pi-gpt55-complete

Pi package that folds GPT-5.5 518n-2 reasoning truncations for OpenAI Codex.

Packages

Package details

extension

Install pi-gpt55-complete from npm and Pi will load the resources declared by the package manifest.

npm repohome report
$ pi install npm:pi-gpt55-complete
Package
pi-gpt55-complete
Version
0.1.0
Published
Aug 4, 2026
Downloads
183/mo · 17/wk
Author
ypquinn
License
MIT
Types
extension
Size
16.5 KB
Dependencies
0 dependencies · 2 peers
Pi manifest JSON
{
  "extensions": [
    "./extensions/gpt55-complete.ts"
  ]
}

Security note

Pi packages can execute code and influence agent behavior. Review the source before installing third-party packages.

README

pi-gpt55-complete

A pi package that mitigates GPT-5.5's intermittent 518n - 2 reasoning truncation pattern (516, 1034, 1552, ...) for the built-in openai-codex/gpt-5.5 model.

The extension only applies to:

openai-codex/gpt-5.5

Other OpenAI Codex models are delegated to pi's built-in provider unchanged.

What it does

When a GPT-5.5 round ends with usage.reasoning == 518 * n - 2 and the reasoning block contains encrypted replay state, the extension:

  1. streams reasoning blocks live;
  2. buffers tentative text/tool-call output;
  3. appends a commentary Continue thinking... replay message carrying the encrypted reasoning signature;
  4. opens another round;
  5. folds the reasoning blocks plus the final clean round's output into one assistant message.

Continuation rounds are capped at 3.

Install

From npm, after publishing:

pi install npm:pi-gpt55-complete

From GitHub:

pi install git:github.com/YPQuinn/pi-gpt55-complete@v0.1.0

For local development:

pi -e . --model openai-codex/gpt-5.5:xhigh

Development smoke test

pi --no-extensions -e . --list-models gpt-5.5
npm pack --dry-run

Security

Pi extensions run with the same permissions as your local pi process. This package does not persist or log credentials; it delegates transport/auth to pi's built-in OpenAI Codex provider.

Credits

The detect-and-continue mechanism is inspired by the codexcomp / CodexCont approach for GPT-5.5's 518n - 2 reasoning truncation fingerprint.

License

MIT