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/ychampion/cskill-agents/cli-command-surface-auditnpx skills add ychampion/cskill-agents --skill cli-command-surface-auditgit clone --depth 1 https://github.com/ychampion/cskill-agentsWhat 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 | $0.00030 | $0.00433 |
| Opus 5 | $0.00015 | $0.00217 |
| Sonnet 5 | $0.00006 | $0.00087 |
| Haiku 4.5 | $0.00003 | $0.00043 |
Grade A, and why
cli-command-surface-audit 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.
How it starts
The opening of the file, as written. The whole thing — 30 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: CLI Command Surface Audit
Domain: command-surfaces
Trigger: Use when adding, migrating, or debugging commands or slash-command skills in a coding CLI that builds its surface from multiple registries.
Source Pattern: Distilled from reviewed command-surface, help-menu, and execution-path consistency implementations.
Core Method
Audit the entire command surface, not just the handler. Confirm where the command is registered, how it is filtered, how it is described to users, and which runtime modes can actually execute it. Check help output, skill pickers, slash-command lookup, remote-safe filtering, and user-invocable flags against the real execution path. A command is only complete when the same name, description, permissions, and invocation contract stay aligned across all of those layers.
Key Rules
- Verify both visibility and executability; a command that only exists in code is still broken.
- Audit registration order and source precedence before debugging the handler itself.
- Check feature gates, permission filters, and remote-safe filters separately because each can hide the command for a different reason.
- Keep the displayed description and argument hint consistent with the actual invocation contract.
- Exercise at least one real end-user invocation path after wiring the command in.
Example Application
If you add a new slash command to a coding CLI, trace it from registry construction to help output to command execution. Confirm it survives the feature gate, appears in the skill list with the right summary, remains visible in the modes that should expose it, and actually dispatches through the same runtime path the user will hit.
Anti-Patterns (What NOT to do)
- Don’t stop after the handler compiles; the command may still be absent from the visible surface.
- Don’t assume a help entry means the command is executable under the current permission or runtime mode.
- Don’t let multiple registries describe the same command differently.
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 · 30 lines · 30 tokens per session scan A e7eacd04c645
cli-command-surface-audit is a skill published in the GitHub repository ychampion/cskill-agents (36 stars, last pushed 5mo ago), licensed MIT. It adds 30 tokens to every session and 433 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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