Public record
Software health reportschema 0.31.0 · metrics 2.5.0 · 2026-08-08 19:12 UTC

ag2ai / faststream

FastStream is an asynchronous Python framework for building event-driven applications. It brings together message broker integration, dependency injection, validation, testing utilities, and AsyncAPI documentation generation in a single toolkit

PythonApache-2.0★ 5,296 stars⑂ 373 forkssince Dec 2022View on GitHub ↗
KindLibraryCommand-line toolNetwork servicehow this is determined

ag2ai/faststream holds a health index of 98 out of 100, placing it in the Exceptional band. It scores highest on Vitality (99/100) and lowest on Security (78/100). It was last updated 1 day ago. 3 contributors account for most of its recent work.

98
overall / 100
Exceptional

Software health index

Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.

98
Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met
Excellent80-92Strong across the board; minor gaps
Good65-79Healthy; gaps are limited and manageable
Moderate50-64Acceptable with notable gaps; review recommended
Weak35-49Material weaknesses across several areas
At Risk20-34Significant weaknesses; adoption warrants caution
Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)
VitalityCommunity &AdoptionSustainability &GovernanceEngineeringQualitySecurityAI Readiness

Score profile

Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.

The weighted overall 88 is calibrated to 98 on the published index scale (record calibration 2026-08-02).

Ownership

ag2aiOrganization
456 followers32 public repossince Nov 2024

This repository is backed by an organization — shared, accountable stewardship that can outlive any single maintainer.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
PyPIfaststream0.7.41,401,5211231 day agorabbitmqkafkanatsredismqttasyncapiframeworkmessage-brokers

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

99Exceptional · 21% of overall
How it's scored
36/36Push recency — last push 1 days ago
35.3/36Commit cadence — 51/52 weeks with commits
18/18Commit volume — 586 commits in the last year
10/10OpenSSF Scorecard: Maintained — 30 commit(s) and 12 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year586
human_commit_share0.69
days_since_last_push1
active_weeks_last_year51

Release discipline

100Exceptional
How it's scored
27/27Ships releases — 100 releases published
36/36Release recency — latest release 1 days ago
27/27Release cadence — a release every ~24.5 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count100
latest_release_tag0.7.4
releases_from_tagsno
days_since_latest_release1
mean_days_between_releases24.5
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: Signed-Releases. Remaining weights renormalized.

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

93Exceptional · 17% of overall
How it's scored
60/60Stars — 5,296 stars
21.4/25Forks — 373 forks
8.1/15Watchers — 30 watchers
Inputs used
forks373
stars5,296
watchers30
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

92Excellent
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (Apache-2.0)
18/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges11
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_servicesgithub.com, shields.io
has_pull_request_templateyes
How it's scored
80/80Monthly downloads — 1,401,521 downloads/month across pypi
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagesfaststream
dependents
ecosystemspypi
total_downloads
monthly_downloads1,401,521
Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

80Excellent · 23% of overall
How it's scored
36/54Bus factor — 3 contributor(s) cover half of all commits
15.7/22.5Commit distribution — top contributor authored 30% of commits
13.5/13.5Contributor breadth — 98 contributors
10/10OpenSSF Scorecard: Contributors — project has 29 contributing companies or organizations
Inputs used
bus_factor3
contributors_sampled98
top_contributor_share0.304
How it's scored
38.2/42Issue resolution — 91% of issues closed
24.3/30PR acceptance — 1,466/1,810 decided PRs merged
10.1/13Newcomer PR acceptance — 7/9 first-time contributors' PRs merged in 30d
15/15OpenSSF Scorecard: Code-Review — all changesets reviewed
Inputs used
merged_prs1,466
open_issues84
closed_issues849
prs_merged_7d6
prs_decided_7d9
prs_merged_30d32
prs_decided_30d37
issue_closed_ratio0.91
closed_unmerged_prs344
first_time_authors_30d7
first_time_prs_merged_30d7
first_time_prs_decided_30d9
How it's scored
30/30Ownership backing — organization-owned
0/20Verified domain
19.1/25Owner reach — 456 followers of ag2ai
14.5/25Track record — 32 public repos, account ~1 yr old
Inputs used
followers456
owner_typeOrganization
is_verified
owner_loginag2ai
public_repos32
account_age_days634

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on pypi
35/35Publish recency — latest publish 1 days ago
20/20Version history — 123 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesfaststream
ecosystemspypi
any_deprecatedno
min_days_since_publish1

Engineering Quality

Are baseline engineering and documentation practices in place?

92Excellent · 19% of overall
How it's scored
24/24CI workflows — 13 workflow(s)
24/24Tests present
16/16Linter config — ruff.toml
9.6/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 30 out of 30 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configyes

Documentation

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage site — http://faststream.ag2.ai/latest/
10/10Repository description
10/10Topics — 12 topics
0/10Wiki
Inputs used
topicsasyncio, kafka, python, rabbitmq, asyncapi, distributed-systems, faststream, nats, redis, stream-processing, mqtt, mqtt-broker
has_wikino
homepagehttp://faststream.ag2.ai/latest/
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

78Good · 16% of overall
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
0/7.5Branch-Protection — no data
2.5/2.5CI-Tests — 30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
7.5/7.5Code-Review — all changesets reviewed
2.5/2.5Contributors — project has 29 contributing companies or organizations
10/10Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5Dependency-Update-Tool — update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
7.5/7.5Maintained — 30 commit(s) and 12 issue activity found in the last 90 days -- score normalized to 10
5/5Packaging — packaging workflow detected
4.5/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 9
4/5SAST — SAST tool detected but not run on all commits
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities — 16 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate7.3
Excluded from scoring (no data or not applicable): branch_protection, signed_releases. Remaining weights renormalized.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories24
affected_packages5
assessed_packages190
unassessed_packages3
affected_by_severityhigh 5
direct_affected_packages0
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 190 resolved dependencies against OSV. 3 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.

AI Readiness

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.

80Excellent · 4% of overall
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
15/15Machine-readable docs (llms.txt) — llms.txt present
40/40Legible commit history — 69 of 69 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtyes
legible_history_share1
agent_instruction_files
agent_instruction_max_bytes
How it's scored
18/18One-command bootstrap — justfile
22/22Automated tests
11/11Lint / format config — ruff.toml
11/11Static type checking — faststream/py.typed
10/10Reproducible environment — Dockerfile, lockfile
10/10Demonstrated agent practice — 21 of the last 100 commits agent-authored or agent-credited
8/8Automated maintenance — 31 of the last 100 commits are automated dependency updates
9/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 9
Inputs used
has_nixno
has_testsyes
lockfilesuv.lock
has_dockerfileyes
typed_languageno
bootstrap_filesjustfile
has_devcontainerno
has_linter_configyes
typecheck_configsfaststream/py.typed
agent_commit_share0.21
toolchain_manifests
dependency_bot_commit_share0.31
How it's scored
27/45Type-checkable code — Python with type-check config (faststream/py.typed)
55/55Manageable file sizes — 0/1,877 source files over 60KB
Inputs used
primary_languagePython
largest_source_bytes58,731
source_files_sampled1,877
oversized_source_files0
How it's scored
40/40API schema (OpenAPI/GraphQL/proto) — examples/serialization/protobuf/message.proto
0/20MCP server
40/40Runnable examples — examples
Inputs used
example_dirsexamples
has_mcp_signalno
api_schema_filesexamples/serialization/protobuf/message.proto

Key facts

5,296GitHub stars
98contributors
586commits, last 12 months
1days since last push
100releases
3bus factor
84open issues
PyPIpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • First-time contributor figures cover 12 of 13 authors (cap 12)
  • deps.dev does not index pypi:faststream@0.7.4; advisories assessed against the repository dependency graph instead

More detail

Star and fork history 0 ★ / 373 ⇿
0Stars
373Forks
99Releases

When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.

0125250375370112023-032024-112026-08
Major 0Minor 5Patch 83

Each point covers 4 days.

OpenSSF Scorecard 7.3 / 10
7.3aggregate

Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-08-08 19:11 UTC

10Binary-Artifactsno binaries found in the repo
n/aBranch-Protectioninternal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md
10CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
10Code-Reviewall changesets reviewed
10Contributorsproject has 29 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained30 commit(s) and 12 issue activity found in the last 90 days -- score normalized to 10
10Packagingpackaging workflow detected
9Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 9
8SASTSAST tool detected but not run on all commits
10Security-Policysecurity policy file detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0Vulnerabilities16 existing vulnerabilities detected
Direct dependencies 3
RegistryPackageVersion constraintManifest
PyPIfast-depends>=3.0.0pyproject.toml
PyPItyping-extensions>=4.12.0pyproject.toml
PyPIanyio>=4.0,<5pyproject.toml
All dependencies 193

Full resolved dependency set from the GitHub dependency graph: 3 direct and 190 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
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Dependency advisories 5

This repository publishes no package the index resolves, so its own dependency graph was assessed — 190 packages, which also include development and test pins that never ship: 5 carry known advisories, of which 0 are direct. 3 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

PackageVersionRelationSeverityAdvisoriesFixed in
click8.1.8indirecthigh18.3.3
gitpython3.1.57indirecthigh63.1.58
mcp1.23.3indirecthigh61.28.1
pymdown-extensions11.0indirecthigh111.0.1
starlette0.50.0indirecthigh101.3.1

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

Raw JSON report machine-readable

Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.

Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.5.0, schema v0.31.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statisticsPyPI.