diff --git a/src/shared/src/index.ts b/src/shared/src/index.ts
index 9f512e7..9a3a1da 100644
--- a/src/shared/src/index.ts
+++ b/src/shared/src/index.ts
@@ -2,3 +2,4 @@ export * from './types/index.js';
 export * from './validation/index.js';
 export * from './constants/index.js';
 export * from './utils/index.js';
+export * from './profiles/index.js';
diff --git a/src/shared/src/profiles/index.ts b/src/shared/src/profiles/index.ts
new file mode 100644
index 0000000..76717f1
--- /dev/null
+++ b/src/shared/src/profiles/index.ts
@@ -0,0 +1,5 @@
+export type { ProfileTemplate, ProfileCategory, InstantiatedProfile } from './types.js';
+export { profileTemplateSchema, envTemplateEntrySchema } from './types.js';
+export { ProfileRegistry, defaultRegistry } from './registry.js';
+export { validateTemplate, getMissingEnvVars, instantiateProfile, generateMcpJsonEntry } from './utils.js';
+export * from './templates/index.js';
diff --git a/src/shared/src/profiles/registry.ts b/src/shared/src/profiles/registry.ts
new file mode 100644
index 0000000..22d7df7
--- /dev/null
+++ b/src/shared/src/profiles/registry.ts
@@ -0,0 +1,67 @@
+import type { ProfileTemplate, ProfileCategory } from './types.js';
+import { filesystemTemplate } from './templates/filesystem.js';
+import { githubTemplate } from './templates/github.js';
+import { postgresTemplate } from './templates/postgres.js';
+import { slackTemplate } from './templates/slack.js';
+import { memoryTemplate } from './templates/memory.js';
+import { fetchTemplate } from './templates/fetch.js';
+
+const builtinTemplates: ProfileTemplate[] = [
+  filesystemTemplate,
+  githubTemplate,
+  postgresTemplate,
+  slackTemplate,
+  memoryTemplate,
+  fetchTemplate,
+];
+
+export class ProfileRegistry {
+  private templates = new Map<string, ProfileTemplate>();
+
+  constructor(templates: ProfileTemplate[] = builtinTemplates) {
+    for (const t of templates) {
+      this.templates.set(t.id, t);
+    }
+  }
+
+  getAll(): ProfileTemplate[] {
+    return [...this.templates.values()];
+  }
+
+  getById(id: string): ProfileTemplate | undefined {
+    return this.templates.get(id);
+  }
+
+  getByCategory(category: ProfileCategory): ProfileTemplate[] {
+    return this.getAll().filter((t) => t.category === category);
+  }
+
+  getCategories(): ProfileCategory[] {
+    const cats = new Set<ProfileCategory>();
+    for (const t of this.templates.values()) {
+      cats.add(t.category);
+    }
+    return [...cats];
+  }
+
+  search(query: string): ProfileTemplate[] {
+    const q = query.toLowerCase();
+    return this.getAll().filter(
+      (t) =>
+        t.id.includes(q) ||
+        t.name.includes(q) ||
+        t.displayName.toLowerCase().includes(q) ||
+        t.description.toLowerCase().includes(q),
+    );
+  }
+
+  register(template: ProfileTemplate): void {
+    this.templates.set(template.id, template);
+  }
+
+  has(id: string): boolean {
+    return this.templates.has(id);
+  }
+}
+
+export const defaultRegistry = new ProfileRegistry();
diff --git a/src/shared/src/profiles/templates/fetch.ts b/src/shared/src/profiles/templates/fetch.ts
new file mode 100644
index 0000000..06dd672
--- /dev/null
+++ b/src/shared/src/profiles/templates/fetch.ts
@@ -0,0 +1,15 @@
+import type { ProfileTemplate } from '../types.js';
+
+export const fetchTemplate: ProfileTemplate = {
+  id: 'fetch',
+  name: 'fetch',
+  displayName: 'Fetch',
+  description: 'Fetch and convert web pages to markdown for reading and analysis',
+  category: 'utility',
+  command: 'npx',
+  args: ['-y', '@modelcontextprotocol/server-fetch'],
+  requiredEnvVars: [],
+  optionalEnvVars: [],
+  setupInstructions: 'No configuration required. Fetches web content and converts HTML to markdown.',
+  documentationUrl: 'https://github.com/modelcontextprotocol/servers/tree/main/src/fetch',
+};
diff --git a/src/shared/src/profiles/templates/filesystem.ts b/src/shared/src/profiles/templates/filesystem.ts
new file mode 100644
index 0000000..1239ca7
--- /dev/null
+++ b/src/shared/src/profiles/templates/filesystem.ts
@@ -0,0 +1,16 @@
+import type { ProfileTemplate } from '../types.js';
+
+export const filesystemTemplate: ProfileTemplate = {
+  id: 'filesystem',
+  name: 'filesystem',
+  displayName: 'Filesystem',
+  description: 'Provides read/write access to local filesystem directories',
+  category: 'filesystem',
+  command: 'npx',
+  args: ['-y', '@modelcontextprotocol/server-filesystem'],
+  requiredEnvVars: [],
+  optionalEnvVars: [],
+  setupInstructions:
+    'Append allowed directory paths as additional args. Example: npx -y @modelcontextprotocol/server-filesystem /home/user/docs',
+  documentationUrl: 'https://github.com/modelcontextprotocol/servers/tree/main/src/filesystem',
+};
diff --git a/src/shared/src/profiles/templates/github.ts b/src/shared/src/profiles/templates/github.ts
new file mode 100644
index 0000000..e591379
--- /dev/null
+++ b/src/shared/src/profiles/templates/github.ts
@@ -0,0 +1,22 @@
+import type { ProfileTemplate } from '../types.js';
+
+export const githubTemplate: ProfileTemplate = {
+  id: 'github',
+  name: 'github',
+  displayName: 'GitHub',
+  description: 'Interact with GitHub repositories, issues, pull requests, and more',
+  category: 'integration',
+  command: 'npx',
+  args: ['-y', '@modelcontextprotocol/server-github'],
+  requiredEnvVars: [
+    {
+      name: 'GITHUB_PERSONAL_ACCESS_TOKEN',
+      description: 'GitHub personal access token with repo scope',
+      isSecret: true,
+      setupUrl: 'https://github.com/settings/tokens',
+    },
+  ],
+  optionalEnvVars: [],
+  setupInstructions: 'Create a personal access token at GitHub Settings > Developer settings > Personal access tokens.',
+  documentationUrl: 'https://github.com/modelcontextprotocol/servers/tree/main/src/github',
+};
diff --git a/src/shared/src/profiles/templates/index.ts b/src/shared/src/profiles/templates/index.ts
new file mode 100644
index 0000000..e952df6
--- /dev/null
+++ b/src/shared/src/profiles/templates/index.ts
@@ -0,0 +1,6 @@
+export { filesystemTemplate } from './filesystem.js';
+export { githubTemplate } from './github.js';
+export { postgresTemplate } from './postgres.js';
+export { slackTemplate } from './slack.js';
+export { memoryTemplate } from './memory.js';
+export { fetchTemplate } from './fetch.js';
diff --git a/src/shared/src/profiles/templates/memory.ts b/src/shared/src/profiles/templates/memory.ts
new file mode 100644
index 0000000..0952ff5
--- /dev/null
+++ b/src/shared/src/profiles/templates/memory.ts
@@ -0,0 +1,15 @@
+import type { ProfileTemplate } from '../types.js';
+
+export const memoryTemplate: ProfileTemplate = {
+  id: 'memory',
+  name: 'memory',
+  displayName: 'Memory',
+  description: 'Persistent knowledge graph memory for storing and retrieving entities and relations',
+  category: 'utility',
+  command: 'npx',
+  args: ['-y', '@modelcontextprotocol/server-memory'],
+  requiredEnvVars: [],
+  optionalEnvVars: [],
+  setupInstructions: 'No configuration required. Memory is stored locally in a JSON knowledge graph file.',
+  documentationUrl: 'https://github.com/modelcontextprotocol/servers/tree/main/src/memory',
+};
diff --git a/src/shared/src/profiles/templates/postgres.ts b/src/shared/src/profiles/templates/postgres.ts
new file mode 100644
index 0000000..09ed2e2
--- /dev/null
+++ b/src/shared/src/profiles/templates/postgres.ts
@@ -0,0 +1,21 @@
+import type { ProfileTemplate } from '../types.js';
+
+export const postgresTemplate: ProfileTemplate = {
+  id: 'postgres',
+  name: 'postgres',
+  displayName: 'PostgreSQL',
+  description: 'Query and inspect PostgreSQL databases with read-only access',
+  category: 'database',
+  command: 'npx',
+  args: ['-y', '@modelcontextprotocol/server-postgres'],
+  requiredEnvVars: [
+    {
+      name: 'DATABASE_URL',
+      description: 'PostgreSQL connection string (e.g., postgresql://user:pass@localhost:5432/dbname)',
+      isSecret: true,
+    },
+  ],
+  optionalEnvVars: [],
+  setupInstructions: 'Provide a PostgreSQL connection string. The server provides read-only query access by default.',
+  documentationUrl: 'https://github.com/modelcontextprotocol/servers/tree/main/src/postgres',
+};
diff --git a/src/shared/src/profiles/templates/slack.ts b/src/shared/src/profiles/templates/slack.ts
new file mode 100644
index 0000000..6864ea5
--- /dev/null
+++ b/src/shared/src/profiles/templates/slack.ts
@@ -0,0 +1,28 @@
+import type { ProfileTemplate } from '../types.js';
+
+export const slackTemplate: ProfileTemplate = {
+  id: 'slack',
+  name: 'slack',
+  displayName: 'Slack',
+  description: 'Read and send Slack messages, manage channels, and search workspace content',
+  category: 'integration',
+  command: 'npx',
+  args: ['-y', '@modelcontextprotocol/server-slack'],
+  requiredEnvVars: [
+    {
+      name: 'SLACK_BOT_TOKEN',
+      description: 'Slack Bot User OAuth Token (starts with xoxb-)',
+      isSecret: true,
+      setupUrl: 'https://api.slack.com/apps',
+    },
+    {
+      name: 'SLACK_TEAM_ID',
+      description: 'Slack workspace/team ID',
+      isSecret: false,
+    },
+  ],
+  optionalEnvVars: [],
+  setupInstructions:
+    'Create a Slack App at api.slack.com/apps, install it to your workspace, and copy the Bot User OAuth Token.',
+  documentationUrl: 'https://github.com/modelcontextprotocol/servers/tree/main/src/slack',
+};
diff --git a/src/shared/src/profiles/types.ts b/src/shared/src/profiles/types.ts
new file mode 100644
index 0000000..5baa69e
--- /dev/null
+++ b/src/shared/src/profiles/types.ts
@@ -0,0 +1,35 @@
+import { z } from 'zod';
+
+export const envTemplateEntrySchema = z.object({
+  name: z.string().min(1),
+  description: z.string(),
+  isSecret: z.boolean(),
+  setupUrl: z.string().url().optional(),
+  defaultValue: z.string().optional(),
+});
+
+export const profileTemplateSchema = z.object({
+  id: z.string().min(1).regex(/^[a-z0-9-]+$/, 'ID must be lowercase alphanumeric with hyphens'),
+  name: z.string().min(1),
+  displayName: z.string().min(1),
+  description: z.string().min(1),
+  category: z.enum(['filesystem', 'database', 'integration', 'ai', 'utility', 'development']),
+  command: z.string().min(1),
+  args: z.array(z.string()),
+  requiredEnvVars: z.array(envTemplateEntrySchema).default([]),
+  optionalEnvVars: z.array(envTemplateEntrySchema).default([]),
+  setupInstructions: z.string().optional(),
+  documentationUrl: z.string().url().optional(),
+});
+
+export type ProfileTemplate = z.infer<typeof profileTemplateSchema>;
+
+export type ProfileCategory = ProfileTemplate['category'];
+
+export interface InstantiatedProfile {
+  name: string;
+  templateId: string;
+  command: string;
+  args: string[];
+  env: Record<string, string>;
+}
diff --git a/src/shared/src/profiles/utils.ts b/src/shared/src/profiles/utils.ts
new file mode 100644
index 0000000..f6f39e1
--- /dev/null
+++ b/src/shared/src/profiles/utils.ts
@@ -0,0 +1,61 @@
+import { profileTemplateSchema } from './types.js';
+import type { ProfileTemplate, InstantiatedProfile } from './types.js';
+
+export function validateTemplate(template: unknown): { success: true; data: ProfileTemplate } | { success: false; errors: string[] } {
+  const result = profileTemplateSchema.safeParse(template);
+  if (result.success) {
+    return { success: true, data: result.data };
+  }
+  return {
+    success: false,
+    errors: result.error.issues.map((i) => `${i.path.join('.')}: ${i.message}`),
+  };
+}
+
+export function getMissingEnvVars(template: ProfileTemplate, envValues: Record<string, string>): string[] {
+  return template.requiredEnvVars
+    .filter((e) => !envValues[e.name] && e.defaultValue === undefined)
+    .map((e) => e.name);
+}
+
+export function instantiateProfile(
+  template: ProfileTemplate,
+  envValues: Record<string, string>,
+): InstantiatedProfile {
+  const missing = getMissingEnvVars(template, envValues);
+  if (missing.length > 0) {
+    throw new Error(`Missing required environment variables: ${missing.join(', ')}`);
+  }
+
+  const env: Record<string, string> = {};
+  for (const entry of template.requiredEnvVars) {
+    const value = envValues[entry.name] ?? entry.defaultValue;
+    if (value !== undefined) {
+      env[entry.name] = value;
+    }
+  }
+  for (const entry of template.optionalEnvVars) {
+    const value = envValues[entry.name] ?? entry.defaultValue;
+    if (value !== undefined) {
+      env[entry.name] = value;
+    }
+  }
+
+  return {
+    name: template.name,
+    templateId: template.id,
+    command: template.command,
+    args: [...template.args],
+    env,
+  };
+}
+
+export function generateMcpJsonEntry(profile: InstantiatedProfile): Record<string, unknown> {
+  return {
+    [profile.name]: {
+      command: profile.command,
+      args: profile.args,
+      env: profile.env,
+    },
+  };
+}
diff --git a/src/shared/tests/profiles.test.ts b/src/shared/tests/profiles.test.ts
new file mode 100644
index 0000000..aeb3a16
--- /dev/null
+++ b/src/shared/tests/profiles.test.ts
@@ -0,0 +1,207 @@
+import { describe, it, expect } from 'vitest';
+import {
+  ProfileRegistry,
+  defaultRegistry,
+  profileTemplateSchema,
+  validateTemplate,
+  getMissingEnvVars,
+  instantiateProfile,
+  generateMcpJsonEntry,
+  filesystemTemplate,
+  githubTemplate,
+  postgresTemplate,
+  slackTemplate,
+  memoryTemplate,
+  fetchTemplate,
+} from '../src/profiles/index.js';
+
+const allTemplates = [
+  filesystemTemplate,
+  githubTemplate,
+  postgresTemplate,
+  slackTemplate,
+  memoryTemplate,
+  fetchTemplate,
+];
+
+describe('ProfileTemplate schema', () => {
+  it.each(allTemplates)('validates $id template', (template) => {
+    const result = profileTemplateSchema.safeParse(template);
+    expect(result.success).toBe(true);
+  });
+
+  it('rejects template with missing required fields', () => {
+    const result = profileTemplateSchema.safeParse({ id: 'x' });
+    expect(result.success).toBe(false);
+  });
+
+  it('rejects template with invalid id format', () => {
+    const result = profileTemplateSchema.safeParse({
+      ...filesystemTemplate,
+      id: 'Invalid ID!',
+    });
+    expect(result.success).toBe(false);
+  });
+
+  it('rejects template with invalid category', () => {
+    const result = profileTemplateSchema.safeParse({
+      ...filesystemTemplate,
+      category: 'nonexistent',
+    });
+    expect(result.success).toBe(false);
+  });
+});
+
+describe('ProfileRegistry', () => {
+  it('default registry contains all builtin templates', () => {
+    const ids = defaultRegistry.getAll().map((t) => t.id);
+    expect(ids).toContain('filesystem');
+    expect(ids).toContain('github');
+    expect(ids).toContain('postgres');
+    expect(ids).toContain('slack');
+    expect(ids).toContain('memory');
+    expect(ids).toContain('fetch');
+  });
+
+  it('has no duplicate IDs', () => {
+    const ids = defaultRegistry.getAll().map((t) => t.id);
+    expect(new Set(ids).size).toBe(ids.length);
+  });
+
+  it('getById returns correct template', () => {
+    expect(defaultRegistry.getById('github')).toBe(githubTemplate);
+    expect(defaultRegistry.getById('nonexistent')).toBeUndefined();
+  });
+
+  it('getByCategory filters correctly', () => {
+    const integrations = defaultRegistry.getByCategory('integration');
+    expect(integrations.map((t) => t.id)).toEqual(
+      expect.arrayContaining(['github', 'slack']),
+    );
+    for (const t of integrations) {
+      expect(t.category).toBe('integration');
+    }
+  });
+
+  it('getCategories returns unique categories', () => {
+    const cats = defaultRegistry.getCategories();
+    expect(cats.length).toBeGreaterThan(0);
+    expect(new Set(cats).size).toBe(cats.length);
+  });
+
+  it('search finds by name', () => {
+    const results = defaultRegistry.search('git');
+    expect(results.some((t) => t.id === 'github')).toBe(true);
+  });
+
+  it('search finds by description', () => {
+    const results = defaultRegistry.search('knowledge graph');
+    expect(results.some((t) => t.id === 'memory')).toBe(true);
+  });
+
+  it('search returns empty for no match', () => {
+    expect(defaultRegistry.search('zzzznotfound')).toEqual([]);
+  });
+
+  it('register adds a custom template', () => {
+    const registry = new ProfileRegistry([]);
+    registry.register(filesystemTemplate);
+    expect(registry.has('filesystem')).toBe(true);
+    expect(registry.getAll()).toHaveLength(1);
+  });
+});
+
+describe('validateTemplate', () => {
+  it('returns success for valid template', () => {
+    const result = validateTemplate(filesystemTemplate);
+    expect(result.success).toBe(true);
+  });
+
+  it('returns errors for invalid template', () => {
+    const result = validateTemplate({ id: '' });
+    expect(result.success).toBe(false);
+    if (!result.success) {
+      expect(result.errors.length).toBeGreaterThan(0);
+    }
+  });
+});
+
+describe('getMissingEnvVars', () => {
+  it('returns empty for template with no required env vars', () => {
+    expect(getMissingEnvVars(filesystemTemplate, {})).toEqual([]);
+  });
+
+  it('returns missing vars for github template', () => {
+    const missing = getMissingEnvVars(githubTemplate, {});
+    expect(missing).toContain('GITHUB_PERSONAL_ACCESS_TOKEN');
+  });
+
+  it('returns empty when all vars provided', () => {
+    const missing = getMissingEnvVars(githubTemplate, {
+      GITHUB_PERSONAL_ACCESS_TOKEN: 'ghp_xxx',
+    });
+    expect(missing).toEqual([]);
+  });
+});
+
+describe('instantiateProfile', () => {
+  it('creates profile from template without env vars', () => {
+    const profile = instantiateProfile(filesystemTemplate, {});
+    expect(profile.name).toBe('filesystem');
+    expect(profile.templateId).toBe('filesystem');
+    expect(profile.command).toBe('npx');
+    expect(profile.args).toEqual(['-y', '@modelcontextprotocol/server-filesystem']);
+    expect(profile.env).toEqual({});
+  });
+
+  it('creates profile with env vars', () => {
+    const profile = instantiateProfile(githubTemplate, {
+      GITHUB_PERSONAL_ACCESS_TOKEN: 'ghp_test123',
+    });
+    expect(profile.env.GITHUB_PERSONAL_ACCESS_TOKEN).toBe('ghp_test123');
+  });
+
+  it('throws on missing required env vars', () => {
+    expect(() => instantiateProfile(githubTemplate, {})).toThrow(
+      'Missing required environment variables',
+    );
+  });
+
+  it('includes optional env vars when provided', () => {
+    const profile = instantiateProfile(filesystemTemplate, {
+      SOME_OPTIONAL: 'value',
+    });
+    // Optional vars not in template are not included
+    expect(profile.env).toEqual({});
+  });
+});
+
+describe('generateMcpJsonEntry', () => {
+  it('generates valid .mcp.json entry', () => {
+    const profile = instantiateProfile(githubTemplate, {
+      GITHUB_PERSONAL_ACCESS_TOKEN: 'ghp_abc',
+    });
+    const entry = generateMcpJsonEntry(profile);
+    expect(entry).toEqual({
+      github: {
+        command: 'npx',
+        args: ['-y', '@modelcontextprotocol/server-github'],
+        env: {
+          GITHUB_PERSONAL_ACCESS_TOKEN: 'ghp_abc',
+        },
+      },
+    });
+  });
+
+  it('generates entry with empty env for no-env template', () => {
+    const profile = instantiateProfile(memoryTemplate, {});
+    const entry = generateMcpJsonEntry(profile);
+    expect(entry).toEqual({
+      memory: {
+        command: 'npx',
+        args: ['-y', '@modelcontextprotocol/server-memory'],
+        env: {},
+      },
+    });
+  });
+});