feat: integrate last30days and daily-news-report skills

skills/last30days/TASKS.md

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+# last30days Implementation Tasks
+
+## Setup & Configuration
+- [x] Create directory structure
+- [x] Write SPEC.md
+- [x] Write TASKS.md
+- [x] Write SKILL.md with proper frontmatter
+
+## Core Library Modules
+- [x] scripts/lib/env.py - Environment and API key loading
+- [x] scripts/lib/dates.py - Date range and confidence utilities
+- [x] scripts/lib/cache.py - TTL-based caching
+- [x] scripts/lib/http.py - HTTP client with retry
+- [x] scripts/lib/models.py - Auto model selection
+- [x] scripts/lib/schema.py - Data structures
+- [x] scripts/lib/openai_reddit.py - OpenAI Responses API
+- [x] scripts/lib/xai_x.py - xAI Responses API
+- [x] scripts/lib/reddit_enrich.py - Reddit thread JSON fetcher
+- [x] scripts/lib/normalize.py - Schema normalization
+- [x] scripts/lib/score.py - Popularity scoring
+- [x] scripts/lib/dedupe.py - Near-duplicate detection
+- [x] scripts/lib/render.py - Output rendering
+
+## Main Script
+- [x] scripts/last30days.py - CLI orchestrator
+
+## Fixtures
+- [x] fixtures/openai_sample.json
+- [x] fixtures/xai_sample.json
+- [x] fixtures/reddit_thread_sample.json
+- [x] fixtures/models_openai_sample.json
+- [x] fixtures/models_xai_sample.json
+
+## Tests
+- [x] tests/test_dates.py
+- [x] tests/test_cache.py
+- [x] tests/test_models.py
+- [x] tests/test_score.py
+- [x] tests/test_dedupe.py
+- [x] tests/test_normalize.py
+- [x] tests/test_render.py
+
+## Validation
+- [x] Run tests in mock mode
+- [x] Demo --emit=compact
+- [x] Demo --emit=context
+- [x] Verify file tree