Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-05 12:51 UTC

lichess-org / pgn-viewer

PGN viewer widget

TypeScript · SCSSGPL-3.0★ 152 stars⑂ 42 forkssince Jul 2022View on GitHub ↗
KindLibraryhow this is determined
#chess#lichess#pgn#viewer#javascript#typescript

lichess-org/pgn-viewer holds a health index of 81 out of 100, placing it in the Excellent band. It scores highest on Vitality (79/100) and lowest on AI Readiness (44/100). It was last updated 11 days ago. A single contributor accounts for most of its recent work.

81
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.

81
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 69 is calibrated to 81 on the published index scale (record calibration 2026-08-02).

Ownership

LichessOrganization
4,248 followers80 public repossince Dec 2015

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npm@lichess-org/pgn-viewer2.6.26,0041411 days agochesslichessgamepgnviewertypescript

Metrics by category

Vitality

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

79Good · 21% of overall

Development activity

65Good
How it's scored
28.8/36Push recency — last push 11 days ago
11.1/36Commit cadence — 16/52 weeks with commits
17.5/18Commit volume — 88 commits in the last year
8/10OpenSSF Scorecard: Maintained — 10 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 8
Inputs used
commits_last_year88
human_commit_share1
days_since_last_push11
active_weeks_last_year16

Release discipline

100Exceptional
How it's scored
27/27Ships releases — 14 releases published
36/36Release recency — latest release 11 days ago
27/27Release cadence — a release every ~31.5 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count14
latest_release_tagv2.6.2
releases_from_tagsno
days_since_latest_release11
mean_days_between_releases31.5
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?

60Moderate · 17% of overall

Popularity & adoption

53Moderate
How it's scored
35.3/60Stars — 152 stars
13.4/25Forks — 42 forks
3.9/15Watchers — 6 watchers
Inputs used
forks42
stars152
watchers6
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

65Good
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (GPL-3.0)
0/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges2
has_contributingno
has_issue_templateno
has_code_of_conductyes
readme_badge_servicesgithub.com, shields.io
has_pull_request_templateno

Ecosystem adoption (downloads)

63Moderate
How it's scored
50.4/80Monthly downloads — 6,004 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packages@lichess-org/pgn-viewer
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads6,004
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?

77Good · 23% of overall

Maintainer resilience (bus factor)

38Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
5.6/22.5Commit distribution — top contributor authored 75% of commits
13.5/13.5Contributor breadth — 18 contributors
10/10OpenSSF Scorecard: Contributors — project has 7 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled18
top_contributor_share0.75

Issue & PR responsiveness

81Excellent
How it's scored
34.7/42Issue resolution — 83% of issues closed
25.5/30PR acceptance — 40/47 decided PRs merged
13/13Newcomer PR acceptance — 1/1 first-time contributors' PRs merged in 30d
7.5/15OpenSSF Scorecard: Code-Review — Found 9/18 approved changesets -- score normalized to 5
Inputs used
merged_prs40
open_issues4
closed_issues19
prs_merged_7d0
prs_decided_7d0
prs_merged_30d2
prs_decided_30d2
issue_closed_ratio0.826
closed_unmerged_prs7
first_time_authors_30d1
first_time_prs_merged_30d1
first_time_prs_decided_30d1

Ownership & stewardship

100Exceptional
How it's scored
30/30Ownership backing — organization-owned
0/20Verified domain — verified-domain status not read for this organization
25/25Owner reach — 4,248 followers of lichess-org
25/25Track record — 80 public repos, account ~10 yr old
Inputs used
followers4,248
owner_typeOrganization
is_verified—
owner_loginlichess-org
public_repos80
account_age_days3,870
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 11 days ago
20/20Version history — 14 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packages@lichess-org/pgn-viewer
ecosystemsnpm
any_deprecatedno
min_days_since_publish11

Engineering Quality

Are baseline engineering and documentation practices in place?

71Good · 19% of overall

Engineering practices

68Good
How it's scored
24/24CI workflows — 2 workflow(s)
24/24Tests present
0/16Linter config
0/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 9 out of 9 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configno
has_precommit_configno

Documentation

75Good
How it's scored
30/30README
0/25Documentation directory
15/15Documentation / homepage site — https://lichess.org
10/10Repository description
10/10Topics — 6 topics
10/10Wiki
Inputs used
topicschess, lichess, pgn, viewer, javascript, typescript
has_wikiyes
homepagehttps://lichess.org
docs_sitehttps://lichess.org
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

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

58Moderate · 16% of overall

Security posture

47Weak
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
0/7.5Branch-Protection — no data
2.5/2.5CI-Tests — 9 out of 9 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
3.8/7.5Code-Review — Found 9/18 approved changesets -- score normalized to 5
2.5/2.5Contributors — project has 7 contributing companies or organizations
10/10Dangerous-Workflow — no dangerous workflow patterns detected
0/7.5Dependency-Update-Tool — no update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
6/7.5Maintained — 10 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 8
0/5Packaging — no data
0/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5SAST — SAST tool is not run on all commits -- score normalized to 0
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities — 22 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated15
scorecard_versionv5.5.0
checks_inconclusive3
scorecard_aggregate4.7
Excluded from scoring (no data or not applicable): Branch-Protection, 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_packages4
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:@lichess-org/pgn-viewer@2.6.2 runtime dependency closure — what installing the published package pulls in — 4 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.

44Weak · 4% of overall

Agent context & guidance

16Critical
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
16/40Legible commit history — 30 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.3
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

43Weak
How it's scored
0/18One-command bootstrap
22/22Automated tests
0/11Lint / format config
11/11Static type checking — tsconfig.json
10/10Reproducible environment — lockfile
0/10Demonstrated agent practice — no agent-authored commits among the last 100
0/8Automated maintenance — no automated dependency updates observed
0/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixno
has_testsyes
lockfilespnpm-lock.yaml
has_dockerfileno
typed_languageyes
bootstrap_files—
has_devcontainerno
has_linter_configno
typecheck_configstsconfig.json
agent_commit_share0
toolchain_manifests—
dependency_bot_commit_share0

Code legibility for models

100Exceptional
How it's scored
45/45Type-checkable code — TypeScript (statically typed)
55/55Manageable file sizes — 0/22 source files over 60KB
Inputs used
primary_languageTypeScript
largest_source_bytes36,395
source_files_sampled22
oversized_source_files0

Key facts

152GitHub stars
18contributors
88commits, last 12 months
11days since last push
14releases
1bus factor
4open 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 ★ / 42 ⇿
0Stars
42Forks
14Releases

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.

010203040504222022-092024-082026-07
Major 0Minor 2Patch 12

Each point covers 4 days.

OpenSSF Scorecard 4.7 / 10
4.7aggregate

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 12:51 UTC

10Binary-Artifactsno binaries found in the repo
n/aBranch-Protectioninternal 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
10CI-Tests9 out of 9 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
5Code-ReviewFound 9/18 approved changesets -- score normalized to 5
10Contributorsproject has 7 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
8Maintained10 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 8
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
10Security-Policysecurity policy file detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0Vulnerabilities22 existing vulnerabilities detected
Direct dependencies 3
RegistryPackageVersion constraintManifest
npm@lichess-org/chessground^10.1.0package.json
npmchessops^0.15.0package.json
npmsnabbdom^3.6.4package.json
All dependencies 249

Full resolved dependency set from the GitHub dependency graph: 3 direct and 246 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npm@lichess-org/chessground10.1.0direct
npmchessops0.15.0direct
npmsnabbdom3.6.4direct
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npmrollup4.50.0indirect
npmsafe-buffer5.1.2indirect
npmsafer-buffer2.1.2indirect
npmsass1.98.0indirect
npmsecure-compare3.0.1indirect
npmside-channel1.1.0indirect
npmside-channel-list1.0.0indirect
npmside-channel-map1.0.1indirect
npmside-channel-weakmap1.0.2indirect
npmsiginfo2.0.0indirect
npmsource-map-js1.2.1indirect
npmstackback0.0.2indirect
npmstd-env3.9.0indirect
npmstrip-literal3.0.0indirect
npmsupports-color7.2.0indirect
npmtinybench2.9.0indirect
npmtinyexec0.3.2indirect
npmtinyglobby0.2.14indirect
npmtinypool1.1.1indirect
npmtinypool2.1.0indirect
npmtinyrainbow2.0.0indirect
npmtinyspy4.0.3indirect
npmto-regex-range5.0.1indirect
npmtypescript5.9.3indirect
npmundici-types7.16.0indirect
npmunion0.5.0indirect
npmurl-join4.0.1indirect
npmvite5.4.19indirect
npmvite-node3.2.4indirect
npmvitest3.2.4indirect
npmwhatwg-encoding2.0.0indirect
npmwhy-is-node-running2.3.0indirect
Dependency advisories 0

Installing npm:@lichess-org/pgn-viewer@2.6.2 pulls in 4 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.

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96playcanvas/enginePowerful web graphics runtime built on WebGL, WebGPU, WebXR and glTFExceptional100Azure/azure-sdk-for-jsThis repository is for active development of the Azure SDK for JavaScript (NodeJS & Browser). For consumers of the SDK we recommend visiting our public developer docs at https://docs.microsoft.com/javascript/azure/ or our versioned developer docs at https://azure.github.io/azure-sdk-for-js. Exceptional100supabase/supabase-jsAn isomorphic Javascript client for Supabase. Query your Supabase database, subscribe to realtime events, upload and download files, browse typescript examples, invoke postgres functions via rpc, invoke supabase edge functions, query pgvector.Exceptional100ionic-team/ionic-frameworkA powerful cross-platform UI toolkit for building native-quality iOS, Android, and Progressive Web Apps with HTML, CSS, and JavaScript.Exceptional99rolldown/rolldownFast Rust bundler for JavaScript/TypeScript with Rollup-compatible API.Exceptional99microsoft/TypeScriptTypeScript is a superset of JavaScript that compiles to clean JavaScript output.Exceptional

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 statistics — npm.