feat(oh-my-zcode-slim): add OMOS-style agent orchestration suite

[MartijnDekkers]

What user problem does this solve?

ZCode users who want the oh-my-opencode-slim orchestration pattern — specialist delegation with a routing table, background-task discipline, and a multi-model council — currently have to hand-build it. This plugin packages the port: 7 specialist agents, 6 workflow skills, 2 commands, an installable orchestrator doctrine, and scripts that configure council seats and MCP wiring per machine.

Visible behavior and how it was tested

After install + install-doctrine.sh + council-seat generation + session restart: the session agent routes work per the doctrine (recon → @explorer, bounded implementation → @coder, UI → @designer, escalation → @oracle); /deepwork and /reflect appear in the command menu; council questions dispatch every configured councillor-* seat in parallel and the council agent synthesizes a structured consensus report.

Tested end-to-end on a real installation (ZCode desktop attached to a remote Linux host): full-roster spawn ping (all 7 agents), seat generation across three different model providers and a live multi-model council dispatch, skill routing, and MCP wiring via enable-mcp.sh. Reproducible steps are the "Smoke tests" section of both READMEs.

Version changes and marketplace registration

New plugin oh-my-zcode-slim v0.2.0, registered in marketplace.json (category: developer-tools) with bilingual descriptions matching the manifest. 0.2.0 matches the tagged release of the source repository.

Dependencies, network requests, permissions, and side effects

• Network: none initiated by the plugin. The librarian agent uses web search/fetch when dispatched. No API keys shipped or required.
• Models: default pins use the builtin z.ai coding-plan provider available to authenticated sessions; council seats use user-configured models.
• File writes: coder/designer agents within delegated scope; install-doctrine.sh → ~/.zcode/AGENTS.md (with backup); scripts → ~/.zcode/agents/ (or project .zcode/agents/ with --workspace); worktrees/clonedeps skills → project .slim/ when invoked.
• Command execution: within per-agent tool allowlists; scripts are plain bash over git/sqlite3/jq.
• Hooks / MCP servers: none included.
• Full disclosure section in both READMEs ("Side effects, permissions, and dependencies").

Licensing / provenance

Prompts, doctrine, and skills are adapted from oh-my-opencode-slim by @alvinunreal (MIT), credited in the READMEs; LICENSE carries the upstream notice plus this port's. ZCode-specific packaging, scripts, and porting notes are original to this plugin.

Contribution checklist

• plugin name is unique and kebab-case
• required files and both language READMEs are present
• category is correct (developer-tools)
• no secrets, private data, or machine-specific paths (audited; machine-specific provider ids appear only as documented placeholders)
• validate.py, build_dist.py, and git diff --check pass
• review feedback addressed on this pull request