Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/rivet-dev/agentos/claude-mdgit clone --depth 1 https://github.com/rivet-dev/agentosWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.04008 | $0.04008 |
| Opus 5 | $0.02004 | $0.02004 |
| Sonnet 5 | $0.00802 | $0.00802 |
| Haiku 4.5 | $0.00401 | $0.00401 |
Grade A, and why
agentos CLAUDE.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
gawk, real curl/sqlite/duckdb/vim, …) compiled to `wasm32-wasip1` against a How it starts
The opening of the file, as written. The whole thing — 302 lines — stays where its author put it; the contents beside it link to each section on GitHub.
agentOS
Always spell the product name agentOS, never AgentOS; do not alter type
identifiers such as AgentOSActorConfig.
agentOS owns the runtime, kernel, VFS, language execution, registry packages, ACP/session layer, agentOS client APIs, docs, and publish machinery. agentOS Exec is the JavaScript, TypeScript, and Python execution surface of agentOS.
Boundaries
- Keep agentOS product versions pinned at
0.0.1in committed files. Release workflows apply real versions transiently withscripts/publish; never commit release-version rewrites. - agentOS-owned npm packages must use the
@rivet-dev/agentos-*namespace. Registry software packages must use@agentos-software/*. Never introduce packages under@agentos/*. - Call guest environments VMs, not sandboxes, except when referring to a package or public API that already uses the word.
- The protocol has no backward compatibility guarantee. Client, sidecar, and protocol crates ship in same-version lockstep; update both sides together.
- Generic runtime and language-execution work belongs here. Do not add a compatibility mirror or a second package namespace for AgentOS language execution.
- Keep root
package.jsonscripts limited to Turbo orchestration; repo-specific commands belong injustfilerecipes or scoped package scripts. - agentOS targets native Linux/container execution. Browser support is not needed or supported here: browser sources may remain as dormant reference code, but their entrypoints must stay disabled and they must not enter default builds, CI, publication, or behavioral-parity requirements without a separately approved design.
Security Model
Trust model:
- Client: trusted, except for code/payloads it submits for execution.
- Sidecar/runtime: trusted enforcement point. It owns the kernel, VFS, mounts/plugins, socket table, permissions, and resource policy.
- Executor: untrusted V8 isolate or WASM guest. Assume guest JS/Python/WASM and third-party packages are hostile.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 302 lines · 4,008 tokens per session scan A 7ec9778fa81e
agentos CLAUDE.md is an instructions file published in the GitHub repository rivet-dev/agentos (4,435 stars, last pushed 5d ago), licensed Apache-2.0. It adds 4,008 tokens to every session, about $0.0200 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
page-agent AGENTS.md
Instructions for alibaba/page-agent, covering instructions for coding assistants, project overview, development commands, architecture and monorepo structure.
eve AGENTS.md
Instructions for vercel/eve, covering agents.md, about eve, repository layout, git workflow and commands.
agent-sandbox AGENTS.md
Instructions for kubernetes-sigs/agent-sandbox, covering agents.md, project summary, repository layout, agent skills and build, test, lint.
agent-sandbox copilot-instructions.md
Instructions for kubernetes-sigs/agent-sandbox: Project Context & Architecture: Refer to AGENTS.md for full project background, module layout, toolchain versions, and core conventions.
ironcurtain CLAUDE.md
Instructions for provos/ironcurtain, covering claude.md, general workflow, git & worktrees, git workflow and platform considerations.
ironcurtain copilot-instructions.md
Instructions for provos/ironcurtain, covering ironcurtain copilot review instructions, platform support, security invariants, ai sdk v6 api (breaking changes) and code conventions.