Add domainer-cli foundational skill

Foundational/domainer-cli/SKILL.md

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+---
+name: domainer-cli
+description: Check domain name availability individually or in bulk.
+metadata:
+  author: vibecode-dev
+  version: "1.0"
+---
+
+<tool>
+<name>domainer-cli</name>
+<description>Command line client for checking domain name availability.</description>
+
+<download>
+- macOS (Apple Silicon): https://domains.vibecodeapp.com/download/darwin/arm64/domainer-cli
+- macOS (Intel): https://domains.vibecodeapp.com/download/darwin/amd64/domainer-cli
+- Linux (x86_64): https://domains.vibecodeapp.com/download/linux/amd64/domainer-cli
+- Windows (x86_64): https://domains.vibecodeapp.com/download/windows/amd64/domainer-cli
+
+After downloading, make the binary executable and install (macOS/Linux):
+
+    mkdir -p ~/.local/bin
+    chmod +x domainer-cli
+    mv domainer-cli ~/.local/bin/domainer-cli
+</download>
+
+<!-- Everything below is the output of: domainer-cli --help -->
+
+<global-flags>
+      --debug           Enable debug logging to stderr
+      --output string   Output format: "text" or "json" (default "text")
+</global-flags>
+
+<output-formats>
+The --output flag controls output for all commands:
+- text (default): logfmt style key=value pairs, one line per result. Designed for grep and cut.
+- json: single JSON object per invocation. Designed for jq.
+</output-formats>
+
+<command name="check">
+<synopsis>Check whether a single domain name is available for registration.</synopsis>
+<usage>domainer-cli check &lt;domain&gt;</usage>
+<examples>
+  # Check if a domain is available
+  domainer-cli check example.com
+
+  # Output as JSON
+  domainer-cli check --output json example.com
+
+  # Extract just the availability boolean
+  domainer-cli check --output json example.com | jq '.available'
+
+  # Conditionally print a message based on availability
+  domainer-cli check --output json example.com | jq --raw-output 'if .available then "GO: \(.name)" else "TAKEN: \(.name)" end'
+
+  # Filter for available domains in a shell loop
+  domainer-cli check example.com | grep --fixed-strings "status=available"
+</examples>
+<text-output>
+domain=example.com status=available
+</text-output>
+<json-output>
+{"name":"example.com","available":true}
+</json-output>
+</command>
+
+<command name="check-bulk">
+<synopsis>Check availability of domain names listed in a file (one per line). Pass - or omit the file to read from stdin.</synopsis>
+<usage>domainer-cli check-bulk [file] [flags]</usage>
+<flags>
+      --append-tld strings   TLDs to append to each name (e.g. --append-tld com --append-tld ai)
+</flags>
+<examples>
+  # Check all domains in a file
+  domainer-cli check-bulk domains.txt
+
+  # Output as JSON
+  domainer-cli check-bulk --output json domains.txt
+
+  # Check names with specific TLDs (file contains bare names like "myapp")
+  domainer-cli check-bulk --append-tld com --append-tld ai names.txt
+
+  # Filter for only available domains
+  domainer-cli check-bulk domains.txt | grep --fixed-strings "status=available"
+
+  # Filter for unavailable domains
+  domainer-cli check-bulk domains.txt | grep --fixed-strings "status=unavailable"
+
+  # Extract just the available domain names
+  domainer-cli check-bulk domains.txt | grep --fixed-strings "status=available" | cut --delimiter="=" --fields=2 | cut --delimiter=" " --fields=1
+
+  # List only available domains as JSON
+  domainer-cli check-bulk --output json domains.txt | jq --raw-output '.available[]'
+
+  # Count available vs total
+  domainer-cli check-bulk --output json domains.txt | jq '{total: ((.available | length) + (.unavailable | length)), available: (.available | length)}'
+
+  # List only unavailable domains as JSON
+  domainer-cli check-bulk --output json domains.txt | jq --raw-output '.unavailable[]'
+
+  # Read domain names from stdin
+  echo -e "a.com\nb.com" | domainer-cli check-bulk
+
+  # Pipe names through with TLD expansion
+  cat names.txt | domainer-cli check-bulk --append-tld com --append-tld ai -
+</examples>
+<text-output>
+domain=a.com status=available
+domain=b.com status=unavailable
+domain=c.com status=available
+</text-output>
+<json-output>
+{"available":["a.com","c.com"],"unavailable":["b.com"]}
+</json-output>
+</command>
+
+</tool>