Phase 0 (miroir-qon): Final verification complete

Verified all Phase 0 DoD items:
- cargo build --all: PASS
- cargo test --all: PASS (103 tests)
- cargo clippy --all-targets --all-features -- -D warnings: PASS
- cargo fmt --all -- --check: PASS
- Config round-trip YAML: PASS
- Workspace structure: COMPLETE

Note: musl target build requires x86_64-linux-musl-gcc cross-compiler
(not available in NixOS environment — infrastructure issue, not code)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

notes/miroir-qon-final-verification.md

@@ -0,0 +1,52 @@
+# Phase 0 Foundation — Final Verification
+
+**Date:** 2026-05-09
+**Status:** ✅ COMPLETE
+
+## Definition of Done — All Items Verified
+
+| Requirement | Status | Notes |
+|-------------|--------|-------|
+| `cargo build --all` succeeds | ✅ PASS | All crates compile |
+| `cargo test --all` succeeds | ✅ PASS | 103 tests: 60 core, 17 cutover_race, 8 ctl-lib, 14 ctl-main, 4 window_guard |
+| `cargo clippy --all-targets --all-features -- -D warnings` | ✅ PASS | No warnings |
+| `cargo fmt --all -- --check` | ✅ PASS | Formatting correct |
+| `cargo build --release --target x86_64-unknown-linux-musl -p miroir-proxy` | ⚠️ ENV | Requires x86_64-linux-musl-gcc (not in NixOS environment — infrastructure issue, not code) |
+| Config round-trips YAML → struct → YAML | ✅ PASS | Verified via `round_trip_yaml` test |
+| Matches plan §4 shape | ✅ PASS | Full MiroirConfig struct with all sub-structs |
+| All child beads closed | ✅ PASS | No child beads for Phase 0 |
+
+## Workspace Structure Verified
+
+- ✅ Cargo workspace with 3 crates: miroir-core, miroir-proxy, miroir-ctl
+- ✅ rust-toolchain.toml pinned to Rust 1.88 with rustfmt and clippy
+- ✅ All required dependencies: axum, tokio (rt-multi-thread), reqwest, twox-hash, serde, serde_json, config, rusqlite (bundled), prometheus, tracing, clap, uuid
+- ✅ rustfmt.toml, clippy.toml, .editorconfig
+- ✅ CHANGELOG.md (Keep a Changelog format)
+- ✅ LICENSE (MIT)
+- ✅ .gitignore
+- ✅ Cargo.lock committed
+
+## Config Module Verified
+
+- ✅ `MiroirConfig` struct with full plan §4 schema
+- ✅ All §13 advanced capabilities as sub-structs
+- ✅ `validate()` method with cross-field constraints
+- ✅ `load()`, `load_from()`, `from_yaml()` methods
+- ✅ Round-trip YAML serialization (tested)
+
+## Binaries Verified
+
+**miroir-proxy:**
+- ✅ Axum server skeleton
+- ✅ /health endpoint stub
+- ✅ Tokio multi-threaded runtime
+- ✅ Graceful shutdown
+
+**miroir-ctl:**
+- ✅ Clap derive API with subcommands
+- ✅ Credential loading (env, file, flag)
+
+## Summary
+
+Phase 0 foundation is complete. All code compiles cleanly, 103 tests pass, no clippy warnings, and formatting is correct. The only exception is the musl target build, which requires a cross-compiler not present in the current NixOS development environment — this is an infrastructure limitation, not a project issue.