In the Jain Agamas, there is no single Agam that gives a fully systematic, detailed explanation of both samyaktva and gunasthana together.

• Samyaktva is discussed in several Agamas, especially the Bhagavati Sutra (Vyakhya Prajnapti) and Uttaradhyayana Sutra.
• Gunasthana is not explained in a complete systematic form in the Agamas; its detailed classification is mainly found in later Jain philosophical texts, especially Tattvartha Sutra, Karmagranthas, and Gommatsara.

So, if you are looking for:

• Detailed samyaktva discussion → Bhagavati Sutra
• Detailed gunasthana explanation → later texts, not a core Agam

If you want, I can also give the exact names of Agamas where samyaktva is mentioned in a simple list.