Add b2c-vs-extension to AGENTS.md package list and valid changesets

Author: clavery

AGENTS.md

@@ -4,6 +4,7 @@ This is a monorepo project with the following packages:
 - `./packages/b2c-cli` - the command line interface built with oclif
 - `./packages/b2c-tooling-sdk` - the SDK/library for B2C Commerce operations; supports the CLI and can be used standalone
 - `./packages/b2c-dx-mcp` - Model Context Protocol server; also built with oclif
+- `./packages/b2c-vs-extension` - VS Code extension (not published to npm; packaged as VSIX and versioned via git tags)
 - `./docs` - documentation site (private `@salesforce/b2c-dx-docs` workspace package; not published to npm)
 
 ## Common Commands
@@ -182,7 +183,7 @@ Changeset guidelines:
   - HOW a consumer should update their code
 - Good changesets are brief and user-focused (not contributor); they are generally 1 line or two; The content of the changeset is used in CHANGELOG and release notes. You do not need to list internal implementation details or all details of commands; just the high level summary for users.
 
-Valid changeset packages: `@salesforce/b2c-cli`, `@salesforce/b2c-tooling-sdk`, `@salesforce/b2c-dx-mcp`, `@salesforce/b2c-dx-docs`
+Valid changeset packages: `@salesforce/b2c-cli`, `@salesforce/b2c-tooling-sdk`, `@salesforce/b2c-dx-mcp`, `b2c-vs-extension`, `@salesforce/b2c-dx-docs`
 
 Create a changeset file directly in `.changeset/` with a unique filename (e.g., `descriptive-change-name.md`):