Support for oh-my-pi coding agent

[muneale]

Summary

Registers the Oh My Pi (oh-my-pi) agent adapter to configure MCP servers under .omp/mcp.json. Also registers the client ID omp-coding-agent to automatically negotiate the GCX1 wire format. Includes unit testing, integration smoke tests, and global installation mode (ModeGlobal / gortex install) skip logic to prevent project-scoped file writes.

Changes

• Adapter: Added internal/agents/ohmypi/adapter.go and internal/agents/ohmypi/adapter_test.go.
• Format Negotiation: Added omp-coding-agent format negotiation in internal/mcp/server.go and updated test coverage in internal/mcp/format_negotiation_test.go.
• CLI Commands: Registered the adapter in the CLI and wizard via cmd/gortex/init.go and cmd/gortex/init_wizard.go.
• Smoke Tests: Added smoke testing integration in .github/workflows/init-smoke.yml.
• Docs: Updated docs/agents.md.

Testing

• All tests pass (go test -race ./...)
• New tests added for new functionality
• Benchmarks run if performance-relevant

Checklist

• Code follows existing patterns in the codebase
• No unnecessary abstractions added
• Language extractor includes Meta["methods"] for interfaces (if applicable)
• Methods have EdgeMemberOf edges to their containing type (if applicable)

[zzet]

Thanks for this! CI was red because a new adapter must ship its agent-render drift-fence golden (TestAgentsRenderGolden → missing cmd/gortex/testdata/agent-render/oh-my-pi.txt), which also failed the full test matrix.

I've rebased your two commits onto current main and completed the integration in #130: added the render golden, fixed the adapter count in docs/agents.md (now seventeen), and sorted the ohmypi import. Your commits are preserved with authorship. #130 is green and mergeable, so this can land via that PR.