cube-js/cube - Open Source PR Review Scorecard

📊 Cube Core is open-source semantic layer for AI, BI and embedded analytics

C-Rank Grade: A (Welcoming) - 70/100

External PR Merge Rate: 70%

Response Time: -

First Timer Success: 71%

Frequently Asked Questions

Is cube-js/cube welcoming to first-time open-source contributors?

cube-js/cube has a recorded first-timer success rate of 71.4%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.

How fast can I expect code review feedback on my pull request?

Maintainers in cube-js/cube respond to incoming external pull requests in approximately 0.0 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.

What does the 69.9 C-Rank™ score (A Tier) represent?

The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 69.9 places cube-js/cube in the A tier.

What is the external contributor pull request merge rate for cube-js/cube?

The external contributor pull request merge rate for cube-js/cube is 70.2%, based on public PR activity from non-core contributors.

Are there Good First Issues available in cube-js/cube?

cube-js/cube currently has 4 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".

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📊 Cube Core is open-source semantic layer for AI, BI and embedded analytics

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AI Maintainer Review Guidelines

Review Persona

Empathetic Technical Mentor

Warmth Score
8.1/10
Patience Score
8.4/10
Nitpick Rate
30%

Highly welcoming maintainers in cube-js/cube. Prompt code reviews with positive guidance for new contributors.

Top PR Submission Do's

  • •Ensure code complies with the project coding style
  • •Keep PRs scoped to a single concern
  • •Include context and link to the related issue

Top PR Friction Pitfalls (Don'ts)

  • •Do not submit PRs without linking an issue
  • •Do not break existing tests without fixing them
  • •Do not mix unrelated refactors in a single PR
Response Velocity
-
No reviewer activity recorded

Average Response Latency

Tracks hours until a maintainer leaves a review, comment, or PR response.

Merge Efficiency
70.2%
Moderate PR acceptance rate

External Acceptance Rate

Percentage of community pull requests successfully merged into main.

First-Timer Success
71.4%
Strong first-timer PR acceptance rate

First PR Conversion

Rate at which developers submitting their first repository PR succeed.

Active Maintainers
23 core
Highly collaborative maintainer core
Diagnostic Health HUD
70.2%
Merge Gauge
71.4%
1st-Timer
Community Vibe49/100

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Active Good First Issues (4)

View on GitHub

Describe the bug Getting this error when running vitest and angular 22 Error: Directory import '<my_project>\node_modules\fast-deep-equal\es6' is not supported resolving ES modules imported from '<my_project>\node_modules@cubejs-client\ngx\fesm2022\cubejs-client-ngx.mjs Did you mean to import "fast-deep-equal/es6/index.js"? I tried to use resolve.alias, optimizeDeps, inline Deps in vitest config, but with no success. Expected behavior No directory import Version: 1.6.66

📅 Opened Jul 7, 2026💬 1 comment
Quality: 40/100Contribute

Describe the bug Setting CUBEJS_SCHEMA_PATH (or schemaPath) to an absolute path silently loads zero data model files. /cubejs-api/v1/meta returns {"cubes":[]} and there are no errors, warnings, or hints in the cube logs. The cause is in FileRepository: https://github.com/cube-js/cube/blob/master/packages/cubejs-backend-shared/src/FileRepository.ts#L22-L35 public localPath(): string { return path.join(process.cwd(), this.repositoryPath); } protected async getFiles(dir: string, fileList: string[] = []): Promise<string[]> { ... const fullPath = path.join(this.localPath(), dir); await fs.ensureDir(fullPath); files = await fs.readdir(fullPath); path.join (unlike path.resolve) does not treat an absolute argument as a reset point — it just concatenates. Combined with the fs.ensureDir call added in #8909, this means an absolute repositoryPath is silently rewritten to live under process.cwd() and the resulting empty directory is created on disk. No error is thrown. > path.join('/cu

📅 Opened Apr 24, 2026💬 2 comments
Quality: 45/100Contribute

Description The Playground's REST API tab displays the order parameter as an object: "order": { "orders.raw_customers_last_name": "asc", "orders.raw_customers_first_name": "desc" } However, Cube's own documentation recommends the alternative order format (array) for reliable multi-column ordering: "order": [ ["orders.raw_customers_last_name", "asc"], ["orders.raw_customers_first_name", "desc"] ] Why this matters JSON object key order is not guaranteed by RFC 7159. While modern JS engines preserve insertion order, this is implementation-dependent and can break across different languages, parsers, or environments. The REST API tab's purpose is to provide copyable examples for integrators. Showing the object format sets developers up for subtle ordering bugs when they copy it into their applications. Consistency: Issue #7217 already requests that Vue's query builder use the array format. The Playground's REST API tab should follow the same principle. Expected behavior The

📅 Opened Jan 22, 2026💬 3 comments
Quality: 30/100Contribute

Describe the bug When building ClickHouse pre-aggregations with build_range_end that includes milliseconds (e.g., '2026-01-20T23:59:59.999Z'), the generated WHERE clause uses parseDateTimeBestEffort(), which truncates to seconds. This causes the WHERE filter to exclude the intended millisecond boundary. This is critical for any pre-aggregation with time boundaries that need millisecond precision with explicitly set build_range_end to the end of period. To Reproduce Build the pre-aggregation for ClickHouse based Cube Observe the generated WHERE clause uses parseDateTimeBestEffort() instead of parseDateTime64BestEffort() Expected behavior The WHERE clause should use parseDateTime64BestEffort() (or equivalent) to preserve millisecond precision. Version: 1.6.4 (relevant for previous too) Additional context In packages/cubejs-schema-compiler/src/adapter/ClickHouseQuery.ts, the dateTimeCast() method returns parseDateTimeBestEffort() when called without a timezone parameter.

📅 Opened Jan 22, 2026💬 2 comments
Quality: 30/100Contribute
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Contributor Compatibility & Review Speed Analysis for cube-js/cube

When evaluating whether to contribute to cube-js/cube, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.

Currently, maintainers of cube-js/cube acknowledge new external contributions in approximately -. Out of all submitted pull requests from non-core authors in the last 180-day window, 70.2% were successfully merged into the primary branch.

Frequently Asked Questions - Contributing to cube-js/cube

01

Is cube-js/cube welcoming to first-time open-source contributors?

cube-js/cube has a recorded first-timer success rate of 71.4%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.

02

How fast can I expect code review feedback on my pull request?

The initial maintainer response time averages ~-. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.

03

What does the 69.9 C-Rank™ score represent?

The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 69.9 places cube-js/cube in the Welcoming tier.

04

What is the external contributor pull request merge rate for cube-js/cube?

The external pull request merge rate is 70.2%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.

05

Are there beginner Good First Issues open in cube-js/cube?

Yes, cube-js/cube currently has 4 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.

GetMerged C-Rank™ Indexing Standard

All metrics displayed for cube-js/cube are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.