Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-03 03:28 UTC

metadevpro / ts-pegjs

Plugin for pegjs to generate TypeScript parsers.

TypeScriptMIT★ 161 stars⑂ 40 forkssince Jul 2017View on GitHub ↗
KindLibraryCommand-line toolPluginhow this is determined
#pegjs#pegjs-plugin#typescript#peg#parser-generator

metadevpro/ts-pegjs holds a health index of 65 out of 100, placing it in the Good band. It scores highest on Engineering Quality (67/100) and lowest on Vitality (48/100). It was last updated 21 days ago. A single contributor accounts 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 60 is calibrated to 65 on the published index scale (record calibration 2026-08-02).

Ownership

metadevOrganization
20 followers28 public repossince Dec 2016

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npmts-pegjs4.2.2132,0934535 days agopeggypegjsplugintstypescriptparsergenerator

Metrics by category

Vitality

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

48Weak · 21% of overall

Development activity

51Moderate
How it's scored
28.8/36Push recency — last push 21 days ago
2.1/36Commit cadence — 3/52 weeks with commits
10/18Commit volume — 12 commits in the last year
10/10OpenSSF Scorecard: Maintained — 12 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year12
human_commit_share0.96
days_since_last_push21
active_weeks_last_year3

Release discipline

44Weak
How it's scored
27/27Ships releases — 4 releases published
0/36Release recency — latest release 1,339 days ago
12.6/27Release cadence — a release every ~243.9 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count4
latest_release_tagv3.0.0
releases_from_tagsno
days_since_latest_release1,339
mean_days_between_releases243.9
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?

59Moderate · 17% of overall

Popularity & adoption

51Moderate
How it's scored
35.8/60Stars — 161 stars
13.3/25Forks — 40 forks
1.7/15Watchers — 3 watchers
Inputs used
forks40
stars161
watchers3
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

50Moderate
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (MIT)
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges3
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_servicesbadge.fury.io, snyk.io, travis-ci.org
has_pull_request_templateno

Ecosystem adoption (downloads)

85Excellent
How it's scored
68.3/80Monthly downloads — 132,093 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagests-pegjs
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads132,093
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?

65Good · 23% of overall

Maintainer resilience (bus factor)

38Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
5.8/22.5Commit distribution — top contributor authored 74% of commits
13.5/13.5Contributor breadth — 21 contributors
10/10OpenSSF Scorecard: Contributors — project has 3 contributing companies or organizations -- score normalized to 10
Inputs used
bus_factor1
contributors_sampled21
top_contributor_share0.743

Issue & PR responsiveness

71Good
How it's scored
35.2/42Issue resolution — 84% of issues closed
23.2/30PR acceptance — 58/75 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
3/15OpenSSF Scorecard: Code-Review — Found 4/18 approved changesets -- score normalized to 2
Inputs used
merged_prs58
open_issues10
closed_issues52
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio0.839
closed_unmerged_prs17
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.

Ownership & stewardship

62Moderate
How it's scored
30/30Ownership backing — organization-owned
0/20Verified domain
9.5/25Owner reach — 20 followers of metadevpro
22.6/25Track record — 28 public repos, account ~9 yr old
Inputs used
followers20
owner_typeOrganization
is_verifiedno
owner_loginmetadevpro
public_repos28
account_age_days3,562

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 35 days ago
20/20Version history — 45 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagests-pegjs
ecosystemsnpm
any_deprecatedno
min_days_since_publish35

Engineering Quality

Are baseline engineering and documentation practices in place?

67Good · 19% of overall

Engineering practices

72Good
How it's scored
24/24CI workflows — 1 workflow(s)
24/24Tests present
16/16Linter config — eslint.config.mjs, package.json ("prettier")
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
2/20OpenSSF Scorecard: CI-Tests — 1 out of 9 merged PRs checked by a CI test -- score normalized to 1
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configyes
has_precommit_configno

Documentation

60Moderate
How it's scored
30/30README
0/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
10/10Topics — 5 topics
10/10Wiki
Inputs used
topicspegjs, pegjs-plugin, typescript, peg, parser-generator
has_wikiyes
homepage—
docs_site—
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

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

62Moderate · 16% of overall

Security posture

52Moderate
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
0/7.5Branch-Protection — branch protection not enabled on development/release branches
0.2/2.5CI-Tests — 1 out of 9 merged PRs checked by a CI test -- score normalized to 1
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
1.5/7.5Code-Review — Found 4/18 approved changesets -- score normalized to 2
2.5/2.5Contributors — project has 3 contributing companies or organizations -- score normalized to 10
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 — 12 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
0/5Packaging — no data
1.5/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 3
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
7.5/7.5Vulnerabilities — 0 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate5.2
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_packages13
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:ts-pegjs@4.2.2 runtime dependency closure — what installing the published package pulls in — 13 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.

63Moderate · 4% of overall

Agent context & guidance

22At Risk
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
21.7/40Legible commit history — 39 of 96 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.406
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

65Good
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.mjs, package.json ("prettier")
11/11Static type checking — tsconfig.json
10/10Reproducible environment — lockfile
0/10Demonstrated agent practice — no agent-authored commits among the last 100
8/8Automated maintenance — 4 of the last 100 commits are automated dependency updates
3/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 3
Inputs used
has_nixno
has_testsyes
lockfilespackage-lock.json
has_dockerfileno
typed_languageyes
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configstsconfig.json
agent_commit_share0
toolchain_manifests—
dependency_bot_commit_share0.04

Code legibility for models

100Exceptional
How it's scored
45/45Type-checkable code — TypeScript (statically typed)
55/55Manageable file sizes — 0/20 source files over 60KB
Inputs used
primary_languageTypeScript
largest_source_bytes14,850
source_files_sampled20
oversized_source_files0

Machine-readable interfaces

100Exceptional
How it's scored
0/40API schema (OpenAPI/GraphQL/proto) — not applicable to this kind of software
0/20MCP server — not applicable to this kind of software
40/40Runnable examples — examples
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

161GitHub stars
21contributors
12commits, last 12 months
21days since last push
4releases
1bus factor
10open 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 ★ / 40 ⇿
0Stars
40Forks
4Releases

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.

0102030404022017-102021-092025-07
Major 1Minor 1Patch 2

Each point covers 8 days.

OpenSSF Scorecard 5.2 / 10
5.2aggregate

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 · 2026-09-03 03:28 UTC

10Binary-Artifactsno binaries found in the repo
0Branch-Protectionbranch protection not enabled on development/release branches
1CI-Tests1 out of 9 merged PRs checked by a CI test -- score normalized to 1
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
2Code-ReviewFound 4/18 approved changesets -- score normalized to 2
10Contributorsproject has 3 contributing companies or organizations -- score normalized to 10
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained12 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
3Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 3
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
10Vulnerabilities0 existing vulnerabilities detected
Direct dependencies 3
RegistryPackageVersion constraintManifest
npmprettier^3.9.6package.json
npmsynckit^0.11.13package.json
npmts-morph^28.0.0package.json
All dependencies 204

Full resolved dependency set from the GitHub dependency graph: 3 direct and 201 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npmprettier3.9.6direct
npmsynckit0.11.13direct
npmts-morph28.0.0direct
npm@eslint-community/eslint-utils4.10.1indirect
npm@eslint-community/regexpp4.12.2indirect
npm@eslint/config-array0.23.5indirect
npm@eslint/config-helpers0.7.0indirect
npm@eslint/core1.2.1indirect
npm@eslint/js10.0.1indirect
npm@eslint/object-schema3.0.5indirect
npm@eslint/plugin-kit0.7.2indirect
npm@humanfs/core0.19.2indirect
npm@humanfs/node0.16.8indirect
npm@humanfs/types0.15.0indirect
npm@humanwhocodes/module-importer1.0.1indirect
npm@humanwhocodes/retry0.4.3indirect
npm@jridgewell/gen-mapping0.3.13indirect
npm@jridgewell/remapping2.3.5indirect
npm@jridgewell/resolve-uri3.1.2indirect
npm@jridgewell/sourcemap-codec1.5.5indirect
npm@jridgewell/trace-mapping0.3.31indirect
npm@oxc-project/types0.143.0indirect
npm@pkgr/core0.3.6indirect
npm@rolldown/binding-android-arm641.2.3indirect
npm@rolldown/binding-darwin-arm641.2.3indirect
npm@rolldown/binding-darwin-x641.2.3indirect
npm@rolldown/binding-freebsd-x641.2.3indirect
npm@rolldown/binding-linux-arm-gnueabihf1.2.3indirect
npm@rolldown/binding-linux-arm64-gnu1.2.3indirect
npm@rolldown/binding-linux-arm64-musl1.2.3indirect
npm@rolldown/binding-linux-ppc64-gnu1.2.3indirect
npm@rolldown/binding-linux-s390x-gnu1.2.3indirect
npm@rolldown/binding-linux-x64-gnu1.2.3indirect
npm@rolldown/binding-linux-x64-musl1.2.3indirect
npm@rolldown/binding-openharmony-arm641.2.3indirect
npm@rolldown/binding-win32-arm64-msvc1.2.3indirect
npm@rolldown/binding-win32-x64-msvc1.2.3indirect
npm@rolldown/pluginutils1.0.1indirect
npm@rollup/pluginutils5.4.0indirect
npm@standard-schema/spec1.1.0indirect
npm@ts-morph/common0.29.0indirect
npm@types/chai5.2.3indirect
npm@types/deep-eql4.0.2indirect
npm@types/esrecurse4.3.1indirect
npm@types/estree1.0.9indirect
npm@types/json-schema7.0.15indirect
npm@types/node26.2.0indirect
npm@typescript-eslint/eslint-plugin8.67.0indirect
npm@typescript-eslint/parser8.67.0indirect
npm@typescript-eslint/project-service8.67.0indirect
npm@typescript-eslint/scope-manager8.67.0indirect
npm@typescript-eslint/tsconfig-utils8.67.0indirect
npm@typescript-eslint/type-utils8.67.0indirect
npm@typescript-eslint/types8.67.0indirect
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npm@volar/typescript2.4.28indirect
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npmcommander10.0.1indirect
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npmconfbox0.1.8indirect
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npmflatted3.4.3indirect
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npmglob13.0.6indirect
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npmglobals17.10.0indirect
npmignore5.3.2indirect
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npmis-extglob2.1.1indirect
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npmisexe2.0.0indirect
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npmlightningcss-android-arm641.33.0indirect
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npmms2.1.3indirect
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npmp-limit3.1.0indirect
npmp-locate5.0.0indirect
npmpackage-json-from-dist1.0.1indirect
npmpath-browserify1.0.1indirect
npmpath-exists4.0.0indirect
npmpath-key3.1.1indirect
npmpath-scurry2.0.2indirect
npmpathe2.0.3indirect
npmpeggy3.0.2indirect
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npmrimraf6.1.3indirect
npmrolldown1.2.3indirect
npmrollup-plugin-add-shebang0.3.1indirect
npmrollup-pluginutils2.8.2indirect
npmsemver7.8.5indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmsiginfo2.0.0indirect
npmsource-map-generator0.8.0indirect
npmsource-map-js1.2.1indirect
npmsourcemap-codec1.4.8indirect
npmstackback0.0.2indirect
npmstd-env4.2.0indirect
npmtinybench2.9.0indirect
npmtinyexec1.2.4indirect
npmtinyglobby0.2.17indirect
npmtinyrainbow3.1.1indirect
npmts-api-utils2.5.0indirect
npmtype-check0.4.0indirect
npmtypescript6.0.3indirect
npmufo1.6.4indirect
npmundici-types8.3.0indirect
npmunplugin2.3.11indirect
npmunplugin-dts1.0.3indirect
npmuri-js4.4.1indirect
npmvite8.2.1indirect
npmvite-plugin-dts5.0.3indirect
npmvitest4.1.10indirect
npmvscode-uri3.1.0indirect
npmwebpack-virtual-modules0.6.2indirect
npmwhich2.0.2indirect
npmwhy-is-node-running2.3.0indirect
npmword-wrap1.2.5indirect
npmyocto-queue0.1.0indirect
Dependency advisories 0

Installing npm:ts-pegjs@4.2.2 pulls in 13 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

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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.