v2.0.0

Added

• reconcile now commits multi-file updates as one conflict-detecting durable transaction, recovers
  interrupted work automatically before real runs, and provides recovery-only --recover mode;
  init prints the corresponding transaction-artifact ignore patterns.
• Empty ATX headings such as # and ## are now recognized and receive the same empty GitHub
  slug that github-slugger generates.
• Document symlinks whose targets remain inside the project root are now supported. Aliases to the
  same resolved document are loaded once, while external targets are skipped with a warning and
  reconcile revalidates containment before writing.

Changed

• Documentation ownership is consolidated: README.md owns the user contract, ARCHITECTURE.md owns
  durable decisions and module boundaries, CLAUDE.md routes contributors and agents, CHANGELOG.md
  owns history and migrations, and roadmap.md contains future direction only.
• Internal: doc_lattice.cli is now a package with a frozen per-invocation runtime, focused
  command adapters, centralized output and error handling, and command-mirrored CLI tests. Runtime
  behavior is unchanged.
• Internal: Markdown heading recognition and GitHub-compatible slug generation now pass through a
  documented adapter pinned to markdown-it-py==4.2.0 and github-slugger@2.0.0. The slug-strip
  and JavaScript Unicode 17 lowercase and contextual-casing compatibility data is generated from
  upstream. Section spans and the cache schema are unchanged, but existing version-2 load caches
  are rebuilt so parser-derived anchors and spans use the new adapter. Rare headings whose casing
  data was absent from Python Unicode 15.1 now receive the upstream-compatible section id.
• Internal: the load cache module is now a phase-separated doc_lattice/cache/ package
  (schema/codec, store, lookup, run state). No user-facing behavior change; the cache file
  format is unchanged.

Fixed

• Markdown files that open YAML frontmatter without a closing --- now fail with a
  source-naming tool error (exit 2) across cached and uncached loads instead of being silently
  omitted from the lattice. Existing version-1 load caches are rebuilt.

Removed

• BREAKING (2.0): Removed the unsupported binding_layers configuration key. Migration:
  delete the key from 1.x configs; there is no replacement, and lint's fixed authority ladder
  is unchanged. Strict configuration now rejects the key.
• BREAKING (2.0): Removed the silent --json alias from check, lint, impact,
  reconcile, and linear; impact, reconcile, and linear now accept --format human|json.
  Migration: replace --json with --format json. --indent now requires an effective
  --format json, and the former --json/--format github conflict rule is gone along with
  the alias.
• Internal: removed the singular section_span helper in favor of the existing section_spans
  API.
• Deleted completed design specs and implementation plans after recording their durable Linear,
  load-cache, and Markdown compatibility decisions in ARCHITECTURE.md. Also deleted the duplicate
  code-conventions guide and incomplete build log; their owners are CLAUDE.md and CHANGELOG.md.
  Version control retains the implementation history.