Borrowing it
Nothing to install: this file belongs to thewaltero/mythos-router. 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/thewaltero/mythos-router/main/AGENTS.mdgit clone --depth 1 https://github.com/thewaltero/mythos-routerWrote 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/thewaltero/mythos-router/agents-md)<a href="https://agentmods.dev/instructions/thewaltero/mythos-router/agents-md"><img src="https://agentmods.dev/badge/instructions/thewaltero/mythos-router/agents-md.svg" alt="Measured on agentmods" 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 | $0.02232 | $0.02232 |
| Opus 5 | $0.01116 | $0.01116 |
| Sonnet 5 | $0.00446 | $0.00446 |
| Haiku 4.5 | $0.00223 | $0.00223 |
Grade A, and why
mythos-router 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md - mythos-router Project Standards
Project Identity
- Name: mythos-router
- Type: CLI power tool (local-first, zero-slop)
- Stack: TypeScript on Node.js 20+ (ESM,
tsxfor dev)
Architecture
src/mcp-config.ts- Paste-ready MCP client configuration helpersrc/project-policy.ts- Repo-local.mythos/policy.jsonloader and matchersrc/policy-suggestions.ts- Read-only repo inspection for suggested SWD guardrailssrc/action-schema.ts- External-agent action schema, task contract validation, and input validationsrc/runs.ts- Local external-agent run outcome ledger (.mythos/runs)src/cli.ts- Commander.js entry pointsrc/config.ts- Constants, system prompt, validation, budget defaultssrc/client.ts- Provider facade and Anthropic direct-client compatibility pathsrc/budget.ts- Session budget limiter (token cap, turn cap, progress bar)src/swd.ts- SWD execution kernel (engine, types, parsing, snapshots, verification, rollback)src/swd-cli.ts- SWD terminal presentation layer (verification output, dry-run preview)src/sandbox.ts- Isolated temp repo copy gate for external-agent checks before real writessrc/receipts.ts- SWD trust receipts (creation, storage, drift verification)src/memory.ts- Self-healing MEMORY.md manager (SQLite FTS5 derivative index)src/metrics.ts- Global metrics store (persistent budget tracking)src/diff.ts- Myers' diff algorithm (zero-dependency, line-by-line)src/git.ts- Git operations (branching, committing, status)src/mcp.ts- MCP stdio adapter for SWD, receipts, and skills toolssrc/utils.ts- Terminal colors, spinner, formatting, badges, confirm promptsrc/index.ts- Public SDK exports (SWDEngine, parseActions, etc.)src/commands/chat.ts- Interactive REPL and one-shot run orchestration (ChatSession + ChatUI abstraction)src/commands/swd.ts- Model-free external-agent SWD apply/validate commandsrc/commands/mcp.ts- MCP stdio server command (mythos mcp)src/commands/runs.ts- Local external-agent run list/show commandsrc/commands/policy.ts- Project policy suggestion commandsrc/commands/init.ts- Project initialization (environment checks, provider detection, scaffolding)src/commands/verify.ts- Codebase to Memory drift scanner (dry-run aware)src/commands/receipts.ts- SWD receipt list/show/verify commandsrc/commands/dream.ts- Memory compression (dry-run aware)src/commands/stats.ts- Budget analytics reporter
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.
- 8d ago First seen · 128 lines · 2,232 tokens per session scan A e373a36091bd
mythos-router AGENTS.md is an instructions file published in the GitHub repository thewaltero/mythos-router (298 stars, last pushed 3d ago), licensed MIT. It adds 2,232 tokens to every session, about $0.0112 per session on Opus 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 2026-08-30.
Other instructions, from other repositories
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.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
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.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.