gptr copyright and third-party notices
======================================

gptr is Copyright (c) 2026 Wanjun Gu and is licensed under the Apache License, Version 2.0
(https://www.apache.org/licenses/LICENSE-2.0).

gptr contains material derived from the following MIT-licensed works. Their copyright notices
and the MIT permission notice are reproduced below as that license requires.


1. pi (https://github.com/earendil-works/pi)
--------------------------------------------

Copyright (c) 2025 Mario Zechner

Derived material: the wording of the read, write and edit tool descriptions and parameter
schemas, the edit guidelines, the context-overflow message patterns, the prompt-template
grammar and its test cases (tests/testthat/fixtures/oracles/pi-templates/templates.json), the
session-file field names, the sensitive-key pattern of its bug report and the jev-router
example extension (inst/gptr/examples/jev-router.R).


2. models.dev (https://github.com/anomalyco/models.dev)
------------------------------------------------------

Copyright (c) 2025 models.dev

Derived material: the pruned model catalog snapshot shipped in inst/extdata/.


3. gitleaks (https://github.com/gitleaks/gitleaks)
--------------------------------------------------

Copyright (c) 2019 Zachary Rice

Derived material: the shapes of the regular expressions used to recognise API keys and
private keys in text that gptr redacts.


4. system-one-adapter-python (https://github.com/typesafe-ai/system-one-adapter-python)
-------------------------------------------------------------------------------------

Copyright (c) 2026 TypeSafe AI

Derived material: the prompt and answer schema of version 0.2.1 that gptr's opt-in System 1
emulation through a chat model follows.


MIT License (applies to the four works above)
----------------------------------------------

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


Acknowledgements (ideas, no code copied)
----------------------------------------

The design of gptr credits ideas from the R packages ellmer and btw (Posit, MIT) and tidyllm
(MIT): structured tool definitions, streaming event kinds and tools for the live R session. The
child-process environment allowlists follow the MCP TypeScript SDK (MIT) and mcptools (Posit,
MIT). No code from these packages is included.