Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-08-29 15:19 UTC

jridgewell / sourcemaps

Monorepo for various sourcemap libraries

TypeScript · JavaScriptNo license detected★ 52 stars⑂ 9 forkssince Dec 2024View on GitHub ↗
KindLibraryhow this is determined

jridgewell/sourcemaps holds a health index of 53 out of 100, placing it in the Moderate band. It scores highest on Sustainability & Governance (67/100) and lowest on Vitality (35/100). It was last updated 1 day ago. A single contributor accounts for most of its recent work.

53
overall / 100
Moderate

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.

53
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 52 is calibrated to 53 on the published index scale (record calibration 2026-08-02).

Ownership

Justin RidgewellPersonal account
1,321 followers245 public repossince Aug 2009@google

This repository is owned by a personal account. A single-owner project carries more continuity risk than an organization-backed one.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npm@jridgewell/remapping2.3.5536,880,3215382 days agosourcemapremap
npm@jridgewell/source-map0.3.11265,252,69812382 days agosourcemapsourcemap
npm@jridgewell/gen-mapping0.3.13760,280,45323382 days agosourcemap
npm@jridgewell/trace-mapping0.3.31971,210,37643352 days agosourcemap
npm@jridgewell/sourcemap-codec1.6.0809,927,676161 day agosourcemapvlq

Metrics by category

Vitality

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

35Weak · 21% of overall

Development activity

57Moderate
How it's scored
36/36Push recency — last push 1 days ago
6.2/36Commit cadence — 9/52 weeks with commits
15/18Commit volume — 46 commits in the last year
0/10OpenSSF Scorecard: Maintained — 1 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
Inputs used
commits_last_year46
human_commit_share1
days_since_last_push1
active_weeks_last_year9

Release discipline

1Critical
How it's scored
0/27Ships releases — no releases published
0/36Release recency — no releases
0/27Release cadence — no releases
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count0
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?

49Weak · 17% of overall

Popularity & adoption

37Weak
How it's scored
27.7/60Stars — 52 stars
7.5/25Forks — 9 forks
1.7/15Watchers — 3 watchers
Inputs used
forks9
stars52
watchers3
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

25At Risk
How it's scored
22.5/22.5README
0/22.5License — no license file detected
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseno
readme_badges0
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_services—
has_pull_request_templateno

Ecosystem adoption (downloads)

100Exceptional
How it's scored
80/80Monthly downloads — 3,343,551,524 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packages@jridgewell/remapping, @jridgewell/source-map, @jridgewell/gen-mapping, @jridgewell/trace-mapping, @jridgewell/sourcemap-codec
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads3,343,551,524
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?

67Good · 23% of overall

Maintainer resilience (bus factor)

38Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
5.3/22.5Commit distribution — top contributor authored 77% of commits
13.5/13.5Contributor breadth — 24 contributors
10/10OpenSSF Scorecard: Contributors — project has 19 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled24
top_contributor_share0.766

Issue & PR responsiveness

71Good
How it's scored
36.5/42Issue resolution — 87% of issues closed
25.4/30PR acceptance — 11/13 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-Review — Found 1/29 approved changesets -- score normalized to 0
Inputs used
merged_prs11
open_issues5
closed_issues33
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio0.868
closed_unmerged_prs2
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

72Good
How it's scored
10/30Ownership backing — personal (user) account
0/20Verified domain — not applicable to user accounts
22.4/25Owner reach — 1,321 followers of jridgewell
25/25Track record — 245 public repos, account ~17 yr old
Inputs used
followers1,321
owner_typeUser
is_verified—
owner_loginjridgewell
public_repos245
account_age_days6,230
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 5 package(s) on npm
35/35Publish recency — latest publish 1 days ago
20/20Version history — 43 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packages@jridgewell/remapping, @jridgewell/source-map, @jridgewell/gen-mapping, @jridgewell/trace-mapping, @jridgewell/sourcemap-codec
ecosystemsnpm
any_deprecatedno
min_days_since_publish1

Engineering Quality

Are baseline engineering and documentation practices in place?

62Moderate · 19% of overall

Engineering practices

70Good
How it's scored
24/24CI workflows — 1 workflow(s)
24/24Tests present
16/16Linter config — eslint.config.mjs
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
0/20OpenSSF Scorecard: CI-Tests — 0 out of 1 merged PRs checked by a CI test -- score normalized to 0
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configyes
has_precommit_configno

Documentation

50Moderate
How it's scored
30/30README
0/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
0/10Topics
10/10Wiki
Inputs used
topics—
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?

44Weak · 16% of overall

Security posture

30At Risk
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
0/2.5CI-Tests — 0 out of 1 merged PRs checked by a CI test -- score normalized to 0
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5Code-Review — Found 1/29 approved changesets -- score normalized to 0
2.5/2.5Contributors — project has 19 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
0/2.5License — license file not detected
0/7.5Maintained — 1 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
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
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
0/7.5Vulnerabilities — 29 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate3
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_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:@jridgewell/remapping@2.3.5 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.

54Moderate · 4% of overall

Agent context & guidance

8Critical
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
8/40Legible commit history — 15 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.15
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

54Moderate
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.mjs
11/11Static type checking — packages/gen-mapping/tsconfig.json, packages/remapping/tsconfig.json, packages/source-map/tsconfig.json, packages/sourcemap-codec/tsconfig.json, packages/trace-mapping/tsconfig.json, 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
lockfilespackage-lock.json
has_dockerfileno
typed_languageyes
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configspackages/gen-mapping/tsconfig.json, packages/remapping/tsconfig.json, packages/source-map/tsconfig.json, packages/sourcemap-codec/tsconfig.json, packages/trace-mapping/tsconfig.json, tsconfig.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 — 0/89 source files over 60KB
Inputs used
primary_languageTypeScript
largest_source_bytes34,534
source_files_sampled89
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 — samples
Inputs used
example_dirssamples
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

52GitHub stars
24contributors
46commits, last 12 months
1days since last push
0releases
1bus factor
5open 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 ★ / 9 ⇿
0Stars
9Forks

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.

0246810912024-122025-102026-08

Each point covers 2 days.

OpenSSF Scorecard 3.0 / 10
3.0aggregate

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 · 2026-08-29 15:18 UTC

10Binary-Artifactsno binaries found in the repo
0Branch-Protectionbranch protection not enabled on development/release branches
0CI-Tests0 out of 1 merged PRs checked by a CI test -- score normalized to 0
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
0Code-ReviewFound 1/29 approved changesets -- score normalized to 0
10Contributorsproject has 19 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
0Licenselicense file not detected
0Maintained1 commit(s) and 0 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
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0Vulnerabilities29 existing vulnerabilities detected
Direct dependencies 8
RegistryPackageVersion constraintManifest
npm@jridgewell/sourcemap-codec^1.5.0packages/gen-mapping/package.json
npm@jridgewell/trace-mapping^0.3.24packages/gen-mapping/package.json
npm@jridgewell/gen-mapping^0.3.5packages/remapping/package.json
npm@jridgewell/trace-mapping^0.3.24packages/remapping/package.json
npm@jridgewell/gen-mapping^0.3.5packages/source-map/package.json
npm@jridgewell/trace-mapping^0.3.25packages/source-map/package.json
npm@jridgewell/resolve-uri^3.1.0packages/trace-mapping/package.json
npm@jridgewell/sourcemap-codec^1.4.14packages/trace-mapping/package.json
All dependencies 378

Full resolved dependency set from the GitHub dependency graph: 12 direct and 366 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npm@jridgewell/gen-mapping0.3.13direct
npm@jridgewell/gen-mapping^0.3.5direct
npm@jridgewell/resolve-uri3.1.2direct
npm@jridgewell/resolve-uri^3.1.0direct
npm@jridgewell/sourcemap-codec1.6.0direct
npm@jridgewell/sourcemap-codec^1.4.14direct
npm@jridgewell/sourcemap-codec^1.5.0direct
npm@jridgewell/sourcemap-codeclatestdirect
npm@jridgewell/trace-mapping0.3.31direct
npm@jridgewell/trace-mapping^0.3.24direct
npm@jridgewell/trace-mapping^0.3.25direct
npm@jridgewell/trace-mappinglatestdirect
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npm@esbuild/darwin-x640.25.5indirect
npm@esbuild/freebsd-arm640.25.5indirect
npm@esbuild/freebsd-x640.25.5indirect
npm@esbuild/linux-arm0.25.5indirect
npm@esbuild/linux-arm640.25.5indirect
npm@esbuild/linux-ia320.25.5indirect
npm@esbuild/linux-loong640.25.5indirect
npm@esbuild/linux-mips64el0.25.5indirect
npm@esbuild/linux-ppc640.25.5indirect
npm@esbuild/linux-riscv640.25.5indirect
npm@esbuild/linux-s390x0.25.5indirect
npm@esbuild/linux-x640.25.5indirect
npm@esbuild/netbsd-arm640.25.5indirect
npm@esbuild/netbsd-x640.25.5indirect
npm@esbuild/openbsd-arm640.25.5indirect
npm@esbuild/openbsd-x640.25.5indirect
npm@esbuild/sunos-x640.25.5indirect
npm@esbuild/win32-arm640.25.5indirect
npm@esbuild/win32-ia320.25.5indirect
npm@esbuild/win32-x640.25.5indirect
npm@eslint-community/eslint-utils4.7.0indirect
npm@eslint-community/regexpp4.12.1indirect
npm@eslint/config-array0.21.0indirect
npm@eslint/config-helpers0.3.0indirect
npm@eslint/core0.14.0indirect
npm@eslint/core0.15.1indirect
npm@eslint/eslintrc3.3.1indirect
npm@eslint/js9.30.0indirect
npm@eslint/object-schema2.1.6indirect
npm@eslint/plugin-kit0.3.3indirect
npm@humanfs/core0.19.1indirect
npm@humanfs/node0.16.6indirect
npm@humanwhocodes/module-importer1.0.1indirect
npm@humanwhocodes/retry0.3.1indirect
npm@humanwhocodes/retry0.4.3indirect
npm@isaacs/balanced-match4.0.1indirect
npm@isaacs/brace-expansion5.0.0indirect
npm@isaacs/cliui8.0.2indirect
npm@jridgewell/remapping2.3.5indirect
npm@jridgewell/source-map0.3.11indirect
npm@nodelib/fs.scandir2.1.5indirect
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npm@nodelib/fs.walk1.2.8indirect
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npm@types/mocha10.0.10indirect
npm@types/node24.0.7indirect
npm@types/sinon17.0.4indirect
npm@types/sinonjs__fake-timers8.1.5indirect
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npm@typescript-eslint/scope-manager8.35.0indirect
npm@typescript-eslint/tsconfig-utils8.35.0indirect
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npmchalk2.4.2indirect
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npmdebug4.4.1indirect
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npmhas-bigints1.1.0indirect
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npmhas-property-descriptors1.0.2indirect
npmhas-proto1.2.0indirect
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npmhas-tostringtag1.0.2indirect
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npmhe1.2.0indirect
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npmignore5.3.2indirect
npmignore7.0.5indirect
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npminternal-slot1.1.0indirect
npmis-array-buffer3.0.5indirect
npmis-arrayish0.2.1indirect
npmis-async-function2.1.1indirect
npmis-bigint1.1.0indirect
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npmis-callable1.2.7indirect
npmis-core-module2.16.1indirect
npmis-data-view1.0.2indirect
npmis-date-object1.1.0indirect
npmis-extglob2.1.1indirect
npmis-finalizationregistry1.1.1indirect
npmis-fullwidth-code-point3.0.0indirect
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npmis-map2.0.3indirect
npmis-negative-zero2.0.3indirect
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npmis-number-object1.1.1indirect
npmis-plain-obj2.1.0indirect
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npmis-set2.0.3indirect
npmis-shared-array-buffer1.0.4indirect
npmis-string1.1.1indirect
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npmis-typed-array1.1.15indirect
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npmis-weakmap2.0.2indirect
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npmisarray2.0.5indirect
npmisexe2.0.0indirect
npmjackspeak3.4.3indirect
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npmmath-intrinsics1.1.0indirect
npmmemorystream0.3.1indirect
npmmerge21.4.1indirect
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npmminimatch10.0.3indirect
npmminimatch3.1.2indirect
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npmminipass7.1.2indirect
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npmms2.1.3indirect
npmnatural-compare1.4.0indirect
npmnice-try1.0.5indirect
npmnormalize-package-data2.5.0indirect
npmnpm-run-all4.1.5indirect
npmobject-inspect1.13.4indirect
npmobject-keys1.1.1indirect
npmobject.assign4.1.7indirect
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npmpackage-json-from-dist1.0.1indirect
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npmparse-json4.0.0indirect
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npmplatform1.3.6indirect
npmpossible-typed-array-names1.1.0indirect
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npmqueue-microtask1.2.3indirect
npmrandombytes2.1.0indirect
npmread-pkg3.0.0indirect
npmreaddirp4.1.2indirect
npmreflect.getprototypeof1.0.10indirect
npmregexp.prototype.flags1.5.4indirect
npmrequire-directory2.1.1indirect
npmresolve1.22.10indirect
npmresolve-from4.0.0indirect
npmresolve-pkg-maps1.0.0indirect
npmreusify1.1.0indirect
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npmsupports-color5.5.0indirect
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npmturbo2.5.4indirect
npmturbo-darwin-642.5.4indirect
npmturbo-darwin-arm642.5.4indirect
npmturbo-linux-642.5.4indirect
npmturbo-linux-arm642.5.4indirect
npmturbo-windows-642.5.4indirect
npmturbo-windows-arm642.5.4indirect
npmtype-check0.4.0indirect
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npmtyped-array-buffer1.0.3indirect
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npmtypescript5.8.3indirect
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npmwhich-collection1.0.2indirect
npmwhich-typed-array1.1.19indirect
npmword-wrap1.2.5indirect
npmworkerpool9.3.3indirect
npmwrap-ansi7.0.0indirect
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npmy18n5.0.8indirect
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Dependency advisories 0

Installing npm:@jridgewell/remapping@2.3.5 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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Related records

Inspected repositories sharing catalogue tags or ecosystems with jridgewell/sourcemaps. Read them side by side →

36thlorenz/convert-source-mapConverts a source-map from/to different formats.Weak19ampproject/remappingRemap sequential sourcemaps through transformations to point at the original source codeCritical67istanbuljs/istanbuljsmonorepo containing the various nuts and bolts that facilitate istanbul.js test instrumentationGood77soenneker/soenneker.gen.adaptFrictionless object mappingGood45timothee-haudebourg/locspanCode mapping utility types and traits for Rust.Weak98electricitymaps/electricitymaps-contribThe open source repository for Electricity Maps data parsers that powers the world's most comprehensive electricity data platformExceptional

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.