Clarify that plugin workflows should use devenv when available and the repo-local Guix wrapper when devenv is unavailable.
30 KiB
Tribes Aether Plugin Agent Guide
This repository is the Tribes Aether plugin. Keep changes scoped to the plugin contract, migrations, assets, and tests owned by this repo.
Required Workflow
- Use
pluginfor plugin-aware commands inside the repo development shell:plugin validate,plugin test,plugin precommit, andplugin smoke. Outside the development shell, use the localscripts/pluginwrapper. - Prefer
devenv shell -- <command>when running repo commands from outside the development shell. Ifdevenvis unavailable, use./guix/guix-dev -- <command>rather than rawguix shellso pinned channels fromguix/channels.scmare used. - Raw
mix testis not the normal entrypoint for this repo;plugin testinvokesmix raw_testwith the host database/services and host plugin-manager paths. - Keep browser assets under the plugin asset pipeline and avoid host app internals unless the plugin API requires them.
- For AshPostgres resource changes, generate migrations with
plugin ash.codegen <name>. Useplugin ecto.migration <name>only for rare manual schema migrations that are not derived from Ash resources. - Do not edit an existing migration after it may have run; add a new migration instead.
Plugin Contract
manifest.jsonentry_modulemust point atTribeOne.TribesPlugin.Aether.Plugin.- Keep runtime spec fields aligned with
manifest.json. - Treat host integrations as capability-based plugin contracts.
usage_rules usage
A config-driven dev tool for Elixir projects to manage AGENTS.md files and agent skills from dependencies
Using Usage Rules
Many packages have usage rules, which you should thoroughly consult before taking any action. These usage rules contain guidelines and rules directly from the package authors. They are your best source of knowledge for making decisions.
Modules & functions in the current app and dependencies
When looking for docs for modules & functions that are dependencies of the current project,
or for Elixir itself, use mix usage_rules.docs
# Search a whole module
mix usage_rules.docs Enum
# Search a specific function
mix usage_rules.docs Enum.zip
# Search a specific function & arity
mix usage_rules.docs Enum.zip/1
Searching Documentation
You should also consult the documentation of any tools you are using, early and often. The best
way to accomplish this is to use the usage_rules.search_docs mix task. Once you have
found what you are looking for, use the links in the search results to get more detail. For example:
# Search docs for all packages in the current application, including Elixir
mix usage_rules.search_docs Enum.zip
# Search docs for specific packages
mix usage_rules.search_docs Req.get -p req
# Search docs for multi-word queries
mix usage_rules.search_docs "making requests" -p req
# Search only in titles (useful for finding specific functions/modules)
mix usage_rules.search_docs "Enum.zip" --query-by title
usage_rules:elixir usage
Elixir Core Usage Rules
Pattern Matching
- Use pattern matching over conditional logic when possible
- Prefer to match on function heads instead of using
if/elseorcasein function bodies %{}matches ANY map, not just empty maps. Usemap_size(map) == 0guard to check for truly empty maps
Error Handling
- Use
{:ok, result}and{:error, reason}tuples for operations that can fail - Avoid raising exceptions for control flow
- Use
withfor chaining operations that return{:ok, _}or{:error, _}
Common Mistakes to Avoid
- Elixir has no
returnstatement, nor early returns. The last expression in a block is always returned. - Don't use
Enumfunctions on large collections whenStreamis more appropriate - Avoid nested
casestatements - refactor to a singlecase,withor separate functions - Don't use
String.to_atom/1on user input (memory leak risk) - Lists and enumerables cannot be indexed with brackets. Use pattern matching or
Enumfunctions - Prefer
Enumfunctions likeEnum.reduceover recursion - When recursion is necessary, prefer to use pattern matching in function heads for base case detection
- Using the process dictionary is typically a sign of unidiomatic code
- Only use macros if explicitly requested
- There are many useful standard library functions, prefer to use them where possible
Function Design
- Use guard clauses:
when is_binary(name) and byte_size(name) > 0 - Prefer multiple function clauses over complex conditional logic
- Name functions descriptively:
calculate_total_price/2notcalc/2 - Predicate function names should not start with
isand should end in a question mark. - Names like
is_thingshould be reserved for guards
Data Structures
- Use structs over maps when the shape is known:
defstruct [:name, :age] - Prefer keyword lists for options:
[timeout: 5000, retries: 3] - Use maps for dynamic key-value data
- Prefer to prepend to lists
[new | list]notlist ++ [new]
Mix Tasks
- Use
mix helpto list available mix tasks - Use
mix help task_nameto get docs for an individual task - Read the docs and options fully before using tasks
Testing
- Run tests in a specific file with
mix test test/my_test.exsand a specific test with the line numbermix test path/to/test.exs:123 - Limit the number of failed tests with
mix test --max-failures n - Use
@tagto tag specific tests, andmix test --only tagto run only those tests - Use
assert_raisefor testing expected exceptions:assert_raise ArgumentError, fn -> invalid_function() end - Use
mix help testto for full documentation on running tests
Debugging
- Use
dbg/1to print values while debugging. This will display the formatted value and other relevant information in the console.
usage_rules:otp usage
OTP Usage Rules
GenServer Best Practices
- Keep state simple and serializable
- Handle all expected messages explicitly
- Use
handle_continue/2for post-init work - Implement proper cleanup in
terminate/2when necessary
Process Communication
- Use
GenServer.call/3for synchronous requests expecting replies - Use
GenServer.cast/2for fire-and-forget messages. - When in doubt, use
callovercast, to ensure back-pressure - Set appropriate timeouts for
call/3operations
Fault Tolerance
- Set up processes such that they can handle crashing and being restarted by supervisors
- Use
:max_restartsand:max_secondsto prevent restart loops
Task and Async
- Use
Task.Supervisorfor better fault tolerance - Handle task failures with
Task.yield/2orTask.shutdown/2 - Set appropriate task timeouts
- Use
Task.async_stream/3for concurrent enumeration with back-pressure
phoenix:ecto usage
Ecto Guidelines
- Always preload Ecto associations in queries when they'll be accessed in templates, ie a message that needs to reference the
message.user.email - Remember
import Ecto.Queryand other supporting modules when you writeseeds.exs Ecto.Schemafields always use the:stringtype, even for:text, columns, ie:field :name, :stringEcto.Changeset.validate_number/2DOES NOT SUPPORT the:allow_niloption. By default, Ecto validations only run if a change for the given field exists and the change value is not nil, so such as option is never needed- You must use
Ecto.Changeset.get_field(changeset, :field)to access changeset fields - Fields which are set programmatically, such as
user_id, must not be listed incastcalls or similar for security purposes. Instead they must be explicitly set when creating the struct - Always invoke
mix ecto.gen.migration migration_name_using_underscoreswhen generating migration files, so the correct timestamp and conventions are applied
phoenix:html usage
Phoenix HTML guidelines
-
Phoenix templates always use
~Hor .html.heex files (known as HEEx), never use~E -
Always use the imported
Phoenix.Component.form/1andPhoenix.Component.inputs_for/1function to build forms. Never usePhoenix.HTML.form_fororPhoenix.HTML.inputs_foras they are outdated -
When building forms always use the already imported
Phoenix.Component.to_form/2(assign(socket, form: to_form(...))and<.form for={@form} id="msg-form">), then access those forms in the template via@form[:field] -
Always add unique DOM IDs to key elements (like forms, buttons, etc) when writing templates, these IDs can later be used in tests (
<.form for={@form} id="product-form">) -
For "app wide" template imports, you can import/alias into the
my_app_web.ex'shtml_helpersblock, so they will be available to all LiveViews, LiveComponent's, and all modules that douse MyAppWeb, :html(replace "my_app" by the actual app name) -
Elixir supports
if/elsebut does NOT supportif/else iforif/elsif. Never useelse iforelseifin Elixir, always usecondorcasefor multiple conditionals.Never do this (invalid):
<%= if condition do %> ... <% else if other_condition %> ... <% end %>Instead always do this:
<%= cond do %> <% condition -> %> ... <% condition2 -> %> ... <% true -> %> ... <% end %> -
HEEx require special tag annotation if you want to insert literal curly's like
{or}. If you want to show a textual code snippet on the page in a<pre>or<code>block you must annotate the parent tag withphx-no-curly-interpolation:<code phx-no-curly-interpolation> let obj = {key: "val"} </code>Within
phx-no-curly-interpolationannotated tags, you can use{and}without escaping them, and dynamic Elixir expressions can still be used with<%= ... %>syntax -
HEEx class attrs support lists, but you must always use list
[...]syntax. You can use the class list syntax to conditionally add classes, always do this for multiple class values:<a class={[ "px-2 text-white", @some_flag && "py-5", if(@other_condition, do: "border-red-500", else: "border-blue-100"), ... ]}>Text</a>and always wrap
if's inside{...}expressions with parens, like done above (if(@other_condition, do: "...", else: "..."))and never do this, since it's invalid (note the missing
[and]):<a class={ "px-2 text-white", @some_flag && "py-5" }> ... => Raises compile syntax error on invalid HEEx attr syntax -
Never use
<% Enum.each %>or non-for comprehensions for generating template content, instead always use<%= for item <- @collection do %> -
HEEx HTML comments use
<%!-- comment --%>. Always use the HEEx HTML comment syntax for template comments (<%!-- comment --%>) -
HEEx allows interpolation via
{...}and<%= ... %>, but the<%= %>only works within tag bodies. Always use the{...}syntax for interpolation within tag attributes, and for interpolation of values within tag bodies. Always interpolate block constructs (if, cond, case, for) within tag bodies using<%= ... %>.Always do this:
<div id={@id}> {@my_assign} <%= if @some_block_condition do %> {@another_assign} <% end %> </div>and Never do this – the program will terminate with a syntax error:
<%!-- THIS IS INVALID NEVER EVER DO THIS --%> <div id="<%= @invalid_interpolation %>"> {if @invalid_block_construct do} {end} </div>
phoenix:liveview usage
Phoenix LiveView guidelines
- Never use the deprecated
live_redirectandlive_patchfunctions, instead always use the<.link navigate={href}>and<.link patch={href}>in templates, andpush_navigateandpush_patchfunctions LiveViews - Avoid LiveComponent's unless you have a strong, specific need for them
- LiveViews should be named like
AppWeb.WeatherLive, with aLivesuffix. When you go to add LiveView routes to the router, the default:browserscope is already aliased with theAppWebmodule, so you can just dolive "/weather", WeatherLive
LiveView streams
-
Always use LiveView streams for collections for assigning regular lists to avoid memory ballooning and runtime termination with the following operations:
- basic append of N items -
stream(socket, :messages, [new_msg]) - resetting stream with new items -
stream(socket, :messages, [new_msg], reset: true)(e.g. for filtering items) - prepend to stream -
stream(socket, :messages, [new_msg], at: -1) - deleting items -
stream_delete(socket, :messages, msg)
- basic append of N items -
-
When using the
stream/3interfaces in the LiveView, the LiveView template must 1) always setphx-update="stream"on the parent element, with a DOM id on the parent element likeid="messages"and 2) consume the@streams.stream_namecollection and use the id as the DOM id for each child. For a call likestream(socket, :messages, [new_msg])in the LiveView, the template would be:<div id="messages" phx-update="stream"> <div :for={{id, msg} <- @streams.messages} id={id}> {msg.text} </div> </div> -
LiveView streams are not enumerable, so you cannot use
Enum.filter/2orEnum.reject/2on them. Instead, if you want to filter, prune, or refresh a list of items on the UI, you must refetch the data and re-stream the entire stream collection, passing reset: true:def handle_event("filter", %{"filter" => filter}, socket) do # re-fetch the messages based on the filter messages = list_messages(filter) {:noreply, socket |> assign(:messages_empty?, messages == []) # reset the stream with the new messages |> stream(:messages, messages, reset: true)} end -
LiveView streams do not support counting or empty states. If you need to display a count, you must track it using a separate assign. For empty states, you can use Tailwind classes:
<div id="tasks" phx-update="stream"> <div class="hidden only:block">No tasks yet</div> <div :for={{id, task} <- @streams.tasks} id={id}> {task.name} </div> </div>The above only works if the empty state is the only HTML block alongside the stream for-comprehension.
-
When updating an assign that should change content inside any streamed item(s), you MUST re-stream the items along with the updated assign:
def handle_event("edit_message", %{"message_id" => message_id}, socket) do message = Chat.get_message!(message_id) edit_form = to_form(Chat.change_message(message, %{content: message.content})) # re-insert message so @editing_message_id toggle logic takes effect for that stream item {:noreply, socket |> stream_insert(:messages, message) |> assign(:editing_message_id, String.to_integer(message_id)) |> assign(:edit_form, edit_form)} endAnd in the template:
<div id="messages" phx-update="stream"> <div :for={{id, message} <- @streams.messages} id={id} class="flex group"> {message.username} <%= if @editing_message_id == message.id do %> <%!-- Edit mode --%> <.form for={@edit_form} id="edit-form-#{message.id}" phx-submit="save_edit"> ... </.form> <% end %> </div> </div> -
Never use the deprecated
phx-update="append"orphx-update="prepend"for collections
LiveView JavaScript interop
- Remember anytime you use
phx-hook="MyHook"and that JS hook manages its own DOM, you must also set thephx-update="ignore"attribute - Always provide an unique DOM id alongside
phx-hookotherwise a compiler error will be raised
LiveView hooks come in two flavors, 1) colocated js hooks for "inline" scripts defined inside HEEx,
and 2) external phx-hook annotations where JavaScript object literals are defined and passed to the LiveSocket constructor.
Inline colocated js hooks
Never write raw embedded <script> tags in heex as they are incompatible with LiveView.
Instead, always use a colocated js hook script tag (:type={Phoenix.LiveView.ColocatedHook})
when writing scripts inside the template:
<input type="text" name="user[phone_number]" id="user-phone-number" phx-hook=".PhoneNumber" />
<script :type={Phoenix.LiveView.ColocatedHook} name=".PhoneNumber">
export default {
mounted() {
this.el.addEventListener("input", e => {
let match = this.el.value.replace(/\D/g, "").match(/^(\d{3})(\d{3})(\d{4})$/)
if(match) {
this.el.value = `${match[1]}-${match[2]}-${match[3]}`
}
})
}
}
</script>
- colocated hooks are automatically integrated into the app.js bundle that imports the generated
phoenix-colocated/<otp_app>module - external Tribes plugin OTP apps are not auto-imported by the host
app.jsbundle; useassets.global_jspluswindow.TribesPluginHooksfor plugin hooks - colocated hooks names MUST ALWAYS start with a
.prefix, i.e..PhoneNumber
External phx-hook
External JS hooks (<div id="myhook" phx-hook="MyHook">) in Tribes plugins must be registered by a plugin JS bundle listed in manifest.json assets.global_js; the host merges window.TribesPluginHooks into the LiveSocket constructor:
window.TribesPluginHooks = window.TribesPluginHooks || {};
window.TribesPluginHooks.MyHook = {
mounted() { ... }
};
Pushing events between client and server
Use LiveView's push_event/3 when you need to push events/data to the client for a phx-hook to handle.
Always return or rebind the socket on push_event/3 when pushing events:
# re-bind socket so we maintain event state to be pushed
socket = push_event(socket, "my_event", %{...})
# or return the modified socket directly:
def handle_event("some_event", _, socket) do
{:noreply, push_event(socket, "my_event", %{...})}
end
Pushed events can then be picked up in a JS hook with this.handleEvent:
mounted() {
this.handleEvent("my_event", data => console.log("from server:", data));
}
Clients can also push an event to the server and receive a reply with this.pushEvent:
mounted() {
this.el.addEventListener("click", e => {
this.pushEvent("my_event", { one: 1 }, reply => console.log("got reply from server:", reply));
})
}
Where the server handled it via:
def handle_event("my_event", %{"one" => 1}, socket) do
{:reply, %{two: 2}, socket}
end
LiveView tests
-
Phoenix.LiveViewTestmodule andLazyHTML(included) for making your assertions -
Form tests are driven by
Phoenix.LiveViewTest'srender_submit/2andrender_change/2functions -
Come up with a step-by-step test plan that splits major test cases into small, isolated files. You may start with simpler tests that verify content exists, gradually add interaction tests
-
Always reference the key element IDs you added in the LiveView templates in your tests for
Phoenix.LiveViewTestfunctions likeelement/2,has_element/2, selectors, etc -
Never tests again raw HTML, always use
element/2,has_element/2, and similar:assert has_element?(view, "#my-form") -
Instead of relying on testing text content, which can change, favor testing for the presence of key elements
-
Focus on testing outcomes rather than implementation details
-
Be aware that
Phoenix.Componentfunctions like<.form>might produce different HTML than expected. Test against the output HTML structure, not your mental model of what you expect it to be -
When facing test failures with element selectors, add debug statements to print the actual HTML, but use
LazyHTMLselectors to limit the output, ie:html = render(view) document = LazyHTML.from_fragment(html) matches = LazyHTML.filter(document, "your-complex-selector") IO.inspect(matches, label: "Matches")
Form handling
Creating a form from params
If you want to create a form based on handle_event params:
def handle_event("submitted", params, socket) do
{:noreply, assign(socket, form: to_form(params))}
end
When you pass a map to to_form/1, it assumes said map contains the form params, which are expected to have string keys.
You can also specify a name to nest the params:
def handle_event("submitted", %{"user" => user_params}, socket) do
{:noreply, assign(socket, form: to_form(user_params, as: :user))}
end
Creating a form from changesets
When using changesets, the underlying data, form params, and errors are retrieved from it. The :as option is automatically computed too. E.g. if you have a user schema:
defmodule MyApp.Users.User do
use Ecto.Schema
...
end
And then you create a changeset that you pass to to_form:
%MyApp.Users.User{}
|> Ecto.Changeset.change()
|> to_form()
Once the form is submitted, the params will be available under %{"user" => user_params}.
In the template, the form form assign can be passed to the <.form> function component:
<.form for={@form} id="todo-form" phx-change="validate" phx-submit="save">
<.input field={@form[:field]} type="text" />
</.form>
Always give the form an explicit, unique DOM ID, like id="todo-form".
Avoiding form errors
Always use a form assigned via to_form/2 in the LiveView, and the <.input> component in the template. In the template always access forms this:
<%!-- ALWAYS do this (valid) --%>
<.form for={@form} id="my-form">
<.input field={@form[:field]} type="text" />
</.form>
And never do this:
<%!-- NEVER do this (invalid) --%>
<.form for={@changeset} id="my-form">
<.input field={@changeset[:field]} type="text" />
</.form>
- You are FORBIDDEN from accessing the changeset in the template as it will cause errors
- Never use
<.form let={f} ...>in the template, instead always use<.form for={@form} ...>, then drive all form references from the form assign as in@form[:field]. The UI should always be driven by ato_form/2assigned in the LiveView module that is derived from a changeset
phoenix:phoenix usage
Phoenix guidelines
-
Remember Phoenix router
scopeblocks include an optional alias which is prefixed for all routes within the scope. Always be mindful of this when creating routes within a scope to avoid duplicate module prefixes. -
You never need to create your own
aliasfor route definitions! Thescopeprovides the alias, ie:scope "/admin", AppWeb.Admin do pipe_through :browser live "/users", UserLive, :index endthe UserLive route would point to the
AppWeb.Admin.UserLivemodule -
Phoenix.Viewno longer is needed or included with Phoenix, don't use it
ash usage
A declarative, extensible framework for building Elixir applications.
Rules for working with Ash
Understanding Ash
Ash is an opinionated, composable framework for building applications in Elixir. It provides a declarative approach to modeling your domain with resources at the center. Read documentation before attempting to use its features. Do not assume that you have prior knowledge of the framework or its conventions.
ash:actions usage
ash:migrations usage
ash:testing usage
tribes_plugin_api usage
tribes_plugin_api
Tribes Plugin API Usage Rules
These rules apply when implementing the public plugin contract from
tribes_plugin_api. For deeper context from a plugin checkout, see
../tribes/docs/plugins.md; from this package
source directory, the same document is at ../docs/plugins.md.
Entry Modules
- Implement the runtime contract with
Tribes.PluginorTribes.Plugin.Base. - Prefer
use Tribes.Plugin.Base, otp_app: :your_pluginfor normal plugins; it readsmanifest.jsonand fills the manifest-backed spec fields. - Keep plugin modules under an owner-controlled namespace, such as
TribeOne.TribesPlugin.<Plugin>.Pluginfor first-party plugins orAcmeCorp.TribesPlugins.Foo.Pluginfor third-party plugins. The entry module must end in.Pluginand should be the module named bymanifest.json. register/1must return aTribes.Plugin.Specstruct or a map/struct that validates into that spec.
Spec Discipline
- Fields mirrored from
manifest.jsonmust match exactly after capability normalization:name,version,provider_priority,provides,requires, andenhances_with. - Use
%Tribes.Plugin.Spec.NavItem{}and%Tribes.Plugin.Spec.Page{}or maps with only the documented keys. Unknown keys fail validation. - Use atom modules for
live_view, plug modules, hook modules,ui_components, andash_domains; do not pass module names as strings in the runtime spec. - Keep
childrenas valid supervisor child specs and make plugin processes restartable under normal OTP supervision rules. - Run
scripts/plugin validateormix tribes.plugin.validatebefore relying on runtime registration behavior.
Pages, Layouts, And Auth
- Use
Tribes.Plugin.Layouts.appfor pages that should render inside host chrome. - Use
Tribes.Plugin.LiveUserAuthon plugin LiveViews when they need host user context. - Avoid
use TribesWeb, :live_viewin standalone release-facing plugin code; usePhoenix.LiveViewand public plugin/UI APIs instead.
Config Schema
config_schemais for small admin-editable runtime defaults rendered by the host UI and stored throughTribes.ConfigStore.- Group IDs and setting keys must use the identifier format accepted by the validator: lowercase segments with letters, digits, underscores, and dots.
- Supported setting types are
:string,:text,:boolean,:integer,:number,:enum,:list, and:object. - Use
optionsonly with:enum, and provide stable stored values rather than display text as the value.
tribes usage
tribes
Tribes Plugin Development Rules
These rules are for external Tribes plugin projects that depend on the host
checkout during development. For the full contract, see
../tribes/docs/plugins.md and
../tribes/docs/ui.md.
Plugin Boundaries
- Treat plugins as separate OTP applications. The host discovers them through
manifest.jsonand a singleTribes.Pluginentry module, not by reaching into plugin internals. - Keep plugin contributions inside the supported runtime spec fields:
nav_items,pages,api_routes,plugs,children,global_js,global_css,migrations_path,ui_components,hooks,ash_domains, andconfig_schema. - Do not mutate host routers, host Ash domains, endpoint config, or host supervision trees directly from plugin code.
- Plugin-owned pages and API routes should live under plugin-owned paths. Avoid taking over unrelated host sections.
Manifest And Runtime Spec
manifest.jsonis the static build/runtime contract. Keepname,version,entry_module,host_api,otp_app,provides,requires, andenhances_withaligned with the runtime spec returned byregister/1.entry_modulemust be a valid module ending in.Pluginunder an owner-controlled namespace.- Capability versions are discrete breaking-change markers such as
org.tribe-one.caps.ui@1ororg.tribe-one.caps.social@1, not semver. Framework APIs are part of thehost_apifoundation, not separate manifest capabilities. - Use
requiresfor hard dependencies andenhances_withfor optional integrations that the plugin can run without. - Run
scripts/plugin validateafter changingmanifest.jsonor the runtime plugin spec.
UI And Assets
- Plugin LiveViews that use host chrome should render with
Tribes.Plugin.Layouts.appand keeporg.tribe-one.caps.ui@1inmanifest.jsonrequires. - Consumers should target the
org.tribe-one.caps.ui@1facade withuse Tribes.UIorimport Tribes.UI.Components, not a concrete provider module. - Declare browser assets in
manifest.jsonunderassets.global_jsandassets.global_css; the host serves them through the plugin asset surface. - Register plugin LiveView hooks from
assets.global_jsbundles viawindow.TribesPluginHooks. Phoenix colocated hooks are not auto-imported from external plugin OTP apps by the hostapp.jsbundle. - Keep CSS selectors scoped to the plugin, normally with a plugin-specific root class.
Runtime Config
- Use plugin OTP app env only for boot-time wiring that is genuinely static.
- For mutable runtime settings, use
Tribes.ConfigStoreand expose small editable defaults throughconfig_schemain the plugin spec. config_schemais validated by the host and rendered by Tribes in the admin settings UI. It describes fields only; values are stored as ConfigStore overrides when an admin saves them.- If
config_schema.namespaceis omitted, the host usesplugin.<plugin_name>. - Plugins should read ConfigStore values with the same defaults declared in the schema, because saving a value equal to the default deletes the override.
- Do not expose secrets, node-local paths, ports, database URLs, TLS material,
package selection, or deployment state through
config_schema.
Synced Data
- If a plugin adds Ash resources that should replicate across the cluster, add
them deliberately to the plugin spec
ash_domainsand document replication semantics in the plugin contract docs. - Use
AshNostrSynconly for resources whose persisted state is meant to be cluster-synced. Do not enable it as a default on every plugin resource.