docs: post install notes (#1653)

* feat: tea automation prereq prompts

* fix: addressed PR comments

* docs: added docs on how to set the post install output in the module

* addressed PR request from Brian

tools/cli/README.md

@@ -5,3 +5,56 @@
 For external official modules to be discoverable during install, ensure an entry for the external repo is added to external-official-modules.yaml.
 
 For community modules - this will be handled in a different way. This file is only for registration of modules under the bmad-code-org.
+
+## Post-Install Notes
+
+Modules can display setup guidance to users after configuration is collected during `npx bmad-method install`. Notes are defined in the module's own `module.yaml` — no changes to the installer are needed.
+
+### Simple Format
+
+Always displayed after the module is configured:
+
+```yaml
+post-install-notes: |
+  Remember to set the API_KEY environment variable.
+  See: https://example.com/setup
+```
+
+### Conditional Format
+
+Display different messages based on a config question's answer:
+
+```yaml
+post-install-notes:
+  config_key_name:
+    value1: |
+      Instructions for value1...
+    value2: |
+      Instructions for value2...
+```
+
+Values without an entry (e.g., `none`) display nothing. Multiple config keys can each have their own conditional notes.
+
+### Example: TEA Module
+
+The TEA module uses the conditional format keyed on `tea_browser_automation`:
+
+```yaml
+post-install-notes:
+  tea_browser_automation:
+    cli: |
+      Playwright CLI Setup:
+        npm install -g @playwright/cli@latest
+        playwright-cli install --skills
+    mcp: |
+      Playwright MCP Setup (two servers):
+        1. playwright    — npx @playwright/mcp@latest
+        2. playwright-test — npx playwright run-test-mcp-server
+    auto: |
+      Playwright CLI Setup:
+        ...
+      Playwright MCP Setup (two servers):
+        ...
+```
+
+When a user selects `auto`, they see both CLI and MCP instructions. When they select `none`, nothing is shown.

tools/cli/installers/lib/core/config-collector.js

@@ -550,6 +550,8 @@ class ConfigCollector {
       }
     }
 
+    await this.displayModulePostConfigNotes(moduleName, moduleConfig);
+
     return newKeys.length > 0 || newStaticKeys.length > 0; // Return true if we had any new fields (interactive or static)
   }
 
@@ -923,6 +925,8 @@ class ConfigCollector {
         }
       }
     }
+
+    await this.displayModulePostConfigNotes(moduleName, moduleConfig);
   }
 
   /**
@@ -1195,6 +1199,59 @@ class ConfigCollector {
     return question;
   }
 
+  /**
+   * Display post-configuration notes for a module
+   * Shows prerequisite guidance based on collected config values
+   * Reads notes from the module's `post-install-notes` section in module.yaml
+   * Supports two formats:
+   *   - Simple string: always displayed
+   *   - Object keyed by config field name, with value-specific messages
+   * @param {string} moduleName - Module name
+   * @param {Object} moduleConfig - Parsed module.yaml content
+   */
+  async displayModulePostConfigNotes(moduleName, moduleConfig) {
+    if (this._silentConfig) return;
+    if (!moduleConfig || !moduleConfig['post-install-notes']) return;
+
+    const notes = moduleConfig['post-install-notes'];
+    const color = await prompts.getColor();
+
+    // Format 1: Simple string - always display
+    if (typeof notes === 'string') {
+      await prompts.log.message('');
+      for (const line of notes.trim().split('\n')) {
+        await prompts.log.message(color.dim(line));
+      }
+      return;
+    }
+
+    // Format 2: Conditional on config values
+    if (typeof notes === 'object') {
+      const config = this.collectedConfig[moduleName];
+      if (!config) return;
+
+      let hasOutput = false;
+      for (const [configKey, valueMessages] of Object.entries(notes)) {
+        const selectedValue = config[configKey];
+        if (!selectedValue || !valueMessages[selectedValue]) continue;
+
+        if (hasOutput) await prompts.log.message('');
+        hasOutput = true;
+
+        const message = valueMessages[selectedValue];
+        await prompts.log.message('');
+        for (const line of message.trim().split('\n')) {
+          const trimmedLine = line.trim();
+          if (trimmedLine.endsWith(':') && !trimmedLine.startsWith(' ')) {
+            await prompts.log.info(color.bold(trimmedLine));
+          } else {
+            await prompts.log.message(color.dim('  ' + trimmedLine));
+          }
+        }
+      }
+    }
+  }
+
   /**
    * Deep merge two objects
    * @param {Object} target - Target object