fix(credentials): make Claude Platform API keys available in the provider catalog

[TheodoreSpeaks]

Summary

• Claude Platform API key credentials were reported available: false for every viewer, so the provider catalog refused to create them before any Anthropic call
• Cause: service-account visibility needs the credential's service linked to an integration block, but that map is built only from OAuth integrations — the managed_agent block is api-key auth, so claude-platform mapped to no block
• Link claude-platform → managed_agent through the existing token-credential map (same path Coda uses), so the block's allowlist, kill switch, and preview gating still govern the credential

Type of Change

• Bug fix

Testing

• credential-visibility.server.test.ts: Coda case parameterized over Claude Platform, driven by the real availability catalog (visible by default, hidden by allowlist / kill switch / preview)
• credential-display.test.ts: coverage table now expects claude-managed-agents for the Claude Platform credential
• lib/integrations, lib/credentials, lib/oauth, managed-agent, and credential tool tests pass; bun run lint, block-registry check, check:audits, docs-manifest:check 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)

🤖 Generated with Claude Code

https://claude.ai/code/session_01WsJr8v3nVcg4RYbdARkcrn

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Oct 2, 2026 11:11pm UTC

[cubic-dev-ai]

No issues found across 3 files

Confidence score: 5/5

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

_{Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

[Medium risk] Adds Claude Platform API keys to the integration catalog.

The PR appears safe to merge; no actionable issue was identified.

Summary

The PR maps Claude Platform token credentials to the Managed Agent integration so the credential-provider catalog can offer them. It also updates display-coverage expectations and adds visibility-policy regression coverage.

_{Reviews (1) · Last reviewed commit: "fix(credentials): make Claude Platform A..."}