Review maps 8 common multi-step agent failure modes to structural architectural fixes
blaizedsouza · x · 2026-11-08
A research review of multi-step agent architecture systematically maps eight common failure modes to the structural fixes teams have tried, along with what each one measurably buys and costs:
- Early failure and how architecture can prevent it
- Hand-off efficiency losses in multi-agent setups
- Noisy context degrading execution
- More agents, same mistakes: adding agents doesn't fix repeated errors
- Big context introducing new problems
- LLMs tend to agree: models lack genuine counterbalance
- Faster/cheaper structural trade-offs
- Learning from execution
The core thesis: an agent architecture is a set of model calls plus orchestration structure, and each architecture fixes specific failure modes — so choosing one means understanding what it buys and what it costs.
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