docs: the repository of its own: licences, CI, citations checked in form (P13 step 6)

spec/ and examples/ are CC BY 4.0, the code MIT OR Apache-2.0. The
verbatim-pin and rules.md-id checks need wanderbooks' vendored sources and
rules.md, so they move to wanderbooks; here a citation is checked in form.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HS8WZziDnyxunC23MUxrLp

README.md

@@ -1,13 +1,12 @@
-# bookspec: examples (seed)
+# bookspec
 
 bookspec is the formal accounting specification planned in
-`plan/served.md` (P13, D-34): every rule stated normatively, sourced to its
+wanderbooks' `plan/served.md` (P13, D-34): every rule stated normatively, sourced to its
 authority, with a symbolic form and concrete examples, independent of any
-engine. Its own repository comes later. Until then this directory holds its
-first examples: P3's regression tests, each written here as it is built, so
+engine. `examples/` holds its first examples: P3's regression tests, each written here as it is built, so
 the spec starts from cases a real engine got wrong.
 
-Every example is checked against wanderbooks on every `cargo test`
+Every example is checked against wanderbooks on every `cargo test` there
 (`crates/ledger-core/tests/bookspec.rs`, and for the formats appendix
 `crates/ledger-package/tests/package.rs`): an example the engine disagrees
 with fails the build, so the examples can't rot. An expected value is worked
@@ -528,7 +527,19 @@ the GnuCash adapter: GnuCash has no reversal link, so it cannot answer
 ## Licence and sources
 
 The examples state rules in their own words with the paragraph cited
-(FASB's Codification is copyrighted: cited, never copied; see
-`docs/spec/sources/fasb-asc.md`). The examples are MIT OR Apache-2.0, as
-the rest of this repository, until bookspec moves to its own repository
-(planned: the spec under CC BY 4.0).
+(FASB's Codification is copyrighted: cited, never copied).
+
+| What | Licence |
+|---|---|
+| `spec/` and `examples/` (the specification) | CC BY 4.0 (`LICENSE-CC-BY-4.0`) |
+| `checker/`, `runner/`, `gnucash/`, `lean/` (the code) | MIT OR Apache-2.0 (`LICENSE-MIT`, `LICENSE-APACHE`) |
+
+## Home and consumers
+
+The canonical home is `https://github.com/swaits/bookspec`; the mirror is
+`https://git.swaits.com/swaits/bookspec`. wanderbooks consumes this
+repository as a git dependency pinned to a commit, so its `just check`
+keeps running every example through `bookspec_checker::examples()`. The
+vendored authorities that `spec/` cites (`docs/spec/sources/`) and
+`docs/spec/rules.md` stay in wanderbooks, which checks the pins and the
+rule ids against `bookspec_checker::spec_files()`.