Port authored Age features and Star Fissures to 26.3 beta

Advance to 1.0.1.54-beta.1 after player validation. Port material, vegetation, lake, terrain-volume, crystal, Dense Ores and fissure features with saved plans. Update beta documentation and release notes.

Refs #98, #104

docs/MINECRAFT_26_3_PORT.md

@@ -522,6 +522,165 @@ terrain, biome, and structure generation. Cave and Void are intentionally
 excluded until their feature placement rules are ported. This is not yet the
 full 1.21.1 feature grammar or instability system.
 
+The local `1.0.1.42-beta.1` follow-up resolves unmodified Rocks to a
+seed-shuffled, full-block material and accepts up to 32 ordered Rocks pages.
+Each page adds an independent, deterministic surface placement attempt.
+Explicit Block modifiers still bind only to the immediately following Rocks
+page. The material sequence persists in the Age index; the codec also reads
+the single-material format from the previous beta. The remaining feature
+families and instability scoring are not yet ported.
+
+The local `1.0.1.43-beta.1` slice uses 26.3's `minecraft:forest_rock`
+placed-feature rules and `BlockBlobFeature` for authored Rocks, supplying the
+Age's selected material and removing only the vanilla biome filter. This
+replaces the port's temporary 3×3 pile algorithm and follows the 1.21.1
+generator's authored-placement approach. It affects new chunks only.
+
+The local `1.0.1.44-beta.1` slice extends this Age-scoped feature wrapper to
+Flowers, Trees, and Huge Trees. Ordered authored pages retain independent
+attempts and use vanilla 26.3 placed-feature rules after biome decoration.
+The vegetation plan is persisted alongside terrain, biome, and Rocks plans;
+the dedicated-server smoke compares generated flowers and logs against a
+same-seed Flat control and checks persistence after restart.
+
+The local `1.0.1.45-beta.1` slice adds authored Dungeons separately from
+surface vegetation. Its 26.3 placed-feature JSON mirrors the 1.21.1 eight
+monster-room attempts over the world height; ordered duplicate pages add
+attempts. The count persists in the Age index and generator codec. The server
+smoke creates and samples a dungeon Age, counts monster spawners across a
+4×4-chunk area, and verifies the count after restart. Room appearance and
+normal book authoring remain in-game checks.
+
+The local `1.0.1.46-beta.1` slice ports Surface Lakes, Deep Lakes, and Small
+Lakes, including ordered Fluid modifiers. The 26.3 LakeFeature retains its
+vanilla shape and replacement predicates while using the Age's frozen fluid
+provider. Surface placement keeps Rivencraft 1.21.1's one-in-twelve rarity;
+underground lakes use vanilla placement. Repeated unmodified pages resolve
+their fluids independently from a seeded, shuffled source-fluid pool. Lake
+plans participate in restore, unload/reload, reseed, and retirement rollback.
+The server smoke compares water generation against a same-seed control and
+checks explicit/random plans and fluid blocks across restart.
+
+The local `1.0.1.47-beta.1` slice adapts the 1.21.1 FloatingIslandFeature
+algorithm to 26.3 chunk access and the biomes already assigned to each chunk.
+It retains source range 3, one-in-128 candidate rarity, Y=168..215 center
+selection, radii 24..41, coordinate-noise contours, air-only filling, and the
+biome-dependent soil cap. It supports Flat/Void in addition to noise terrains;
+Block modifiers and independent seeded random materials are frozen in an
+ordered terrain-feature plan. Rocks and islands share material resolution.
+
+26.3's final NoiseBasedChunkGenerator merges noise, surface, and carving and
+does not expose a pre-surface hook. This port appends islands to the completed
+terrain future before decoration; existing terrain is preserved, but base
+carvers do not cut the added islands. The smoke verifies actual high-altitude
+material placement on noise, Flat, and Void terrain, distinct random material
+choices, authored biome preservation, and block fingerprints across restart.
+
+The local `1.0.1.48-beta.1` slice ports TendrilFeature's Legacy-derived
+branching solid volumes using the 26.3 chunk mutation and height APIs. Source
+range 8, rate 15, size 18, nested node/height selection, branch splitting, and
+bedrock preservation match the 1.21.1 implementation. Chunk-local writes and
+neighbor-source seeds preserve continuous paths across chunk borders.
+
+The existing terrain-feature plan now supports Tendrils on all terrain types,
+including Cave and Void. Compilation retains mixed feature order and applies
+the 32-occurrence limit per feature. Block modifiers and seeded random choices
+use the shared solid-material resolver; existing save/lifecycle handling carries
+both feature types. World validation is manual at the player's request; no
+development server is started for this slice.
+
+The local `1.0.1.49-beta.1` slice ports the Legacy-derived Skylands filter
+from Rivencraft 1.21.1 with 26.3 chunk height/mutation APIs. The cutoff uses
+the same salt, seven octaves, initial cell width 128, amplitude 12, and base
+Y=76. Solid/liquid removal and world-height coverage match the reference.
+It runs once after base terrain construction and before authored solid
+volumes, retaining the feature ordering used by the 1.21.1 implementation.
+
+Skylands is a material-free feature, accepted alongside every terrain type.
+Repeated pages retain the same idempotent effect. The existing terrain-feature
+plan stores an optional Skylands flag, defaulting to false for earlier beta
+Ages; no separate backend/lifecycle path is introduced. A Skylands-only plan
+can contain no material choices. Build and static checks are automated; world
+generation and restart validation are left to the player.
+
+The local `1.0.1.50-beta.1` slice adapts the 1.21.1 SpheresFeature and
+SpikesFeature to 26.3. Spheres retain their source range 8, five-percent
+source chance, nested Y selection starting at 32, node geometry, and bedrock
+protection. They run after the base terrain/Skylands filter and work on every
+terrain type. Spikes retain their one-in-18 chunk chance, 6..37 height roll,
+width 1..4, solid-footprint checks, and chunk-local writes during decoration.
+They remain unavailable on Cave and Void terrain, matching 1.21.1.
+
+Both page types use ordered saved solid-feature choices, preceding Block
+modifiers, and independent seeded materials/occurrences. No backend lifecycle
+branch or generated artwork is added. Compilation and static review are the
+automated checks; the player handles generation and restart validation.
+
+The local `1.0.1.51-beta.1` slice ports ObelisksFeature using the 26.3 chunk
+coordinates and world-height APIs. The site salt, seed mixing, one-in-128
+chance, chunk-local site selection, 4×4 plinth, and 2×12×2 shaft match 1.21.1.
+Every footing column must be sturdy, dry, and free of block entities; the
+base surface can vary by at most two blocks and the full shaft must be open.
+No partial structure is written when a placement check fails.
+
+The page joins the existing material-feature plan and shared material resolver.
+It runs during surface decoration, with its own occurrence counter, on all
+surface terrain types including Flat; Cave and Void remain unsupported.
+Spikes and Obelisks use shared stage/restriction classification. Build/static
+checks are automated; generation and restart checks remain with the player.
+
+The local `1.0.1.52-beta.1` slice ports CrystalFormationsFeature directly
+from 1.21.1 with only registry, ChunkPos, and height API substitutions. It
+retains the site salt, one-in-fifteen rarity, 3×3 ground/clearance checks,
+three-block center height, randomized outer heights, budding hearts, and
+initial small buds. Existing blue crystal growth, sprites, drops, and sounds
+are reused without adding assets.
+
+Crystal Formations is an ordered surface feature with fixed crystal material,
+not a consumer of Block/Fluid modifiers. It shares the existing saved feature
+plan and surface-terrain restrictions (including Flat, excluding Cave/Void),
+with independent occurrence seeds and the current 32-page cap. No backend
+lifecycle changes are needed. The Obelisks slice passed the player's in-game
+check; Crystal Formations build/static checks pass, with generation, growth,
+and restart validation handed to the player. No test server is started.
+
+The local `1.0.1.53-beta.1` slice adapts 1.21.1 AgeDenseOres to modern
+`AbstractOreFeature` targets and `FeaturePlacer.placeWithBiomeCheck`. It keeps
+the common ore tag/name fallback, explicit `rivencraft:dense_ores` placed-
+feature opt-in tag, nearby biome discovery, stable registry-ID ordering,
+and independent per-occurrence seeds. Registered modded ore features remain
+eligible without depending on an ore-providing mod. Biomes and ore placements
+are collected once per chunk rather than once per repeated page.
+
+The optional Dense Ores count is saved in the existing terrain-feature plan;
+older plans default to zero. Grammar accepts 1–32 occurrences on noise terrain
+(including Cave), rejects Flat/Void and material modifiers, and checks explicit
+biome pools for at least one eligible ore feature. No extra lifecycle path or
+asset is introduced. Random feature selection and instability remain later
+port work. Crystal Formations passed the player's in-game check; this slice
+passes build/static checks, with ore generation and restart validation manual.
+
+The local `1.0.1.54-beta.1` slice ports Star Fissures. Its footprint matches
+1.21.1 exactly (including Legacy attribution); carving uses the dimension's
+minimum Y, clears fluids, and protects Cave terrain's roof. The authored flag
+is optional in the existing feature-plan codec. Duplicate pages retain the
+1.21.1 single-fissure result; all terrains are accepted, with no material
+modifier. Random feature selection is not introduced in this slice.
+
+First arrival generates the fissure and stores its spawn/completion in per-Age
+SavedData. Re-entry/restart does not repeat carving; an obstructed saved arrival
+is rechecked for safe footing. The return block ports modern entity-inside and
+TeleportTransition APIs, has a registered Rivencraft block-entity type, and
+uses Minecraft's starfield renderer with 1.21.1 face offsets. Shared Overworld
+spawn safety search and fallback match 1.21.1, rather than respawning at a bed.
+The existing fissure OGG/model are reused. Client renderer registration stays
+client-only; the block has no item/drop and is inert in the Overworld.
+
+Dense Ores passed the player's in-game check. Build, footprint comparison,
+resource packaging, and static checks pass for this slice. Generation, visual
+rendering, actual return travel, and restart checks are left to the player;
+no development server is started.
+
 ## Verification of this first slice
 
 The 1.21.1 `compileJava` and `build` tasks passed offline after the backend
@@ -530,3 +689,6 @@ extraction. The GameTest server ran 93 tests; 92 passed, while
 desks instead of one. That desk failure is outside the dimension-backend edit
 and must be resolved or rechecked before a release. The 1.21.1 `build` task
 passed again after the 26.3 registry slice.
+On 2026-11-01, the default 1.21.1 GameTest server was rerun and all 93
+required tests passed, including the desk test. Issue #97 was then closed;
+remaining 26.3 parity work stays under #98–#104.