Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-18 01:34 UTC

checkpoint-restore / criu

Checkpoint/Restore tool

C · PythonCustom license★ 3,957 stars⑂ 766 forkssince Jan 2014View on GitHub ↗
KindCommand-line toolhow this is determined

checkpoint-restore/criu holds a health index of 92 out of 100, placing it in the Excellent band. It scores highest on Community & Adoption (86/100) and lowest on Security (62/100). It was last updated 3 days ago. 2 contributors account for most of its recent work.

92
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.

92
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 78 is calibrated to 92 on the published index scale (record calibration 2026-08-02).

Ownership

checkpoint-restoreOrganization
181 followers9 public repossince Sep 2017

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
PyPIcritpoints to another repo — not scored0.110722777 days agoansiblealternativeinfrastructureasactualcodedeploymentinstallingsetup

Metrics by category

Vitality

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

84Excellent · 21% of overall
How it's scored
36/36Push recencylast push 3 days ago
33.9/36Commit cadence49/52 weeks with commits
18/18Commit volume474 commits in the last year
10/10OpenSSF Scorecard: Maintained30 commit(s) and 4 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year474
human_commit_share1
days_since_last_push3
active_weeks_last_year49
How it's scored
16.2/27Ships releases14 version tags (no GitHub releases)
36/36Release recencylatest release 28 days ago
5.4/27Release cadencea release every ~435.9 days
0/10OpenSSF Scorecard: Signed-Releasesno data
Inputs used
releases_count14
latest_release_tagv4.2.1
releases_from_tagsyes
days_since_latest_release28
mean_days_between_releases435.9
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?

86Excellent · 17% of overall
How it's scored
58.4/60Stars3,957 stars
24/25Forks766 forks
10.2/15Watchers70 watchers
Inputs used
forks766
stars3,957
watchers70
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history
How it's scored
22.5/22.5README
16.9/22.5Licenselicense file present, not a recognized license
18/18CONTRIBUTING guide
0/13.5Code of conduct
7.2/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges2
has_contributingyes
has_issue_templateyes
has_code_of_conductno
readme_badge_servicescircleci.com, github.com
has_pull_request_templateyes

Sustainability & Governance

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

70Good · 23% of overall
How it's scored
25.2/54Bus factor2 contributor(s) cover half of all commits
16.1/22.5Commit distributiontop contributor authored 28% of commits
13.5/13.5Contributor breadth100 contributors
10/10OpenSSF Scorecard: Contributorsproject has 35 contributing companies or organizations
Inputs used
bus_factor2
contributors_sampled100
top_contributor_share0.283
How it's scored
37.3/42Issue resolution89% of issues closed
22.4/30PR acceptance1,072/1,437 decided PRs merged
2.6/13Newcomer PR acceptance1/5 first-time contributors' PRs merged in 30d
3/15OpenSSF Scorecard: Code-ReviewFound 5/24 approved changesets -- score normalized to 2
Inputs used
merged_prs1,072
open_issues179
closed_issues1,402
prs_merged_7d2
prs_decided_7d2
prs_merged_30d10
prs_decided_30d17
issue_closed_ratio0.887
closed_unmerged_prs365
first_time_authors_30d4
first_time_prs_merged_30d1
first_time_prs_decided_30d5
How it's scored
30/30Ownership backingorganization-owned
0/20Verified domainverified-domain status not read for this organization
16.2/25Owner reach181 followers of checkpoint-restore
19.3/25Track record9 public repos, account ~8 yr old
Inputs used
followers181
owner_typeOrganization
is_verified
owner_logincheckpoint-restore
public_repos9
account_age_days3,245
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Engineering Quality

Are baseline engineering and documentation practices in place?

86Excellent · 19% of overall
How it's scored
24/24CI workflows8 workflow(s)
24/24Tests present
16/16Linter configruff.toml
0/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests7 out of 7 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configno

Documentation

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage sitecriu.org
10/10Repository description
10/10Topics17 topics
0/10Wiki
Inputs used
topicscheckpoint, restore, linux, migration, containers, criu, blcr, dmtcp, container, post-copy, userfaultfd, snapshot, parasite, suspend, zero-downtime, highly-available, memory-tracking
has_wikino
homepagecriu.org
docs_sitecriu.org
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

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

62Moderate · 16% of overall
How it's scored
7.5/7.5Binary-Artifactsno binaries found in the repo
2.2/7.5Branch-Protectionbranch protection is not maximal on development and all release branches
2.5/2.5CI-Tests7 out of 7 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
1.5/7.5Code-ReviewFound 5/24 approved changesets -- score normalized to 2
2.5/2.5Contributorsproject has 35 contributing companies or organizations
10/10Dangerous-Workflowno dangerous workflow patterns detected
0/7.5Dependency-Update-Toolno update tool detected
0/5Fuzzingproject is not fuzzed
2.2/2.5Licenselicense file detected
7.5/7.5Maintained30 commit(s) and 4 issue activity found in the last 90 days -- score normalized to 10
0/5Packagingno data
1/5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 2
5/5SASTSAST tool is run on all commits
0/5Security-Policysecurity policy file not detected
0/7.5Signed-Releasesno data
0/7.5Token-Permissionsdetected GitHub workflow tokens with excessive permissions
7.5/7.5Vulnerabilities0 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate5.4
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 advisoriesno direct dependency carries a known advisory
0/25Indirect dependencies free of known advisoriestransitive set not separable from development and test dependencies in this scope
0/40No advisories left outstandingno advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages2
unassessed_packages1
affected_by_severitynone
direct_affected_packages0
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 2 resolved dependencies against OSV. 1 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list. 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.

78Good · 4% of overall
How it's scored
45/45Agent instructions.github/copilot-instructions.md, CLAUDE.md, GEMINI.md
0/15Machine-readable docs (llms.txt)
40/40Legible commit history100 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url
legible_history_share1
agent_instruction_files.github/copilot-instructions.md, CLAUDE.md, GEMINI.md
agent_instruction_max_bytes5,547
How it's scored
18/18One-command bootstrapDocumentation/Makefile, Makefile, compel/Makefile, compel/plugins/Makefile, compel/test/Makefile, compel/test/fdspy/Makefile, compel/test/infect/Makefile, compel/test/rsys/Makefile, compel/test/stack/Makefile, contrib/criu-service-client/Makefile, contrib/criu-service-client/test/Makefile, crit/Makefile, criu/Makefile, criu/arch/aarch64/Makefile, criu/arch/arm/Makefile, criu/arch/loongarch64/Makefile, criu/arch/mips/Makefile, criu/arch/ppc64/Makefile, criu/arch/riscv64/Makefile, criu/arch/s390/Makefile, criu/arch/x86/Makefile, criu/pie/Makefile, criu/unittest/Makefile, images/Makefile, lib/Makefile, lib/c/Makefile, lib/pycriu/Makefile, lib/pycriu/images/Makefile, plugins/amdgpu/Makefile, plugins/cuda/Makefile, scripts/build/Makefile, scripts/ci/Makefile, scripts/nmk/Documentation/Makefile, scripts/nmk/Makefile, soccr/Makefile, soccr/test/Makefile, test/Makefile, test/compel/Makefile, test/cuda-checkpoint/Makefile, test/libfault/Makefile, test/others/Makefile, test/others/action-script/Makefile, test/others/app-emu/job/Makefile, test/others/app-emu/make/Makefile, test/others/bers/Makefile, test/others/compression/benchmark/Makefile, test/others/compression/incremental/Makefile, test/others/compression/page-server/Makefile, test/others/compression/raw/Makefile, test/others/compression/sglang/Makefile, test/others/compression/vllm/Makefile, test/others/compression/vma-boundary/Makefile, test/others/config-file/Makefile, test/others/crit/Makefile, test/others/criu-coredump/Makefile, test/others/criu-ns/Makefile, test/others/ext-links/Makefile, test/others/libcriu/Makefile, test/others/make/Makefile, test/others/mem-snap/Makefile, test/others/mnt-ext-dev/Makefile, test/others/mounts/ext/Makefile, test/others/ns_ext/Makefile, test/others/overlayfs/Makefile, test/others/pipes/Makefile, test/others/pycriu/Makefile, test/others/rpc/Makefile, test/others/security/Makefile, test/others/shell-job/Makefile, test/others/skip-file-rwx-check/Makefile, test/others/socketpairs/Makefile, test/others/tcp/Makefile, test/others/unix-callback/Makefile, test/plugins/Makefile, test/zdtm/Makefile, test/zdtm/lib/Makefile, test/zdtm/static/Makefile, test/zdtm/transition/Makefile
22/22Automated tests
11/11Lint / format configruff.toml
11/11Static type checkingC (statically typed)
10/10Reproducible environmentDockerfile, Nix
0/10Demonstrated agent practiceno agent-authored commits among the last 100
0/8Automated maintenanceno automated dependency updates observed
2/10OpenSSF Scorecard: Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 2
Inputs used
has_nixyes
has_testsyes
lockfiles
has_dockerfileyes
typed_languageyes
bootstrap_filesDocumentation/Makefile, Makefile, compel/Makefile, compel/plugins/Makefile, compel/test/Makefile, compel/test/fdspy/Makefile, compel/test/infect/Makefile, compel/test/rsys/Makefile, compel/test/stack/Makefile, contrib/criu-service-client/Makefile, contrib/criu-service-client/test/Makefile, crit/Makefile, criu/Makefile, criu/arch/aarch64/Makefile, criu/arch/arm/Makefile, criu/arch/loongarch64/Makefile, criu/arch/mips/Makefile, criu/arch/ppc64/Makefile, criu/arch/riscv64/Makefile, criu/arch/s390/Makefile, criu/arch/x86/Makefile, criu/pie/Makefile, criu/unittest/Makefile, images/Makefile, lib/Makefile, lib/c/Makefile, lib/pycriu/Makefile, lib/pycriu/images/Makefile, plugins/amdgpu/Makefile, plugins/cuda/Makefile, scripts/build/Makefile, scripts/ci/Makefile, scripts/nmk/Documentation/Makefile, scripts/nmk/Makefile, soccr/Makefile, soccr/test/Makefile, test/Makefile, test/compel/Makefile, test/cuda-checkpoint/Makefile, test/libfault/Makefile, test/others/Makefile, test/others/action-script/Makefile, test/others/app-emu/job/Makefile, test/others/app-emu/make/Makefile, test/others/bers/Makefile, test/others/compression/benchmark/Makefile, test/others/compression/incremental/Makefile, test/others/compression/page-server/Makefile, test/others/compression/raw/Makefile, test/others/compression/sglang/Makefile, test/others/compression/vllm/Makefile, test/others/compression/vma-boundary/Makefile, test/others/config-file/Makefile, test/others/crit/Makefile, test/others/criu-coredump/Makefile, test/others/criu-ns/Makefile, test/others/ext-links/Makefile, test/others/libcriu/Makefile, test/others/make/Makefile, test/others/mem-snap/Makefile, test/others/mnt-ext-dev/Makefile, test/others/mounts/ext/Makefile, test/others/ns_ext/Makefile, test/others/overlayfs/Makefile, test/others/pipes/Makefile, test/others/pycriu/Makefile, test/others/rpc/Makefile, test/others/security/Makefile, test/others/shell-job/Makefile, test/others/skip-file-rwx-check/Makefile, test/others/socketpairs/Makefile, test/others/tcp/Makefile, test/others/unix-callback/Makefile, test/plugins/Makefile, test/zdtm/Makefile, test/zdtm/lib/Makefile, test/zdtm/static/Makefile, test/zdtm/transition/Makefile
has_devcontainerno
has_linter_configyes
typecheck_configs
agent_commit_share0
toolchain_manifeststest/javaTests/pom.xml
dependency_bot_commit_share0
How it's scored
45/45Type-checkable codeC (statically typed)
54.6/55Manageable file sizes10/1,327 source files over 60KB
Inputs used
primary_languageC
largest_source_bytes110,256
source_files_sampled1,327
oversized_source_files10
How it's scored
40/40API schema (OpenAPI/GraphQL/proto)images/apparmor.proto, images/autofs.proto, images/binfmt-misc.proto, images/bpfmap-data.proto, images/bpfmap-file.proto, images/cgroup.proto, images/core-aarch64.proto, images/core-arm.proto, images/core-loongarch64.proto, images/core-mips.proto, images/core-ppc64.proto, images/core-riscv64.proto, images/core-s390.proto, images/core-x86.proto, images/core.proto, images/cpuinfo.proto, images/creds.proto, images/eventfd.proto, images/eventpoll.proto, images/ext-file.proto, images/fdinfo.proto, images/fh.proto, images/fifo.proto, images/file-lock.proto, images/fown.proto, images/fs.proto, images/fsnotify.proto, images/ghost-file.proto, images/img-streamer.proto, images/inventory.proto, images/ipc-desc.proto, images/ipc-msg.proto, images/ipc-sem.proto, images/ipc-shm.proto, images/ipc-var.proto, images/macvlan.proto, images/memfd.proto, images/mm.proto, images/mnt.proto, images/netdev.proto, images/ns.proto, images/opts.proto, images/packet-sock.proto, images/pagemap.proto, images/pidfd.proto, images/pidns.proto, images/pipe-data.proto, images/pipe.proto, images/pstree.proto, images/regfile.proto, images/remap-file-path.proto, images/rlimit.proto, images/rpc.proto, images/rseq.proto, images/sa.proto, images/seccomp.proto, images/siginfo.proto, images/signalfd.proto, images/sit.proto, images/sk-inet.proto, images/sk-netlink.proto, images/sk-opts.proto, images/sk-packet.proto, images/sk-unix.proto, images/stats.proto, images/sysctl.proto, images/tcp-stream.proto, images/time.proto, images/timens.proto, images/timer.proto, images/timerfd.proto, images/tty.proto, images/tun.proto, images/userns.proto, images/utsns.proto, images/vma.proto, plugins/amdgpu/criu-amdgpu.proto, test/others/rpc/rpc.proto, test/others/unix-callback/unix.proto, test/zdtm/static/criu-rtc.proto
0/20MCP servernot applicable to this kind of software
0/40Runnable examples
Inputs used
example_dirs
has_mcp_signalno
api_schema_filesimages/apparmor.proto, images/autofs.proto, images/binfmt-misc.proto, images/bpfmap-data.proto, images/bpfmap-file.proto, images/cgroup.proto, images/core-aarch64.proto, images/core-arm.proto, images/core-loongarch64.proto, images/core-mips.proto, images/core-ppc64.proto, images/core-riscv64.proto, images/core-s390.proto, images/core-x86.proto, images/core.proto, images/cpuinfo.proto, images/creds.proto, images/eventfd.proto, images/eventpoll.proto, images/ext-file.proto, images/fdinfo.proto, images/fh.proto, images/fifo.proto, images/file-lock.proto, images/fown.proto, images/fs.proto, images/fsnotify.proto, images/ghost-file.proto, images/img-streamer.proto, images/inventory.proto, images/ipc-desc.proto, images/ipc-msg.proto, images/ipc-sem.proto, images/ipc-shm.proto, images/ipc-var.proto, images/macvlan.proto, images/memfd.proto, images/mm.proto, images/mnt.proto, images/netdev.proto, images/ns.proto, images/opts.proto, images/packet-sock.proto, images/pagemap.proto, images/pidfd.proto, images/pidns.proto, images/pipe-data.proto, images/pipe.proto, images/pstree.proto, images/regfile.proto, images/remap-file-path.proto, images/rlimit.proto, images/rpc.proto, images/rseq.proto, images/sa.proto, images/seccomp.proto, images/siginfo.proto, images/signalfd.proto, images/sit.proto, images/sk-inet.proto, images/sk-netlink.proto, images/sk-opts.proto, images/sk-packet.proto, images/sk-unix.proto, images/stats.proto, images/sysctl.proto, images/tcp-stream.proto, images/time.proto, images/timens.proto, images/timer.proto, images/timerfd.proto, images/tty.proto, images/tun.proto, images/userns.proto, images/utsns.proto, images/vma.proto, plugins/amdgpu/criu-amdgpu.proto, test/others/rpc/rpc.proto, test/others/unix-callback/unix.proto, test/zdtm/static/criu-rtc.proto
interfaces_expected_of
Excluded from scoring (no data or not applicable): MCP server. Remaining weights renormalized.

Key facts

3,957GitHub stars
100contributors
474commits, last 12 months
3days since last push
14releases
2bus factor
179open issues
PyPIpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • Could not fetch pypi package 'pycriu' from its registry
  • pypi package 'crit' points at a different repository (https://github.com/jessielaf/crit); excluded from ecosystem scoring

More detail

Star and fork history 0 ★ / 766 ⇿
0Stars
766Forks
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.

0125250375500625750732112014-012020-042026-07
Major 0Minor 0Patch 14

Each point covers 12 days.

OpenSSF Scorecard 5.4 / 10
5.4aggregate

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 · 2026-08-18 01:33 UTC

10Binary-Artifactsno binaries found in the repo
3Branch-Protectionbranch protection is not maximal on development and all release branches
10CI-Tests7 out of 7 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
2Code-ReviewFound 5/24 approved changesets -- score normalized to 2
10Contributorsproject has 35 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
9Licenselicense file detected
10Maintained30 commit(s) and 4 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
2Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 2
10SASTSAST tool is run on all commits
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 2
RegistryPackageVersion constraintManifest
PyPIprotobuflib/pyproject.toml
PyPIprotobuflib/setup.cfg
All dependencies 3

Full resolved dependency set from the GitHub dependency graph: 1 direct and 2 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
PyPIprotobufdirect
Mavenorg.apache.maven.plugins:maven-surefire-plugin2.14.1indirect
Mavenorg.testng:testng7.7.0indirect
Dependency advisories 0

This repository publishes no package the index resolves, so its own dependency graph was assessed — 2 packages, which also include development and test pins that never ship: 0 carry known advisories, of which 0 are direct. 1 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

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

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.

The message is kept through sign-in.

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 statisticsPyPI.