docs: Completely remove deprecated docs

.github/labeler.yml

@@ -1,6 +1,6 @@
 docs:
 - changed-files:
-  - any-glob-to-any-file: docs/*
+  - any-glob-to-any-file: docs-mintlify/**/*
 
 # Data source drivers
 data source driver:

.oxlintrc.json

@@ -17,7 +17,6 @@
     "coverage/",
     "gen/",
     "**/*.d.ts",
-    "docs/",
     "docs-mintlify/",
     "examples/",
     "rust/cubesql/",

CLAUDE.md

@@ -54,9 +54,8 @@ yarn test
 
 ### Documentation Development
 
-**IMPORTANT: `/docs-mintlify` is the active documentation site. `/docs` is the legacy
-docs site and is deprecated — do NOT add or edit content there.** When asked to write or
-update documentation, work in `/docs-mintlify` unless the user explicitly says otherwise.
+Documentation lives in `/docs-mintlify`. When asked to write or update documentation,
+work there unless the user explicitly says otherwise.
 
 ```bash
 cd docs-mintlify
@@ -82,8 +81,7 @@ yarn dev    # Start the Mintlify dev server
   - Database drivers: `cubejs-postgres-driver`, `cubejs-bigquery-driver`, etc.
   - API layer: `cubejs-api-gateway`
 - **`/rust`**: Rust components including CubeSQL (SQL interface) and CubeStore (distributed storage)
-- **`/docs-mintlify`**: Mintlify documentation site — **the active docs site** (author docs here)
-- **`/docs`**: Legacy Next.js/Nextra documentation site — **deprecated**, do not edit
+- **`/docs-mintlify`**: Mintlify documentation site
 - **`/examples`**: Example implementations and recipes
 
 ### Key Components
@@ -150,8 +148,7 @@ Include scope in parentheses when applicable, e.g., `fix(tesseract):` or `feat(d
 
 ## Important Notes
 
-- Documentation lives in `/docs-mintlify` (active, Mintlify). `/docs` is the legacy docs
-  site and is deprecated — do not add or edit content there. See `docs-mintlify/CLAUDE.md`.
+- Documentation lives in `/docs-mintlify` (Mintlify). See `docs-mintlify/CLAUDE.md`.
 - The main Cube application development happens in `/packages`
 - For data model changes, focus on `cubejs-schema-compiler` package
 - For query execution changes, focus on `cubejs-query-orchestrator` package

CODEOWNERS

@@ -25,7 +25,6 @@
 /packages/*-schema-extension/          @cube-js/schema-compiler
 
 # Doc reviewers
-/docs/           @cube-js/doc-reviewers
 /docs-mintlify/  @keydunov
 
 # Developer Relations and Community

CONTRIBUTING.md

@@ -27,7 +27,7 @@ By contributing to Cube Dev, Inc., You accept and agree to the terms and conditi
 3. Clone the [Cube repo](https://github.com/cube-js/cube).
 4. Submit your Pull Request. 
 5. Testing: Please include test(s) for your code contribution. Depending on a change it can be tested by unit, integration or E2E test. See some of the test examples for [drivers](https://github.com/cube-js/cube/pull/1333/commits/56dadccd62ac4eaceafe650d2853406f5d3d9d43) and [backend](https://github.com/cube-js/cube/tree/master/packages/cubejs-backend-shared/test). There're separate packages for [E2E testing](https://github.com/cube-js/cube/tree/master/packages/cubejs-testing/) and [E2E driver testing](https://github.com/cube-js/cube/tree/master/packages/cubejs-testing-drivers/). **Tests are required for most of the contributions.**
-6. Documentation: When new features are added or there are changes to existing features that require updates to documentation, we encourage you to add/update any missing documentation in the [`/docs` folder](https://github.com/cube-js/cube/tree/master/docs). To update an existing documentation page, you can simply click on the `Edit this page` button on the top right corner of the documentation page. 
+6. Documentation: When new features are added or there are changes to existing features that require updates to documentation, we encourage you to add/update any missing documentation in the [`/docs-mintlify` folder](https://github.com/cube-js/cube/tree/master/docs-mintlify). 
 7. Relevant team(s) will be pinged automatically for a review based on information in the `CODEOWNERS` file. 
 
 ## Development Workflow

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-  <a href="https://cube.dev?ref=github-readme"><img src="https://raw.githubusercontent.com/cube-js/cube/master/docs/content/cube-core-logo.png" alt="Cube Core — Open-Source Semantic Layer" width="300px"></a>
+  <a href="https://cube.dev?ref=github-readme"><img src="https://raw.githubusercontent.com/cube-js/cube/master/.github/assets/cube-core-logo.png" alt="Cube Core — Open-Source Semantic Layer" width="300px"></a>
 </p>
 <br/>
 
@@ -14,7 +14,7 @@ __Cube Core is the open-source semantic layer.__ Define metrics, dimensions, joi
 Cube Core works with all SQL data sources, including cloud data warehouses like Snowflake, Databricks, and BigQuery; query engines like Presto and Amazon Athena; and application databases like Postgres. It has a built-in relational caching engine to provide sub-second latency and high concurrency for API requests.
 
 <img
-  src="https://raw.githubusercontent.com/cube-js/cube/master/docs/content/cube-core-schema.png"
+  src="https://raw.githubusercontent.com/cube-js/cube/master/.github/assets/cube-core-schema.png"
   alt="Cube Core — semantic layer connecting data sources to embedded analytics, BI tools, and AI agents"
   style="border: none"
   width="100%"

docs-mintlify/CLAUDE.md

@@ -1,11 +1,8 @@
 # Cube Documentation (Mintlify)
 
-This is the **active** Cube documentation site, built with [Mintlify](https://mintlify.com).
+The Cube documentation site, built with [Mintlify](https://mintlify.com).
 All documentation work should happen here.
 
-> The `/docs` directory at the repo root is the **legacy** Nextra docs site and is
-> **deprecated** — do not add or edit content there.
-
 ## Local development
 
 ```bash