feat: expose ElastiCache resources to automation - #365
YoungJinJung wants to merge 2 commits into
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- add a read-only JSON resource command and MCP tool - preserve joined replication-group and node details in a stable contract - document permissions and cover CLI, MCP, and repository behavior
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🔇 Additional comments (2)
WalkthroughChangesElastiCache resource discovery
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant MCP Client
participant list_elasticache_resources
participant resources elasticache-resources
participant AwsRepository
MCP Client->>list_elasticache_resources: provide AWS profile and region
list_elasticache_resources->>resources elasticache-resources: invoke JSON resource command
resources elasticache-resources->>AwsRepository: list ElastiCache resources
AwsRepository-->>resources elasticache-resources: return resources with nodes and region
resources elasticache-resources-->>MCP Client: return versioned JSON output
Suggested reviewers: Merge Risk: 🔵 Low · up to The new interfaces work is documented incompletely, which may make the feature harder to discover but does not block normal operation. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 13 functions across 9 files. (1 skipped: 1 unsupported.)
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This PR cleanly exposes ElastiCache resources to the automation layer. The implementation follows established patterns, includes proper test coverage, and maintains consistency across CLI commands, MCP tools, and documentation. The code correctly handles resource enumeration, node arrays, and error cases. No blocking issues found.
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Actionable comments posted: 1
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Inline comments:
In `@README.md`:
- Line 163: Add a separate implemented-features entry under Current Features for
elasticache-resources, representing the ElastiCache resource-discovery CLI query
and corresponding MCP tool; keep the existing ElastiCache Cluster & Replication
Group Browser entry unchanged.
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📒 Files selected for processing (11)
README.mddocs/development.mdinternal/cli/resources.gointernal/cli/resources_operations.gointernal/cli/resources_operations_test.gointernal/mcp/agent_surface_test.gointernal/mcp/server.gointernal/mcp/server_test.gointernal/services/aws/elasticache.gointernal/services/aws/elasticache_model.gointernal/services/aws/elasticache_test.go
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For AWS integration code, focus on SDK client interface mockability, paginator usage, nil/empty response handling, AWS pointer conversion, stable list ordering, and user-facing error messages.
⚙️ CodeRabbit configuration file
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internal/services/aws/elasticache.gointernal/services/aws/elasticache_test.gointernal/services/aws/elasticache_model.go
Check that tests cover API errors, mapping edge cases, and navigation state transitions, not only happy paths.
⚙️ CodeRabbit configuration file
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internal/services/aws/elasticache_test.gointernal/mcp/agent_surface_test.gointernal/mcp/server_test.gointernal/cli/resources_operations_test.go
Verify that README changes match actual CLI/TUI behavior and that Currently Implemented Features, TUI Key Bindings, Usage, and Configuration content stay aligned with code changes.
⚙️ CodeRabbit configuration file
Files:
README.md
Documentation must match implemented behavior.
⚙️ CodeRabbit configuration file
Files:
docs/development.md
For Go reviews, look beyond compilation and prioritize nil pointer risks, context propagation, AWS SDK pagination, error wrapping, deterministic sorting, and stable table/detail rendering.
⚙️ CodeRabbit configuration file
Files:
internal/services/aws/elasticache.gointernal/services/aws/elasticache_test.gointernal/cli/resources.gointernal/mcp/agent_surface_test.gointernal/mcp/server_test.gointernal/cli/resources_operations_test.gointernal/services/aws/elasticache_model.gointernal/cli/resources_operations.gointernal/mcp/server.go
Tests use mock client interfaces (see `rds_test.go` pattern) in Go test files
📄 CodeRabbit inference engine (CLAUDE.md)
Files:
internal/services/aws/elasticache_test.gointernal/mcp/agent_surface_test.gointernal/mcp/server_test.gointernal/cli/resources_operations_test.go
When adding, modifying, or deleting features, always update `README.md` in parallel with code changes Update `Currently Implemented Features` table in README.md: add new services/features, update status changes (🚧→✅), remove deleted items...
📄 CodeRabbit inference engine (CLAUDE.md)
Files:
README.md
Use lipgloss for styled TUI output — column-aligned tables with dimmed labels in Go implementation files Implement scroll windowing with formula: `visibleLines := max(m.height-N, 5)` in Go TUI implementation
📄 CodeRabbit inference engine (CLAUDE.md)
Files:
internal/services/aws/elasticache.gointernal/services/aws/elasticache_test.gointernal/cli/resources.gointernal/mcp/agent_surface_test.gointernal/mcp/server_test.gointernal/cli/resources_operations_test.gointernal/services/aws/elasticache_model.gointernal/cli/resources_operations.gointernal/mcp/server.go
🔇 Additional comments (6)
internal/cli/resources.go (1)
61-61: LGTM!internal/cli/resources_operations.go (1)
45-51: LGTM!Also applies to: 126-140
internal/cli/resources_operations_test.go (1)
7-7: LGTM!Also applies to: 42-81, 83-96
internal/mcp/server.go (1)
123-131: LGTM!Also applies to: 417-425
internal/mcp/server_test.go (1)
58-58: LGTM!internal/mcp/agent_surface_test.go (1)
30-30: LGTM!
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Reviewed head 16ca7244123afa1078f6de2e4d9a6767930871ff. I read the complete 11-file diff, tests, CI, prior reviews, comments, and the current unresolved thread; no actionable correctness concerns remain. The README already documents elasticache-resources in the automation query list, while the separate feature table consistently catalogs TUI service features, so a duplicate feature-table row is not warranted. Local validation passed: make test, make build, and git diff --check origin/main...origin/feature/issue-360-elasticache-agent-surface.
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Findings
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Medium — keep the MCP tool inventory truthful (README.md:253)
This paragraph says “The server provides” and then gives an exhaustive tool list, but the new list_elasticache_resources tool is absent (as are several resource tools already registered in server.go). Users reading the MCP setup section therefore cannot discover the new behavior from the documented inventory. Replace the exhaustive list with durable wording such as “the read-only resource operations listed above, including list_elasticache_resources, plus capability discovery, Security Inspector, and context-sync preview tools,” and add an ElastiCache example prompt if useful. This is separate from the existing Current Features table comment.
Reviewed head: 16ca724
- Replace the stale exhaustive tool list with durable wording.\n- Call out the ElastiCache MCP resource operation explicitly.
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The implementation correctly adds ElastiCache resource discovery following established patterns. The code properly handles empty array initialization for stable JSON output, includes region metadata, and provides comprehensive test coverage. No blocking issues identified.
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Re-reviewed head a0b241b after the MCP inventory follow-up. The new wording resolves the prior documentation finding and matches the current tool registry. I read the complete 11-file diff, tests, CI, prior reviews, and discussion; no further actionable concerns remain. Local validation passed: make test, make build, and git diff --check origin/main...HEAD.
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Reviewed head a0b241b. I read the complete 11-file diff, tests, CI, prior reviews, comments, and thread state. The CLI reuses the existing paginated ElastiCache repository view, emits stable region and node data, and the MCP mapping, permissions, parity guard, and documentation are aligned. No actionable concerns remain. Local validation passed: make test, make build, focused uncached tests, schema inspection, and git diff --check.
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Summary\n\n- add the read-only unic resources elasticache-resources --json command using the existing joined ElastiCache browser model\n- expose the same contract as the list_elasticache_resources MCP tool with strict AWS context input and required IAM permissions\n- preserve deterministic resource and node ordering, stable empty arrays, and region metadata\n- update agent-surface parity coverage and user/developer documentation\n\n### Related Issues\n\nPart of #360\n\n### Validation\n\n- make test\n- make build\n- git diff --check origin/main...HEAD\n- ./unic schema resources elasticache-resources --json\n\n### Checklist\n\n- [x] Scope is focused\n- [x] Branch name follows docs/branch-naming-harness.md\n- [x] Documentation harness reviewed (docs/documentation-harness.md)\n- [x] README updated if user-facing behavior changed\n- [x] Relevant docs updated if architecture, auth, config, or workflow changed\n- [x] Tests and validation included\n- [x] No breaking changes
Summary by CodeRabbit
New Features
list_elasticache_resourcestool.Documentation