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/aterdev/perigon.cli/codegennpx skills add AterDev/Perigon.CLI --skill codegengit clone --depth 1 https://github.com/AterDev/Perigon.CLIWhat 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 | $0.00053 | $0.00314 |
| Opus 5 | $0.00026 | $0.00157 |
| Sonnet 5 | $0.00011 | $0.00063 |
| Haiku 4.5 | $0.00005 | $0.00031 |
Grade A, and why
codegen 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
Code Generation
Workflow
- Inspect the relevant generator in
src/CodeGenerator/Generate. - Inspect helpers in
src/CodeGenerator/Helperbefore adding parsing logic. - Inspect templates in
src/CodeGenerator/Templateswhen output text changes. - Inspect regression tests in
tests/StudioMod.Tests/Generate.
Conventions
- Prefer Roslyn APIs for C# syntax, symbols, namespaces, usings, attributes, and type analysis.
- Prefer
Microsoft.OpenApiAPIs for OpenAPI traversal, schemas, and operations. - Keep parsing/model extraction in helpers and emitted output composition in generators or templates.
- Avoid brittle string parsing when a structured API is available.
- Keep generated output deterministic: stable ordering, whitespace, using lists, and no machine-specific paths.
- Use raw string literals for embedded multi-line generated source.
- Be careful around nullable values, enums, file uploads, path/query/body parameter placement, and special OpenAPI names.
Tests
- Add focused tests under
tests/StudioMod.Tests/Generate. - Use fixture OpenAPI files under
tests/StudioMod.Tests/Generate/Fixtures. - For Roslyn helpers, use small source snippets that exercise the syntax or semantic case.
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 · 30 lines · 53 tokens per session scan A 854da80481c9
codegen is a skill published in the GitHub repository AterDev/Perigon.CLI (53 stars, last pushed 3d ago), licensed Apache-2.0. It adds 53 tokens to every session and 314 once invoked, about $0.0003 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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