Add coding agent integration skills

[Stephen Belanger (Qard)]

Summary

• add a small orchestration skill for complete coding-agent integrations
• add focused skills for translator, capture, setup, managed run, import, testing, and shipping work
• document skill routing and shared integration invariants in AGENTS.md

Why

A single comprehensive skill loaded too much context for focused tasks. Splitting the requirements into independently triggered skills lets their YAML descriptions select only the relevant instructions, while the orchestration skill still covers end-to-end integrations and delegates each workstream explicitly.

Impact

Agents can now use a targeted skill for one integration layer or the coordinator for a complete new coding-agent integration. The component skills stay implementation-agnostic and require the consuming agent to discover current repository seams from source.

Validation

• validated all eight skills with the official skill validator
• validated every agents/openai.yaml, including prompt references and description lengths
• verified coordinator references resolve to existing component skills
• checked for stale placeholders and removed aggregate-reference names
• ran git diff --check