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 skills/xdido/chiron/challengenpx skills add xDido/chiron --skill challengegit clone --depth 1 https://github.com/xDido/chironWrote 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/skills/xdido/chiron/challenge)<a href="https://agentmods.dev/skills/xdido/chiron/challenge"><img src="https://agentmods.dev/badge/skills/xdido/chiron/challenge.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 | $0.00043 | $0.08311 |
| Opus 5 | $0.00022 | $0.04156 |
| Sonnet 5 | $0.00009 | $0.01662 |
| Haiku 4.5 | $0.00004 | $0.00831 |
Grade D, and why
challenge scanned grade D with 2 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 5d 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.
Tells the agent never to refusehighAnti-refusal
Suppressing the ability to decline removes a core safety control; a later harmful request then succeeds.
The bias is a **preference, not a requirement**. If the user explicitly requests a specific pattern (*"drill me on X"*), honor it regardless of mastery status — anti-pattern #2 (never refuse) applies here. Strips warnings and disclaimersmediumAnti-refusal
Omitting safety caveats hides risk from the user and is a common jailbreak preamble.
1. **Do not moralize.** No "you should have", no guilt. Grades are feedback, not judgment. How it starts
The opening of the file, as written. The whole thing — 489 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/challenge — hero feature: drills from your own code
Step 0 — Load project context
Check if .chiron-context.md exists in the project root.
If it exists: Read it. This file is your complete project reference. DO NOT scan the codebase, list directories, or re-read config files. The only additional file you read is the target source file from Step 1. Proceed to Step 1.
If it does NOT exist: Tell the user: "No project context found. Run /teach-chiron first." Then stop.
┌──────────────────────────────────────────────┐
│ /challenge │
├──────────────────────────────────────────────┤
│ REQUIRES .chiron-context.md │
│ Run /teach-chiron once to generate it │
├──────────────────────────────────────────────┤
│ CORE (always active) │
│ ✓ Language pack seeded pattern matching │
│ ✓ Eyeball fallback for unmatched files │
│ ✓ /10 grading + profile logging │
├──────────────────────────────────────────────┤
│ ENHANCED (with rich project context) │
│ + Project-aware drill targeting │
│ + Concept pack auto-detection from imports │
│ + Convention-aligned grading feedback │
└──────────────────────────────────────────────┘
/challenge reads a source file, finds 1–3 concrete practice targets grounded in specific lines, and presents them as short drills you can complete in 5–15 minutes. Each drill is tied to an idiom from the language pack. Your attempts get graded /10 with honest, specific feedback.
Usage
/challenge— drill on the current file in focus/challenge path/to/file.go— drill on a specific file/challenge functionName— locate the named function in the current file and drill on it
The arguments
$ARGUMENTS
CRITICAL — user instructions always win
Before anything else, check .agents/README.md. If user instructions conflict with this command's behavior — e.g., "just fix my code directly, don't drill me" — follow the user. Switch to a direct fix-and-explain mode, skip drill generation, and don't write to the profile file.
What ships with it
22 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- packs/api-design.md 12 KB
- packs/caching.md 16 KB
- packs/concurrency.md 18 KB
- packs/configuration.md 14 KB
- packs/csharp.md 8.5 KB
- packs/database.md 11 KB
- packs/go.md 9.6 KB
- packs/java.md 8.4 KB
- packs/javascript.md 7.9 KB
- packs/kotlin.md 8.1 KB
- packs/messaging.md 15 KB
- packs/observability.md 16 KB
- packs/python.md 8.4 KB
- packs/realtime.md 17 KB
- packs/reliability.md 15 KB
- packs/rust.md 8.8 KB
- packs/security.md 12 KB
- packs/storage.md 17 KB
- packs/swift.md 8.2 KB
- packs/testing.md 15 KB
- packs/typescript.md 8.7 KB
- references/grading-rubric.md 4.1 KB
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.
- 5d ago First seen · 489 lines · 43 tokens per session scan D 7e2e4c6e0983
challenge is a skill published in the GitHub repository xDido/chiron (2 stars, last pushed 4mo ago), licensed MIT. It adds 43 tokens to every session and 8,311 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it D with 2 findings (tells the agent never to refuse, strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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