Borrowing it
Nothing to install: this file belongs to kavo-labs/kavo. 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/kavo-labs/kavo/main/.claude/skills/add-operation/SKILL.mdgit clone --depth 1 https://github.com/kavo-labs/kavoWrote 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/skills/kavo-labs/kavo/add-operation)<a href="https://agentmods.dev/skills/kavo-labs/kavo/add-operation"><img src="https://agentmods.dev/badge/skills/kavo-labs/kavo/add-operation/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/kavo-labs/kavo/add-operation"><img src="https://agentmods.dev/badge/skills/kavo-labs/kavo/add-operation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Prompt Injection · line 20 Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
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 | $0.00051 | $0.02608 |
| Opus 5.5 | $0.00020 | $0.01043 |
| Sonnet 5.5 | $0.00010 | $0.00522 |
| Haiku 4.5 | $0.00005 | $0.00261 |
Grade A, and why
add-operation 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 1mo 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 — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Adding an operation
The whole point of Kavo's design is that adding an operation is adding a
registry entry (ADR-0006). The engine loops over registry entries and
@kavo/nest generates one route per enabled entry from the same registry. If
your change needs a new if in the engine or in the route generator, the design
is wrong — stop and reconsider.
Decide which of the four you are doing
The first three are the same mechanism (EntityConfig in
packages/core/src/config/entity-config.ts); the fourth is @kavo/nest-only
and doesn't touch EntityConfig at all:
| Intent | How |
|---|---|
| Disable a standard operation | operations: { deleteOne: false } — the entry stays in the registry so tooling can report it, but calling it raises OperationDisabledException and no route is generated. |
| Override a standard operation (data) | operations: { findOne: { handler } } — a plain OperationHandler object replaces the handler; keeps the default DTO and serialization scaffolding. |
| Add a custom operation | operations: { markPaidOne: { handler, meta: { routes } } } (issue #145): any key outside the standard eight. kind/cardinality default to a single-row write; schema gives it a shape of its own. handler is optional (issue #424) — omit it only when an @Override method supplies the implementation (see below); otherwise it is required. |
| Override a standard operation (code) | @Override(operationId?) (issue #23) — a controller method is the implementation; @Kavo still generates the route from the registry. See below. |
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.
- 1mo ago Changed c6f950476440
- 1mo ago Changed · +4 lines 25981ebba002
- 1mo ago Changed · +12 lines 6cf1e00db61b
- 1mo ago First seen · 176 lines · 51 tokens per session scan A da5701ace224
add-operation is a skill published in the GitHub repository kavo-labs/kavo (17 stars, last pushed today), licensed MIT. It adds 51 tokens to every session and 2,608 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-02.
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