Skelegent

Skelegent — composable agentic runtime

Skelegent is an experiment in building an agentic system that is composable by construction: layered protocol contracts, swappable providers/tools/state, and deterministic backpressure via tests and specs.

Specs are the source of truth: SPECS.md and specs/.

Quickstart (Nix)

This repo assumes Rust tooling is provided by the Nix flake.

• Full verification: ./scripts/verify.sh
• Canonical commands: see AGENTS.md §Verification

Crate map (workspace members)

Core:

• layer0/ — protocol traits + wire contract
• skelegent/ — umbrella crate

Turn (turn/):

• skg-turn — turn types + provider abstraction
• skg-turn-kit — turn decomposition primitives
• skg-context — prompt/context assembly
• skg-tool — tool traits + ToolRegistry
• skg-mcp — MCP client/server

Operators (op/):

• skg-context-engine — ReAct-style operator loop
• skg-op-single-shot — single-shot operator

Orchestration (orch/):

• skg-orch-kit — composition building blocks
• skg-orch-local — local orchestrator

Effects (effects/):

• skg-effects-core — effect executor trait
• skg-effects-local — local effect interpreter

Middleware (hooks/):

• skg-hook-security — security middleware (RedactionMiddleware, ExfilGuardMiddleware)

State (state/):

• skg-state-memory — in-memory state store
• skg-state-fs — filesystem-backed state store

Environment (env/):

• skg-env-local — local environment (process/tool execution glue)

Providers (provider/):

• skg-provider-anthropic
• skg-provider-openai
• skg-provider-ollama

Security (secret/, auth/, crypto/):

• skg-secret — secret resolution
• skg-secret-vault — HashiCorp Vault backend
• skg-auth — auth/credential framework
• skg-crypto — cryptographic primitives

Implementations

Heavy-dependency implementations — SQLite, CozoDB, Temporal, Git effects, sweep operators, and auth providers — live in a separate repository to keep this core dependency-free:

skelegent-extras — provider ecosystem

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: secbear
• Source: secbear/skelegent
• License: Apache-2.0
• Homepage: https://secbear.github.io/skelegent

Install and usage instructions live in the source repository linked above.