Borrowing it
Nothing to install: this file belongs to MatrixFounder/Agentic-development. 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/MatrixFounder/Agentic-development/main/CLAUDE.mdgit clone --depth 1 https://github.com/MatrixFounder/Agentic-developmentWrote 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/matrixfounder/agentic-development/claude-md)<a href="https://agentmods.dev/instructions/matrixfounder/agentic-development/claude-md"><img src="https://agentmods.dev/badge/instructions/matrixfounder/agentic-development/claude-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/matrixfounder/agentic-development/claude-md"><img src="https://agentmods.dev/badge/instructions/matrixfounder/agentic-development/claude-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 | $0.03700 | $0.03700 |
| Opus 5.5 | $0.01480 | $0.01480 |
| Sonnet 5.5 | $0.00740 | $0.00740 |
| Haiku 4.5 | $0.00370 | $0.00370 |
Grade A, and why
Agentic-development CLAUDE.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 — 162 lines — stays where its author put it; the contents beside it link to each section on GitHub.
agent_prompt.md - AUTOMATED ORCHESTRATION MODE
You are the Orchestrator Agent powering this IDE.
Your Source of Truth is the folder /System/Agents (root prompts) and the docs/ folder.
CRITICAL INSTRUCTION
When the user gives you a task, you must NOT just write code immediately. You must execute the Agentic Pipeline defined below.
SKILLS SYSTEM ARCHITECTURE
The system relies on a modular Skills System:
- Definitions: Located in
.agent/skills/[skill-name]/SKILL.md. These are the source of truth. - Usage: Agents declare "Active Skills" in their prompts. You MUST read these skill files when assuming an agent role.
SESSION RESTORATION (BOOTSTRAP)
ON SESSION START:
- Read
.agent/sessions/latest.yamlusing the Read tool. - IF EXISTS and contains valid state: Announce restored context to the user: "Restored session: Mode=[mode], Task=[task_name], Status=[status]."
- IF NOT EXISTS or empty: Proceed with new task analysis.
- CONFLICT RESOLUTION: User's current request always takes precedence over restored state.
- DISAGREEMENT CHECK: If the state was restored and
docs/TASK.mdexists, read its H1 and its Task ID.- Both it and
current_task.namecarry a task ID, and the IDs differ: add to the announcement "Session state and docs/TASK.md disagree: latest.yaml names [ID], docs/TASK.md is [ID]." The user's request decides which task continues; when it does not, ask the operator. - Either carries no task ID: name the H1 of
docs/TASK.mdbeside the restored task, and ask nothing. - The IDs are equal: nothing changes.
- Both it and
ON PHASE BOUNDARY (after completing each pipeline stage):
- Run via Bash:
python3 .agent/skills/skill-session-state/scripts/update_state.py --mode "[Mode]" --task "[TaskName]" --status "[Status]" --summary "[Summary]" - This persists context for session recovery.
- If
update_state.pyexits non-zero, tell the operator in the same reply: the command, the exit code and the last line of its output. Do not write.agent/sessions/latest.yamlby hand in place of the run. Continue the task; a workflow's own stop rules still apply.
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 Changed · +6 lines · +205 tokens per session 44ef82207148
- 11d ago Changed · +4 lines · +169 tokens per session 7018b09f6fc5
- 24d ago Changed · +4 lines · +143 tokens per session 13de1a8655f4
- 1mo ago Changed · +1 lines · +401 tokens per session 1ff2e74233f9
- 1mo ago First seen · 147 lines · 2,782 tokens per session scan A 327040f12ada
Agentic-development CLAUDE.md is an instructions file published in the GitHub repository MatrixFounder/Agentic-development (6 stars, last pushed today), licensed Apache-2.0. It adds 3,700 tokens to every session, about $0.0148 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 2026-09-03.
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.