Borrowing it
Nothing to install: this file belongs to sparq-org/sparq. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/sparq-org/sparq/main/.claude/skills/rust-supply-chain-attestation/SKILL.mdgit clone --depth 1 https://github.com/sparq-org/sparqWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/sparq-org/sparq/rust-supply-chain-attestation)<a href="https://agentmods.dev/skills/sparq-org/sparq/rust-supply-chain-attestation"><img src="https://agentmods.dev/badge/skills/sparq-org/sparq/rust-supply-chain-attestation/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/sparq-org/sparq/rust-supply-chain-attestation"><img src="https://agentmods.dev/badge/skills/sparq-org/sparq/rust-supply-chain-attestation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00180 | $0.02750 |
| Opus 5 | $0.00090 | $0.01375 |
| Sonnet 5 | $0.00036 | $0.00550 |
| Haiku 4.5 | $0.00018 | $0.00275 |
Grade A, and why
rust-supply-chain-attestation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Rust supply-chain attestation (sparq)
How sparq proves the integrity of what it ships — a Rust library + binaries +
container consumed as a dependency on crates.io / npm (WASM) / PyPI / ghcr.
The dominant risk for a dependency is supply-chain integrity + build
provenance, so this is the highest-fit framework family. This skill is the
cargo-specific recipe so the sbom, slsa, ssdf, cra, and openssf
engineers do not re-derive it.
NON-CANONICAL timing. No measured numbers belong in this file.
The tools, what they prove, and which framework consumes the evidence
| Tool | What it asserts | Evidence artifact | Frameworks |
|---|---|---|---|
| cargo-deny (advisories) | No known-vulnerable / yanked dependency in the tree | CI log + the daily tracking issue | SBOM, SSDF (RV), CRA (vuln-handling) |
| cargo-deny (bans) | No banned/duplicate-version crate sneaks in | CI log | SSDF (PW), SBOM |
| cargo-deny (licenses) | Every dependency is permissive / explicitly excepted | CI log + deny.toml allowlist |
SBOM (NTIA "license"), ISO 27001, CRA |
| cargo-deny (sources) | Crates come only from crates.io (no rogue git/registry) | CI log + deny.toml [sources] |
SLSA, SSDF (PS), SBOM (supplier) |
CycloneDX SBOM (cargo-cyclonedx) |
The full component inventory of the build | *.cdx.json |
SBOM (the artifact itself), CRA (Annex I §2), SSDF (PS.3) |
| VEX (CycloneDX/CSAF) | Why a flagged advisory is not exploitable in sparq | *.vex.json alongside the SBOM |
SBOM, CRA (vuln-handling) |
| cargo-auditable | The exact dependency manifest is embedded inside the binary | cargo audit bin <file> reads it |
SLSA, SBOM, SSDF |
| cargo-vet | Each dependency carries a human audit attestation | supply-chain/audits.toml |
SLSA (higher assurance), SSDF (PS) |
| attest-build-provenance | This binary was built by this workflow run (Sigstore-signed) | gh attestation verify |
SLSA (the core L2 claim), CRA, SSDF |
| OpenSSF Scorecard | Aggregate posture score (pinned deps, branch protection, SAST…) | SARIF in Security tab + public dashboard | OpenSSF, SSDF |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 137 lines · 180 tokens per session scan A 72779d802ef3
rust-supply-chain-attestation is a skill published in the GitHub repository sparq-org/sparq (12 stars, last pushed today), licensed MIT. It adds 180 tokens to every session and 2,750 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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