fix(cloudwatch): paginate log selectors

[BillLeoutsakosvl346]

Summary

• expose the final AWS CloudWatch nextToken from the existing bounded log-group and log-stream listing helpers
• make both CloudWatch selectors cursor-backed while retaining their current 20-request aggregation window
• preserve runtime tool and route output contracts, prefix/detail behavior, server-only credentials, context binding, and abort propagation

No linked issue.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation
• Other

Testing

• bun run --cwd apps/sim test -- tools/cloudwatch/listing.test.ts lib/selectors/server/providers/cloudwatch.test.ts lib/selectors/manifest.test.ts lib/internal/cloudwatch/operations.test.ts lib/internal/cloudwatch/execute-tool.test.ts
• bun run --cwd apps/sim type-check
• bun run --cwd apps/sim lint:check
• bun run check
• bun run check:api-validation

Focused tests cover opaque cursor input/output through page 20, stream log-group and prefix binding, selector cursor mapping, and paginated manifests. Existing runtime operation and executor contract tests pass unchanged.

Live high-cardinality AWS validation was not run because this environment has no AWS credentials or region configured.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement

Screenshots/Videos

Not applicable; no UI changes.

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 1, 2026 6:33pm UTC

[cubic-dev-ai]

No issues found across 7 files

Confidence score: 5/5

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

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[greptile-apps]

Greptile Summary

The PR adds cursor-backed pagination to the CloudWatch log-group and log-stream selectors while retaining the existing 20-request aggregation window.

• Threads opaque AWS continuation tokens through the shared CloudWatch listing helpers.
• Declares both CloudWatch selectors paginated and maps selector cursors to AWS tokens.
• Adds focused coverage for continuation tokens, selector context binding, and manifest configuration.

Confidence Score: 5/5

The PR appears safe to merge; no concrete blocking or independently actionable non-blocking issue was identified.

The cursor remains bound to stable search and log-group context across pagination, the returned token points to the next unconsumed provider page, and the existing request bound, credentials handling, abort propagation, and cleanup behavior remain intact.

Important Files Changed

Filename	Overview
apps/sim/lib/internal/cloudwatch/client.ts	Extends bounded log-stream enumeration to accept and return an opaque continuation token without changing ordering, filtering, abort handling, or request limits.
apps/sim/tools/cloudwatch/listing.ts	Propagates continuation tokens through shared log-group and log-stream listing results while retaining client cleanup and the 20-page bound.
apps/sim/lib/selectors/server/providers/cloudwatch.ts	Maps selector cursors to CloudWatch tokens and returns the final provider token as the next selector cursor.
apps/sim/lib/selectors/manifest.ts	Marks both CloudWatch resource selectors as paginated.
apps/sim/tools/cloudwatch/listing.test.ts	Covers opaque input tokens and continuation after the twentieth aggregated provider page.

Sequence Diagram

sequenceDiagram
  participant UI as CloudWatch selector
  participant Adapter as Selector adapter
  participant Listing as Bounded listing helper
  participant AWS as AWS CloudWatch Logs
  UI->>Adapter: list(search, cursor?)
  Adapter->>Listing: prefix + nextToken
  loop Up to 20 requests
    Listing->>AWS: Describe request(nextToken)
    AWS-->>Listing: items + nextToken?
  end
  Listing-->>Adapter: aggregated items + final nextToken?
  Adapter-->>UI: items + nextCursor?
  opt More results
    UI->>Adapter: list(search, nextCursor)
  end

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