Borrowing it
Nothing to install: this file belongs to CYZice/devs-codex. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/CYZice/devs-codex/main/AGENTS.mdgit clone --depth 1 https://github.com/CYZice/devs-codexWrote 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.
[](https://agentmods.dev/instructions/cyzice/devs-codex/agents-md)<a href="https://agentmods.dev/instructions/cyzice/devs-codex/agents-md"><img src="https://agentmods.dev/badge/instructions/cyzice/devs-codex/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.
<a href="https://agentmods.dev/instructions/cyzice/devs-codex/agents-md"><img src="https://agentmods.dev/badge/instructions/cyzice/devs-codex/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01676 | $0.01676 |
| Opus 5.5 | $0.00670 | $0.00670 |
| Sonnet 5.5 | $0.00335 | $0.00335 |
| Haiku 4.5 | $0.00168 | $0.00168 |
Grade A, and why
devs-codex 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.
This is a copy
100% identical to devspace AGENTS.md — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DevSpace
DevSpace is a local development execution layer for MCP hosts such as ChatGPT and Claude. It gives a remote host workspace-scoped tools for reading, editing, searching, running commands, managing Git worktrees, reviewing changes, and coordinating bounded subagents on the user's machine.
Pi's SDK currently provides mature local coding primitives. DevSpace wraps those primitives in a Streamable HTTP MCP server and adds the product-specific boundaries around them: approved roots, workspace state, instructions, process sessions, worktrees, artifacts, review checkpoints, widgets, and subagent execution.
DevSpace owns tooling mechanics. The model receives only meaningful and actionable choices. The user sees outcomes. Tool defination should not leak internal implementation or it shoudn't be giving unwanted options to model to choose from if tooling can handle this.
Product model
These ideas should stay true as the project evolves:
- The host is the orchestrator. DevSpace exposes clear capabilities and execution state. It should not hide the workflow inside an opaque, uninspectable agent loop.
- Everything happens in a workspace. A workspace represents one local project directory or worktree plus the instructions and state accumulated while operating in it.
- Local authority stays explicit. DevSpace runs with access to the user's machine. Roots, paths, commands, processes, credentials, and destructive operations must be treated as product boundaries.
- Subagents are bounded workers. A subagent should have an explicit task, profile, working context, lifecycle, and result that the host can inspect and coordinate.
- Adapters stay at the edges. Pi, MCP hosts, and model providers each have their own terminology and capabilities. Provider-specific behavior should not become the core domain model.
- Prefer composable primitives. Build a small set of reliable operations that can be combined into larger workflows instead of baking every workflow into the server.
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.
- 1mo ago First seen · 118 lines · 1,676 tokens per session scan A 47937030f5f0
devs-codex AGENTS.md is an instructions file published in the GitHub repository CYZice/devs-codex (0 stars, last pushed 2mo ago), licensed MIT. It adds 1,676 tokens to every session, about $0.0067 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to devspace AGENTS.md, differing in 3 lines, and is treated as a copy.
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