web-component-library: Instructions file for Codex

AGENTS.md

web-component-library AGENTS.md is an instructions file for Codex, OpenCode from justifi-tech/web-component-library. It costs 573 tokens per session, scanned A, original, MIT.

Repository-specific instructions for a web-component library, including how its written specifications control implementation and how its work and history files track progress.

In plain words
What is it for?
Use them when implementing ready specifications, auditing code against specifications, recording completed work, or updating the project’s prescribed workflow.
Why use it?
They prevent code from being built on outdated or incorrect assumptions and define the checks for choosing and completing work items.

Instructions file for CodexOpenCode

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

This is justifi-tech/web-component-library's own configuration. It tells Codex and OpenCode how to work on web-component-library 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 web-component-library configures →

Reuse

Borrowing it

Nothing to install: this file belongs to justifi-tech/web-component-library. 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/justifi-tech/web-component-library/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/justifi-tech/web-component-library

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 web-component-library AGENTS.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/justifi-tech/web-component-library/agents-md"><img src="https://agentmods.dev/badge/instructions/justifi-tech/web-component-library/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/justifi-tech/web-component-library/agents-md"><img src="https://agentmods.dev/badge/instructions/justifi-tech/web-component-library/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 573 This file is loaded in full into every session.
When invoked 573 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 $0.00573 $0.00573
Opus 5.5 $0.00229 $0.00229
Sonnet 5.5 $0.00115 $0.00115
Haiku 4.5 $0.00057 $0.00057

Measured 6d ago against content hash 9989b637fc81, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

web-component-library 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 6d 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.

AGENTS.md · 34 lines

How it starts

The opening of the file, as written. The whole thing — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.

web-component-library Agent Guidelines

Build & Test

  • All package scripts are allowed. format (rewrites every .ts/.tsx/.md) and clean (deletes node_modules) have wide blast radius — announce before running either
  • Run pnpm --filter @justifi/webcomponents test for the unit test suite (Stencil + Jest); root pnpm test also works but builds first
  • Run pnpm test:e2e for Playwright E2E tests — it starts the example server itself if :3000 is free
  • Run pnpm dev:server to bring up the Stencil watcher + examples server for live component work; it never exits, so background it
  • Run pnpm lint for ESLint across all packages (--max-warnings 0)
  • Validate with both unit and E2E tests when changes affect component behavior
  • When working on E2E tests, read apps/component-examples/e2e/README.md first

Conventions

  • Stack: TypeScript + Stencil v4 (web components), pnpm monorepo with Turborepo
  • Component tags: kebab-case (justifi-order-terminals, form-control-text)
  • Component classes: PascalCase (JustifiOrderTerminals, FormControlText)
  • Customer-facing components: prefixed with justifi- and have shadow DOM enabled. Internal components don't.
  • Files: kebab-case, co-located with tests (component-name.tsx + component-name.spec.tsx)
  • Functions/variables: camelCase (formatCurrency, makeGetBusiness)
  • Entity models: PascalCase classes wrapping API responses (new Business(data))
  • CSS parts: kebab-case strings defined in src/styles/parts.ts
  • Imports order: Stencil core → UI components → utils → API/services → actions → styles (all relative paths, no aliases)
  • Data fetching: Curried action factories (makeGetBusiness) with onSuccess/onError callbacks
  • Error handling: ComponentErrorCodes enum + error-event emission via @Event() decorator
  • State: Stencil @State() for local, Stencil Store for shared state
  • Testing: newSpecPage() + snapshot tests for units; Playwright for E2E

Read the full file on GitHub · 34 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. 6d ago Changed · +1 lines · +74 tokens per session 9989b637fc81
  2. 1mo ago Changed · -36 lines · -550 tokens per session 6585862649ec
  3. 2mo ago First seen · 69 lines · 1,049 tokens per session scan A 382c11f2bf42

Subscribe to this mod's changes

web-component-library AGENTS.md is an instructions file published in the GitHub repository justifi-tech/web-component-library (5 stars, last pushed yesterday), licensed MIT. It adds 573 tokens to every session, about $0.0023 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.

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