fix(status): show harnesses in agentcore status output

[jesseturner21]

Summary

• agentcore status now displays harness resources (deployed, local-only, pending-removal) in preview builds
• Adds harness diffing to computeResourceStatuses, gated behind __PREVIEW__ flag
• Adds harness icon to ResourceGraph TUI component
• Adds harness and dataset to telemetry FilterType enum

Test plan

• Unit tests pass (3 new harness tests + all 37 existing tests green)
• Verify agentcore status shows harnesses after deploying a harness in preview build
• Verify GA build does not show harness resources

[github-actions]

Package Tarball

aws-agentcore-0.15.0.tgz

How to install

gh release download pr-1396-tarball --repo aws/agentcore-cli --pattern "*.tgz" --dir /tmp/pr-tarball
npm install -g /tmp/pr-tarball/aws-agentcore-0.15.0.tgz

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-cli-automation]

Nice incremental change — the diffing logic is clean and the preview gating is consistent with how other preview features are wired.

The main thing I'd like to see addressed before merging is the test coverage gap around the __PREVIEW__ gate (see inline comment on the test file). The test plan has "Verify GA build does not show harness resources" as a manual step, but that could be an automated test cheaply, and would prevent accidental regressions of the gating.

A couple of small inline notes alongside that — feel free to take or leave.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	35.01%	10667 / 30463
🔵	Statements	34.36%	11329 / 32971
🔵	Functions	29.95%	1808 / 6036
🔵	Branches	29.01%	6737 / 23220

Generated in workflow #3331 for commit 8702812 by the Vitest Coverage Report Action

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[tejaskash]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

🤖 Generated with Claude Code

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