a-check-that-can-only-confirm skillA
a-check-that-can-only-confirm is agent-read markdown (skill) from synaptiai/synapti-marketplace: [flow-learned] Design guards, tests, lint rules and verification scripts so they are capable of failing: every check gets a mutant that must make it fire, a mutant that must leave it silent, a mutant that removes its input, and an asserted non-zero count of what it examined. Use this whenever writing or changing anything that walks, greps, scans or asserts across a codebase — a repo-wide test, a claim guard, an identity roster, a seeding check, a CI gate — including when the request is only 'add.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
How to install
mdr add synaptiai/synapti-marketplace/a-check-that-can-only-confirm@git:20260911.604a89bmdr add synaptiai/synapti-marketplace/a-check-that-can-only-confirm@sha256:2beee03490518f38Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_mt5nhgygtchdaazd)
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Versions
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 (4213 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
synaptiai/synapti-marketplace · 6 stars · license Apache-2.0 · pushed 2026-09-11 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mt5nhgygtchdaazd GET https://markdownregistry.com/api/v1/resolve?ref=synaptiai/synapti-marketplace/a-check-that-can-only-confirm GET https://markdownregistry.com/api/v1/blob/2beee03490518f38055c3bd13ef3c3ccd4bb82efe49261412c40953248142c51