Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-16 21:14 UTC

AssemblyScript / assemblyscript

A TypeScript-like language for WebAssembly.

WebAssembly · TypeScriptApache-2.0★ 18,016 stars⑂ 690 forkssince Sep 2017View on GitHub ↗
KindLibraryCommand-line toolhow this is determined

AssemblyScript/assemblyscript holds a health index of 90 out of 100, placing it in the Excellent band. It scores highest on Community & Adoption (95/100) and lowest on Security (56/100). It was last updated 2 days ago. A single contributor accounts for most of its recent work.

90
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.

90
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 76 is calibrated to 90 on the published index scale (record calibration 2026-08-02).

Ownership

The AssemblyScript ProjectOrganization · verified domain
898 followers17 public repossince May 2017

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npmassemblyscript0.28.20592,77829256 days agotypescriptwebassemblycompilerassemblyscriptwasm

Metrics by category

Vitality

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

78Good · 21% of overall
How it's scored
36/36Push recency — last push 2 days ago
10.4/36Commit cadence — 15/52 weeks with commits
13.6/18Commit volume — 32 commits in the last year
4/10OpenSSF Scorecard: Maintained — 3 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 4
Inputs used
commits_last_year32
human_commit_share0.94
days_since_last_push2
active_weeks_last_year15

Release discipline

100Exceptional
How it's scored
27/27Ships releases — 100 releases published
36/36Release recency — latest release 56 days ago
27/27Release cadence — a release every ~12.9 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count100
latest_release_tagv0.28.20
releases_from_tagsno
days_since_latest_release56
mean_days_between_releases12.9
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?

95Exceptional · 17% of overall
How it's scored
60/60Stars — 18,016 stars
23.7/25Forks — 690 forks
12.7/15Watchers — 194 watchers
Inputs used
forks690
stars18,016
watchers194
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_badges4
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_servicesshields.io
has_pull_request_templateyes
How it's scored
77/80Monthly downloads — 592,778 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagesassemblyscript
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads592,778
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?

76Good · 23% of overall
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
9.4/22.5Commit distribution — top contributor authored 58% of commits
13.5/13.5Contributor breadth — 71 contributors
10/10OpenSSF Scorecard: Contributors — project has 24 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled71
top_contributor_share0.581
How it's scored
36.9/42Issue resolution — 88% of issues closed
22.4/30PR acceptance — 1,123/1,505 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
10.5/15OpenSSF Scorecard: Code-Review — Found 20/27 approved changesets -- score normalized to 7
Inputs used
merged_prs1,123
open_issues180
closed_issues1,303
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio0.879
closed_unmerged_prs382
first_time_authors_30d0
first_time_prs_merged_30d0
first_time_prs_decided_30d0
Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.
How it's scored
30/30Ownership backing — organization-owned
20/20Verified domain
21.2/25Owner reach — 898 followers of AssemblyScript
21.1/25Track record — 17 public repos, account ~9 yr old
Inputs used
followers898
owner_typeOrganization
is_verifiedyes
owner_loginAssemblyScript
public_repos17
account_age_days3,402

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 56 days ago
20/20Version history — 292 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesassemblyscript
ecosystemsnpm
any_deprecatedno
min_days_since_publish56

Engineering Quality

Are baseline engineering and documentation practices in place?

79Good · 19% of overall
How it's scored
24/24CI workflows — 4 workflow(s)
24/24Tests present
16/16Linter config — eslint.config.js
0/9.6Pre-commit hooks
0/6.4.editorconfig
18/20OpenSSF Scorecard: CI-Tests — 29 out of 30 merged PRs checked by a CI test -- score normalized to 9
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configno
How it's scored
30/30README
0/25Documentation directory
15/15Documentation / homepage site — https://www.assemblyscript.org
10/10Repository description
10/10Topics — 5 topics
10/10Wiki
Inputs used
topicstypescript, webassembly, compiler, assemblyscript, wasm
has_wikiyes
homepagehttps://www.assemblyscript.org
docs_sitehttps://www.assemblyscript.org
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

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

56Moderate · 16% of overall
How it's scored
6/7.5Binary-Artifacts — binaries present in source code
0/7.5Branch-Protection — branch protection not enabled on development/release branches
2.2/2.5CI-Tests — 29 out of 30 merged PRs checked by a CI test -- score normalized to 9
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
5.2/7.5Code-Review — Found 20/27 approved changesets -- score normalized to 7
2.5/2.5Contributors — project has 24 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
3/7.5Maintained — 3 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 4
0/5Packaging — no data
1/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 2
0/5SAST — SAST tool is not run on all commits -- score normalized to 0
0/5Security-Policy — security policy file not detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
1.5/7.5Vulnerabilities — 8 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate4.5
Excluded from scoring (no data or not applicable): Packaging, 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
25/25Indirect dependencies free of known advisories — no indirect dependency carries a known advisory
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages2
unassessed_packages0
affected_by_severitynone
direct_affected_packages0
Excluded from scoring (no data or not applicable): No advisories left outstanding. Remaining weights renormalized. Matched the npm:assemblyscript@0.28.20 runtime dependency closure — what installing the published package pulls in — 2 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.

59Moderate · 4% of overall
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
40/40Legible commit history — 94 of 94 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share1
agent_instruction_files—
agent_instruction_max_bytes—
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.js
11/11Static type checking — cli/tsconfig.json, lib/loader/tests/assembly/tsconfig.json, src/extra/tsconfig.json, src/glue/tsconfig.json, src/glue/wasm/tsconfig.json, src/tsconfig.json, std/assembly/shared/tsconfig.json, std/assembly/tsconfig.json, tests/allocators/default/assembly/tsconfig.json, tests/allocators/stub/assembly/tsconfig.json, tests/compiler/node_modules/tsconfig.json, tests/compiler/tsconfig.json, tests/parser/tsconfig.json, util/tsconfig.json
10/10Reproducible environment — lockfile
0/10Demonstrated agent practice — no agent-authored commits among the last 100
8/8Automated maintenance — 6 of the last 100 commits are automated dependency updates
2/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 2
Inputs used
has_nixno
has_testsyes
lockfilespackage-lock.json
has_dockerfileno
typed_languageno
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configscli/tsconfig.json, lib/loader/tests/assembly/tsconfig.json, src/extra/tsconfig.json, src/glue/tsconfig.json, src/glue/wasm/tsconfig.json, src/tsconfig.json, std/assembly/shared/tsconfig.json, std/assembly/tsconfig.json, tests/allocators/default/assembly/tsconfig.json, tests/allocators/stub/assembly/tsconfig.json, tests/compiler/node_modules/tsconfig.json, tests/compiler/tsconfig.json, tests/parser/tsconfig.json, util/tsconfig.json
agent_commit_share0
toolchain_manifests—
dependency_bot_commit_share0.06
How it's scored
27/45Type-checkable code — WebAssembly with type-check config (cli/tsconfig.json, lib/loader/tests/assembly/tsconfig.json, src/extra/tsconfig.json, src/glue/tsconfig.json, src/glue/wasm/tsconfig.json, src/tsconfig.json, std/assembly/shared/tsconfig.json, std/assembly/tsconfig.json, tests/allocators/default/assembly/tsconfig.json, tests/allocators/stub/assembly/tsconfig.json, tests/compiler/node_modules/tsconfig.json, tests/compiler/tsconfig.json, tests/parser/tsconfig.json, util/tsconfig.json)
53.6/55Manageable file sizes — 14/557 source files over 60KB
Inputs used
primary_languageWebAssembly
largest_source_bytes420,717
source_files_sampled557
oversized_source_files14

Key facts

18,016GitHub stars
71contributors
32commits, last 12 months
2days since last push
100releases
1bus factor
180open issues
npmpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

More detail

Star and fork history 0 ★ / 690 ⇿
0Stars
690Forks
100Releases

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.

0125250375500625750676112017-102022-032026-09
Major 0Minor 8Patch 92

Each point covers 9 days.

OpenSSF Scorecard 4.5 / 10
4.5aggregate

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 · 2026-09-16 21:14 UTC

8Binary-Artifactsbinaries present in source code
0Branch-Protectionbranch protection not enabled on development/release branches
9CI-Tests29 out of 30 merged PRs checked by a CI test -- score normalized to 9
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
7Code-ReviewFound 20/27 approved changesets -- score normalized to 7
10Contributorsproject has 24 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
4Maintained3 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 4
n/aPackagingpackaging workflow not detected
2Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 2
0SASTSAST tool is not run on all commits -- score normalized to 0
0Security-Policysecurity policy file not detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
2Vulnerabilities8 existing vulnerabilities detected
Direct dependencies 2
RegistryPackageVersion constraintManifest
npmbinaryen131.0.0-nightly.20260721package.json
npmlong^5.2.4package.json
All dependencies 192

Full resolved dependency set from the GitHub dependency graph: 2 direct and 190 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
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npmsemver6.3.0indirect
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npmsupports-color5.5.0indirect
npmtinyglobby0.2.17indirect
npmto-fast-properties2.0.0indirect
npmts-api-utils2.5.0indirect
npmtype-check0.4.0indirect
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Dependency advisories 0

Installing npm:assemblyscript@0.28.20 pulls in 2 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.

The message is kept through sign-in.

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 — npm.