BC post-bridge
Create, schedule, and manage social media posts across Instagram, TikTok, YouTube, X, LinkedIn, Facebook, Pinterest, Threads, and Bluesky via the Post Bridge API. Covers media upload, post creation, scheduling, platform-specific configs, draft mode, analytics, and post result tracking.
As a process C 56/100 · 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 instructions or scripts send data out: environment variables, keys, file contents, chat history. You may never notice, because the agent performs the upload as "part of the task".
If the upload is not needed for the task, remove it: catalogs flag such skills and delist them. If it is needed, name the destination explicitly, say what leaves the machine, and give the user a switch.
How to improve
- Say in the description WHEN to use the skill ("use when…", example requests): that is the agent's main cue.
- The SKILL.md body is over 5,000 tokens: move reference detail into references/ and load it when needed.
- 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 Exfiltration
exfil-send-secrets-to-urlskill-card.md:45Instruction to send secrets/history to an external endpoint (URL is a reference link, not a destination; the skill's own vendor host)- [Post Bridge API key settings](https://www.post-bridge.com/dashboard/api-keys)
reference linkvendor-host
Files scanned: 3. 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") - warning
body-longSKILL.md body ≈ 6601 tokens (recommended < 5000); move details to references/ - note
frontmatter-keyunknown frontmatter key "last-updated"
Process rating: all ten parameters 56/100
- 0Result and completion. Does not say what the result is
- 0Inputs and preconditions. Does not say what the process needs to start
- 20When it triggers. No condition that starts the skill
- 30Running it twice. 55 mutating operations with no state check
- 40Consistency. Frontmatter name (post-bridge) differs from the folder (post-bridge-social-manager)
- 70Execution cost. Instruction body is 6601 tokens
- 100Tools and files. Tools declared in frontmatter
- 100Steps. 74 steps
- 100Failures and branches. 7 branches, has a failure section
- 100Progress reporting. Reports progress
- low 12 top-level sections: this looks like several domains in one skill
- low The response is described with custom markup (6 tags): a typed call is more reliable
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
- +1No license
- +2Single-language instructions
- +3Description length 286: enough signal without eating the budget
- +4Structure: 23 headings
- +3Step-by-step instructions: 74 items
- +4Has examples (23 code blocks)
- +3All 1 scripts are documented
Quality base 70; lint remarks subtract, signals add up to 100. Result: 64.