chore: update the CONTRIBUTING.md and AI_POLICY.md with shared content

AI_POLICY.md

@@ -0,0 +1,62 @@
+# AI Policy for holochain-serialization
+
+If you plan to contribute to holochain-serialization using AI tools, you **must** read,
+understand and follow this policy.
+
+The maintainers of this project support using AI (i.e., LLMs) as tools for coding,
+however we don't want to interact directly with bots. We hold a high
+bar for all contributions to our projects. Thus, contributions must come from a human
+who understands the submitted code or text, can explain it, and is responsible for
+its quality as if they wrote it themselves. Using AI as a tool to help you write
+or reason about a contribution is fine; submitting AI output you don't understand,
+or relaying messages between a maintainer and an AI, is not.
+
+If you wish to include context from an interaction with AI in your comments, it
+must be in a quote block (e.g., using `>`) and disclosed as such. It must be
+accompanied by human commentary explaining the relevance and implications of
+the context.
+
+## Disclosure
+
+You **must** disclose any significant use of AI tools in your contributions, i.e.
+tell us if an AI tool generated or substantially shaped the content
+you submit — code, prose or commit messages — including agents, chat assistants
+and AI-assisted editors. Mechanical editor autocompletion of a few characters
+does not need to be disclosed; if in doubt, disclose.
+
+## Translations
+
+AI is useful when communicating as a non-native English speaker. If you are
+using AI to edit your comments for this purpose, please take the time to ensure
+it reflects your own voice and ideas.
+
+## Provenance and licensing
+
+You are responsible for the provenance of anything you submit. AI tools can
+reproduce code or text from their training data verbatim, which may carry a
+license incompatible with this project. By contributing, you confirm the work
+is yours to submit under the project's license and does not infringe a third
+party's rights. This is the same standard that applies to code you write by hand.
+
+## Consequences
+
+Violating this policy is likely to get your contribution rejected and, for repeated or
+egregious violations, get you blocked from the project without further warning.
+
+## Examples
+
+Examples of things that will get your PR closed:
+
+- Point an agent to a GitHub issue, ask it to solve the issue and open a PR,
+  without understanding the issue, the PR, or testing the solution yourself.
+- Copy responses from the AI (or having it post directly because it has your credentials) when replying to questions from maintainers,
+  without understanding the question or the response.
+  In other words, you should not just be a go-between for
+  the reviewer, and the AI tool.
+
+## Inspiration
+
+This AI policy was inspired by:
+
+- [release-plz](https://github.com/release-plz/.github/blob/main/AI_POLICY.md)
+- [astral](https://github.com/astral-sh/.github/blob/c5187e200db51bfe11d56e13053d29bd3793fdd8/AI_POLICY.md)

CONTRIBUTING.md

@@ -58,6 +58,11 @@ them clean. To help with keeping them clean, follow these principles:
   consistent with the existing codebase and/or it does not solve the problem it
   claims to, then we will close the PR without comment.
 
+## AI Policy
+
+If you use AI tools in any part of your contribution, you must read,
+understand, and follow our [AI Policy](./AI_POLICY.md).
+
 ## Reporting Issues
 
 - Use GitHub Issues to report bugs or request features.