Add scoped X public data source

[kriptoburak]

Description

Adds a scoped X/Twitter public-data source to the offensive OSINT tooling quick-install section, with an install command pinned to the current x-developer package. The copy keeps the use case limited to authorized public-source collection and avoids private account access or publishing workflows by default.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New section / capability (non-breaking change which adds functionality)
• Wordlist / catalog expansion (non-breaking)
• Vendor fingerprint / secret pattern / dork addition (non-breaking)
• Documentation update
• Renumbering / restructuring (potentially breaking)
• Test addition (smoke-test prompt)

Affected skills

• osint-methodology
• offensive-osint
• Both
• Repo infrastructure only (READMEs, docs, CI, etc.)

Affected sections (if applicable)

• arsenal §46.13

Checklist

• My change is OSINT-only (no active exploitation, post-exploit, malware tradecraft).
• I updated CHANGELOG.md under [Unreleased].
• I updated the README's "What's in the box" tables (if I added a section).
• I added trigger phrases to the YAML frontmatter (if I added a new triggerable concept).
• I added a self-test prompt to tests/smoke-test-prompts.md (if I added a new capability).
• Severity / detectability / confidence tags are consistent with existing rubrics.
• I tested locally (installed the modified skill in Claude Code and verified the relevant prompts).
• My commits follow the format <type>(<scope>): <subject>.

Sample prompt that exercises this change

Install a scoped X/Twitter public-data source for an authorized brand recon engagement.

Expected response

Claude should route to arsenal §46.13, give the pinned x-developer@2.4.16 install command, link to Xquik docs, and keep the workflow limited to authorized public X/Twitter collection.

Related issues

None.

Additional notes

Validation run:

• git diff --check
• YAML frontmatter parse for both SKILL.md files
• python3 -m py_compile skills/offensive-osint/scripts/secret_scan.py skills/offensive-osint/scripts/h1_reference.py
• npm view x-developer@2.4.16 version
• curl -L https://docs.xquik.com

Default markdownlint was not clean on the existing repository before isolating this patch. I did not rewrite unrelated historical markdown style issues.