Shastra

Portfolio workspace. Production-grade tools that put Claude — and other humans — in physical contact with real systems: one in your browser tab, one inside your kernel, one in everyone's browser at once.

shastra/
├─ yantra/    WebGPU heat-conduction simulator. Drop an STL, watch heat spread.
├─ trishul/   Rust MCP server. Live process / network / USB / syscall view for Claude.
├─ naadi/     Multiplayer WebGPU shader sandbox. CRDT + WebRTC P2P; co-edit one WGSL.
└─ darshan/   Local-first vision agent. Pluggable inference shell. OCR + dashcam in-tab.

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Projects

Project	What it is	Stack	Status
yantra	Finite-element heat-conduction solver running entirely in your browser. Drop an STL, pick a material, set hot/cold faces, watch the colormap evolve as steady-state converges.	Astro 5 · Preact 10 · Three.js · WebGPU + WGSL · Bun	shipped
trishul	MCP server giving Claude live OS observability — process tree, network listeners, USB topology, host info, and a real eBPF / DTrace / ETW syscall trace. 7 tools, cross-platform.	Rust 2024 · rmcp 1.7 · aya · ferrisetw · sysinfo · netstat2 · nusb	shipped
naadi	Multiplayer WebGPU shader sandbox. Co-edit one WGSL fragment shader; every peer's GPU renders the shared scene independently. CRDT-backed, peer-to-peer, zero server bandwidth after handshake.	Astro 5 · Preact 10 · Tailwind v4 · CodeMirror 6 · Loro CRDT · WebRTC · WebGPU + WGSL · Bun	shipped
darshan	Local-first vision agent. Drop a file, run a model in your tab. Pluggable inference shell: swappable pipelines (echo, Devanagari OCR, dashcam incident extractor) on swappable backends (Mock, transformers.js, ORT Web, Rust+WASM). Zero cloud.	Astro 6 · Preact 10 · Tailwind v4 · tesseract.js (Hindi) · @huggingface/transformers · onnxruntime-web · Rust → wasm32 · Bun	shipped

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Yantra — heat sim in a browser tab

cd yantra
bun install
bun dev    # → http://localhost:4321

Then visit /sim?fx=fins. Pick Aluminum, hit Solve, watch the gradient cascade down each fin.

Requires a WebGPU-capable browser (Chrome / Edge / Arc / Brave / Safari 26). Full design + numerics in yantra/README.md.

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Trishul — Claude's body inside your machine

cd trishul
cargo install --path crates/trishul-mcp
trishul-mcp selftest   # every tool should print "ok"

Add to your MCP client config (Claude Desktop, Claude Code, Cursor, …):

{ "mcpServers": { "trishul": { "command": "trishul-mcp" } } }

Restart the client. Ask Claude: "Anything listening on port 5432?" or "Which processes are doing the most file I/O?"

Cross-platform: 6 of 7 tools work identically on Linux, macOS, and Windows. syscall_trace uses eBPF (Linux) / DTrace (macOS) / ETW (Windows) depending on host. Full install + privilege docs in trishul/README.md, trishul/docs/CLAUDE_CONFIG.md, trishul/docs/PRIVILEGES.md, and trishul/docs/EXAMPLES.md.

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Naadi — multiplayer WebGPU shader sandbox

cd naadi
bun install

# Terminal A — tiny signaling server (forwards SDP/ICE only)
bun --filter @naadi/signal dev      # → ws://localhost:3030/ws

# Terminal B — web app
bun dev                              # → http://localhost:4322

Click Create room, share the resulting /r#<id> link with a second browser window. Edits flow over WebRTC DataChannel (zero server bandwidth after handshake); the Loro CRDT keeps everyone in sync; each peer's GPU renders the shared shader independently. Cursors and nicknames sync as ephemeral awareness frames. Snapshots persist to per-browser IndexedDB.

A Preset… dropdown above the editor swaps in bundled shaders (cosine rainbow, plasma, mandelbrot, voronoi, cyberpunk avatar, anime waifu, minecraft planet, hyperspace, …) and a zoom slider in the Canvas pane drives a u.zoom uniform read by the bundled presets (default 1.00×, auto-resets on preset switch).

Requires a WebGPU and WebRTC capable browser — desktop Chrome / Edge / Arc / Brave / Safari 26+. Full design, security model, and config knobs in naadi/README.md.

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Darshan — vision agent in a browser tab

cd darshan
bun install
bun run build:wasm   # one-time: compiles the Rust WASM core (requires wasm32-unknown-unknown)
bun dev              # → http://localhost:4321

Visit /run and pick a pipeline: drop a Devanagari image for OCR + Hindi→English translation, or a dashcam clip for auto-cut incident highlights. Visit /docs for the full walkthrough — concepts (pipeline vs. backend, the seam, worker offload), the pipeline × backend matrix, request flow, and troubleshooting.

The bet: one UI hosts every pipeline on every backend. tesseract.js reads Devanagari + @huggingface/transformers v4 Opus-MT translates Hindi → English; onnxruntime-web runs dashcam YOLO; a Rust crate compiled to wasm32-unknown-unknown (no wasm-bindgen) ships as the seam proof for the future candle-core drop-in. Privacy proof: after first model load, no network traffic — verify in airplane mode. Full design in darshan/README.md and /docs in-app.

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Tech stack signature

• Rust 2024 edition · rmcp 1.7 · aya 0.13 (eBPF, Linux) · ferrisetw 1.2 (ETW, Windows) · tokio · sysinfo · netstat2 · nusb · procfs · nix · candle-core (target wasm32-unknown-unknown, no wasm-bindgen).
• Bun 1.3 workspace · Astro 6.4 · Preact 10 · Three.js 0.184 · Tailwind v4 · CodeMirror 6 · Loro CRDT · WebRTC DataChannel · WebGPU + WGSL · @huggingface/transformers v4 · onnxruntime-web · tesseract.js v7.
• Biome 2 + clippy -D warnings lint-clean.

Build-environment caveat for this checkout: /mnt/shared is mounted noexec, so both subprojects symlink their build dirs (target/, node_modules/.bun/) to /tmp to let native build scripts execute. On a normal filesystem you don't need this hack.

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Repo layout

shastra/
├─ README.md             — this file
├─ .gitignore            — workspace-level
├─ yantra/               — see yantra/README.md
│  ├─ apps/web/          — Astro site + WebGPU sim UI
│  └─ packages/{mesh,solver}/  — STL parse/voxelize + CPU+GPU Jacobi solver
├─ trishul/              — see trishul/README.md
│  └─ crates/{trishul-mcp,trishul-ebpf}/
├─ naadi/                — see naadi/README.md
│  ├─ apps/{web,signal}/ — Astro+Preact room UI + Bun signaling server
│  └─ packages/{doc,net,gpu}/  — Loro+CM binding, WebRTC mesh, WebGPU runtime
└─ darshan/              — see darshan/README.md and /docs in-app
   ├─ apps/web/          — Astro+Preact+Tailwind shell, /run + /docs
   └─ packages/{inference-core,inference-core-wasm,pipeline-ocr,pipeline-dashcam,ui-kit}/

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License

MIT, applies to every subproject in this workspace.

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Why "shastra"

Shastra (शस्त्र / शास्त्र) in Sanskrit covers both instrument / weapon and treatise / discipline / body of knowledge. The first sense reads the workspace as a collection of tools (Yantra = instrument, Trishul = trident — both literal shastras). The second covers anything that's a system of practice (a naadi-shastra is the discipline of pulse diagnosis; naadi itself is the pulse / channel / conduit — fitting for a project where shader bytes flow through WebRTC data channels between peers).