docs(06-03): complete CLI args and cookie wiring plan

.planning/phases/06-auth-cli/06-03-SUMMARY.md

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+---
+phase: 06-auth-cli
+plan: '03'
+subsystem: cli
+tags: [cookies, input-file, cli, authentication, extractors]
+
+# Dependency graph
+requires:
+  - phase: 06-auth-cli
+    provides: Cookie parsing and browser extraction from plans 01-02
+provides:
+  - --input-file URL reading from file
+  - --cookies CLI argument wired to extractors
+  - --cookies-from-browser wired to extractors
+  - Cookie support in Twitter and Instagram extractors
+affects: [extraction, CLI]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: [cookie injection via Extractor trait]
+
+key-files:
+  created: []
+  modified: [src/lib.rs, src/main.rs, src/extractor/base.rs, src/extractor/extractors/twitter.rs, src/extractor/extractors/instagram.rs]
+
+key-decisions:
+  - "Added set_cookies() method to Extractor trait for dynamic cookie injection"
+  - "Extractors that need auth (Twitter, Instagram) override set_cookies()"
+
+patterns-established:
+  - "Extractor trait now supports optional cookie injection"
+  - "main.rs loads cookies early and passes to extractors during extraction"
+
+# Metrics
+duration: 5 min
+completed: 2026-02-16T09:21:01Z
+---
+
+# Phase 6 Plan 3: Wire CLI Args & Cookie Support Summary
+
+**CLI args and cookies wired to extraction pipeline**
+
+## Performance
+
+- **Duration:** 5 min
+- **Started:** 2026-02-16T09:15:59Z
+- **Completed:** 2026-02-16T09:21:01Z
+- **Tasks:** 3
+- **Files modified:** 5
+
+## Accomplishments
+- Added --input-file URL reading (loads URLs from file, ignores # comments)
+- Wired --cookies and --cookies-from-browser to extractors
+- Added set_cookies() method to Extractor trait
+- Twitter and Instagram extractors receive cookies during initialization
+- All 145 library tests pass
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Export auth module in lib.rs** - `3bae7656` (feat)
+2. **Task 2: Add input-file URL reading** - `1e73893a` (feat)
+3. **Task 3: Wire cookies to extractors** - `1cda24bf` (feat)
+
+**Plan metadata:** (to be committed)
+
+## Files Created/Modified
+- `src/lib.rs` - Added extract_browser_cookies export
+- `src/main.rs` - Added input-file loading and cookie wiring
+- `src/extractor/base.rs` - Added set_cookies() method to trait
+- `src/extractor/extractors/twitter.rs` - Implemented set_cookies()
+- `src/extractor/extractors/instagram.rs` - Implemented set_cookies()
+
+## Decisions Made
+- Added set_cookies() method to Extractor trait (default no-op) for dynamic cookie injection
+- Extractors that need authentication override set_cookies() to receive cookies at runtime
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+- CLI cookie support fully wired
+- Ready for remaining Phase 6 plans (OAuth, simulate, destination)
+
+---
+
+*Phase: 06-auth-cli*
+*Completed: 2026-02-16*
+
+## Self-Check: PASSED
+
+- [x] src/lib.rs modified (1 line added)
+- [x] src/main.rs modified (input-file and cookie wiring)
+- [x] src/extractor/base.rs modified (set_cookies method)
+- [x] Twitter and Instagram extractors implement set_cookies
+- [x] Commits present: 3bae7656, 1e73893a, 1cda24bf
+- [x] All 145 library tests pass