docs: refresh harness contributor commands

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

CONTRIBUTING.md

@@ -73,6 +73,9 @@ Minimum story recipe:
 - `Anatomy`: document stable slots and public `data-*` hooks
 - `Accessibility` or `Motion`: choose whichever behavior is easiest to misunderstand
 
+If a story becomes part of the curated browser review surface, add or update its entry in
+`tests/e2e/support/story-harness-contract.json` so smoke and a11y coverage stay aligned.
+
 Writing rules:
 
 - Use `docs.description.component` to explain when to choose the component.
@@ -117,6 +120,7 @@ Harness shortcuts:
 pnpm harness:select
 pnpm harness:validate:static
 pnpm harness:validate:changed
+pnpm harness:validate:a11y
 pnpm harness:validate:component
 pnpm harness:validate:docs
 pnpm harness:validate:consumers
@@ -135,6 +139,7 @@ Broader gates:
 ```bash
 pnpm harness:validate:pr
 pnpm harness:validate:release
+pnpm harness:orch -- doctor
 ```
 
 ## Practical repo guidance