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/azure/azure-sdk-for-rust/check-spellingnpx skills add Azure/azure-sdk-for-rust --skill check-spellinggit clone --depth 1 https://github.com/Azure/azure-sdk-for-rustWhat 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 | $0.00016 | $0.00474 |
| Opus 5 | $0.00008 | $0.00237 |
| Sonnet 5 | $0.00003 | $0.00095 |
| Haiku 4.5 | $0.00002 | $0.00047 |
Grade A, and why
check-spelling 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 yesterday.
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
Spell checking
Usage
Get all staged and unstaged non-deleted files, then pipe them to the spell check script:
{ git diff --staged --name-only --diff-filter=d; git diff --name-only --diff-filter=d; } | sort -u | ./eng/common/spelling/Invoke-Cspell.ps1
Configuration
The root configuration is .vscode/cspell.json, and CI runs cSpell with this config via eng/common/spelling/Invoke-Cspell.ps1.
Each service directory (e.g., sdk/{service-directory}) or crate directory (e.g., sdk/{service-directory}/{crate-directory}) can have a .cspell.json that should import either a parent .cspell.json or .vscode/cspell.json from the root of the repo. Per-directory configs are loaded based on the paths of files being checked.
Fix spelling
Show a summary of the misspellings to the user. Prompt the user for which words should be replaced and which should be ignored.
For words that should be replaced, fix the misspellings directly in the source files. If you cannot confidently determine the correct spelling, ask the user.
For words that should be ignored, add them to the ignoreWords array in a .cspell.json file under sdk/{service-directory} or lower. If the file doesn't exist, create it with an import of either a parent .cspell.json or ../../.vscode/cspell.json from the root of the repo.
Example sdk/keyvault/.cspell.json:
{
"import": [
"../../.vscode/cspell.json"
],
"ignoreWords": [
"ciphertext",
"purgeable"
]
}
Seldom used words can be ignored within the file they are used by adding an appropriate comment e.g.:
// cspell:ignore {word}
To disable cSpell for just the next line, use cspell:disable-next-line.
Testing
Run the same command again used to check spelling. All misspellings should be fixed.
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.
- yesterday First seen · 55 lines · 16 tokens per session scan A c9ac7353bd26
check-spelling is a skill published in the GitHub repository Azure/azure-sdk-for-rust (885 stars, last pushed 3d ago), licensed MIT. It adds 16 tokens to every session and 474 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 2026-08-30.
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