TRIAGE framework cuts LLM agent token costs through trajectory reuse
TRIAGE addresses a core inefficiency in ReAct-based LLM agents: redundant reasoning cycles that waste tokens on repeated problem-solving. The framework introduces Trajectory-as-a-Skill, which caches and abstracts prior execution paths into reusable components, enabling three-tier query routing from zero-token direct reuse to parameter-optimized skill substitution. This shifts agent economics from compute-per-query to experience-leverage, directly impacting inference costs and latency for production deployments. The work signals growing focus on agent efficiency as a competitive lever beyond raw model capability.
Modelwire context
ExplainerTRIAGE's actual contribution is narrower than it first appears: it's a caching and abstraction layer for agent trajectories, not a new reasoning method. The three-tier routing is essentially a lookup table with fallback to skill substitution, which trades memory for inference cost. The paper doesn't address whether cached trajectories generalize across problem domains or degrade when task distribution shifts.
This sits directly alongside MemoryWalker and HarnessDev from early September. MemoryWalker solved the training-inference mismatch when agents compress context mid-execution, while TRIAGE assumes trajectories can be reliably cached and reused. Together they suggest the agent efficiency frontier is moving from 'how do we reason better' to 'how do we avoid reasoning at all'. HarnessDev's finding that agents should design their own infrastructure also implies TRIAGE-style caching might become a self-discovered optimization rather than a manually imposed one. The three papers form a coherent narrative about agent maturation: first fix training dynamics, then optimize execution paths, then let systems architect their own infrastructure.
If TRIAGE's trajectory cache shows >80% hit rates on held-out task distributions from the same domain (e.g., code generation across different repos), that confirms the approach scales. If hit rates drop below 40% when tested on out-of-domain tasks, the method is domain-specific and less broadly useful than framed. Watch whether production deployments (Claude Code, Qwen-Agent) adopt trajectory caching in their next iteration; absence would suggest the token savings don't justify the memory overhead in practice.
Coverage we drew on
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MentionsReAct · TRIAGE · Trajectory-as-a-Skill · LLM agents
Modelwire Editorial
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Modelwire summarizes, we don’t republish. arXiv cs.LG originally reported this story as “TRIAGE: Three-level Routing and Intelligent Agent Guidance for Efficient Execution”. The full content lives on arxiv.org. If you’re a publisher and want a different summarization policy for your work, see our takedown page.