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deeplethe/forkd
Fork() for AI agent microVMs. Spawn 100 children in ~100ms from a warm parent; BRANCH a live VM in ~150ms. KVM-isolated, snapshot CoW.
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Fork() for AI agent microVMs. Spawn 100 children in ~100ms from a warm parent; BRANCH a live VM in ~150ms. KVM-isolated, snapshot CoW.
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Deep-Dive FAQs
What is deeplethe/forkd?
deeplethe/forkd is a digital product or tool described as: Fork() for AI agent microVMs. Spawn 100 children in ~100ms from a warm parent; BRANCH a live VM in ~150ms. KVM-isolated, snapshot CoW.
Where did deeplethe/forkd originate?
Data for deeplethe/forkd was aggregated directly from the GitHub Open Source community ecosystem, representing raw developer and early-adopter sentiment.
When was deeplethe/forkd publicly launched?
The initial public indexing or launch date for deeplethe/forkd within our tracked developer communities was recorded on May 11, 2026.
How popular is deeplethe/forkd?
deeplethe/forkd has achieved measurable traction, logging over 679 traction score and facilitating 47 recorded discussions or engagements.
Which technical categories define deeplethe/forkd?
Based on metadata extraction, deeplethe/forkd is categorized under topics such as: ai-agents, copy-on-write, kvm, microvm.
Are there active development issues for deeplethe/forkd?
Yes, we are currently tracking open architectural debates and bug reports for this project on GitHub. There are currently 5 active high-priority issues logged recently.
How does the creator describe deeplethe/forkd?
The original author or development team describes the product as follows: "Fork() for AI agent microVMs. Spawn 100 children in ~100ms from a warm parent; BRANCH a live VM in ~150ms. KVM-isolated, snapshot CoW."
Active Developer Issues (GitHub)
Logged: May 18, 2026
Logged: May 12, 2026
Logged: May 11, 2026
Logged: May 11, 2026
Logged: May 11, 2026
Community Voice & Feedback
Closing — v0.4 live BRANCH ships end-to-end across REST, CLI, SDKs, doctor, docs, and bench (Phase 7.1–7.5, PRs #204–#210). User-facing surface complete; release artifacts published.
**What landed:**
- Phase 7.1 — REST canonical `mode` field on BRANCH (#204)
- Phase 7.2 — CLI `--live` / `--no-wait` (#205)
- Phase 7.3 — Python / TypeScript / MCP SDK `mode` / `wait` / `live_fork` (#206)
- Phase 7.4 — `forkd doctor` uffd_wp + memfd_create capability checks (#207)
- Phase 7.5 — bench harness + RESULTS-v0.4.md on a clean source (#210)
- docs sweep — README + API.md + CHANGELOG + DESIGN-v0.4.md (#208)
- `forkd fork --live-fork` for local-boot path (#211)
**Bench (1.5 GiB python-numpy, Intel i7-12700, ext4 HDD):**
| mode | pause p50 | pause p90 | RT p50 |
|---|---:|---:|---:|
| live | 56 ms | 64 ms | 13.7 s (sync) / 69 ms (async) |
| diff | 202 ms | 418 ms | 13.5 s |
| full | 13 550 ms | 14 268 ms | 13.6 s |
**3.6× faster pause vs Diff; 200× faster RT with `wait: false`.** Full data + CSV...
**What landed:**
- Phase 7.1 — REST canonical `mode` field on BRANCH (#204)
- Phase 7.2 — CLI `--live` / `--no-wait` (#205)
- Phase 7.3 — Python / TypeScript / MCP SDK `mode` / `wait` / `live_fork` (#206)
- Phase 7.4 — `forkd doctor` uffd_wp + memfd_create capability checks (#207)
- Phase 7.5 — bench harness + RESULTS-v0.4.md on a clean source (#210)
- docs sweep — README + API.md + CHANGELOG + DESIGN-v0.4.md (#208)
- `forkd fork --live-fork` for local-boot path (#211)
**Bench (1.5 GiB python-numpy, Intel i7-12700, ext4 HDD):**
| mode | pause p50 | pause p90 | RT p50 |
|---|---:|---:|---:|
| live | 56 ms | 64 ms | 13.7 s (sync) / 69 ms (async) |
| diff | 202 ms | 418 ms | 13.5 s |
| full | 13 550 ms | 14 268 ms | 13.6 s |
**3.6× faster pause vs Diff; 200× faster RT with `wait: false`.** Full data + CSV...
Surface RFC posted at #174 — `DESIGN-v0.4-USER-API.md`.
Pins the CLI / REST / SDK shape before implementation starts so we don't re-litigate `--live` vs `--mode live` vs `--wp` mid-coding. Companion to the existing kernel-mechanism doc (`DESIGN-v0.4.md`), use-case inventory (`DESIGN-v0.4-USE-CASES.md`), and FC integration spike (`DESIGN-v0.4-PHASE3-SPIKE.md`).
Five open questions tagged for review in the doc; the most consequential is fail-vs-silent-fallback when the kernel doesn't support `uffd_wp` on memfd. Feedback welcome here or on the PR.
Pins the CLI / REST / SDK shape before implementation starts so we don't re-litigate `--live` vs `--mode live` vs `--wp` mid-coding. Companion to the existing kernel-mechanism doc (`DESIGN-v0.4.md`), use-case inventory (`DESIGN-v0.4-USE-CASES.md`), and FC integration spike (`DESIGN-v0.4-PHASE3-SPIKE.md`).
Five open questions tagged for review in the doc; the most consequential is fail-vs-silent-fallback when the kernel doesn't support `uffd_wp` on memfd. Feedback welcome here or on the PR.
Draft RFC + implementation plan now live: #156
8-week phased plan: PoC → integrate into `forkd-uffd` → pause-window bench → hardening (write-heavy / NUMA / pre-5.7 fallback) → launch.
Target: BRANCH pause < 10 ms by removing the synchronous memory write entirely. Switch source RAM to memfd, arm `UFFDIO_WRITEPROTECT`, async dirty-page copier on uffd handler.
Comments / prior-art pointers especially welcome on the open questions in the doc — particularly the behavior of `UFFD_WP` on memfd-backed VMAs under `KVM_RUN`.
8-week phased plan: PoC → integrate into `forkd-uffd` → pause-window bench → hardening (write-heavy / NUMA / pre-5.7 fallback) → launch.
Target: BRANCH pause < 10 ms by removing the synchronous memory write entirely. Switch source RAM to memfd, arm `UFFDIO_WRITEPROTECT`, async dirty-page copier on uffd handler.
Comments / prior-art pointers especially welcome on the open questions in the doc — particularly the behavior of `UFFD_WP` on memfd-backed VMAs under `KVM_RUN`.
**Update 2026-05-19 — narrowing scope.** v0.3 phase 1 shipped 143× on vanilla Firecracker (no fork required). The `firecracker-patch/` directory that originally drafted a `MemoryBackend::Memfd` patch has been removed (PR opened).
Concretely, we're now explicitly NOT taking the memfd route, for four reasons:
1. **Phase 1 cleared ~85 % of the original target headroom** (30 ms target → 205 ms achieved on 4 GiB SSD) without any Firecracker change.
2. **memfd's value-add isn't sharing** — `mmap(MAP_PRIVATE)` of `memory.bin` across N children already gives kernel-CoW fan-out for free. memfd's real value is letting uffd_wp track source writes cleanly, but that's only useful for the live-fork architecture in `docs/design/userfaultfd.md`, which has its own deferred open questions.
3. **Fork maintenance is real cost**: own musl-via-docker CI, rebase on every upstream tag (~quarterly), track CVEs, weaken the "vanilla Firecracker" trust story users rely on. CodeSandbox went this route and hasn't...
Concretely, we're now explicitly NOT taking the memfd route, for four reasons:
1. **Phase 1 cleared ~85 % of the original target headroom** (30 ms target → 205 ms achieved on 4 GiB SSD) without any Firecracker change.
2. **memfd's value-add isn't sharing** — `mmap(MAP_PRIVATE)` of `memory.bin` across N children already gives kernel-CoW fan-out for free. memfd's real value is letting uffd_wp track source writes cleanly, but that's only useful for the live-fork architecture in `docs/design/userfaultfd.md`, which has its own deferred open questions.
3. **Fork maintenance is real cost**: own musl-via-docker CI, rebase on every upstream tag (~quarterly), track CVEs, weaken the "vanilla Firecracker" trust story users rely on. CodeSandbox went this route and hasn't...
Discovery Source
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