v0.1.0

Initial release. Baseline shipping everything from the Phase 0 spike through Phase 5 (UML class diagram).

Added

• Phase 0: Rigor plugin API spike against rigortype 0.2.1
  • rbs ~> 4.0, validating that node_rule(Prism::ClassNode) and friends work and locking in the :info diagnostic output channel.
• Phase 1 (MVP): extraction of inherits / include / prepend / extend edges. Rigor::ModuleGraph::Edge (a Data subclass) with a JSONL writer, Graphviz DOT and Mermaid flowchart renderers, and cycle detection via an iterative Tarjan SCC.
• Phase 2: Zeitwerk-style path → constant inference (ZeitwerkResolver), namespace collapse in both renderers (DOT subgraph cluster_* and Mermaid subgraph), and const_ref edges from constant references inside method bodies (gated on include_constant_refs). Confidence promotes from syntax → zeitwerk when the path-inferred name agrees with the lexical owner.
• Phase 3: indirect mixin resolution via scope.type_of. A Rigor::Type::Singleton carrier lifts the edge to confidence: "rigor_type"; everything else degrades to "unresolved" with the source slice preserved in raw. CLI gains --kind and --confidence filters.
• Phase 4: stats subcommand reporting per-namespace fan-in / fan-out / internal / nodes (text and JSON, with --grouping-depth N and --limit N). Packwerk overlay (--package / --package-root PATH) discovers package.yml files recursively and uses them as the cluster boundary. The Dot / Mermaid renderers accept an explicit groups: mapping for arbitrary node → cluster assignments.
• Phase 5: UML-style class diagram. collect writes a sibling nodes.jsonl covering class / module declarations, method definitions, and attr_* attributes — with visibility tracked via the VisibilityMap's bare private / protected / public keyword walk. Rails associations land as edges (has_many / belongs_to / has_one / has_and_belongs_to_many, with cardinality and a tiny Rails-style inflector that maps :invoices → Invoice). A new Uml::ClassDiagram renderer and class-diagram subcommand emit Mermaid classDiagram syntax; filters --no-methods, --no-attributes, --public-only, --no-private.
• view one-shot subcommand: rigor-module-graph with no args (or view explicitly) analyses the current directory, writes a self-contained HTML report under .rigor/module_graph/, and opens it in a browser. The --output html|mermaid|dot|svg|class-diagram flag switches format; non-html streams to stdout unless -o PATH is given.
• Reachability filter (--from NAMES, --depth N, --direction in/out/both) shared by every reader subcommand. Subsequent --edge-scope cluster|walk flag distinguishes "show the neighbourhood as a cluster" (default) from "show only the edges the BFS actually traversed" (Codex review confirmed naming and direction-both semantics).
• Billing example (examples/billing/): Customer / Invoice / Payment / LineItem + concerns. build.rb runs the same view --output pipeline that ships in the CLI, and commits index.html, class-diagram.html, graph.svg, and a preview.png so the GitHub view of the repo shows the rendered output directly.
• RDoc support via rake rdoc / rake rdoc:preview / rake rdoc:server.
• minitest + minitest-snapshot test harness. Snapshots refresh with UPDATE_SNAPSHOTS=1 rake test.
• SimpleCov C2 (branch) coverage measurement via COVERAGE=1 rake test or rake coverage. Baseline is 91.19% branch coverage (445 / 488 branches).
• lefthook wiring rubocop / betterleaks / rigor / zizmor on pre-commit and minitest on pre-push.
• GitHub Actions: ci.yml (test, lint, workflow-lint) and release.yml (workflow_dispatch-only, uses RubyGems trusted publishing — no long-lived API token).

Performance

• Stats.compute rewritten as a single pass with a mutable per-namespace counter array instead of a Data#with cascade per edge. On 2016 edges this took the call from 139 ms to 47 ms (3.0×).
• Reachability.walk swaps Set for Hash<name, true> + Array frontier, builds only the adjacency direction it actually needs, and the :both-direction walked_edge_indexes shares one pair of indexed adjacencies between its out-walk and in-walk. Cluster depth-3 outbound: 27 ms → 14 ms (1.9×); both direction: 35 ms → 19 ms (1.8×).
• Edge#dedup_key is now a generated Data member set once in Edge.build as a --frozen joined string. Renderer dedup Hashes go from Hash<Array,_> to Hash<String,_>, which drove the 1.2× Dot / Mermaid render gain.
• YJIT (--yjit) adds another ~1.5×. ZJIT measured between baseline and YJIT, and trailed baseline on Stats and CycleDetector — recommendation stays YJIT.

[Unreleased]: v0.1.1...HEAD [0.1.1]: v0.1.0...v0.1.1 [0.1.0]: https://github.com/nozomemein/rigor-module-graph/releases/tag/v0.1.0