feat(cli): add consistent JSON output to project mutations

[notgitika]

Uses the existing global JsonKey / JsonRendererKey path with a shared project mutation envelope for create, add, and remove. All project add leaves now use one runWithProgress wrapper, and nested help shows inherited global options.

Human-readable output remains unchanged.

[agentcore-devx-automation]

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

[agentcore-devx-automation]

AgentCore Harness Review

Verdict: Looks good

Nice, well-scoped refactor. The new ProjectMutationResult contract via src/handlers/project/output.ts is consistent across create, add *, and remove *, and the addProjectResource helper in src/handlers/project/add/shared.ts cleanly collapses the duplicated for await loops. A few small observations, none blocking:

• parentFor in add/shared.ts and the ternary chain in remove/index.ts (lines 135–142) encode the same parent-relationship knowledge in two places. If a third resource ever gains a parent, both must be updated. Consider extracting a single parentFor(resourceType, flags) helper shared by both sides — optional cleanup, not required now.
• addProjectResource hard-codes interactive: false for runWithProgress. That preserves byte-for-byte behavior of the previous for await loop, which is what the comment says is intended, so this is fine — just worth noting if you later want add commands to get the same live TaskList UI as create/deploy.
• remove always emits removedEnvironmentKeys (including [] when nothing was removed), while add/create never emit it. The contract is unambiguous, but you may want to document that shape somewhere consumer-facing (schema/docs) so tools can rely on it.

The tests use real temp-dir projects and go through run(...) end-to-end — no excessive mocking. The router showGlobalOptions: true change is small, covered by a new test, and orthogonal but reasonable to bundle here.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.05%. Comparing base (da28031) to head (775a74a).

Additional details and impacted files

@@             Coverage Diff              @@
##           refactor    #2218      +/-   ##
============================================
+ Coverage     97.04%   97.05%   +0.01%     
============================================
  Files           544      546       +2     
  Lines         37536    37669     +133     
============================================
+ Hits          36428    36561     +133     
  Misses         1108     1108              

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[agentcore-devx-automation]

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