diff --git a/plugins/financial-advisor/src/index.ts b/plugins/financial-advisor/src/index.ts
index ed01c3e..4e681aa 100644
--- a/plugins/financial-advisor/src/index.ts
+++ b/plugins/financial-advisor/src/index.ts
@@ -5,11 +5,12 @@
  * inference rules, budgets, goals, reports, and contextual advice.
  */
 
-import type { RadixPlugin } from '@plures/pares-radix';
+import type { RadixPlugin, PluginContext } from '@plures/pares-radix';
 import { recurringAmountPattern } from './rules/recurring-amount.js';
 import { vendorClustering } from './rules/vendor-clustering.js';
 import { refundDetection } from './rules/refund-detection.js';
 import { taxVarianceDetection } from './rules/tax-variance.js';
+import { setPluginContext, clearPluginContext } from './lib/context.js';
 
 const financialAdvisor: RadixPlugin = {
   id: 'financial-advisor',
@@ -219,13 +220,15 @@ const financialAdvisor: RadixPlugin = {
 
   constraints: [],
 
-  async onActivate() {
+  async onActivate(ctx: PluginContext) {
     console.log('[financial-advisor] Plugin activated');
-    // TODO: Initialize PluresDB collections, load inference rules
+    setPluginContext(ctx);
+    // TODO: load inference rules into inference engine
   },
 
   async onDeactivate() {
     console.log('[financial-advisor] Plugin deactivated');
+    clearPluginContext();
   },
 
   async onDataExport() {
diff --git a/plugins/financial-advisor/src/lib/accounts.ts b/plugins/financial-advisor/src/lib/accounts.ts
new file mode 100644
index 0000000..ffa779b
--- /dev/null
+++ b/plugins/financial-advisor/src/lib/accounts.ts
@@ -0,0 +1,35 @@
+/**
+ * Account types and helpers for the fa-accounts PluresDB collection.
+ */
+
+export type AccountType = 'checking' | 'savings' | 'credit' | 'investment';
+
+export interface Account {
+  id: string;
+  name: string;
+  institution: string;
+  type: AccountType;
+  balance: number;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export const FA_ACCOUNTS_COLLECTION = 'fa-accounts';
+
+export function generateAccountId(): string {
+  return `acct-${crypto.randomUUID()}`;
+}
+
+export const ACCOUNT_TYPE_LABELS: Record<AccountType, string> = {
+  checking: 'Checking',
+  savings: 'Savings',
+  credit: 'Credit Card',
+  investment: 'Investment',
+};
+
+export const ACCOUNT_TYPE_ICONS: Record<AccountType, string> = {
+  checking: '🏦',
+  savings: '💰',
+  credit: '💳',
+  investment: '📈',
+};
diff --git a/plugins/financial-advisor/src/lib/context.ts b/plugins/financial-advisor/src/lib/context.ts
new file mode 100644
index 0000000..35a8895
--- /dev/null
+++ b/plugins/financial-advisor/src/lib/context.ts
@@ -0,0 +1,24 @@
+/**
+ * Plugin context singleton for financial-advisor.
+ *
+ * `setPluginContext` is called from `onActivate` so that Svelte page
+ * components can retrieve the PluresDB data API, notify API, etc.
+ * without needing Svelte's own `setContext` / `getContext` mechanism
+ * (which is scoped to component trees and unavailable in lifecycle hooks).
+ */
+
+import type { PluginContext } from '@plures/pares-radix';
+
+let _context: PluginContext | null = null;
+
+export function setPluginContext(ctx: PluginContext): void {
+  _context = ctx;
+}
+
+export function clearPluginContext(): void {
+  _context = null;
+}
+
+export function getPluginContext(): PluginContext | null {
+  return _context;
+}
diff --git a/plugins/financial-advisor/src/pages/Accounts.svelte b/plugins/financial-advisor/src/pages/Accounts.svelte
new file mode 100644
index 0000000..b7e71f0
--- /dev/null
+++ b/plugins/financial-advisor/src/pages/Accounts.svelte
@@ -0,0 +1,787 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import { getPluginContext } from '../lib/context.js';
+  import {
+    FA_ACCOUNTS_COLLECTION,
+    ACCOUNT_TYPE_LABELS,
+    ACCOUNT_TYPE_ICONS,
+    generateAccountId,
+    type Account,
+    type AccountType,
+  } from '../lib/accounts.js';
+
+  let ctx: any;
+  let collection: any;
+
+  // ── Page state ────────────────────────────────────────────────────────────
+  let accounts = $state<Account[]>([]);
+  let loading = $state(true);
+
+  // ── Form dialog state ─────────────────────────────────────────────────────
+  let showForm = $state(false);
+  let editingAccount = $state<Account | null>(null);
+  let saving = $state(false);
+  let formError = $state('');
+
+  // ── Form fields ───────────────────────────────────────────────────────────
+  let formName = $state('');
+  let formInstitution = $state('');
+  let formType = $state<AccountType>('checking');
+  let formBalance = $state('0.00');
+
+  // ── Delete confirmation state ─────────────────────────────────────────────
+  let confirmDeleteId = $state<string | null>(null);
+
+  // ── Derived ───────────────────────────────────────────────────────────────
+  const totalBalance = $derived(
+    accounts.reduce((sum, a) => sum + a.balance, 0),
+  );
+  const confirmDeleteTarget = $derived(
+    accounts.find(a => a.id === confirmDeleteId) ?? null,
+  );
+  const isEditMode = $derived(editingAccount !== null);
+
+  // ── Load accounts on mount ────────────────────────────────────────────────
+  onMount(() => {
+    ctx = getPluginContext();
+    collection = ctx?.data.collection<Account>(FA_ACCOUNTS_COLLECTION);
+    loadAccounts().catch(() => {
+      ctx?.notify.error('Failed to load accounts.');
+      loading = false;
+    });
+  });
+
+  async function loadAccounts(): Promise<void> {
+    loading = true;
+    try {
+      accounts = (await collection?.query()) ?? [];
+    } catch {
+      ctx?.notify.error('Failed to load accounts.');
+      accounts = [];
+    } finally {
+      loading = false;
+    }
+  }
+
+  // ── Modal action — wires <dialog> to showModal() for native focus trapping,
+  //    backdrop, and Escape handling. Click on ::backdrop closes the dialog.
+  function useModal(node: HTMLDialogElement, params: { onClose: () => void }) {
+    function handleCancel(e: Event) {
+      // Prevent the browser from closing the dialog on its own so that Svelte
+      // state (the {#if} block) remains the single source of truth for visibility.
+      e.preventDefault();
+      params.onClose();
+    }
+    function handleBackdropClick(e: MouseEvent) {
+      // A click whose direct target is the <dialog> element itself means the
+      // user clicked on the ::backdrop (outside the dialog box).
+      if (e.target === node) params.onClose();
+    }
+    node.showModal();
+    node.addEventListener('cancel', handleCancel);
+    node.addEventListener('click', handleBackdropClick);
+    return {
+      destroy() {
+        node.removeEventListener('cancel', handleCancel);
+        node.removeEventListener('click', handleBackdropClick);
+        if (node.open) node.close();
+      },
+    };
+  }
+
+  // ── Form helpers ──────────────────────────────────────────────────────────
+  function openCreate(): void {
+    editingAccount = null;
+    formName = '';
+    formInstitution = '';
+    formType = 'checking';
+    formBalance = '0.00';
+    formError = '';
+    showForm = true;
+  }
+
+  function openEdit(account: Account): void {
+    editingAccount = account;
+    formName = account.name;
+    formInstitution = account.institution;
+    formType = account.type;
+    formBalance = account.balance.toFixed(2);
+    formError = '';
+    showForm = true;
+  }
+
+  function closeForm(): void {
+    showForm = false;
+    editingAccount = null;
+    formError = '';
+  }
+
+  async function saveAccount(): Promise<void> {
+    formError = '';
+
+    if (!formName.trim()) {
+      formError = 'Account name is required.';
+      return;
+    }
+
+    const balance = parseFloat(formBalance);
+    if (isNaN(balance)) {
+      formError = 'Balance must be a valid number.';
+      return;
+    }
+
+    if (!collection) {
+      formError = 'Database not available.';
+      return;
+    }
+
+    saving = true;
+    try {
+      const now = new Date().toISOString();
+      if (editingAccount) {
+        const updated: Account = {
+          ...editingAccount,
+          name: formName.trim(),
+          institution: formInstitution.trim(),
+          type: formType,
+          balance,
+          updatedAt: now,
+        };
+        await collection.put(updated.id, updated);
+        accounts = accounts.map(a => (a.id === updated.id ? updated : a));
+        ctx?.notify.success('Account updated.');
+      } else {
+        const account: Account = {
+          id: generateAccountId(),
+          name: formName.trim(),
+          institution: formInstitution.trim(),
+          type: formType,
+          balance,
+          createdAt: now,
+          updatedAt: now,
+        };
+        await collection.put(account.id, account);
+        accounts = [...accounts, account];
+        ctx?.notify.success('Account created.');
+      }
+      closeForm();
+    } catch {
+      formError = 'Failed to save account. Please try again.';
+      ctx?.notify.error('Failed to save account.');
+    } finally {
+      saving = false;
+    }
+  }
+
+  async function deleteAccount(id: string): Promise<void> {
+    if (!collection) return;
+    try {
+      await collection.delete(id);
+      accounts = accounts.filter(a => a.id !== id);
+      ctx?.notify.success('Account deleted.');
+    } catch {
+      ctx?.notify.error('Failed to delete account.');
+    }
+    confirmDeleteId = null;
+  }
+
+  function formatCurrency(amount: number): string {
+    return new Intl.NumberFormat('en-US', {
+      style: 'currency',
+      currency: 'USD',
+    }).format(amount);
+  }
+</script>
+
+<!-- ── Page ──────────────────────────────────────────────────────────────── -->
+<div class="accounts-page">
+  <!-- Header -->
+  <header class="page-header">
+    <div class="page-header__text">
+      <h1 class="page-header__title">Accounts</h1>
+      {#if accounts.length > 0}
+        <p class="page-header__subtitle">
+          {accounts.length} account{accounts.length === 1 ? '' : 's'} ·
+          Net balance: {formatCurrency(totalBalance)}
+        </p>
+      {/if}
+    </div>
+    {#if accounts.length > 0}
+      <button class="btn btn--primary" onclick={openCreate} aria-label="Add account">
+        + Add Account
+      </button>
+    {/if}
+  </header>
+
+  <!-- Loading skeleton -->
+  {#if loading}
+    <div class="skeleton-list" aria-busy="true" aria-label="Loading accounts">
+      {#each [1, 2, 3] as _}
+        <div class="skeleton-card"></div>
+      {/each}
+    </div>
+
+  <!-- Empty state -->
+  {:else if accounts.length === 0}
+    <div class="empty-state" role="region" aria-label="No accounts yet">
+      <span class="empty-state__icon" aria-hidden="true">🏦</span>
+      <h2 class="empty-state__heading">No accounts yet</h2>
+      <p class="empty-state__body">
+        Add your first bank account, credit card, or investment account to
+        start tracking your finances.
+      </p>
+      <button class="btn btn--primary btn--lg" onclick={openCreate}>
+        Add Your First Account
+      </button>
+    </div>
+
+  <!-- Account list -->
+  {:else}
+    <ul class="account-list" aria-label="Account list">
+      {#each accounts as account (account.id)}
+        <li class="account-card">
+          <span class="account-card__icon" aria-hidden="true">
+            {ACCOUNT_TYPE_ICONS[account.type]}
+          </span>
+          <div class="account-card__info">
+            <span class="account-card__name">{account.name}</span>
+            {#if account.institution}
+              <span class="account-card__institution">{account.institution}</span>
+            {/if}
+            <span class="account-card__type">{ACCOUNT_TYPE_LABELS[account.type]}</span>
+          </div>
+          <span
+            class="account-card__balance"
+            class:account-card__balance--negative={account.balance < 0}
+          >
+            {formatCurrency(account.balance)}
+          </span>
+          <div class="account-card__actions">
+            <button
+              class="btn btn--ghost btn--sm"
+              onclick={() => openEdit(account)}
+              aria-label={`Edit ${account.name}`}
+            >
+              Edit
+            </button>
+            <button
+              class="btn btn--ghost btn--sm btn--danger"
+              onclick={() => (confirmDeleteId = account.id)}
+              aria-label={`Delete ${account.name}`}
+            >
+              Delete
+            </button>
+          </div>
+        </li>
+      {/each}
+    </ul>
+  {/if}
+</div>
+
+<!-- ── Account form dialog ────────────────────────────────────────────────── -->
+{#if showForm}
+  <dialog
+    use:useModal={{ onClose: closeForm }}
+    class="dialog"
+    aria-modal="true"
+    aria-labelledby="dialog-title"
+  >
+    <header class="dialog__header">
+      <h2 class="dialog__title" id="dialog-title">
+        {isEditMode ? 'Edit Account' : 'Add Account'}
+      </h2>
+      <button
+        class="btn btn--ghost btn--icon"
+        onclick={closeForm}
+        aria-label="Close dialog"
+      >
+        ✕
+      </button>
+    </header>
+
+    <form
+      class="dialog__body"
+      onsubmit={(e) => {
+        e.preventDefault();
+        saveAccount().catch(() => {
+          formError = 'Failed to save account. Please try again.';
+        });
+      }}
+      novalidate
+    >
+      {#if formError}
+        <p class="form-error" role="alert">{formError}</p>
+      {/if}
+
+      <div class="field">
+        <label class="field__label" for="account-name">
+          Account Name <span aria-hidden="true">*</span>
+        </label>
+        <input
+          id="account-name"
+          class="field__input"
+          type="text"
+          bind:value={formName}
+          placeholder="e.g. Main Checking"
+          required
+          autocomplete="off"
+        />
+      </div>
+
+      <div class="field">
+        <label class="field__label" for="account-institution">
+          Institution
+        </label>
+        <input
+          id="account-institution"
+          class="field__input"
+          type="text"
+          bind:value={formInstitution}
+          placeholder="e.g. Chase, Ally, Vanguard"
+          autocomplete="off"
+        />
+      </div>
+
+      <div class="field">
+        <label class="field__label" for="account-type">
+          Account Type <span aria-hidden="true">*</span>
+        </label>
+        <select id="account-type" class="field__select" bind:value={formType}>
+          <option value="checking">Checking</option>
+          <option value="savings">Savings</option>
+          <option value="credit">Credit Card</option>
+          <option value="investment">Investment</option>
+        </select>
+      </div>
+
+      <div class="field">
+        <label class="field__label" for="account-balance">
+          {isEditMode ? 'Current Balance' : 'Starting Balance'}
+          <span aria-hidden="true">*</span>
+        </label>
+        <div class="field__prefix-wrap">
+          <span class="field__prefix" aria-hidden="true">$</span>
+          <input
+            id="account-balance"
+            class="field__input field__input--prefixed"
+            type="number"
+            step="0.01"
+            bind:value={formBalance}
+            placeholder="0.00"
+            required
+          />
+        </div>
+      </div>
+
+      <footer class="dialog__footer">
+        <button
+          class="btn btn--ghost"
+          type="button"
+          onclick={closeForm}
+          disabled={saving}
+        >
+          Cancel
+        </button>
+        <button class="btn btn--primary" type="submit" disabled={saving}>
+          {saving ? 'Saving…' : isEditMode ? 'Save Changes' : 'Add Account'}
+        </button>
+      </footer>
+    </form>
+  </dialog>
+{/if}
+
+<!-- ── Delete confirmation dialog ────────────────────────────────────────── -->
+{#if confirmDeleteId !== null}
+  <dialog
+    use:useModal={{ onClose: () => (confirmDeleteId = null) }}
+    class="dialog dialog--sm"
+    aria-modal="true"
+    aria-labelledby="confirm-title"
+  >
+    <header class="dialog__header">
+      <h2 class="dialog__title" id="confirm-title">Delete Account?</h2>
+    </header>
+    <div class="dialog__body">
+      <p class="dialog__text">
+        Are you sure you want to delete
+        <strong>{confirmDeleteTarget?.name ?? 'this account'}</strong>?
+        This action cannot be undone.
+      </p>
+    </div>
+    <footer class="dialog__footer">
+      <button
+        class="btn btn--ghost"
+        onclick={() => (confirmDeleteId = null)}
+      >
+        Cancel
+      </button>
+      <button
+        class="btn btn--danger"
+        onclick={() => {
+          if (confirmDeleteId) {
+            deleteAccount(confirmDeleteId).catch(() => {
+              ctx?.notify.error('Failed to delete account.');
+            });
+          }
+        }}
+      >
+        Delete
+      </button>
+    </footer>
+  </dialog>
+{/if}
+
+<style>
+  /* ── Layout ──────────────────────────────────────────────────────────────── */
+  .accounts-page {
+    padding: var(--space-6, 1.5rem);
+    max-width: 48rem;
+    margin: 0 auto;
+  }
+
+  /* ── Page header ─────────────────────────────────────────────────────────── */
+  .page-header {
+    display: flex;
+    align-items: flex-start;
+    justify-content: space-between;
+    gap: var(--space-4, 1rem);
+    margin-bottom: var(--space-6, 1.5rem);
+  }
+
+  .page-header__title {
+    font-size: 1.5rem;
+    font-weight: 700;
+    margin: 0;
+    color: var(--color-text, #111827);
+  }
+
+  .page-header__subtitle {
+    font-size: 0.875rem;
+    color: var(--color-text-muted, #6b7280);
+    margin: var(--space-1, 0.25rem) 0 0;
+  }
+
+  /* ── Skeleton loader ─────────────────────────────────────────────────────── */
+  .skeleton-list {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-3, 0.75rem);
+  }
+
+  .skeleton-card {
+    height: 5rem;
+    border-radius: var(--radius-lg, 0.75rem);
+    background: var(--color-surface-2, #f3f4f6);
+    animation: pulse 1.4s ease-in-out infinite;
+  }
+
+  @keyframes pulse {
+    0%, 100% { opacity: 1; }
+    50% { opacity: 0.5; }
+  }
+
+  /* ── Empty state ─────────────────────────────────────────────────────────── */
+  .empty-state {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    text-align: center;
+    padding: var(--space-16, 4rem) var(--space-6, 1.5rem);
+    gap: var(--space-4, 1rem);
+  }
+
+  .empty-state__icon {
+    font-size: 3rem;
+    line-height: 1;
+  }
+
+  .empty-state__heading {
+    font-size: 1.25rem;
+    font-weight: 600;
+    margin: 0;
+    color: var(--color-text, #111827);
+  }
+
+  .empty-state__body {
+    font-size: 0.9375rem;
+    color: var(--color-text-muted, #6b7280);
+    max-width: 28rem;
+    margin: 0;
+    line-height: 1.6;
+  }
+
+  /* ── Account list ────────────────────────────────────────────────────────── */
+  .account-list {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-3, 0.75rem);
+  }
+
+  .account-card {
+    display: flex;
+    align-items: center;
+    gap: var(--space-4, 1rem);
+    padding: var(--space-4, 1rem) var(--space-5, 1.25rem);
+    background: var(--color-surface, #ffffff);
+    border: 1px solid var(--color-border, #e5e7eb);
+    border-radius: var(--radius-lg, 0.75rem);
+    transition: box-shadow 0.15s ease;
+  }
+
+  .account-card:hover {
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
+  }
+
+  .account-card__icon {
+    font-size: 1.75rem;
+    line-height: 1;
+    flex-shrink: 0;
+  }
+
+  .account-card__info {
+    flex: 1;
+    min-width: 0;
+    display: flex;
+    flex-direction: column;
+    gap: 0.125rem;
+  }
+
+  .account-card__name {
+    font-weight: 600;
+    color: var(--color-text, #111827);
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+  }
+
+  .account-card__institution {
+    font-size: 0.8125rem;
+    color: var(--color-text-muted, #6b7280);
+  }
+
+  .account-card__type {
+    font-size: 0.75rem;
+    color: var(--color-text-subtle, #9ca3af);
+    text-transform: uppercase;
+    letter-spacing: 0.04em;
+  }
+
+  .account-card__balance {
+    font-size: 1.0625rem;
+    font-weight: 600;
+    color: var(--color-text, #111827);
+    white-space: nowrap;
+    flex-shrink: 0;
+  }
+
+  .account-card__balance--negative {
+    color: var(--color-danger, #dc2626);
+  }
+
+  .account-card__actions {
+    display: flex;
+    gap: var(--space-2, 0.5rem);
+    flex-shrink: 0;
+  }
+
+  /* ── Dialog backdrop (native modal via showModal()) ─────────────────────── */
+  .dialog::backdrop {
+    background: rgba(0, 0, 0, 0.4);
+  }
+
+  /* ── Dialog ──────────────────────────────────────────────────────────────── */
+  .dialog {
+    position: fixed;
+    inset: 0;
+    margin: auto;
+    width: min(95vw, 28rem);
+    height: fit-content;
+    background: var(--color-surface, #ffffff);
+    border: 1px solid var(--color-border, #e5e7eb);
+    border-radius: var(--radius-xl, 1rem);
+    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
+    padding: 0;
+  }
+
+  .dialog--sm {
+    width: min(95vw, 22rem);
+  }
+
+  .dialog__header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: var(--space-5, 1.25rem) var(--space-5, 1.25rem) 0;
+  }
+
+  .dialog__title {
+    font-size: 1.125rem;
+    font-weight: 700;
+    margin: 0;
+    color: var(--color-text, #111827);
+  }
+
+  .dialog__body {
+    padding: var(--space-5, 1.25rem);
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-4, 1rem);
+  }
+
+  .dialog__text {
+    color: var(--color-text, #111827);
+    margin: 0;
+    line-height: 1.6;
+  }
+
+  .dialog__footer {
+    display: flex;
+    justify-content: flex-end;
+    gap: var(--space-3, 0.75rem);
+    padding: var(--space-4, 1rem) var(--space-5, 1.25rem) var(--space-5, 1.25rem);
+  }
+
+  /* ── Form fields ─────────────────────────────────────────────────────────── */
+  .field {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-1, 0.25rem);
+  }
+
+  .field__label {
+    font-size: 0.875rem;
+    font-weight: 500;
+    color: var(--color-text, #111827);
+  }
+
+  .field__input,
+  .field__select {
+    width: 100%;
+    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
+    font-size: 0.9375rem;
+    border: 1px solid var(--color-border, #d1d5db);
+    border-radius: var(--radius-md, 0.5rem);
+    background: var(--color-surface, #ffffff);
+    color: var(--color-text, #111827);
+    transition: border-color 0.15s ease, box-shadow 0.15s ease;
+    box-sizing: border-box;
+  }
+
+  .field__input:focus,
+  .field__select:focus {
+    outline: none;
+    border-color: var(--color-primary, #6366f1);
+    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
+  }
+
+  .field__prefix-wrap {
+    position: relative;
+    display: flex;
+    align-items: center;
+  }
+
+  .field__prefix {
+    position: absolute;
+    left: var(--space-3, 0.75rem);
+    color: var(--color-text-muted, #6b7280);
+    pointer-events: none;
+    font-size: 0.9375rem;
+  }
+
+  .field__input--prefixed {
+    padding-left: var(--space-6, 1.5rem);
+  }
+
+  .form-error {
+    font-size: 0.875rem;
+    color: var(--color-danger, #dc2626);
+    background: var(--color-danger-subtle, #fef2f2);
+    border: 1px solid var(--color-danger-border, #fecaca);
+    border-radius: var(--radius-md, 0.5rem);
+    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
+    margin: 0;
+  }
+
+  /* ── Buttons ─────────────────────────────────────────────────────────────── */
+  .btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    gap: var(--space-2, 0.5rem);
+    padding: var(--space-2, 0.5rem) var(--space-4, 1rem);
+    font-size: 0.9375rem;
+    font-weight: 500;
+    border-radius: var(--radius-md, 0.5rem);
+    border: 1px solid transparent;
+    cursor: pointer;
+    transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
+    white-space: nowrap;
+  }
+
+  .btn:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+  }
+
+  .btn--primary {
+    background: var(--color-primary, #6366f1);
+    color: #ffffff;
+    border-color: var(--color-primary, #6366f1);
+  }
+
+  .btn--primary:hover:not(:disabled) {
+    background: var(--color-primary-hover, #4f46e5);
+    border-color: var(--color-primary-hover, #4f46e5);
+  }
+
+  .btn--ghost {
+    background: transparent;
+    color: var(--color-text, #111827);
+    border-color: var(--color-border, #d1d5db);
+  }
+
+  .btn--ghost:hover:not(:disabled) {
+    background: var(--color-surface-2, #f3f4f6);
+  }
+
+  .btn--danger {
+    background: var(--color-danger, #dc2626);
+    color: #ffffff;
+    border-color: var(--color-danger, #dc2626);
+  }
+
+  .btn--danger:hover:not(:disabled) {
+    background: var(--color-danger-hover, #b91c1c);
+    border-color: var(--color-danger-hover, #b91c1c);
+  }
+
+  .btn--ghost.btn--danger {
+    background: transparent;
+    color: var(--color-danger, #dc2626);
+    border-color: transparent;
+  }
+
+  .btn--ghost.btn--danger:hover:not(:disabled) {
+    background: var(--color-danger-subtle, #fef2f2);
+  }
+
+  .btn--sm {
+    padding: var(--space-1, 0.25rem) var(--space-3, 0.75rem);
+    font-size: 0.8125rem;
+  }
+
+  .btn--lg {
+    padding: var(--space-3, 0.75rem) var(--space-6, 1.5rem);
+    font-size: 1rem;
+  }
+
+  .btn--icon {
+    padding: var(--space-1, 0.25rem);
+    border: none;
+    font-size: 1rem;
+    line-height: 1;
+  }
+</style>
diff --git a/types/pares-radix.d.ts b/types/pares-radix.d.ts
index 187fe71..1d7e8a2 100644
--- a/types/pares-radix.d.ts
+++ b/types/pares-radix.d.ts
@@ -103,6 +103,56 @@ export interface InferenceRule {
   evaluate(input: InferenceInput): InferenceResult | null;
 }
 
+export interface DataCollection<T = Record<string, unknown>> {
+  put(id: string, data: T): Promise<void>;
+  get(id: string): Promise<T | null>;
+  query(filter?: Record<string, unknown>): Promise<T[]>;
+  count(): Promise<number>;
+  delete(id: string): Promise<void>;
+}
+
+export interface NotifyAPI {
+  success(message: string): void;
+  error(message: string): void;
+  info(message: string): void;
+  warning(message: string): void;
+}
+
+export interface NavigationAPI {
+  goto(path: string): void;
+  setBreadcrumbs(crumbs: Array<{ label: string; href?: string }>): void;
+}
+
+export interface SettingsAPI {
+  get<T = unknown>(key: string): T;
+  set(key: string, value: unknown): void;
+  subscribe(key: string, callback: (value: unknown) => void): () => void;
+}
+
+export interface LLMAPI {
+  available(): boolean;
+  remainingBudget(): number;
+  complete(prompt: string, context: Record<string, unknown>): Promise<string>;
+}
+
+export interface InferenceAPI {
+  infer(type: string, record: Record<string, unknown>): Promise<InferenceResult[]>;
+  getInferences(sourceId: string): Promise<InferenceResult[]>;
+  confirm(inferenceId: string, accepted: boolean): Promise<void>;
+  getDecisionChain(inferenceId: string): Promise<unknown[]>;
+}
+
+export interface PluginContext {
+  data: {
+    collection<T = Record<string, unknown>>(name: string): DataCollection<T>;
+  };
+  notify: NotifyAPI;
+  navigation: NavigationAPI;
+  settings: SettingsAPI;
+  llm: LLMAPI;
+  inference: InferenceAPI;
+}
+
 export interface RadixPlugin {
   id: string;
   name: string;
@@ -118,7 +168,7 @@ export interface RadixPlugin {
   rules?: InferenceRule[];
   expectations?: Expectation[];
   constraints?: unknown[];
-  onActivate?: (ctx: unknown) => Promise<void>;
+  onActivate?: (ctx: PluginContext) => Promise<void>;
   onDeactivate?: () => Promise<void>;
   onDataExport?: () => Promise<Record<string, unknown>>;
   onDataImport?: (data: unknown) => Promise<void>;