{"id":"7d963782-5443-4a31-8b9c-282d98282e68","entityType":"agent","slug":"clawhub-bytesagain-lab-certcheck","name":"Certcheck","canonicalUrl":"https://www.xpersona.co/agent/clawhub-bytesagain-lab-certcheck","canonicalPath":"/agent/clawhub-bytesagain-lab-certcheck","generatedAt":"2026-10-11T08:39:49.729Z","source":"CLAWHUB","claimStatus":"UNCLAIMED","verificationTier":"NONE","summary":{"evidence":{"source":"editorial-content","verified":true,"confidence":"high","updatedAt":"2026-10-11T06:14:13.376Z","emptyReason":null},"description":"Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. Skill: Certcheck Owner: bytesagain-lab Summary: Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. 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Quick lookup for Certcheck concepts, best practices, and implementation patterns.\n\nTags: latest:4.0.2\n\nVersion history:\n\nv4.0.2 | 2026-03-24T01:12:27.899Z | user\n\nFix description\n\nv4.0.1 | 2026-03-24T00:32:23.889Z | user\n\nFix description\n\nv4.0.0 | 2026-03-23T01:06:10.928Z | user\n\nClean package\n\nv3.0.0 | 2026-03-19T12:08:37.848Z | user\n\nv3.0.0: Complete rewrite with real functionality.\n\nv2.0.1 | 2026-03-18T10:37:17.012Z | user\n\nupdate\n\nv2.0.0 | 2026-03-17T19:12:34.407Z | user\n\nv2.5 standard: Use-when desc, homepage, source, security fix\n\nv1.0.6 | 2026-03-16T15:24:30.772Z | user\n\nQuality improvements\n\nv1.0.5 | 2026-03-16T11:41:53.137Z | user\n\nold template -> domain-specific v2.0.0\n\nv1.0.4 | 2026-03-15T22:09:47.601Z | user\n\nQuality upgrade\n\nv1.0.3 | 2026-03-15T21:37:33.606Z | user\n\nQuality upgrade: custom functionality\n\nv1.0.2 | 2026-03-15T11:48:40.318Z | user\n\nDe-template, unique content, script cleanup\n\nv1.0.1 | 2026-03-15T10:55:06.675Z | user\n\nQuality fix: cleaner docs, removed flags\n\nv1.0.0 | 2026-03-15T01:55:04.561Z | user\n\nInitial release\n\nArchive index:\n\nArchive v4.0.2: 4 files, 5057 bytes\n\nFiles: scripts/script.sh (6883b), skill-card.md (2142b), SKILL.md (1171b), _meta.json (128b)\n\nFile v4.0.2:SKILL.md\n\n---\nname: \"certcheck\"\nversion: \"4.0.1\"\ndescription: \"Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns.\"\nauthor: \"BytesAgain\"\nhomepage: \"https://bytesagain.com\"\nsource: \"https://github.com/bytesagain/ai-skills\"\ntags: [certcheck, reference]\ncategory: \"devtools\"\n---\n\n# Certcheck\n\nReference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. No API keys or credentials required.\n\n## Commands\n\n| Command | Description |\n|---------|-------------|\n| `intro` | intro reference |\n| `quickstart` | quickstart reference |\n| `patterns` | patterns reference |\n| `debugging` | debugging reference |\n| `performance` | performance reference |\n| `security` | security reference |\n| `migration` | migration reference |\n| `cheatsheet` | cheatsheet reference |\n\n## Output Format\n\nAll commands output plain-text reference documentation via heredoc. No external API calls, no credentials needed, no network access.\n\n---\n\n*Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*\n\nFile v4.0.2:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"4.0.2\",\n  \"publishedAt\": 1774314747899\n}\n\nFile v4.0.2:skill-card.md\n\n## Description:\n\nReference tool for devtools that provides quick lookup material for Certcheck concepts, best practices, and implementation patterns.\n\nThis skill is ready for commercial/non-commercial use.\n\n## Publisher:\n\n[bytesagain-lab](https://clawhub.ai/user/bytesagain-lab)\n\n### License/Terms of Use:\n\nMIT-0\n\n## Use Case:\n\nDevelopers and security practitioners use Certcheck as an offline quick-reference helper for Certcheck concepts, setup, patterns, debugging, performance, security, migration, and cheat-sheet guidance.\n\n### Deployment Geography for Use:\n\nGlobal\n\n## Known Risks and Mitigations:\n\nRisk: Certcheck content is generic reference guidance rather than authoritative product documentation.\n\nMitigation: Verify operational decisions against authoritative Certcheck or organizational documentation before applying changes.\n\nRisk: Release metadata, skill frontmatter, and script version values do not match.\n\nMitigation: Confirm the intended release version before deployment and use the server release version as the package identifier.\n\nRisk: Static security guidance mentions credentials as a documentation topic.\n\nMitigation: Do not place real credentials in the skill files or command inputs; treat credential references as instructional text only.\n\n## Reference(s):\n\n- [Certcheck on ClawHub](https://clawhub.ai/bytesagain-lab/skills/certcheck)\n- [BytesAgain homepage](https://bytesagain.com)\n\n## Skill Output:\n\n**Output Type(s):** [text, markdown, shell commands, guidance]\n\n**Output Format:** [Plain text and Markdown reference documentation emitted by shell commands]\n\n**Output Parameters:** [1D]\n\n**Other Properties Related to Output:** [Offline static reference output; no API keys, credentials, or network access are required.]\n\n## Skill Version(s):\n\n4.0.2 (source: server release metadata; artifact frontmatter lists 4.0.1 and script lists 4.0.0)\n\n## Ethical Considerations:\n\nUsers should evaluate whether this skill is appropriate for their environment, review any generated or modified files before relying on them, and apply their organization's safety, security, and compliance requirements before deployment.\n\nArchive v4.0.1: 3 files, 3920 bytes\n\nFiles: scripts/script.sh (6883b), SKILL.md (1171b), _meta.json (128b)\n\nFile v4.0.1:SKILL.md\n\n---\nname: \"certcheck\"\nversion: \"4.0.1\"\ndescription: \"Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns.\"\nauthor: \"BytesAgain\"\nhomepage: \"https://bytesagain.com\"\nsource: \"https://github.com/bytesagain/ai-skills\"\ntags: [certcheck, reference]\ncategory: \"devtools\"\n---\n\n# Certcheck\n\nReference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. No API keys or credentials required.\n\n## Commands\n\n| Command | Description |\n|---------|-------------|\n| `intro` | intro reference |\n| `quickstart` | quickstart reference |\n| `patterns` | patterns reference |\n| `debugging` | debugging reference |\n| `performance` | performance reference |\n| `security` | security reference |\n| `migration` | migration reference |\n| `cheatsheet` | cheatsheet reference |\n\n## Output Format\n\nAll commands output plain-text reference documentation via heredoc. No external API calls, no credentials needed, no network access.\n\n---\n\n*Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*\n\nFile v4.0.1:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"4.0.1\",\n  \"publishedAt\": 1774312343889\n}\n\nArchive v4.0.0: 3 files, 3864 bytes\n\nFiles: scripts/script.sh (6883b), SKILL.md (939b), _meta.json (128b)\n\nFile v4.0.0:SKILL.md\n\n---\nname: \"certcheck\"\nversion: \"4.0.0\"\ndescription: \"Powered by BytesAgain\"\nauthor: \"BytesAgain\"\nhomepage: \"https://bytesagain.com\"\nsource: \"https://github.com/bytesagain/ai-skills\"\ntags: [certcheck, reference]\ncategory: \"devtools\"\n---\n\n# Certcheck\n\nPowered by BytesAgain. No API keys or credentials required — outputs reference documentation only.\n\n## Commands\n\n| Command | Description |\n|---------|-------------|\n| `intro` | intro reference |\n| `quickstart` | quickstart reference |\n| `patterns` | patterns reference |\n| `debugging` | debugging reference |\n| `performance` | performance reference |\n| `security` | security reference |\n| `migration` | migration reference |\n| `cheatsheet` | cheatsheet reference |\n\n## Output Format\n\nAll commands output plain-text reference documentation via heredoc. No external API calls, no credentials needed, no network access.\n\n---\n\n*Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*\n\nFile v4.0.0:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"4.0.0\",\n  \"publishedAt\": 1774227970928\n}\n\nArchive v3.0.0: 3 files, 1618 bytes\n\nFiles: scripts/script.sh (2538b), SKILL.md (836b), _meta.json (128b)\n\nFile v3.0.0:SKILL.md\n\n---\nname: \"certcheck\"\nversion: \"3.0.0\"\ndescription: \"Check SSL certificates on remote domains for expiry and chain validity. Use when auditing SSL health.\"\nauthor: \"BytesAgain\"\nhomepage: \"https://bytesagain.com\"\n---\n\n# certcheck\n\nCheck SSL certificates on remote domains for expiry and chain validity. Use when auditing SSL health.\n\n## Commands\n\n### `check`\n\n```bash\nscripts/script.sh check <domain>\n```\n\n### `expiry`\n\n```bash\nscripts/script.sh expiry <domain>\n```\n\n### `chain`\n\n```bash\nscripts/script.sh chain <domain>\n```\n\n### `compare`\n\n```bash\nscripts/script.sh compare <d1 d2>\n```\n\n### `batch`\n\n```bash\nscripts/script.sh batch <file>\n```\n\n### `report`\n\n```bash\nscripts/script.sh report <domain>\n```\n\n## Data Storage\n\nData stored in `~/.local/share/certcheck/`.\n\n---\n\n*Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*\n\nFile v3.0.0:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"3.0.0\",\n  \"publishedAt\": 1773922117848\n}\n\nArchive v2.0.1: 3 files, 4530 bytes\n\nFiles: scripts/script.sh (11704b), SKILL.md (4554b), _meta.json (128b)\n\nFile v2.0.1:SKILL.md\n\n---\nname: CertCheck\ndescription: \"Check SSL certificate expiry dates and catch renewals before breakage. Use when auditing domain certs, monitoring expiry, or verifying chain trust.\"\nversion: \"2.0.0\"\nauthor: \"BytesAgain\"\nhomepage: https://bytesagain.com\nsource: https://github.com/bytesagain/ai-skills\ntags: [\"ssl\",\"tls\",\"certificate\",\"security\",\"https\",\"expiry\",\"domain\",\"devops\"]\ncategories: [\"Security\", \"System Tools\", \"Developer Tools\"]\n---\n\n# CertCheck\n\nA comprehensive security toolkit for managing certificates, credentials, and security policies. Track generation, rotation, auditing, and revocation of certificates and secrets — all from the command line.\n\n## Commands\n\n| Command | Description |\n|---------|-------------|\n| `certcheck generate <input>` | Generate a new certificate or credential entry |\n| `certcheck check-strength <input>` | Check the strength of a certificate or credential |\n| `certcheck rotate <input>` | Record a credential rotation event |\n| `certcheck audit <input>` | Log an audit entry for compliance tracking |\n| `certcheck store <input>` | Store a certificate or secret reference |\n| `certcheck retrieve <input>` | Retrieve a previously stored entry |\n| `certcheck expire <input>` | Record or check expiration details |\n| `certcheck policy <input>` | Define or review security policies |\n| `certcheck report <input>` | Generate a security report entry |\n| `certcheck hash <input>` | Record a hash value for verification |\n| `certcheck verify <input>` | Verify a certificate or credential |\n| `certcheck revoke <input>` | Revoke a certificate or credential |\n| `certcheck stats` | Show summary statistics across all logs |\n| `certcheck export <fmt>` | Export data in json, csv, or txt format |\n| `certcheck search <term>` | Search across all log files |\n| `certcheck recent` | Show the 20 most recent activity entries |\n| `certcheck status` | Health check — version, data size, last activity |\n| `certcheck help` | Show available commands |\n| `certcheck version` | Show version |\n\nAll data commands (generate, check-strength, rotate, audit, store, retrieve, expire, policy, report, hash, verify, revoke) work the same way:\n- **With arguments:** Saves a timestamped entry to its dedicated log file and records it in the history log.\n- **Without arguments:** Shows the 20 most recent entries from that command's log.\n\n## Data Storage\n\n- **Location:** `~/.local/share/certcheck/`\n- Each command writes to its own log file (e.g., `generate.log`, `audit.log`, `revoke.log`)\n- A unified `history.log` tracks all activity across commands\n- Export supports JSON, CSV, and plain text formats\n- All data is stored locally — no external APIs or network calls\n\n## Requirements\n\n- bash 4+ (uses `set -euo pipefail`)\n- Standard Unix utilities (`date`, `wc`, `du`, `grep`, `head`, `tail`)\n- No external dependencies or API keys required\n\n## When to Use\n\n1. **Certificate lifecycle tracking** — Record generation, rotation, expiration, and revocation events for SSL/TLS certificates across your infrastructure.\n2. **Security audit logging** — Maintain a timestamped audit trail of credential changes for compliance and internal reviews.\n3. **Credential strength assessment** — Log and track password/key strength evaluations over time to identify weak spots.\n4. **Policy enforcement documentation** — Define and review security policies, then verify adherence through the report and audit commands.\n5. **Team security reporting** — Export consolidated security activity data in JSON/CSV/TXT for sharing with stakeholders or feeding into dashboards.\n\n## Examples\n\n```bash\n# Generate and track a new certificate\ncertcheck generate \"wildcard cert for *.example.com SHA-256\"\n\n# Check credential strength\ncertcheck check-strength \"api-key-prod-2024 128-bit\"\n\n# Record a rotation event\ncertcheck rotate \"db-password rotated for production cluster\"\n\n# Log an audit finding\ncertcheck audit \"quarterly review: 3 certs expiring within 30 days\"\n\n# Store a certificate reference\ncertcheck store \"letsencrypt cert serial:ABC123 for api.example.com\"\n\n# Mark a certificate for expiration tracking\ncertcheck expire \"wildcard cert expires 2024-12-15\"\n\n# Revoke a compromised credential\ncertcheck revoke \"api-key-staging-old compromised via leaked .env\"\n\n# View statistics across all activity\ncertcheck stats\n\n# Export everything to JSON\ncertcheck export json\n\n# Search for a specific domain\ncertcheck search example.com\n\n# Check system health\ncertcheck status\n```\n\n---\n\n*Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*\n\nFile v2.0.1:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"2.0.1\",\n  \"publishedAt\": 1773830237012\n}\n\nArchive v2.0.0: 3 files, 3305 bytes\n\nFiles: scripts/script.sh (11704b), SKILL.md (1298b), _meta.json (128b)\n\nFile v2.0.0:SKILL.md\n\n---\nname: CertCheck\ndescription: \"SSL/TLS certificate checker and analyzer. Use when you need certcheck.\"\nversion: \"2.0.0\"\nauthor: \"BytesAgain\"\nhomepage: https://bytesagain.com\nsource: https://github.com/bytesagain/ai-skills\ntags: [\"ssl\",\"tls\",\"certificate\",\"security\",\"https\",\"expiry\",\"domain\",\"devops\"]\ncategories: [\"Security\", \"System Tools\", \"Developer Tools\"]\n---\n# CertCheck\nCheck SSL certificates. Catch expiring certs before they break your site.\n## Commands\n- `check <domain>` — Full certificate inspection\n- `expiry <domain>` — Days until expiration\n- `chain <domain>` — Show certificate chain\n- `batch <file>` — Check multiple domains from file\n## Usage Examples\n```bash\ncertcheck check google.com\ncertcheck expiry github.com\ncertcheck chain example.com\n```\n---\nPowered by BytesAgain | bytesagain.com\n\n- Run `certcheck help` for all commands\n\n## When to Use\n\n- to automate certcheck tasks in your workflow\n- for batch processing certcheck operations\n\n## Output\n\nReturns results to stdout. Redirect to a file with `certcheck run > output.txt`.\n\n## Configuration\n\nSet `CERTCHECK_DIR` environment variable to change the data directory. Default: `~/.local/share/certcheck/`\n\n---\n*Powered by BytesAgain | bytesagain.com*\n*Feedback & Feature Requests: https://bytesagain.com/feedback*\n\nFile v2.0.0:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"2.0.0\",\n  \"publishedAt\": 1773774754407\n}\n\nArchive v1.0.6: 3 files, 3329 bytes\n\nFiles: scripts/script.sh (11704b), SKILL.md (1386b), _meta.json (128b)\n\nFile v1.0.6:SKILL.md\n\n---\nname: CertCheck\ndescription: \"SSL/TLS certificate checker and analyzer. Inspect SSL certificates for any domain, check expiration dates, verify certificate chain, detect security issues, and monitor certificate validity. Get alerted before your SSL certificates expire.\"\nversion: \"2.0.0\"\nauthor: \"BytesAgain\"\ntags: [\"ssl\",\"tls\",\"certificate\",\"security\",\"https\",\"expiry\",\"domain\",\"devops\"]\ncategories: [\"Security\", \"System Tools\", \"Developer Tools\"]\n---\n# CertCheck\nCheck SSL certificates. Catch expiring certs before they break your site.\n## Commands\n- `check <domain>` — Full certificate inspection\n- `expiry <domain>` — Days until expiration\n- `chain <domain>` — Show certificate chain\n- `batch <file>` — Check multiple domains from file\n## Usage Examples\n```bash\ncertcheck check google.com\ncertcheck expiry github.com\ncertcheck chain example.com\n```\n---\nPowered by BytesAgain | bytesagain.com\n\n- Run `certcheck help` for all commands\n\n## When to Use\n\n- to automate certcheck tasks in your workflow\n- for batch processing certcheck operations\n\n## Output\n\nReturns results to stdout. Redirect to a file with `certcheck run > output.txt`.\n\n## Configuration\n\nSet `CERTCHECK_DIR` environment variable to change the data directory. Default: `~/.local/share/certcheck/`\n\n---\n*Powered by BytesAgain | bytesagain.com*\n*Feedback & Feature Requests: https://bytesagain.com/feedback*\n\nFile v1.0.6:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"1.0.6\",\n  \"publishedAt\": 1773674670772\n}\n\nArchive v1.0.5: 3 files, 3330 bytes\n\nFiles: scripts/script.sh (11704b), SKILL.md (1386b), _meta.json (128b)\n\nFile v1.0.5:SKILL.md\n\n---\nname: CertCheck\ndescription: \"SSL/TLS certificate checker and analyzer. Inspect SSL certificates for any domain, check expiration dates, verify certificate chain, detect security issues, and monitor certificate validity. Get alerted before your SSL certificates expire.\"\nversion: \"2.0.0\"\nauthor: \"BytesAgain\"\ntags: [\"ssl\",\"tls\",\"certificate\",\"security\",\"https\",\"expiry\",\"domain\",\"devops\"]\ncategories: [\"Security\", \"System Tools\", \"Developer Tools\"]\n---\n# CertCheck\nCheck SSL certificates. Catch expiring certs before they break your site.\n## Commands\n- `check <domain>` — Full certificate inspection\n- `expiry <domain>` — Days until expiration\n- `chain <domain>` — Show certificate chain\n- `batch <file>` — Check multiple domains from file\n## Usage Examples\n```bash\ncertcheck check google.com\ncertcheck expiry github.com\ncertcheck chain example.com\n```\n---\nPowered by BytesAgain | bytesagain.com\n\n- Run `certcheck help` for all commands\n\n## When to Use\n\n- to automate certcheck tasks in your workflow\n- for batch processing certcheck operations\n\n## Output\n\nReturns results to stdout. Redirect to a file with `certcheck run > output.txt`.\n\n## Configuration\n\nSet `CERTCHECK_DIR` environment variable to change the data directory. Default: `~/.local/share/certcheck/`\n\n---\n*Powered by BytesAgain | bytesagain.com*\n*Feedback & Feature Requests: https://bytesagain.com/feedback*\n\nFile v1.0.5:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"1.0.5\",\n  \"publishedAt\": 1773661313137\n}\n\nArchive v1.0.4: 3 files, 3357 bytes\n\nFiles: scripts/script.sh (6856b), SKILL.md (1386b), _meta.json (128b)\n\nFile v1.0.4:SKILL.md\n\n---\nname: CertCheck\ndescription: \"SSL/TLS certificate checker and analyzer. Inspect SSL certificates for any domain, check expiration dates, verify certificate chain, detect security issues, and monitor certificate validity. Get alerted before your SSL certificates expire.\"\nversion: \"1.0.0\"\nauthor: \"BytesAgain\"\ntags: [\"ssl\",\"tls\",\"certificate\",\"security\",\"https\",\"expiry\",\"domain\",\"devops\"]\ncategories: [\"Security\", \"System Tools\", \"Developer Tools\"]\n---\n# CertCheck\nCheck SSL certificates. Catch expiring certs before they break your site.\n## Commands\n- `check <domain>` — Full certificate inspection\n- `expiry <domain>` — Days until expiration\n- `chain <domain>` — Show certificate chain\n- `batch <file>` — Check multiple domains from file\n## Usage Examples\n```bash\ncertcheck check google.com\ncertcheck expiry github.com\ncertcheck chain example.com\n```\n---\nPowered by BytesAgain | bytesagain.com\n\n- Run `certcheck help` for all commands\n\n## When to Use\n\n- to automate certcheck tasks in your workflow\n- for batch processing certcheck operations\n\n## Output\n\nReturns results to stdout. Redirect to a file with `certcheck run > output.txt`.\n\n## Configuration\n\nSet `CERTCHECK_DIR` environment variable to change the data directory. Default: `~/.local/share/certcheck/`\n\n---\n*Powered by BytesAgain | bytesagain.com*\n*Feedback & Feature Requests: https://bytesagain.com/feedback*\n\nFile v1.0.4:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"1.0.4\",\n  \"publishedAt\": 1773612587601\n}\n\nArchive v1.0.3: 3 files, 3357 bytes\n\nFiles: scripts/script.sh (6856b), SKILL.md (1386b), _meta.json (128b)\n\nFile v1.0.3:SKILL.md\n\n---\nname: CertCheck\ndescription: \"SSL/TLS certificate checker and analyzer. Inspect SSL certificates for any domain, check expiration dates, verify certificate chain, detect security issues, and monitor certificate validity. Get alerted before your SSL certificates expire.\"\nversion: \"1.0.0\"\nauthor: \"BytesAgain\"\ntags: [\"ssl\",\"tls\",\"certificate\",\"security\",\"https\",\"expiry\",\"domain\",\"devops\"]\ncategories: [\"Security\", \"System Tools\", \"Developer Tools\"]\n---\n# CertCheck\nCheck SSL certificates. Catch expiring certs before they break your site.\n## Commands\n- `check <domain>` — Full certificate inspection\n- `expiry <domain>` — Days until expiration\n- `chain <domain>` — Show certificate chain\n- `batch <file>` — Check multiple domains from file\n## Usage Examples\n```bash\ncertcheck check google.com\ncertcheck expiry github.com\ncertcheck chain example.com\n```\n---\nPowered by BytesAgain | bytesagain.com\n\n- Run `certcheck help` for all commands\n\n## When to Use\n\n- to automate certcheck tasks in your workflow\n- for batch processing certcheck operations\n\n## Output\n\nReturns results to stdout. Redirect to a file with `certcheck run > output.txt`.\n\n## Configuration\n\nSet `CERTCHECK_DIR` environment variable to change the data directory. Default: `~/.local/share/certcheck/`\n\n---\n*Powered by BytesAgain | bytesagain.com*\n*Feedback & Feature Requests: https://bytesagain.com/feedback*\n\nFile v1.0.3:_meta.json\n\n{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"1.0.3\",\n  \"publishedAt\": 1773610653606\n}","readmeExcerpt":"Skill: Certcheck Owner: bytesagain-lab Summary: Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. Tags: latest:4.0.2 Version history: v4.0.2 | 2026-03-24T01:12:27.899Z | user Fix description v4.0.1 | 2026-03-24T00:32:23.889Z | user Fix description v4.0.0 | 2026-03-23T01:06:10.928Z | user Clean package v3.0.0 | 2","codeSnippets":[],"executableExamples":[{"language":"bash","snippet":"scripts/script.sh check <domain>"},{"language":"bash","snippet":"scripts/script.sh expiry <domain>"},{"language":"bash","snippet":"scripts/script.sh chain <domain>"},{"language":"bash","snippet":"scripts/script.sh compare <d1 d2>"},{"language":"bash","snippet":"scripts/script.sh batch <file>"},{"language":"bash","snippet":"scripts/script.sh report <domain>"}],"parameters":null,"dependencies":[],"permissions":[],"extractedFiles":[{"path":"SKILL.md","content":"---\nname: \"certcheck\"\nversion: \"4.0.1\"\ndescription: \"Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns.\"\nauthor: \"BytesAgain\"\nhomepage: \"https://bytesagain.com\"\nsource: \"https://github.com/bytesagain/ai-skills\"\ntags: [certcheck, reference]\ncategory: \"devtools\"\n---\n\n# Certcheck\n\nReference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. No API keys or credentials required.\n\n## Commands\n\n| Command | Description |\n|---------|-------------|\n| `intro` | intro reference |\n| `quickstart` | quickstart reference |\n| `patterns` | patterns reference |\n| `debugging` | debugging reference |\n| `performance` | performance reference |\n| `security` | security reference |\n| `migration` | migration reference |\n| `cheatsheet` | cheatsheet reference |\n\n## Output Format\n\nAll commands output plain-text reference documentation via heredoc. No external API calls, no credentials needed, no network access.\n\n---\n\n*Powered by BytesAgain | bytesagain.com | hello@bytesagain.com*"},{"path":"_meta.json","content":"{\n  \"ownerId\": \"kn76vqrf94wk924mddj8fp4p5x8497tb\",\n  \"slug\": \"certcheck\",\n  \"version\": \"4.0.2\",\n  \"publishedAt\": 1774314747899\n}"},{"path":"skill-card.md","content":"## Description:\n\nReference tool for devtools that provides quick lookup material for Certcheck concepts, best practices, and implementation patterns.\n\nThis skill is ready for commercial/non-commercial use.\n\n## Publisher:\n\n[bytesagain-lab](https://clawhub.ai/user/bytesagain-lab)\n\n### License/Terms of Use:\n\nMIT-0\n\n## Use Case:\n\nDevelopers and security practitioners use Certcheck as an offline quick-reference helper for Certcheck concepts, setup, patterns, debugging, performance, security, migration, and cheat-sheet guidance.\n\n### Deployment Geography for Use:\n\nGlobal\n\n## Known Risks and Mitigations:\n\nRisk: Certcheck content is generic reference guidance rather than authoritative product documentation.\n\nMitigation: Verify operational decisions against authoritative Certcheck or organizational documentation before applying changes.\n\nRisk: Release metadata, skill frontmatter, and script version values do not match.\n\nMitigation: Confirm the intended release version before deployment and use the server release version as the package identifier.\n\nRisk: Static security guidance mentions credentials as a documentation topic.\n\nMitigation: Do not place real credentials in the skill files or command inputs; treat credential references as instructional text only.\n\n## Reference(s):\n\n- [Certcheck on ClawHub](https://clawhub.ai/bytesagain-lab/skills/certcheck)\n- [BytesAgain homepage](https://bytesagain.com)\n\n## Skill Output:\n\n**Output Type(s):** [text, markdown, shell commands, guidance]\n\n**Output Format:** [Plain text and Markdown reference documentation emitted by shell commands]\n\n**Output Parameters:** [1D]\n\n**Other Properties Related to Output:** [Offline static reference output; no API keys, credentials, or network access are required.]\n\n## Skill Version(s):\n\n4.0.2 (source: server release metadata; artifact frontmatter lists 4.0.1 and script lists 4.0.0)\n\n## Ethical Considerations:\n\nUsers should evaluate whether this skill is appropriate for their environment, review any generated or modified files before relying on them, and apply their organization's safety, security, and compliance requirements before deployment."}],"languages":[],"docsSourceLabel":"CLAWHUB","editorialOverview":"Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. Skill: Certcheck Owner: bytesagain-lab Summary: Reference tool for devtools — covers intro, quickstart, patterns and more. Quick lookup for Certcheck concepts, best practices, and implementation patterns. 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