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Codex CLI agents suffer from truncated LLM outputs due to hidden token limits

By PulseAugur Editorial · [1 sources] ·

An issue has been identified where the Codex CLI's LLM agents are experiencing truncated tool outputs, leading to incomplete information being processed. This problem, particularly prevalent in code mode, occurs because of an underlying JavaScript execution cell's output limit, which defaults to 10,000 tokens and overrides higher configured limits. Despite attempts to adjust settings and provide clearer instructions, the issue persisted until the developer explicitly set a fixed output token limit for every call, ensuring the agents could re-read truncated sections when necessary. AI

IMPACT This issue highlights potential pitfalls in LLM agent coordination due to hidden output limits, impacting reliability in complex workflows.

RANK_REASON The item details a specific technical issue and its resolution within a particular tool (Codex CLI), rather than a broader industry-impacting release or research finding.

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Codex CLI agents suffer from truncated LLM outputs due to hidden token limits

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Tool
The item details a specific technical issue and its resolution within a particular tool (Codex CLI), rather than a broader industry-impacting release or research finding.
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Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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product, infra
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High
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10 days old
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COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Shinsuke KAGAWA ·

    Codex Was Judging Files It Never Finished Reading

    <p>I run a small team of LLM agents that coordinate through markdown files. Several roles run on Codex CLI 0.165.0, which runs their tool calls in code mode. They read task items, review findings, plans, and design documents, and then decide what to do next.</p> <p>On October 24 …

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