BF avatar-runtime
Embeds and controls a virtual avatar using the avatar-runtime npm package. Provides Live2D rendering, VRM 3D, vector fallback, and control-driven expression/body/scene animation via a provider-agnostic session bridge. Use when the user asks for a virtual avatar, face-control animation, Live2D character, avatar widget embedding, or when starting/stopping an avatar session.
As a process F 56/100 · Will not run — References files that are not bundled: scripts/ensure-default-vrm-sample.sh, scripts/ensure-default-live2d-sample.sh, assets/vrm/slot/default.vrm
What is at stake
Medium-severity findings: the skill is probably honest, but read what alarmed the scanner.
Below is the worst case for this category. The finding here is medium: the guard saw a sign, not a proof.
The skill asks for more than the task needs: broad tool access, credential environment variables, binaries. Every extra permission widens the damage from a mistake or a compromise.
Narrow allowed-tools and the variable list to the minimum; replace binaries with readable sources or scripts.
How to improve
- The text references files that are not there: add them or drop the references.
- Your own cases (evals/evals.json, 4–6 real requests with expected answers): the full check would then run those instead of a model-drafted suite.
- A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.
Guard findings · 1
✓ No critical or high findings
Medium and low: 1
-
medium Broad scope
meta-broad-allowed-toolsSKILL.md:1Broad tool permissions pre-approved: Bash(curl:*)allowed-tools: Bash(node:*) Bash(curl:*) Bash(npm:*) Bash(bash:*)
Files scanned: 3. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- warning
missing-refreference to a missing file: scripts/ensure-default-vrm-sample.sh - warning
missing-refreference to a missing file: scripts/ensure-default-live2d-sample.sh - warning
missing-refreference to a missing file: assets/vrm/slot/default.vrm - warning
missing-refreference to a missing file: assets/live2d/slot/ - note
frontmatter-keyunknown frontmatter key "env-vars"
Process rating: all ten parameters 56/100
- 0Tools and files. 4 referenced file(s) missing: scripts/ensure-default-vrm-sample.sh, scripts/ensure-default-live2d-sample.sh, assets/vrm/slot/default.vrm
- 0Result and completion. Does not say what the result is
- 0Progress reporting. Says nothing while it works
- 30Running it twice. 2 mutating operations with no state check
- 70When it triggers. States when to use, but not when not to
- 70Inputs and preconditions. Inputs and preconditions are listed
- 100Steps. 9 steps
- 100Failures and branches. 1 branches, has a failure section
- 100Consistency. Name and required fields are in place
- 100Execution cost. Instruction body is 2905 tokens
- medium Safety rules and hard prohibitions inside a skill: they belong in the system prompt, here they protect nothing
- low 15 top-level sections: this looks like several domains in one skill
Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.
Quality signals
- +5Description has no quoted example phrases that should trigger the skill
- +4Description does not say when NOT to use the skill (false activations)
- +3Output format is not stated: the model decides each time
- -2localhost URLs: will not work for another user
- +2Single-language instructions
- +3Description length 374: enough signal without eating the budget
- +4Structure: 18 headings
- +3Step-by-step instructions: 9 items
- +4Has examples (16 code blocks)
- +4Reference files are cited in the instructions (1 of 1)
- +1License stated
Quality base 70; lint remarks subtract, signals add up to 100. Result: 74.