SiftMarks: Instructions file for Codex

AGENTS.md

SiftMarks AGENTS.md is an instructions file for Codex, OpenCode from Lling0000/SiftMarks. It costs 473 tokens per session, scanned A, original, MIT.

Repository-specific instructions for SiftMarks, a local-first TypeScript monorepo that turns browser bookmarks into searchable AI-assisted memory. A monorepo stores several related packages and apps in one repository.

In plain words
What is it for?
Use it when importing, searching, indexing, tagging, or finding duplicate bookmarks; working on the command-line tool, dashboard, browser extension, database, or MCP server; or running builds and type checks.
Why use it?
It explains the package and app boundaries, available commands, and how to run tests without touching the user's real bookmark database.

Instructions file for CodexOpenCode

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

This is Lling0000/SiftMarks's own configuration. It tells Codex and OpenCode how to work on SiftMarks 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 SiftMarks configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Lling0000/SiftMarks. 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/Lling0000/SiftMarks/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Lling0000/SiftMarks

Made for: Codex, OpenCode.

Wrote 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.

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README.md
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Your own site
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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.

agentmods 80×15 button for SiftMarks AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/lling0000/siftmarks/agents-md"><img src="https://agentmods.dev/badge/instructions/lling0000/siftmarks/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 473 This file is loaded in full into every session.
When invoked 473 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 $0.00473 $0.00473
Opus 5.5 $0.00189 $0.00189
Sonnet 5.5 $0.00095 $0.00095
Haiku 4.5 $0.00047 $0.00047

Measured 2mo ago against content hash fbb97ea97dba, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

SiftMarks 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 · 42 lines

How it starts

The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SiftMarks Agent Notes

Project Shape

SiftMarks is a local-first TypeScript monorepo for turning browser bookmarks into searchable AI memory.

  • packages/shared: shared types and utility functions.
  • packages/db: SQLite schema and data access through better-sqlite3.
  • packages/core: bookmark import, parsing, search, duplicate detection, rescue suggestions, and browser bookmark detection.
  • packages/ai: mock, OpenAI-compatible, and Ollama-compatible AI providers.
  • packages/indexer: FTS indexing, summaries, tags, and embeddings.
  • apps/cli: siftmarks command-line interface.
  • apps/mcp-server: MCP stdio server for AI clients.
  • apps/web: Next.js local dashboard and API routes.
  • apps/chrome-extension: Chrome extension that talks to the local web API on port 4399.

Commands

  • Install: npm install
  • Build non-web packages, CLI, and MCP server: npm run build:packages
  • Build everything: npm run build
  • Run the web dashboard: npm run dev
  • Run the CLI after building: node apps/cli/dist/index.js
  • Typecheck: npm run typecheck

Use SIFTMARKS_HOME=/tmp/siftmarks-test for smoke tests that should not touch the user's real ~/.siftmarks database.

Current Caveats

  • The web app has its own rules in apps/web/AGENTS.md; read that file before editing anything under apps/web.
  • The root typecheck command can surface web/Next configuration issues. Do not assume package-level builds prove the web app is production-buildable.
  • The Chrome extension assumes the web app is running at http://localhost:4399.
  • AI calls must stay disabled unless a provider is explicitly configured; mock mode is the default.

Working Rules

  • Do not perform git actions unless the user explicitly asks.
  • Keep changes scoped to the requested area.
  • Prefer existing package boundaries over adding new cross-package shortcuts.
  • Treat local bookmark databases and browser profile files as user data; use temporary data directories for tests when possible.
  • When changing data writes, preserve the local-first behavior and avoid silent external network calls.

Read the full file on GitHub · 42 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 First seen · 42 lines · 473 tokens per session scan A fbb97ea97dba

Subscribe to this mod's changes

SiftMarks AGENTS.md is an instructions file published in the GitHub repository Lling0000/SiftMarks (27 stars, last pushed 4mo ago), licensed MIT. It adds 473 tokens to every session, about $0.0019 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 2026-08-30.

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