docs(readme): update readme

[jazz-cb]

Updating readme

Description

What changed and why?

Change type

• Harness integration or metadata
• Skill workflow
• Bug fix
• Documentation
• Breaking change (describe migration)

Validation

Describe native harness checks performed and explicitly list checks not run. Include screenshots or before/after behavior where useful; omit credentials and account data.

• Generated portable manifest and MCP config validate against the vendored Agent Plugins schemas
• Package paths and skill references remain inside each generated plugin root
• Marketplace, skills, MCP, and icon paths are valid
• Exactly one canonical skill library; generated copies are not committed
• Claude compatibility metadata/endpoint and marketplace sources agree with the portable package
• Tool schemas, authorization, and retry behavior reviewed
• README and changelog updated; versions consistent
• No unapproved disclosures or sensitive data
• Signed commits

Release considerations

List outstanding approvals, client-support limits, and rollout steps. Validation does not authorize public publication.

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 1/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1