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@clerk/testing

Utilities to help you create E2E test suites for apps using Clerk

72
Versions
MIT
License
No
Install Scripts
Verified
Provenance

Supply chain provenance

Status for the latest visible version.

SLSA provenance attestation npm registry signatures No source commit

Maintainers

colinclerkbradenclerknikosdouvlischanioxarisjescalanbkalowdominic-clerkmwickett

Keywords

authauthenticationpasswordlesssessionjwtplaywrightcypresstestinge2e

Accepted risks

Findings the reviewer chose to accept rather than block on.

SourceRuleReasonAccepted byWhen
provenance publisher-changed AI (provenance): Publisher dominic-clerk is a Clerk org member; transition from nikosdouvlis is a legitimate team change. SLSA provenance confirms CI/CD build. ai
dependencies unvetted-peer-dep:cypress AI (dependencies): cypress is an expected peer dependency for a testing utility package like @clerk/testing; stable for this package. ai
dependencies unvetted-dep:@clerk/shared AI (dependencies): @clerk/shared is a first-party Clerk organization package; unvetted status is a registry artifact, not a real risk for this ecosystem package. ai
dependencies unvetted-dep:@clerk/backend AI (dependencies): @clerk/backend is a first-party Clerk organization package; unvetted status is a registry artifact, not a real risk for this ecosystem package. ai

Versions (showing 72 of 72)

Version Deps Published
2.0.35 3 / 2
2.0.34 3 / 2
2.0.33 3 / 2
2.0.32 3 / 2
2.0.31 3 / 2
2.0.30 3 / 2
2.0.29 3 / 2
2.0.28 3 / 2
2.0.27 3 / 2
2.0.26 3 / 2
2.0.25 3 / 2
2.0.24 3 / 2
2.0.23 3 / 2
2.0.22 3 / 2
2.0.21 3 / 2
2.0.20 3 / 2
2.0.19 3 / 2
2.0.18 3 / 2
2.0.17 3 / 2
2.0.16 3 / 2
2.0.15 3 / 2
2.0.14 3 / 2
2.0.13 3 / 2
2.0.12 3 / 2
2.0.11 3 / 2
2.0.8 3 / 2
2.0.7 3 / 2
2.0.6 3 / 2
2.0.5 3 / 2
2.0.4 3 / 2
2.0.2 3 / 2
2.0.1 3 / 2
2.0.0 3 / 2
1.14.8 4 / 2
1.14.7 4 / 2
1.14.6 4 / 2
1.14.5 4 / 2
1.14.4 4 / 2
1.14.3 4 / 2
1.14.2 4 / 2
1.14.1 4 / 2
1.14.0 4 / 2
1.13.38 4 / 2
1.13.37 4 / 2
1.13.36 4 / 2
1.13.35 4 / 2
1.13.34 4 / 2
1.13.33 4 / 2
1.13.32 4 / 2
1.13.31 4 / 2
1.13.30 4 / 2
1.13.29 4 / 2
1.13.28 4 / 2
1.13.27 4 / 2
1.13.26 4 / 2
1.13.25 4 / 2
1.13.24 4 / 2
1.13.23 4 / 2
1.13.22 4 / 2
1.13.21 4 / 2
1.13.20 4 / 2
1.13.19 4 / 2
1.13.18 4 / 2
1.13.17 4 / 2
1.13.16 4 / 2
1.13.15 4 / 2
1.13.14 4 / 2
1.13.13 4 / 2
1.13.12 4 / 2
1.13.11 4 / 2
1.13.10 4 / 2
1.13.9 4 / 2

v2.0.35

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.34

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.33

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.32

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.31

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.30

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.29

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.28

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.27

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.26

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.25

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.24

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.23

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.21

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.20

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.19

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.18

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.17

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.16

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.15

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.14

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.13

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.12

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.11

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.8

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.7

2 findings
HIGH Publisher changed: nikosdouvlis → GitHub Actions (on 2026-03-25) provenance

This version was published by a different npm account than previous versions on 2026-03-25. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.6

2 findings
HIGH Publisher changed: nikosdouvlis → GitHub Actions (on 2026-03-20) provenance

This version was published by a different npm account than previous versions on 2026-03-20. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.5

2 findings
HIGH Publisher changed: nikosdouvlis → GitHub Actions (on 2026-03-17) provenance

This version was published by a different npm account than previous versions on 2026-03-17. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.4

2 findings
HIGH Publisher changed: nikosdouvlis → GitHub Actions (on 2026-03-11) provenance

This version was published by a different npm account than previous versions on 2026-03-11. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.2

2 findings
HIGH Publisher changed: nikosdouvlis → GitHub Actions (on 2026-03-09) provenance

This version was published by a different npm account than previous versions on 2026-03-09. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.1

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-03-04) provenance

This version was published by a different npm account than previous versions on 2026-03-04. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v2.0.0

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-03-03) provenance

This version was published by a different npm account than previous versions on 2026-03-03. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.8

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.7

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.6

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.5

2 findings
HIGH Publisher changed: GitHub Actions → dominic-clerk (on 2026-04-15) provenance

This version was published by a different npm account than previous versions on 2026-04-15. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.4

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-03-20) provenance

This version was published by a different npm account than previous versions on 2026-03-20. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.3

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-27) provenance

This version was published by a different npm account than previous versions on 2026-02-27. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.2

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-26) provenance

This version was published by a different npm account than previous versions on 2026-02-26. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.1

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-23) provenance

This version was published by a different npm account than previous versions on 2026-02-23. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.14.0

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-20) provenance

This version was published by a different npm account than previous versions on 2026-02-20. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.38

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-18) provenance

This version was published by a different npm account than previous versions on 2026-02-18. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.37

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-17) provenance

This version was published by a different npm account than previous versions on 2026-02-17. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.36

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-13) provenance

This version was published by a different npm account than previous versions on 2026-02-13. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.35

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-05) provenance

This version was published by a different npm account than previous versions on 2026-02-05. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.34

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-02-04) provenance

This version was published by a different npm account than previous versions on 2026-02-04. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.33

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-01-30) provenance

This version was published by a different npm account than previous versions on 2026-01-30. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.32

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-01-28) provenance

This version was published by a different npm account than previous versions on 2026-01-28. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.31

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-01-23) provenance

This version was published by a different npm account than previous versions on 2026-01-23. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.30

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-01-21) provenance

This version was published by a different npm account than previous versions on 2026-01-21. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.29

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-01-16) provenance

This version was published by a different npm account than previous versions on 2026-01-16. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.28

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-01-08) provenance

This version was published by a different npm account than previous versions on 2026-01-08. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.27

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2026-01-07) provenance

This version was published by a different npm account than previous versions on 2026-01-07. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.26

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2025-12-19) provenance

This version was published by a different npm account than previous versions on 2025-12-19. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.25

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2025-12-18) provenance

This version was published by a different npm account than previous versions on 2025-12-18. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.24

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2025-12-15) provenance

This version was published by a different npm account than previous versions on 2025-12-15. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.23

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2025-12-10) provenance

This version was published by a different npm account than previous versions on 2025-12-10. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.22

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2025-12-08) provenance

This version was published by a different npm account than previous versions on 2025-12-08. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.21

2 findings
HIGH Publisher changed: nikosdouvlis → dominic-clerk (on 2025-12-05) provenance

This version was published by a different npm account than previous versions on 2025-12-05. This could indicate a legitimate maintainer transition or an account compromise.

INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.20

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.19

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.18

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.17

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.16

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.15

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.14

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.13

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.12

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.11

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.10

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.

v1.13.9

1 finding
INFO Has SLSA provenance attestation provenance

Published via CI/CD with Sigstore attestation (predicate: https://slsa.dev/provenance/v1). This is the strongest supply chain integrity signal.