What is agentrun CLAUDE.md?

Project guidance for agentrun, a public Go library for building agent systems. It explains the library's shared interfaces, backend design and development practices.

Use it when designing or changing agentrun APIs, adding a command-line or API backend, and building or testing the Go library.

Library code is used by other developers, so its public interfaces must stay small, composable and easy to extend. These instructions help keep implementation decisions aligned with that goal.

How dmora/agentrun configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to dmora/agentrun. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/dmora/agentrun/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/dmora/agentrun

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/dmora/agentrun/claude-md/github.svg)](https://agentmods.dev/instructions/dmora/agentrun/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/dmora/agentrun/claude-md"><img src="https://agentmods.dev/badge/instructions/dmora/agentrun/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/dmora/agentrun/claude-md"><img src="https://agentmods.dev/badge/instructions/dmora/agentrun/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 5,375 This file is loaded in full into every session.

When invoked 5,375 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.05375	$0.05375
Opus 5.5	$0.02150	$0.02150
Sonnet 5.5	$0.01075	$0.01075
Haiku 4.5	$0.00537	$0.00537

Measured 2mo ago against content hash aadcd8733d4a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agentrun CLAUDE.md 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 2mo 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.md · 190 lines

How it starts

The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.

agentrun — Claude Code Project Guide

Library-First Mindset

agentrun is a public Go library — not an application. Every decision must prioritize external consumers:

Composability: interfaces should be wrappable, decoratable, and mixable without friction. Consumers build their own orchestrators on top of agentrun primitives.
Extensibility: adding a custom backend (CLI or API) should require implementing 1–2 small interfaces, not understanding the whole codebase. No closed registries or internal-only extension points.
Greenfield: no backwards compatibility concerns. Design the best API possible without legacy shims or deprecation paths.
Think like a library author: exported API surface is a contract. Keep it small, intentional, and hard to misuse. Unexported internals can change freely.

Design Philosophy — Root is Language, Backends are Dialect

See DESIGN.md for full rationale, examples, and anti-patterns.

The root package defines the shared vocabulary for all backends:

Output vocabulary: MessageType constants (what agents say)
Input vocabulary: Option* constants (what you ask of agents)
Structural config: Session.Model, Session.Prompt

Backend packages translate vocabulary into their wire format (CLI flags, API bodies).

Decision rule for where a constant lives:

Would this concept exist if backend X didn't exist? Yes → root. No → backend package.

Examples: OptionSystemPrompt → root (every LLM has one). OptionPermissionMode → claude/ (Claude CLI sandboxing).

Anti-pattern: Don't place cross-cutting constants in a backend just because only one backend exists today. Design for the intended architecture (N backends), not the current snapshot.

Build & Test Commands

make qa             # full quality gate (tidy-check + lint + test-race + vet + vulncheck + examples)
make check          # fast check: lint + test (no race detector)
make test           # go test -count=1 ./...
make test-race      # go test -race -count=1 ./...
make lint           # golangci-lint run ./...
make vet            # go vet ./...
make cover          # test with race + coverage report
make tidy-check     # verify go.mod/go.sum are clean
make vulncheck      # govulncheck ./...
make bench          # benchmarks with memory allocation stats
make fuzz           # fuzz tests (30s per target)
make fmt            # gofmt -w .
make tidy           # go mod tidy
make examples-build # cd examples && go build ./...

Read the full file on GitHub · 190 lines

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.

2mo ago First seen · 190 lines · 5,375 tokens per session scan A aadcd8733d4a

Subscribe to this mod's changes

agentrun CLAUDE.md is an instructions file published in the GitHub repository dmora/agentrun (5 stars, last pushed 2mo ago), licensed MIT. It adds 5,375 tokens to every session, about $0.0215 per session on Opus 5.5. 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.

LLM Orchestration ai-agents cli

agentrun CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
agentrun CLAUDE.mddmora/agentrun	Instructions file	5	2mo ago	MIT	A	5,375	Claude Code
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vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
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agentrun: Instructions file for Claude Code