Extend Legacy instability parity and accelerated ages

docs/LIVE_BLOCK_INSTABILITY.md

@@ -1,4 +1,4 @@
-# Live block-instability profiling (0.5.8.11)
+# Live block-instability profiling (0.5.8.11–0.5.8.15)
 
 Mystcraft Legacy measures the abundance of watched blocks in generated chunks,
 compares that abundance with a baseline, and adds only positive excess to the
@@ -9,8 +9,11 @@ blocks include coal, lapis, iron, emerald, redstone, gold and diamond ores,
 quartz ore, glowstone, and crystal blocks. Diamond **blocks** are not on that
 default list, but are included here at the player's request.
 
-Rivencraft samples up to 1,024 distinct, newly generated chunks per dimension,
-at most four per server tick. It never generates a chunk merely to profile it.
+Rivencraft samples up to 1,024 distinct loaded chunks per dimension,
+at most four per server tick. While a player is in an Age, it also gradually
+generates unsampled chunks around that Age's spawn and the Overworld spawn,
+at most one chunk per second across both dimensions, until their minimum
+sample counts are reached.
 The Overworld is sampled as the baseline; an Age needs 401 samples and the
 baseline needs 500 before the live block component contributes points. Counts and sampled chunk
 positions persist per dimension, preventing reloads from double-counting.
@@ -42,10 +45,10 @@ map and two factors per block, actively builds a dummy-world baseline, and can
 recompute after subsequent chunk profiling. Rivencraft uses a simpler
 per-chunk abundance metric, a real-world Overworld baseline, a sample/work cap,
 and a saved authored base so modern servers remain bounded and restart-safe.
-The greater-than-400-chunk activation delay is retained. Because only newly
-generated chunks are sampled, old already-explored worlds may need substantial
-new exploration before their Overworld baseline is ready. A mod that mutates
-blocks after the chunk-load event may not be reflected in the first sample.
+The greater-than-400-chunk activation delay is retained. Already-explored
+chunks count when reloaded, but the bounded spawn-area pass can generate
+additional terrain. A mod that mutates blocks after the chunk-load event may
+not be reflected in the first sample.
 
 ## Manual check handed to the player
 
@@ -70,4 +73,4 @@ Do not retry that stalled scenario automatically. In a disposable world:
    chunk loading noticeably stall, and report any exception or server hang.
 
 Do not use a valued save for this check. The game jar builds, but live chunk
-profiling still needs this player-run validation before release.
+profiling still needs this player-run validation before issue #73 is closed.