Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/psg2/feed-reader/agents-mdgit clone --depth 1 https://github.com/psg2/feed-readerWhat 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 | $0.01578 | $0.01578 |
| Opus 5 | $0.00789 | $0.00789 |
| Sonnet 5 | $0.00316 | $0.00316 |
| Haiku 4.5 | $0.00158 | $0.00158 |
Grade A, and why
feed-reader 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 yesterday.
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 — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Feed Reader — codebase guide
Single-user feed reader: TanStack Start web app on Vercel + Neon Postgres, a SwiftUI macOS client (macos/, see macos/README.md) and a remote MCP endpoint. The server is the source of truth; every client writes through to it.
Dev workflow
pnpm deps:upstarts Postgres + pgweb in Docker and writesPOSTGRES_URL/TEST_DATABASE_URL(Docker-assigned ports) into.env.docker. The dev, test and db scripts load it; never hardcode ports.pnpm devruns Vite behind portless athttps://feedreader.localhost(apps/web/portless.json); worktrees gethttps://<branch>.feedreader.localhost. Escape hatch:cd apps/web && pnpm exec vite dev --port 3000.- A fresh clone runs with no
.env.local(dev defaults inapps/web/lib/env.ts)..env.examplelists every optional variable;docs/deploy.mdexplains them.
Stack
TanStack Start (Vite + Nitro, SSR) · TanStack Router (file-based) · TanStack Query + oRPC (contract-first) · BetterAuth (email/password, OTP, optional Google, API keys, OAuth 2.1 provider for the macOS app and MCP clients) · Postgres 17 + Drizzle · Tailwind v4 + shadcn/ui + Radix · Turborepo + pnpm · oxlint + oxfmt · Vercel. Sentry, PostHog and Axiom are wired but disabled without keys.
Commands
pnpm dev | build | preview
pnpm test # apps/web: vitest unit (real Postgres) + frontend (happy-dom)
pnpm test:db:migrate # once after deps:up: migrate TEST_DATABASE_URL
pnpm test:e2e # Playwright (apps/web/e2e)
pnpm lint | lint:fix | format | format:check | type-check | knip
pnpm db:generate | db:migrate | db:seed | db:reset | db:studio
Layout
apps/web/
app/routes/ TanStack file routes (UI + /api/* server routes)
app/server-fns/ createServerFn helpers (auth, instance config)
components/ ui/ (shadcn), providers/, shared/
hooks/, lib/ client + server utilities (env, auth, orpc, email, bearer)
server/routes/ oRPC route wiring (base.ts: pub / authed middleware)
server/usecases/ business logic + authorization (tests live here)
server/repos/ pure Drizzle queries
server/lib/ feed fetching/parsing, OPML, inbound e-mail, cron helpers
server/mcp/ MCP server on top of the usecases
tests/ setup (per-test rolled-back transaction), factories, fixtures
packages/db Drizzle schema + migrations (drizzle/*.sql, committed)
packages/api oRPC contract (@orpc/contract + zod)
packages/query typed client + TanStack Query hooks (docs/patterns.md)
macos/ SwiftUI app, SQLite mirror, snapshot tests
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.
- yesterday First seen · 90 lines · 1,578 tokens per session scan A cdb094c09eb4
feed-reader AGENTS.md is an instructions file published in the GitHub repository psg2/feed-reader (0 stars, last pushed 7d ago), licensed MIT. It adds 1,578 tokens to every session, about $0.0079 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 2026-08-31.
Other instructions, from other repositories
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.
buildNext
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
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, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit 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.
langchain 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.