Borrowing it
Nothing to install: this file belongs to outlmd/outl. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/outlmd/outl/main/.claude/commands/check-invariants.mdgit clone --depth 1 https://github.com/outlmd/outlWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/outlmd/outl/check-invariants)<a href="https://agentmods.dev/commands/outlmd/outl/check-invariants"><img src="https://agentmods.dev/badge/commands/outlmd/outl/check-invariants.svg" alt="Measured on agentmods" height="20"></a>What 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 5.1 | $0.00026 | $0.00212 |
| Opus 5 | $0.00013 | $0.00106 |
| Sonnet 5 | $0.00005 | $0.00042 |
| Haiku 4.5 | $0.00003 | $0.00021 |
Grade A, and why
check-invariants 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 6d 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
Run in sequence:
cargo test -p outl-core --test convergence -- --nocapture
cargo test -p outl-core --test cycle
cargo test -p outl-core --test cycle_chain
cargo test -p outl-core --test concurrent_edit_move
cargo test -p outl-core --test concurrent_delete_edit
cargo test -p outl-core --test late_op
cargo test -p outl-core --test idempotency
cargo test -p outl-core --test fractional_index
cargo test -p outl-core --test large_log
cargo test -p outl-core --test property_based
Stop on the first failure. Report the exact failure output.
If they all pass, finish by invoking the crdt-invariant-checker agent for extra validation (coverage + static diff).
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.
- 6d ago First seen · 25 lines · 26 tokens per session scan A 2b0284a13e78
check-invariants is a command published in the GitHub repository outlmd/outl (172 stars, last pushed 2d ago), licensed MIT. It adds 26 tokens to every session and 212 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 2026-09-01.
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