oh-my-pi

The most capable agent surface that ships. Continuously tuned by real-world use — complete out of the box, open all the way down.

60+ providers · 31 built-in tools · 14 lsp ops · 28 dap ops · ~80k lines of Rust core.

[!NOTE] Pull requests are temporarily open to everyone as a trial. We previously required a vouch before accepting PRs; that requirement is lifted for now while we evaluate how open contributions go. Depending on the results, the vouch system may return.

Install

macOS · Linux

curl -fsSL https://omp.sh/install | sh

Without a usable bun (or with --binary), the install scripts fetch the prebuilt binary from build.stencil.so and check its SHA-256 before installing it. Pin a release with curl -fsSL https://omp.sh/install | sh -s -- --binary --ref v<version> (PowerShell: -Binary -Ref v<version>).

Alpine / musl: the prebuilt musl binary links libstdc++/libgcc dynamically, which stock Alpine does not ship. Install them first: apk add libstdc++ libgcc.

Homebrew

brew install can1357/tap/omp

Bun (recommended)

bun install -g @oh-my-pi/pi-coding-agent

Nix

# Run without installing
nix run github:can1357/oh-my-pi

# Or install into the active profile (Nix < 2.30: `nix profile install`)
nix profile add github:can1357/oh-my-pi

Flake consumers can use packages.<system>.omp, overlays.default, nixosModules.default, or homeManagerModules.default. A Home Manager configuration can install OMP and own its settings declaratively:

{
  inputs.omp.url = "github:can1357/oh-my-pi";

  # In your Home Manager module:
  imports = [ inputs.omp.homeManagerModules.default ];
  programs.omp = {
    enable = true;
    settings.startup.quiet = true;
  };
}

Windows (PowerShell)

irm https://omp.sh/install.ps1 | iex

Pinned versions (mise)

mise use -g github:can1357/oh-my-pi

macOS · Linux · Windows · bun ≥ 1.4.4

Shell completions

omp generates its own completion scripts for bash, zsh, and fish from the live command/flag metadata, so they never drift from the actual CLI. Subcommands, flags, and enum values complete statically; model names (--model, --smol, --slow, --plan) resolve against the bundled model catalog and --resume against your on-disk sessions.

# zsh — add to ~/.zshrc (or write the output into a file on your $fpath)
eval "$(omp completions zsh)"

# bash — add to ~/.bashrc
eval "$(omp completions bash)"

# fish
omp completions fish > ~/.config/fish/completions/omp.fish

Every tool, benchmaxxed.

Edits that land on the first attempt. Reads that summarize files instead of dumping their content. Searches that return instantly. Pick any model — omp will get it right.

model	metric	what
Grok Code Fast 1	6.7% → 68.3%	Tenfold lift the moment the edit format stops eating the model alive.
Gemini 3 Flash	+5 pp	Over str_replace — beats Google's own best attempt at the format.
Grok 4 Fast	−61% tokens	Output collapses once the retry loop on bad diffs disappears.
MiniMax	2.1×	Pass rate more than doubles. Same weights, same prompt.

• read : summarized snippets · ideal defaults · selector hit rate
• grep : fastest in the west
• lsp : everything your IDE knows, the agent knows
• prompts : adjusted relentlessly for each model

Read the full post ↗

The Pi you love, with batteries included.

Originally built on Mario Zechner's wonderful Pi, omp adds everything you're missing.

01 · Code execution w/ tool-calling

Most harnesses give the agent a Python sandbox and call it done. Ours runs persistent Python and a Bun worker, and either kernel can call back into the agent's own tools — read, search, task — over a loopback bridge. The agent loads a CSV with tool.read from inside Python, charts it from JavaScript, and never leaves the cell.

02 · LSP wired into every write

Ask for a rename and you get a rename. The call goes through workspace/willRenameFiles, so re-exports, barrel files, and aliased imports update before the file moves. Everything your IDE knows, the agent knows.

Read the LSP config docs

03 · Drives a real debugger

A C binary segfaults: the agent attaches lldb, steps to the bad pointer, reads the frame. A Go service hangs: it attaches dlv and walks the goroutines. A Python process is wedged: debugpy, pause, inspect, evaluate. Most agents are still sprinkling print statements.

Watch the capture ↗

04 · Time-traveling stream rules

Your rules sit dormant until the model goes off-script. A regex match aborts the stream mid-token, injects the rule as a system reminder, and retries from the same point. You get course-correction without paying context tax on every turn. Injections survive compaction, so the fix sticks.

Watch the capture ↗

05 · First-class subagents

Split a job across workers and get typed results back. task fans out into isolated worktrees, each worker runs its own tool surface, and the final yield is a schema-validated object the parent reads directly. No prose to parse, no merge conflicts between siblings, no orphaned edits.

Watch the capture ↗

Watch the fan-out while it runs: Alt+A opens Agent Hub, where the roster shows current activity and usage for every subagent. Open one to read its live transcript, type a steering message, revive a parked worker, or kill a stuck one without aborting the parent session.

06 · A second model, watching every turn.

Pair a reviewer model to the 'advisor' role and it reads every turn the main agent takes, injecting notes inline — a quiet aside, a concern, or a hard blocker. It runs on its own context and its own model, so it catches what the doer rushed past. The main agent sees the note and course-corrects, or tells you why it won't.

Watch the capture ↗

07 · Hand someone the link, they're in.

/collab puts your live session on a relay and hands back a link — and a QR. A teammate joins from another terminal with omp join, or just opens it in a browser. Share read-write to pair on the same agent, or /collab view for a read-only link anyone can watch but no one can steer. Frames are sealed client-side; the relay never sees your keys.

Watch the capture ↗

08 · Read a pdf on arxiv, why not?

web_search chains twenty-four ranked providers and hands whatever URLs it finds straight to read. Arxiv PDFs, GitHub pages, Stack Overflow threads come back as structured markdown with anchors intact — the same tool surface you use on local files. Cite, follow, quote, never lose where you came from.

Watch the capture ↗

09 · Unapologetically native. Even on Windows.

Other agents shell out to rg, grep, find, and bash. On many machines those binaries don't exist, and on the ones where they do, every call costs a fork-exec round-trip. omp links the real implementations into the process. ripgrep, glob, find: in-process. The bash is our own bash 5.3 engine — with sessions that survive across calls, and 58 command-line utilities (ls, sed, sort, xargs, even jq) ported into the builtins crate and run in-process, zero fork/exec. The same omp binary runs on macOS, Linux, and Windows — no WSL bridge.

10 · Code review with priorities and a verdict

Get a clear verdict on whether the change ships, with every issue ranked P0 through P3 and scored for confidence. /review spawns dedicated reviewer subagents that sweep branches, single commits, or uncommitted work in parallel. You tackle what blocks release first; nothing important hides in a wall of prose.

Want to steer the review yourself? /annotate code-review opens the diff so you can pin notes to lines before the reviewers run. /annotate also takes the latest reply, a session message, a file, or quoted text and pastes your notes into the prompt. See /annotate.

11 · Hashline: edit by content hash

Perfect edits, fewer tokens. The model points at anchors instead of retyping the lines it wants to change, so whitespace battles and string-not-found loops just stop happening. Edit a stale file and the anchors diverge — we reject the patch before it corrupts anything. Grok 4 Fast spends 61% fewer output tokens on the same work.

12 · GitHub is just another filesystem

Other harnesses bolt on gh_issue_view, gh_pr_view, gh_search — each with its own parameters the agent has to learn and you have to debug. We skipped that. read already handles paths; PRs are paths. One interface to teach the model, one surface to keep correct.

13 · Memory the agent curates

The agent remembers your codebase between sessions. It writes facts mid-run with retain, captures reusable lessons with learn, pulls them back with recall, and compresses each session into a mental model that loads on the first turn of the next one. Pick the engine with memory.backend — local, Hindsight, or Mnemopi. Project-scoped by default, so what it learns about this repo stays with this repo.

14 · ACP: editor-drivable agent

Run omp inside Zed and you get the same agent you drive from the terminal — reading the buffer you're actually looking at, writing through the editor's save path, spawning shells in the editor's terminal. Destructive tools pause for a permission prompt you can answer once and forget. No bridge, no plugin, no second brain to keep in sync.

15 · Inherits what your other tools already wrote

Every other agent ships an importer and expects you to convert. omp reads the eight formats already on disk in their native shape — Cursor MDC, Cline .clinerules, Codex AGENTS.md, Copilot applyTo, and the rest. No migration script, no YAML-to-TOML port, no "supported subset" footnotes. The config your team wrote last quarter still works tonight.

16 · omp commit: atomic splits, validated messages

omp reads the working tree through git_overview, git_file_diff, and git_hunk, then splits unrelated changes into atomic commits ordered by their dependencies. Cycles are rejected before anything is written. Source files score above tests, docs, and configs, so the headline commit is the one that matters. Lock files are excluded from analysis entirely.

17 · Read PRs. Walk skills. Pull JSON out of subagents.

Sixteen internal schemes — pr://, issue://, agent://, skill://, ssh://, and the rest — resolve transparently inside every FS-shaped tool the agent already calls. read pr://1428 returns the same shape as read src/foo.ts. grep walks a diff like a directory. agent://<id>/findings.0.path pulls a field out of a subagent's output by path.

18 · Conflict resolution, made easy.

Each merge conflict becomes one URL. The agent writes @theirs, @ours, or @base to conflict://N and the file resolves cleanly. Bulk form: conflict://*.

Watch the capture ↗

19 · Preview, then accept.

ast_edit returns a (proposed) card with the replacement count. The change is staged. The agent writes a one-line reason to xd://resolve; the TUI turns it into an Accept card and the disk move happens — atomic, all or nothing.

Watch the capture ↗

20 · Drives a real browser. Or your Slack?

Eval's browser.open(...) returns a tab handle with direct navigation, inspection, interaction, and element helpers; tab.run(...) handles custom JavaScript. It drives Chromium or Electron in an isolated tab runtime. Stealth is on by default, while the browser relay can adopt Chrome tabs you already have open without stealing focus.

21 · Hands on the desktop itself

Eval's computer helpers — computer.window(...), win.screenshot(), win.ax(), el.press(), plus computer.run(fnOrCode, options) for multi-step scripts — control the real host: enumerate windows and displays, capture screenshots, send native input, walk the OS accessibility tree, and use the clipboard. It exposes no browser DOM.

Whatever the task needs, it's already in the box.

Core tools live in the same namespace as read and bash. Pin the active set with --tools read,edit,bash,…; rarely used discoverable tools stay behind xd:// devices. read xd:// lists them, and write xd://<tool> runs one when tools.xdev is enabled.

Files & search

• read — files, dirs, archives, SQLite, PDFs, notebooks, URLs, remote ssh:// paths, and internal :// schemes through one path.
• write — create or overwrite a file, archive entry, or SQLite row.
• edit — hashline patches with content-hash anchors and stale-anchor recovery.
• ast_edit — structural rewrites previewed before apply, via ast-grep.
• ast_grep — structural code queries over 50+ tree-sitter grammars.
• grep — regex over files, globs, and internal URLs.
• glob — glob-based path lookup; reach for grep when you need content matches.

Runtime

• bash — workspace shell with 46 in-process coreutils, optional PTY, and background-job dispatch.
• eval — persistent Python and JavaScript cells with shared prelude and tool re-entry.

Code intelligence

• lsp — diagnostics, navigation, symbols, renames, code actions, raw requests.
• debug — drive a DAP session — breakpoints, stepping, threads, stack, variables.
• security_scan — plan and run native security reviews; drives Codex Security cloud scans.

Coordination

• task — fan out subagents in parallel, optionally workspace-isolated.
• wait — block until the next background result, peer message, or steering interrupt; message peers and control jobs via agent:// and proc://.
• todo — ordered mutations over the session todo list with phase tracking.
• ask — structured follow-up questions for interactive runs.

Desktop & web

• browser — Puppeteer tabs over headless Chromium, CDP-attached apps, or your own Chrome via the relay.
• computer — persistent JS against the host desktop: windows, screenshots, native input, AX tree, clipboard.
• web_search — one query across configured providers, returning answer plus citations.
• github — GitHub CLI ops — repo, PR, issues, code search, Actions run-watch.
• generate_image — generate or edit raster images via Gemini, GPT, or xAI Grok image models.
• tts — text-to-speech via xAI Grok Voice — five built-in voices, WAV or MP3.

Memory & skills

• checkpoint — mark conversation state for a later collapse-and-report.
• rewind — prune exploratory context, keep a concise report.
• retain — queue durable facts into the active memory bank.
• recall — search the memory bank for raw memories.
• reflect — synthesize an answer over the bank.
• memory_edit — update, forget, or invalidate stored memories by id.
• learn — capture a reusable lesson; optionally promote it into a managed skill.
• manage_skill — create, update, or delete an isolated managed skill.

Setting-gated, off by default: github, security_scan, generate_image, tts, checkpoint, rewind, and the memory tools (retain/recall/reflect/memory_edit, per memory.backend).

Full reference →

Prompt controls

Standalone, lowercase words opt a turn into specialized agent behavior:

• ultrathink — request careful multi-step reasoning and the highest supported automatic thinking effort.
• chillax — request brief reasoning; on models with per-message effort, drop thinking to the lowest effort, even mid-turn.
• orchestrate — run substantial independent work through parallel subagents and verify each phase.
• workflowz — build a deterministic multi-subagent workflow with the active task tool.

They trigger only in prose, not inside code spans, fenced code blocks, XML/HTML sections, identifiers, or paths. See Magic keywords for exact matching rules and configuration.

Session controls

Slash commands shift how a whole session runs:

• /vibe — enter Vibe mode: act as a director driving persistent fast/good worker sessions with a read-only toolset.
• /fresh — reset the provider stream state (stale prompt cache, wedged stream) without changing the local transcript. See Session operations.

Sixty-plus providers, a thousand models, one /model away.

Nine roles route work by intent. default for normal turns. smol for cheap subagent fan-out. slow for deep reasoning. plan for plan mode. commit for changelogs. Plus vision, task, advisor, and tiny for their namesakes. Override at launch with --smol, --slow, or --plan; cycle through the configured models for the active role with Ctrl+P. Swap the active model mid-session with the /model slash command.

Auth tags below: oauth signs in with your provider account, plan routes through a coding-plan subscription, local runs against a local server with the key optional.

Frontier APIs

Direct APIs and gateways. Mix providers per role.

Anthropic oauth · OpenAI · OpenAI Codex oauth · Google Gemini · Google Vertex · Google Antigravity oauth · xAI · SuperGrok oauth · DeepSeek · Mistral · Groq · Cerebras · SambaNova · Fireworks · Together · Modular · Baseten · DeepInfra · Hugging Face · NVIDIA · Meta · Inception · Amazon Bedrock · Azure OpenAI · SiliconFlow · GMI Cloud · CoreWeave · Sakana AI · Command Code · Charm Hyper · StepFun · Helmcode · OpenRouter · Synthetic · Vercel AI Gateway · Cloudflare AI Gateway · Wafer Serverless · Scaleway

Coding plans

Subscription-routed. /login attaches the session.

Cursor oauth · GitHub Copilot oauth · GitLab Duo · Devin oauth · Kimi Code plan · Moonshot · MiniMax Coding Plan plan · MiniMax Coding Plan CN plan · Alibaba Coding Plan plan · Qwen Portal oauth · Z.AI / GLM Coding Plan plan · Zhipu Coding Plan plan · Xiaomi MiMo · Qianfan · Umans plan · NanoGPT · Novita · Venice · Kilo · ZenMux · OpenCode Go · OpenCode Zen

Run it yourself

OpenAI-compatible /v1/models. Local instances skip the key.

Ollama local · Ollama Cloud · LM Studio local · llama.cpp local · vLLM local · LiteLLM

Custom OpenAI-compatible providers

Define custom providers in ~/.omp/agent/models.yml:

providers:
   spark:
      baseUrl: http://192.168.10.223:8000/v1
      api: openai-completions
      apiKey: dummy
      models:
         - id: minimax-m3
           name: MiniMax M3
           contextWindow: 100000
           maxTokens: 32000

Run omp models spark to verify discovery. Then run omp setup and choose the model in the default-model step, or open /model in a session and assign it to the default role.

To preconfigure the default without the picker, add the selector to ~/.omp/agent/config.yml:

modelRoles:
   default: spark/minimax-m3

Four knobs that make routing useful

• Custom providers — Declare anything that speaks openai-completions, openai-responses, openai-codex-responses, azure-openai-responses, anthropic-messages, bedrock-converse-stream, google-generative-ai, google-gemini-cli, google-vertex, typesafe, openrouter-decisions, openai-decisions, or workers-ai-systemone (the judge APIs) in ~/.omp/agent/models.yml.
• Fallback chains — Per-role or per-model chains under retry.fallbackChains. When the primary throws 429s or hits a quota wall, the next entry takes the rest of the turn — restored on cooldown.
• Path-scoped models — Scope enabledModels and disabledProviders entries to a path: prefix to pin a different model set on one repo without touching the global config. Scoped entries cover the path and everything under it.
• Round-robin credentials — Stack API keys per provider and the runtime rotates with session affinity and per-credential backoff. Useful when one key would burn its quota by lunch.

Full provider & routing reference at omp.sh/docs/providers.

Twenty-four backends. One tool the agent already knows.

web_search is built in, not bolted on. auto walks a twenty-four-provider chain; pin one by name if you already pay for it. Behind every hit, site-aware extraction turns GitHub, registries, arXiv, Stack Overflow, and docs into structured markdown — anchors and link targets survive.

Search providers

Twenty-four backends. Pin one, or let auto walk the chain in order.

provider	auth
auto	chain
perplexity	PERPLEXITY_API_KEY (anonymous fallback)
gemini	oauth
anthropic	oauth
codex	oauth
xai	oauth or XAI_API_KEY
zai	ZAI_API_KEY
exa	EXA_API_KEY (or mcp)
tinyfish	TINYFISH_API_KEY
keenable	KEENABLE_API_KEY (keyless fallback)
jina	JINA_API_KEY
kagi	KAGI_API_KEY
tavily	TAVILY_API_KEY
firecrawl	FIRECRAWL_API_KEY (keyless fallback)
brave	BRAVE_API_KEY
kimi	/login kimi-code or search key
parallel	PARALLEL_API_KEY
synthetic	SYNTHETIC_API_KEY
searxng	self-hosted
duckduckgo	no key
startpage	no key
google	no key (browser)
ecosia	no key (browser)
mojeek	no key (browser)
public	no key (all of the above, consolidated)

Exa also accepts a stored API key through /login exa; explicit keyless selection uses the public MCP fallback.

Specialised handlers

The agent gets structured content, not stripped HTML.

• Code hosts — github, gitlab
• Package registries — npm, PyPI, crates.io, Hex, Hackage, NuGet, Maven, RubyGems, Packagist, pub.dev, Go packages
• Research sources — arxiv, semantic scholar
• Forums — stack overflow, reddit, hn
• Docs — mdn, readthedocs, docs.rs

Pages convert to markdown with link structure intact. The agent can cite, follow, and quote without losing anchors.

Security databases

Vuln lookups answer with vendor data, not blog summaries.

• NVD — national vulnerability database
• OSV — open source vuln feed
• CISA KEV — known exploited vulns

web_search reference ↗

Roughly ~80,000 lines of Rust, doing the work other harnesses shell out for.

Six crates, one platform-tagged N-API addon. Search, shell, AST, highlight, PTY, desktop control, image decode, BPE counting — all in-process on the libuv pool. No fork/exec on the hot path. The shell is our own bash 5.3 engine, and 58 command-line utilities — coreutils, findutils, sed, jq, ripgrep-backed grep, fd, diff, moreutils — are ported into the builtins crate and compiled straight into the shell.

• Crates: pi-natives, pi-shell, pi-ast, pi-iso, pi-voice, pi-walker
• Platforms: linux-x64, linux-arm64, darwin-x64, darwin-arm64, win32-x64, win32-arm64 — x64 ships dual AVX2 and baseline binaries

Per crate, code lines only:

Crate	What it does	~LoC
pi-shell	Embedded bash engine · persistent sessions · in-process coreutils dispatch · minimizer	38,000
pi-natives	The N-API surface — every module in the table below	25,000
pi-walker	Parallel walker · listing cache · glob · regex search for natives and shell rg/grep/fd	11,400
pi-iso	Workspace isolation · apfs · btrfs · zfs · reflink · overlayfs · projfs · rcopy	3,300
pi-ast	tree-sitter + ast-grep matching, block resolution, structural summaries	2,900
pi-voice	Audio capture/playback · Opus · live WebRTC	1,000

Inside pi-natives, the per-module breakdown (glue and tests omitted):

Module	What it does	Powered by	~LoC
desktop	Window/display enumeration · screenshot · native input · AX tree for computer	xcap · enigo · OS AX FFI	10,600
grep	Regex search · parallel/sequential · glob & type filters · fuzzy find	grep-regex · grep-searcher	3,280
text	ANSI-aware width · truncation · column slicing · SGR-preserving wrap	unicode-width · segmentation	2,070
snapcompact	Bitmap-frame rasterization + PNG encode for context compression	image · png	1,760
keys	Kitty keyboard protocol with xterm fallback · PHF perfect-hash lookup	phf	1,740
ast	ast-grep pattern matching and structural rewrites	ast-grep-core	1,510
diff	Structured file diffing for tools and previews	in-tree	1,030
pty	Native PTY allocation for sudo · ssh interactive prompts	portable-pty	630
crash_handler	Native crash capture and reporting	in-tree	610
highlight	Syntax highlighting · 11 semantic categories · 30+ aliases	syntect	550
appearance	Mode 2031 + native macOS dark/light via CoreFoundation FFI	core-foundation	450
task	Blocking work on libuv thread pool · cancellation · timeout · profiling	tokio · napi	440
glob	Discovery with glob · type filters · mtime sort · gitignore respect	ignore · globset	430
fd	Filesystem walker for find-tool replacement	ignore	385
clipboard	Text copy and image read from system clipboard · no xclip/pbcopy	arboard	370
workspace	Workspace walker with gitignore + AGENTS.md discovery in one pass	ignore	275
power	macOS power-assertion API for idle/system/display-sleep prevention	IOKit FFI	270
prof	Circular buffer profiler with folded-stack and SVG flamegraph output	inferno	240
file_lock	Cross-process advisory file locking	in-tree	210
ps	Cross-platform process-tree kill and descendant listing	libc · libproc · CreateToolhelp32Snapshot	195
tokens	O200k / Cl100k BPE token counting · both tables embedded	tiktoken-rs	70
html	HTML to Markdown with optional content cleaning	html-to-markdown-rs	60
sixel	Terminal image rendering · decode PNG · JPEG · WebP · GIF · resize · SIXEL encode	icy_sixel · image	55

Four entry points: interactive, one-shot, RPC, and ACP.

Same engine, four wrappers. omp runs the TUI. omp -p answers a single prompt and exits. The Node SDK embeds the session in your process. omp --mode rpc and omp acp hand the wheel to another program over stdio.

Interactive — when in doubt, the agent asks

The TUI is the default surface. Tool calls render as cards, edits preview before they land, and ambiguity routes through the ask tool — a structured option picker the agent can call mid-turn. The keyboard handles the rest.

The same prompt cards surface over ACP, so editors get the picker without writing one.

SDK — embed in Node

@oh-my-pi/pi-coding-agent

Node and TypeScript hosts pull the engine in directly. The package exposes ModelRegistry, SessionManager, createAgentSession, and discoverAuthStorage; the session emits typed events you subscribe to.

import { ModelRegistry, SessionManager, createAgentSession, discoverAuthStorage } from "@oh-my-pi/pi-coding-agent";

const auth = await discoverAuthStorage();
const models = new ModelRegistry(auth);
await models.refresh();

const { session } = await createAgentSession({
	sessionManager: SessionManager.inMemory(),
	authStorage: auth,
	modelRegistry: models,
});
await session.prompt("list .ts files");

RPC — drive over stdio

omp --mode rpc

For non-Node embedders, or when you want process isolation. NDJSON commands in, response and event frames out; each prompt ends with its own prompt_result. --mode rpc-ui adds tool cards, selectors, and dialogs as extension_ui_request frames the host must answer; --no-ui keeps even extension dialogs off the wire for hosts with no UI.

$ omp --mode rpc --no-session
> {"id":"r1","type":"prompt","message":"list .ts files"}
< {"id":"r1","type":"response", ...}
> {"id":"r2","type":"set_model","provider":"anthropic","modelId":"sonnet-4.5"}
> {"id":"r3","type":"abort"}

ACP — speak to editors

omp acp

The Agent Client Protocol over JSON-RPC. When the editor advertises capabilities, tool I/O routes through it and writes are gated by session/request_permission.

omp tool	ACP route
bash	terminal/create + terminal/output
read	fs/read_text_file
write	fs/write_text_file
edit, bash	session/request_permission

Full reference: omp.sh/docs/sdk.

A harness worth keeping is one you don't outgrow.

Pick it up at omp.sh.

omp is a fork of Pi by Mario Zechner, rewritten as a coding-first surface: sessions, subagents, slash commands, extensions — all TypeScript, all MIT, all on GitHub. Shape it from config, hook it from outside, or read the source when you need to.

Primitives

An extension is a TypeScript module. Same tool API, same slash-command registry, same hotkey table, same TUI primitives the built-ins use. Nothing is reserved.

Discovery

On first run omp inherits whatever is already on disk: rules, skills, and MCP servers from .claude, .cursor, .windsurf, .gemini, .codex, .cline, .github/copilot, and .vscode. No migration script.

Extensibility

Ask omp to write the piece you're missing, then /reload-plugins. Keep it local, ship it in a marketplace, or publish it to npm.

Philosophy

omp is a fork of pi-mono by Mario Zechner, extended with a batteries-included coding workflow.

Key ideas:

• Keep interactive terminal-first UX for real coding work
• Include practical built-ins (tools, sessions, branching, subagents, extensibility)
• Make advanced behavior configurable rather than hidden

Project inputs and trust

Opening a repository loads its project inputs by design: settings, extensions, hooks, tools, commands, skills, rules, and project MCP configuration. To exclude project .mcp.json for one invocation, pass --config <file> pointing at a YAML overlay with nested keys (a flat mcp.enableProjectConfig: false line is ignored):

mcp:
   enableProjectConfig: false

Use --no-extensions to skip ambient extension discovery; or use --trusted-extension /absolute/path/to/file.ts for an exact extension allowlist. --no-tools disables built-in tools, but project tool modules remain a separate discovery surface. These flags narrow inputs without changing the repository-trust model.

---

Development

Getting started from source

Fresh clones need both workspace dependencies and the local Rust/N-API addon before the source CLI can start.

bun setup
bun dev

bun setup installs Bun workspaces and builds @oh-my-pi/pi-natives. Re-run bun run build:native after changing Rust crates or packages/natives.

Nix users get the pinned Bun and Rust toolchains plus all native build dependencies:

nix develop
bun setup
bun dev

Build and smoke-test the distributable Nix package with nix build .#omp. Wayland screencast support is off by default (linking libpipewire adds ~750 MB of runtime closure); enable it with omp.override { withWaylandScreencast = true; }. Release builds link pi-natives with fat LTO; omp.override { withFatLto = false; } uses thin LTO for much faster local rebuilds. Rust dependencies and the native addon build in separate derivations, so Rust edits reuse compiled dependencies and TypeScript edits reuse the addon. nix/bun.nix is generated only when bun.lock changes; releases regenerate it automatically. For dependency changes, run:

bun run gen:nix

The command uses bun2nix from nix develop when available, otherwise enters the development shell through Nix, then falls back to the pinned bunx [email protected]. Do not edit nix/bun.nix manually.

For a non-interactive smoke check:

bun dev -- --version

Debug Command

/debug opens tools for debugging, reporting, and profiling.

For architecture and contribution guidelines, see packages/coding-agent/DEVELOPMENT.md.

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Monorepo Packages

Package	Description
@oh-my-pi/collab-web	Browser guest client, mock host, and local relay for collab live sessions
@oh-my-pi/pi-ai	Multi-provider LLM client with streaming and model/provider integration
@oh-my-pi/pi-catalog	Model catalog: bundled model database, provider descriptors, and identity
@oh-my-pi/pi-agent-core	Agent runtime with tool calling and state management
@oh-my-pi/pi-coding-agent	Interactive coding agent CLI and SDK
@oh-my-pi/pi-tui	Terminal UI library with differential rendering
@oh-my-pi/pi-natives	N-API bindings for grep, shell, image, text, syntax highlighting, and more
@oh-my-pi/omp-stats	Local observability dashboard for AI usage statistics
@oh-my-pi/omptype	ArkType-compatible schema validation with lazy JIT compilation
@oh-my-pi/pi-utils	Shared utilities (logging, streams, dirs/env/process helpers)
@oh-my-pi/pi-wire	Shared collab live-session protocol types and relay constants
@oh-my-pi/pi-mnemopi	Local SQLite memory engine for omp agents
@oh-my-pi/snapcompact	Bitmap-frame context compression package and SQuAD eval suite
@oh-my-pi/browser-relay	Chrome extension that lets the Eval browser API drive your existing tabs
@oh-my-pi/pi-metaharness	Unified benchmark runners, Harbor run storage, REST/SSE API, live dashboard
@oh-my-pi/typescript-edit-benchmark	Edit benchmark suite built on TypeScript source mutations

Rust Crates

Crate	Description
pi-natives	Core Rust native addon (N-API cdylib) used by @oh-my-pi/pi-natives; aggregates the crates below
pi-shell	Embedded bash 5.3 engine (parser, VM, process spawning, sessions), PTY, and process management
pi-ast	tree-sitter-based code summarizer and AST utilities (50+ language grammars)
pi-iso	Task isolation backend resolver: APFS clones, btrfs/zfs reflinks, overlayfs, projfs, rcopy
pi-voice	Audio capture/playback, Opus codecs, and live WebRTC streaming primitives
pi-walker	Parallel ignore-aware walker, directory-listing cache, glob, and content search for natives + shell
pi-edit	Edit engine behind the edit tool: line-anchored patch/hashline modes, streaming previews, atomic apply
pi-builtins	67 in-process command-line utilities plus process builtins (ps, top, pgrep, pkill, …)

Contributing

Issues and pull requests are open to everyone. Open PRs are currently a trial — the previous vouch requirement is lifted while we evaluate how it goes, and it may return. See CONTRIBUTING.md for guidelines on contributing.

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License

OMP is licensed under the MIT License.

Third-party and vendored code, including the third-party portions identified in crates/pi-builtins/LICENSE, remains under its respective upstream license. Each shipped component carries its own THIRD-PARTY-NOTICES.txt: the CLI (packages/coding-agent), the native addon (packages/natives), and robomp (python/robomp). omp --license prints the CLI's and the addon's.

© 2025 Mario Zechner
© 2025-2026 Can Bölük
© 2026 Stencil Labs, Inc.

made for terminals that stay open

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