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/digitallyinduced/ihp/claude-mdgit clone --depth 1 https://github.com/digitallyinduced/ihpWrote 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/digitallyinduced/ihp/claude-md)<a href="https://agentmods.dev/instructions/digitallyinduced/ihp/claude-md"><img src="https://agentmods.dev/badge/instructions/digitallyinduced/ihp/claude-md.svg" alt="Measured on agentmods" 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 | $0.03452 | $0.03452 |
| Opus 5 | $0.01726 | $0.01726 |
| Sonnet 5 | $0.00690 | $0.00690 |
| Haiku 4.5 | $0.00345 | $0.00345 |
Grade A, and why
ihp 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 4d 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 — 393 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Overview
IHP (Integrated Haskell Platform) is a batteries-included Haskell web framework built on Haskell and Nix. It follows an MVC architecture with type-safe routing, HSX templating (JSX-like syntax for HTML), and PostgreSQL as the database.
Development Environment Setup
IHP uses devenv.sh (a wrapper around nix develop and direnv) for development:
cd /path/to/ihp
direnv allow
Alternatively, use nix develop directly to enter a dev shell. You can also use direnv exec . to get a cached nix develop environment.
Running Tests
Prefer ghci for quick type checking and iteration — full nix builds (nix flake check) are slow. Use ghci interactively or via echo ... | ghci one-liners for fast feedback.
When using ghci, keep in mind that it expects input on stdin. If you don't provide any, ghci will never return. The echo ... | ghci pattern handles this correctly by piping input.
IHP IDE Tests (from the repo root):
# Interactive (allows :r to reload after changes):
ghci
:l ihp-ide/Test/Main.hs
main
:r
main
# One-liner:
echo -e ':l ihp-ide/Test/Main.hs\nmain' | ghci
All tests via Nix (slower but comprehensive):
nix flake check --impure
Verify a single module compiles:
echo ':l ihp-ide/IHP/IDE/CodeGen/MigrationGenerator.hs' | ghci
When adding new tests, add them to Test/Main.hs in the appropriate package.
Running the Dev Server (for local IHP development)
From the IHP directory with a host project:
export DEBUG=1 # Optional: enable debug logging
ghci
:l ihp-ide/exe/IHP/IDE/DevServer.hs
mainInParentDirectory
Project Structure
This is a monorepo with multiple Haskell packages:
| Package | Purpose |
|---|---|
ihp/ |
Core web framework (routing, controllers, views, models, validation) |
ihp-ide/ |
Development server, code generators, schema designer |
ihp-hsx/ |
HSX templating system (JSX-like HTML in Haskell) |
ihp-migrate/ |
Database migration tool |
ihp-datasync/ |
Real-time data synchronization via WebSockets |
ihp-graphql/ |
GraphQL API support |
ihp-hspec/ |
Testing utilities |
ihp-openai/ |
OpenAI integration |
ihp-ssc/ |
Server-side components |
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.
- 4d ago First seen · 393 lines · 3,452 tokens per session scan A 87016b7260d9
ihp CLAUDE.md is an instructions file published in the GitHub repository digitallyinduced/ihp (5,351 stars, last pushed 2d ago), licensed MIT. It adds 3,452 tokens to every session, about $0.0173 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 2026-08-30.
Other instructions, from other repositories
hyperframes CLAUDE.md
Claude Code instructions for heygen-com/hyperframes, covering hyperframes, skills, creation workflows, domain skills (loaded on demand) and skill catalog maintenance.
hyperframes AGENTS.md
AGENTS.md instructions for heygen-com/hyperframes, covering hyperframes, skills, build & test, linting & formatting and composition validation.
notes AGENTS.md
Instructions for sabertaz/notes, covering agents.md, project overview, development commands, content guidelines and commit guidelines.
notes CLAUDE.md
Instructions for sabertaz/notes, a project described as: :bookmark: Personal notes: today I learned.
jesse AGENTS.md
AGENTS.md instructions for jesse-ai/jesse, covering jesse repository guide for ai agents, skills, key characteristics, central framework and technology stack.
AgentEval copilot-instructions.md
Copilot instructions for AgentEvalHQ/AgentEval, covering agenteval - ai coding agent instructions, architecture overview, environment setup, optional: secondary models for comparison and build & test commands.