OSS launch polish: fix hook paths, add OSS files, update README

- Fix slashes in agent identity causing invalid hook file paths (gt-vqhc)
- Add Prerequisites section to README (gt-vzic)
- Create CONTRIBUTING.md, CODE_OF_CONDUCT.md, SECURITY.md (gt-xbfw)
- Update Install section for future package managers (gt-7wcf)

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CODE_OF_CONDUCT.md

@@ -0,0 +1,36 @@
+# Code of Conduct
+
+## Our Pledge
+
+We pledge to make participation in our project a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior:
+
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information without explicit permission
+- Other conduct which could reasonably be considered inappropriate
+
+## Enforcement
+
+Project maintainers are responsible for clarifying standards of acceptable behavior and will take appropriate action in response to unacceptable behavior.
+
+Maintainers have the right to remove, edit, or reject comments, commits, code, issues, and other contributions that do not align with this Code of Conduct.
+
+## Reporting
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by opening an issue or contacting the project maintainers directly.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org/), version 2.0.