obsidian-agent-client is an Obsidian plugin that embeds AI agents supporting the Agent Client Protocol into an Obsidian vault, allowing them to read and edit notes and work with project directories. It is for people who want to use agents such as Claude Code, Codex, or Gemini CLI inside Obsidian. The catalogue entries configure agent sessions, permissions, commands, and related workflows.
Borrowing it
Nothing to install: this file belongs to RAIT-09/obsidian-agent-client. 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/RAIT-09/obsidian-agent-client/master/AGENTS.mdgit clone --depth 1 https://github.com/RAIT-09/obsidian-agent-clientWrote 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/rait-09/obsidian-agent-client/agents-md)<a href="https://agentmods.dev/instructions/rait-09/obsidian-agent-client/agents-md"><img src="https://agentmods.dev/badge/instructions/rait-09/obsidian-agent-client/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/rait-09/obsidian-agent-client/agents-md"><img src="https://agentmods.dev/badge/instructions/rait-09/obsidian-agent-client/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 | $0.04657 | $0.04657 |
| Opus 5.5 | $0.01863 | $0.01863 |
| Sonnet 5.5 | $0.00931 | $0.00931 |
| Haiku 4.5 | $0.00466 | $0.00466 |
Grade A, and why
obsidian-agent-client 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 1mo 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 — 348 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Client Plugin - LLM Developer Guide
Overview
Obsidian plugin for AI agent interaction (Claude Code, Codex, Gemini CLI, Mistral Vibe, OpenCode, Kiro, Hermes Agent, Pi, Grok Build, custom agents) via ACP.
Tech: React 19, TypeScript, Obsidian API, Agent Client Protocol (ACP)
Architecture
src/
├── types/ # Type definitions (no logic, no dependencies)
│ ├── chat.ts # ChatMessage, MessageContent, PromptContent, AttachedFile, ActivePermission
│ ├── session.ts # ChatSession, SessionUpdate (12-type union), SessionInfo, Capabilities
│ ├── agent.ts # BaseAgentSettings, PresetAgentUserSettings, CustomAgentSettings
│ └── errors.ts # AcpError, ProcessError, ErrorInfo
├── acp/ # ACP protocol (SDK dependency confined here)
│ ├── acp-client.ts # Process lifecycle, UI-facing API (AcpClient class)
│ ├── acp-handler.ts # SDK event handler + sessionId filter + listener broadcast
│ ├── type-converter.ts # ACP SDK ↔ internal type conversion
│ ├── permission-handler.ts # Permission queue, auto-approve, Promise resolution
│ └── terminal-handler.ts # Terminal process create/output/kill
├── services/ # Business logic (non-React, no React imports)
│ ├── vault-service.ts # Vault access + fuzzy search + CM6 selection tracking
│ ├── settings-service.ts # Reactive settings store (observer pattern only)
│ ├── session-storage.ts # Session metadata + message file I/O (sessions/*.json)
│ ├── preset-agents.ts # Static registry of preset (built-in) agents (PRESET_AGENTS)
│ ├── settings-normalizer.ts # Settings validation helpers + presetAgents normalization/migration
│ ├── session-helpers.ts # Agent enumeration/resolution, API key injection (pure functions)
│ ├── session-state.ts # Session state updates (legacy mode/model, config restore)
│ ├── message-state.ts # Message array transforms (upsert, merge, streaming apply)
│ ├── message-sender.ts # Prompt preparation + sending (pure functions)
│ ├── chat-exporter.ts # Markdown export with frontmatter
│ ├── view-registry.ts # Multi-view management, focus, broadcast
│ └── update-checker.ts # Agent/plugin version checking
├── hooks/ # React custom hooks (state + logic)
│ ├── useAgent.ts # Facade: composes useAgentSession + useAgentMessages
│ ├── useAgentSession.ts # Session lifecycle, config options, optimistic updates
│ ├── useAgentMessages.ts # Message state, streaming (RAF batch), permissions
│ ├── useSuggestions.ts # @[[note]] mentions + /command suggestions (unified)
│ ├── useSessionHistory.ts # Session list/load/resume/fork
│ ├── useChatActions.ts # Business callbacks (send, newChat, export, restart, etc.)
│ ├── useHistoryModal.ts # Session history modal lifecycle
│ └── useSettings.ts # Settings subscription (useSyncExternalStore)
├── ui/ # React components
│ ├── ChatContext.ts # React Context (plugin, acpClient, vaultService, settingsService)
│ ├── ChatPanel.tsx # Orchestrator: calls hooks, workspace events, rendering
│ ├── ChatView.tsx # Sidebar view (ItemView wrapper)
│ ├── FloatingChatView.tsx # Floating window (position/drag/resize)
│ ├── ChatHeader.tsx # Header (sidebar + floating variants)
│ ├── MessageList.tsx # Virtualized message list (@tanstack/react-virtual)
│ ├── MessageBubble.tsx # Single message rendering (content dispatch, copy button)
│ ├── ToolCallBlock.tsx # Tool call + diff display (word-level highlighting)
│ ├── TerminalBlock.tsx # Terminal output polling
│ ├── InputArea.tsx # Textarea, attachments, mentions, history
│ ├── InputToolbar.tsx # Config/mode/model selectors, usage, send button
│ ├── SuggestionPopup.tsx # Mention/command dropdown
│ ├── PermissionBanner.tsx # Permission request buttons
│ ├── ErrorBanner.tsx # Error/notification overlay
│ ├── SessionHistoryModal.tsx # Session history modal (list + confirm delete)
│ ├── FloatingButton.tsx # Draggable launch button
│ ├── SettingsTab.ts # Plugin settings UI
│ ├── view-host.ts # IChatViewHost interface
│ └── shared/
│ ├── IconButton.tsx # Icon button + Lucide icon wrapper
│ ├── MarkdownRenderer.tsx # Obsidian markdown rendering
│ └── AttachmentStrip.tsx # Attachment preview strip
├── utils/ # Shared utilities (pure functions)
│ ├── platform.ts # Shell, WSL, Windows env, command building
│ ├── paths.ts # Path resolution, file:// URI
│ ├── error-utils.ts # ACP error conversion
│ ├── mention-parser.ts # @[[note]] detection/extraction
│ └── logger.ts # Debug-mode logger
├── plugin.ts # Obsidian plugin lifecycle, settings persistence
└── main.ts # Entry point
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.
- 1mo ago Changed · +3 lines · +76 tokens per session 3ee0950d20ea
- 1mo ago First seen · 345 lines · 4,581 tokens per session scan A 0d72a4a4bc64
obsidian-agent-client AGENTS.md is an instructions file published in the GitHub repository RAIT-09/obsidian-agent-client (2,457 stars, last pushed 9d ago), licensed Apache-2.0. It adds 4,657 tokens to every session, about $0.0186 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.
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.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.
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).