Secret Detector

Nothing sensitive exits the local machine without explicit human awareness.

When This Skill Activates

• Any content is about to be written outside ~/.starlight/ to an external destination
• Any vault export is generated for a platform adapter
• Any content is passed to an external MCP server
• Keywords: "export", "publish", "send", "upload", "share", "transmit"
• Default for: Starlight Sentinel

What This Skill Does

Scans content for credential patterns, personal identifiers, and sensitive data before it leaves the local machine. Blocks export if secrets are found. Never auto-redacts — always surfaces findings to the user for an explicit decision.

Procedures

Procedure 1: Pre-Export Scan

1. Receive content blob pending export

2. Run pattern detection against the full content:

   Pattern	Example	Action on match
   API keys	sk-..., pk_..., ghp_..., xoxb-...	BLOCK + report
   Private keys	-----BEGIN PRIVATE KEY-----	BLOCK + report
   Passwords in config	password=, passwd=, secret=	BLOCK + report
   Email addresses	user@domain.com in unexpected context	WARN + report
   Phone numbers	+1-555-..., formatted phone patterns	WARN + report
   Credit card patterns	16-digit sequences with separators	BLOCK + report
   Government IDs	SSN patterns, national ID formats	BLOCK + report

3. If BLOCK patterns found: halt export, generate SECRET_SCAN_REPORT.md, present to user

4. If WARN patterns found: present to user with option to proceed or redact

5. If clean: return APPROVED for export

Procedure 2: Scan Report Generation

1. Create /security/SECRET_SCAN_REPORT.md
2. Include: content source, patterns detected, line references (not the secrets themselves)
3. Present options: [redact and retry] / [cancel export] / [I confirm this is safe, proceed]
4. Log the decision with user action

Procedure 3: False Positive Handling

1. User declares a detected pattern is not sensitive
2. Record the declaration with timestamp + user confirmation
3. Add to local allowlist for this session (not persisted globally)
4. Proceed with export

Integration Points

• Vaults: No vault access needed — operates purely on content in transit
• Agents: Starlight Sentinel
• Skills: Composes with private-public-split for structural classification; permission-gate for the approval flow
• Claws: Called by every Claw that generates exports (Memory, Creator, Attestation, Reclamation)

Quality Criteria

• Zero false negatives on common credential patterns
• False positives surface clearly as warnings, not blocks (where safe)
• User is always in control — no silent redaction or silent pass
• Scan report is human-readable, not a raw regex dump