cross-evallisted
Install: claude install-skill timdevai/proteus
# /cs:cross-eval — Multi-Model Consensus
**Command:** `/cs:cross-eval <memo-or-brief>`
Runs the same memo through multiple model providers and reconciles divergences. Use for **high-stakes, irreversible decisions** where single-model bias is too costly: M&A, major fundraises, layoffs, strategic pivots, regulatory commitments.
Adapted from gstack's `/codex` cross-review pattern, generalized to **business memos** instead of code PRs.
## When to Run
- Before signing a term sheet
- Before announcing a layoff
- Before committing to a regulated market
- Before any decision where reversing costs > 6 months of company time
- When the boardroom vote was split or had a CRITICAL dissent
## Models Used (graceful degradation)
The command tries to invoke each available model in order:
1. **Claude** (primary, always available) — the boardroom's native voice
2. **Codex / OpenAI** (if `OPENAI_API_KEY` or `codex` CLI available)
3. **Gemini** (if `GEMINI_API_KEY` or `gemini` CLI available)
If only Claude is available, the command runs **Claude-only with adversarial mode** — same model, different prompt seeds — and clearly labels the output as single-model.
## Workflow
1. Read the memo / brief
2. Probe environment for available model CLIs / API keys
3. For each available model:
- Send the memo with this prompt prefix:
> "You are an independent C-suite reviewer. The following is a board memo from another company's boardroom. Identify the top 3 concerns, the top 3 supports, and