Avoid Context Limit Errors — Catch Overflow Before It Fails
"Context length exceeded" is a planning failure, not bad luck. Catch High Risk content before sending: the limit inside the estimate range is the warning.
Overview
Context limit errors feel random because the failing margin is invisible: content near the limit may fit one day and fail the next, depending on how the tokenizer breaks it. This scenario loads exactly that case — a report pack whose estimate range straddles the available budget. The verdict is High Risk, and its meaning is precise: the limit falls INSIDE the estimate range, so success depends on tokenization details you do not control. The guidance is equally direct: do not ship workflows on this margin — split into sequenced parts, switch to a larger window, or cut the largest low-value sections.
Workflow
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Estimate before retrying
A failed paste retried unchanged fails again — check where the content sits against the budget first.
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Respect High Risk
Limit inside the estimate range means tokenizer-dependent failure — treat it as a no, not a maybe.
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Fix structurally
Split, switch models, or cut — the guidance names all three with the tradeoffs.
Why This Works
- The range explains the intermittence that single-number counters cannot
- High Risk as a named class makes the invisible margin visible
- Structural fixes end the failure class instead of dodging one instance
Best for
- Workflows that fail on some inputs and not others
- Content that grew gradually past its original size
- Anyone retrying a failed paste without knowing why it failed
Not for
- Performing the split itself — that's the Long Prompt Splitter
- Debugging application errors unrelated to context size — that's the Debugging Prompt Generator
Use cases
- Diagnosing intermittent context-length failures
- Pre-checking content that failed once already
- Hardening recurring jobs against size drift