simplicio-runtime

A governed execution layer for Simplicio workflows, coordinating gates, side effects, checkpoints, receipts, shared artifacts, and worker activity. MCP is a standard way for software tools to connect to an agent.

In plain words
What is it for?
Use it for workflows that need durable records, controlled side effects, backpressure, shared execution artifacts, MCP compatibility, or coordination with subagents.
Why use it?
It provides controlled execution and evidence that work used the right repository revision and artifacts, while keeping scheduling and code changes in their designated components.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/wesleysimplicio/simplicio-loop/simplicio-runtime
Any agent
npx skills add wesleysimplicio/simplicio-loop --skill simplicio-runtime
Clone the repo
git clone --depth 1 https://github.com/wesleysimplicio/simplicio-loop

Made for: Claude Code, Codex.

Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 869 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5 $0.00069 $0.00869
Opus 5 $0.00034 $0.00434
Sonnet 5 $0.00014 $0.00174
Haiku 4.5 $0.00007 $0.00087

Measured 2d ago against content hash a3a8f5017225, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

simplicio-runtime scanned grade A with 0 findings 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 2d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/simplicio-runtime/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Simplicio Runtime

Worker preflight and centralized artifact policy

Every worker first reads repository AGENTS.md, CLAUDE.md, and all relevant local skills before Runtime operations. Runtime admits only the one binary/artifact set built centrally from the canonical default branch and shared read-only by workers. Workers must not rebuild binaries or regenerate canonical Mapper/Fast artifacts; worktrees isolate source edits and receipts only. Runtime receipts must include repository/revision, binary digest/version, Mapper generation, and artifact digest. Missing, stale, incompatible, or mismatched central artifacts fail closed and route to a central rebuild, never a worker-local repair or fabricated fallback.

Runtime/Tokio owns gates, effects, receipts, and reconciliation; Loop/Prism remains the Python asyncio scheduler and I/O layer.

Use Runtime as the governed execution layer around Loop and Dev CLI. It provides controls and evidence; it does not replace Mapper's survey or Dev CLI's mutation contract. Read references/capabilities.yaml and references/interfaces.md for exact gates and receipt rules.

Complete interface map

Use the generated Prism inventory for the installed Runtime release. Record CLI/MCP tools, Python/Rust/native APIs, configuration, effect policies, evidence inputs/outputs, error codes, fallbacks, dependencies, measured cost, version, and MCP/OS compatibility before enabling a capability.

Routing

  • Invoke for MCP tools, native executors, gates, checkpoints, durable receipts, subagents, memory, pools, backpressure, or reconciliation.
  • Require explicit capability, repository, scope, and effect policy before side effects.
  • Reconcile only from durable evidence; never synthesize a receipt or delete an unknown-effect lock.
  • Support old and new MCP tool shapes through the compatibility capability.
  • Fall back to Loop without Runtime when governance/native execution is not required and the Loop path is available.

Prism concurrency policy

Read the full file on GitHub · 68 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 2d ago First seen · 68 lines · 69 tokens per session scan A a3a8f5017225

Subscribe to this mod's changes

simplicio-runtime is a skill published in the GitHub repository wesleysimplicio/simplicio-loop (2 stars, last pushed 2d ago), licensed MIT. It adds 69 tokens to every session and 869 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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