feat(mcp): add repository list/add/rename/remove tools

[Ankitsinghsisodya]

Changes

• Add repository_list MCP tool to list installed template repositories
• Add repository_add MCP tool to install a repository by name and URL
• Add repository_rename MCP tool to rename an installed repository
• Add repository_remove MCP tool to remove an installed repository from local disk
• Register all four tools and their help resources in the MCP server
• Add full test coverage for happy path, readonly guards, and error propagation

/kind enhancement

---

Summary

This PR exposes func repository subcommands as MCP tools, closing the gap between the CLI surface and the MCP tool surface for template repository management.

Previously, an agent could call create with a --repository flag pointing to a remote URL, but had no way to persistently install, list, rename, or remove template repositories. With these tools, an agent can now manage the full lifecycle of local template repositories before scaffolding new functions.

Tools Added

Implemented in pkg/mcp/tools_repository.go:

Tool	CLI equivalent	Readonly safe
repository_list	func repository list	Yes
repository_add	func repository add <name> <url>	No — blocked in readonly mode
repository_rename	func repository rename <old> <new>	No — blocked in readonly mode
repository_remove	func repository remove <name>	No — blocked in readonly mode

All write tools (add, rename, remove) return an error when the server is in readonly mode (i.e. FUNC_ENABLE_MCP_WRITE is not set), consistent with delete and deploy.

Tests

Added pkg/mcp/tools_repository_test.go with 11 test cases:

• Happy path for each tool (subcommand and positional args verified)
• --verbose flag is forwarded when set
• Readonly guard correctly blocks add, rename, remove
• Executor errors are propagated as MCP error results for all tools

go test -v ./pkg/mcp/...

All existing tests continue to pass.

---

Release Note

Added MCP tools `repository_list`, `repository_add`, `repository_rename`, and `repository_remove` to manage installed template repositories from an agent context.

[knative-prow]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.21%. Comparing base (2bbf9fe) to head (eeb129c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3766      +/-   ##
==========================================
+ Coverage   57.06%   57.21%   +0.14%     
==========================================
  Files         181      182       +1     
  Lines       21145    21214      +69     
==========================================
+ Hits        12067    12138      +71     
+ Misses       7855     7853       -2     
  Partials     1223     1223              

Flag	Coverage Δ
e2e	35.81% <0.00%> (-0.11%)	⬇️
e2e go	31.33% <0.00%> (-0.13%)	⬇️
e2e node	27.13% <0.00%> (-0.12%)	⬇️
e2e python	31.70% <0.00%> (-0.13%)	⬇️
e2e quarkus	27.25% <0.00%> (-0.12%)	⬇️
e2e rust	26.66% <0.00%> (-0.11%)	⬇️
e2e springboot	25.18% <0.00%> (-0.11%)	⬇️
e2e typescript	27.24% <0.00%> (-0.12%)	⬇️
e2e-config-ci	28.18% <0.00%> (-0.12%)	⬇️
integration	17.28% <0.00%> (-0.10%)	⬇️
unit macos-14	45.26% <100.00%> (+0.20%)	⬆️
unit macos-latest	45.26% <100.00%> (+0.20%)	⬆️
unit ubuntu-24.04-arm	45.49% <100.00%> (+0.17%)	⬆️
unit ubuntu-latest	46.21% <100.00%> (+0.20%)	⬆️
unit windows-latest	45.30% <100.00%> (+0.20%)	⬆️

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