentals-universal-attributes.md`<br />`references/instrumentation-auto-python.md`<br />`references/instrumentation-auto-typescript.md`<br />`references/instrumentation-manual-python.md`<br />`references/instrumentation-manual-typescript.md`<br />`references/metadata-python.md`<br />`references/metadata-typescript.md`<br />`references/production-python.md`<br />`references/production-typescript.md`<br />`references/projects-python.md`<br />`references/projects-typescript.md`<br />`references/sessions-python.md`<br />`references/sessions-typescript.md`<br />`references/setup-python.md`<br />`references/setup-typescript.md`<br />`references/span-agent.md`<br />`references/span-chain.md`<br />`references/span-embedding.md`<br />`references/span-evaluator.md`<br />`references/span-guardrail.md`<br />`references/span-llm.md`<br />`references/span-reranker.md`<br />`references/span-retriever.md`<br />`references/span-tool.md` |
 | [php-mcp-server-generator](../skills/php-mcp-server-generator/SKILL.md)<br />`gh skills install github/awesome-copilot php-mcp-server-generator` | Generate a complete PHP Model Context Protocol server project with tools, resources, prompts, and tests using the official PHP SDK | None |
+| [pinecone-rag](../skills/pinecone-rag/SKILL.md)<br />`gh skills install github/awesome-copilot pinecone-rag` | Build production RAG pipelines and persistent agent memory using Pinecone as the vector database backend. ALWAYS USE THIS SKILL when the user mentions Pinecone, wants to index documents for semantic search, build a retrieval-augmented generation system, store agent memory across sessions, implement hybrid search, or connect an LLM to a searchable knowledge base — even if they don't say "Pinecone" explicitly. Also use when the user asks about vector databases for RAG, namespace isolation for multi-tenant agents, embedding pipelines, or scaling a knowledge base beyond what local storage can handle. DO NOT use for local-only vector stores (Chroma, FAISS, pgvector) or pure keyword search with no semantic component. | None |
 | [planning-oracle-to-postgres-migration-integration-testing](../skills/planning-oracle-to-postgres-migration-integration-testing/SKILL.md)<br />`gh skills install github/awesome-copilot planning-oracle-to-postgres-migration-integration-testing` | Creates an integration testing plan for .NET data access artifacts during Oracle-to-PostgreSQL database migrations. Analyzes a single project to identify repositories, DAOs, and service layers that interact with the database, then produces a structured testing plan. Use when planning integration test coverage for a migrated project, identifying which data access methods need tests, or preparing for Oracle-to-PostgreSQL migration validation. | None |
 | [plantuml-ascii](../skills/plantuml-ascii/SKILL.md)<br />`gh skills install github/awesome-copilot plantuml-ascii` | Generate ASCII art diagrams using PlantUML text mode. Use when user asks to create ASCII diagrams, text-based diagrams, terminal-friendly diagrams, or mentions plantuml ascii, text diagram, ascii art diagram. Supports: Converting PlantUML diagrams to ASCII art, Creating sequence diagrams, class diagrams, flowcharts in ASCII format, Generating Unicode-enhanced ASCII art with -utxt flag | None |
 | [playwright-automation-fill-in-form](../skills/playwright-automation-fill-in-form/SKILL.md)<br />`gh skills install github/awesome-copilot playwright-automation-fill-in-form` | Automate filling in a form using Playwright MCP | None |