refactor(root): move root artefacts to their canonical locations

.github/CONTRIBUTING.md

@@ -0,0 +1,104 @@
+# Clone the repository
+
+git clone <https://github.com/hyperpolymath/http-capability-gateway.git>
+cd http-capability-gateway
+
+# Using Nix (recommended for reproducibility)
+
+nix develop
+
+# Or using toolbox/distrobox
+
+toolbox create http-capability-gateway-dev toolbox enter
+http-capability-gateway-dev \# Install dependencies manually
+
+# Verify setup
+
+just check \# or: cargo check / mix compile / etc. just test \# Run test
+suite
+
+
+    ### Repository Structure
+
+http-capability-gateway/ ├── 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.nix \# Nix 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/http-capability-gateway/labels/good%20first%20issue) — Simple Perimeter 3 tasks
+    - [`help wanted`](https://github.com/hyperpolymath/http-capability-gateway/labels/help%20wanted) — Community help needed
+    - [`documentation`](https://github.com/hyperpolymath/http-capability-gateway/labels/documentation) — Docs improvements
+    - [`perimeter-3`](https://github.com/hyperpolymath/http-capability-gateway/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/):
+
+():
+
+\[optional body\]
+
+\[optional footer\]

.machine_readable/contractiles/Justfile

@@ -364,11 +364,11 @@ state-phase:
 
 # Enter Guix development shell (primary)
 guix-shell:
-    guix shell -D -f guix.scm
+    guix shell -D -f build/guix.scm
 
 # Build with Guix
 guix-build:
-    guix build -f guix.scm
+    guix build -f build/guix.scm
 
 # Enter Nix development shell (fallback)
 nix-shell:

Justfile

@@ -364,11 +364,11 @@ state-phase:
 
 # Enter Guix development shell (primary)
 guix-shell:
-    guix shell -D -f guix.scm
+    guix shell -D -f build/guix.scm
 
 # Build with Guix
 guix-build:
-    guix build -f guix.scm
+    guix build -f build/guix.scm
 
 # Enter Nix development shell (fallback)
 nix-shell:

QUICKSTART-MAINTAINER.adoc

@@ -32,7 +32,7 @@ Output: `{{BUILD_OUTPUT_PATH}}`
 
 [source,bash]
 ----
-guix build -f guix.scm
+guix build -f build/guix.scm
 ----
 
 === Nix