morpharch 1.0.3

morpharch-1.0.3 has been yanked.

MorphArch scans monorepo Git history, builds per-commit dependency graphs using tree-sitter AST parsing, calculates architecture drift scores, and renders the results as an animated force-directed graph in your terminal.

It supports Nx, Turborepo, pnpm workspaces, and Cargo workspaces out of the box, with language-level import extraction for Rust, TypeScript, Python, and Go.

Features

Git history scanning -- walk commit history with gix, extract file trees, and detect workspace configurations automatically.
Tree-sitter AST parsing -- extract real import/dependency edges from source files in Rust, TypeScript, Python, and Go.
Architecture drift scoring -- quantify structural health on a 0--100 scale using fan-in/out deltas, cycle detection (Kosaraju SCC), boundary violation analysis, and cognitive complexity metrics.
Animated TUI -- Verlet physics force-directed graph layout rendered with ratatui and crossterm, featuring a timeline slider, drift insight panel, and Catppuccin Mocha color theme.
Incremental scanning -- subtree-cached tree walks (O(changed_dirs)) and an LRU blob import cache (50K entries) deliver 5--20x speedups on subsequent runs.
Parallel parsing -- rayon-powered data-parallel import extraction across all workspace packages.
Mouse interaction -- click and drag graph nodes to rearrange the layout in real time.
Search filtering -- press / in the TUI to filter nodes by name.
SQLite persistence -- all scan data is stored in ~/.morpharch/morpharch.db for instant replay and historical analysis.
Cross-platform -- runs on Linux, macOS, and Windows.

Installation

From crates.io

cargo install morpharch

From source

git clone https://github.com/onplt/morpharch.git

cd morpharch

cargo build --release

# Binary is at target/release/morpharch

Note: SQLite is bundled via the rusqlite bundled feature, so no system SQLite library is required.

Quick Start

# Scan a monorepo and view drift scores

morpharch scan /path/to/monorepo


# Scan and launch the animated TUI

morpharch watch /path/to/monorepo


# Analyze drift for the current HEAD commit

morpharch analyze


# View the drift trend over recent commits

morpharch list-drift

Usage

`morpharch scan <path>`

Scan a Git repository: walk commit history, build per-commit dependency graphs, calculate drift scores, and persist everything to the SQLite database.

# Scan the current directory (all commits)

morpharch scan .


# Scan a specific repo, limit to last 100 commits

morpharch scan /path/to/repo -n 100

Flag	Description
`-n, --max-commits <N>`	Maximum commits to scan. `0` (default) means unlimited.

`morpharch watch <path>`

Perform a scan and then launch the animated TUI. The TUI displays a force-directed graph of the dependency structure, a timeline slider for navigating commit history, and a drift insight panel with per-commit metrics.

# Watch the current directory

morpharch watch .


# Watch with limited scan depth and timeline snapshots

morpharch watch /path/to/repo -n 200 -s 100

Flag	Description
`-n, --max-commits <N>`	Maximum commits to scan. `0` (default) means unlimited.
`-s, --max-snapshots <N>`	Maximum graph snapshots loaded into the TUI timeline. Default: `200`. When the database contains more, snapshots are sampled at even intervals so the timeline covers the full history.

`morpharch analyze [commit]`

Display a detailed drift report for a specific commit, including the drift score, sub-metrics, boundary violations, circular dependencies, and improvement recommendations.

# Analyze HEAD

morpharch analyze


# Analyze a specific commit

morpharch analyze main~5


# Analyze with explicit repo path

morpharch analyze abc1234 -p /path/to/repo

`morpharch list-graphs`

List the 10 most recent dependency graph snapshots stored in the database.

morpharch list-graphs

`morpharch list-drift`

Display the drift score trend for the last 20 commits as a table, including node/edge counts and delta changes relative to the previous commit.

morpharch list-drift

TUI Keyboard Shortcuts

Key	Action
`j` / `Down`	Navigate to the next (older) commit
`k` / `Up`	Navigate to the previous (newer) commit
`p` / `Space`	Play / pause auto-play through the timeline
`r`	Reheat the graph (re-energize Verlet temperature)
`/`	Enter search mode to filter nodes by name
`Esc`	Exit search mode, or quit the TUI
`q`	Quit the TUI

Mouse Controls

Action	Effect
Click + Drag	Move a graph node (pinned during drag, released on drop)

Drift Score

MorphArch assigns each commit a drift score between 0 and 100. Lower scores indicate healthier architecture; higher scores indicate growing structural problems.

Range	Label
0--30	Healthy
31--50	Stable
51--70	Drifting
71--100	Critical

The score is computed from five sub-metrics:

Fan-in / fan-out delta -- change in the maximum incoming and outgoing edge counts across all nodes compared to the previous commit.
Cyclic dependencies -- number of strongly connected components with more than one node, detected via Kosaraju's algorithm.
Boundary violations -- dependencies that cross architectural layer boundaries (for example, a shared library importing from an application package).
Cognitive complexity -- a proxy metric based on the edge-to-node ratio and cycle count.

A baseline score of 50 is assigned to the first scanned commit. Subsequent commits are scored relative to their predecessor: removing dependencies and resolving cycles pulls the score down, while adding new dependencies, cycles, or boundary violations pushes it up.

Architecture

MorphArch is structured as 20 Rust source files across four logical layers:

src/
  main.rs              Entry point and CLI dispatch
  cli.rs               Clap derive definitions for all subcommands
  config.rs            Configuration management and default paths
  models.rs            Core data structures (commits, graphs, scores, deltas)
  utils.rs             Logging initialization and error formatting

  git_scanner.rs       Git commit walking and tree diffing via gix
  parser.rs            Tree-sitter import extraction (Rust, TS, Python, Go)
  graph_builder.rs     petgraph directed graph construction from parsed edges
  scoring.rs           Drift score engine with SCC, fan metrics, boundaries
  db.rs                SQLite layer for persistence (~/.morpharch/morpharch.db)

  commands/
    mod.rs             Command module re-exports
    scan.rs            `scan` subcommand implementation
    watch.rs           `watch` subcommand: scan then launch TUI
    analyze.rs         `analyze` subcommand: per-commit drift report

  tui/
    mod.rs             TUI module re-exports
    app.rs             Main TUI application state, event loop, render loop
    graph_renderer.rs  Verlet physics engine and ratatui Canvas rendering
    timeline.rs        Commit timeline slider widget
    insight_panel.rs   Drift metrics and recommendations panel
    widgets.rs         Shared widget helpers

Key dependencies

Crate	Purpose
`gix`	Pure-Rust Git operations (commit walking, tree diffing, blob reading)
`tree-sitter`	Incremental parsing framework for import extraction
`petgraph`	Directed graph data structure and SCC algorithm
`rusqlite`	SQLite storage with bundled library
`ratatui`	Terminal UI framework
`crossterm`	Cross-platform terminal backend
`tokio`	Async runtime for the TUI event loop
`rayon`	Data-parallel iteration for parsing
`lru`	Bounded LRU cache for blob import results
`clap`	CLI argument parsing with derive macros

Performance

MorphArch is designed for large monorepos with thousands of commits and hundreds of packages.

Incremental scanning -- only changed directories are re-parsed on subsequent runs, using subtree hash caching at O(changed_dirs) cost.
LRU blob cache -- a 50,000-entry cache avoids redundant tree-sitter parsing of unchanged files across commits.
Parallel parsing -- rayon distributes import extraction across all available CPU cores.
Graph physics -- the Verlet integration loop runs at O(V^2 + E) per frame, which stays under 4ms for graphs with up to 500 nodes.
Release profile -- LTO, single codegen unit, and symbol stripping are enabled for optimized builds.

Minimum Supported Rust Version

The current MSRV is 1.85 (Rust edition 2024).

Contributing

Contributions are welcome. To get started:

Fork the repository and create a feature branch.
Make your changes and ensure all tests pass:
```
cargo test
```

Run clippy and check formatting:

cargo clippy -- -D warnings

cargo fmt --check

Open a pull request against main.

Please open an issue first for large changes or new features so the design can be discussed before implementation begins.

License

Licensed under either of

Apache License, Version 2.0 (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
MIT License (LICENSE-MIT or https://opensource.org/licenses/MIT)

at your option.

Changelog

See CHANGELOG.md for release history and migration notes.