# estuary/flow — health index 74/100 (Good)

> Inspection of the public repository estuary/flow by inspect.software. It holds a health index of 74 out of 100, placing it in the Good band. The index is a signal derived from publicly visible practice, not a warranty, a security audit, or an endorsement, and it is independent of payment.

- Repository: https://github.com/estuary/flow
- Report page: https://inspect.software/software/estuary/flow
- Full JSON report: https://inspect.software/api/repositories/estuary/flow/report
- Badge: https://raw.githubusercontent.com/inspect-software/badges/main/v1/e/estuary/flow.svg
- Inspected: 2026-07-17
- Methodology: metrics 1.13.0, report schema 0.11.0 (https://inspect.software/methodology.md)

## Category summary

| Category | Weight | Index | Band |
|---|---|---|---|
| Vitality | 22% | 96/100 | Excellent |
| Community & Adoption | 18% | 70/100 | Good |
| Sustainability & Governance | 24% | 76/100 | Good |
| Engineering Quality | 20% | 71/100 | Good |
| Security | 16% | 52/100 | Moderate |
| AI Readiness | not counted | 80/100 | Good |

## Repository facts

| Field | Value |
|---|---|
| Description | 🌊 Continuously synchronize the systems where your data lives, to the systems where you _want_ it to live, by managing your data flows with Estuary. 🌊 |
| Homepage | https://estuary.dev |
| Primary language | Rust |
| Stars | 948 |
| Forks | 96 |
| Created | 2020-02-13 |
| Last push | 2026-07-17 |
| Latest release | v0.6.11 |
| Commits (last year) | 1,058 |
| Bus factor | 2 |
| Topics | change-data-capture, data, data-collection, data-engineering, data-integration, data-pipeline, elt, etl |

## Published packages

| Registry | Package | Latest | Monthly downloads |
|---|---|---|---|
| go | github.com/estuary/flow | v0.6.11 | — |

## Vitality — 96/100 (Excellent)

Is the project alive — is code being written and are releases shipping? Weight: 22% of the overall index.

### Development activity — 100/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Push recency | met | 36 / 36 | last push 0 days ago |
| Commit cadence | met | 36 / 36 | 52/52 weeks with commits |
| Commit volume | met | 18 / 18 | 1058 commits in the last year |
| OpenSSF Scorecard: Maintained | met | 10 / 10 | 30 commit(s) and 9 issue activity found in the last 90 days -- score normalized to 10 |

### Release discipline — 90/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ships releases | met | 27 / 27 | 61 releases published |
| Release recency | met | 36 / 36 | latest release 3 days ago |
| Release cadence | met | 27 / 27 | a release every ~19.4 days |
| OpenSSF Scorecard: Signed-Releases | not met | 0 / 10 | Project has not signed or included provenance with any releases. |

### Abandonment — 100/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Project is still maintained | met | 100 / 100 | maintenance record not established from the collected data |

## Community & Adoption — 70/100 (Good)

Does the project have users, downloads, attention, and a welcoming setup for contributors? Weight: 18% of the overall index.

### Popularity & adoption — 70/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Stars | partial | 48.3 / 60 | 948 stars |
| Forks | partial | 16.5 / 25 | 96 forks |
| Watchers | partial | 5.3 / 15 | 10 watchers |

### Community health — 71/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | met | 22.5 / 22.5 | — |
| License | partial | 16.9 / 22.5 | license file present, not a recognized license |
| CONTRIBUTING guide | met | 18 / 18 | — |
| Code of conduct | not met | 0 / 13.5 | — |
| Issue template | not met | 0 / 7.2 | — |
| PR template | met | 6.3 / 6.3 | — |

## Sustainability & Governance — 76/100 (Good)

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep? Weight: 24% of the overall index.

### Maintainer resilience (bus factor) — 63/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Bus factor | partial | 25.2 / 54 | 2 contributor(s) cover half of all commits |
| Commit distribution | partial | 14.3 / 22.5 | top contributor authored 37% of commits |
| Contributor breadth | met | 13.5 / 13.5 | 42 contributors |
| OpenSSF Scorecard: Contributors | met | 10 / 10 | project has 8 contributing companies or organizations |

### Issue & PR responsiveness — 83/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Issue resolution | partial | 34.4 / 46.8 | 74% of issues closed |
| PR acceptance | partial | 33.6 / 38.2 | 2123/2418 decided PRs merged |
| OpenSSF Scorecard: Code-Review | met | 15 / 15 | all changesets reviewed |

### Ownership & stewardship — 67/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ownership backing | met | 30 / 30 | organization-owned |
| Verified domain | not met | 0 / 20 | — |
| Owner reach | partial | 13.6 / 25 | 78 followers of estuary |
| Track record | partial | 23.7 / 25 | 39 public repos, account ~6 yr old |

### Package maintenance — 100/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Published & resolvable | met | 25 / 25 | 1 package(s) on go |
| Publish recency | met | 35 / 35 | latest publish 3 days ago |
| Version history | met | 20 / 20 | 62 published versions |
| Not deprecated | met | 20 / 20 | active, not deprecated or yanked |

## Engineering Quality — 71/100 (Good)

Are baseline engineering and documentation practices in place? Weight: 20% of the overall index.

### Engineering practices — 68/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| CI workflows | met | 24 / 24 | 10 workflow(s) |
| Tests present | met | 24 / 24 | — |
| Linter config | not met | 0 / 16 | — |
| Pre-commit hooks | not met | 0 / 9.6 | — |
| .editorconfig | not met | 0 / 6.4 | — |
| OpenSSF Scorecard: CI-Tests | met | 20 / 20 | 23 out of 23 merged PRs checked by a CI test -- score normalized to 10 |

### Documentation — 75/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | met | 30 / 30 | — |
| Documentation directory | not met | 0 / 25 | — |
| Documentation / homepage site | met | 15 / 15 | https://estuary.dev |
| Repository description | met | 10 / 10 | — |
| Topics | met | 10 / 10 | 8 topics |
| Wiki | met | 10 / 10 | — |

## Security — 52/100 (Moderate)

Are visible security and supply-chain practices strong, with no malicious dependency and no unresolved high-risk jurisdiction exposure? Weight: 16% of the overall index.

### Security posture — 52/100 (Moderate)

Excluded from scoring (no data or not applicable): Packaging. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Binary-Artifacts | met | 7.5 / 7.5 | no binaries found in the repo |
| Branch-Protection | partial | 3.8 / 7.5 | branch protection is not maximal on development and all release branches |
| CI-Tests | met | 2.5 / 2.5 | 23 out of 23 merged PRs checked by a CI test -- score normalized to 10 |
| CII-Best-Practices | not met | 0 / 2.5 | no effort to earn an OpenSSF best practices badge detected |
| Code-Review | met | 7.5 / 7.5 | all changesets reviewed |
| Contributors | met | 2.5 / 2.5 | project has 8 contributing companies or organizations |
| Dangerous-Workflow | not met | 0 / 10 | dangerous workflow patterns detected |
| Dependency-Update-Tool | met | 7.5 / 7.5 | update tool detected |
| Fuzzing | not met | 0 / 5 | project is not fuzzed |
| License | partial | 2.2 / 2.5 | license file detected |
| Maintained | met | 7.5 / 7.5 | 30 commit(s) and 9 issue activity found in the last 90 days -- score normalized to 10 |
| Packaging | excluded | 0 / 5 | packaging workflow not detected |
| Pinned-Dependencies | partial | 1 / 5 | dependency not pinned by hash detected -- score normalized to 2 |
| SAST | met | 5 / 5 | SAST tool is run on all commits |
| Security-Policy | met | 5 / 5 | security policy file detected |
| Signed-Releases | not met | 0 / 7.5 | Project has not signed or included provenance with any releases. |
| Token-Permissions | not met | 0 / 7.5 | detected GitHub workflow tokens with excessive permissions |
| Vulnerabilities | not met | 0 / 7.5 | 97 existing vulnerabilities detected |

### High-Risk Jurisdiction Exposure — 100/100 (Excellent)

Only high-confidence self-published location evidence affects this multiplier. Ambiguous matches are review-only; country evidence is not proof of nationality, citizenship, legal registration, malicious intent, or sanctions status.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Policy exposure multiplier | met | 100 / 100 | no confirmed policy-scope location match |

## AI Readiness — 80/100 (Good)

How well is the repo equipped to be developed and maintained with AI coding agents? An independent, experimental badge — weight 0.0, so it is surfaced on its own and does not affect the overall health score.

### Agent context & guidance — 75/100 (Good)

Excluded from scoring (no data or not applicable): Legible commit history. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Agent instructions | met | 45 / 45 | AGENTS.md, CLAUDE.md |
| Machine-readable docs (llms.txt) | not met | 0 / 15 | — |
| Legible commit history | excluded | 0 / 40 | no data |

### Verify loop (build / test / typecheck) — 77/100 (Good)

Excluded from scoring (no data or not applicable): Demonstrated agent practice, Automated maintenance. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| One-command bootstrap | met | 18 / 18 | mise.toml |
| Automated tests | met | 22 / 22 | — |
| Lint / format config | not met | 0 / 11 | — |
| Static type checking | met | 11 / 11 | site/tsconfig.json |
| Reproducible environment | met | 10 / 10 | Dockerfile, lockfile |
| Demonstrated agent practice | excluded | 0 / 10 | no data |
| Automated maintenance | excluded | 0 / 8 | no data |
| OpenSSF Scorecard: Pinned-Dependencies | partial | 2 / 10 | dependency not pinned by hash detected -- score normalized to 2 |

### Code legibility for models — 98/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Type-checkable code | met | 45 / 45 | Rust (statically typed) |
| Manageable file sizes | partial | 53.4 / 55 | 29/970 source files over 60KB |

### Machine-readable interfaces — 80/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| API schema (OpenAPI/GraphQL/proto) | met | 40 / 40 | crates/agent/src/integration_tests/graphql/queries/alerts_by_prefix.graphql, crates/agent/src/integration_tests/graphql/queries/alerts_by_prefix_bob.graphql, crates/agent/src/integration_tests/graphql/queries/alerts_by_prefix_bob_started_at_earlier.graphql, crates/agent/src/integration_tests/graphql/queries/live_spec_alert_history.graphql, crates/agent/src/integration_tests/graphql/queries/live_spec_publication_history.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_basic.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_by_name.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_by_name_alice.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_by_name_alice_future_started_at.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_by_name_bob.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_collection_connections_forward.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_collection_connections_reverse.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_connections_forward.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_connections_reverse.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_missing_name_and_prefix.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_pagination_cursor.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_pagination_cursor_beyond_end.graphql, crates/agent/src/integration_tests/graphql/queries/live_specs_reverse_pagination_cursor.graphql, crates/agent/src/integration_tests/graphql/queries/prefixes.graphql, crates/flow-client/control-plane-api.graphql, crates/flowctl/src/alerts/configs/list-query.graphql, crates/flowctl/src/alerts/configs/update-mutation.graphql, crates/flowctl/src/alerts/subscriptions/create-mutation.graphql, crates/flowctl/src/alerts/subscriptions/delete-mutation.graphql, crates/flowctl/src/alerts/subscriptions/list-query.graphql, crates/flowctl/src/alerts/subscriptions/update-mutation.graphql, crates/flowctl/src/auth/list-authorized-prefixes.graphql, crates/flowctl/src/catalog/history/query.graphql, crates/flowctl/src/catalog/list/query.graphql, crates/flowctl/src/catalog/status.graphql, crates/flowctl/src/draft/fetch-connector-endpoint-schema.graphql, crates/flowctl/src/raw/alerts_query.graphql, crates/parser/tests/examples/gtfs-realtime.proto, go/protocols/capture/capture.proto, go/protocols/derive/derive.proto, go/protocols/flow/flow.proto, go/protocols/materialize/materialize.proto, go/protocols/materialize/testdata/materialization.proto, go/protocols/ops/ops.proto, go/protocols/runtime/runtime.proto, go/protocols/shuffle/shuffle.proto |
| MCP server | not met | 0 / 20 | — |
| Runnable examples | met | 40 / 40 | examples, samples |

## Collection warnings

- Could not fetch pypi package 'estuary-flow' from its registry
- Resolved dependency list truncated to 2000 of 2343 packages (counts remain complete)

## What this report is

inspect.software measures public repositories against a single published, versioned methodology and reports the result as a 1–100 health index. Findings are signals derived from what is visible in public repository data — they are not a security audit, a warranty, or an endorsement, and no result depends on payment.

- Methodology, formulas and weights: https://inspect.software/methodology.md
- What a result does and does not claim: https://inspect.software/wiki/signals-not-warranties.md
- Rating bands: https://inspect.software/wiki/scoring-bands.md
- Corrections: https://inspect.software/contact.md
- Index of all documents: https://inspect.software/llms.txt