canary-edge-cases

canary-edge-cases is a command for Claude Code from bop-clocktower/canary. It costs 16 tokens per session (85 once invoked), scanned A, original, MIT.

A command that asks Canary’s edge-case discovery tool to list situations worth testing. It can work from a feature description, a function signature, or a test file.

In plain words
What is it for?
Use it when you want edge cases for a feature, function, or existing test suite from the command line.
Why use it?
It gives a quick way to find missing tests without manually starting a longer analysis workflow. The results help expose failures that normal success-case tests may miss.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the canary plugin — 22 skills, 13 commands, 8 agents, 4 hooks shipped together

Good fit Use it when you want edge cases for a feature, function, or existing test suite from the command line.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/bop-clocktower/canary/canary-edge-cases
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.

Clone the repo
git clone --depth 1 https://github.com/bop-clocktower/canary

Made for: Claude Code.

Or install canary, the plugin that ships this one along with the rest of its 22 skills, 13 commands, 8 agents, 4 hooks.

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 canary-edge-cases

README.md
[![agentmods](https://agentmods.dev/badge/commands/bop-clocktower/canary/canary-edge-cases.svg)](https://agentmods.dev/commands/bop-clocktower/canary/canary-edge-cases)
Your own site
<a href="https://agentmods.dev/commands/bop-clocktower/canary/canary-edge-cases"><img src="https://agentmods.dev/badge/commands/bop-clocktower/canary/canary-edge-cases.svg" alt="Measured on agentmods" height="20"></a>
Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 85 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00016 $0.00085
Opus 5 $0.00008 $0.00043
Sonnet 5 $0.00003 $0.00017
Haiku 4.5 $0.00002 $0.00009

Measured 8d ago against content hash 7c03d8bdf205, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

canary-edge-cases 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 8d 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.

commands/canary-edge-cases.md · 12 lines

What it actually says

canary-edge-cases

Use the canary-edge-case-discovery agent to surface edge cases.

$ARGUMENTS

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. 8d ago First seen · 12 lines · 16 tokens per session scan A 7c03d8bdf205

Subscribe to this mod's changes

canary-edge-cases is a command published in the GitHub repository bop-clocktower/canary (4 stars, last pushed today), licensed MIT. It adds 16 tokens to every session and 85 once invoked, about $0.0001 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 2026-08-31.