mpc SKILL.md skillA
mpc from sparq-org/sparq is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sparq-org/sparq/mpc@git:20261103.6eac733Pins git:20261103.6eac733 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sparq-org/sparq
- Path
skills/mpc/SKILL.md- Versions recorded
- 22
- Latest version
- git:20261103.6eac733, committed Nov 3, 2026
- First version recorded
- Jul 26, 2026
- Size
- 142,099 bytes
- Repository stars
- 13
- License
- MIT
Run a SPARQL query across multiple mutually-distrusting RDF data holders (federated MPC) — per-holder local sub-evaluation, crypto-free disclosed-key global-IRI joins, and an honest-majority Shamir secret-sharing backend for secure cumulative aggregates + hidden-value (private-key) joins. Use for confidential federated SPARQL / secret-shared aggregates / private set-intersection joins over RDF. EARLY/RESEARCH, native-only; honest-majority with RS-consistency-checked reconstruction…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# sparq-mpc — MPC over federated SPARQL
`sparq-mpc` lets a set of mutually-distrusting **holders**, each owning private RDF named graphs, jointly answer ONE SPARQL query over the *union* of their data while minimising what each holder reveals. Today it delivers a real per-holder local evaluator, a crypto-free join on disclosed global IRIs, and an honest-majority Shamir secret-sharing backend that powers secure cumulative aggregates and a hidden-value (private-key) join. The reconstruction path is **honest-majority with tamper DETECTION + abort** — and **robust correction where the `(n, t)` redundancy allows** — over RS-consistency-checked opens; the degree-`2t` equality open is **detection-only above `n = 2t + 1`**, and semi-honest is the floor when a given configuration carries no redundancy. It is **not** dishonest-majority and **not** full malicious security; each backend reports its exact level via `BackendInfo.malicious_security`.
<!-- sq-im8u: the `scaffold-caveat` anchor is single-sourced into
book/src/getting-started/capabilities.md via mdBook {{#include}}. Load-bearing honesty
caveat; keep the anchored line link-portable (inline code + bead refs only, no
…Read the whole file at its exact version.
How to install
mdr add sparq-org/sparq/mpc@sha256:63a2f4dbfd074f02The line at the top of this page pins the label git:20261103.6eac733, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_sqr2fyxzymmi75hv)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 22 versions of this file, between Jul 26, 2026 and Nov 3, 2026, about one every 5 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261103.6eac733 latest | 2026-11-03 | 6eac733 | 142,099 B | A | view · diff |
| git:20261102.78b5887 | 2026-11-02 | 78b5887 | 129,669 B | A | view · diff |
| git:20261026.f01e991 | 2026-10-26 | f01e991 | 129,414 B | A | view · diff |
| git:20261026.8dc7060 | 2026-10-26 | 8dc7060 | 127,787 B | A | view · diff |
| git:20261026.812c272 | 2026-10-26 | 812c272 | 126,475 B | A | view · diff |
| git:20261018.940cd15 | 2026-10-18 | 940cd15 | 125,377 B | A | view · diff |
| git:20261018.b870357 | 2026-10-18 | b870357 | 119,786 B | A | view · diff |
| git:20261017.1136d40 | 2026-10-17 | 1136d40 | 112,643 B | A | view · diff |
| git:20261017.aaac6b0 | 2026-10-17 | aaac6b0 | 108,370 B | A | view · diff |
| git:20261015.5d52632 | 2026-10-15 | 5d52632 | 102,233 B | A | view · diff |
| git:20261015.56b0bcc | 2026-10-15 | 56b0bcc | 99,753 B | A | view · diff |
| git:20261014.40f94dd | 2026-10-14 | 40f94dd | 99,117 B | A | view · diff |
| git:20261014.1c30870 | 2026-10-14 | 1c30870 | 94,624 B | A | view · diff |
| git:20261014.020c641 | 2026-10-14 | 020c641 | 94,338 B | A | view · diff |
| git:20261014.fec1e37 | 2026-10-14 | fec1e37 | 88,108 B | A | view · diff |
| git:20261012.fccef84 | 2026-10-12 | fccef84 | 85,163 B | A | view · diff |
| git:20261009.f0b870d | 2026-10-09 | f0b870d | 84,263 B | A | view · diff |
| git:20260801.e27c1b0 | 2026-08-01 | e27c1b0 | 84,319 B | A | view · diff |
| git:20260801.6b9d506 | 2026-08-01 | 6b9d506 | 82,564 B | A | view · diff |
| git:20260801.8935d2f | 2026-08-01 | 8935d2f | 79,534 B | A | view · diff |
| git:20260728.a5e74df | 2026-07-28 | a5e74df | 76,565 B | A | view · diff |
| git:20260726.6c818fd | 2026-07-26 | 6c818fd | 74,980 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (142099 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
sparq-org/sparq · 13 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_sqr2fyxzymmi75hv GET https://markdownregistry.com/api/v1/resolve?ref=sparq-org/sparq/mpc GET https://markdownregistry.com/api/v1/blob/63a2f4dbfd074f02406ee1d50974e60e0f7bf9a87eeff02609ef393debf43ebb
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.