agentmods.dev

regressGuard: Instructions file for Claude Code

CLAUDE.md

regressGuard CLAUDE.md is an instructions file for Claude Code from Bharath-code/regressGuard. It costs 1,318 tokens per session, scanned A, original, MIT.

Repository instructions for RegressGuard, a Go command-line tool and MCP server that compares an API against a known-good baseline to detect regressions.

In plain words
What is it for?
Use them when modifying RegressGuard, especially its baseline checks, commit blocking, MCP connection, user experience, tests, and documentation.
Why use it?
They tell contributors what to read first, how to judge changes, and which reliability and security issues matter most.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions subagents; mentions AGENTS.md.

This is Bharath-code/regressGuard's own configuration. It tells Claude Code how to work on regressGuard 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 regressGuard configures →

not rated 1repo changed 29d ago A scan 1,318 tokens original MIT
View source ↗ Bharath-code/regressGuard
Reuse

Borrowing it

Nothing to install: this file belongs to Bharath-code/regressGuard. 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/Bharath-code/regressGuard/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/Bharath-code/regressGuard

Made for: Claude Code.

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 regressGuard CLAUDE.md

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

agentmods 80×15 button for regressGuard CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/bharath-code/regressguard/claude-md"><img src="https://agentmods.dev/badge/instructions/bharath-code/regressguard/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,318 This file is loaded in full into every session.
When invoked 1,318 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 $0.01318 $0.01318
Opus 5.5 $0.00527 $0.00527
Sonnet 5.5 $0.00264 $0.00264
Haiku 4.5 $0.00132 $0.00132

Measured 29d ago against content hash 183712a8914a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

regressGuard 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 29d 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.

CLAUDE.md · 108 lines

How it starts

The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — RegressGuard

One-line: a single-binary Go CLI that records a known-good API baseline and blocks commits when an AI agent silently regresses it. Also an MCP server so the agent can verify its own work.

Read first

  • AGENTS.md — workflow, tech stack, project structure, CLI/UX/error/test conventions.
  • RegressGuard-PRD.md Section 11 — implementation source of truth (task tracker).
  • docs/staff-review-2026-06.md — current product review, verdict, and prioritized task breakdown with acceptance criteria.

AGENTS.md rules apply in full; this file does not restate them. On conflict, the PRD and AGENTS.md win.

Product verdict (2026-06-15): PURSUE (conditional)

Real, well-evidenced problem; high build quality; unique wedge = agent-native verification via MCP. Gated on three conditions before growth spend:

  1. Eliminate transient-error false positives (trust is the whole product).
  2. Calm-by-default UX (animations opt-in, instant default).
  3. Harden + test the MCP path; make the open-core/monetization story real.

Current priorities (see docs/staff-review-2026-06.md for acceptance criteria)

  • ✅ Done: P0 transient-error FP, P0 secret hygiene (verified), P1-2 MCP hardening + tests, P1-1 calm-by-default UX (animations opt-in via --celebrate), P1-3 scoring-semantics docs
    • warning-only routes excluded from "unchanged" count, P2-1 open-core positioning + docs/json-contract.md + docs/paid-layer-spec.md.
  • P2-2 (spec only, per AGENTS.md scope) — FastAPI/Django route-discovery spec for scanner, gated behind PRD change-control before any code.

Architecture quick map

  • internal/engine — test runner, route hitter, schema normalizer, diff (severity rules).
  • internal/checkrun — regressguard check pipeline (load snapshot, rerun, diff, render).
  • internal/snapshot — baseline read/write + field redaction.
  • internal/mcprun — exposes snapshot/check/status as MCP tools (strategic differentiator).
  • internal/ui — design system; all color via ui.Paint(), animations TTY-only.

Read the full file on GitHub · 108 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. 29d ago Changed · +53 lines · +534 tokens per session 183712a8914a
  2. 2mo ago First seen · 55 lines · 784 tokens per session scan A 116b4220fca0

Subscribe to this mod's changes

regressGuard CLAUDE.md is an instructions file published in the GitHub repository Bharath-code/regressGuard (1 stars, last pushed 27d ago), licensed MIT. It adds 1,318 tokens to every session, about $0.0053 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 2026-08-31.

Testing
Related

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).

microsoft/vscode · 9,715 tokens

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.

vercel/next.js · 7,461 tokens

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).

microsoft/vscode · 5,262 tokens

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.

langchain-ai/langchain · 4,680 tokens

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).

microsoft/vscode · 2,750 tokens

deno copilot-instructions.md

Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.

denoland/deno · 3,077 tokens