[waleedlatif1]

Summary

• Create Opportunity and Update Opportunity now reject stage and stageId together. Monaco's spec documents stage_id as a replacement for stage on both create and update ("Stage ID ..., instead of stage"), and gives no meaning to sending both, so the request was ambiguous.
• The check lives in the shared buildMonacoOpportunityWriteBody, so both tools get it. It reads the already-trimmed body, so a blank stage key next to a stage ID is still allowed. The wording matches the existing "Provide either X or Y, not both" checks.
• Both stageId param descriptions now say to provide one or the other.
• Addresses the cubic finding on release PR v0.9.57: cua improvements, Monaco CRM integration, Hex and Stripe validation, keyless subjects held until trust policies apply, AWS Marketplace replica entitlement check, Slack channel search #10017.

Type of Change

• Bug fix

Testing

• New case in tools/monaco/write_bodies.test.ts. It fails with the check removed and passes with it in place.
• write_bodies.test.ts and blocks/blocks/monaco.test.ts pass.
• check:tool-metadata, check:docs, check:utils, check:integration-catalog, check:tool-param-reachability and check-block-registry.ts origin/staging pass.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

[vercel]

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Nov 13, 2026 10:50pm UTC

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Turn on auto-fix | Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge.

Summary

Opportunity writes now reject a nonblank stage and stageId together.

• Opportunity writes reject requests that name a stage two ways.

No actionable issues found. Tests were not run during this review.

_{Reviews (1) · Last reviewed commit: "fix(monaco): reject a stage key and a st..." · Reviewed by Greptile}