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08 · Agents · Evaluation

Multi-Model Memo Review

Plan independent model critiques of a memo while preserving disagreements.

modellgegenpruefungcross-eval

Alireza — Cross Eval · Original SKILL.md

---
name: "cross-eval"
description: "/cs:cross-eval <memo> — Multi-model consensus on a board memo or strategy brief. Claude + Codex + Gemini cross-review with graceful degradation. Use when a high-stakes memo needs an independent sanity check before the boardroom — e.g. a bet-the-company pivot or fundraise terms."
---

# /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 your vote (APPROVE / REJECT / DEFER). Do not deferentially agree — assume the memo's reasoning is flawed until proven otherwise."
4. Collect three independent reviews
5. Reconcile: where do they agree? Where do they diverge?
6. Surface the divergences as questions for the founder

## Output Format

Saved to `~/.claude/cross-eval/YYYY-MM-DD-<slug>.md`:

```markdown
# Cross-Eval: <memo title>
**Date:** YYYY-MM-DD
**Memo reviewed:** <link>
**Models invoked:** Claude / Codex / Gemini (or noted fallbacks)

## Vote Tally
| Model | Vote | Confidence |
|---|---|---|
| Claude | APPROVE | High |
| Codex | DEFER | Med |
| Gemini | APPROVE | Low |

## Consensus Concerns (≥2 models flagged)
1. <concern> — flagged by Claude + Codex
2. <concern> — flagged by all 3

## Divergent Concerns (1 model flagged)
- <Codex only:> <concern> — worth a second look
- <Gemini only:> <concern> — likely noise, but check

## Consensus Supports (≥2 models endorsed)
1. <support>
2. <support>

## Recommendation
- 🟢 GO if 2+ models APPROVE and no CRITICAL concerns from any model
- 🟡 PAUSE if any model is DEFER or any concern is CRITICAL
- 🔴 STOP if 2+ models REJECT

## Open Questions for Founder
1. <question raised by divergence>
2. <question raised by divergence>
```

## Why This Matters

Single-model recommendations have systematic biases. Claude trends helpful and may under-weight risk. Codex (OpenAI) trends more cautious on emerging-market and regulatory topics. Gemini trends more cautious on technical scale claims. Disagreement is signal, not noise.

This is the **safety net before irreversibility** — not a replacement for outside counsel or a real board.

## Graceful Degradation

If only Claude is available:

```markdown
**Models available:** Claude only
**Mode:** ADVERSARIAL — running 3 independent Claude passes with different system prompts:
  1. Standard reviewer
  2. Devil's advocate (must find 3 critical concerns)
  3. Steelman (must find 3 strongest reasons to approve)

This is weaker than true multi-model. Treat the result as suggestive, not conclusive.
```

## Routing

- `/cs:decide` — if consensus is GO
- `/cs:freeze` — if consensus is PAUSE
- `/cs:boardroom` (re-run) — if consensus is STOP

## Related

- Skills: [`board-meeting`](../../../c-level-advisor/skills/board-meeting/SKILL.md), [`executive-mentor`](../../../c-level-advisor/executive-mentor/)
- Inspiration: gstack's `/codex` cross-review pattern (adapted to business memos)

---

**Version:** 1.0.0

When to use

Plan independent model critiques of a memo while preserving disagreements.

What you get

The complete original guidance with attributed source and declared limitations.

How it works

Clarify the task and evidence, then apply relevant source instructions within authorized scope.

Requirements

Memo, confidentiality constraints, explicitly authorized providers and reviewer criteria.

Delivery and review notes

Brief source danger screening: full-text pattern triage and review of flagged passages, not a comprehensive audit or functional test. External model calls can disclose confidential memo content. Obtain explicit authorization for the specific providers and data before transfer; do not discover or expose secret values just because they may exist. No API keys are read, files written or models called on load. Agreement is not proof of truth; never invent the requested count of concerns or claim independent reviews that did not happen. Referenced scripts, templates, integrations and sibling skills are not supplied or installed unless explicitly listed as included. External calls, account changes, messages and file writes require the actual user task and authorization.

Starting prompt

Use Multi-Model Memo Review for [TASK]. Ask for missing inputs: Memo, confidentiality constraints, explicitly authorized providers and reviewer criteria. Identify assumptions and missing tools before execution; do not claim results or approvals without evidence.

Not for

Claiming runtime installation, certified safety, verified numerical outputs or permission for external actions merely from loading this source.

What M11 added

German routing, task scope and source limitations. Original author attribution: alirezarezvani (repository; source author not declared). Brief source danger screening: full-text pattern triage and review of flagged passages, not a comprehensive audit or functional test. External model calls can disclose confidential memo content. Obtain explicit authorization for the specific providers and data before transfer; do not discover or expose secret values just because they may exist. No API keys are read, files written or models called on load. Agreement is not proof of truth; never invent the requested count of concerns or claim independent reviews that did not happen. Referenced scripts, templates, integrations and sibling skills are not supplied or installed unless explicitly listed as included. External calls, account changes, messages and file writes require the actual user task and authorization.

Original authorship remains with alirezarezvani/claude-skills · Original source ↗

Original license & copyright

MIT License

Copyright (c) 2025 Alireza Rezvani

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Source SHA-256: bf2222d1c936e5e18acb634a92c7d17f73f44088784b85157fd6d81fd807004f
Snapshot checked: 2026-09-28T15:50:31.645Z

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