Public record
Software health reportschema 0.12.0 · metrics 2.10.0 · 2026-07-18 12:04 UTC

jfcherng / php-sequence-matcher

A longest sequence matcher. The logic is primarily based on the Python difflib package.

PHPBSD-3-Clause★ 9 stars⑂ 4 forkssince Feb 2019View on GitHub ↗
KindLibraryhow this is determined
#diff#sequence-matcher#php71#psr-1#psr-4#psr-12

jfcherng/php-sequence-matcher holds a health index of 53 out of 100, placing it in the Moderate band. It scores highest on Engineering Quality (83/100) and lowest on Security (30/100). It was last updated 91 days 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

Jack CherngPersonal account
166 followers62 public repossince Feb 2014Realtek Semiconductor Corp.

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 publish
Packagistjfcherng/php-sequence-matcher5.0.0225,70622102 days ago

Metrics by category

Vitality

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

37Weak · 21% of overall

Development activity

18Critical
How it's scored
9.9/36Push recency — last push 91 days ago
0.7/36Commit cadence — 1/52 weeks with commits
7.6/18Commit volume — 6 commits in the last year
0/10OpenSSF Scorecard: Maintained — 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
Inputs used
commits_last_year6
human_commit_share—
days_since_last_push91
active_weeks_last_year1

Release discipline

66Good
How it's scored
27/27Ships releases — 7 releases published
27/36Release recency — latest release 102 days ago
5.4/27Release cadence — a release every ~433.7 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count7
latest_release_tag5.0.0
releases_from_tagsno
days_since_latest_release102
mean_days_between_releases433.7
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?

44Weak · 17% of overall

Popularity & adoption

19Critical
How it's scored
14.6/60Stars — 9 stars
4/25Forks — 4 forks
0/15Watchers — 1 watchers
Inputs used
forks4
stars9
watchers1
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 (BSD-3-Clause)
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges—
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_services—
has_pull_request_templateno

Ecosystem adoption (downloads)

75Good
How it's scored
71.4/80Monthly downloads — 225,706 downloads/month across packagist
3.2/20Registry dependents — 2 packages depend on it
Inputs used
packagesjfcherng/php-sequence-matcher
dependents2
ecosystemspackagist
total_downloads5,940,085
monthly_downloads225,706
unverified_packages_excluded—

Sustainability & Governance

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

59Moderate · 23% of overall

Maintainer resilience (bus factor)

22At Risk
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
0.2/22.5Commit distribution — top contributor authored 99% of commits
2.7/13.5Contributor breadth — 2 contributors
10/10OpenSSF Scorecard: Contributors — project has 6 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled2
top_contributor_share0.99

Issue & PR responsiveness

66Good
How it's scored
42/42Issue resolution — 100% of issues closed
15/30PR acceptance — 1/2 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-Review — Found 0/30 approved changesets -- score normalized to 0
Inputs used
merged_prs1
open_issues0
closed_issues1
prs_merged_7d—
prs_decided_7d—
prs_merged_30d—
prs_decided_30d—
issue_closed_ratio1
closed_unmerged_prs1
first_time_authors_30d—
first_time_prs_merged_30d—
first_time_prs_decided_30d—
Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.

Ownership & stewardship

64Moderate
How it's scored
10/30Ownership backing — personal (user) account
0/20Verified domain — not applicable to user accounts
16/25Owner reach — 166 followers of jfcherng
25/25Track record — 62 public repos, account ~12 yr old
Inputs used
followers166
owner_typeUser
is_verified—
owner_loginjfcherng
public_repos62
account_age_days4,545
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 packagist
35/35Publish recency — latest publish 102 days ago
20/20Version history — 22 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesjfcherng/php-sequence-matcher
ecosystemspackagist
any_deprecatedno
min_days_since_publish102

Engineering Quality

Are baseline engineering and documentation practices in place?

83Excellent · 19% of overall

Engineering practices

88Excellent
How it's scored
24/24CI workflows — 1 workflow(s)
24/24Tests present
16/16Linter config — .php-cs-fixer.dist.php, phpcs.xml
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
0/20OpenSSF Scorecard: CI-Tests — no data
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configyes
has_precommit_configno
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: CI-Tests. Remaining weights renormalized.

Documentation

75Good
How it's scored
30/30README
0/25Documentation directory
15/15Documentation / homepage site — https://packagist.org/packages/jfcherng/php-sequence-matcher
10/10Repository description
10/10Topics — 6 topics
10/10Wiki
Inputs used
topicsdiff, sequence-matcher, php71, psr-1, psr-4, psr-12
has_wikiyes
homepagehttps://packagist.org/packages/jfcherng/php-sequence-matcher
docs_sitehttps://packagist.org/packages/jfcherng/php-sequence-matcher
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

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

30At Risk · 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 — no data
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5Code-Review — Found 0/30 approved changesets -- score normalized to 0
2.5/2.5Contributors — project has 6 contributing companies or organizations
0/10Dangerous-Workflow — no data
0/7.5Dependency-Update-Tool — no update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
0/7.5Maintained — 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
0/5Packaging — no data
0/5Pinned-Dependencies — no data
0/5SAST — no SAST tool detected
0/5Security-Policy — security policy file not detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — no data
7.5/7.5Vulnerabilities — 0 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated12
scorecard_versionv5.5.0
checks_inconclusive6
scorecard_aggregate3
Excluded from scoring (no data or not applicable): CI-Tests, Dangerous-Workflow, Packaging, Pinned-Dependencies, Signed-Releases, Token-Permissions. Remaining weights renormalized.

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.

64Moderate · 4% of overall

Agent context & guidance

75Good
How it's scored
45/45Agent instructions — CLAUDE.md
0/15Machine-readable docs (llms.txt)
0/40Legible commit history — no data
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share—
agent_instruction_filesCLAUDE.md
agent_instruction_max_bytes1,435
Excluded from scoring (no data or not applicable): Legible commit history. Remaining weights renormalized.

Verify loop (build / test / typecheck)

60Moderate
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — .php-cs-fixer.dist.php, phpcs.xml
0/11Static type checking
10/10Reproducible environment — lockfile
0/10Demonstrated agent practice — no data
0/8Automated maintenance — no data
0/10OpenSSF Scorecard: Pinned-Dependencies — no data
Inputs used
has_nixno
has_testsyes
lockfilescomposer.lock
has_dockerfileno
typed_languageno
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configs—
agent_commit_share—
toolchain_manifests—
dependency_bot_commit_share—
Excluded from scoring (no data or not applicable): Demonstrated agent practice, Automated maintenance, OpenSSF Scorecard: Pinned-Dependencies. Remaining weights renormalized.

Code legibility for models

55Moderate
How it's scored
0/45Type-checkable code — PHP without a type-check config
55/55Manageable file sizes — 0/9 source files over 60KB
Inputs used
primary_languagePHP
largest_source_bytes20,100
source_files_sampled9
oversized_source_files0

Key facts

9GitHub stars
2contributors
6commits, last 12 months
91days since last push
7releases
1bus factor
0open issues
Packagistpackage ecosystems

More detail

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 · 2026-07-18 12:04 UTC

10Binary-Artifactsno binaries found in the repo
0Branch-Protectionbranch protection not enabled on development/release branches
n/aCI-Testsno pull request found
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
0Code-ReviewFound 0/30 approved changesets -- score normalized to 0
10Contributorsproject has 6 contributing companies or organizations
n/aDangerous-Workflowno workflows found
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
0Maintained0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
n/aPackagingpackaging workflow not detected
n/aPinned-Dependenciesno dependencies found
0SASTno SAST tool detected
0Security-Policysecurity policy file not detected
n/aSigned-Releasesno releases found
n/aToken-PermissionsNo tokens found
10Vulnerabilities0 existing vulnerabilities detected
All dependencies 73

Full resolved dependency set from the GitHub dependency graph: 0 direct and 73 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
Packagistclue/ndjson-react1.3.0indirect
Packagistcomposer/pcre3.3.2indirect
Packagistcomposer/semver3.4.4indirect
Packagistcomposer/xdebug-handler3.0.5indirect
Packagistdanog/advanced-json-rpc3.2.3indirect
Packagistdoctrine/deprecations1.1.6indirect
Packagistevenement/evenement3.0.2indirect
Packagistfidry/cpu-core-counter1.3.0indirect
Packagistfriendsofphp/php-cs-fixer3.94.2indirect
Packagistmyclabs/deep-copy1.13.4indirect
Packagistnetresearch/jsonmapper5.0.1indirect
Packagistnikic/php-parser5.7.0indirect
Packagistphan/phan6.0.5indirect
Packagistphan/tolerant-php-parser0.2.0indirect
Packagistphan/var_representation_polyfill0.1.4indirect
Packagistphar-io/manifest2.0.4indirect
Packagistphar-io/version3.2.1indirect
Packagistphpdocumentor/reflection-common2.2.0indirect
Packagistphpdocumentor/reflection-docblock6.0.3indirect
Packagistphpdocumentor/type-resolver2.0.0indirect
Packagistphpstan/phpdoc-parser2.3.2indirect
Packagistphpunit/php-code-coverage12.5.3indirect
Packagistphpunit/php-file-iterator6.0.1indirect
Packagistphpunit/php-invoker6.0.0indirect
Packagistphpunit/php-text-template5.0.0indirect
Packagistphpunit/php-timer8.0.0indirect
Packagistphpunit/phpunit12.5.16indirect
Packagistpsr/container2.0.2indirect
Packagistpsr/event-dispatcher1.0.0indirect
Packagistpsr/log3.0.2indirect
Packagistreact/cache1.2.0indirect
Packagistreact/child-process0.6.7indirect
Packagistreact/dns1.14.0indirect
Packagistreact/event-loop1.6.0indirect
Packagistreact/promise3.3.0indirect
Packagistreact/socket1.17.0indirect
Packagistreact/stream1.4.0indirect
Packagistsabre/event6.0.1indirect
Packagistsebastian/cli-parser4.2.0indirect
Packagistsebastian/comparator7.1.4indirect
Packagistsebastian/complexity5.0.0indirect
Packagistsebastian/diff7.0.0indirect
Packagistsebastian/environment8.0.4indirect
Packagistsebastian/exporter7.0.2indirect
Packagistsebastian/global-state8.0.2indirect
Packagistsebastian/lines-of-code4.0.0indirect
Packagistsebastian/object-enumerator7.0.0indirect
Packagistsebastian/object-reflector5.0.0indirect
Packagistsebastian/recursion-context7.0.1indirect
Packagistsebastian/type6.0.3indirect
Packagistsebastian/version6.0.0indirect
Packagistsquizlabs/php_codesniffer4.0.1indirect
Packagiststaabm/side-effects-detector1.0.5indirect
Packagistsymfony/console7.4.8indirect
Packagistsymfony/deprecation-contracts3.6.0indirect
Packagistsymfony/event-dispatcher7.4.8indirect
Packagistsymfony/event-dispatcher-contracts3.6.0indirect
Packagistsymfony/filesystem7.4.8indirect
Packagistsymfony/finder7.4.8indirect
Packagistsymfony/options-resolver7.4.8indirect
Packagistsymfony/polyfill-ctype1.33.0indirect
Packagistsymfony/polyfill-intl-grapheme1.33.0indirect
Packagistsymfony/polyfill-intl-normalizer1.33.0indirect
Packagistsymfony/polyfill-mbstring1.33.0indirect
Packagistsymfony/polyfill-php801.33.0indirect
Packagistsymfony/polyfill-php811.33.0indirect
Packagistsymfony/polyfill-php841.33.0indirect
Packagistsymfony/process7.4.8indirect
Packagistsymfony/service-contracts3.6.1indirect
Packagistsymfony/stopwatch7.4.8indirect
Packagistsymfony/string7.4.8indirect
Packagisttheseer/tokenizer2.0.1indirect
Packagistwebmozart/assert2.1.6indirect
Raw JSON report machine-readable

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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 v0.12.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics — Packagist.