PR_SUBMISSION_TARGET_C.md

Fixes #241

Summary

Adds comprehensive unit tests covering AgentInstanceManager FIFO eviction semantics when maxInstances capacity is reached or exceeded.

• Verifies default maxInstances is 5,000 when option is omitted.
• Verifies eviction of the oldest instance when exceeding configured capacity (maxInstances: 2).
• Verifies strict FIFO preservation across multiple consecutive evictions (a, b, c -> b, c, d -> c, d, e -> d, e, f).
• Verifies accessing existing instances does not trigger eviction or increase instance size.
• Verifies single-entry sliding window behavior when maxInstances: 1.
• Verifies manual delete() and clear() operations adjust capacity correctly without premature FIFO eviction.
• Verifies re-adding an evicted agentId creates a fresh instance without retaining stale references.
• Verifies all instances are retained when count is below capacity limit.

Testing

• npm test: 55/55 test files passed (235/235 tests passed)
• npm run typecheck: clean (0 errors)
• npm run lint: clean (0 errors)