[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M73F70VPJYFK49WSCEZC0Q52":3,"skill-same:01M73F70VPJYFK49WSCEZC0Q52":47},{"skillNo":4,"name":5,"nameZh":6,"description":6,"descriptionZh":6,"repositoryFullName":7,"ownerLogin":8,"ownerAvatarUrl":9,"ownerAccountNo":10,"ownerDisplayName":11,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":15,"categories":16,"keywords":17,"publishedAt":18,"linkOnly":19,"markdownContent":20,"markdownBody":21,"frontMatter":22,"refName":23,"commitSha":24,"skillDirectory":25,"forksCount":26,"repositoryHtmlUrl":27,"repositoryHomepageUrl":28,"ownerHtmlUrl":29,"ownerBlogUrl":30,"ownerDescription":31,"updatedAt":32,"install":33,"resources":46},"01M73F70VPJYFK49WSCEZC0Q52","process-existence-check",null,"Horonomos-laps\u002FYana-AI","Horonomos-laps","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F355299122?v=4","01M76B3QPXE88ET2SQPDPVATZT"," Horonomos-laps","01M72ZQRJPCYPSSWT4D00VJR2A",13,"Apache-2.0","https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI\u002Fblob\u002Fmain\u002Fcore\u002Fskills\u002Fprocess-existence-check\u002FSKILL.md",[],[],"2026-11-11 15:11:14",false,"---\nname: process-existence-check\ndescription: Nanosecond-speed process existence check by PID. sindresorhus\u002Fprocess-exists patterns, cross-platform PID validation, zombie detection, and watchdog loop for monitoring long-running agent sandboxes. Sources: sindresorhus\u002Fprocess-exists.\norigin: yana-ai — synthesized from sindresorhus\u002Fprocess-exists (MIT)\nlicense: Apache-2.0\nversion: 1.0.0\ncompatibility: yana-ai >= 1.3.48\n---\n\n# \u002Fprocess-existence-check\n\n## When to Use\n\n- Watchdog: poll whether a sandbox subprocess is still alive\n- Validate PID before sending signals (SIGTERM\u002FSIGKILL)\n- Race-condition-safe check: is PID still running before cleanup?\n- Detecting zombie processes (exists = true but state = Z)\n\n## Do NOT use for\n\n- Reliable process tracking over time (use [[process-list-monitoring]])\n- Cross-PID-namespace checks (must be in same namespace)\n\n---\n\n## Basic check\n\n```javascript\nimport processExists from 'process-exists'\n\n\u002F\u002F Single PID\nconst alive = await processExists(1234)\n\n\u002F\u002F Multiple PIDs\nconst results = await processExists.all([1234, 5678, 9012])\n\u002F\u002F → Map { 1234 => true, 5678 => false, 9012 => true }\n```\n\n---\n\n## Watchdog for sandbox process\n\n```javascript\nasync function watchdogLoop(pid: number, intervalMs = 1000, timeoutMs = 30_000): Promise\u003Cvoid> {\n  const deadline = Date.now() + timeoutMs\n\n  while (Date.now() \u003C deadline) {\n    const alive = await processExists(pid)\n    if (!alive) {\n      console.log(`[watchdog] process ${pid} exited`)\n      return\n    }\n    await new Promise(r => setTimeout(r, intervalMs))\n  }\n\n  \u002F\u002F Timeout: kill sandbox\n  console.warn(`[watchdog] timeout — killing sandbox PID ${pid}`)\n  process.kill(pid, 'SIGKILL')\n}\n```\n\n---\n\n## Safe signal send (check before kill)\n\n```bash\n# Bash: check PID exists before sending signal\nsafe_kill() {\n  local pid=\"$1\"\n  local sig=\"${2:-SIGTERM}\"\n  if kill -0 \"$pid\" 2>\u002Fdev\u002Fnull; then\n    kill -s \"$sig\" \"$pid\"\n    echo \"[kill] sent $sig to PID $pid\"\n  else\n    echo \"[kill] PID $pid not found — skipping\"\n  fi\n}\n```\n\n---\n\n## Detect zombie (exists but defunct)\n\n```bash\nis_zombie() {\n  local pid=\"$1\"\n  local state\n  state=$(awk '\u002FState:\u002F{print $2}' \"\u002Fproc\u002F$pid\u002Fstatus\" 2>\u002Fdev\u002Fnull)\n  [[ \"$state\" == \"Z\" ]]\n}\n\nif processExists $PID && is_zombie $PID; then\n  echo \"[watch] PID $PID is a zombie — waiting for parent to reap\"\nfi\n```\n\n---\n\n## Anti-Fake-Pass Checklist\n\n```\n❌ kill -0 on Linux doesn't check zombie state — process \"exists\" as zombie\n❌ PID reuse: after check, PID may be reused by new process — not atomic\n❌ processExists inside container may not see host PIDs (different PID namespace)\n❌ EPERM on kill -0 → process exists but you don't have permission (still exists)\n❌ Polling interval too short → CPU overhead from frequent \u002Fproc reads\n```\n","# \u002Fprocess-existence-check\n\n## When to Use\n\n- Watchdog: poll whether a sandbox subprocess is still alive\n- Validate PID before sending signals (SIGTERM\u002FSIGKILL)\n- Race-condition-safe check: is PID still running before cleanup?\n- Detecting zombie processes (exists = true but state = Z)\n\n## Do NOT use for\n\n- Reliable process tracking over time (use [[process-list-monitoring]])\n- Cross-PID-namespace checks (must be in same namespace)\n\n---\n\n## Basic check\n\n```javascript\nimport processExists from 'process-exists'\n\n\u002F\u002F Single PID\nconst alive = await processExists(1234)\n\n\u002F\u002F Multiple PIDs\nconst results = await processExists.all([1234, 5678, 9012])\n\u002F\u002F → Map { 1234 => true, 5678 => false, 9012 => true }\n```\n\n---\n\n## Watchdog for sandbox process\n\n```javascript\nasync function watchdogLoop(pid: number, intervalMs = 1000, timeoutMs = 30_000): Promise\u003Cvoid> {\n  const deadline = Date.now() + timeoutMs\n\n  while (Date.now() \u003C deadline) {\n    const alive = await processExists(pid)\n    if (!alive) {\n      console.log(`[watchdog] process ${pid} exited`)\n      return\n    }\n    await new Promise(r => setTimeout(r, intervalMs))\n  }\n\n  \u002F\u002F Timeout: kill sandbox\n  console.warn(`[watchdog] timeout — killing sandbox PID ${pid}`)\n  process.kill(pid, 'SIGKILL')\n}\n```\n\n---\n\n## Safe signal send (check before kill)\n\n```bash\n# Bash: check PID exists before sending signal\nsafe_kill() {\n  local pid=\"$1\"\n  local sig=\"${2:-SIGTERM}\"\n  if kill -0 \"$pid\" 2>\u002Fdev\u002Fnull; then\n    kill -s \"$sig\" \"$pid\"\n    echo \"[kill] sent $sig to PID $pid\"\n  else\n    echo \"[kill] PID $pid not found — skipping\"\n  fi\n}\n```\n\n---\n\n## Detect zombie (exists but defunct)\n\n```bash\nis_zombie() {\n  local pid=\"$1\"\n  local state\n  state=$(awk '\u002FState:\u002F{print $2}' \"\u002Fproc\u002F$pid\u002Fstatus\" 2>\u002Fdev\u002Fnull)\n  [[ \"$state\" == \"Z\" ]]\n}\n\nif processExists $PID && is_zombie $PID; then\n  echo \"[watch] PID $PID is a zombie — waiting for parent to reap\"\nfi\n```\n\n---\n\n## Anti-Fake-Pass Checklist\n\n```\n❌ kill -0 on Linux doesn't check zombie state — process \"exists\" as zombie\n❌ PID reuse: after check, PID may be reused by new process — not atomic\n❌ processExists inside container may not see host PIDs (different PID namespace)\n❌ EPERM on kill -0 → process exists but you don't have permission (still exists)\n❌ Polling interval too short → CPU overhead from frequent \u002Fproc reads\n```\n",{},"main","481dcd7dd2e288b9d627a2bd017db70e64e6c6fa","core\u002Fskills\u002Fprocess-existence-check",2,"https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI","https:\u002F\u002Fyana.vutam.link\u002F","https:\u002F\u002Fgithub.com\u002FHoronomos-laps","https:\u002F\u002Fyana.vutam.link","An open-source governed runtime & execution environment for multi-agent AI systems.","2026-11-12 23:12:27",{"source":7,"skillName":5,"commands":34,"prompt":44,"zipAvailable":45},[35,38,41],{"tool":36,"command":37},"npx","npx skills add Horonomos-laps\u002FYana-AI --skill process-existence-check",{"tool":39,"command":40},"bunx","bunx skills add Horonomos-laps\u002FYana-AI --skill process-existence-check",{"tool":42,"command":43},"pnpm","pnpm dlx skills add Horonomos-laps\u002FYana-AI --skill process-existence-check","安装技能，技能地址：https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI\u002Fblob\u002Fmain\u002Fcore\u002Fskills\u002Fprocess-existence-check\u002FSKILL.md",true,[],[48,56,63,71,79,87],{"skillNo":49,"name":50,"nameZh":6,"description":51,"descriptionZh":6,"repositoryFullName":7,"ownerLogin":8,"ownerAvatarUrl":9,"ownerAccountNo":10,"ownerDisplayName":11,"repositoryNo":12,"starsCount":13,"licenseSpdxId":52,"licenseFileUrl":6,"sourceHtmlUrl":53,"categories":54,"keywords":55,"publishedAt":18},"01M735GKET5YVYKAY62W2P5YXB","openai--sentry--sentry","Use when the user asks to inspect Sentry issues or events, summarize recent production errors, or pull basic Sentry health data via the Sentry API; 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Use for read-only basket comparison and gap analysis without investment advice or live trading.","https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI\u002Fblob\u002Fmain\u002Fcore\u002Fskills\u002Fito-basket-compare\u002FSKILL.md",[],[],{"skillNo":64,"name":65,"nameZh":6,"description":66,"descriptionZh":6,"repositoryFullName":7,"ownerLogin":8,"ownerAvatarUrl":9,"ownerAccountNo":10,"ownerDisplayName":11,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":67,"sourceHtmlUrl":68,"categories":69,"keywords":70,"publishedAt":18},"01M734CYEMZFDR3KH6SW0JP8TD","implementing-network-traffic-baselining","Build network traffic baselines from NetFlow\u002FIPFIX data using Python pandas for statistical analysis, z-score anomaly detection, and hourly\u002Fdaily traffic pattern profiling","https:\u002F\u002Fgithub.com\u002Fyanacuti1121\u002FYana-AI\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fimplementing-network-traffic-baselining\u002FLICENSE","https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fimplementing-network-traffic-baselining\u002FSKILL.md",[],[],{"skillNo":72,"name":73,"nameZh":6,"description":74,"descriptionZh":6,"repositoryFullName":7,"ownerLogin":8,"ownerAvatarUrl":9,"ownerAccountNo":10,"ownerDisplayName":11,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":75,"sourceHtmlUrl":76,"categories":77,"keywords":78,"publishedAt":18},"01M73ASZ6NJRJM44Z2P84NGQ3Q","detecting-evasion-techniques-in-endpoint-logs","Detects defense evasion techniques used by adversaries in endpoint logs including log tampering, timestomping, process injection, and security tool disabling. Use when investigating suspicious endpoint behavior, building detection rules for evasion tactics, or conducting threat hunting for stealthy adversary activity. Activates for requests involving evasion detection, defense evasion analysis, log tampering detection, or MITRE ATT&CK TA0005.","https:\u002F\u002Fgithub.com\u002Fyanacuti1121\u002FYana-AI\u002Fblob\u002Fmain\u002Fcore\u002Fskills\u002Fdetecting-evasion-techniques-in-endpoint-logs\u002FLICENSE","https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI\u002Fblob\u002Fmain\u002Fcore\u002Fskills\u002Fdetecting-evasion-techniques-in-endpoint-logs\u002FSKILL.md",[],[],{"skillNo":80,"name":81,"nameZh":6,"description":82,"descriptionZh":6,"repositoryFullName":7,"ownerLogin":8,"ownerAvatarUrl":9,"ownerAccountNo":10,"ownerDisplayName":11,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":83,"sourceHtmlUrl":84,"categories":85,"keywords":86,"publishedAt":18},"01M734AFNXD06Z78QRK0VKGT7Q","implementing-microsegmentation-with-guardicore","Implementing microsegmentation using Akamai Guardicore Segmentation to map application dependencies, create granular network policies, visualize east-west traffic flows, and enforce least-privilege communication between workloads across data centers and cloud.","https:\u002F\u002Fgithub.com\u002Fyanacuti1121\u002FYana-AI\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fimplementing-microsegmentation-with-guardicore\u002FLICENSE","https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fimplementing-microsegmentation-with-guardicore\u002FSKILL.md",[],[],{"skillNo":88,"name":89,"nameZh":6,"description":6,"descriptionZh":6,"repositoryFullName":7,"ownerLogin":8,"ownerAvatarUrl":9,"ownerAccountNo":10,"ownerDisplayName":11,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":90,"categories":91,"keywords":92,"publishedAt":18},"01M736TK27QMCXK0DVCH25SJN5","ramdisk-tmpfs-patterns","https:\u002F\u002Fgithub.com\u002FHoronomos-laps\u002FYana-AI\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Framdisk-tmpfs-patterns\u002FSKILL.md",[],[]]