docs(16-03): complete Postman, SwaggerHub, RapidAPI plan

- SUMMARY with 2 tasks, 6 files, all tests passing
- STATE.md updated with progress and decisions
- REQUIREMENTS.md: RECON-API-01, RECON-API-02 marked complete

.planning/phases/16-osint_threat_intel_mobile_dns_api_marketplaces/16-03-SUMMARY.md

@@ -0,0 +1,59 @@
+---
+phase: 16-osint-threat-intel-mobile-dns-api-marketplaces
+plan: 03
+subsystem: recon-sources
+tags: [osint, api-marketplace, postman, swaggerhub, rapidapi, recon]
+dependency_graph:
+  requires: [recon.ReconSource interface, sources.Client, BuildQueries, ciLogKeyPattern]
+  provides: [PostmanSource, SwaggerHubSource, RapidAPISource]
+  affects: [RegisterAll wiring]
+tech_stack:
+  added: []
+  patterns: [credentialless API marketplace scanning, HTML scraping for RapidAPI, JSON API for Postman/SwaggerHub]
+key_files:
+  created:
+    - pkg/recon/sources/postman.go
+    - pkg/recon/sources/postman_test.go
+    - pkg/recon/sources/swaggerhub.go
+    - pkg/recon/sources/swaggerhub_test.go
+    - pkg/recon/sources/rapidapi.go
+    - pkg/recon/sources/rapidapi_test.go
+  modified: []
+decisions:
+  - All three sources are credentialless -- Postman and SwaggerHub have public APIs, RapidAPI is scraped
+  - RapidAPI uses HTML scraping approach since its internal search API is not stable
+  - SwaggerHub fetches full spec content after search to scan example values for keys
+metrics:
+  duration: 2min
+  completed: 2026-04-06
+  tasks: 2
+  files: 6
+---
+
+# Phase 16 Plan 03: Postman, SwaggerHub, RapidAPI Sources Summary
+
+API marketplace recon sources scanning public Postman collections, SwaggerHub API specs, and RapidAPI listings for hardcoded API keys in examples and documentation.
+
+## Task Results
+
+### Task 1: Postman and SwaggerHub sources
+- **Commit:** edde02f
+- **PostmanSource:** Searches via Postman internal search proxy (`/ws/proxy`) for key patterns in collection snippets
+- **SwaggerHubSource:** Two-phase: search public specs, then fetch each spec and scan for keys in example values, server URLs, security scheme defaults
+- **Tests:** 8 tests (Name, Enabled, Sweep with match, Sweep empty) for both sources
+
+### Task 2: RapidAPI source
+- **Commit:** 297ad3d
+- **RapidAPISource:** Scrapes public search result pages for key patterns in code examples and descriptions
+- **Confidence:** Set to "low" (HTML scraping is less precise than JSON API parsing)
+- **Tests:** 4 tests (Name, Enabled, Sweep with match, Sweep clean HTML)
+
+## Deviations from Plan
+
+None -- plan executed exactly as written.
+
+## Known Stubs
+
+None. All three sources are fully functional with real API endpoint patterns.
+
+## Self-Check: PASSED