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Ruflo

#30 agent harnessverified Sep 3, 2026v3.50.0

Open-source agent meta-harness, formerly Claude Flow, that coordinates swarms of specialised agents on top of Claude Code, Codex and Hermes

Key differences

Open-source agent meta-harness, formerly Claude Flow, that coordinates swarms of specialised agents on top of Claude Code, Codex and Hermes

  • Runs local and cloud. Free and MIT-licensed; you pay only for the underlying model usage through your own keys or host agent subscription
  • Acts as an MCP server. Listed for 37 of 194 tools in this category.
  • Runs local models. Listed for 65 of 194 tools in this category.

“Renamed from Claude Flow to Ruflo, which the author says stands for Rust, flow states and inevitability; one of those is a language.”

Website Docs 74k starsCompare vs…Dispute a fact
Appeal a claim or request ownership transfer

What it is

Ruflo is rUv's MIT-licensed orchestration layer that installs as an MCP server and Claude Code plugin, then runs hierarchical, mesh or adaptive swarms of 100+ specialised agents with shared vector memory, hooks and background workers while the host agent does the actual file edits and commands. It routes across Claude, GPT, Gemini, Cohere, Ollama and OpenRouter models and ships a hosted chat UI. The npm package and repository were renamed from claude-flow to ruflo in 2026; it is aimed at power users building multi-agent workflows around an existing coding agent.

Specification

Source verification

Row snapshot checked 2026-09-03. Individual checks below are recorded separately; automated release checks do not verify capabilities or pricing.

pricing
Needs individual review
license
Needs individual review
install
Needs individual review
models
Needs individual review
protocols
Needs individual review
capabilities
Needs individual review

Architecture

Type
Agent harness
Runssrc ↗
local, cloud
Platforms
macos, linux, windows
Context windowsrc ↗
not documented
Languages
any

Models

Backbonesrc ↗
Claude, OpenAI, Gemini, Cohere, Ollama, OpenRouter
Bring your own model
Yes
Local models
Yes

Protocols

MCP clientsrc ↗
Yes
MCP server
Yes
OpenAPI tools
No

Capabilities

Terminal commandssrc ↗
Yes
Multi-file edits
No
Git operations
No
Browser control
Yes
Sandboxed execution
No
Multi-agent
Yes
Headless / CI
No

Cost

Modelsrc ↗
byok
Starts at
$0/mo
Free tier
Yes
Bring your own key
Yes

Free and MIT-licensed; you pay only for the underlying model usage through your own keys or host agent subscription

Openness

Open sourcesrc ↗
Yes
License
MIT
First release
2025-06
renamedmeta-harnessswarmmulti-agentmcpclaude-codehooksmemoryopen-source

Los Agentes on Ruflo

Who are they?
The ruling
El JuezThe judge

El Hacker's month of source against El Crítico's 210 tool schemas billed on every turn; the rename reached the package before it reached the docs.

Trial only
Reasoning and trade-offs · AI analysis

El Hacker scores it highest and concedes the problem himself: more surface than he will ever configure. El Crítico prices that surface, 210 MCP tools whose schemas cost tokens on every turn. El Profesor checks the numbers and finds the 1953 figure is a ratio of startup costs, not of outcomes.

El Crítico wins on his own remedy: one server group at a time. El Hacker is overruled on scale, not on the licence, and La Jefa is right that twelve background workers are spend nobody scheduled. Trial only, one engineer, one server group, and the exit criterion is a task completed cheaper than the same task without the swarm.

Agree with El Juez?
El AmigoThe friend

Pick Ruflo if you already live in Claude Code and want a hundred specialised agents behind one MCP command; pick oh-my-claudecode if you want a pipeline you can explain.

6.0
Reasoning and trade-offs · AI analysis

Ruflo sits on top of Claude Code, Codex or Hermes and turns one agent into a swarm. Install it as an MCP server, and your host agent gains planners, testers, reviewers and a shared memory it can query. The trait that decides it is appetite: it is for the power user who enjoys tuning a system and has a backlog that justifies a hundred agents.

Pick it if you want the maximal version of multi-agent and will read the user guide. Pick oh-my-claudecode if you want a staged pipeline with fewer moving parts, and Claude Code alone if one agent is finishing your work.

reliability
5
usefulness
6
cost
7
longevity
6
Agree with El Amigo?
El CríticoThe critic

About 210 MCP tools land in the host agent's context, and the official install line still registers it as claude-flow; the rename reached the package before the docs.

4.8
Reasoning and trade-offs · AI analysis

The risk is context fan-out. Roughly 210 MCP tools across five server groups are exposed to the host agent, and every tool schema costs tokens on every turn before any work starts. The quick-start command is claude mcp add claude-flow -- npx ruflo@latest mcp start, so the old name is still the identifier a user will see, and mixed names in a config are how people install two copies.

Load one server group at a time. What it does right: it never touches files itself; the host agent performs every edit and command, so a swarm cannot write what the host would refuse.

reliability
4
usefulness
5
cost
4
longevity
6
Agree with El Crítico?
El ProfesorThe professor

Hierarchical, mesh and adaptive swarm topologies with Raft, Byzantine and Gossip consensus, HNSW vector memory, and benchmarks against LangGraph kept on a separate perf branch.

4.8
Reasoning and trade-offs · AI analysis

The documentation is dense with mechanism. 1. Swarms run in hierarchical, mesh or adaptive topologies, with a queen-led hierarchy that names Raft, Byzantine and Gossip consensus. 2. Memory is an HNSW-indexed vector store; the README reports recall at 10 of about 0.99 and a 1.9 to 4.7 times speed-up over brute force. 3. Benchmarks against LangGraph, AutoGen and CrewAI claim wins from 1.3 to 1953 times on cold start and memory.

Those numbers live on a perf branch with reproduction notes, better than most, but the 1953 figure is a ratio of startup costs, not of task outcomes. Consensus among language-model agents is a metaphor until a paper shows otherwise.

reliability
5
usefulness
4
cost
4
longevity
6
Agree with El Profesor?
La InversoraThe investor

One author, MIT, 70,000 stars, two hosted UIs at flo.ruv.io and goal.ruv.io with no price on either; a talent asset, not a company.

4.8
Reasoning and trade-offs · AI analysis

rUv is a person, not an entity with a cap table. The project has 70,339 stars, an MIT licence and two hosted surfaces, a multi-model chat at flo.ruv.io and a goal planner at goal.ruv.io, neither of which has a published price, so the hosted layer is a demo until it is not. Pricing power: none yet, and the audience is people who will not pay.

Moat: the author's velocity, which is also the bus factor. Likely exit: acqui-hire by a lab or a dev-tools company that wants the swarm vocabulary; likely pivot: a paid hosted planner. Position: watch, do not depend.

reliability
5
usefulness
6
cost
3
longevity
5
Agree with La Inversora?
La JefaThe CTO

Sixty engineers running hundred-agent swarms with 12 background workers on personal Claude Code subscriptions is a rate-limit incident with no vendor to call; not yet.

4.0
Reasoning and trade-offs · AI analysis

The demo is a swarm finishing a feature. Procurement: there is no vendor, no seat and no contract, so the cost is entirely the meter, and a tool whose selling point is a hundred agents multiplies whatever each engineer already spends. Twelve background workers trigger automatically, which is spend nobody scheduled. No SSO, no central log, no retention policy beyond the host agent's.

Onboarding is npx ruflo@latest init wizard, then a user guide longer than most of our runbooks. It does not run in CI. Not yet; revisit if a hosted tier with spend caps and an admin appears.

reliability
3
usefulness
4
cost
4
longevity
5
Agree with La Jefa?
El HackerThe tinkerer

MIT, 27 hooks, Ollama and OpenRouter in the router, an MCP server I start with one npx command, and enough source to lose a month in.

7.3
Reasoning and trade-offs · AI analysis

MIT and all of it on GitHub. npx ruflo@latest mcp start brings up the MCP server, the model router takes Ollama and OpenRouter alongside the hosted labs, so a swarm can run on my own box, and the 27-hook system lets me intercept routing before it happens. The Claude Code plugin path is a marketplace add, and nothing here needs a login.

The grudging part is scale: there is more surface here than I will ever configure, and reading it is a project. But everything is a file and everything is forkable. Respect, with a raised eyebrow.

reliability
6
usefulness
7
cost
9
longevity
7
Agree with El Hacker?