diff --git a/01 Projects/video-accessibility/Video Accessibility Platform.md b/01 Projects/video-accessibility/Video Accessibility Platform.md
index 8099166..43e71b3 100644
--- a/01 Projects/video-accessibility/Video Accessibility Platform.md	
+++ b/01 Projects/video-accessibility/Video Accessibility Platform.md	
@@ -119,6 +119,10 @@ Key env vars (see `.env.prod.example` for complete list):
 - RBAC enforced server-side; all reviewer actions emit audit log entries
 
 ## Sessions
+### 2026-05-01 – Install agent-sdk-dev plugin for development
+**Asked:** Install agent-sdk-dev plugin for development
+**Done:** Successfully installed agent-sdk-dev plugin and verified features/ folder is empty
+
 ### 2026-05-01 – Asked for plugin installation and TypeScript
 **Asked:** Asked for plugin installation and TypeScript type resolution
 **Done:** Installed agent-sdk-dev plugin and identified type inference issue with briefsData.briefs property
diff --git a/99 Daily/2026-05-01.md b/99 Daily/2026-05-01.md
index 4331c15..1a778d0 100644
--- a/99 Daily/2026-05-01.md	
+++ b/99 Daily/2026-05-01.md	
@@ -143,3 +143,6 @@ tags: [daily]
 - 12:14 (2min) | `video-accessibility`
   - **Asked:** Asked for plugin installation and TypeScript type resolution
   - **Done:** Installed agent-sdk-dev plugin and identified type inference issue with briefsData.briefs property
+- 12:15 | `video-accessibility`
+  - **Asked:** Install agent-sdk-dev plugin for development
+  - **Done:** Successfully installed agent-sdk-dev plugin and verified features/ folder is empty
diff --git a/wiki/tech-patterns/_index.md b/wiki/tech-patterns/_index.md
index 71b02f8..f3f4e2f 100644
--- a/wiki/tech-patterns/_index.md
+++ b/wiki/tech-patterns/_index.md
@@ -3,7 +3,7 @@ title: "Tech Patterns Index"
 description: "Recurring technology stacks across Oliver Agency projects"
 tags: [index, tech-patterns]
 created: 2026-04-15
-updated: 2026-04-27
+updated: 2026-05-01
 ---
 
 # Tech Patterns
@@ -32,6 +32,9 @@ Recurring technology stacks used across Oliver Agency projects. Each article cov
 | [[wiki/tech-patterns/apache-spa-proxy-configuration-with-includes\|Apache SPA + API Proxy Configuration via Includes]] | When deploying a Single Page Application (SPA) alongside a backend API on the same Apache server, bu | — |
 | [[wiki/tech-patterns/azure-sso-pkce-browser-token-exchange\|Azure SSO with MSAL: Browser-Based Token Exchange Pattern]] | When implementing Single Page Application (SPA) authentication with Azure AD where the frontend hand | — |
 | [[wiki/tech-patterns/docker-volume-mounts-for-development-changes\|Docker Volume Mounts for Development: Avoiding Baked Code Issues]] | When deploying applications in Docker containers where code or configuration changes need to be refl | — |
+| [[wiki/tech-patterns/websocket-keepalive-terminal-close\|WebSocket Keepalive + Terminal Close Codes]] | Bidirectional 20s keepalive + terminal close codes (4001/4003/4004/4403) to prevent reconnect storms through Apache mod_proxy_wstunnel | video-accessibility, mod-comms |
+| [[wiki/tech-patterns/pydantic-empty-string-coercion\|Pydantic Empty String → None Coercion]] | field_validator with mode='before' to treat "" as absent optional field — prevents 400 on CC-only or AD-only payloads | video-accessibility |
+| [[wiki/tech-patterns/vtt-descriptive-transcript-regeneration\|VTT Edit → Descriptive Transcript Regeneration]] | Pattern for keeping descriptive_transcript.txt in sync when captions or AD VTTs are edited via PATCH /vtt | video-accessibility |
 
 ## Quick Decision Guide