Amethyst is an Android client for Nostr, a social network protocol that lets people control their own social activity and connections. People use it to read and publish Nostr content, follow accounts, and exchange encrypted direct messages from Android and other supported platforms. The catalogue add-ons support workflows for developing or operating the client.
Borrowing it
Nothing to install: this file belongs to vitorpamplona/amethyst. 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/vitorpamplona/amethyst/main/.claude/skills/nip85-trusted-assertions/SKILL.mdgit clone --depth 1 https://github.com/vitorpamplona/amethystWrote 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/vitorpamplona/amethyst/nip85-trusted-assertions)<a href="https://agentmods.dev/skills/vitorpamplona/amethyst/nip85-trusted-assertions"><img src="https://agentmods.dev/badge/skills/vitorpamplona/amethyst/nip85-trusted-assertions/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/vitorpamplona/amethyst/nip85-trusted-assertions"><img src="https://agentmods.dev/badge/skills/vitorpamplona/amethyst/nip85-trusted-assertions.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 | $0.00000 | $0.03650 |
| Opus 5.5 | $0.00000 | $0.01460 |
| Sonnet 5.5 | $0.00000 | $0.00730 |
| Haiku 4.5 | $0.00000 | $0.00365 |
Grade A, and why
nip85-trusted-assertions 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 25d 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 — 239 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NIP-85 Trusted Assertions — the Quartz model
Package: quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip85TrustedAssertions/.
NIP-85 is still an evolving spec; this package is the operative definition of what
Amethyst-family software writes and reads. This skill states the model (who signs what about
whom), the exact kind/d-tag/tag vocabulary, and what consumers may — and may not — assume.
The model in one paragraph
An assertion is signed by the asserting party (a trust provider service, or the user
themself) about a subject named in the d-tag. All assertion kinds are addressable, so
"latest card by provider P about subject S" is just the addressable coordinate
(kind, P, S) and supersession is standard NIP-01 latest-wins. Discovery is the observer's
kind 10040 list: each entry says "for metric M on kind K, I trust provider P — fetch
their assertions at relay R". Quartz enforces none of this cryptographically beyond normal
event signatures; the 10040→assertion link is consumer-side convention (see
"Authorization" below).
Kind map
| Kind | Class | Kind class | d-tag = the subject | Content |
|---|---|---|---|---|
| 10040 | list/TrustProviderListEvent |
replaceable | (none — always "") |
NIP-44 private provider entries (optional) |
| 30382 | users/UserAssertionEvent |
addressable | target user's pubkey (hex) | NIP-44 private tags (petname/summary/emoji) |
| 30383 | events/EventAssertionEvent |
addressable | target event id (hex) | "" |
| 30384 | addressables/AddressableAssertionEvent |
addressable | target coordinate kind:pubkey:dtag |
"" |
| 30385 | externalIds/ExternalIdAssertionEvent |
addressable | external identifier (e.g. isbn:978-0-13-468599-1) |
"" |
Addresses: UserAssertionEvent.createAddress(owner, target) → Address(30382, owner, target)
(owner = signer, target = subject). TrustProviderListEvent.createAddress(pubKey) uses
FIXED_D_TAG = "". AssertionEventTest.eventKindsAreCorrect pins all five numbers.
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.
- 25d ago Changed · +6 lines · -148 tokens per session f32481e420f6
- 1mo ago Changed 1e75bb1d2957
- 2mo ago First seen · 233 lines · 148 tokens per session scan A 619a1839c8c2
nip85-trusted-assertions is a skill published in the GitHub repository vitorpamplona/amethyst (1,620 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,650 tokens. 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 2026-08-30.
nip85-trusted-assertions compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nip85-trusted-assertionsvitorpamplona/amethyst | Skill | 1.6k | yesterday | MIT | A | 0 | Claude Code |
| burner-walletsepivip/SeekerClaw | Skill | 319 | 9d ago | MIT | A | 91 | Claude Code, Codex |
| crypto-pricessepivip/SeekerClaw | Skill | 319 | 9d ago | MIT | A | 70 | Claude Code, Codex |
| sceneviewsceneview/sceneview | Skill | 1.4k | yesterday | Apache-2.0 | A | 156 | Codex |
| compose-focus-navigationchrisbanes/skills | Skill | 1.1k | yesterday | Apache-2.0 | A | 41 | Claude Code |
| kotlin-androidericrisco/rsc-harness | Skill | 503 | 2d ago | MIT | A | 78 | Claude Code, Codex |
| compose-multiplatformericrisco/rsc-harness | Skill | 503 | 2d ago | MIT | A | 80 | Claude Code, Codex |