Borrowing it
Nothing to install: this file belongs to luthersystems/elps. 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/luthersystems/elps/main/AGENTS.mdgit clone --depth 1 https://github.com/luthersystems/elpsWrote 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/luthersystems/elps/agents-md)<a href="https://agentmods.dev/instructions/luthersystems/elps/agents-md"><img src="https://agentmods.dev/badge/instructions/luthersystems/elps/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/luthersystems/elps/agents-md"><img src="https://agentmods.dev/badge/instructions/luthersystems/elps/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 | $0.04240 | $0.04240 |
| Opus 5.5 | $0.01696 | $0.01696 |
| Sonnet 5.5 | $0.00848 | $0.00848 |
| Haiku 4.5 | $0.00424 | $0.00424 |
Grade A, and why
elps 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidance for coding agents working in this repository. Prescriptive,
step-by-step workflows live in .claude/skills/ (table at the bottom); this
file is the durable overview.
Project Overview
ELPS is an embedded Lisp interpreter implemented in Go. It is a Lisp-1 dialect
designed to be embedded within Go applications. Module:
github.com/luthersystems/elps.
Build and Test Commands
| Command | Description |
|---|---|
make |
Build the ./elps binary |
make test |
Run all tests (Go tests + example lisp files) |
make go-test |
Run Go tests only: go test -cover ./... |
make race |
Full test suite under the race detector (CI runs it) |
make test-elpscheck |
Test suite under the elpscheck build tag (CI runs it) |
make elpsvet |
elps's own Go analyzers, untagged + elpscheck passes (CI runs it; see the elpsvet skill) |
make fuzz |
Run every native Go fuzz target, 30s each (FUZZTIME=10m make fuzz for longer; see the fuzz skill) |
make fuzz-list |
List the discovered fuzz targets without running them |
go test ./lisp/... |
Run tests for a specific package |
go test -run TestName ./lisp/ |
Run a single test |
make static-checks |
golangci-lint with gosec, plus an elpscheck-tagged pass (warns if your version differs from CI's) |
make fieldalign-fix |
Reorder struct fields for the fieldalignment gate (uses betteralign — fieldalignment -fix deletes field comments) |
make ci-gates-test |
Self-test for the CI gate scripts in scripts/ |
make api-break-gate |
API break gate vs BASE (default origin/main; CI runs it; see below) |
make repl |
Build and launch the REPL |
./elps run file.lisp |
Run a lisp file |
./elps doc <query> |
Show function/package documentation |
./elps doc -m |
Check for missing docstrings (used in CI) |
./elps doc --guide |
Print the full language reference |
./elps doc --debug-guide |
Print the debugging guide |
./elps doc --lsp-guide |
Print the Language Server Protocol guide |
./elps lsp --stdio |
Start the LSP server (stdio transport) |
./elps lsp --port 7998 |
Start the LSP server (TCP transport) |
./elps lint file.lisp |
Run static analysis on a lisp file |
./elps fmt file.lisp |
Format a lisp file |
./elps minify file.lisp |
Minify sources, emitting a symbol map |
./elps analyze file.lisp |
Run performance analysis on lisp sources |
./elps debug file.lisp |
Run a file under the DAP debugger |
./elps mcp |
Start the ELPS MCP server over stdio |
make release-notes |
Preview release notes (commits, PRs, CI status since last tag) |
make release VERSION=v1.X.0 |
Human fallback only; agents use the release skill |
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.
- today Changed · +4 lines · +69 tokens per session 2c0842a4ab6e
- 2d ago First seen · 285 lines · 4,171 tokens per session scan A 48f7489a3e36
elps AGENTS.md is an instructions file published in the GitHub repository luthersystems/elps (36 stars, last pushed today), licensed BSD-3-Clause. It adds 4,240 tokens to every session, about $0.0170 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 2026-10-26.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.