Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-05 04:55 UTC

antlr / antlr4

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Java · C++ · C#BSD-3-Clause★ 18,965 stars⑂ 3,463 forkssince Feb 2010View on GitHub ↗
KindPluginLibraryhow this is determined

antlr/antlr4 holds a health index of 65 out of 100, placing it in the Good band. It scores highest on Community & Adoption (92/100) and lowest on Vitality (31/100). It was last updated 169 days ago. 2 contributors account for most of its recent work.

65
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.

65
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 66 is calibrated to 77 on the published index scale (record calibration 2026-08-02).

Ownership

Antlr ProjectOrganization
726 followers34 public repossince May 2009

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publish
Mavenorg.antlr:antlr44.13.2-31731 days ago
Mavenorg.antlr:antlr4-tool-testsuite4.13.2-23731 days ago
Mavenorg.antlr:antlr4-runtime-testsuite4.13.2-23731 days ago
Mavenorg.antlr:antlr4-maven-plugin4.13.2-31731 days ago

Metrics by category

Vitality

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

31At Risk · 21% of overall
How it's scored
9.9/36Push recencylast push 169 days ago
4.2/36Commit cadence6/52 weeks with commits
7.6/18Commit volume6 commits in the last year
0/10OpenSSF Scorecard: Maintained0 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 0
Inputs used
commits_last_year6
human_commit_share1
days_since_last_push169
active_weeks_last_year6
How it's scored
27/27Ships releases31 releases published
0/36Release recencylatest release 731 days ago
12.6/27Release cadencea release every ~137.9 days
0/10OpenSSF Scorecard: Signed-Releasesno data
Inputs used
releases_count31
latest_release_tag4.13.2
releases_from_tagsno
days_since_latest_release731
mean_days_between_releases137.9
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?

92Excellent · 17% of overall
How it's scored
60/60Stars18,965 stars
25/25Forks3,463 forks
14.3/15Watchers367 watchers
Inputs used
forks3,463
stars18,965
watchers367
growth_stateorganic
growth_factor_pct100

Community health

85Excellent
How it's scored
22.5/22.5README
22.5/22.5Licenserecognized license (BSD-3-Clause)
18/18CONTRIBUTING guide
0/13.5Code of conduct
7.2/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges7
has_contributingyes
has_issue_templateyes
has_code_of_conductno
readme_badge_servicesgithub.com, shields.io
has_pull_request_templateyes

Sustainability & Governance

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

73Good · 23% of overall
How it's scored
25.2/54Bus factor2 contributor(s) cover half of all commits
12.8/22.5Commit distributiontop contributor authored 43% of commits
13.5/13.5Contributor breadth100 contributors
10/10OpenSSF Scorecard: Contributorsproject has 25 contributing companies or organizations
Inputs used
bus_factor2
contributors_sampled100
top_contributor_share0.432
How it's scored
26.3/42Issue resolution63% of issues closed
22.9/30PR acceptance1,534/2,008 decided PRs merged
0/13Newcomer PR acceptanceno first-time contributor's PR decided in 30d
12/15OpenSSF Scorecard: Code-ReviewFound 26/29 approved changesets -- score normalized to 8
Inputs used
merged_prs1,534
open_issues904
closed_issues1,517
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio0.627
closed_unmerged_prs474
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 backingorganization-owned
0/20Verified domainverified-domain status not read for this organization
20.6/25Owner reach726 followers of antlr
23.2/25Track record34 public repos, account ~17 yr old
Inputs used
followers726
owner_typeOrganization
is_verified
owner_loginantlr
public_repos34
account_age_days6,302
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.
How it's scored
25/25Published & resolvable4 package(s) on maven
4/35Publish recencylatest publish 731 days ago
20/20Version history31 published versions
20/20Not deprecatedactive, not deprecated or yanked
Inputs used
packagesorg.antlr:antlr4, org.antlr:antlr4-tool-testsuite, org.antlr:antlr4-runtime-testsuite, org.antlr:antlr4-maven-plugin
ecosystemsmaven
any_deprecatedno
min_days_since_publish731

Engineering Quality

Are baseline engineering and documentation practices in place?

80Excellent · 19% of overall
How it's scored
24/24CI workflows1 workflow(s)
24/24Tests present
16/16Linter config.eslintrc.yml
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
4/20OpenSSF Scorecard: CI-Tests7 out of 29 merged PRs checked by a CI test -- score normalized to 2
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configyes
has_precommit_configno

Documentation

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage sitehttp://antlr.org
10/10Repository description
10/10Topics16 topics
0/10Wiki
Inputs used
topicsparsing, parser-generator, antlr, antlr4, java, grammar, python, parse, language-recognition, javascript, csharp, swift, cpp, golang, php, dart
has_wikino
homepagehttp://antlr.org
docs_sitehttp://antlr.org
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

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

55Moderate · 16% of overall
How it's scored
6.8/7.5Binary-Artifactsbinaries present in source code
0/7.5Branch-Protectionbranch protection not enabled on development/release branches
0.5/2.5CI-Tests7 out of 29 merged PRs checked by a CI test -- score normalized to 2
0/2.5CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
6/7.5Code-ReviewFound 26/29 approved changesets -- score normalized to 8
2.5/2.5Contributorsproject has 25 contributing companies or organizations
10/10Dangerous-Workflowno dangerous workflow patterns detected
0/7.5Dependency-Update-Toolno update tool detected
5/5Fuzzingproject is fuzzed
2.5/2.5Licenselicense file detected
0/7.5Maintained0 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 0
0/5Packagingno data
0/5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0/5SASTSAST tool is not run on all commits -- score normalized to 0
0/5Security-Policysecurity policy file not detected
0/7.5Signed-Releasesno data
7.5/7.5Token-PermissionsGitHub workflow tokens follow principle of least privilege
0/7.5Vulnerabilities32 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate4.4
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 advisoriesno direct dependency carries a known advisory
25/25Indirect dependencies free of known advisoriesno indirect dependency carries a known advisory
0/40No advisories left outstandingno advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages5
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 maven:org.antlr:antlr4@4.13.2 runtime dependency closure — what installing the published package pulls in — 5 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.

68Good · 4% of overall
How it's scored
0/45Agent instructionsno CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
28.8/40Legible commit history54 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url
legible_history_share0.54
agent_instruction_files
agent_instruction_max_bytes
How it's scored
18/18One-command bootstrapruntime/JavaScript/spec/rewriter/Makefile
22/22Automated tests
11/11Lint / format config.eslintrc.yml
11/11Static type checkingruntime-testsuite/resources/org/antlr/v4/test/runtime/helpers/tsconfig.json, runtime/JavaScript/tsconfig.json
10/10Reproducible environmentDockerfile, lockfile
0/10Demonstrated agent practiceno agent-authored commits among the last 100
0/8Automated maintenanceno automated dependency updates observed
0/10OpenSSF Scorecard: Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixno
has_testsyes
lockfilesgo.sum, package-lock.json
has_dockerfileyes
typed_languageyes
bootstrap_filesruntime/JavaScript/spec/rewriter/Makefile
has_devcontainerno
has_linter_configyes
typecheck_configsruntime-testsuite/resources/org/antlr/v4/test/runtime/helpers/tsconfig.json, runtime/JavaScript/tsconfig.json
agent_commit_share0
toolchain_manifestsantlr4-maven-plugin/pom.xml, antlr4-maven-plugin/src/test/projects/dependencyRemoved/pom.xml, antlr4-maven-plugin/src/test/projects/importTokens/pom.xml, antlr4-maven-plugin/src/test/projects/importsCustom/pom.xml, antlr4-maven-plugin/src/test/projects/importsStandard/pom.xml, pom.xml, runtime-testsuite/pom.xml, runtime/CSharp/src/Antlr4.csproj, runtime/CSharp/tests/issue-2693/Test.csproj, runtime/CSharp/tests/issue-3079/Test.csproj, runtime/Go/antlr/v4/go.mod, runtime/Java/pom.xml, tool-testsuite/pom.xml, tool/pom.xml
dependency_bot_commit_share0
How it's scored
45/45Type-checkable codeJava (statically typed)
54.7/55Manageable file sizes9/1,601 source files over 60KB
Inputs used
primary_languageJava
largest_source_bytes352,457
source_files_sampled1,601
oversized_source_files9
How it's scored
0/40API schema (OpenAPI/GraphQL/proto)not applicable to this kind of software
0/20MCP servernot applicable to this kind of software
40/40Runnable examplesexamples
Inputs used
example_dirsexamples
has_mcp_signalno
api_schema_files
interfaces_expected_of
Excluded from scoring (no data or not applicable): API schema (OpenAPI/GraphQL/proto), MCP server. Remaining weights renormalized.

Key facts

18,965GitHub stars
100contributors
6commits, last 12 months
169days since last push
31releases
2bus factor
904open issues
Mavenpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • Star history carried forward from 2026-07-20: GitHub restricted the stargazers API to repository admins, so it can no longer be collected. The repository has 18965 stars today.

More detail

Star and fork history 18,958 ★ / 3,463 ⇿
18,958Stars
3,463Forks
6Releases

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.

Only the most recent history is shown — this repository exceeds the collection window, so the earliest history is not captured.

Star history is shown as collected on 2026-07-20. GitHub restricted the stargazers API to repository administrators in July 2026, so this series can no longer be extended; the current star total above remains live.

04,0008,00012,00016,00020,00018,9583,463272022-052024-062026-08
Major 0Minor 3Patch 3

Each point covers 4 days.

OpenSSF Scorecard 4.4 / 10
4.4aggregate

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 · 2026-08-05 04:55 UTC

9Binary-Artifactsbinaries present in source code
0Branch-Protectionbranch protection not enabled on development/release branches
2CI-Tests7 out of 29 merged PRs checked by a CI test -- score normalized to 2
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
8Code-ReviewFound 26/29 approved changesets -- score normalized to 8
10Contributorsproject has 25 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
10Fuzzingproject is fuzzed
10Licenselicense file detected
0Maintained0 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 0
n/aPackagingpackaging workflow not detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0SASTSAST tool is not run on all commits -- score normalized to 0
0Security-Policysecurity policy file not detected
n/aSigned-Releasesno releases found
10Token-PermissionsGitHub workflow tokens follow principle of least privilege
0Vulnerabilities32 existing vulnerabilities detected
Direct dependencies 12
RegistryPackageVersion constraintManifest
Mavenorg.codehaus.plexus:plexus-compiler-api2.12.1antlr4-maven-plugin/pom.xml
Mavenorg.sonatype.plexus:plexus-build-api0.0.7antlr4-maven-plugin/pom.xml
Mavenorg.antlr:antlr4${project.version}antlr4-maven-plugin/pom.xml
Mavenorg.slf4j:slf4j-api2.0.0antlr4-maven-plugin/pom.xml
Mavenorg.slf4j:slf4j-simple2.0.0antlr4-maven-plugin/pom.xml
Mavenorg.openjdk.jol:jol-core0.16runtime-testsuite/pom.xml
Mavenorg.antlr:antlr4-runtime${project.version}tool/pom.xml
Mavenorg.antlr:antlr-runtime3.5.3tool/pom.xml
Mavenorg.antlr:ST44.3.4tool/pom.xml
Mavenorg.abego.treelayout:org.abego.treelayout.core1.0.3tool/pom.xml
Mavencom.ibm.icu:icu4j72.1tool/pom.xml
Mavenorg.twdata.maven:mojo-executor2.1.0tool/pom.xml
All dependencies 449

Full resolved dependency set from the GitHub dependency graph: 12 direct and 437 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
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Dependency advisories 0

Installing maven:org.antlr:antlr4@4.13.2 pulls in 5 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 v0.31.0 — full methodology · metrics wiki.

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