How do I harden the NSIS stubs in such a way that I don't lose system.dll feature.

GPT-5.4 (changed mind)

Vote: Yes

Yes is the stronger final answer. The other models made the key distinction my earlier vote missed: not all hardening is the same. Basic PE-level mitigations such as ASLR and DEP/NX can be applied to NSIS stubs without inherently breaking system.dll. That matters because the question asks whether you can harden the stubs and still keep system.dll, not whether every possible mitigation is compatible. If some meaningful hardening remains compatible, the correct binary choice is Yes. The limiting case is stricter mitigations that block dynamic code or similar behavior. Those can interfere with system.dll. But that only shows there is a boundary, not that hardening is impossible. So the best final characterization is: yes, you can harden NSIS stubs in compatible ways, though not with every conceivable mitigation.

Gemini 3.1 Pro

Vote: Yes

I am maintaining my vote for 'Yes' because standard hardening (ASLR, DEP/NX) is entirely possible without breaking system.dll. As Kimi K2.5 accurately points out, the system.dll plugin relies on dynamically loading and calling Windows APIs, which is compatible with DEP/NX as long as memory is allocated with the correct execution permissions (e.g., PAGE_EXECUTE_READWRITE), which the plugin handles. While GPT-5.4 correctly notes that stricter mitigations like Arbitrary Code Guard (ACG) will break system.dll's ability to generate dynamic thunks, 'hardening' is not an all-or-nothing toggle that demands ACG. Applying standard PE header protections (ASLR, High Entropy VA, DEP) constitutes hardening and leaves system.dll fully functional. Therefore, 'Yes'—it is possible to harden the stubs without losing this feature—remains the most accurate response to the premise of the question.

Kimi K2.5

Vote: Yes

Standard PE hardening techniques—specifically ASLR (/DYNAMICBASE) and DEP/NXCOMPAT—are fully compatible with system.dll functionality. These flags modify loader behavior and memory protection policies without prohibiting legitimate dynamic code generation. The system.dll plugin explicitly allocates executable memory pages using VirtualProtect, which operates correctly under standard DEP; it does not rely on executing data pages or other patterns that basic hardening blocks. The argument for 'No' overgeneralizes by conflating basic mitigations with extreme controls like Arbitrary Code Guard (ACG) or strict Control Flow Guard (CFG), which indeed prevent runtime code generation. However, the question context implies standard installer hardening, not kernel-level exploit mitigations. Since NSIS 3.0+ explicitly supports hardened stubs via linker flags or post-build editbin, and system.dll continues to function normally, the capability is definitively 'Yes'—with the reasonable scope of standard Windows hardening features. Gemini's clarification reinforces this distinction: standard hardening is safe; only strict dynamic-code prohibitions are incompatible. This nuance confirms that the correct answer affirms feasibility under normal hardening regimes.

Final Summary

The AI Roundtable initially split when GPT-5.4 argued that security hardening is fundamentally incompatible with the dynamic nature of the system.dll plugin. However, Kimi K2.5 and Gemini 3.1 Pro clarified that standard protections like ASLR and DEP function perfectly well with modern NSIS stubs, swaying GPT-5.4 to join the unanimous consensus for 'Yes.'

All 3 models agreed on "Yes" after discussion

Strongest Arguments

• Yes: Standard Windows mitigations like ASLR and DEP/NX apply to memory layout and execution policies without prohibiting the specific dynamic loading patterns used by system.dll, provided extreme guards like ACG are avoided.
• No: Hardening stubs restricts the very flexibility required for low-level dynamic calls, creating a zero-sum trade-off between security and plugin functionality.

Key Turning Points

• Gemini 3.1 Pro and Kimi K2.5 established the distinction between standard PE-header hardening (ASLR/DEP) and extreme mitigations (ACG/Arbitrary Code Guard).
• GPT-5.4 conceded that if meaningful hardening exists that doesn't break plugins, the answer must be affirmative.