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rlg: Instructions file for Codex

AGENTS.md

rlg AGENTS.md is an instructions file for Codex, OpenCode from sebastienrousseau/rlg. It costs 871 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for rlg, a Rust structured-logging library that sends log records through a fixed-size buffer to background output components. They define how changes, branches, versions, and performance-sensitive code must be handled.

In plain words
What is it for?
Use them when changing rlg, its command-line tool, reports, exporters, or companion crates, especially when branching, preparing a release, or reviewing performance-sensitive code.
Why use it?
They give coding agents and contributors the project rules needed to avoid breaking the library's logging path, release process, or related components.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is sebastienrousseau/rlg's own configuration. It tells Codex and OpenCode how to work on rlg itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything rlg configures →

not rated 6repo changed 1mo ago A scan 871 tokens original Apache-2.0
View source ↗ sebastienrousseau/rlg doc.rustlogs.com
Reuse

Borrowing it

Nothing to install: this file belongs to sebastienrousseau/rlg. 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/sebastienrousseau/rlg/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/sebastienrousseau/rlg

Made for: Codex, OpenCode.

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.

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/sebastienrousseau/rlg/agents-md"><img src="https://agentmods.dev/badge/instructions/sebastienrousseau/rlg/agents-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.

agentmods 80×15 button for rlg AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/sebastienrousseau/rlg/agents-md"><img src="https://agentmods.dev/badge/instructions/sebastienrousseau/rlg/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 871 This file is loaded in full into every session.
When invoked 871 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00871 $0.00871
Opus 5.5 $0.00348 $0.00348
Sonnet 5.5 $0.00174 $0.00174
Haiku 4.5 $0.00087 $0.00087

Measured 1mo ago against content hash a3748d7257c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rlg AGENTS.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 1mo 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.

AGENTS.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — rlg

Rules for anyone, human or agent, changing this repository. The portfolio-wide standard (~/Code/AGENTS.md) applies too; where this file is more specific, it wins.

What rlg is

rlg (RustLogs) is a near-lock-free structured logging library for Rust: an application thread hands a record to a 65k-slot ring buffer with atomic operations only, and a background flusher formats and writes it to the platform sink (os_log, journald, a file or stdout). Around the core crate sit satellites that share its version: a CLI (rlg-cli), reports (rlg-report), an MCP server (rlg-mcp), an OTLP exporter (rlg-otlp), and redaction, tower, test, WASM and eBPF crates.

The core value is the hot path: ingest() never takes a lock and never formats. Anything that adds a lock, an allocation or formatting work to it is a regression, whatever else it improves.

Rules

  1. Branch. Work for the next release goes on feat/v<next-version>, one 0.0.1 above the current version, and reaches main only through that branch's single release pull request. Dependabot and topic work land on it as commits, never as pull requests into it.
  2. Versions move in lockstep. All ten publishable crates share one version; xtask stays at 0.0.0. Install snippets in the docs must name it (scripts/check-doc-versions.sh), and so must the MCP manifests (scripts/check-mcp-manifests.sh).
  3. Commits are signed, <type>: <subject> in at most 50 characters, with an Assisted-by: trailer when an agent helped. Agents never add Signed-off-by:.
  4. No new suppressions. clippy::pedantic and clippy::nursery are denied; fix the finding instead of allowing it.
  5. Complexity ceilings (cyclomatic 10, cognitive 15, Halstead difficulty 30, 60 lines per function, 500 per file) hold for code you write or touch. scripts/complexity-baseline.json lists existing offenders; it only ever shrinks, via scripts/complexity-gate.py --update after an improvement.
  6. Dependencies must pass cargo deny --all-features check and cargo vet --locked. Never widen deny.toml or add a vet exemption to make a check pass without saying why in the commit.
  7. unsafe is denied except for the documented platform FFI in crates/rlg/src/sink.rs. Thread-spawning tests carry #[cfg_attr(miri, ignore)].
  8. Decisions that will be questioned later get an ADR in docs/adr/; reversing one means a new ADR that supersedes it.

Read the full file on GitHub · 72 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.

  1. 1mo ago Changed · +2 lines · +28 tokens per session a3748d7257c2
  2. 1mo ago First seen · 70 lines · 843 tokens per session scan A 4c1be0f5fc56

Subscribe to this mod's changes

rlg AGENTS.md is an instructions file published in the GitHub repository sebastienrousseau/rlg (6 stars, last pushed 3d ago), licensed Apache-2.0. It adds 871 tokens to every session, about $0.0035 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 2026-10-01.

Git and workflowLanguagesRustloggingmcpmcp-servermodel-context-protocolobservabilityotlp
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