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hongjr03 3f9b60f692 chore: remove Lean spec; ADRs are the single source of truth
The spec/ Lean semantic master had no conformance gate, no codegen, and
no CI tie to implementations — alignment was carried entirely by human
review, the same mechanism that carries the ADRs. In practice the ADRs
plus greppable code comments were already the load-bearing artifacts,
so spec/ was the most expensive kind of stale documentation.

- delete spec/ and the spec-check CI workflow
- README: constitution rewritten around ADRs as decision truth
- AGENTS.md/CLAUDE.md: discipline re-anchored (new decisions -> new ADR,
  never rewrite ADR history; supersede instead)
- code comments: re-anchor 'Mirrors Spec.X' invariants to ADR numbers
  (cph-diag, cph-check, cph-model, hub runner/capacity/org, prisma)
- leave ADR bodies and .scratch audit snapshots untouched (history);
  fix live references in open readiness tickets
2026-07-20 09:07:26 +00:00

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# crates/
These crates implement the rule-based lesson checker whose semantics are
pinned by the ADRs in `docs/adr/`: it reads an engineering-file (one lesson,
ADR-0005)
laid out per ADR-0008 (declarative `manifest.toml` + per-element
`element.toml`), validates structure and content, and emits diagnostics.
`cph-diag` (the shared diagnostic vocabulary), `cph-model` (the ADR-0008 loader),
and `cph-typst` (the typst `World` / compile / span-mapping layer) are
deliberately reusable by future components such as an `exporter`, which is why
they live in this repo-wide `crates/` directory rather than under any single
component; `cph-schema` (kind JSON Schemas + validation), `cph-check`
(orchestration + render-coverage) and `cph-cli` (the `cph` command-line
entrypoint) are the checker proper.
## Crate map
| crate | owner | role |
|---------------|-------|------|
| `cph-diag` | WU-1 | shared diagnostic vocabulary (`Severity`, `DiagCode`, `Diagnostic`, `SourceSpan`) — reusable |
| `cph-model` | WU-1 | parses the ADR-0008 layout into an in-memory ordered `Lesson` — reusable |
| `cph-schema` | WU-3 | the 4 stdlib kind JSON Schemas + structural validation |
| `cph-typst` | WU-4 | typst `World`, driver generation, compile, PDF, span mapping — reusable |
| `cph-check` | WU-5 | orchestration: render-coverage and the full check pipeline |
| `cph-cli` | WU-5 | the `cph` command-line entrypoint |
## Build
```sh
# from the repository root (the cargo workspace root)
cargo build # all crates
cargo test # cph-diag + cph-model unit/integration tests
cargo clippy --all-targets -- -D warnings
cargo fmt --check
```