BC youtube-subtitle-burner
下载 YouTube 视频到本地，提取 word-level 时间轴，翻译为中文，用 PIL 逐帧烧录字幕到视频画面。支持 2x 超采样抗锯齿消除文字锯齿。适用于横屏和竖屏视频。最终输出带中文字幕的 H.264 MP4 文件，可直接上传到国内平台。
下载 YouTube 视频到本地，提取 word-level 时间轴，翻译为中文，用 PIL 逐帧烧录字幕到视频画面。支持 2x 超采样抗锯齿消除文字锯齿。适用于横屏和竖屏视频。最终输出带中文字幕的 H.264 MP4 文件，可直接上传到国内平台。
As a process C 53/100 · Has gaps — weak spots: result and completion, when it triggers, inputs and preconditions
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 contains commands that delete files, rewrite disks or execute code fetched from the network. The agent may run them without asking if it believes the instructions require it.
Replace destructive commands with safe equivalents that ask for confirmation, scope them to one folder, and stop piping curl into a shell: pin a version and a checksum.
How to improve
- Say in the description WHEN to use the skill ("use when…", example requests): that is the agent's main cue.
- 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 · 2
✓ No critical or high findings
Medium and low: 2
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medium Dangerous commands
cmd-pipe-to-shell-known-hostSKILL.md:25Pipe-to-shell installer from a well-known host (still executes remote code)curl -LsSf https://astral.sh/uv/install.sh | sh
-
low Dangerous commands
cmd-pipe-to-shell-known-hostscripts/burn_subtitles.py:27Pipe-to-shell installer from a well-known host (still executes remote code) (string literal in code, not executed)- uv installed (curl -LsSf https://astral.sh/uv/install.sh | sh)
code literal
Files scanned: 2. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
- warning
description-no-whendescription does not say WHEN to use the skill (no "use when") - note
frontmatter-keyunknown frontmatter key "slug" - note
frontmatter-keyunknown frontmatter key "displayName" - note
frontmatter-keyunknown frontmatter key "summary"
Process rating: all ten parameters 53/100
- 0Result and completion. Does not say what the result is
- 0Inputs and preconditions. Does not say what the process needs to start
- 0Failures and branches. Linear process with no failure handling
- 0Progress reporting. Says nothing while it works
- 20When it triggers. No condition that starts the skill
- 100Tools and files. Tools declared in frontmatter
- 100Steps. 11 steps
- 100Consistency. Name and required fields are in place
- 100Execution cost. Instruction body is 1383 tokens
- 100Running it twice. No mutating operations
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 124: enough signal without eating the budget
- +4Structure: 19 headings
- +3Step-by-step instructions: 11 items
- +4Has examples (13 code blocks)
- +3All 3 scripts are documented
- +1License stated
Quality base 70; lint remarks subtract, signals add up to 100. Result: 71.