refactor: migrate Markdown to AsciiDoc

ARCHITECTURE.adoc

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+== Architecture
+
+=== Overview
+
+This repository follows a modular, maintainable architecture designed
+for clarity, scalability, and long-term sustainability.
+
+=== Directory Structure
+
+....
+.
+├── src/           # Source code
+├── tests/        # Test suites
+├── docs/         # Documentation
+├── scripts/      # Utility scripts
+├── config/       # Configuration files
+├── LICENSE       # License file
+├── LICENSES/     # Full license texts
+└── README.adoc   # Project documentation
+....
+
+=== Design Principles
+
+* *Separation of Concerns*: Each module has a single responsibility
+* *Testability*: Code is written to be easily testable
+* *Documentation*: All public APIs are documented
+* *Configuration*: Environment-specific settings are externalized
+
+=== Dependencies
+
+* External dependencies are minimized and clearly declared
+* Version pinning is used for reproducibility
+
+=== Security Considerations
+
+* Sensitive data is never committed to the repository
+* Secrets are managed through environment variables or secure vaults
+* Regular dependency audits are performed
+
+=== Maintainability
+
+* Code follows consistent style guidelines
+* Pull requests require review and CI checks
+* Issues and discussions are tracked transparently
+
+'''''
+
+_Last updated: 2026-07-18_

CHANGELOG.adoc

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+== Changelog
+
+All notable changes to `+bgp-backbone-lab+` will be documented in this
+file.
+
+This file is generated from conventional commits by the
+https://github.com/hyperpolymath/standards/blob/main/.github/workflows/changelog-reusable.yml[`+changelog-reusable.yml+`]
+workflow (`+hyperpolymath/standards#206+`). Adopt the workflow in this
+repo’s CI to keep this file in sync automatically — see
+https://github.com/hyperpolymath/standards/blob/main/templates/cliff.toml[`+templates/cliff.toml+`]
+for the canonical config.
+
+The format follows https://keepachangelog.com/en/1.1.0/[Keep a
+Changelog]; this project aims to follow
+https://semver.org/spec/v2.0.0.html[Semantic Versioning].
+
+=== [Unreleased]
+
+==== Added
+
+* feat: add FlatRacoon manifest, containerlab topology, and K8s job
+* feat(ci): enable Hypatia scanning
+* feat: initial scaffolding for BGP backbone lab
+
+==== Fixed
+
+* fix(licence): clear scaffold-placeholder leak (Tranche 2) (#38)
+* fix(ci): sync hypatia-scan.yml to canonical (413:
+env.HOME+Phase-2+SARIF) (#36)
+* fix(ci): adopt canonical hypatia-scan.yml (env.HOME/scanner-layout +
+Comment-step gate) (#34)
+* fix(ci): Phase-2 fleet submission must not fail the security gate
+(#33)
+* fix(ci): hypatia-scan workdir ($\{\{ env.HOME }} resolves empty) (#32)
+* fix(ci): move secret-scanner Cargo.toml gate from job-level if: to
+step-level (#30)
+* fix(codeql): switch language matrix to '`actions`' (no JS/TS in repo)
+(#29)
+* fix(ci): hypatia-scan.yml – pass GITHUB_TOKEN, use –exit-zero
+(hyperpolymath/hypatia#213) (#27)
+* fix(ci): update hypatia binary detection in hypatia-scan workflow
+* fix: remove duplicate SCM files from root
+
+==== Documentation
+
+* docs(readme): add SPDX header and/or standard badges
+* docs: add checkpoint files for state tracking
+
+==== CI
+
+* ci(secret-scanner): drop duplicate –fail from trufflehog extra_args
+(#26)
+* ci: bump actions/upload-artifact SHA to current v4 (#25)
+* ci: fix workflow-linter YAML parse error + self-flag bug
+* ci: fix workflow-linter self-flag bug
+
+=== Pre-history
+
+Prior commits to this file’s introduction are recorded in git history
+but not formally classified into Keep-a-Changelog sections. To backfill,
+run `+git cliff -o CHANGELOG.md+` locally using the canonical
+https://github.com/hyperpolymath/standards/blob/main/templates/cliff.toml[`+cliff.toml+`]
+— this is one-shot mechanical work.
+
+'''''

CODE_OF_CONDUCT.adoc

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+== Contributor Covenant Code of Conduct
+
+=== Our Pledge
+
+We pledge to make participation a harassment-free experience for
+everyone.
+
+=== Our Standards
+
+*Positive behavior:* * Using welcoming language * Being respectful of
+differing viewpoints * Accepting constructive criticism * Focusing on
+what is best for the community
+
+*Unacceptable behavior:* * Harassment, trolling, or personal attacks *
+Publishing private information without permission
+
+=== Enforcement
+
+Report issues to the maintainers. All complaints will be reviewed.
+
+=== Attribution
+
+Adapted from https://www.contributor-covenant.org/[Contributor Covenant]
+v2.1.

CONTRIBUTING.adoc

@@ -1,20 +1,108 @@
-// SPDX-License-Identifier: CC-BY-SA-4.0
-= Contributing Guide
+== Clone the repository
 
-== Getting Started
+git clone https://github.com/hyperpolymath/flatracoon.git cd flatracoon
 
-1. Fork the repository
-2. Create a feature branch from `main`
-3. Sign off commits (`git commit -s`)
-4. Submit a pull request
+== Using Guix (recommended for reproducibility)
 
-== Commit Guidelines
+guix develop
 
-* Conventional commits: `type(scope): description`
-* Sign all commits (DCO required)
-* Atomic, focused commits
+== Or using toolbox/distrobox
 
-== License
+toolbox create flatracoon-dev toolbox enter flatracoon-dev # Install
+dependencies manually
 
-Contributions licensed under project license.
+== Verify setup
 
+just check # or: cargo check / mix compile / etc. just test # Run test
+suite
+
+....
+
+### Repository Structure
+....
+
+flatracoon/ ├── src/ # Source code (Perimeter 1-2) ├── lib/ # Library
+code (Perimeter 1-2) ├── extensions/ # Extensions (Perimeter 2) ├──
+plugins/ # Plugins (Perimeter 2) ├── tools/ # Tooling (Perimeter 2) ├──
+docs/ # Documentation (Perimeter 3) │ ├── architecture/ # ADRs, specs
+(Perimeter 2) │ └── proposals/ # RFCs (Perimeter 3) ├── examples/ #
+Examples (Perimeter 3) ├── spec/ # Spec tests (Perimeter 3) ├── tests/ #
+Test suite (Perimeter 2-3) ├── .well-known/ # Protocol files (Perimeter
+1-3) ├── .github/ # GitHub config (Perimeter 1) │ ├── ISSUE_TEMPLATE/ │
+└── workflows/ ├── CHANGELOG.md ├── CODE_OF_CONDUCT.md ├──
+CONTRIBUTING.md # This file ├── GOVERNANCE.md ├── LICENSE ├──
+MAINTAINERS.md ├── README.adoc ├── SECURITY.md ├── flake.guix # Guix
+flake (Perimeter 1) └── Justfile # Task runner (Perimeter 1)
+
+....
+
+---
+
+## How to Contribute
+
+### Reporting Bugs
+
+**Before reporting**:
+1. Search existing issues
+2. Check if it's already fixed in `main`
+3. Determine which perimeter the bug affects
+
+**When reporting**:
+
+Use the [bug report template](.github/ISSUE_TEMPLATE/bug_report.md) and include:
+
+- Clear, descriptive title
+- Environment details (OS, versions, toolchain)
+- Steps to reproduce
+- Expected vs actual behaviour
+- Logs, screenshots, or minimal reproduction
+
+### Suggesting Features
+
+**Before suggesting**:
+1. Check the [roadmap](ROADMAP.md) if available
+2. Search existing issues and discussions
+3. Consider which perimeter the feature belongs to
+
+**When suggesting**:
+
+Use the [feature request template](.github/ISSUE_TEMPLATE/feature_request.md) and include:
+
+- Problem statement (what pain point does this solve?)
+- Proposed solution
+- Alternatives considered
+- Which perimeter this affects
+
+### Your First Contribution
+
+Look for issues labelled:
+
+- [`good first issue`](https://github.com/hyperpolymath/flatracoon/labels/good%20first%20issue) — Simple Perimeter 3 tasks
+- [`help wanted`](https://github.com/hyperpolymath/flatracoon/labels/help%20wanted) — Community help needed
+- [`documentation`](https://github.com/hyperpolymath/flatracoon/labels/documentation) — Docs improvements
+- [`perimeter-3`](https://github.com/hyperpolymath/flatracoon/labels/perimeter-3) — Community sandbox scope
+
+---
+
+## Development Workflow
+
+### Branch Naming
+....
+
+docs/short-description # Documentation (P3) test/what-added # Test
+additions (P3) feat/short-description # New features (P2)
+fix/issue-number-description # Bug fixes (P2) refactor/what-changed #
+Code improvements (P2) security/what-fixed # Security fixes (P1-2)
+
+....
+
+### Commit Messages
+
+We follow [Conventional Commits](https://www.conventionalcommits.org/):
+....
+
+():
+
+{empty}[optional body]
+
+{empty}[optional footer]