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 instructions/packmindhub/packmind/packmind-cli-use-case-structuregit clone --depth 1 https://github.com/PackmindHub/packmindWhat 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 | $0.00287 | $0.00287 |
| Opus 5 | $0.00143 | $0.00143 |
| Sonnet 5 | $0.00057 | $0.00057 |
| Haiku 4.5 | $0.00029 | $0.00029 |
Grade A, and why
packmind packmind-cli-use-case-structure.instructions.md 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
Standard: CLI Use Case Structure
Enforce clean separation between domain contracts and application logic in apps/cli use cases, ensuring use cases focus purely on business operations without presentation concerns like user output or ... :
- Base all use case interfaces on IPublicUseCase<Command, Response> from @packmind/types
- Create new error classes for domain-specific failure scenarios when existing errors do not apply
- Define Command and Response types in the same file as the use case interface
- Define use case interfaces in src/domain/useCases/ directory
- Document the errors that a use case can throw so handlers know which error types to catch
- Export error classes from individual files in src/domain/errors/ for reusability across use cases
- Implement use cases in src/application/useCases/ directory
- Keep use cases focused on business logic without any user output (no console logging, no outputError/outputSuccess calls)
- Name error classes descriptively to indicate the specific failure condition (e.g., PackageNotFoundError, AccessDenied, InvalidStandardFormat)
- Throw custom domain errors defined in src/domain/errors/ instead of generic Error instances
Full standard is available here for further request: CLI Use Case Structure
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 · 18 lines · 287 tokens per session scan A 980e0f5efb39
packmind packmind-cli-use-case-structure.instructions.md is an instructions file published in the GitHub repository PackmindHub/packmind (306 stars, last pushed 4d ago), licensed Apache-2.0. It adds 287 tokens to every session, about $0.0014 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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