Agent skill
by jeremylongshore in jeremylongshore/tons-of-skills-marketplace
Audit a target's TLS certificate beyond protocol/expiry — chain ordering, OCSP stapling, revocation status, Certificate Transparency presence, key-usage flags, and over-broad wildcards.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace detecting-ssl-cert-issues --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/detecting-ssl-cert-issues .claude/skills/detecting-ssl-cert-issues && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "detecting-ssl-cert-issues" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/detecting-ssl-cert-issues into .claude/skills/detecting-ssl-cert-issues/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "detecting-ssl-cert-issues", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/detecting-ssl-cert-issuesType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace detecting-ssl-cert-issues --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/.curated/detecting-ssl-cert-issues .agents/skills/detecting-ssl-cert-issues && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "detecting-ssl-cert-issues" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/detecting-ssl-cert-issues into .agents/skills/detecting-ssl-cert-issues/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "detecting-ssl-cert-issues", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace detecting-ssl-cert-issues --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/.curated/detecting-ssl-cert-issues .cursor/skills/detecting-ssl-cert-issues && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "detecting-ssl-cert-issues" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/detecting-ssl-cert-issues into .cursor/skills/detecting-ssl-cert-issues/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "detecting-ssl-cert-issues", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/jeremylongshore/tons-of-skills-marketplace.git --path skills/.curated/detecting-ssl-cert-issues--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace detecting-ssl-cert-issues --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/.curated/detecting-ssl-cert-issues .gemini/skills/detecting-ssl-cert-issues && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "detecting-ssl-cert-issues" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/detecting-ssl-cert-issues into .gemini/skills/detecting-ssl-cert-issues/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "detecting-ssl-cert-issues", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install jeremylongshore/tons-of-skills-marketplace detecting-ssl-cert-issuesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/.curated/detecting-ssl-cert-issues .github/skills/detecting-ssl-cert-issues && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "detecting-ssl-cert-issues" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/detecting-ssl-cert-issues into .github/skills/detecting-ssl-cert-issues/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "detecting-ssl-cert-issues", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install jeremylongshore/tons-of-skills-marketplace detecting-ssl-cert-issues --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/.curated/detecting-ssl-cert-issues .opencode/skills/detecting-ssl-cert-issues && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "detecting-ssl-cert-issues" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/detecting-ssl-cert-issues into .opencode/skills/detecting-ssl-cert-issues/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "detecting-ssl-cert-issues", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
detecting-ssl-cert-issuesAudit a target's TLS certificate beyond protocol/expiry — chain ordering, OCSP stapling, revocation status, Certificate Transparency presence, key-usage flags, and over-broad wildcards.
Detecting Ssl Cert Issues is an agent skill from jeremylongshore/tons-of-skills-marketplace. Audit a target's TLS certificate beyond protocol/expiry — chain ordering, OCSP stapling, revocation status, Certificate Transparency presence, key-usage flags, and over-broad wildcards. Use when: TLS handshake already passes (skill 1 analyzing-tls-config cleared) but you suspect the cert posture is fragile. Auditors flag this during SOC2 readiness when a renewal slipped or an intermediate was rotated. Threshold: missing OCSP stapling on production, fewer than 2 SCTs in the cert, intermediate served out of order…
Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts and reference files (for example `references/PLAYBOOK.md`, `references/THEORY.md` and `scripts/check_cert_chain.py`). Compatibility notes: Designed for Claude Code
It sits in Legal & Compliance, covering Cloud networking, Cryptography and SOC 2 and security compliance. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.
4 steps, taken from the step headings in SKILL.md.
Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.
Pre-approves these tools, so the agent can use them without asking each time:
ReadBash(python3:*)Bash(openssl:*)From allowed-tools in the SKILL.md frontmatter.
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
python3jqFrom the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Designed for Claude Code
From compatibility in the SKILL.md frontmatter.
Detecting Ssl Cert Issues loads about 1.7k tokens when it runs, and up to ~4.5k if it reads all its reference files. Until then it costs about 198 tokens; SKILL.md has 575 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 575 words, ~1,715 tokens.
.claude/skills/detecting-ssl-cert-issues/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.This skill is the second-level cert audit, run after analyzing-tls-config
clears the protocol+cipher+expiry+hostname basics. It surfaces issues
that don't break the handshake today but make the cert fragile or open
to soft-bypass attacks: missing OCSP stapling forces clients to phone
home to the CA (privacy + latency hit), missing Certificate Transparency
SCTs are rejected by Chrome since 2018, an out-of-order chain confuses
older clients, and over-broad wildcards expand the blast radius of any
future key compromise.
| Finding | Severity | Threshold | Affected control |
|---|---|---|---|
| Revoked certificate presented | CRITICAL | OCSP responder says "revoked" | RFC 6960 |
| Missing or invalid OCSP staple | HIGH | No status_request response on production | RFC 6066, CA/B BR |
| Fewer than 2 SCTs embedded | HIGH | CT-policy violation (Chrome enforces) | RFC 6962, CA/B Baseline Reqs |
| Intermediate served out of RFC 5246 order | MEDIUM | Server sends root before leaf | RFC 5246 §7.4.2 |
| AIA extension missing | MEDIUM | No CA Issuers / OCSP URL in cert | RFC 5280 §4.2.2.1 |
| Over-broad wildcard | HIGH | Scope of 2-level or wider (e.g., *.com) | CA/B Baseline Reqs §3.2.2 |
| Wildcard at apex SAN | LOW | *.example.com without example.com | RFC 6125 §6.4.3 |
| Key Usage missing digitalSignature | MEDIUM | KU bit absent for TLS server cert | RFC 5280 §4.2.1.3 |
| Cert chain longer than 4 | LOW | Performance + trust expansion | CA/B Baseline Reqs |
cryptography libraryopenssl CLI 1.1.1+ (for OCSP query + chain enumeration)references/AUTHORIZATION.md
in skill #1 analyzing-tls-config for the canonical pattern)Active scan; ask the user verbatim:
"Do you have authorization to perform TLS testing on this target? I need confirmation before proceeding."
python3 ${CLAUDE_PLUGIN_ROOT}/skills/detecting-ssl-cert-issues/scripts/check_cert_chain.py \
https://target.example.com \
--authorizedOptions:
Usage: check_cert_chain.py URL [OPTIONS]
Options:
--authorized Attest authorization for non-local targets (required)
--port PORT Target port (default: 443)
--output FILE Write findings to FILE (default: stdout)
--format FMT json | jsonl | markdown (default: markdown)
--min-severity SEV critical|high|medium|low|info (default: info)
--timeout SECS Per-probe timeout (default: 10)
--skip-ocsp Skip OCSP responder query (offline mode)CRITICAL/HIGH map to immediate action items; MEDIUM/LOW to backlog
hardening. Cross-reference references/PLAYBOOK.md for OCSP stapling
config snippets per server type.
checking-http-security-headers (#4) to
verify HSTS preload status — HSTS preload depends on a clean cert
chain to be effective.references/PLAYBOOK.md § CI
posture-monitoring.User: "We're considering Must-Staple — what's our OCSP stapling posture look like across endpoints?"
for ENDPOINT in https://api.example.com https://app.example.com https://admin.example.com; do
python3 ${CLAUDE_PLUGIN_ROOT}/skills/detecting-ssl-cert-issues/scripts/check_cert_chain.py \
"$ENDPOINT" --authorized --min-severity medium
doneIf any endpoint reports "Missing OCSP staple" HIGH, adopting Must-Staple
on that cert breaks it on next renewal until OCSP-stapling config
lands. Pair with references/PLAYBOOK.md § OCSP stapling for nginx /
Caddy / Apache config.
User: "Pre-launch — does our cert have enough SCTs for Chrome to trust it?"
python3 ${CLAUDE_PLUGIN_ROOT}/skills/detecting-ssl-cert-issues/scripts/check_cert_chain.py \
https://new-site.example.com --authorizedThe scanner extracts embedded SCTs from the cert's CT extension. <2 SCTs → HIGH finding; Chrome's CT enforcement policy rejects the connection silently in HTTPS, leaving users with a generic error.
User: "An auditor flagged our wildcard cert as too broad."
python3 ${CLAUDE_PLUGIN_ROOT}/skills/detecting-ssl-cert-issues/scripts/check_cert_chain.py \
https://example.com --authorized --format json | jq '.[] | select(.title | contains("wildcard"))'The JSON output captures the wildcard scope; pair with the auditor's request to either narrow the SAN list or move to per-service certs.
JSON / JSONL / Markdown per lib/report.py. Exit codes: 0 clean, 1
high/critical, 2 error.
references/THEORY.md — OCSP, CT, AIA, chain ordering, wildcard
scope reasoning with RFC anchorsreferences/PLAYBOOK.md — OCSP stapling config per server type +
CT-log compliance + AIA extension correctness../analyzing-tls-config/references/AUTHORIZATION.md — canonical ROE
template + 2-step gate (shared across all active-scan skills)© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 3 other files (scripts, references) in skills/.curated/detecting-ssl-cert-issues of jeremylongshore/tons-of-skills-marketplace.
Open the folder on GitHubat commit cfae287
Detecting Ssl Cert Issues next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Detecting Ssl Cert Issues this skilljeremylongshore/tons-of-skills-marketplace | 2.8k | — | ~1.7k | Automated safety check: Pass | MIT | |
| Implementing Hashicorp Vault Dynamic Secretsmukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~5.2k | Automated safety check: Pass | Apache-2.0 | |
| Implementing Tlsancoleman/ai-design-components | 525 | — | ~3.6k | Automated safety check: Notes | MIT | |
| Performing Ssl Certificate Lifecycle Managementmukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~867 | Automated safety check: Pass | Apache-2.0 | |
| Auditing Tls Certificate Transparency Logsmukul975/Anthropic-Cybersecurity-Skills | 34k | — | ~4k | Automated safety check: Pass | Apache-2.0 | |
| Trust Center BuilderGRCEngClub/claude-grc-engineering | 419 | — | ~2.6k | Automated safety check: Pass | Custom licence |
mukul975/Anthropic-Cybersecurity-Skills
Configures HashiCorp Vault dynamic secrets engines for database credentials, AWS IAM keys, and PKI certificates, with automatic generation, lease management, and rotation to eliminate static secrets…
ancoleman/ai-design-components
Configure TLS certificates and encryption for secure communications.
mukul975/Anthropic-Cybersecurity-Skills
Automates the full SSL/TLS certificate lifecycle, including generating Certificate Signing Requests, issuing, deploying, monitoring, renewing, and revoking X.509 certificates, using Python and ACME…
mukul975/Anthropic-Cybersecurity-Skills
Monitors Certificate Transparency (CT) logs to detect unauthorized certificate issuance, discover subdomains via CT data, and alert on suspicious certificate activity for owned domains.
GRCEngClub/claude-grc-engineering
Builds and deploys a serverless trust center that publishes a company's compliance posture, with gated access to audit reports and an admin dashboard.
BagelHole/DevOps-Security-Agent-Skills
Apply CIS benchmarks and secure Linux servers. An agent skill from BagelHole/DevOps-Security-Agent-Skills.
jeremylongshore/tons-of-skills-marketplace
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jeremylongshore/tons-of-skills-marketplace
Build this skill automates the adaptation of pre-trained machine learning models using transfer learning techniques.
jeremylongshore/tons-of-skills-marketplace
Execute proactive auto-loading: automatically detects and loads agents.md files.
jeremylongshore/tons-of-skills-marketplace
Aggregate and centralize performance metrics from applications, systems, databases, caches, and services.
jeremylongshore/tons-of-skills-marketplace
Execute this skill enables AI assistant to analyze capacity requirements and plan for future growth.
jeremylongshore/tons-of-skills-marketplace
Process use when you need to work with database indexing. An agent skill from jeremylongshore/tons-of-skills-marketplace.
Categories
Audit a target's TLS certificate beyond protocol/expiry — chain ordering, OCSP stapling, revocation status, Certificate Transparency presence, key-usage flags, and over-broad wildcards. Detecting Ssl Cert Issues is an agent skill from jeremylongshore/tons-of-skills-marketplace. Audit a target's TLS certificate beyond protocol/expiry — chain ordering, OCSP stapling, revocation status, Certificate Transparency presence, key-usage flags, and over-broad wildcards.
Detecting Ssl Cert Issues fits situations like: : TLS handshake already passes (skill 1 analyzing-tls-config cleared) but you suspect the cert posture is fragile; with: check cert revocation; cert chain audit.
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a claude-code`. Or copy the skill folder (skills/.curated/detecting-ssl-cert-issues in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/detecting-ssl-cert-issues in your project. Claude Code loads it when a task matches its description.
Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a codex`. Or copy the skill folder (skills/.curated/detecting-ssl-cert-issues in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/detecting-ssl-cert-issues in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill detecting-ssl-cert-issues -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/detecting-ssl-cert-issues, .gemini/skills/detecting-ssl-cert-issues, .github/skills/detecting-ssl-cert-issues and .opencode/skills/detecting-ssl-cert-issues in your project.
Going by SKILL.md and its folder, Detecting Ssl Cert Issues needs Python for the scripts in its folder and the command-line tools its instructions call (python3 and jq). Our summary lists: Python 3. Its frontmatter pre-approves these tools: Read, Bash(python3:*), Bash(openssl:*). Compatibility (from SKILL.md): Designed for Claude Code.
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
Detecting Ssl Cert Issues is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
About 1.7k tokens (SKILL.md is roughly 6.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.8k tokens, read only when the agent opens those files.
Skills that share tags, products or a category with Detecting Ssl Cert Issues: Implementing Hashicorp Vault Dynamic Secrets (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Implementing Tls (ancoleman/ai-design-components, 525 stars), Performing Ssl Certificate Lifecycle Management (mukul975/Anthropic-Cybersecurity-Skills, 34k stars) and Auditing Tls Certificate Transparency Logs (mukul975/Anthropic-Cybersecurity-Skills, 34k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.
Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.
