Merge branch 'main' into combobox-a11y

* main: (26 commits) Center figure attachments and use normal size for Save Changes button Re-record message response VCR cassette Improve link rendering Give Fizzy Ask context about who it's talking to Show only published cards to Fizzy Ask Remove unique index Update to latest lexxy (merged renamed branch) Fix lexxy events prefix Rename Action Text Lexical => Lexxy Ensure empty/new transcript isn't narrow Source order We need this for the events index Safari apparently doesn't apply `position` in its internal stylesheet Don't allow the pattern to show through buttons Button is now in the column, merge fix Style tweaks to bar placeholder Any press of `esc` should close the dialog Copy Fix type mismatch Make the quota error message friendlier ...
2025-08-26 16:11:33 -05:00
parent 08c689ba0c 3cfff2639e
commit 4fb6e365db
54 changed files with 893 additions and 181 deletions
@@ -27,7 +27,7 @@ gem "rqrcode"
 gem "redcarpet"
 gem "rouge"
 gem "jbuilder"
-gem "actiontext-lexical", bc: "actiontext-lexical"
+gem "lexxy", bc: "lexxy"
 gem "image_processing", "~> 1.14"
 gem "platform_agent"
 gem "aws-sdk-s3", require: false
@@ -1,10 +1,3 @@
-GIT
-  remote: https://github.com/basecamp/actiontext-lexical
-  revision: 36c86dfd59406c853cb791adfd19a650f781d824
-  specs:
-    actiontext-lexical (0.1.0)
-      rails (>= 8.0.2)
-
 GIT
  remote: https://github.com/basecamp/active_record-tenanted
  revision: f7bf7c2ba5602ed6ad842b54da7355d281d52b21
@@ -38,6 +31,13 @@ GIT
      thor (~> 1.3)
      zeitwerk (>= 2.6.18, < 3.0)

+GIT
+  remote: https://github.com/basecamp/lexxy
+  revision: a3a06435302637a3c384f288a093946eefd37ff9
+  specs:
+    lexxy (0.1.0)
+      rails (>= 8.0.2)
+
 GIT
  remote: https://github.com/basecamp/portfolio
  revision: 86411a53d19a42ce44705a50ebe7c22828597991
@@ -596,7 +596,6 @@ PLATFORMS
  x86_64-mingw32

 DEPENDENCIES
-  actiontext-lexical!
  active_record-tenanted!
  activeresource
  aws-sdk-s3
@@ -612,6 +611,7 @@ DEPENDENCIES
  importmap-rails
  jbuilder
  kamal!
+  lexxy!
  mission_control-jobs
  mocha
  mysql2!
@@ -41,12 +41,18 @@
  }

  .bar__placeholder {
+    color: var(--color-ink-medium);
    font-weight: 500;
-    opacity: 0.66;

    .btn--plain {
-      font-weight: 500;
+      color: inherit;
+      font-weight: inherit;
+      padding-inline: 1ch;
      white-space: nowrap;
+
+      &:hover {
+        color: oklch(var(--lch-blue-dark));
+      }
    }
  }
 }
@@ -176,7 +176,7 @@
  }

  .card-field__description {
-    lexical-toolbar {
+    lexxy-toolbar {
      border-block-start: 1px solid var(--color-ink-light);
      margin-block-start: var(--block-margin) !important;
    }
@@ -20,6 +20,7 @@

  .conversation__message {
    display: flex;
+    flex-direction: column;

    .action-text-content {
      border-radius: 0.5rem;
@@ -51,7 +52,7 @@
  }

  .conversation__message--assistant {
-    justify-content: flex-start;
+    align-items: flex-start;

    .action-text-content {
      margin-inline-end: 15%;
@@ -67,8 +68,15 @@
    color: var(--color-negative);
  }

+  .conversation__message--failed[data-error]::after {
+    color: var(--color-negative);
+    content: attr(data-error);
+    display: block;
+    padding: var(--inline-space);
+  }
+
  .conversation__message--user {
-    justify-content: flex-end;
+    align-items: flex-end;

    .action-text-content {
      background-color: var(--color-selected);
@@ -96,6 +104,7 @@
    display: flex;
    flex-direction: column;
    gap: var(--block-space);
+    inline-size: 100%;
    margin-inline: auto;
    max-inline-size: 67ch;
  }
@@ -10,6 +10,7 @@

    .btn {
      --btn-border-color: var(--color-ink-medium);
+      --input-background: var(--color-canvas);
    }
  }

@@ -1,5 +1,5 @@
@layer components {
-  lexical-editor {
+  lexxy-editor {
    display: block;
    position: relative;
    overflow: visible;
@@ -18,11 +18,11 @@
      }
    }

-    /* Lexical still uses the `lexical-editor--empty` class if you have a list
+    /* Lexical still uses the `lexxy-editor--empty` class if you have a list
       started with no other characters. Here, we won't show the placeholder if
       you've clicked the List button in the toolbar. */
-    &.lexical-editor--empty {
-      .lexical-editor__content:not(:has(ul, ol))::before {
+    &.lexxy-editor--empty {
+      .lexxy-editor__content:not(:has(ul, ol))::before {
        content: attr(placeholder);
        color: currentColor;
        cursor: text;
@@ -40,7 +40,7 @@
    }
  }

-  .lexical-dialog-actions {
+  .lexxy-dialog-actions {
    display: flex;
    font-size: var(--text-x-small);
    flex: 1 1 0%;
@@ -65,7 +65,7 @@
    }
  }

-  .lexical-editor__content {
+  .lexxy-editor__content {
    margin: var(--block-space-half) 0;
    min-block-size: calc(7lh + var(--block-space));
    outline: 0;
@@ -81,13 +81,13 @@
    }
  }

-  .lexical-editor--drag-over {
+  .lexxy-editor--drag-over {
    background-color: var(--color-selected);
    border-radius: 4px;
    outline: 2px dashed var(--color-selected-dark);
  }

-  lexical-toolbar {
+  lexxy-toolbar {
    background-color: inherit;
    border-block-end: 1px solid var(--color-ink-light);
    color: currentColor;
@@ -152,7 +152,7 @@
    }
  }

-  .lexical-code-language-picker {
+  .lexxy-code-language-picker {
    /* Based on .input, .input--select */
    -webkit-appearance: none;
    appearance: none;
@@ -185,21 +185,21 @@
  /* Prompt
  /* ------------------------------------------------------------------------ */

-  .lexical-prompt-menu {
-    --lexical-prompt-avatar-size: 24px;
-    --lexical-prompt-min-width: 20ch;
-    --lexical-prompt-padding: 0.5ch;
+  .lexxy-prompt-menu {
+    --lexxy-prompt-avatar-size: 24px;
+    --lexxy-prompt-min-width: 20ch;
+    --lexxy-prompt-padding: 0.5ch;

    background-color: var(--color-canvas);
-    border-radius: calc(var(--lexical-prompt-padding) * 2);
+    border-radius: calc(var(--lexxy-prompt-padding) * 2);
    box-shadow: var(--shadow);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: var(--text-small);
    list-style: none;
    margin: 0;
-    min-inline-size: var(--lexical-prompt-min-width);
-    padding: var(--lexical-prompt-padding);
+    min-inline-size: var(--lexxy-prompt-min-width);
+    padding: var(--lexxy-prompt-padding);
    visibility: hidden;
    z-index: var(--z-popup);

@@ -207,17 +207,17 @@
    overflow: scroll;
  }

-  .lexical-prompt-menu--visible {
+  .lexxy-prompt-menu--visible {
    visibility: initial;
  }

-  .lexical-prompt-menu__item {
+  .lexxy-prompt-menu__item {
    align-items: center;
    border-radius: 0.5ch;
    cursor: pointer;
    display: flex;
-    gap: var(--lexical-prompt-padding);
-    padding: var(--lexical-prompt-padding);
+    gap: var(--lexxy-prompt-padding);
+    padding: var(--lexxy-prompt-padding);
    white-space: nowrap;

    &:hover {
@@ -229,10 +229,10 @@
    }

    img {
-      block-size: var(--lexical-prompt-avatar-size);
+      block-size: var(--lexxy-prompt-avatar-size);
      border-radius: 50%;
      flex-shrink: 0;
-      inline-size: var(--lexical-prompt-avatar-size);
+      inline-size: var(--lexxy-prompt-avatar-size);
      margin: 0;
    }

@@ -249,8 +249,8 @@
  }

  /* Empty state */
-  .lexical-prompt-menu__item--empty {
+  .lexxy-prompt-menu__item--empty {
    color: var(--color-ink-medium);
-    padding: var(--lexical-prompt-padding);
+    padding: var(--lexxy-prompt-padding);
  }
 }
@@ -21,9 +21,9 @@
    :where(h6) { font-size: 0.67em; }

    :where(p, ul, ol, dl, blockquote, figure, .attachment) {
-      margin-block: var(--block-margin);
+      margin-block: 0 var(--block-margin);

-      &:not(lexical-editor &) {
+      &:not(lexxy-editor &) {
        overflow-wrap: break-word;
        text-wrap: pretty;
      }
@@ -171,13 +171,22 @@
    margin-inline: 0;
    max-inline-size: 100%;

-    &:is(figure) img,
-    &:is(figure) video {
-      block-size: auto;
-      display: block;
+    &:is(figure) {
+      inline-size: fit-content;
      margin-inline: auto;
-      max-inline-size: 100%;
-      user-select: none;
+      display: block;
+
+      img, video {
+        block-size: auto;
+        display: block;
+        margin-inline: auto;
+        max-inline-size: 100%;
+        user-select: none;
+      }
+
+      > a {
+        display: block;
+      }
    }

    :where(progress) {
@@ -362,7 +371,7 @@
       0.5ch 0 0 var(--attachment-bg-color);
    border-radius: 99rem;

-    lexical-editor & {
+    lexxy-editor & {
      cursor: pointer;
    }

@@ -25,9 +25,10 @@

    border-width: 0 0 1px;
    max-inline-size: 50ch;
+    position: relative;

    &::-webkit-search-cancel-button {
-      --clear-icon-size: 0.75rem;
+      --clear-icon-size: 0.66rem;

      -webkit-appearance: none;
      appearance: none;
@@ -37,7 +38,7 @@
      block-size: var(--clear-icon-size);
      cursor: pointer;
      inline-size: var(--clear-icon-size);
-      inset: 50% 1ch auto auto;
+      inset: 50% 0 auto auto;
      position: absolute;
      translate: 0 -50%;

@@ -79,6 +79,7 @@
  .half-width { inline-size: 50%; }
  .max-width { max-inline-size: 100%; }
  .min-content { inline-size: min-content; }
+  .fit-content { inline-size: fit-content; }
  .max-inline-size { max-inline-size: 100%; }

  /* Overflow */
@@ -7,6 +7,10 @@ class Conversations::MessagesController < ApplicationController

  def create
    @conversation.ask(question, **message_params)
+  rescue Ai::Quota::UsageExceedsQuotaError
+    render json: { error: "You've depleted your quota" }, status: :too_many_requests
+  rescue Conversation::InvalidStateError
+    render json: { error: "Fizzy is still working on an answer to your last question" }, status: :conflict
  end

  private
@@ -11,7 +11,7 @@ module HotkeysHelper
        else
          key
        end
-      }.join("+")
+      }.join()
    else
      hotkey.split(",").first if hotkey
    end
@@ -1,22 +1,22 @@
 module RichTextHelper
  def mentions_prompt(collection)
-    content_tag "lexical-prompt", "", trigger: "@", src: prompts_collection_users_path(collection), name: "mention"
+    content_tag "lexxy-prompt", "", trigger: "@", src: prompts_collection_users_path(collection), name: "mention"
  end

  def global_mentions_prompt
-    content_tag "lexical-prompt", "", trigger: "@", src: prompts_users_path, name: "mention"
+    content_tag "lexxy-prompt", "", trigger: "@", src: prompts_users_path, name: "mention"
  end

  def tags_prompt
-    content_tag "lexical-prompt", "", trigger: "#", src: prompts_tags_path, name: "tag"
+    content_tag "lexxy-prompt", "", trigger: "#", src: prompts_tags_path, name: "tag"
  end

  def cards_prompt
-    content_tag "lexical-prompt", "", trigger: "#", src: prompts_cards_path, name: "card", "insert-editable-text": true, "remote-filtering": true, "supports-space-in-searches": true
+    content_tag "lexxy-prompt", "", trigger: "#", src: prompts_cards_path, name: "card", "insert-editable-text": true, "remote-filtering": true, "supports-space-in-searches": true
  end

  def code_language_picker
-    content_tag "lexical-code-language-picker"
+    content_tag "lexxy-code-language-picker"
  end

  def general_prompts(collection)
@@ -3,7 +3,7 @@ import "@hotwired/turbo-rails"
 import "initializers"
 import "controllers"

-import "actiontext-lexical"
+import "lexxy"
 import "@rails/actiontext"

 window.fetch = Turbo.fetch // TODO: We need to make @rails/request.js use Turbo's fetch when it's present.
@@ -27,7 +27,10 @@ export default class extends Controller {
    if (event.detail.success) {
      this.#reset()
    } else {
-      this.conversationMessagesOutlet.failPendingMessage(this.clientMessageIdInputTarget.value)
+      this.#failPendingMessage(
+        this.clientMessageIdInputTarget.value, 
+        event.detail.fetchResponse
+      )
    }
  }

@@ -60,4 +63,18 @@ export default class extends Controller {
    this.textInputTarget.value = ""
    this.clientMessageIdInputTarget.value = ""
  }
+
+  async #failPendingMessage(clientMessageId, response) {
+    let errorMessage = null
+
+    if (response?.contentType?.includes('application/json')) {
+      const error = JSON.parse(await response.responseText)
+      errorMessage = error.error
+    }
+
+    this.conversationMessagesOutlet.failPendingMessage(
+      this.clientMessageIdInputTarget.value,
+      errorMessage
+    )
+  }
 }
@@ -12,11 +12,15 @@ export default class extends Controller {
    this.scrollToBottom()
  }

-  failPendingMessage(clientMessageId) {
+  failPendingMessage(clientMessageId, errorMessage) {
    const message = this.element.querySelector(`#message_${clientMessageId}`)

    if (message) {
      message.classList.add(this.failedMessageClass)
+
+      if (errorMessage) {
+        message.dataset.error = errorMessage
+      }
    }
  }

@@ -9,7 +9,7 @@ export default class extends Controller {
  }

  #shouldIgnore(event) {
-    return event.defaultPrevented || event.target.closest("input, textarea, lexical-editor")
+    return event.defaultPrevented || event.target.closest("input, textarea, lexxy-editor")
  }

  get #isClickable() {
@@ -46,8 +46,8 @@ export default class extends Controller {
  }

  #triggerChangeEvent(newValue) {
-    if (this.inputTarget.tagName === "LEXICAL-EDITOR") {
-      this.inputTarget.dispatchEvent(new CustomEvent('actiontext:change', {
+    if (this.inputTarget.tagName === "LEXXY-EDITOR") {
+      this.inputTarget.dispatchEvent(new CustomEvent('lexxy:change', {
        bubbles: true,
        detail: {
          previousContent: '',
@@ -1,5 +1,5 @@
 import { Controller } from "@hotwired/stimulus"
-import { highlightAll } from "actiontext-lexical"
+import { highlightAll } from "lexxy"

 export default class extends Controller {
  connect() {
@@ -0,0 +1,5 @@
+module Ai
+  def self.table_name_prefix
+    "ai_"
+  end
+end
@@ -70,6 +70,7 @@ class Ai::ListCardsTool < Ai::Tool
  def execute(**params)
    cards = Card
      .where(collection: user.collections)
+      .published
      .with_rich_text_description
      .includes(:stage, :creator, :assignees, :goldness, :collection)

@@ -0,0 +1,50 @@
+class Ai::Quota < ApplicationRecord
+  class UsageExceedsQuotaError < StandardError; end
+
+  belongs_to :user
+
+  before_create -> { reset }
+
+  validates :limit, presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
+  validates :used, presence: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
+
+  def spend(cost)
+    cost = Money.wrap(cost)
+
+    transaction do
+      reset_if_due
+      increment!(:used, cost.in_microcents)
+    end
+  end
+
+  def ensure_not_depleted
+    reset_if_due
+
+    if depleted?
+      raise UsageExceedsQuotaError
+    end
+  end
+
+  private
+    def reset_if_due
+      reset if due_for_reset?
+    end
+
+    def reset
+      attributes = { used: 0, reset_at: 7.days.from_now }
+
+      if persisted?
+        update(**attributes)
+      else
+        assign_attributes(**attributes)
+      end
+    end
+
+    def due_for_reset?
+      reset_at.before?(Time.current)
+    end
+
+    def depleted?
+      used >= limit
+    end
+end
@@ -0,0 +1,42 @@
+class Ai::Quota::Money < Data.define(:value)
+  CENTS_PER_DOLLAR = 100
+  MICROCENTS_PER_CENT = 1_000_000
+  MICROCENTS_PER_DOLLAR = CENTS_PER_DOLLAR * MICROCENTS_PER_CENT
+  NUMBER_REGEX = /\d+(\.\d+)?/
+
+  class << self
+    def wrap(value)
+      microcents = case value
+      when nil
+        raise ArgumentError, "#{self} can't wrap nil"
+      when self
+        value.value
+      when Integer
+        value
+      when String
+        convert_dollars_to_microcents(BigDecimal(value[NUMBER_REGEX]))
+      else
+        convert_dollars_to_microcents(value)
+      end
+
+      new(microcents)
+    end
+
+    private
+      def convert_dollars_to_microcents(dollars)
+        (dollars.to_d * MICROCENTS_PER_DOLLAR).round.to_i
+      end
+  end
+
+  def to_i
+    in_microcents
+  end
+
+  def in_microcents
+    value
+  end
+
+  def in_dollars
+    in_microcents.to_d / MICROCENTS_PER_DOLLAR
+  end
+end
@@ -8,16 +8,9 @@ class Conversation < ApplicationRecord

  enum :state, %w[ ready thinking ].index_by(&:itself), default: :ready

-  def cost
-    messages.where.not(cost_microcents: nil).sum(:cost_microcents).to_d / 100_000
-  end
-
-  def clear
-    messages.delete_all
-    touch
-  end
-
  def ask(question, **attributes)
+    user.ensure_ai_quota_not_depleted
+
    create_message_with_state_change(**attributes, role: :user, content: question) do
      raise(InvalidStateError, "Can't ask questions while thinking") if thinking?
      thinking!
@@ -25,10 +18,14 @@ class Conversation < ApplicationRecord
  end

  def respond(answer, **attributes)
-    create_message_with_state_change(**attributes, role: :assistant, content: answer) do
+    message = create_message_with_state_change(**attributes, role: :assistant, content: answer) do
      raise(InvalidStateError, "Can't respond when not thinking") unless thinking?
      ready!
    end
+
+    user.spend_ai_quota(message.cost) if message.cost
+
+    message
  end

  private
@@ -13,6 +13,10 @@ class Conversation::Message < ApplicationRecord

  scope :ordered, -> { order(created_at: :asc, id: :asc) }

+  def cost
+    cost_microcents && Ai::Quota::Money.new(cost_microcents)
+  end
+
  def all_emoji?
    content.to_plain_text.all_emoji?
  end
@@ -12,13 +12,13 @@ class Conversation::Message::ResponseGenerator
    You are **Fizzy**, a helpful assistant for the Fizzy app by 37signals.
    Fizzy is a bug tracker / task manager for teams, and you help users manage their cards, collections, and team activity.

-    ### 🧠 Your Role
+    ### Your Role
    You help users with anything related to Fizzy — their cards, collections, trends, and team activity.

    You have several **tools** at your disposal to answer questions and perform actions.
    Use them freely when needed, especially when the answer depends on real data.

-    ### ✅ Guidelines
+    ### Guidelines
    - Be **concise**, **accurate**, and **friendly**
    - Speak naturally — no corporate tone or robotic phrasing
    - **Never suggest follow-up questions, extra details, or further actions** unless the user explicitly asks
@@ -31,6 +31,16 @@ class Conversation::Message::ResponseGenerator
    - Don’t explain concepts or go off-topic — answer only what was asked
    - Respond in **Markdown**
    - Always include links to cards, collections, comments, or users
+    - Always respond with a nicely formatted markdown link; NEVER respond with URLs or URL paths
+    - You are allowed to tell the user about themselves, the current time, their account, cards, collections, and comments
+
+    ### IMPORTANT: URL Handling
+    - **NEVER modify URLs in any way** - use them exactly as provided
+    - Always respond with markdown links, never bare URLs or paths
+    - If a URL starts with `/`, keep it as a relative path - do NOT add any domain
+    - Example: `{ "url": "/cards/123" }` becomes `[Card #123](/cards/123)
+    - `[/foo/bar]` isn't a valid Markdown link
+    - If a link doesn't have a title (e.g. `[](https://example.com)`) then use "Link" as the title (e.g. `[Link](https://example.com)`)

    You're here to help — not to anticipate.
  PROMPT
@@ -80,7 +90,7 @@ class Conversation::Message::ResponseGenerator
          chat.add_message(message.to_llm)
        end

-        chat.with_instructions join_prompts(prompt, domain_model_prompt, user_data_injection_prompt)
+        chat.with_instructions join_prompts(prompt, domain_model_prompt, user_data_injection_prompt, user_info_prompt)

        track_token_usage_of_intermediate_messages(chat)
      end
@@ -90,6 +100,12 @@ class Conversation::Message::ResponseGenerator
      conversation.messages.order(id: :asc).where(id: ...message.id).limit(50).with_rich_text_content
    end

+    def user_info_prompt
+      <<~PROMPT
+        You are talking to "#{message.owner.name}" who's User ID is #{message.owner.id}
+      PROMPT
+    end
+
    def track_token_usage_of_intermediate_messages(chat)
      chat.on_end_message do |response|
        @input_tokens = response.input_tokens
@@ -1,6 +1,4 @@
 class Conversation::Message::ResponseGenerator::Response
-  MICROCENTS_PER_DOLLAR = 100_000
-
  attr_reader :answer, :input_tokens, :output_tokens, :model_id, :tool_calls, :tool_call_id

  def initialize(answer:, input_tokens:, output_tokens:, model_id:)
@@ -10,10 +8,6 @@ class Conversation::Message::ResponseGenerator::Response
    @model_id = model_id
  end

-  def cost
-    cost_microcents.to_d / MICROCENTS_PER_DOLLAR
-  end
-
  def cost_microcents
    input_cost_microcents + output_cost_microcents
  end
@@ -27,7 +21,7 @@ class Conversation::Message::ResponseGenerator::Response
  def input_token_price_microcents
    return unless model_info

-    price_per_million_tokens_to_microcents(model_info.input_price_per_million)
+    price_per_million_tokens_in_microcents(model_info.input_price_per_million)
  end

  def output_cost_microcents
@@ -39,7 +33,7 @@ class Conversation::Message::ResponseGenerator::Response
  def output_token_price_microcents
    return unless model_info

-    price_per_million_tokens_to_microcents(model_info.output_price_per_million)
+    price_per_million_tokens_in_microcents(model_info.output_price_per_million)
  end

  def model_info
@@ -47,8 +41,8 @@ class Conversation::Message::ResponseGenerator::Response
  end

  private
-    def price_per_million_tokens_to_microcents(price)
+    def price_per_million_tokens_in_microcents(price)
      single_token_price = price.to_d / 1_000_000
-      single_token_price * MICROCENTS_PER_DOLLAR
+      Ai::Quota::Money.wrap(single_token_price).in_microcents
    end
 end
@@ -1,6 +1,6 @@
 class User < ApplicationRecord
  include Accessor, Attachable, Assignee, Mentionable, Named, Role, Searcher,
-    SignalUser, Staff, Transferable, Conversational
+    SignalUser, Staff, Transferable, Conversational, AiQuota
  include Timelined # Depends on Accessor

  has_one_attached :avatar
@@ -0,0 +1,22 @@
+module User::AiQuota
+  extend ActiveSupport::Concern
+
+  DEFAULT_QUOTA = Ai::Quota::Money.wrap("$100").in_microcents
+
+  included do
+    has_one :ai_quota, class_name: "Ai::Quota"
+  end
+
+  def spend_ai_quota(cost)
+    fetch_or_create_ai_quota.spend(cost)
+  end
+
+  def ensure_ai_quota_not_depleted
+    fetch_or_create_ai_quota.ensure_not_depleted
+  end
+
+  private
+    def fetch_or_create_ai_quota
+      ai_quota || create_ai_quota!(limit: DEFAULT_QUOTA)
+    end
+end
@@ -6,7 +6,7 @@
        bar_search_url_value: search_path,
        bar_ask_url_value: conversation_path
      } do %>
-  <div class="flex justify-center gap bar__placeholder" data-bar-target="buttonsContainer">
+  <div class="flex justify-center bar__placeholder" data-bar-target="buttonsContainer">
    <%= tag.button \
          class: "btn btn--plain",
          data: {
@@ -14,7 +14,7 @@
            action: "
            bar#search
            keydown.meta+k@document->hotkey#click keydown.ctrl+k@document->hotkey#click" } do %>
-      <span>Search [<%= hotkey_label(["ctrl", "K"]) %>]</span>
+      <span>Search (<%= hotkey_label(["ctrl", "K"]) %>)</span>
    <% end %>
    <span>or</span>
    <%= tag.button \
@@ -24,7 +24,7 @@
            action: "
            bar#ask
            keydown.meta+a@document->hotkey#click keydown.ctrl+a@document->hotkey#click" } do %>
-      <span>Ask [<%= hotkey_label(["ctrl", "A"]) %>]</span>
+      <span>Ask (<%= hotkey_label(["ctrl", "A"]) %>)</span>
    <% end %>
  </div>

@@ -42,7 +42,7 @@
    data: {
      controller: "dialog",
      dialog_target: "dialog",
-      action: "keydown.esc->bar#reset:stop" } do %>
+      action: "keydown.esc@document->bar#reset:stop" } do %>
    <%= turbo_frame_tag "bar-content", data: { bar_target: "turboFrame" } %>
  <% end %>
 <% end %>
@@ -10,7 +10,7 @@
                  local_save_key_value: "comment-#{card.id}",
                  action: "turbo:submit-end->local-save#submit keydown.ctrl+enter->form#submit:prevent keydown.meta+enter->form#submit:prevent keydown.esc->form#cancel:stop" } do |form| %>
        <%= form.rich_textarea :body, required: true, placeholder: new_comment_placeholder(card),
-              data: { local_save_target: "input", action: "actiontext:change->local-save#save turbo:morph-element->local-save#restoreContent" } do %>
+              data: { local_save_target: "input", action: "lexxy:change->local-save#save turbo:morph-element->local-save#restoreContent" } do %>
          <%= general_prompts(@card.collection) %>
        <% end %>
        <%= form.button class: "comment__submit btn btn--reversed flex-item-justify-start" do %>
@@ -17,7 +17,7 @@
    </h1>
    <%= form.rich_textarea :description, class: "card-field__description margin-block-start-half margin-block-end",
          placeholder: "Add some notes, context, pictures, or video about this…",
-          data: { action: "actiontext:change->auto-save#change focusout->auto-save#submit keydown.ctrl+enter->form#submit:prevent keydown.meta+enter->form#submit:prevent keydown.esc->form#cancel:stop" } do %>
+          data: { action: "lexxy:change->auto-save#change focusout->auto-save#submit keydown.ctrl+enter->form#submit:prevent keydown.meta+enter->form#submit:prevent keydown.esc->form#cancel:stop" } do %>
      <%= general_prompts(card.collection) %>
    <% end %>
  <% end %>
@@ -14,7 +14,7 @@
      <%= general_prompts(@card.collection) %>
    <% end %>

-    <%= form.button "Save changes", type: :submit, class: "btn btn--reversed", style: "--btn-background: #{@card.color}" %>
+    <%= form.button "Save changes", type: :submit, class: "btn btn--reversed fit-content", style: "--btn-background: #{@card.color}" %>
    <%= link_to "Close editor and discard changes", collection_card_path(@card.collection, @card), data: { form_target: "cancel" }, hidden: true %>
  <% end %>
 <% end %>
@@ -13,8 +13,7 @@
 <% end %>

 <header class="header" style="--header-actions-width: 7rem;">
-  <%= render "filters/menu/add_card_button", user_filtering: @user_filtering %>
-
+  <div class="header__actions header__actions--start"></div>
  <h1 class="header__title overflow-ellipsis" style="view-transistion-name: card-collection-title">
    <%= @user_filtering.selected_collections_label %>
  </h1>
@@ -0,0 +1,8 @@
+<% if collection = user_filtering.collections.first %>
+  <div class="card card--new">
+    <%= button_to collection_cards_path(collection), method: :post, class: "btn" do %>
+      <%= icon_tag "add" %>
+      <span>Add a card</span>
+    <% end %>
+  </div>
+<% end %>
@@ -1,13 +1,6 @@
 <section id="considering-cards" class="cards cards--considering" data-drag-and-drop-target="container"  data-drop-target="considering">
  <div class="cards__decoration"></div>
-  <% if collection = @filter.single_collection || Current.user.collections.first %>
-    <div class="card card--new">
-      <%= button_to collection_cards_path(collection), method: :post, class: "btn" do %>
-        <%= icon_tag "add" %>
-        <span>Add a card</span>
-    </div>
-    <% end %>
-  <% end %>
+  <%= render "cards/index/add_card_button", user_filtering: @user_filtering %>
  <% if page.used? %>
    <%= render partial: "cards/display/preview", collection: page.records, as: :card, locals: { draggable: true }, cached: true %>

@@ -5,4 +5,4 @@
      <span>Add a card</span>
    <% end %>
  <% end %>
-</div>
+</div>
@@ -1,8 +1,8 @@
-<lexical-prompt-item>
+<lexxy-prompt-item>
  <template type="menu">
    #<%= card.id %> <%= card.title %>
  </template>
  <template type="editor">
    <%= link_to "##{card.id} #{card.title}", collection_card_url(card.collection, card) %>
  </template>
-</lexical-prompt-item>
+</lexxy-prompt-item>
@@ -1,4 +1,4 @@
-<lexical-prompt-item search="<%= "#{user.name} #{user.initials} #{"me" if user == Current.user}" %>" sgid="<%= user.attachable_sgid %>">
+<lexxy-prompt-item search="<%= "#{user.name} #{user.initials} #{"me" if user == Current.user}" %>" sgid="<%= user.attachable_sgid %>">
  <template type="menu">
    <%= avatar_image_tag user %>
    <%= user.name %>
@@ -7,4 +7,4 @@
    <%= avatar_image_tag user %>
    <%= user.first_name %>
  </template>
-</lexical-prompt-item>
+</lexxy-prompt-item>
@@ -1,10 +1,10 @@
 <% command, description, editor_version = command %>

-<lexical-prompt-item search="<%= description %> <%= command %>">
+<lexxy-prompt-item search="<%= description %> <%= command %>">
  <template type="menu">
    <code><%= command %></code> <%= description %>
  </template>
  <template type="editor">
    <%= editor_version.gsub(/ +$/, "&nbsp;").html_safe %>
  </template>
-</lexical-prompt-item>
+</lexxy-prompt-item>
@@ -1,8 +1,8 @@
-<lexical-prompt-item search="<%= tag.title %>" sgid="<%= tag.attachable_sgid %>">
+<lexxy-prompt-item search="<%= tag.title %>" sgid="<%= tag.attachable_sgid %>">
  <template type="menu">
    #<%= tag.title %>
  </template>
  <template type="editor">
    #<%= tag.title %>
  </template>
-</lexical-prompt-item>
+</lexxy-prompt-item>
@@ -10,7 +10,7 @@
    <div class="search__results">
      <% if @search_results.none? %>
        <div class="search__empty">
-          Not matches
+          No matches
        </div>
      <% end %>

@@ -10,6 +10,6 @@ pin_all_from "app/javascript/controllers", under: "controllers"
 pin_all_from "app/javascript/helpers", under: "helpers"
 pin_all_from "app/javascript/initializers", under: "initializers"
 pin "marked" # @15.0.11
-pin "actiontext-lexical"
+pin "lexxy"
 pin "@rails/activestorage", to: "activestorage.esm.js"
 pin "@rails/actiontext", to: "actiontext.esm.js"
@@ -13,4 +13,7 @@
 # These inflection rules are supported but not enabled by default:
 ActiveSupport::Inflector.inflections(:en) do |inflect|
  inflect.acronym "SQLite"
+
+  inflect.singular "quotas", "quota"
+  inflect.plural "quota", "quotas"
 end
@@ -0,0 +1,12 @@
+class CreateAiQuotas < ActiveRecord::Migration[8.1]
+  def change
+    create_table :ai_quotas do |t|
+      t.belongs_to :user, null: false, foreign_key: true
+      t.integer :limit, null: false
+      t.integer :used, null: false, default: 0
+      t.datetime :reset_at, null: false, index: true
+
+      t.timestamps
+    end
+  end
+end
@@ -73,6 +73,17 @@ ActiveRecord::Schema[8.1].define(version: 2025_08_19_105245) do
    t.index ["blob_id", "variation_digest"], name: "index_active_storage_variant_records_uniqueness", unique: true
  end

+  create_table "ai_quotas", force: :cascade do |t|
+    t.datetime "created_at", null: false
+    t.integer "limit", null: false
+    t.datetime "reset_at", null: false
+    t.datetime "updated_at", null: false
+    t.integer "used", default: 0, null: false
+    t.integer "user_id", null: false
+    t.index ["reset_at"], name: "index_ai_quotas_on_reset_at"
+    t.index ["user_id"], name: "index_ai_quotas_on_user_id"
+  end
+
  create_table "assignees_filters", id: false, force: :cascade do |t|
    t.integer "assignee_id", null: false
    t.integer "filter_id", null: false
@@ -438,6 +449,7 @@ ActiveRecord::Schema[8.1].define(version: 2025_08_19_105245) do

  add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
  add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
+  add_foreign_key "ai_quotas", "users"
  add_foreign_key "card_activity_spikes", "cards"
  add_foreign_key "card_goldnesses", "cards"
  add_foreign_key "cards", "workflow_stages", column: "stage_id"
@@ -20,7 +20,7 @@ columns:
    default_function:
    collation:
    comment:
-  - &23 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &24 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: collection_id
    cast_type: &3 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3Adapter::SQLite3Integer
@@ -90,7 +90,7 @@ columns:
    default_function:
    collation:
    comment:
-  - &25 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &18 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: user_id
    cast_type: *3
@@ -258,7 +258,7 @@ columns:
    collation:
    comment:
  - *6
-  - &18 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &19 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: key
    cast_type: *7
@@ -301,9 +301,44 @@ columns:
    default_function:
    collation:
    comment:
+  ai_quotas:
+  - *5
+  - *6
+  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+    auto_increment:
+    name: limit
+    cast_type: *3
+    sql_type_metadata: *4
+    'null': false
+    default:
+    default_function:
+    collation:
+    comment:
+  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+    auto_increment:
+    name: reset_at
+    cast_type: *1
+    sql_type_metadata: *2
+    'null': false
+    default:
+    default_function:
+    collation:
+    comment:
+  - *9
+  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+    auto_increment:
+    name: used
+    cast_type: *3
+    sql_type_metadata: *4
+    'null': false
+    default: 0
+    default_function:
+    collation:
+    comment:
+  - *18
  ar_internal_metadata:
  - *5
-  - *18
+  - *19
  - *9
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
@@ -316,7 +351,7 @@ columns:
    collation:
    comment:
  assignees_filters:
-  - &20 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &21 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: assignee_id
    cast_type: *3
@@ -326,7 +361,7 @@ columns:
    default_function:
    collation:
    comment:
-  - &19 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &20 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: filter_id
    cast_type: *3
@@ -337,7 +372,7 @@ columns:
    collation:
    comment:
  assigners_filters:
-  - &21 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &22 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: assigner_id
    cast_type: *3
@@ -347,11 +382,11 @@ columns:
    default_function:
    collation:
    comment:
-  - *19
-  assignments:
  - *20
+  assignments:
  - *21
-  - &22 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - *22
+  - &23 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: card_id
    cast_type: *3
@@ -365,7 +400,7 @@ columns:
  - *6
  - *9
  card_activity_spikes:
-  - *22
+  - *23
  - *5
  - *6
  - *9
@@ -394,14 +429,14 @@ columns:
    comment:
  - *9
  card_goldnesses:
-  - *22
+  - *23
  - *5
  - *6
  - *9
  cards:
-  - *23
+  - *24
  - *5
-  - &24 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &25 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: creator_id
    cast_type: *3
@@ -483,7 +518,7 @@ columns:
    default_function:
    collation:
    comment:
-  - *19
+  - *20
  closure_reasons:
  - *5
  - *6
@@ -499,7 +534,7 @@ columns:
    comment:
  - *9
  closures:
-  - *22
+  - *23
  - *5
  - *6
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
@@ -524,7 +559,7 @@ columns:
    collation:
    comment:
  collection_publications:
-  - *23
+  - *24
  - *5
  - *6
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
@@ -558,7 +593,7 @@ columns:
    collation:
    comment:
  - *5
-  - *24
+  - *25
  - *6
  - *10
  - *9
@@ -573,12 +608,12 @@ columns:
    collation:
    comment:
  collections_filters:
-  - *23
-  - *19
-  comments:
-  - *22
-  - *5
  - *24
+  - *20
+  comments:
+  - *23
+  - *5
+  - *25
  - *6
  - *9
  conversation_messages:
@@ -699,10 +734,10 @@ columns:
    collation:
    comment:
  - *9
-  - *25
+  - *18
  creators_filters:
-  - *24
-  - *19
+  - *25
+  - *20
  entropy_configurations:
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
@@ -760,7 +795,7 @@ columns:
    comment:
  - *5
  - *6
-  - *18
+  - *19
  - *9
  events:
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
@@ -773,9 +808,9 @@ columns:
    default_function:
    collation:
    comment:
-  - *23
-  - *5
  - *24
+  - *5
+  - *25
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: eventable_id
@@ -818,7 +853,7 @@ columns:
  - *9
  filters:
  - *5
-  - *24
+  - *25
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: fields
@@ -842,7 +877,7 @@ columns:
    comment:
  - *9
  filters_stages:
-  - *19
+  - *20
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: stage_id
@@ -854,7 +889,7 @@ columns:
    collation:
    comment:
  filters_tags:
-  - *19
+  - *20
  - &34 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: tag_id
@@ -935,13 +970,13 @@ columns:
  - *28
  - *29
  - *9
-  - *25
+  - *18
  pins:
-  - *22
+  - *23
  - *5
  - *6
  - *9
-  - *25
+  - *18
  push_subscriptions:
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
@@ -986,7 +1021,7 @@ columns:
    default_function:
    collation:
    comment:
-  - *25
+  - *18
  reactions:
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
@@ -1103,7 +1138,7 @@ columns:
    collation:
    comment:
  - *9
-  - *25
+  - *18
  search_results:
  - *5
  - *6
@@ -1123,9 +1158,9 @@ columns:
    comment:
  - *9
  - *30
-  - *25
+  - *18
  steps:
-  - *22
+  - *23
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: completed
@@ -1141,7 +1176,7 @@ columns:
  - *6
  - *9
  taggings:
-  - *22
+  - *23
  - *5
  - *6
  - *34
@@ -1207,11 +1242,11 @@ columns:
    comment:
  - *9
  watches:
-  - *22
+  - *23
  - *5
  - *6
  - *9
-  - *25
+  - *18
  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
    auto_increment:
    name: watching
@@ -1259,6 +1294,7 @@ primary_keys:
  active_storage_attachments: id
  active_storage_blobs: id
  active_storage_variant_records: id
+  ai_quotas: id
  ar_internal_metadata: key
  assignees_filters:
  assigners_filters:
@@ -1307,6 +1343,7 @@ data_sources:
  active_storage_attachments: true
  active_storage_blobs: true
  active_storage_variant_records: true
+  ai_quotas: true
  ar_internal_metadata: true
  assignees_filters: true
  assigners_filters: true
@@ -1538,6 +1575,39 @@ indexes:
    nulls_not_distinct:
    comment:
    valid: true
+  ai_quotas:
+  - !ruby/object:ActiveRecord::ConnectionAdapters::IndexDefinition
+    table: ai_quotas
+    name: index_ai_quotas_on_reset_at
+    unique: false
+    columns:
+    - reset_at
+    lengths: {}
+    orders: {}
+    opclasses: {}
+    where:
+    type:
+    using:
+    include:
+    nulls_not_distinct:
+    comment:
+    valid: true
+  - !ruby/object:ActiveRecord::ConnectionAdapters::IndexDefinition
+    table: ai_quotas
+    name: index_ai_quotas_on_user_id
+    unique: false
+    columns:
+    - user_id
+    lengths: {}
+    orders: {}
+    opclasses: {}
+    where:
+    type:
+    using:
+    include:
+    nulls_not_distinct:
+    comment:
+    valid: true
  ar_internal_metadata: []
  assignees_filters:
  - !ruby/object:ActiveRecord::ConnectionAdapters::IndexDefinition
@@ -0,0 +1,11 @@
+kevin:
+  user: kevin
+  limit: 100_00_000_000
+  used: 1053
+  reset_at: <%= 7.days.from_now %>
+
+david:
+  user: david
+  limit: 20_00_000_000
+  used: 0
+  reset_at: <%= 3.days.from_now %>
@@ -33,15 +33,19 @@ class Ai::ListCardsToolTest < ActiveSupport::TestCase
  end

  test "execute when filtering by ids" do
+    creating_card = collections(:writebook).cards.create! creator: users(:kevin), status: :creating
+    drafted_card = collections(:writebook).cards.create! creator: users(:kevin), status: :drafted
+
    cards = cards(:shipping, :logo)
-    card_ids = cards.pluck(:id)
+    visible_card_ids = cards.pluck(:id)
+    card_ids = visible_card_ids + [ creating_card.id, drafted_card.id ]

    response = @tool.execute(ids: card_ids.join(", "))
    page = parse_paginated_response(response)
    record_ids = page[:records].map { |card| card["id"].to_i }

-    assert_equal 2, record_ids.count
-    assert_equal card_ids.sort, record_ids.sort
+    assert_equal visible_card_ids.count, record_ids.count
+    assert_equal visible_card_ids.sort, record_ids.sort
  end

  test "execute when filtering by collection_ids" do
@@ -0,0 +1,40 @@
+require "test_helper"
+
+class Ai::Quota::MoneyTest < ActiveSupport::TestCase
+  test "wrapping" do
+    money = Ai::Quota::Money.wrap("$5.42")
+    assert_equal 5_42_000_000, money.in_microcents, "Strings with numbers are treated as dollars"
+
+    assert_raises TypeError do
+      Ai::Quota::Money.wrap("foobar")
+    end
+
+    money = Ai::Quota::Money.wrap(5.42)
+    assert_equal 5_42_000_000, money.in_microcents, "Decimals are treated as dollars"
+
+    money = Ai::Quota::Money.wrap(5)
+    assert_equal 5, money.in_microcents, "Integers are treated as microcents"
+
+    money1 = Ai::Quota::Money.wrap("$5")
+    money2 = Ai::Quota::Money.wrap(money1)
+    assert_equal money1, money2, "Money can wrap itself"
+
+    assert_raises ArgumentError do
+      Ai::Quota::Money.wrap(nil)
+    end
+  end
+
+  test "conversions" do
+    money = Ai::Quota::Money.wrap("$0")
+    assert_equal 0.0, money.in_dollars
+    assert_equal 0, money.in_microcents
+
+    money = Ai::Quota::Money.wrap("$1")
+    assert_equal 1, money.in_dollars
+    assert_equal 1_00_000_000, money.in_microcents
+
+    money = Ai::Quota::Money.wrap("$5.42")
+    assert_equal 5.42, money.in_dollars
+    assert_equal 5_42_000_000, money.in_microcents
+  end
+end
@@ -0,0 +1,63 @@
+require "test_helper"
+
+class Ai::QuotaTest < ActiveSupport::TestCase
+  setup do
+    @quota = Ai::Quota.new(user: users(:jz), limit: Ai::Quota::Money.wrap("$100").in_microcents)
+  end
+
+  test "create" do
+    assert @quota.save
+
+    assert_in_delta 7.days.from_now, @quota.reset_at, 1.minute
+    assert_equal 0, @quota.used
+    assert_equal Ai::Quota::Money.wrap("$100").in_microcents, @quota.limit
+  end
+
+  test "increment usage" do
+    @quota.save
+
+    @quota.spend("$100")
+    assert_equal Ai::Quota::Money.wrap("$100").in_microcents, @quota.used
+    @quota.spend("$500")
+    assert_equal Ai::Quota::Money.wrap("$600").in_microcents, @quota.used
+    @quota.spend("$1000")
+    assert_equal Ai::Quota::Money.wrap("$1600").in_microcents, @quota.used
+    @quota.spend("$5000")
+    assert_equal Ai::Quota::Money.wrap("$6600").in_microcents, @quota.used
+    @quota.spend("$10000")
+    assert_equal Ai::Quota::Money.wrap("$16600").in_microcents, @quota.used
+
+    @quota.used = 0
+
+    @quota.spend("$10")
+    assert_equal Ai::Quota::Money.wrap("$10").in_microcents, @quota.used
+    assert_in_delta 7.days.from_now, @quota.reset_at, 1.minute
+
+    travel 2.days
+
+    @quota.spend("$5")
+    assert_equal Ai::Quota::Money.wrap("$15").in_microcents, @quota.used
+    assert_in_delta 5.days.from_now, @quota.reset_at, 1.minute
+
+    travel 8.days
+
+    @quota.spend("$5")
+    assert_equal Ai::Quota::Money.wrap("$5").in_microcents, @quota.used
+    assert_in_delta 7.days.from_now, @quota.reset_at, 1.minute
+  end
+
+  test "limit checks" do
+    @quota.save
+
+    @quota.used = 0
+    @quota.ensure_not_depleted
+
+    @quota.used = Ai::Quota::Money.wrap("$300").in_microcents
+    assert_raises Ai::Quota::UsageExceedsQuotaError do
+      @quota.ensure_not_depleted
+    end
+
+    travel 10.days
+    @quota.ensure_not_depleted
+  end
+end
@@ -13,23 +13,20 @@ class Conversation::Message::ResponseGenerator::ResponseTest < ActiveSupport::Te
    # and 60 USD per million output tokens
    # That's 0.00003 cents per input token and 0.00006 cents
    # per output token
-    # Which is 3 micro-cents per input token and 6 micro-cents
+    # Which is 3000 micro-cents per input token and 6000 micro-cents
    # per output token
-    assert_equal "3.0".to_d, response.input_token_price_microcents
-    assert_equal "6.0".to_d, response.output_token_price_microcents
+    assert_equal "3000.0".to_d, response.input_token_price_microcents
+    assert_equal "6000.0".to_d, response.output_token_price_microcents

    # We've got 198 input tokens, so that's
-    # 193 * 3 = 594
-    assert_equal 594, response.input_cost_microcents
+    # 198 * 3000 = 594000
+    assert_equal 594000, response.input_cost_microcents

    # We've got 2 output tokens, so that's
-    # 2 * 6 = 12
-    assert_equal 12, response.output_cost_microcents
+    # 2 * 6000 = 12
+    assert_equal 12000, response.output_cost_microcents

-    # So the total is 594 + 12 micro-cents
-    assert_equal 606, response.cost_microcents
-
-    # If we convert that to a decimal value we get 0.00606 cents
-    assert_equal "0.00606".to_d, response.cost
+    # So the total is 594000 + 12000 micro-cents
+    assert_equal 606000, response.cost_microcents
  end
 end
@@ -61,21 +61,25 @@ class ConversationTest < ActiveSupport::TestCase
    assert conversation.ready?, "The conversation should switch back to ready after a response is made"
  end

-  test "clearing conversation messages" do
+  test "cost limits" do
    conversation = conversations(:kevin)

-    assert conversation.messages.any?, "The conversation should have messages before clearing"
+    conversation.ask("Where does the planning office keep demolition notices?")
+    conversation.respond(
+      "In a locked filing cabinet in a disused lavatory",
+      cost_microcents: Ai::Quota::Money.wrap("$3").in_microcents
+    )

-    original_updated_at = conversation.updated_at
-    conversation.clear
-    assert conversation.updated_at > original_updated_at, "The conversation's updated_at timestamp should change after clearing messages"
+    conversation.ask("What's the meaning of life?")
+    conversation.respond("42", cost_microcents: Ai::Quota::Money.wrap("$120").in_microcents)

-    assert conversation.messages.empty?, "All messages should be deleted when clearing the conversation"
-  end
+    assert_raises Ai::Quota::UsageExceedsQuotaError do
+      conversation.ask("Should you leave a house without a towel?")
+    end

-  test "cost calculation" do
-    conversation = conversations(:kevin)
+    travel 1.month

-    assert_equal "0.01053".to_d, conversation.cost
+    conversation.ask("Should you leave a house without a towel?")
+    conversation.respond("Never", cost_microcents: Ai::Quota::Money.wrap("$0.01").in_microcents)
  end
 end
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  recorded_at: Mon, 18 Aug 2025 14:58:21 GMT
+- request:
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+    uri: https://api.openai.com/v1/chat/completions
+    body:
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