tcaitoolkit: Instructions file for Codex

AGENTS.md

tcaitoolkit AGENTS.md is an instructions file for Codex, OpenCode from nitinbhide/tcaitoolkit. It costs 563 tokens per session, scanned C, original, Apache-2.0.

A project instruction document for AI coding agents working on the Thinking Craftsman AI Toolkit. It describes the repository layout, installation status, and folders containing agent skills and project-generation tools.

In plain words
What is it for?
Use it to understand this repository's structure and locate its documentation, agent skills, Python project generator, and related source files. The provided text does not include installation steps.
Why use it?
It gives an agent project-specific context before it edits code or documentation. It also separates instructions for agents from the README intended for human developers.

Instructions file for CodexOpenCode

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

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

Reuse

Borrowing it

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

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.

agentmods badge for tcaitoolkit AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/nitinbhide/tcaitoolkit/agents-md/github.svg)](https://agentmods.dev/instructions/nitinbhide/tcaitoolkit/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/nitinbhide/tcaitoolkit/agents-md"><img src="https://agentmods.dev/badge/instructions/nitinbhide/tcaitoolkit/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.

agentmods 80×15 button for tcaitoolkit AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/nitinbhide/tcaitoolkit/agents-md"><img src="https://agentmods.dev/badge/instructions/nitinbhide/tcaitoolkit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 563 This file is loaded in full into every session.
When invoked 563 The same file — it is already loaded in full.
Security scan C 1 finding. 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 $0.00563 $0.00563
Opus 5.5 $0.00225 $0.00225
Sonnet 5.5 $0.00113 $0.00113
Haiku 4.5 $0.00056 $0.00056

Measured 15d ago against content hash a4e73f6c4951, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

tcaitoolkit AGENTS.md scanned grade C with 1 finding 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 15d 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.

Encoded or obfuscated payloadhighSupply chain

base64 or hex that is decoded and executed hides what actually runs from anyone reading the file.

wsl.exe bash -lc "printf '%s' '$encoded' | base64 -d | bash"
AGENTS.md · 33 lines

How it starts

The opening of the file, as written. The whole thing — 33 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md for Thinking Craftsman AI Toolkit

This file is for AI Agents working on this project. README.md is for Humans working on this project.

Overview

This project is a set of utilities to help human software developers adopt AI Coding Agents in their existing or new projects. This is developed by Nitin Bhide

Project Structure

  • ./docs/ - documents folder
  • ./docs/agentskills/ - folder for specification and design documents of various Agent Skills
  • ./docs/docindex.md - index of specification and design documents.
  • ./agentic_cc/ - source of python cookie cutter to generate the folder structure for a new project. Use this when you want to start a new project with use of AI Coding Agents from the day one.
  • ./agentskills/ - Useful agent skills like grill-me, repo-nav, agent-audit, thinking-craftsman-skill for coding and code reviews etc.

Testing Bash Scripts from Windows with WSL

  • Windows checkouts may give shell scripts CRLF line endings, which can make WSL Bash fail with errors such as $'\r': command not found or a syntax error near in\r. Do not change tracked line endings just to test. Normalize temporary copies with sed 's/\r$//'.

  • If a script sources helpers or reads other files using paths relative to itself, copy the script and its dependencies to a temporary directory while preserving their relative directory structure. Invoke temporary scripts with bash "$tmp_dir/path/to/script.sh"; the copies may not have executable permissions.

  • For syntax checks, run bash -n on each normalized copy. For behavior checks, run the normalized script with bash against a temporary fixture and clean up the fixture afterward.

  • When launching a multiline Bash test from PowerShell, pass it to WSL as one argument. Encode the here-string before invoking wsl.exe to avoid PowerShell native-argument splitting or expansion:

    $encoded = [Convert]::ToBase64String([Text.Encoding]::UTF8.GetBytes($bashCmd))
    wsl.exe bash -lc "printf '%s' '$encoded' | base64 -d | bash"
    

Read the full file on GitHub · 33 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. 15d ago Changed · +1 lines · +20 tokens per session a4e73f6c4951
  2. 1mo ago Changed · +13 lines · +327 tokens per session scan A → C 69bfbb2dcb9b
  3. 1mo ago First seen · 19 lines · 216 tokens per session scan A c62ab7baddf3

Subscribe to this mod's changes

tcaitoolkit AGENTS.md is an instructions file published in the GitHub repository nitinbhide/tcaitoolkit (5 stars, last pushed today), licensed Apache-2.0. It adds 563 tokens to every session, about $0.0023 per session on Opus 5.5. A static security scan graded it C with 1 finding (encoded or obfuscated payload). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-14.

Related

tcaitoolkit AGENTS.md compared with instructions from other repositories

tcaitoolkit AGENTS.md next to 6 instructions from other repositories
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tcaitoolkit AGENTS.mdnitinbhide/tcaitoolkitInstructions file5todayApache-2.0C563Codex, OpenCode
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next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file275k2d agoMITA4,313Codex, OpenCode