Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-05 14:55 UTC

databento / dbn

Databento Binary Encoding (DBN) - Fast message encoding and storage format for market data

Rust · PythonApache-2.0★ 170 stars⑂ 27 forkssince Aug 2022View on GitHub ↗

#encoding #rust #serialization #tick-data #zero-copy #market-data #databento #low-latency #zstd #storage #binary-encoding

databento/dbn holds a health index of 86 out of 100, placing it in the Excellent band. It scores highest on Vitality (94/100) and lowest on AI Readiness (44/100). It was last updated today. A single contributor accounts for most of its recent work.

overall / 100

Excellent

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.

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)

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 72 is calibrated to 86 on the published index scale (record calibration 2026-08-02).

Ownership

Databento, Inc.Organization · verified domain

395 followers7 public repossince Apr 2020

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

Package ecosystems

Registry	Package	Version	Downloads / mo	Versions	Last publish
PyPI	databento-dbn	0.69.0	1,720,602	100	3 days ago

Metrics by category

Vitality

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

94Exceptional · 21% of overall

Development activity

96Exceptional

How it's scored

36/36	Push recency — last push 0 days ago
31.8/36	Commit cadence — 46/52 weeks with commits
18/18	Commit volume — 158 commits in the last year
10/10	OpenSSF Scorecard: Maintained — 30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10

Inputs used

commits_last_year	158
human_commit_share	1
days_since_last_push	0
active_weeks_last_year	46

Release discipline

90Excellent

How it's scored

27/27	Ships releases — 100 releases published
36/36	Release recency — latest release 3 days ago
27/27	Release cadence — a release every ~9.3 days
0/10	OpenSSF Scorecard: Signed-Releases — Project has not signed or included provenance with any releases.

Inputs used

releases_count	100
latest_release_tag	v0.69.0
releases_from_tags	no
days_since_latest_release	3
mean_days_between_releases	9.3

Community & Adoption

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

78Good · 17% of overall

Popularity & adoption

53Moderate

How it's scored

36.1/60	Stars — 170 stars
11.8/25	Forks — 27 forks
5.3/15	Watchers — 10 watchers

Inputs used

forks	27
stars	170
watchers	10
growth_state	unverified
growth_factor_pct	100
growth_unverified_reason	no_history

Community health

92Excellent

How it's scored

22.5/22.5	README
22.5/22.5	License — recognized license (Apache-2.0)
18/18	CONTRIBUTING guide
13.5/13.5	Code of conduct
0/7.2	Issue template
6.3/6.3	PR template

Inputs used

has_readme	yes
has_license	yes
readme_badges	6
has_contributing	yes
has_issue_template	no
has_code_of_conduct	yes
readme_badge_services	github.com, shields.io
has_pull_request_template	yes

Ecosystem adoption (downloads)

100Exceptional

How it's scored

80/80	Monthly downloads — 1,720,602 downloads/month across pypi
0/20	Registry dependents — not reported by this ecosystem

Inputs used

packages	databento-dbn
dependents	—
ecosystems	pypi
total_downloads	—
monthly_downloads	1,720,602
unverified_packages_excluded	—

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?

71Good · 23% of overall

Maintainer resilience (bus factor)

32At Risk

How it's scored

9/54	Bus factor — 1 contributor(s) cover half of all commits
3.6/22.5	Commit distribution — top contributor authored 84% of commits
13.5/13.5	Contributor breadth — 13 contributors
6/10	OpenSSF Scorecard: Contributors — project has 2 contributing companies or organizations -- score normalized to 6

Inputs used

bus_factor	1
contributors_sampled	13
top_contributor_share	0.84

Issue & PR responsiveness

78Good

How it's scored

42/42	Issue resolution — 100% of issues closed
26/30	PR acceptance — 104/120 decided PRs merged
0/13	Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15	OpenSSF Scorecard: Code-Review — Found 0/30 approved changesets -- score normalized to 0

Inputs used

merged_prs	104
open_issues	0
closed_issues	12
prs_merged_7d	0
prs_decided_7d	0
prs_merged_30d	0
prs_decided_30d	0
issue_closed_ratio	1
closed_unmerged_prs	16
first_time_authors_30d	0
first_time_prs_merged_30d	0
first_time_prs_decided_30d	0

Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.

Ownership & stewardship

87Excellent

How it's scored

30/30	Ownership backing — organization-owned
20/20	Verified domain
18.7/25	Owner reach — 395 followers of databento
18.6/25	Track record — 7 public repos, account ~6 yr old

Inputs used

followers	395
owner_type	Organization
is_verified	yes
owner_login	databento
public_repos	7
account_age_days	2,327

Package maintenance

100Exceptional

How it's scored

25/25	Published & resolvable — 1 package(s) on pypi
35/35	Publish recency — latest publish 3 days ago
20/20	Version history — 100 published versions
20/20	Not deprecated — active, not deprecated or yanked

Inputs used

packages	databento-dbn
ecosystems	pypi
any_deprecated	no
min_days_since_publish	3

Engineering Quality

Are baseline engineering and documentation practices in place?

66Good · 19% of overall

Engineering practices

60Moderate

How it's scored

24/24	CI workflows — 2 workflow(s)
24/24	Tests present
0/16	Linter config
0/9.6	Pre-commit hooks
0/6.4	.editorconfig
0/20	OpenSSF Scorecard: CI-Tests — no data

Inputs used

has_ci	yes
has_tests	yes
has_editorconfig	no
has_linter_config	no
has_precommit_config	no

Excluded from scoring (no data or not applicable): OpenSSF Scorecard: CI-Tests. Remaining weights renormalized.

Documentation

75Good

How it's scored

30/30	README
0/25	Documentation directory
15/15	Documentation / homepage site — https://databento.com
10/10	Repository description
10/10	Topics — 11 topics
10/10	Wiki

Inputs used

topics	encoding, rust, serialization, tick-data, zero-copy, market-data, databento, low-latency, zstd, storage, binary-encoding
has_wiki	yes
homepage	https://databento.com
docs_site	https://databento.com
has_readme	yes
has_docs_dir	no
has_description	yes

Security

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

54Moderate · 16% of overall

Security posture

43Weak

How it's scored

7.5/7.5	Binary-Artifacts — no binaries found in the repo
0/7.5	Branch-Protection — no data
0/2.5	CI-Tests — no data
0/2.5	CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5	Code-Review — Found 0/30 approved changesets -- score normalized to 0
1.5/2.5	Contributors — project has 2 contributing companies or organizations -- score normalized to 6
10/10	Dangerous-Workflow — no dangerous workflow patterns detected
0/7.5	Dependency-Update-Tool — no update tool detected
0/5	Fuzzing — project is not fuzzed
2.5/2.5	License — license file detected
7.5/7.5	Maintained — 30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
5/5	Packaging — packaging workflow detected
0/5	Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5	SAST — no SAST tool detected
0/5	Security-Policy — security policy file not detected
0/7.5	Signed-Releases — Project has not signed or included provenance with any releases.
0/7.5	Token-Permissions — detected GitHub workflow tokens with excessive permissions
6.8/7.5	Vulnerabilities — 1 existing vulnerabilities detected

Inputs used

source	openssf_scorecard
checks_evaluated	16
scorecard_version	v5.5.0
checks_inconclusive	2
scorecard_aggregate	4.3

Excluded from scoring (no data or not applicable): Branch-Protection, CI-Tests. Remaining weights renormalized.

Dependency advisories

100Exceptional

How it's scored

35/35	Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25	Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40	No advisories left outstanding — no advisory carries a publication date

Inputs used

source	osv
advisories	2
affected_packages	1
assessed_packages	139
unassessed_packages	22
affected_by_severity	moderate 1
direct_affected_packages	0

Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 139 resolved dependencies against OSV. 22 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.

44Weak · 4% of overall

Agent context & guidance

1Critical

How it's scored

0/45	Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15	Machine-readable docs (llms.txt)
0/40	Legible commit history — 0 of 100 human commits state their intent (structured subject or explanatory body)

Inputs used

has_llms_txt	no
llms_txt_url	—
legible_history_share	0
agent_instruction_files	—
agent_instruction_max_bytes	—

Verify loop (build / test / typecheck)

56Moderate

How it's scored

12.6/18	One-command bootstrap — Cargo.toml, c/Cargo.toml, python/Cargo.toml (toolchain convention, no task runner)
22/22	Automated tests
0/11	Lint / format config
11/11	Static type checking — python/python/databento_dbn/py.typed
10/10	Reproducible environment — lockfile
0/10	Demonstrated agent practice — no agent-authored commits among the last 100
0/8	Automated maintenance — no automated dependency updates observed
0/10	OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0

Inputs used

has_nix	no
has_tests	yes
lockfiles	Cargo.lock
has_dockerfile	no
typed_language	yes
bootstrap_files	—
has_devcontainer	no
has_linter_config	no
typecheck_configs	python/python/databento_dbn/py.typed
agent_commit_share	0
toolchain_manifests	Cargo.toml, c/Cargo.toml, python/Cargo.toml, rust/dbn-cli/Cargo.toml, rust/dbn-macros/Cargo.toml, rust/dbn/Cargo.toml
dependency_bot_commit_share	0

Code legibility for models

98Exceptional

How it's scored

45/45	Type-checkable code — Rust (statically typed)
53.5/55	Manageable file sizes — 3/107 source files over 60KB

Inputs used

primary_language	Rust
largest_source_bytes	245,403
source_files_sampled	107
oversized_source_files	3

Key facts

170GitHub stars

13contributors

158commits, last 12 months

0days since last push

100releases

1bus factor

0open issues

crates.io, PyPIpackage ecosystems

Data collection warnings

Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
Could not fetch crates package 'dbn-c' from its registry
Could not fetch crates package 'databento-dbn' from its registry

More detail

Star and fork history 0 ★ / 27 ⇿

0Stars

27Forks

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.

Major 0Minor 65Patch 34

Each point covers 4 days.

OpenSSF Scorecard 4.3 / 10

4.3aggregate

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 · 2026-09-05 14:55 UTC

10	Binary-Artifacts	no binaries found in the repo
n/a	Branch-Protection	internal 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
n/a	CI-Tests	no pull request found
0	CII-Best-Practices	no effort to earn an OpenSSF best practices badge detected
0	Code-Review	Found 0/30 approved changesets -- score normalized to 0
6	Contributors	project has 2 contributing companies or organizations -- score normalized to 6
10	Dangerous-Workflow	no dangerous workflow patterns detected
0	Dependency-Update-Tool	no update tool detected
0	Fuzzing	project is not fuzzed
10	License	license file detected
10	Maintained	30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
10	Packaging	packaging workflow detected
0	Pinned-Dependencies	dependency not pinned by hash detected -- score normalized to 0
0	SAST	no SAST tool detected
0	Security-Policy	security policy file not detected
0	Signed-Releases	Project has not signed or included provenance with any releases.
0	Token-Permissions	detected GitHub workflow tokens with excessive permissions
9	Vulnerabilities	1 existing vulnerabilities detected

Direct dependencies 8

Registry	Package	Version constraint	Manifest
crates.io	dbn	`—`	c/Cargo.toml
crates.io	anyhow	`—`	c/Cargo.toml
crates.io	libc	`0.2.189`	c/Cargo.toml
crates.io	time	`—`	c/Cargo.toml
crates.io	dbn	`—`	python/Cargo.toml
crates.io	pyo3	`—`	python/Cargo.toml
crates.io	time	`—`	python/Cargo.toml
crates.io	zstd	`—`	python/Cargo.toml

All dependencies 161

Full resolved dependency set from the GitHub dependency graph: 7 direct and 154 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

Registry	Package	Version	Relation
crates.io	anyhow	`1.0.104`	direct
crates.io	dbn	`0.69.0`	direct
crates.io	libc	`—`	direct
crates.io	libc	`0.2.189`	direct
crates.io	pyo3	`0.29.2`	direct
crates.io	time	`0.3.55`	direct
crates.io	zstd	`0.13.3`	direct
crates.io	aho-corasick	`1.1.4`	indirect
crates.io	anstream	`1.0.0`	indirect
crates.io	anstyle	`1.0.14`	indirect
crates.io	anstyle-parse	`1.0.0`	indirect
crates.io	anstyle-query	`1.1.5`	indirect
crates.io	anstyle-wincon	`3.0.11`	indirect
crates.io	assert_cmd	`—`	indirect
crates.io	assert_cmd	`2.2.2`	indirect
crates.io	async-compression	`—`	indirect
crates.io	async-compression	`0.4.43`	indirect
crates.io	async-stream	`—`	indirect
crates.io	async-stream	`0.3.6`	indirect
crates.io	async-stream-impl	`0.3.6`	indirect
crates.io	autocfg	`1.5.1`	indirect
crates.io	bitflags	`2.13.0`	indirect
crates.io	bstr	`1.12.3`	indirect
crates.io	bytes	`1.12.0`	indirect
crates.io	cbindgen	`—`	indirect
crates.io	cbindgen	`0.29.4`	indirect
crates.io	cc	`1.2.66`	indirect
crates.io	cfg-if	`1.0.4`	indirect
crates.io	clap	`—`	indirect
crates.io	clap	`4.6.1`	indirect
crates.io	clap_builder	`4.6.0`	indirect
crates.io	clap_derive	`4.6.1`	indirect
crates.io	clap_lex	`1.1.0`	indirect
crates.io	colorchoice	`1.0.5`	indirect
crates.io	compression-codecs	`0.4.38`	indirect
crates.io	compression-core	`0.4.32`	indirect
crates.io	csv	`1.4.0`	indirect
crates.io	csv-core	`0.1.13`	indirect
crates.io	dbn-macros	`0.69.0`	indirect
crates.io	deranged	`0.5.8`	indirect
crates.io	difflib	`0.4.0`	indirect
crates.io	equivalent	`1.0.2`	indirect
crates.io	errno	`0.3.14`	indirect
crates.io	fallible-streaming-iterator	`—`	indirect
crates.io	fallible-streaming-iterator	`0.1.9`	indirect
crates.io	fastrand	`2.4.1`	indirect
crates.io	find-msvc-tools	`0.1.9`	indirect
crates.io	float-cmp	`0.10.0`	indirect
crates.io	futures-core	`—`	indirect
crates.io	futures-core	`0.3.32`	indirect
crates.io	futures-macro	`0.3.32`	indirect
crates.io	futures-task	`0.3.32`	indirect
crates.io	futures-timer	`3.0.4`	indirect
crates.io	futures-util	`0.3.32`	indirect
crates.io	getrandom	`0.4.3`	indirect
crates.io	glob	`0.3.3`	indirect
crates.io	hashbrown	`0.17.1`	indirect
crates.io	heck	`0.5.0`	indirect
crates.io	indexmap	`2.14.0`	indirect
crates.io	is_terminal_polyfill	`1.70.2`	indirect
crates.io	itoa	`—`	indirect
crates.io	itoa	`1.0.18`	indirect
crates.io	jobserver	`0.1.35`	indirect
crates.io	json-writer	`—`	indirect
crates.io	json-writer	`0.4.0`	indirect
crates.io	linux-raw-sys	`0.12.1`	indirect
crates.io	log	`0.4.33`	indirect
crates.io	memchr	`2.8.2`	indirect
crates.io	memoffset	`0.5.6`	indirect
crates.io	normalize-line-endings	`0.3.0`	indirect
crates.io	num-conv	`0.2.2`	indirect
crates.io	num-traits	`0.2.19`	indirect
crates.io	num_enum	`—`	indirect
crates.io	num_enum	`0.7.6`	indirect
crates.io	num_enum_derive	`0.7.6`	indirect
crates.io	once_cell	`1.21.4`	indirect
crates.io	once_cell_polyfill	`1.70.2`	indirect
crates.io	pin-project-lite	`0.2.17`	indirect
crates.io	pkg-config	`0.3.33`	indirect
crates.io	portable-atomic	`1.13.1`	indirect
crates.io	powerfmt	`0.2.0`	indirect
crates.io	predicates	`—`	indirect
crates.io	predicates	`3.1.4`	indirect
crates.io	predicates-core	`1.0.10`	indirect
crates.io	predicates-tree	`1.0.13`	indirect
crates.io	proc-macro-crate	`—`	indirect
crates.io	proc-macro-crate	`3.5.0`	indirect
crates.io	proc-macro2	`—`	indirect
crates.io	proc-macro2	`1.0.107`	indirect
crates.io	pyo3-build-config	`0.29.2`	indirect
crates.io	pyo3-ffi	`0.29.2`	indirect
crates.io	pyo3-macros	`0.29.2`	indirect
crates.io	pyo3-macros-backend	`0.29.2`	indirect
crates.io	quote	`—`	indirect
crates.io	quote	`1.0.47`	indirect
crates.io	r-efi	`6.0.0`	indirect
crates.io	regex	`1.12.4`	indirect
crates.io	regex-automata	`0.4.14`	indirect
crates.io	regex-syntax	`0.8.11`	indirect
crates.io	relative-path	`1.9.3`	indirect
crates.io	rstest	`0.26.1`	indirect
crates.io	rstest_macros	`0.26.1`	indirect
crates.io	rustc_version	`0.4.1`	indirect
crates.io	rustix	`1.1.4`	indirect
crates.io	rustversion	`1.0.23`	indirect
crates.io	ryu	`1.0.23`	indirect
crates.io	semver	`1.0.28`	indirect
crates.io	serde	`1.0.228`	indirect
crates.io	serde_core	`1.0.228`	indirect
crates.io	serde_derive	`1.0.228`	indirect
crates.io	serde_json	`1.0.150`	indirect
crates.io	serde_spanned	`1.1.1`	indirect
crates.io	shlex	`2.0.1`	indirect
crates.io	slab	`0.4.12`	indirect
crates.io	strsim	`0.11.1`	indirect
crates.io	strum	`—`	indirect
crates.io	strum	`0.28.0`	indirect
crates.io	strum_macros	`0.28.0`	indirect
crates.io	syn	`—`	indirect
crates.io	syn	`1.0.109`	indirect
crates.io	syn	`2.0.118`	indirect
crates.io	target-lexicon	`0.13.5`	indirect
crates.io	target-triple	`1.0.0`	indirect
crates.io	tempfile	`—`	indirect
crates.io	tempfile	`3.27.0`	indirect
crates.io	termcolor	`1.4.1`	indirect
crates.io	terminal_size	`0.4.4`	indirect
crates.io	termtree	`0.5.1`	indirect
crates.io	thiserror	`—`	indirect
crates.io	thiserror	`2.0.18`	indirect
crates.io	thiserror-impl	`2.0.18`	indirect
crates.io	time-core	`0.1.9`	indirect
crates.io	time-macros	`0.2.32`	indirect
crates.io	tokio	`—`	indirect
crates.io	tokio	`1.52.3`	indirect
crates.io	tokio-macros	`2.7.0`	indirect
crates.io	toml	`0.9.12+spec-1.1.0`	indirect
crates.io	toml	`1.1.2+spec-1.1.0`	indirect
crates.io	toml_datetime	`0.7.5+spec-1.1.0`	indirect
crates.io	toml_datetime	`1.1.1+spec-1.1.0`	indirect
crates.io	toml_edit	`0.25.12+spec-1.1.0`	indirect
crates.io	toml_parser	`1.1.2+spec-1.1.0`	indirect
crates.io	toml_writer	`1.1.1+spec-1.1.0`	indirect
crates.io	trybuild	`—`	indirect
crates.io	trybuild	`1.0.120`	indirect
crates.io	type-layout	`—`	indirect
crates.io	type-layout	`0.2.0`	indirect
crates.io	type-layout-derive	`0.2.0`	indirect
crates.io	unicode-ident	`1.0.24`	indirect
crates.io	utf8parse	`0.2.2`	indirect
crates.io	wait-timeout	`0.2.1`	indirect
crates.io	winapi-util	`0.1.11`	indirect
crates.io	windows-link	`0.2.1`	indirect
crates.io	windows-sys	`0.61.2`	indirect
crates.io	winnow	`0.7.15`	indirect
crates.io	winnow	`1.0.3`	indirect
crates.io	zmij	`1.0.21`	indirect
crates.io	zstd-safe	`7.2.4`	indirect
crates.io	zstd-sys	`2.0.16+zstd.1.5.7`	indirect
PyPI	maturin	`1.15.0`	indirect
PyPI	tomli	`2.4.1`	indirect

Dependency advisories 1

This repository publishes no package the index resolves, so its own dependency graph was assessed — 139 packages, which also include development and test pins that never ship: 1 carry known advisories, of which 0 are direct. 22 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

Package	Version	Relation	Severity	Advisories	Fixed in
memoffset	`0.5.6`	indirect	moderate	2	`0.6.2`

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.

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