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docs/modules/issuer-directory/README.md

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+# IssuerDirectory
+
+**Status:** Implemented
+**Source:** `src/IssuerDirectory/`
+**Owner:** VEX Guild
+
+## Purpose
+
+IssuerDirectory maintains a trust registry of CSAF publishers and VEX statement issuers. Provides discovery, validation, and trust scoring for upstream vulnerability advisories and VEX statements.
+
+## Components
+
+**Services:**
+- `StellaOps.IssuerDirectory` - Main service for issuer registry management and API
+
+## Configuration
+
+See `etc/issuer-directory.yaml.sample` for configuration options.
+
+Key settings:
+- PostgreSQL connection (schema: `issuer_directory`)
+- Authority integration settings
+- Issuer discovery endpoints
+- Trust validation policies
+- CSAF provider metadata validation
+
+## Dependencies
+
+- PostgreSQL (schema: `issuer_directory`)
+- Authority (authentication)
+- Concelier (consumes issuer metadata)
+- VexHub (consumes issuer trust data)
+- VexLens (trust scoring integration)
+
+## Related Documentation
+
+- Architecture: `./architecture.md`
+- Concelier: `../concelier/`
+- VexHub: `../vexhub/`
+- VexLens: `../vex-lens/`
+
+## Current Status
+
+Implemented with CSAF publisher discovery and validation. Supports issuer metadata storage and trust registry queries. Integrated with VEX ingestion pipeline.