Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-17 11:22 UTC

rust-random / rngs

Extra RNGs

RustCustom license★ 54 stars⑂ 43 forkssince Sep 2019View on GitHub ↗

rust-random/rngs holds a health index of 69 out of 100, placing it in the Good band. It scores highest on Sustainability & Governance (70/100) and lowest on Vitality (50/100). It was last updated 4 days ago. A single contributor accounts for most of its recent work.

overall / 100

Good

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 62 is calibrated to 69 on the published index scale (record calibration 2026-08-02).

Ownership

rust-randomOrganization

74 followers10 public repossince Aug 2018

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	Tags
crates.io	rand_hc	0.5.1	5,654,325	10	93 days ago	hc128 random rng algorithms no-std
crates.io	rand_pcg	0.10.2	18,469,677	20	158 days ago	pcg random rng algorithms no-std
crates.io	rand_sfc	0.2.0	816	8	227 days ago	random rng algorithms no-std
crates.io	rand_isaac	0.5.1	1,817,426	9	120 days ago	isaac random rng algorithms no-std
crates.io	rand_chachapoints to another repo — not scored	0.10.0	98,916,843	16	227 days ago	chacha random rng algorithms no-std
crates.io	rand_jitter	0.6.1	1,785,656	12	123 days ago	os random rng
crates.io	rand_xoshiro	0.8.1	10,115,886	11	123 days ago	random rng algorithms

Metrics by category

Vitality

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

50Moderate · 21% of overall

Development activity

83Excellent

How it's scored

36/36	Push recency — last push 4 days ago
18.7/36	Commit cadence — 27/52 weeks with commits
18/18	Commit volume — 107 commits in the last year
10/10	OpenSSF Scorecard: Maintained — 16 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10

Inputs used

commits_last_year	107
human_commit_share	0.94
days_since_last_push	4
active_weeks_last_year	27

Release discipline

1Critical

How it's scored

0/27	Ships releases — no releases published
0/36	Release recency — no releases
0/27	Release cadence — no releases
0/10	OpenSSF Scorecard: Signed-Releases — no data

Inputs used

releases_count

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?

58Moderate · 17% of overall

Popularity & adoption

43Weak

How it's scored

28/60	Stars — 54 stars
13.5/25	Forks — 43 forks
1.7/15	Watchers — 3 watchers

Inputs used

forks	43
stars	54
watchers	3
growth_state	unverified
growth_factor_pct	100
growth_unverified_reason	no_history

Community health

44Weak

How it's scored

22.5/22.5	README
16.9/22.5	License — license file present, not a recognized license
0/18	CONTRIBUTING guide
0/13.5	Code of conduct
0/7.2	Issue template
0/6.3	PR template

Inputs used

has_readme	yes
has_license	yes
readme_badges	2
has_contributing	no
has_issue_template	no
has_code_of_conduct	no
readme_badge_services	github.com, shields.io
has_pull_request_template	no

Ecosystem adoption (downloads)

100Exceptional

How it's scored

80/80	Monthly downloads — 37,843,786 downloads/month across crates
0/20	Registry dependents — not reported by this ecosystem

Inputs used

packages	rand_hc, rand_pcg, rand_sfc, rand_isaac, rand_jitter, rand_xoshiro
dependents	—
ecosystems	crates
total_downloads	587,728,847
monthly_downloads	37,843,786
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?

70Good · 23% of overall

Maintainer resilience (bus factor)

42Weak

How it's scored

9/54	Bus factor — 1 contributor(s) cover half of all commits
9.3/22.5	Commit distribution — top contributor authored 59% of commits
13.5/13.5	Contributor breadth — 22 contributors
10/10	OpenSSF Scorecard: Contributors — project has 3 contributing companies or organizations -- score normalized to 10

Inputs used

bus_factor	1
contributors_sampled	22
top_contributor_share	0.588

Issue & PR responsiveness

85Excellent

How it's scored

36.6/42	Issue resolution — 87% of issues closed
25.1/30	PR acceptance — 77/92 decided PRs merged
0/13	Newcomer PR acceptance — no first-time contributor's PR decided in 30d
12/15	OpenSSF Scorecard: Code-Review — Found 7/8 approved changesets -- score normalized to 8

Inputs used

merged_prs	77
open_issues	4
closed_issues	27
prs_merged_7d	1
prs_decided_7d	1
prs_merged_30d	1
prs_decided_30d	1
issue_closed_ratio	0.871
closed_unmerged_prs	15
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

63Moderate

How it's scored

30/30	Ownership backing — organization-owned
0/20	Verified domain
13.5/25	Owner reach — 74 followers of rust-random
19.6/25	Track record — 10 public repos, account ~8 yr old

Inputs used

followers	74
owner_type	Organization
is_verified	no
owner_login	rust-random
public_repos	10
account_age_days	2,968

Package maintenance

100Exceptional

How it's scored

25/25	Published & resolvable — 6 package(s) on crates
35/35	Publish recency — latest publish 93 days ago
20/20	Version history — 20 published versions
20/20	Not deprecated — active, not deprecated or yanked

Inputs used

packages	rand_hc, rand_pcg, rand_sfc, rand_isaac, rand_jitter, rand_xoshiro
ecosystems	crates
any_deprecated	no
min_days_since_publish	93

Engineering Quality

Are baseline engineering and documentation practices in place?

67Good · 19% of overall

Engineering practices

68Good

How it's scored

24/24	CI workflows — 3 workflow(s)
24/24	Tests present
0/16	Linter config
0/9.6	Pre-commit hooks
0/6.4	.editorconfig
20/20	OpenSSF Scorecard: CI-Tests — 11 out of 11 merged PRs checked by a CI test -- score normalized to 10

Inputs used

has_ci	yes
has_tests	yes
has_editorconfig	no
has_linter_config	no
has_precommit_config	no

Documentation

65Good

How it's scored

30/30	README
0/25	Documentation directory
15/15	Documentation / homepage site — https://docs.rs/rand_hc
10/10	Repository description
0/10	Topics
10/10	Wiki

Inputs used

topics	—
has_wiki	yes
homepage	—
docs_site	https://docs.rs/rand_hc
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?

66Good · 16% of overall

Security posture

58Moderate

How it's scored

7.5/7.5	Binary-Artifacts — no binaries found in the repo
2.2/7.5	Branch-Protection — branch protection is not maximal on development and all release branches
2.5/2.5	CI-Tests — 11 out of 11 merged PRs checked by a CI test -- score normalized to 10
0/2.5	CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
6/7.5	Code-Review — Found 7/8 approved changesets -- score normalized to 8
2.5/2.5	Contributors — project has 3 contributing companies or organizations -- score normalized to 10
10/10	Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5	Dependency-Update-Tool — update tool detected
0/5	Fuzzing — project is not fuzzed
2.2/2.5	License — license file detected
7.5/7.5	Maintained — 16 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
0/5	Packaging — no data
0/5	Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5	SAST — SAST tool is not run on all commits -- score normalized to 0
0/5	Security-Policy — security policy file not detected
0/7.5	Signed-Releases — no data
0/7.5	Token-Permissions — detected GitHub workflow tokens with excessive permissions
6/7.5	Vulnerabilities — 2 existing vulnerabilities detected

Inputs used

source	openssf_scorecard
checks_evaluated	16
scorecard_version	v5.5.0
checks_inconclusive	2
scorecard_aggregate	5.8

Excluded from scoring (no data or not applicable): Packaging, Signed-Releases. 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
25/25	Indirect dependencies free of known advisories — no indirect dependency carries a known advisory
0/40	No advisories left outstanding — no advisory carries a publication date

Inputs used

source	osv
advisories	0
affected_packages	0
assessed_packages	1
unassessed_packages	0
affected_by_severity	none
direct_affected_packages	0

Excluded from scoring (no data or not applicable): No advisories left outstanding. Remaining weights renormalized. Matched the crates:rand_hc@0.5.1 runtime dependency closure — what installing the published package pulls in — 1 packages. 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.

55Moderate · 4% of overall

Agent context & guidance

20At Risk

How it's scored

0/45	Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15	Machine-readable docs (llms.txt)
20.4/40	Legible commit history — 36 of 94 human commits state their intent (structured subject or explanatory body)

Inputs used

has_llms_txt	no
llms_txt_url	—
legible_history_share	0.383
agent_instruction_files	—
agent_instruction_max_bytes	—

Verify loop (build / test / typecheck)

64Moderate

How it's scored

12.6/18	One-command bootstrap — Cargo.toml, benches/Cargo.toml, rand_chacha/Cargo.toml (toolchain convention, no task runner)
22/22	Automated tests
0/11	Lint / format config
11/11	Static type checking — Rust (statically typed)
10/10	Reproducible environment — lockfile
0/10	Demonstrated agent practice — no agent-authored commits among the last 100
8/8	Automated maintenance — 6 of the last 100 commits are automated dependency updates
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	—
agent_commit_share	0
toolchain_manifests	Cargo.toml, benches/Cargo.toml, rand_chacha/Cargo.toml, rand_hc/Cargo.toml, rand_isaac/Cargo.toml, rand_jitter/Cargo.toml, rand_pcg/Cargo.toml, rand_sfc/Cargo.toml, rand_xorshift/Cargo.toml, rand_xoshiro/Cargo.toml
dependency_bot_commit_share	0.06

Code legibility for models

100Exceptional

How it's scored

45/45	Type-checkable code — Rust (statically typed)
55/55	Manageable file sizes — 0/45 source files over 60KB

Inputs used

primary_language	Rust
largest_source_bytes	29,938
source_files_sampled	45
oversized_source_files	0

Key facts

54GitHub stars

22contributors

107commits, last 12 months

4days since last push

0releases

1bus factor

4open issues

crates.iopackage ecosystems

Data collection warnings

Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
Could not fetch crates package 'benches' from its registry
crates package 'rand_chacha' points at a different repository (https://github.com/rust-random/rand); excluded from ecosystem scoring

More detail

Star and fork history 0 ★ / 43 ⇿

0Stars

43Forks

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.

Each point covers 7 days.

OpenSSF Scorecard 5.8 / 10

5.8aggregate

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 · 2026-09-17 11:22 UTC

10	Binary-Artifacts	no binaries found in the repo
3	Branch-Protection	branch protection is not maximal on development and all release branches
10	CI-Tests	11 out of 11 merged PRs checked by a CI test -- score normalized to 10
0	CII-Best-Practices	no effort to earn an OpenSSF best practices badge detected
8	Code-Review	Found 7/8 approved changesets -- score normalized to 8
10	Contributors	project has 3 contributing companies or organizations -- score normalized to 10
10	Dangerous-Workflow	no dangerous workflow patterns detected
10	Dependency-Update-Tool	update tool detected
0	Fuzzing	project is not fuzzed
9	License	license file detected
10	Maintained	16 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
n/a	Packaging	packaging workflow not detected
0	Pinned-Dependencies	dependency not pinned by hash detected -- score normalized to 0
0	SAST	SAST tool is not run on all commits -- score normalized to 0
0	Security-Policy	security policy file not detected
n/a	Signed-Releases	no releases found
0	Token-Permissions	detected GitHub workflow tokens with excessive permissions
8	Vulnerabilities	2 existing vulnerabilities detected

Direct dependencies 17

Registry	Package	Version constraint	Manifest
crates.io	rand_core	`0.10.0`	rand_chacha/Cargo.toml
crates.io	ppv-lite86	`0.2.14`	rand_chacha/Cargo.toml
crates.io	serde	`1.0`	rand_chacha/Cargo.toml
crates.io	rand_core	`0.10.0`	rand_hc/Cargo.toml
crates.io	rand_core	`0.10.0`	rand_isaac/Cargo.toml
crates.io	serde	`1.0.104`	rand_isaac/Cargo.toml
crates.io	serde_arrays	`0.2.0`	rand_isaac/Cargo.toml
crates.io	rand_core	`0.10.0`	rand_jitter/Cargo.toml
crates.io	log	`0.4.4`	rand_jitter/Cargo.toml
crates.io	rand_core	`0.10`	rand_pcg/Cargo.toml
crates.io	serde	`1`	rand_pcg/Cargo.toml
crates.io	rand_core	`0.10.0`	rand_sfc/Cargo.toml
crates.io	serde	`1.0.118`	rand_sfc/Cargo.toml
crates.io	rand_core	`0.10.0`	rand_xorshift/Cargo.toml
crates.io	serde	`1.0.118`	rand_xorshift/Cargo.toml
crates.io	rand_core	`0.10.0`	rand_xoshiro/Cargo.toml
crates.io	serde	`1`	rand_xoshiro/Cargo.toml

All dependencies 131

Full resolved dependency set from the GitHub dependency graph: 10 direct and 121 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

Registry	Package	Version	Relation
crates.io	log	`—`	direct
crates.io	log	`0.4.29`	direct
crates.io	ppv-lite86	`—`	direct
crates.io	ppv-lite86	`0.2.21`	direct
crates.io	rand_core	`—`	direct
crates.io	rand_core	`0.10.1`	direct
crates.io	serde	`—`	direct
crates.io	serde	`1.0.228`	direct
crates.io	serde_arrays	`—`	direct
crates.io	serde_arrays	`0.2.0`	direct
crates.io	aho-corasick	`1.1.4`	indirect
crates.io	anes	`0.1.6`	indirect
crates.io	anstyle	`1.0.13`	indirect
crates.io	anyhow	`1.0.102`	indirect
crates.io	autocfg	`1.5.0`	indirect
crates.io	bitflags	`2.11.1`	indirect
crates.io	bumpalo	`3.19.0`	indirect
crates.io	cast	`0.3.0`	indirect
crates.io	cfg-if	`1.0.4`	indirect
crates.io	ciborium	`0.2.2`	indirect
crates.io	ciborium-io	`0.2.2`	indirect
crates.io	ciborium-ll	`0.2.2`	indirect
crates.io	clap	`4.5.51`	indirect
crates.io	clap_builder	`4.5.51`	indirect
crates.io	clap_lex	`0.7.6`	indirect
crates.io	cobs	`0.3.0`	indirect
crates.io	criterion	`0.5.1`	indirect
crates.io	criterion-cycles-per-byte	`0.6.1`	indirect
crates.io	criterion-plot	`0.5.0`	indirect
crates.io	crossbeam-deque	`0.8.6`	indirect
crates.io	crossbeam-epoch	`0.9.18`	indirect
crates.io	crossbeam-utils	`0.8.21`	indirect
crates.io	crunchy	`0.2.4`	indirect
crates.io	either	`1.15.0`	indirect
crates.io	embedded-io	`0.4.0`	indirect
crates.io	embedded-io	`0.6.1`	indirect
crates.io	equivalent	`1.0.2`	indirect
crates.io	foldhash	`0.1.5`	indirect
crates.io	getrandom	`—`	indirect
crates.io	getrandom	`0.4.2`	indirect
crates.io	half	`2.7.1`	indirect
crates.io	hashbrown	`0.15.5`	indirect
crates.io	hashbrown	`0.17.1`	indirect
crates.io	heck	`0.5.0`	indirect
crates.io	hermit-abi	`0.5.2`	indirect
crates.io	id-arena	`2.3.0`	indirect
crates.io	indexmap	`2.14.0`	indirect
crates.io	is-terminal	`0.4.17`	indirect
crates.io	itertools	`0.10.5`	indirect
crates.io	itoa	`1.0.15`	indirect
crates.io	itoa	`1.0.18`	indirect
crates.io	js-sys	`0.3.82`	indirect
crates.io	leb128fmt	`0.1.0`	indirect
crates.io	libc	`—`	indirect
crates.io	libc	`0.2.177`	indirect
crates.io	libc	`0.2.186`	indirect
crates.io	memchr	`2.7.6`	indirect
crates.io	memchr	`2.8.0`	indirect
crates.io	num-traits	`0.2.19`	indirect
crates.io	once_cell	`1.21.3`	indirect
crates.io	oorandom	`11.1.5`	indirect
crates.io	plotters	`0.3.7`	indirect
crates.io	plotters-backend	`0.3.7`	indirect
crates.io	plotters-svg	`0.3.7`	indirect
crates.io	postcard	`—`	indirect
crates.io	postcard	`1.1.3`	indirect
crates.io	prettyplease	`0.2.37`	indirect
crates.io	proc-macro2	`1.0.103`	indirect
crates.io	proc-macro2	`1.0.106`	indirect
crates.io	quote	`1.0.42`	indirect
crates.io	quote	`1.0.45`	indirect
crates.io	r-efi	`6.0.0`	indirect
crates.io	rayon	`1.11.0`	indirect
crates.io	rayon-core	`1.13.0`	indirect
crates.io	regex	`1.12.2`	indirect
crates.io	regex-automata	`0.4.13`	indirect
crates.io	regex-syntax	`0.8.8`	indirect
crates.io	rustversion	`1.0.22`	indirect
crates.io	ryu	`1.0.20`	indirect
crates.io	same-file	`1.0.6`	indirect
crates.io	semver	`1.0.28`	indirect
crates.io	serde_core	`1.0.228`	indirect
crates.io	serde_derive	`1.0.228`	indirect
crates.io	serde_json	`—`	indirect
crates.io	serde_json	`1.0.145`	indirect
crates.io	serde_json	`1.0.149`	indirect
crates.io	syn	`2.0.110`	indirect
crates.io	syn	`2.0.117`	indirect
crates.io	thiserror	`2.0.18`	indirect
crates.io	thiserror-impl	`2.0.18`	indirect
crates.io	tinytemplate	`1.2.1`	indirect
crates.io	unicode-ident	`1.0.22`	indirect
crates.io	unicode-ident	`1.0.24`	indirect
crates.io	unicode-xid	`0.2.6`	indirect
crates.io	walkdir	`2.5.0`	indirect
crates.io	wasip2	`1.0.1+wasi-0.2.4`	indirect
crates.io	wasip3	`0.4.0+wasi-0.3.0-rc-2026-01-06`	indirect
crates.io	wasm-bindgen	`0.2.105`	indirect
crates.io	wasm-bindgen-macro	`0.2.105`	indirect
crates.io	wasm-bindgen-macro-support	`0.2.105`	indirect
crates.io	wasm-bindgen-shared	`0.2.105`	indirect
crates.io	wasm-encoder	`0.244.0`	indirect
crates.io	wasm-metadata	`0.244.0`	indirect
crates.io	wasmparser	`0.244.0`	indirect
crates.io	web-sys	`0.3.82`	indirect
crates.io	winapi-util	`0.1.11`	indirect
crates.io	windows-link	`0.2.1`	indirect
crates.io	windows-sys	`—`	indirect
crates.io	windows-sys	`0.59.0`	indirect
crates.io	windows-sys	`0.61.2`	indirect
crates.io	windows-targets	`0.52.6`	indirect
crates.io	windows_aarch64_gnullvm	`0.52.6`	indirect
crates.io	windows_aarch64_msvc	`0.52.6`	indirect
crates.io	windows_i686_gnu	`0.52.6`	indirect
crates.io	windows_i686_gnullvm	`0.52.6`	indirect
crates.io	windows_i686_msvc	`0.52.6`	indirect
crates.io	windows_x86_64_gnu	`0.52.6`	indirect
crates.io	windows_x86_64_gnullvm	`0.52.6`	indirect
crates.io	windows_x86_64_msvc	`0.52.6`	indirect
crates.io	wit-bindgen	`0.46.0`	indirect
crates.io	wit-bindgen	`0.51.0`	indirect
crates.io	wit-bindgen-core	`0.51.0`	indirect
crates.io	wit-bindgen-rust	`0.51.0`	indirect
crates.io	wit-bindgen-rust-macro	`0.51.0`	indirect
crates.io	wit-component	`0.244.0`	indirect
crates.io	wit-parser	`0.244.0`	indirect
crates.io	zerocopy	`0.8.27`	indirect
crates.io	zerocopy	`0.8.48`	indirect
crates.io	zerocopy-derive	`0.8.27`	indirect
crates.io	zerocopy-derive	`0.8.48`	indirect
crates.io	zmij	`1.0.21`	indirect

Dependency advisories 0

Installing crates:rand_hc@0.5.1 pulls in 1 packages, direct and transitive: 0 carry known advisories, of which 0 are direct dependencies.

No known advisories affect the assessed dependencies.

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

Feedback

Spotted something off in this report, or have thoughts to share? Wrong measurements, missed tooling, ideas, questions — anything is welcome. Every message is read and gets a response.

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 v2.10.0, schema v0.34.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics — crates.io.

Software health index

Score profile

Ownership

Package ecosystems

Metrics by category

Key facts

Data collection warnings

More detail

Feedback

Related records