chore: install openagent opencode

Signed-off-by: Dmytro Stanchiev <git@dmytros.dev>

.opencode/context/development/ai/mastra-ai/guides/testing.md

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+<!-- Context: development/testing | Priority: high | Version: 1.0 | Updated: 2026-02-15 -->
+
+# Guide: Testing Mastra
+
+**Purpose**: How to run and validate Mastra components in this project.
+
+**Last Updated**: 2026-01-09
+
+---
+
+## Core Idea
+Testing in this project is divided into tool-level tests and full workflow integration tests. Use the provided bun --bun scripts for rapid validation.
+
+## Key Points
+- **Tool Tests**: Validate individual tools in isolation (e.g., `bun --bun run test:playbook`).
+- **Workflow Tests**: Run full end-to-end scenarios (e.g., `bun --bun run test:workflow`).
+- **Baseline Tests**: Compare current performance against a known baseline (`bun --bun run test:baseline`).
+- **Observability**: Use `bun --bun run traces` after tests to inspect the execution details in the database.
+
+## Quick Example
+```bash
+# Test a specific tool
+bun --bun run test:calculator
+
+# Run full validity workflow
+bun --bun run validity:workflow
+
+# View results of the last run
+bun --bun run traces
+```
+
+**Reference**: `package.json` scripts, `scripts/` directory
+**Related**:
+- concepts/core.md
+- lookup/mastra-config.md