invalid

An agent configuration whose frontmatter is not valid. The input does not provide a usable description of its behavior.

In plain words
What is it for?
It is for testing how invalid agent definitions are handled.
Why use it?
Invalid configuration can prevent the agent from being loaded or used correctly.

Agent

Install

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.

agentmods
npx agentmods add agents/tailcallhq/forgecode/invalid
Clone the repo
git clone --depth 1 https://github.com/tailcallhq/forgecode
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 13 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00013
Opus 5 $0.00000 $0.00006
Sonnet 5 $0.00000 $0.00003
Haiku 4.5 $0.00000 $0.00001

Measured 2d ago against content hash 76862baab6b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

invalid 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 2d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • invalid — 100% identical, 0 lines differ
crates/forge_repo/src/fixtures/agents/invalid.md · 5 lines

What it actually says

This is not valid frontmatter.

Agent

Some content.

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. 2d ago First seen · 5 lines · 0 tokens per session scan A 76862baab6b7

Subscribe to this mod's changes

invalid is an agent published in the GitHub repository tailcallhq/forgecode (7,599 stars, last pushed 2d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 13 tokens. 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.