agent-flow: Instructions file for Claude Code

AGENTS.md

agent-flow AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from josix/agent-flow. It costs 681 tokens per session, scanned A, original, MIT.

A repository guide for a coding agent that reviews changes during the fourth stage of a six-stage development process. It focuses on problems that tools such as linters and type checkers may miss.

In plain words
What is it for?
Use it for co-reviewing implementations in Agent Flow, especially to check whether code matches the requested behavior and handles cases that automated checks do not cover.
Why use it?
It gives the reviewer a defined role and prevents duplicate findings from static-analysis tools. It helps identify incorrect logic, missed edge cases, security concerns, and unclear code intent.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: ${CLAUDE_PLUGIN_ROOT} variable, but also the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions Claude Code; mentions Codex.

This is josix/agent-flow's own configuration. It tells Claude Code, Codex and OpenCode how to work on agent-flow 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 agent-flow configures →

Runs only inside a plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else, and the catalogue could not identify which plugin ships it.

Reuse

Borrowing it

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

Made for: Claude Code, Codex, OpenCode.

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Per session 681 This file is loaded in full into every session.
When invoked 681 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 $0.00681 $0.00681
Opus 5.5 $0.00272 $0.00272
Sonnet 5.5 $0.00136 $0.00136
Haiku 4.5 $0.00068 $0.00068

Measured 2d ago against content hash 59b1648ffffb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-flow 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 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.

AGENTS.md · 36 lines

How it starts

The opening of the file, as written. The whole thing — 36 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Codex co-review — agent-flow repo checklist

This file is for Codex reviewing changes to the agent-flow plugin itself. Claude Code sessions in this repo use .claude/CLAUDE.md instead.

The general co-review rubric — your role next to Lawliet, the output contract (one verdict line + SEVERITY: file:line: issue findings), the severity scale, what to defer to Lawliet, and the tie-breaker — ships with the plugin at templates/codex/review-rubric.md and is inlined into every review prompt by scripts/dispatch-codex-review.sh. Follow it. The checklist below adds the blocker classes specific to this repository.

Project context

Agent Flow is a multi-agent orchestrator plugin for Claude Code. Agents are markdown files under agents/; orchestration commands live in commands/; skills under skills/; the Phases 3–5 loop is the plugin workflow workflows/implement-review-verify.js. /orchestrate delegates each phase to a specialist agent (Riko, Senku, Loid, Lawliet, Alphonse).

Repo-specific blocker classes

  1. Shell safety: standalone .sh files must use set -euo pipefail at the top (hook scripts that intentionally fail open may use set -uo pipefail with a comment). Flag a new .sh file missing it. ERROR. Embedded Bash inside commands/*.md is out of scope.

  2. Heredoc variable expansion: commands/*.md Bash blocks must not use $VAR inside <<'PROMPT' heredocs — single-quoted delimiters suppress expansion, so the variable is emitted literally. ERROR.

  3. YAML validity: YAML emitted to .claude/orchestration.local.md must be syntactically valid; unclosed keys, bad indentation, or stray characters break the grep-based parsers. ERROR.

  4. No hardcoded paths: scripts must not contain /Users/... or other machine-specific absolute paths — use ${HOME}, $(git rev-parse --show-toplevel), or ${CLAUDE_PLUGIN_ROOT}. WARNING.

  5. No secrets: no API keys, tokens, passwords, or credentials in committed files. ERROR.

  6. Hook output contracts: PreToolUse denials use hookSpecificOutput.permissionDecision: "deny", never top-level continue: false (which halts the whole session); Stop hooks emit {"decision": "block", ...} only when blocking and stay silent otherwise (sole exception: the {systemMessage} bypass notice when .claude/skip-test-verification exists); a hook's stdout must be exactly one JSON object (tool output goes to stderr). ERROR.

Read the full file on GitHub · 36 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. 2d ago Changed · +22 tokens per session 59b1648ffffb
  2. 1mo ago Changed · -54 lines · -450 tokens per session 64a0bda6e770
  3. 1mo ago First seen · 90 lines · 1,109 tokens per session scan A 6c95912d4836

Subscribe to this mod's changes

agent-flow AGENTS.md is an instructions file published in the GitHub repository josix/agent-flow (8 stars, last pushed 3d ago), licensed MIT. It adds 681 tokens to every session, about $0.0027 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.

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