Add Cosmosmith multi-agent workflow rule

[devnomad-byte]

Adds a reusable Cursor Project Rule for multi-agent workflow governance.

The rule covers:

• AGENTS.md as the canonical project constitution
• task.md as the task ledger
• thin adapters for Claude Code, Cursor, Copilot, OpenCode, and Trae
• role handoffs across product, research, architecture, UI/UX, frontend, backend, QA, DevOps, and governance
• verification evidence before marking work done

Local checks run:

• node .\scripts\check-repo-hygiene.mjs --only rules passed
• node .\scripts\check-repo-hygiene.mjs --only readme passed
• node .\scripts\check-repo-hygiene.mjs --only security passed
• node .\scripts\check-awesome-list.mjs passed

Note: npm test was not used as the final validation on Windows because several existing tests resolve script paths as C:\D:\... / D:\D:\... and also assert LF-only workflow text. The focused repository checks above passed for this contribution.

Summary by CodeRabbit

• Documentation
  • Added a new entry to the build tools and development section for a multi-agent workflow guide.
  • Expanded the repository’s guidance for coordinating AI-assisted work across multiple roles and tools.
  • Included a clearer reference path for teams looking to follow the recommended workflow.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 40bb30bd-bef4-4557-a9c0-f200a290b1af

📥 Commits

Reviewing files that changed from the base of the PR and between b044f95 and d1c8df1.

📒 Files selected for processing (2)

• README.md
• rules/cosmosmith-multi-agent-workflow.mdc

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📝 Walkthrough

Walkthrough

A new Cursor rule file, cosmosmith-multi-agent-workflow.mdc, was added defining a multi-agent AI coding governance process, including canonical/adapter file precedence, task protocol, role responsibilities, and an initializer command. The README was updated with a corresponding link and description.

Changes

Cosmosmith Multi-Agent Workflow Rule

Layer / File(s)	Summary
Rule definition and README link rules/cosmosmith-multi-agent-workflow.mdc, README.md	New rule file defines front-matter, canonical/adapter precedence, task protocol using task.md, role mesh responsibilities, prompt/context/harness/loop guidance, large ledger handling, and an optional initializer command; README gains a linked bullet describing the rule.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: PatrickJS

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: adding a multi-agent workflow rule.
Description check	✅ Passed	The description covers the rule purpose, key behavior, and validation notes, so it is mostly complete despite missing template sections.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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