New claims: open another claim once one is paid off, travel between them (t3)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/DESIGN.md

@@ -232,6 +232,22 @@ above, including:
   Items piling up under a block stay a thing to build around (a belt or an open drop), and the
   Saw's text says so.
 
+- **A world that lasts: deep ore, rock that pays, Huge worlds, new claims (t3, 2026-10-24).**
+  The owner found worlds small and quickly mined out, so the only way on was a new game. Keep the
+  bot and drill at today's pace and add more to find instead:
+  - Deeper is richer: ore gets more common the deeper you dig, about 4.7x the ore in a Medium
+    world (coal and copper ~5x, iron, zinc and tin ~4.5-5x, silver and gold ~3.4x, kept lower for
+    their price). The top quarter of the underground is unchanged; copper also forms in deep stone
+    and granite, coal in basalt, tin deeper. Lenses grow from lower noise thresholds only:
+    stretching the noise with depth sheared it into diagonal streaks.
+  - Waste rock pays: grinding granite and basalt finds about twice the ore, and builders order
+    granite and basalt rubble in bulk.
+  - A Huge size (6144 x 2048); saves are gzip-compressed (a Medium save went from 29 MB to 0.4 MB).
+  - New claims: once a claim is paid off, open another for $5,000 down and twice the last debt
+    ($40,000, $80,000, ...). Money, bag, upgrades, discoveries, milestones and stats belong to the
+    career and come along; buildings stay on their claim and wait (they don't run) until you
+    travel back from the notebook's Claims page.
+
 - **Clay bricks come from a Brick press (t28, 2026-10-24).** A hopper block like the Saw: every
   8 clay lumps on top become a Green brick below, and a Green brick fires into a Brick above about
   900°C (any fire). 2 Bricks build a brick wall block; builders order them. The owner found it odd

docs/PROJECT_MAP.md

@@ -376,21 +376,26 @@ The title screen art.
 - functions: buildTitleCells, drawTitle
 - variables: FONT5, TITLE
 
-### src/ui/saves.js (201 lines)
+### src/ui/saves.js (212 lines)
 Saves in IndexedDB, world files (export / import) and the blueprint library.
 - functions: newWorldId, worldWrite, listWorlds, putWorldEntry, worldNewest, deleteWorld, cleanWorldName, renameWorld, migrateWorlds, saveWorld, newestSave, b64FromBytes, bytesFromB64, gz, packBuffers, unpackBuffers, exportWorld, importWorldFile, libLoad, libSave, bpEncode, bpValid, bpDecode
 - variables: DB, worldIdTime, worldIdCounter, worldWrites
 
-### src/ui/session.js (125 lines)
+### src/ui/claims.js (115 lines)
+Shared player state; the world save remains a complete standalone fallback.
+- functions: careerState, validCareer, applyCareerState, loadCareer, openNewClaim, travel, renderClaimsTab
+- variables: career, claimBusy
+
+### src/ui/session.js (133 lines)
 Starting, loading and quitting a game; modal dialogs; the pause menu.
-- functions: showLoading, enterGame, startNewWorld, startFromSave, quitToTitle, refreshContinue, anyModal, openModal, closeModal, closeAllModals, topModal, dialog, openPause, renderWorlds
+- functions: showLoading, enterGame, setupNewWorld, startNewWorld, startFromSave, quitToTitle, refreshContinue, anyModal, openModal, closeModal, closeAllModals, topModal, dialog, openPause, renderWorlds
 
 ### src/ui/settings.js (124 lines)
 The settings screen.
 - functions: openSettings, renderSettings, applySettings, toggleFullscreen, confirmWipe
 - variables: SET_TABS, setTab
 
-### src/ui/notebook.js (202 lines)
+### src/ui/notebook.js (204 lines)
 The notebook (N): milestones, market, wallet, blueprints, controls.
 - functions: openNotebook, renderNotebook, fmtClock, orderName, orderLeft, renderMarketTab, fmtPrice, itemsText, renderWallet, renderBlueprintTab, copyCode, controlsHtml
 - variables: nbTab, MARKET_GROUPS

docs/agent-log.md

@@ -4,6 +4,24 @@ What agents have done, newest first. Add an entry for every piece of work: the d
 note or request it was for, what changed, the files touched, the tests run, and anything left
 open or not verified. Keep each entry short; the git history has the details.
 
+## 2026-10-24: t3: a world that lasts (Claude Code, Codex)
+
+- `26d17c2` deeper is richer (`worldgen.js` ore thresholds drop with depth below fy 0.25).
+  Medium seed 424242 ore grains before -> after: coal 33,493 -> 170,437; copper 26,508 ->
+  127,298; iron 77,679 -> 361,683; zinc 11,797 -> 53,527; tin 7,723 -> 38,551; silver 3,638 ->
+  12,166; gold 1,681 -> 5,858; total 162,519 -> 769,520 (4.73x). Shallow ore unchanged. Codex's
+  first try stretched noise by depth (streaks) and gave gold 26x; redone.
+- `4a88254` waste rock: `REFINE` granite/basalt about 2x; granite and basalt bulk orders; prices.
+- `56c93ae` Huge 6144x2048 and gzip-packed save buffers (`packBuffers`/`unpackBuffers`, old raw
+  saves still load). Medium 29.0 MB -> 0.44 MB, Huge 92.8 MB -> 1.36 MB; Huge generation 5.9 s,
+  save 0.5 s, 0.39 ms per idle tick.
+- New claims: `src/ui/claims.js` (career record `career:<id>` in IndexedDB, applied over each
+  loaded claim; `openNewClaim`, `travel`, Claims tab), `session.js` `setupNewWorld`, `saves.js`.
+  I switched claims.js to the repo's single quotes. Screenshot `shots/t3-claims.png`.
+- Tests: play.py 268 checks and all headless suites pass. t_smooth's half-resolution check
+  fails under load on this machine; the build before t3 failed it 3 of 3 times under the same
+  load, so it isn't caused by this work.
+
 ## 2026-10-24: t4 follow-ups and t28 Brick press (Claude Code, Codex)
 
 - `9739ca0`: Refiner and Stone cutter code removed; `save.js` skips unknown machine types on load