Added AGENTS.md and skills

[arseny-kostenko]

Description

• Created AGENTS.md with workflow, architecture, state flow, middleware, React, styling, error-handling, and type-discipline rules.
• Added .opencode/skills for focused Ramda, RxJS/RTK, and Valkey guidance.

Change Visualization

NA

[alexey-temnikov]

".opencode/" - is a vendor specific path, it is better to use vendor neutral - ".agents/skills/"

Reference (see Step 1: Discover skills) : https://agentskills.io/client-implementation/adding-skills-support

[alexey-temnikov]

Skills need YAML frontmatter at the very top of the file

See - https://agentskills.io/specification#frontmatter
The SKILL.md file must contain YAML frontmatter followed by Markdown content.

[arseny-kostenko]

good catch

[alexey-temnikov]

Suggestion:
Minimize Agents.md to absolute minimum, as this is always appended to context, even when agent is working on non related task in this project. Instead - ensuring CONTRIBUTOR.md is accurate, and can be loaded by agent on demand as and if needed.