forkd

Name: forkd
Author: deeplethe

bydeeplethe· 1 MCP server

Stars

2.7k

Forks

212

How to install forkd?

deeplethe/forkd

$git clone https://github.com/deeplethe/forkd

Installs into the current project.

›Prefer a prompt? Paste this to your agent

Install & use

Install forkd by running `git clone https://github.com/deeplethe/forkd`, then use it for the current task and follow its documentation at https://github.com/deeplethe/forkd.

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README.md

1	<br/>
2
3	<div align="center">
4	<picture>
5	<source media="(prefers-color-scheme: dark)" srcset="docs/logo-dark.svg">
6	<img alt="forkd" src="docs/logo.svg" width="220">
7	</picture>
8	</div>
9
10	<br/>
11	<br/>
12
13	<p align="center">
14	<a href="https://github.com/deeplethe/forkd/actions"><img alt="CI" src="https://img.shields.io/github/actions/workflow/status/deeplethe/forkd/ci.yml?branch=main&style=flat-square&label=ci"></a>
15	<a href="https://github.com/deeplethe/forkd/releases"><img alt="Release" src="https://img.shields.io/github/v/release/deeplethe/forkd?style=flat-square&color=4c956c"></a>
16	<a href="https://pypi.org/project/forkd/"><img alt="PyPI" src="https://img.shields.io/pypi/v/forkd?style=flat-square&color=3776ab&logo=pypi&logoColor=white"></a>
17	<a href="./LICENSE"><img alt="License" src="https://img.shields.io/badge/license-Apache--2.0-blue?style=flat-square"></a>
18	<a href="./README-zh.md"><img alt="中文 README" src="https://img.shields.io/badge/README-%E4%B8%AD%E6%96%87-red?style=flat-square"></a>
19	<a href="https://github.com/deeplethe/forkd/stargazers"><img alt="Stars" src="https://img.shields.io/github/stars/deeplethe/forkd?style=flat-square&color=eab308&logo=github"></a>
20	</p>
21
22	<br/>
23
24	## Fork 100 microVMs in 101 ms. BRANCH a live VM in 56 ms (v0.4 live mode).
25
26	<div align="center">
27	<img alt="forkd: pull a portable snapshot from the hub, then fork 100 microVMs" src="docs/assets/quickstart-fork-100.gif" width="760">
28	<br/>
29	<em>Unedited: `forkd pull` a portable snapshot, then fork 100 microVMs — 100/100 alive, ~200 ms wall-clock. <a href="docs/assets/quickstart-fork-100.cast">asciicast</a>. (First pull also fetches the rootfs sidecar once; cached here.)</em>
30	</div>
31
32	<br/>
33
34	A microVM sandbox runtime for AI agent fan-out. Children fork
35	from a warmed parent snapshot, inheriting its address space
36	copy-on-write instead of cold-booting their own kernel.
37
38	forkd is built on Firecracker. The parent VM boots once, imports
39	your runtime (Python + your dependencies, a JIT-warmed JVM, an
40	already-loaded ML model) and is paused to disk. Each child is a
41	separate Firecracker process that `mmap`s the parent's memory image
42	with `MAP_PRIVATE`; the kernel implements copy-on-write at the page
43	level, so children share the parent's resident memory until they
44	diverge.
45
46	The result is two properties at once: per-child KVM isolation, and a
47	spawn cost that's closer to `fork(2)` than to a cold-boot VM.
48
49	forkd also supports BRANCH: pause a running sandbox, snapshot its
50	in-flight state, and resume — all in ~150 ms — so an agent can fork
51	mid-thought, not only at warm-up. v0.3.4 fixed a slow-path regression
52	where repeated BRANCHes on the same parent ballooned from 150 ms to
53	2.7 s ([#146](https://github.com/deeplethe/forkd/issues/146)); the
54	chain now stays flat (17.6× faster on the 6th consecutive BRANCH).
55
56	v0.4 live BRANCH collapses the source-pause window from ~200 ms
57	(Diff) to 56 ms p50 / 64 ms p90 on a 1.5 GiB source — measured
58	on a real BRANCH workload, [`bench/live-fork-pause-window/RESULTS-v0.4.md`](./bench/live-fork-pause-window/RESULTS-v0.4.md).
59	3.6× faster pause vs v0.3 Diff at p50, and the gap widens on
60	slower storage because Live's pause is disk-independent (memory
61	copy runs after resume, not during). With `wait: false` the caller
62	returns in ~70 ms while the background copy completes asynchronously
63	— a 200× RT improvement for fire-and-forget BRANCH from agent
64	code. Pass `--live` / `--no-wait` on the CLI, `mode: "live"` /
65	`wait: false` on REST, or the same on the Python / TypeScript / MCP
66	SDKs.
67
68	```python
69	from forkd import Controller
70	c = Controller()
71	# Source must boot with live_fork=True (memfd-backed RAM, the prereq
72	# for UFFD_WP to see writes from the running parent).
73	parent = c.spawn_sandboxes("pyagent", n=1, live_fork=True)[0]
74	# ... drive parent ... then BRANCH live + fire-and-forget:
75	branch = c.branch_sandbox(parent["id"], mode="live", wait=False)
76	# Returns after ~10 ms with status="writing"; poll list_sna

6 picks

Type

forkd

bydeeplethe· 1 MCP server

Stars

2.7k

Forks

212

How to install forkd?

deeplethe/forkd

$git clone https://github.com/deeplethe/forkd

Installs into the current project.

›Prefer a prompt? Paste this to your agent

Install & use

Install forkd by running `git clone https://github.com/deeplethe/forkd`, then use it for the current task and follow its documentation at https://github.com/deeplethe/forkd.

Files · 1

View on GitHub

README.md

1	<br/>
2
3	<div align="center">
4	<picture>
5	<source media="(prefers-color-scheme: dark)" srcset="docs/logo-dark.svg">
6	<img alt="forkd" src="docs/logo.svg" width="220">
7	</picture>
8	</div>
9
10	<br/>
11	<br/>
12
13	<p align="center">
14	<a href="https://github.com/deeplethe/forkd/actions"><img alt="CI" src="https://img.shields.io/github/actions/workflow/status/deeplethe/forkd/ci.yml?branch=main&style=flat-square&label=ci"></a>
15	<a href="https://github.com/deeplethe/forkd/releases"><img alt="Release" src="https://img.shields.io/github/v/release/deeplethe/forkd?style=flat-square&color=4c956c"></a>
16	<a href="https://pypi.org/project/forkd/"><img alt="PyPI" src="https://img.shields.io/pypi/v/forkd?style=flat-square&color=3776ab&logo=pypi&logoColor=white"></a>
17	<a href="./LICENSE"><img alt="License" src="https://img.shields.io/badge/license-Apache--2.0-blue?style=flat-square"></a>
18	<a href="./README-zh.md"><img alt="中文 README" src="https://img.shields.io/badge/README-%E4%B8%AD%E6%96%87-red?style=flat-square"></a>
19	<a href="https://github.com/deeplethe/forkd/stargazers"><img alt="Stars" src="https://img.shields.io/github/stars/deeplethe/forkd?style=flat-square&color=eab308&logo=github"></a>
20	</p>
21
22	<br/>
23
24	## Fork 100 microVMs in 101 ms. BRANCH a live VM in 56 ms (v0.4 live mode).
25
26	<div align="center">
27	<img alt="forkd: pull a portable snapshot from the hub, then fork 100 microVMs" src="docs/assets/quickstart-fork-100.gif" width="760">
28	<br/>
29	<em>Unedited: `forkd pull` a portable snapshot, then fork 100 microVMs — 100/100 alive, ~200 ms wall-clock. <a href="docs/assets/quickstart-fork-100.cast">asciicast</a>. (First pull also fetches the rootfs sidecar once; cached here.)</em>
30	</div>
31
32	<br/>
33
34	A microVM sandbox runtime for AI agent fan-out. Children fork
35	from a warmed parent snapshot, inheriting its address space
36	copy-on-write instead of cold-booting their own kernel.
37
38	forkd is built on Firecracker. The parent VM boots once, imports
39	your runtime (Python + your dependencies, a JIT-warmed JVM, an
40	already-loaded ML model) and is paused to disk. Each child is a
41	separate Firecracker process that `mmap`s the parent's memory image
42	with `MAP_PRIVATE`; the kernel implements copy-on-write at the page
43	level, so children share the parent's resident memory until they
44	diverge.
45
46	The result is two properties at once: per-child KVM isolation, and a
47	spawn cost that's closer to `fork(2)` than to a cold-boot VM.
48
49	forkd also supports BRANCH: pause a running sandbox, snapshot its
50	in-flight state, and resume — all in ~150 ms — so an agent can fork
51	mid-thought, not only at warm-up. v0.3.4 fixed a slow-path regression
52	where repeated BRANCHes on the same parent ballooned from 150 ms to
53	2.7 s ([#146](https://github.com/deeplethe/forkd/issues/146)); the
54	chain now stays flat (17.6× faster on the 6th consecutive BRANCH).
55
56	v0.4 live BRANCH collapses the source-pause window from ~200 ms
57	(Diff) to 56 ms p50 / 64 ms p90 on a 1.5 GiB source — measured
58	on a real BRANCH workload, [`bench/live-fork-pause-window/RESULTS-v0.4.md`](./bench/live-fork-pause-window/RESULTS-v0.4.md).
59	3.6× faster pause vs v0.3 Diff at p50, and the gap widens on
60	slower storage because Live's pause is disk-independent (memory
61	copy runs after resume, not during). With `wait: false` the caller
62	returns in ~70 ms while the background copy completes asynchronously
63	— a 200× RT improvement for fire-and-forget BRANCH from agent
64	code. Pass `--live` / `--no-wait` on the CLI, `mode: "live"` /
65	`wait: false` on REST, or the same on the Python / TypeScript / MCP
66	SDKs.
67
68	```python
69	from forkd import Controller
70	c = Controller()
71	# Source must boot with live_fork=True (memfd-backed RAM, the prereq
72	# for UFFD_WP to see writes from the running parent).
73	parent = c.spawn_sandboxes("pyagent", n=1, live_fork=True)[0]
74	# ... drive parent ... then BRANCH live + fire-and-forget:
75	branch = c.branch_sandbox(parent["id"], mode="live", wait=False)
76	# Returns after ~10 ms with status="writing"; poll list_sna

6 picks

Type

forkd

How to install forkd?

Related

forkd

How to install forkd?

Related