Bug Report: ChatGPT generates over-limit instruction text despite known field limits
`Steps to Reproduce`
- Open ChatGPT Projects or another ChatGPT instruction/configuration field.
- Go to an instruction field such as Project Instructions, Custom Instructions, or Custom GPT instructions.
- Ask ChatGPT to generate or revise paste-ready instructions for that exact field.
- Explicitly tell ChatGPT the applicable hard character limit, such as the 8,000-character Project Instructions limit.
- Ask ChatGPT to keep the output under the limit and provide a paste-ready final version.
- Paste the genera
`Expected Result`
ChatGPT should respect known or user-stated hard limits before presenting instruction/configuration text as paste-ready.
It should:
- count characters including spaces and line breaks;
- stay under the applicable field limit;
- provide the final character count;
- warn when the requested content cannot fit;
- suggest moving long policy, workflow, or reference material into project files or other scoped knowledge sources instead.
If ChatGPT knows the target field and the user states the limit,
`Actual Result`
ChatGPT can generate paste-ready instruction text that exceeds the target field’s hard limit, even when the user explicitly states the limit in the prompt.
Example:
The ChatGPT Projects Instructions field has an 8,000-character limit, but ChatGPT can still generate Project Instructions over that limit. When pasted into the field, the UI rejects the text with:
“Project instructions cannot be longer than 8000 characters.”
The same concern applies to other instruction/configuration fields, inclu
`Environment`
ChatGPT Projects; Project Instructions field; Custom Instructions / Personalization settings; Custom GPT instruction fields; ChatGPT Pro; GPT-5.5 Thinking / Heavy / Pro testing; macOS; Atlas browser and chatgpt.com testing.
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