Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

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  • Landing page: work-in-progress status and an invitation to contribute
    Open
    • Is something wrong?
    a11y area: app-shell feature

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#72 ·

    Maintainers usually reply within 1 day

  • M7: v1.0 (tracking)
    Open
    • Is something wrong?
    tracking

    Difficulty 5/5 Over a week Newbie friendliness 5/100

    Karthik-beta/Blinkql#64 ·

    Maintainers usually reply within 1 day

  • Complete documentation and v1.0 release notes
    Open
    • Is something wrong?
    docs

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#63 ·

    Maintainers usually reply within 1 day

  • Cross-browser e2e coverage of core flows (Chromium, Firefox, WebKit)
    Open
    • Is something wrong?
    tests

    Difficulty 4/5 1-2 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#62 ·

    Maintainers usually reply within 1 day

  • Onboarding tour using the sample datasets
    Open
    • Is something wrong?
    area: app-shell feature

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#61 ·

    Maintainers usually reply within 1 day

  • Shareable query links (SQL and chart settings only, never data)
    Open
    • Is something wrong?
    area: app-shell feature security

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    Karthik-beta/Blinkql#60 ·

    Maintainers usually reply within 1 day

  • Keyboard shortcuts and command palette
    Open
    • Is something wrong?
    a11y area: app-shell feature

    Difficulty 5/5 Over a week Newbie friendliness 18/100

    Karthik-beta/Blinkql#59 ·

    Maintainers usually reply within 1 day

  • Accessibility pass: keyboard-only flows, screen-reader labels, axe-clean core flows
    Open
    • Is something wrong?
    a11y tests

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#58 ·

    Maintainers usually reply within 1 day

  • M6: Performance pass II (tracking)
    Open
    • Is something wrong?
    tracking

    Difficulty 5/5 Over a week Newbie friendliness 8/100

    Karthik-beta/Blinkql#57 ·

    Maintainers usually reply within 1 day

  • Performance regression checks in CI
    Open
    • Is something wrong?
    area: bench area: infra chore perf

    Difficulty 4/5 3-5 days Newbie friendliness 28/100

    Karthik-beta/Blinkql#56 ·

    Maintainers usually reply within 1 day

  • P-12: Code-split the editor and chart libraries
    Open
    • Is something wrong?
    area: app-shell perf

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#55 ·

    Maintainers usually reply within 1 day

  • P-08: Single-threaded vs multithreaded engine evaluation
    Open
    • Is something wrong?
    adr area: engine perf

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    Karthik-beta/Blinkql#54 ·

    Maintainers usually reply within 1 day

  • P-11: Canvas-rendered results grid
    Open
    • Is something wrong?
    a11y area: results perf

    Difficulty 5/5 Over a week Newbie friendliness 15/100

    Karthik-beta/Blinkql#53 ·

    Maintainers usually reply within 1 day

  • PWA: service worker caching and offline mode
    Open
    • Is something wrong?
    area: app-shell feature

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    Karthik-beta/Blinkql#52 ·

    Maintainers usually reply within 1 day

  • P-07: Lazy-load and cache the engine
    Open
    • Is something wrong?
    area: engine area: infra perf

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    Karthik-beta/Blinkql#51 ·

    Maintainers usually reply within 1 day

  • M5: Operations analytics pack (tracking)
    Open
    • Is something wrong?
    tracking

    Difficulty 5/5 Over a week Newbie friendliness 8/100

    Karthik-beta/Blinkql#50 ·

    Maintainers usually reply within 1 day

  • Template: data-quality checks for import files
    Open
    • Is something wrong?
    help wanted template

    Difficulty 4/5 3-5 days Newbie friendliness 22/100

    Karthik-beta/Blinkql#49 ·

    Maintainers usually reply within 1 day

  • Template: two-file reconciliation (e.g. ERP vs MES)
    Open
    • Is something wrong?
    help wanted template

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    Karthik-beta/Blinkql#48 ·

    Maintainers usually reply within 1 day

  • Template: shift-aware reporting (night shift across midnight)
    Open
    • Is something wrong?
    help wanted template

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#47 ·

    Maintainers usually reply within 1 day

  • Template: MTTR and MTBF per machine
    Open
    • Is something wrong?
    help wanted template

    Difficulty 3/5 1-2 days Newbie friendliness 50/100

    Karthik-beta/Blinkql#46 ·

    Maintainers usually reply within 1 day

  • Template: downtime Pareto
    Open
    • Is something wrong?
    help wanted template

    Difficulty 3/5 1-2 days Newbie friendliness 50/100

    Karthik-beta/Blinkql#45 ·

    Maintainers usually reply within 1 day

  • Template: OEE (availability × performance × quality)
    Open
    • Is something wrong?
    help wanted template

    Difficulty 3/5 1-2 days Newbie friendliness 55/100

    Karthik-beta/Blinkql#44 ·

    Maintainers usually reply within 1 day

  • Template framework with column mapping
    Open
    • Is something wrong?
    feature template

    Difficulty 5/5 Over a week Newbie friendliness 15/100

    Karthik-beta/Blinkql#43 ·

    Maintainers usually reply within 1 day

  • Synthetic manufacturing sample datasets: telemetry, breakdowns, shifts and quality
    Open
    • Is something wrong?
    dataset help wanted

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#42 ·

    Maintainers usually reply within 1 day

  • M4: Big files & persistence (tracking)
    Open
    • Is something wrong?
    tracking

    Difficulty 5/5 Over a week Newbie friendliness 12/100

    Karthik-beta/Blinkql#41 ·

    Maintainers usually reply within 1 day

  • Memory guardrails: size warnings, out-of-memory recovery and engine restart
    Open
    • Is something wrong?
    area: engine feature

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    Karthik-beta/Blinkql#40 ·

    Maintainers usually reply within 1 day

  • Query remote Parquet and CSV files by URL
    Open
    • Is something wrong?
    area: catalog area: engine feature

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    Karthik-beta/Blinkql#39 ·

    Maintainers usually reply within 1 day

  • P-09: Optional CSV → Parquet conversion on import
    Open
    • Is something wrong?
    area: catalog area: persistence feature perf

    Difficulty 4/5 3-5 days Newbie friendliness 22/100

    Karthik-beta/Blinkql#38 ·

    Maintainers usually reply within 1 day

  • Persist imported datasets in OPFS
    Open
    • Is something wrong?
    area: persistence feature

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#37 ·

    Maintainers usually reply within 1 day

  • M3: Explore & visualize (tracking)
    Open
    • Is something wrong?
    tracking

    Difficulty 5/5 Over a week Newbie friendliness 8/100

    Karthik-beta/Blinkql#36 ·

    Maintainers usually reply within 1 day

  • Usability check: profile a file and build a chart in under a minute
    Open
    • Is something wrong?
    help wanted

    Difficulty 5/5 Over a week Newbie friendliness 15/100

    Karthik-beta/Blinkql#35 ·

    Maintainers usually reply within 1 day

  • Export results as CSV and Parquet, and charts as PNG
    Open
    • Is something wrong?
    area: charts area: results feature

    Difficulty 4/5 3-5 days Newbie friendliness 20/100

    Karthik-beta/Blinkql#34 ·

    Maintainers usually reply within 1 day

  • Query history and saved queries (IndexedDB)
    Open
    • Is something wrong?
    area: persistence feature

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    Karthik-beta/Blinkql#33 ·

    Maintainers usually reply within 1 day

  • Accessible charts: data-table fallback and descriptive labels
    Open
    • Is something wrong?
    a11y area: charts

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    Karthik-beta/Blinkql#32 ·

    Maintainers usually reply within 1 day

  • P-10: SQL-side downsampling for charts vs client-side
    Open
    • Is something wrong?
    area: charts perf

    Difficulty 5/5 Over a week Newbie friendliness 18/100

    Karthik-beta/Blinkql#31 ·

    Maintainers usually reply within 1 day

  • Chart builder: bar, line, scatter, histogram and Pareto
    Open
    • Is something wrong?
    area: charts feature

    Difficulty 5/5 Over a week Newbie friendliness 18/100

    Karthik-beta/Blinkql#30 ·

    Maintainers usually reply within 1 day

  • Schema-aware SQL autocomplete
    Open
    • Is something wrong?
    area: editor feature

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#29 ·

    Maintainers usually reply within 1 day

  • One-click data profiling (SUMMARIZE)
    Open
    • Is something wrong?
    area: catalog feature help wanted

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#28 ·

    Maintainers usually reply within 1 day

  • Schema browser with column types and statistics
    Open
    • Is something wrong?
    area: catalog feature

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#27 ·

    Maintainers usually reply within 1 day

  • M2: Performance pass I (tracking)
    Open
    • Is something wrong?
    tracking

    Difficulty 5/5 Over a week Newbie friendliness 12/100

    Karthik-beta/Blinkql#26 ·

    Maintainers usually reply within 1 day

  • Detect main-thread long tasks during queries in tests
    Open
    • Is something wrong?
    area: bench perf tests

    Difficulty 4/5 3-5 days Newbie friendliness 40/100

    Karthik-beta/Blinkql#25 ·

    Maintainers usually reply within 1 day

  • P-06: Query cancellation and superseded-query handling
    Open
    • Is something wrong?
    area: engine feature perf

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    Karthik-beta/Blinkql#24 ·

    Maintainers usually reply within 1 day

  • P-05: Stream record batches and render first rows early
    Open
    • Is something wrong?
    area: engine area: results perf

    Difficulty 4/5 3-5 days Newbie friendliness 22/100

    Karthik-beta/Blinkql#23 ·

    Maintainers usually reply within 1 day

  • P-04: Virtualized results grid (TanStack Virtual)
    Open
    • Is something wrong?
    a11y area: results perf

    Difficulty 4/5 3-5 days Newbie friendliness 20/100

    Karthik-beta/Blinkql#22 ·

    Maintainers usually reply within 1 day

  • P-03: Move results out of React state into a result store
    Open
    • Is something wrong?
    area: results perf

    Difficulty 4/5 3-5 days Newbie friendliness 22/100

    Karthik-beta/Blinkql#21 ·

    Maintainers usually reply within 1 day

  • P-02: Keep results as Arrow and read cell values lazily
    Open
    • Is something wrong?
    area: results perf

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    Karthik-beta/Blinkql#20 ·

    Maintainers usually reply within 1 day

  • M1: Core query loop (tracking)
    Open
    • Is something wrong?
    tracking

    Difficulty 5/5 Over a week Newbie friendliness 8/100

    Karthik-beta/Blinkql#19 ·

    Maintainers usually reply within 1 day

  • E2E: import and query a 1M-row file end to end
    Open
    • Is something wrong?
    tests

    Difficulty 3/5 1-2 days Newbie friendliness 50/100

    Karthik-beta/Blinkql#18 ·

    Maintainers usually reply within 1 day

  • P-01: Baseline benchmark and write-up
    Open
    • Is something wrong?
    area: bench perf

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    Karthik-beta/Blinkql#17 ·

    Maintainers usually reply within 1 day

  • Readable engine error messages
    Open
    • Is something wrong?
    area: engine feature

    Difficulty 4/5 3-5 days Newbie friendliness 40/100

    Karthik-beta/Blinkql#16 ·

    Maintainers usually reply within 1 day

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