# Send Arc Skill Differ to your agent Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually. ## Fast path - Download the package from Yavira. - Extract it into a folder your agent can access. - Paste one of the prompts below and point your agent at the extracted folder. ## Suggested prompts ### New install ```text I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete. ``` ### Upgrade existing ```text I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run. ``` ## Machine-readable fields ```json { "schemaVersion": "1.0", "item": { "slug": "arc-skill-differ", "name": "Arc Skill Differ", "source": "tencent", "type": "skill", "category": "其他", "sourceUrl": "https://clawhub.ai/Trypto1019/arc-skill-differ", "canonicalUrl": "https://clawhub.ai/Trypto1019/arc-skill-differ", "targetPlatform": "OpenClaw" }, "install": { "downloadUrl": "/downloads/arc-skill-differ", "sourceDownloadUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=arc-skill-differ", "sourcePlatform": "tencent", "targetPlatform": "OpenClaw", "packageFormat": "ZIP package", "primaryDoc": "SKILL.md", "includedAssets": [ "SKILL.md", "scripts/differ.py" ], "downloadMode": "redirect", "sourceHealth": { "source": "tencent", "slug": "arc-skill-differ", "status": "healthy", "reason": "direct_download_ok", "recommendedAction": "download", "checkedAt": "2026-04-29T03:07:18.497Z", "expiresAt": "2026-05-06T03:07:18.497Z", "httpStatus": 200, "finalUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=arc-skill-differ", "contentType": "application/zip", "probeMethod": "head", "details": { "probeUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=arc-skill-differ", "contentDisposition": "attachment; filename=\"arc-skill-differ-1.0.0.zip\"", "redirectLocation": null, "bodySnippet": null, "slug": "arc-skill-differ" }, "scope": "item", "summary": "Item download looks usable.", "detail": "Yavira can redirect you to the upstream package for this item.", "primaryActionLabel": "Download for OpenClaw", "primaryActionHref": "/downloads/arc-skill-differ" }, "validation": { "installChecklist": [ "Use the Yavira download entry.", "Review SKILL.md after the package is downloaded.", "Confirm the extracted package contains the expected setup assets." ], "postInstallChecks": [ "Confirm the extracted package includes the expected docs or setup files.", "Validate the skill or prompts are available in your target agent workspace.", "Capture any manual follow-up steps the agent could not complete." ] } }, "links": { "detailUrl": "https://openagent3.xyz/skills/arc-skill-differ", "downloadUrl": "https://openagent3.xyz/downloads/arc-skill-differ", "agentUrl": "https://openagent3.xyz/skills/arc-skill-differ/agent", "manifestUrl": "https://openagent3.xyz/skills/arc-skill-differ/agent.json", "briefUrl": "https://openagent3.xyz/skills/arc-skill-differ/agent.md" } } ``` ## Documentation ### Skill Differ Compare two versions of an OpenClaw skill to find security-relevant changes before updating. ### Why This Exists A skill that was clean at v1.0 could add credential stealing in v1.1. The skill scanner catches known bad patterns in a single version. The differ catches new capabilities between versions — things a skill couldn't do before but can do now. ### Diff two skill directories python3 {baseDir}/scripts/differ.py diff --old ~/.openclaw/skills/some-skill/ --new /tmp/some-skill-v2/ ### Diff with JSON output python3 {baseDir}/scripts/differ.py diff --old ./v1/ --new ./v2/ --json ### Quick summary only (no file details) python3 {baseDir}/scripts/differ.py diff --old ./v1/ --new ./v2/ --summary ### New Capabilities Added Network access (skill didn't make HTTP requests before, now it does) Credential access (didn't read env vars or API keys before, now it does) File system access (wasn't touching home directory, now it is) Code execution patterns (eval/exec that didn't exist before) Data exfiltration (new outbound POST requests) Obfuscation (new encoded/obfuscated content) ### File Changes New files added (especially in scripts/) Deleted files (could remove safety checks) Modified files with security-relevant diffs ### Recommendations SAFE — No new security-relevant capabilities. Update freely. REVIEW — New capabilities detected. Read the changes before updating. BLOCK — Critical new capabilities (code execution, credential access). Manual audit required. ### Tips Always diff before updating any third-party skill Pair with skill-scanner: scan before first install, diff before every update Pay attention to new files — attackers add payloads in new scripts If a "bug fix" update adds network access, that's suspicious ## Trust - Source: tencent - Verification: Indexed source record - Publisher: Trypto1019 - Version: 1.0.0 ## Source health - Status: healthy - Item download looks usable. - Yavira can redirect you to the upstream package for this item. - Health scope: item - Reason: direct_download_ok - Checked at: 2026-04-29T03:07:18.497Z - Expires at: 2026-05-06T03:07:18.497Z - Recommended action: Download for OpenClaw ## Links - [Detail page](https://openagent3.xyz/skills/arc-skill-differ) - [Send to Agent page](https://openagent3.xyz/skills/arc-skill-differ/agent) - [JSON manifest](https://openagent3.xyz/skills/arc-skill-differ/agent.json) - [Markdown brief](https://openagent3.xyz/skills/arc-skill-differ/agent.md) - [Download page](https://openagent3.xyz/downloads/arc-skill-differ)