mtg_python_deckbuilder/RELEASE_NOTES_TEMPLATE.md

MTG Python Deckbuilder ${VERSION}

Unreleased (Draft)

Added

• Theme picker performance: precomputed summary projections + lowercase haystacks and memoized filtered slug cache (keyed by (etag, q, archetype, bucket, colors)) for sub‑50ms typical list queries on warm path.
• Skeleton loading UI for theme picker list, preview modal, and initial shell.
• Theme preview endpoint (/themes/api/theme/{id}/preview + HTML fragment) returning representative sample with roles (payoff/enabler/support/wildcard/example/curated_synergy/synthetic).
• Commander bias heuristics in preview sampling (color identity filtering + overlap/theme bonuses) for context-aware suggestions.
• In‑memory TTL (600s) preview cache with metrics (requests, cache hits, average build ms) exposed at diagnostics endpoint.
• Web UI: Double-faced card (DFC) hover support with single-image overlay flip control (top-left button, keyboard (Enter/Space/F), aria-live), persisted face (localStorage), and immediate refresh post-flip.
• Diagnostics flag WEB_THEME_PICKER_DIAGNOSTICS=1 gating fallback description flag, editorial quality badges, uncapped synergy lists, raw YAML fetch, and metrics endpoint (/themes/metrics).
• Catalog & preview metrics endpoint combining filter + preview counters & cache stats.
• Performance headers on list & API responses: X-ThemeCatalog-Filter-Duration-ms and ETag for conditional requests.
• Cache bust hooks tied to catalog refresh & tagging completion clear filter/preview caches (metrics now include last bust timestamps).
• Governance metrics: example_enforcement_active, example_enforce_threshold_pct (threshold default 90%) signal when curated coverage enforcement is active.
• Server authoritative mana & color identity fields (mana_cost, color_identity_list, pip_colors) included in preview/export; legacy client parsers removed.

Changed

• Preview assembly now pins curated example_cards then synergy_example_cards before heuristic sampling with diversity quotas (~40% payoff, 40% enabler/support, 20% wildcard) and synthetic placeholders only when underfilled.
• List & API filtering route migrated to optimized path avoiding repeated concatenation / casefolding work each request.
• Hover system consolidated to one global panel; removed fragment-specific duplicate & legacy large-image hover. Thumbnails enlarged & unified (110px → 165px → 230px). Hover activation limited to thumbnails; stability improved (no dismissal over flip control); DFC markup simplified to single with opacity transition.

Deprecated

• (None new)

Fixed

• Resolved duplicate template environment instantiation causing inconsistent navigation globals in picker fragments.
• Ensured preview cache key includes catalog ETag preventing stale samples after catalog reload.

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Added

• Theme whitelist governance (config/themes/theme_whitelist.yml) with normalization, enforced synergies, and synergy cap (5).
• Expanded curated synergy matrix plus PMI-based inferred synergies (data-driven) blended with curated anchors.
• Test: test_theme_whitelist_and_synergy_cap.py validates enforced synergy presence and cap compliance.
• PyYAML dependency for governance parsing.

Changed

• Theme normalization (ETB -> Enter the Battlefield, Self Mill -> Mill, Pillow Fort -> Pillowfort, Reanimator -> Reanimate) applied prior to synergy derivation.
• Synergy output capped to 5 entries per theme (curated > enforced > inferred ordering).

Fixed

• Removed ultra-rare themes (frequency <=1) except those protected/always included via whitelist.
• Corrected commander eligibility: restricts non-creature legendary permanents. Now only Legendary Creatures (incl. Artifact/Enchantment Creatures), qualifying Legendary Artifact Vehicles/Spacecraft with printed P/T, or any card explicitly stating "can be your commander" are considered. Plain Legendary Enchantments (non-creature), Planeswalkers without the text, and other Legendary Artifacts are excluded.

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