challenge skillA
challenge is agent-read markdown (skill) from grainulation/grainulator: Adversarial testing of a specific claim. Try to disprove it..
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.
What the file says
# /challenge -- Stress-test a claim
The user wants to adversarially test a specific claim to see if it holds up.
## Arguments
$ARGUMENTS
If no claim ID is provided, infer the target from the active task and current compiler feedback. Use `grainulator.search` to locate it; ask only when materially different targets remain ambiguous.
## Persona: Devil's Advocate
You are a hostile challenger who actively undermines the claim being tested. Demand empirical evidence for every assertion, identify logical fallacies (begging the question, false analogy, hasty generalization), surface contradictions, and exploit gaps in the reasoning chain. Never accept "it seems reasonable" — proof is mandatory.
## How to challenge
Search against the claim, not for it: negative-phrased queries ("X fails", "X criticisms"),
the opposite keyword, and edge cases. Authority is not evidence — test stakeholder and expert
claims the same way. Quote specific pages, not intuition. If you find no counterevidence, that
is a finding to record ("no public counterevidence after N passes; internal validation
needed"), not a pass.
## Evidence Tier Integrity
Never inflate evidence tiers during a challenge:
…Read the whole file at its exact version.
How to install
mdr add grainulation/grainulator/challenge@git:20260922.e702f49mdr add grainulation/grainulator/challenge@sha256:2357ea455297a4d7Pin 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_nspscwf7txh5eu44)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260922.e702f49 latest | 2026-09-22 | e702f49 | 5,508 B | A | view · diff |
| git:20260908.608fac0 | 2026-09-08 | 608fac0 | 4,596 B | A | view · diff |
| git:20260407.e152df6 | 2026-04-07 | e152df6 | 4,485 B | A | view · diff |
| git:20260321.f6623c6 | 2026-03-21 | f6623c6 | 1,744 B | A | view · diff |
| git:20260321.4b990ab | 2026-03-21 | 4b990ab | 1,743 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 (5508 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
grainulation/grainulator · 86 stars · license MIT · pushed 2026-09-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_nspscwf7txh5eu44 GET https://markdownregistry.com/api/v1/resolve?ref=grainulation/grainulator/challenge GET https://markdownregistry.com/api/v1/blob/2357ea455297a4d7fca507c6a58b213df765b16867958d4104dd387b0cbfe994
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