lfcode: Instructions file for Codex

AGENTS.md

lfcode AGENTS.md is an instructions file for Codex, OpenCode from lfyxhappy/lfcode. It costs 3,727 tokens per session, scanned A, original, MIT.

Repository instructions for lfcode, a project with a JavaScript SDK and tracked implementation plans. A monorepo is one repository containing multiple related packages.

In plain words
What is it for?
Use them when changing packages, regenerating the JavaScript SDK, following a task plan, or preparing commits and pull requests.
Why use it?
They clarify the correct development branch, how plans must reflect real progress, and how to build and verify the SDK.

Instructions file for CodexOpenCode

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

This is lfyxhappy/lfcode's own configuration. It tells Codex and OpenCode how to work on lfcode 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 lfcode configures →

Reuse

Borrowing it

Nothing to install: this file belongs to lfyxhappy/lfcode. 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/lfyxhappy/lfcode/dev/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/lfyxhappy/lfcode

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 3,727 This file is loaded in full into every session.
When invoked 3,727 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 $0.03727 $0.03727
Opus 5.5 $0.01491 $0.01491
Sonnet 5.5 $0.00745 $0.00745
Haiku 4.5 $0.00373 $0.00373

Measured 2mo ago against content hash 396404ee9474, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

lfcode 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 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.

AGENTS.md · 211 lines

How it starts

The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.

  • To regenerate the JavaScript SDK, run bun run --cwd packages/sdk/js build.
  • The default branch in this repo is dev.
  • Local main ref may not exist; use dev or origin/dev for diffs.
  • Treat .codex/*.md plans as execution-tracking documents, not just notes: before starting plan-scoped work, read the referenced plan and respect its current Status:.
  • If the user asks for a plan first, or the task is being tracked in .codex/, create or update the relevant plan file before implementation starts and give it an explicit Status:.
  • Keep the plan lifecycle synchronized with reality: use planned/pending before execution, switch to in_progress once implementation actually starts, and leave it non-completed if work is only partially done or verification is still missing.
  • When implementing a task from a plan under .codex/, update that plan in the same change flow: adjust scope/details if they changed, record any remaining gaps, and mark the plan's Status: as completed only after the task is fully implemented and verified.
  • When a .codex/ plan is completed and its changes affect the desktop app, runtime, settings, MCP/tools, or other behavior the user is expected to test locally, finish the same flow with the pre-release package/sync lane below; do not touch the production use-copy unless the user explicitly asks to “同步到使用版” or “更新使用版”.
  • Keep .codex/*.md reserved for plans and execution tracking. Store standalone HTML design mockups, visual replicas, and reviewable static UI drafts under .codex/design-html/ instead of output/ or scattered temp locations.
  • When creating a design draft in .codex/design-html/, prefer a self-contained .html file with inline CSS/assets when practical so it can be opened and reviewed directly without extra build steps.

Project Structure

  • This repo is a Bun workspace monorepo rooted at package.json.
  • Most product code lives under packages/.
  • The core runtime and session engine live in packages/lfcode.
  • The web UI lives in packages/app, and the Electron host lives in packages/desktop.
  • Shared packages such as packages/ui, packages/plugin, packages/sdk/js, packages/shared, and packages/script support the app/runtime layers.
  • Cross-repo specs live in specs/.
  • User-local project config and content under the repo root belong in .lfcode/ (agent/, command/, skills/, themes/, plugins/, tool/, glossary/, plus opencode.jsonc and tui.json).
  • App settings surfaces now include packages/app/src/components/settings-skills.tsx and packages/app/src/components/settings-archives.tsx; skill-management and archive changes should be validated through those settings views, not only through server routes.
  • Instance-side skill APIs live under packages/lfcode/src/server/routes/instance/skills.ts; when changing local skill import, discovery, hiding, or deletion flows, keep the app settings UI and this route in sync.

Read the full file on GitHub · 211 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. 2mo ago Changed · +1 lines · +103 tokens per session 396404ee9474
  2. 2mo ago First seen · 210 lines · 3,624 tokens per session scan A 11bedcb03859

Subscribe to this mod's changes

lfcode AGENTS.md is an instructions file published in the GitHub repository lfyxhappy/lfcode (2 stars, last pushed 1mo ago), licensed MIT. It adds 3,727 tokens to every session, about $0.0149 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.

Related

lfcode AGENTS.md compared with instructions from other repositories

lfcode AGENTS.md next to 6 instructions from other repositories
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lfcode AGENTS.mdlfyxhappy/lfcodeInstructions file21mo agoMITA3,727Codex, OpenCode
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vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode