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/mumez/smalltalk-dev-plugin/st-validatenpx skills add mumez/smalltalk-dev-plugin --skill st-validategit clone --depth 1 https://github.com/mumez/smalltalk-dev-pluginWhat 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 | $0.00047 | $0.00269 |
| Opus 5 | $0.00023 | $0.00134 |
| Sonnet 5 | $0.00009 | $0.00054 |
| Haiku 4.5 | $0.00005 | $0.00027 |
Grade A, and why
st-validate 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.
What it actually says
Validate Tonel Syntax
Validate Tonel .st files before importing to the Smalltalk image. Modern AI usually generates correct Tonel, so this is optional.
Usage
/st-validate /absolute/path/to/MyClass.st # validate a file
/st-validate 'Tonel source text' # validate content directly
Steps
- Call
validate_tonel_smalltalk_from_filefor a file path, orvalidate_tonel_smalltalkfor raw content - Report any syntax errors or confirm the file is valid
Notes
- Use
validate_smalltalk_method_bodyto validate a single method body in isolation - Validation errors must be fixed before importing
Examples
/st-validate /home/user/project/src/MyPackage/MyClass.st
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.
- 2d ago First seen · 33 lines · 47 tokens per session scan A 7d4e2a778a9f
st-validate is a skill published in the GitHub repository mumez/smalltalk-dev-plugin (15 stars, last pushed 6d ago), licensed MIT. It adds 47 tokens to every session and 269 once invoked, about $0.0002 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 2026-08-30.
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