Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-10 04:53 UTC

IBM / fp-go

Functional programming library for Go 1.24+, inspired by fp-ts. Uses generic type aliases for a clean, composable API. Provides Option, Either, Result, IO, IOResult, Reader, and ReaderIOResult monads, plus optics (Lens, Prism, Traversal) for immutable data manipulation. Supports Functor, Applicative, and Monad abstractions with do-notation-style

GoApache-2.0★ 2,019 stars⑂ 84 forkssince Jul 2023View on GitHub ↗

KindLibraryCommand-line toolhow this is determined

#functional-programming #go #golang #library #monad #utility

IBM/fp-go holds a health index of 89 out of 100, placing it in the Excellent band. It scores highest on Vitality (96/100) and lowest on Community & Adoption (64/100). It was last updated 1 day ago. A single contributor accounts for most of its recent work.

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.

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)

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 75 is calibrated to 89 on the published index scale (record calibration 2026-08-02).

Ownership

International Business MachinesOrganization · verified domain

8,677 followers3,945 public repossince Feb 2012

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

Package ecosystems

Registry	Package	Version	Downloads / mo	Versions	Last publish
Go	github.com/IBM/fp-go	v1.1.84	-	241	265 days ago
Go	github.com/IBM/fp-go/v2	v2.3.132	-	251	2 days ago

Metrics by category

Vitality

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

96Exceptional · 21% of overall

Development activity

94Exceptional

How it's scored

36/36	Push recency — last push 1 days ago
29.8/36	Commit cadence — 43/52 weeks with commits
18/18	Commit volume — 511 commits in the last year
10/10	OpenSSF Scorecard: Maintained — 30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10

Inputs used

commits_last_year	511
human_commit_share	0.71
days_since_last_push	1
active_weeks_last_year	43

Release discipline

100Exceptional

How it's scored

27/27	Ships releases — 100 releases published
36/36	Release recency — latest release 2 days ago
27/27	Release cadence — a release every ~0.4 days
0/10	OpenSSF Scorecard: Signed-Releases — no data

Inputs used

releases_count	100
latest_release_tag	v2.3.132
releases_from_tags	no
days_since_latest_release	2
mean_days_between_releases	0.4

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?

64Moderate · 17% of overall

Popularity & adoption

76Good

How it's scored

53.6/60	Stars — 2,019 stars
16/25	Forks — 84 forks
6.8/15	Watchers — 18 watchers

Inputs used

forks	84
stars	2,019
watchers	18
growth_state	unverified
growth_factor_pct	100
growth_unverified_reason	no_history

Community health

50Moderate

How it's scored

22.5/22.5	README
22.5/22.5	License — recognized license (Apache-2.0)
0/18	CONTRIBUTING guide
0/13.5	Code of conduct
0/7.2	Issue template
0/6.3	PR template

Inputs used

has_readme	yes
has_license	yes
readme_badges	2
has_contributing	no
has_issue_template	no
has_code_of_conduct	no
readme_badge_services	coveralls.io, pkg.go.dev
has_pull_request_template	no

Sustainability & Governance

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

72Good · 23% of overall

Maintainer resilience (bus factor)

26At Risk

How it's scored

9/54	Bus factor — 1 contributor(s) cover half of all commits
0.7/22.5	Commit distribution — top contributor authored 97% of commits
13.5/13.5	Contributor breadth — 16 contributors
3/10	OpenSSF Scorecard: Contributors — project has 1 contributing companies or organizations -- score normalized to 3

Inputs used

bus_factor	1
contributors_sampled	16
top_contributor_share	0.971

Issue & PR responsiveness

76Good

How it's scored

36.4/42	Issue resolution — 87% of issues closed
29.4/30	PR acceptance — 210/214 decided PRs merged
0/13	Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15	OpenSSF Scorecard: Code-Review — Found 0/30 approved changesets -- score normalized to 0

Inputs used

merged_prs	210
open_issues	2
closed_issues	13
prs_merged_7d	0
prs_decided_7d	0
prs_merged_30d	0
prs_decided_30d	0
issue_closed_ratio	0.867
closed_unmerged_prs	4
first_time_authors_30d	0
first_time_prs_merged_30d	0
first_time_prs_decided_30d	0

Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.

Ownership & stewardship

100Exceptional

How it's scored

30/30	Ownership backing — organization-owned
20/20	Verified domain
25/25	Owner reach — 8,677 followers of IBM
25/25	Track record — 3,945 public repos, account ~14 yr old

Inputs used

followers	8,677
owner_type	Organization
is_verified	yes
owner_login	IBM
public_repos	3,945
account_age_days	5,314

Package maintenance

100Exceptional

How it's scored

25/25	Published & resolvable — 2 package(s) on go
35/35	Publish recency — latest publish 2 days ago
20/20	Version history — 251 published versions
20/20	Not deprecated — active, not deprecated or yanked

Inputs used

packages	github.com/IBM/fp-go, github.com/IBM/fp-go/v2
ecosystems	go
any_deprecated	no
min_days_since_publish	2

Engineering Quality

Are baseline engineering and documentation practices in place?

71Good · 19% of overall

Engineering practices

68Good

How it's scored

24/24	CI workflows — 1 workflow(s)
24/24	Tests present
0/16	Linter config
0/9.6	Pre-commit hooks
0/6.4	.editorconfig
20/20	OpenSSF Scorecard: CI-Tests — 6 out of 6 merged PRs checked by a CI test -- score normalized to 10

Inputs used

has_ci	yes
has_tests	yes
has_editorconfig	no
has_linter_config	no
has_precommit_config	no

Documentation

75Good

How it's scored

30/30	README
0/25	Documentation directory
15/15	Documentation / homepage site — https://github.com/IBM/fp-go/tree/main/v2
10/10	Repository description
10/10	Topics — 6 topics
10/10	Wiki

Inputs used

topics	functional-programming, go, golang, library, monad, utility
has_wiki	yes
homepage	https://github.com/IBM/fp-go/tree/main/v2
docs_site	https://github.com/IBM/fp-go/tree/main/v2
has_readme	yes
has_docs_dir	no
has_description	yes

Security

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

66Good · 16% of overall

Security posture

57Moderate

How it's scored

7.5/7.5	Binary-Artifacts — no binaries found in the repo
0/7.5	Branch-Protection — branch protection not enabled on development/release branches
2.5/2.5	CI-Tests — 6 out of 6 merged PRs checked by a CI test -- score normalized to 10
0/2.5	CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5	Code-Review — Found 0/30 approved changesets -- score normalized to 0
0.8/2.5	Contributors — project has 1 contributing companies or organizations -- score normalized to 3
10/10	Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5	Dependency-Update-Tool — update tool detected
0/5	Fuzzing — project is not fuzzed
2.5/2.5	License — license file detected
7.5/7.5	Maintained — 30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
5/5	Packaging — packaging workflow detected
1/5	Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 2
0/5	SAST — SAST tool is not run on all commits -- score normalized to 0
5/5	Security-Policy — security policy file detected
0/7.5	Signed-Releases — no data
0/7.5	Token-Permissions — detected GitHub workflow tokens with excessive permissions
6/7.5	Vulnerabilities — 2 existing vulnerabilities detected

Inputs used

source	openssf_scorecard
checks_evaluated	17
scorecard_version	v5.5.0
checks_inconclusive	1
scorecard_aggregate	5.7

Excluded from scoring (no data or not applicable): Signed-Releases. Remaining weights renormalized.

Dependency advisories

100Exceptional

How it's scored

35/35	Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25	Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40	No advisories left outstanding — no advisory carries a publication date

Inputs used

source	osv
advisories	2
affected_packages	1
assessed_packages	34
unassessed_packages	0
affected_by_severity	unknown 1
direct_affected_packages	0

Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 34 resolved dependencies against OSV. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. 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.

86Excellent · 4% of overall

Agent context & guidance

100Exceptional

How it's scored

45/45	Agent instructions — v2/AGENTS.md
15/15	Machine-readable docs (llms.txt) — llms.txt present
40/40	Legible commit history — 62 of 71 human commits state their intent (structured subject or explanatory body)

Inputs used

has_llms_txt	yes
llms_txt_url	—
legible_history_share	0.873
agent_instruction_files	v2/AGENTS.md
agent_instruction_max_bytes	11,626

Verify loop (build / test / typecheck)

66Good

How it's scored

12.6/18	One-command bootstrap — gen/v2/go.mod, go.mod, v2/go.mod (toolchain convention, no task runner)
22/22	Automated tests
0/11	Lint / format config
11/11	Static type checking — Go (statically typed)
10/10	Reproducible environment — lockfile
0/10	Demonstrated agent practice — no agent-authored commits among the last 100
8/8	Automated maintenance — 29 of the last 100 commits are automated dependency updates
2/10	OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 2

Inputs used

has_nix	no
has_tests	yes
lockfiles	go.sum
has_dockerfile	no
typed_language	yes
bootstrap_files	—
has_devcontainer	no
has_linter_config	no
typecheck_configs	—
agent_commit_share	0
toolchain_manifests	gen/v2/go.mod, go.mod, v2/go.mod
dependency_bot_commit_share	0.29

Code legibility for models

100Exceptional

How it's scored

45/45	Type-checkable code — Go (statically typed)
54.6/55	Manageable file sizes — 19/2,599 source files over 60KB

Inputs used

primary_language	Go
largest_source_bytes	193,847
source_files_sampled	2,599
oversized_source_files	19

Machine-readable interfaces

100Exceptional

How it's scored

0/40	API schema (OpenAPI/GraphQL/proto) — not applicable to this kind of software
0/20	MCP server — not applicable to this kind of software
40/40	Runnable examples — examples, samples

Inputs used

example_dirs	examples, samples
has_mcp_signal	no
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

2,019GitHub stars

16contributors

511commits, last 12 months

1days since last push

100releases

1bus factor

2open issues

Gopackage ecosystems

Data collection warnings

Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

More detail

Star and fork history 0 ★ / 84 ⇿

0Stars

84Forks

94Releases

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.

Major 0Minor 0Patch 94

Each point covers 3 days.

OpenSSF Scorecard 5.7 / 10

5.7aggregate

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 · 2026-09-10 04:53 UTC

10	Binary-Artifacts	no binaries found in the repo
0	Branch-Protection	branch protection not enabled on development/release branches
10	CI-Tests	6 out of 6 merged PRs checked by a CI test -- score normalized to 10
0	CII-Best-Practices	no effort to earn an OpenSSF best practices badge detected
0	Code-Review	Found 0/30 approved changesets -- score normalized to 0
3	Contributors	project has 1 contributing companies or organizations -- score normalized to 3
10	Dangerous-Workflow	no dangerous workflow patterns detected
10	Dependency-Update-Tool	update tool detected
0	Fuzzing	project is not fuzzed
10	License	license file detected
10	Maintained	30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
10	Packaging	packaging workflow detected
2	Pinned-Dependencies	dependency not pinned by hash detected -- score normalized to 2
0	SAST	SAST tool is not run on all commits -- score normalized to 0
10	Security-Policy	security policy file detected
n/a	Signed-Releases	no releases found
0	Token-Permissions	detected GitHub workflow tokens with excessive permissions
8	Vulnerabilities	2 existing vulnerabilities detected

Direct dependencies 4

Registry	Package	Version constraint	Manifest
Go	github.com/stretchr/testify	`v1.12.1`	go.mod
Go	github.com/urfave/cli/v2	`v2.27.7`	go.mod
Go	github.com/stretchr/testify	`v1.12.1`	v2/go.mod
Go	github.com/urfave/cli/v3	`v3.11.0`	v2/go.mod

All dependencies 34

Full resolved dependency set from the GitHub dependency graph: 3 direct and 31 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

Registry	Package	Version	Relation
Go	github.com/stretchr/testify	`v1.12.1`	direct
Go	github.com/urfave/cli/v2	`v2.27.7`	direct
Go	github.com/urfave/cli/v3	`v3.11.0`	direct
Go	github.com/cpuguy83/go-md2man/v2	`v2.0.7`	indirect
Go	github.com/davecgh/go-spew	`v1.1.1`	indirect
Go	github.com/dustin/go-humanize	`v1.0.1`	indirect
Go	github.com/google/jsonschema-go	`v0.4.3`	indirect
Go	github.com/google/uuid	`v1.6.0`	indirect
Go	github.com/iancoleman/strcase	`v0.3.0`	indirect
Go	github.com/ibm/fp-go/v2	`v2.3.132`	indirect
Go	github.com/mattn/go-isatty	`v0.0.24`	indirect
Go	github.com/modelcontextprotocol/go-sdk	`v1.7.0`	indirect
Go	github.com/ncruces/go-strftime	`v1.0.0`	indirect
Go	github.com/otiai10/copy	`v1.14.1`	indirect
Go	github.com/otiai10/mint	`v1.6.3`	indirect
Go	github.com/pmezard/go-difflib	`v1.0.0`	indirect
Go	github.com/remyoudompheng/bigfft	`v0.0.0-20230129092748-24d4a6f8daec`	indirect
Go	github.com/russross/blackfriday/v2	`v2.1.0`	indirect
Go	github.com/segmentio/asm	`v1.2.1`	indirect
Go	github.com/segmentio/encoding	`v0.5.4`	indirect
Go	github.com/xrash/smetrics	`v0.0.0-20240521201337-686a1a2994c1`	indirect
Go	github.com/yosida95/uritemplate/v3	`v3.0.2`	indirect
Go	go.yaml.in/yaml/v3	`v3.0.5`	indirect
Go	golang.org/x/mod	`v0.39.0`	indirect
Go	golang.org/x/oauth2	`v0.36.0`	indirect
Go	golang.org/x/sync	`v0.22.0`	indirect
Go	golang.org/x/sys	`v0.47.0`	indirect
Go	golang.org/x/time	`v0.15.0`	indirect
Go	golang.org/x/tools	`v0.49.0`	indirect
Go	gopkg.in/yaml.v3	`v3.0.1`	indirect
Go	modernc.org/libc	`v1.75.6`	indirect
Go	modernc.org/mathutil	`v1.7.1`	indirect
Go	modernc.org/memory	`v1.12.1`	indirect
Go	modernc.org/sqlite	`v1.58.0`	indirect

Dependency advisories 1

This repository publishes no package the index resolves, so its own dependency graph was assessed — 34 packages, which also include development and test pins that never ship: 1 carry known advisories, of which 0 are direct.

Package	Version	Relation	Severity	Advisories	Fixed in
golang.org/x/mod	`v0.39.0`	indirect	unknown	2	`1.27.0-rc.3`

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.

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 — Go.

Software health index

Score profile

Ownership

Package ecosystems

Metrics by category

Key facts

Data collection warnings

More detail

Feedback

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