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/relay-client/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/relay-client)<a href="https://agentmods.dev/skills/vitorpamplona/amethyst/relay-client"><img src="https://agentmods.dev/badge/skills/vitorpamplona/amethyst/relay-client/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/relay-client"><img src="https://agentmods.dev/badge/skills/vitorpamplona/amethyst/relay-client.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 | $0.01692 |
| Opus 5.5 | $0.00000 | $0.00677 |
| Sonnet 5.5 | $0.00000 | $0.00338 |
| Haiku 4.5 | $0.00000 | $0.00169 |
Grade A, and why
relay-client 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 5d 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 — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Relay client: screen-scoped subscriptions
How a composable gets events from relays only while it is on screen. Headless code (amy,
geode, tests, one-shot fetches) does not use this layer: it uses the INostrClient
extensions — see AGENTS.md › Feature Workflow ("Relay client ops already exist").
Where it lives
commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/relayClient/— the headless half: one package per feature (chess/,communities/,home/,thread/,user/,event/, …) holding query states, filter assemblers and sub-assemblers;composeSubscriptionManagers/,eoseManagers/,subscriptions/(ExplainedFilter,SubPurpose),assemblers/(shared ones:MetadataFilterAssembler,ReactionsFilterAssembler,ContactCardFilters.kt),oneshot/,paging/,preload/.reqCommand/RelaySubscriptionsCoordinator.kt— owns one instance of every assembler (account,home,userFinder,eventFinder,chess,community, …). Screens reach it asaccountViewModel.dataSources()(BaseAccountViewModel.dataSources).commonsUI/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/relayClient/— the@Composableentry points, same package names:observeUser*,EventFinderFilterAssemblerSubscription,KeyDataSourceSubscription,LifecycleAwareKeyDataSourceSubscription, and per-feature*FilterAssemblerSubscriptions.
First choice: observeUser* and EventFinder
Before writing any assembler, check whether these already load what you need:
- Users (
commonsUI/.../relayClient/user/UserMetadataObservers.kt):observeUserInfo,observeUserPicture,observeUserBanner,observeUserAboutMe,observeUserName(user)each openUserFinderFilterAssemblerSubscription(user)and return aState. Metadata, relay lists, reports and contact cards load for on-screen users only, batched into one REQ per relay for the whole visible set. ALazyColumncomposes only the visible window, so this is "load what's on screen" for free. - Notes (
commonsUI/.../relayClient/event/EventFinderFilterAssemblerSubscription.kt):EventFinderFilterAssemblerSubscription(note)loads the note's reactions, zaps, reposts and replies while composed; the observers inevent/EventObservers.kt/AccountEventObservers.ktsit on top of it. - Both read
LocalUserFinder,LocalUserFinderAccountandLocalEventFinder, provided once incommonsUI/.../ui/app/AmethystApp.ktfromdataSources(). Their defaults areerror(...), so they must never be reached from a composition with no relay client (e.g. the Android:nappletprocess).
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 5d ago Changed · -1 lines 3f5bf0d1dfde
- 15d ago Changed 137ec7a288d8
- 25d ago Changed · -36 lines · -123 tokens per session de029e8ba96e
- 1mo ago Changed 56a6719d318a
- 2mo ago First seen · 162 lines · 123 tokens per session scan A 22ee8c0b38c5
relay-client 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 1,692 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.
relay-client compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| relay-clientvitorpamplona/amethyst | Skill | 1.6k | yesterday | MIT | A | 0 | Claude Code |
| pagination-patternsahmed3elshaer/everything-claude-code-mobile | Skill | 66 | 4mo ago | MIT | A | 32 | Claude Code |
| offline-firstahmed3elshaer/everything-claude-code-mobile | Skill | 66 | 4mo ago | MIT | A | 26 | Claude Code |
| sceneviewsceneview/sceneview | Skill | 1.4k | yesterday | Apache-2.0 | A | 156 | Codex |
| 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 |
| deliver-specchrisbanes/skills | Skill | 1.1k | yesterday | Apache-2.0 | A | 33 | Claude Code, Codex |