Borrowing it
Nothing to install: this file belongs to ardanlabs/kronk. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ardanlabs/kronk/main/.agents/default/skills/kronk-mcp/SKILL.mdgit clone --depth 1 https://github.com/ardanlabs/kronkWrote 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/ardanlabs/kronk/kronk-mcp)<a href="https://agentmods.dev/skills/ardanlabs/kronk/kronk-mcp"><img src="https://agentmods.dev/badge/skills/ardanlabs/kronk/kronk-mcp/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.
<a href="https://agentmods.dev/skills/ardanlabs/kronk/kronk-mcp"><img src="https://agentmods.dev/badge/skills/ardanlabs/kronk/kronk-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Prompt Injection · line 13 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 15 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
- medium Prompt Injection · line 17 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 5.1 | $0.00095 | $0.00583 |
| Opus 5.5 | $0.00038 | $0.00233 |
| Sonnet 5.5 | $0.00019 | $0.00117 |
| Haiku 4.5 | $0.00010 | $0.00058 |
Grade A, and why
kronk-mcp scanned grade A with 1 finding 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 2mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- **Never** call `http://localhost:9000/mcp` directly via curl/wget. How it starts
The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Kronk MCP (default config)
Kronk MCP is registered directly with the host (server name kronk
or Kronk). No rote layer.
Tool selection
| Operation | Use |
|---|---|
| Web research | web_search (no host alternative) |
| Modify an existing file | Host's native edit/replace first; only on exact-match failure (whitespace, line-endings, indentation drift) call fuzzy_edit |
| Create / read / shell | Host's native tools — not fuzzy_edit |
fuzzy_edit is a fallback. Don't reach for it pre-emptively.
Hard rules
- Never call
http://localhost:9000/mcpdirectly via curl/wget. - Try the host's native edit tool first. Only call
fuzzy_editafter exact-match fails. - If a tool returns
is_error: true, stop and report. Do not retry blindly or improvise an alternative transport.
Tool names per host
- OpenCode, Kilo: prefixed →
kronk_fuzzy_edit,kronk_web_search. - Pi (
directTools: true): bare →fuzzy_edit,web_search.
If unsure, list the host's available tools and match by suffix.
fuzzy_edit schema
| Field | Meaning |
|---|---|
file_path |
Absolute path to existing file. |
old_string |
Exact text to replace (unique). |
new_string |
Replacement text. |
Workflow: Read the file → pick a uniquely identifiable
old_string (add 1–2 lines of context if ambiguous) → call
fuzzy_edit → re-Read to verify.
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.
- 2mo ago First seen · 58 lines · 95 tokens per session scan A 2a915f346272
kronk-mcp is a skill published in the GitHub repository ardanlabs/kronk (864 stars, last pushed yesterday), licensed Apache-2.0. It adds 95 tokens to every session and 583 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
kronk-mcp compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| kronk-mcpardanlabs/kronk | Skill | 864 | yesterday | Apache-2.0 | A | 95 | Claude Code, Codex |
| pinchtab-mcppinchtab/pinchtab | Skill | 11k | 10d ago | MIT | A | 52 | Claude Code, Codex |
| pinchtab-stealth-scorepinchtab/pinchtab | Skill | 11k | 10d ago | MIT | A | 168 | Claude Code, Codex |
| octo-docsMininglamp-OSS/octo-cli | Skill | 922 | yesterday | Apache-2.0 | A | 101 | Claude Code, Codex |
| gmeasureonsi/gomega | Skill | 2.4k | 28d ago | MIT | A | 129 | Claude Code |
| bex-background-workersbex-co/bex | Skill | 577 | today | Apache-2.0 | A | 118 | Claude Code, Codex |
| sentry-go-sdkgetsentry/sentry-for-ai | Skill | 275 | yesterday | MIT | A | 78 | Claude Code |