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src/__Libraries/__Tests/StellaOps.Metrics.Tests/AGENTS.md

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+# Metrics Tests Agent Charter
+
+## Mission
+- Validate KPI models, collector logic, and trend calculations for metrics.
+
+## Responsibilities
+- Keep tests deterministic and independent of local time zones.
+- Avoid nondeterministic IDs or timestamps in assertions.
+
+## Required Reading
+- docs/07_HIGH_LEVEL_ARCHITECTURE.md
+- docs/modules/platform/architecture-overview.md
+
+## Working Directory & Scope
+- Primary: src/__Libraries/__Tests/StellaOps.Metrics.Tests
+- Allowed shared projects: src/__Libraries/StellaOps.Metrics
+
+## Testing Expectations
+- Cover KPI trend calculations and label normalization.
+- Use fixed timestamps and deterministic inputs.
+
+## Working Agreement
+- Update sprint status in docs/implplan/SPRINT_*.md and local TASKS.md.
+- Keep outputs deterministic and avoid non-ASCII logs.