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 commands/thettwe/nyann/diff-profilegit clone --depth 1 https://github.com/thettwe/nyannWhat 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 | $0.00042 | $0.00479 |
| Opus 5 | $0.00021 | $0.00239 |
| Sonnet 5 | $0.00008 | $0.00096 |
| Haiku 4.5 | $0.00004 | $0.00048 |
Grade A, and why
nyann:diff-profile 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
Plugin root: This is a Claude Code plugin, NOT a CLI tool. Do NOT
search via which, npm list, pip list, or brew list. This file
is at <plugin_root>/commands/. All scripts: <plugin_root>/bin/.
Read the matching skills/*/SKILL.md for the full flow.
/nyann:diff-profile
Wraps bin/diff-profile.sh <from> <to> [--format human|json].
Shows a structured diff between two profiles, organized by section:
Stack:
primary_language: unknown → typescript
framework: null → next
Hooks:
[pre_commit]
+ lint-staged, eslint, prettier
[commit_msg]
(no changes)
Documentation:
scaffold_types: ["architecture","adrs"] → ["architecture","adrs","prd"]
claude_md_size_budget_kb: 3 → 5
Both arguments are bare profile names resolved via bin/load-profile.sh.
User, team, and starter profiles are all supported.
When to invoke
- "What's different between default and python-cli?" → run this.
- "What would change if I switch profiles?" → resolve current profile from CLAUDE.md, then diff current vs target.
- "Compare these two profiles" → run this.
See also
/nyann:inspect-profile— inspect a single profile in detail./nyann:migrate-profile— actually switch from one profile to another./nyann:retrofit— apply profile changes to the repo.
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 · 61 lines · 42 tokens per session scan A 4eb1b55e9696
nyann:diff-profile is a command published in the GitHub repository thettwe/nyann (6 stars, last pushed 3d ago), licensed MIT. It adds 42 tokens to every session and 479 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 2026-08-31.
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check-state
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