Reminds me of the recent paper about delegating document editing tasks to LLMs across different disciplines [1]. That paper found that programming was the only discipline most LLMs can perform long horizon tasks on without accumulating errors & corrupting the document. I've only read the abstract of this one so far but it seems like this paper has zoomed in on programming with greater fidelity and shown a similar phe…
Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
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Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#12Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#13These things don’t think. We’re going to have to reiterate this for a long time, I fear.
…but they reason well enough given enough context (using their matmuls).
Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#14Also they used languages with dynamic typing like Python & JS. In my experience a statically typed codebase is easier to maintain for humans so maybe it is also for agents. When using Codex/Claude Code with Go code I cannot count the times the agent does some change, runs a build to check for errors, find some and fix them.
Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#15I have exactly the inverse findings on my end. The bigger and more legacy the codebase, the more accurate the patches become.
The harness itself seems to be the most important part. I use a recursive loop that primes the root context based on the user prompt each time. My agent will often make over 100 tool calls to sql and git before it finally decides to apply a patch. If I was greenfield, there would be nothing to query or constrain against.
Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#16Also they used languages with dynamic typing like Python & JS. In my experience a statically typed codebase is easier to maintain for humans so maybe it is also for agents. When using Codex/Claude Code with Go code I cannot count the times the agent does some change, runs a build to check for errors, find some and fix them.
It's crazy to me that people think of Python as dynamically typed by default. Strong static typing has been an option in Python for years now, and it should just be the default.
Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#17Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#18Reminds me of the recent paper about delegating document editing tasks to LLMs across different disciplines [1]. That paper found that programming was the only discipline most LLMs can perform long horizon tasks on without accumulating errors & corrupting the document. I've only read the abstract of this one so far but it seems like this paper has zoomed in on programming with greater fidelity and shown a similar phe…
If it’s not easily verifiable, LLMs aren’t good at it.
Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#19> Our findings reveal a phenomenon of constraint decay: as structural requirements accumulate, agent performance exhibits a substantial decline. I have exactly the inverse findings on my end. The bigger and more legacy the codebase, the more accurate the patches become. The harness itself seems to be the most important part. I use a recursive loop that primes the root context based on the user prompt each time. My ag…
I usually find I can achieve 90% of the outcome I'm trying to achieve. I use sonnet for planning, qwen for coding, sonnet for review.
Re: Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
#20This sounds like another version of "As a chat becomes longer, the guardrails seem to become fuzzy". You can't use all of the context window bc at the end, the output would not respect the constraints (or guardrails) but to reliably produce production grade code you want the model to have expansive awareness which fills up the context window pretty quickly. It's like saying "Keep everything in mind from these 6 direc…