huskies: done 494_story_mcp_tool_to_run_project_test_suite

.huskies/work/5_done/494_story_mcp_tool_to_run_project_test_suite.md

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+---
+name: "MCP tool to run project test suite"
+---
+
+# Story 494: MCP tool to run project test suite
+
+## User Story
+
+As an LLM agent or web UI user, I want an MCP tool that runs the project's test suite so I can verify code changes without shelling out to Bash.
+
+## Acceptance Criteria
+
+- [ ] New MCP tool `run_tests` that executes `script/test` and returns pass/fail with output
+- [ ] Available as a bot command (`test`) in all chat transports
+- [ ] Available as a slash command (`/test`) in the web UI
+- [ ] Returns structured result: pass/fail, test count, and truncated output for failures
+- [ ] Runs in the project root (or optionally in a specified worktree path)
+
+## Out of Scope
+
+- TBD