# Agent log

What agents have done, newest first. Add an entry for every piece of work: the date, which
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.

## 2026-10-23: build menu hover popup, top-left card hidden while building (Claude Code, with Codex)

Notes: "mouse hover reviels a new info popup…" and "dont need the short description in the build
menu…". The owner chose to hide the top-left card entirely while building.

- `src/ui/build-menu.js`: `#bb-pop` above the hovered tile (icon, name, cost, size, power, full
  description, how to place, filter help, build keys), clamped to the window; on a gamepad it
  shows for the selected tile. The `.bb-tip` row became `.bb-status`: variant (material,
  direction, filter) chips, Replace · Ctrl, ghosts waiting, and status messages. The bar now
  updates its parts separately so hovering doesn't rebuild the tiles.
- `src/ui/selection.js`: `#selcard` is hidden for the build tool unless copying, cutting or
  pasting; the build branch moved to the bar. `src/styles/style.css`: popup and status styles;
  on narrow screens the bottom-right panel moves up while building.
- `src/ui/notebook.js`, `docs/DESIGN.md`, `docs/PROJECT_MAP.md`.
- Tests: `play.py` 118 checks (popup on hover, switching tiles, hidden on leave, gamepad,
  no `.bb-tip`, card hidden while building and back for tools 1 and 2, status in the bar; the
  Ctrl replace check now reads the bar). All 11 headless suites pass. `t_smooth.py`'s
  half-resolution check is still flaky under load (~4.8): 1 pass in 3 runs, as before.
- Screenshots in `shots/` (build-popup-*) at 1280×800 and 900×700 in both looks.
- Open: at 900px wide the bottom-left hover-info panel sits partly under the build bar.

## 2026-10-23: a backed-up heap on a belt no longer shears (Claude Code, with Codex)

Note: "belts with a big pile on top only move the grains on the top of the stack…". The owner's
setup: a belt ending in a screw tube going up; material mixed into the bottom layers never moved.

- Cause: `carryColumn` (`src/sim/conveyors.js`) skipped a blocked grain and carried on up the
  column, so with the front backed up the top slid over a stuck bottom. Reproduced headlessly
  first: over 4,000 ticks, 8,815 shear steps at the tube (1,415 against a wall) and only 57 of
  192 bottom sand grains left the belt.
- Fix: on a belt, the walk stops at the first blocked powder grain, so the load above stands
  still. On a filter the walk goes on only so chosen materials can still drop through; nothing
  above a blocked grain is carried. After: no shear, 119 of 192 sand grains out through the tube.
- `test/t_conveyors.js`: 3 new checks (no shear into an up tube, none against a wall, bottom
  layer leaves through the tube). `tools/scenes/belt-heap.js` sets up the owner's case for
  `tools/shot.py`; shots at 30 and 900 ticks look right. `docs/DESIGN.md`, `docs/PROJECT_MAP.md`.
- Tests: all 11 headless suites and `play.py` (109) pass. `t_smooth.py` failed its
  half-resolution check once at load 6.5 and passed on the rerun.
- Open: `t_smooth.py`'s half-resolution check is flaky on a busy machine (the game drops to
  pixel when frames are slow). It is worth making that test immune to the slow fallback.

## 2026-10-23: ingots drop out of the bottom of the mold (Claude Code, with Codex)

Note: "copper bars go into the furnace. also they shouldnt require the player to press F…".
The owner confirmed the first part was a bug: the knock-out threw bars up into the furnace.

- `src/sim/molds.js`: `ejectIngot` runs from `checkMolds` (every 15 ticks). Bars spawn directly
  under the mold, only where `entFreeAt` says there is room; the rest wait in the trough. Metal
  is taken from the top so the short stub stays on the floor. `ingot_drop` and `ingot_blocked`
  events (blocked is said once per spell via `mo.blockedSaid`, not saved). F on a ready ingot
  never launches bars upward; F on an empty, short or spoiled mold still cleans and rakes.
- `src/ui/events.js`: first drop gets a card, later drops a toast; blocked gets a toast. Ingots
  no longer emit `cast_ready`.
- Text: `pieces.js`, `progress.js`, `notebook.js`, `info.js`, `docs/DESIGN.md` (with the
  decision), `docs/systems/stone-and-liquids.md`, `docs/PROJECT_MAP.md`.
- Tests: `t_molds` (38 checks: downward drops, stub kept, top-up, blocked and warned once,
  partial drops, full entity pool, slag), `t_basics`, `t_stone`, `furnace_play.js` and
  `play.py` section 6 changed to the new behaviour. All 11 headless suites, `play.py` (109) and
  `t_smooth.py` (8) pass. A shot of a mold with a belt one block below shows the bars riding off.
- Open: a belt touching the mold's underside counts as blocked; bars need one open block. The
  owner may want a belt directly under the mold to work.

## 2026-10-23: Shift+Q/E build tabs, G pick key removed (Claude Code, with Codex)

Notes: "add shift + q/e to move tabs" and "having the "g pick" there is confusing".

- `src/ui/build-menu.js`: `selectBuildCat(c)` (shared with tab clicks) and `cycleBuildCat(d)`;
  the menu hint now reads Q/E cycle · Shift+Q/E tab.
- `src/ui/input.js`: Shift+Q/E switch tabs with the build tool; G is unbound.
- Text: build card (`selection.js`), notebook controls (`notebook.js`), `actions.js` comment,
  `docs/DESIGN.md`, `docs/PROJECT_MAP.md` (regenerated, `--check` passes).
- `test/play.py`: checks for Shift+Q/E, wrapping, the remembered piece per tab, plain Q/E,
  and that G no longer calls pick while middle mouse still does (109 checks).
- Tests: all 11 headless suites and `play.py` pass; a `tools/shot.py` shot of the Moving tab
  shows the new hint. `t_smooth.py` passes, but its "half-resolution smooth still draws" check
  failed on several runs with the 'slow' pixel fallback while the machine was busy (load ~14).
  The previous commit fails the same way under the same load, so this change didn't cause it.
- Open: that check is timing-sensitive on a loaded machine; rerun it when the machine is idle.

## 2026-10-23: browser tests run locally (Claude Code, with Codex)

Request: get the browser tests, Playwright and Chromium working on the owner's Arch machine
(Python 3.14 refuses a system-wide pip install).

- Playwright 1.64.1 and its Chromium 156 (revision 1248) are in an in-repo `.venv/` made with uv.

- Added `tools/use_venv.py` and called it before Playwright imports in `tools/shot.py`,
  `tools/perf.py`, `tools/playthrough.py`, `test/play.py` and `test/t_smooth.py`.
  The `sys.prefix` guard prevents an exec loop if the venv lacks Playwright.
- Updated `requirements.txt`, `.gitignore`, `README.md`, `AGENTS.md`, `docs/TESTING.md`
  and `docs/PROJECT_MAP.md` for Playwright 1.64.1 and venv setup.
- Checks: regenerated the project map and ran `tools/map.py --check`.
- Tests run with plain `python3`: `test/run_all.py --browser` all passed (11 headless suites,
  `play.py` 101 checks, `t_smooth.py` 8 checks) on the newer Chromium; `tools/shot.py` shots
  of the stone-uses scene look right in both looks. With `.venv` moved away, `play.py` exits
  with the setup message instead of a traceback.
- Open: nothing.

## 2026-10-23: export from claude.ai to a local repository (Claude, in claude.ai)

Request: split the source into small files, deduplicate and tidy a little, test fully, and
write the notes, docs and agent instructions for local development.

- **Source split.**
  - `core.js` (3,688 lines), `main.js` (2,012) and `render.js` (938) became 52 files in
    `src/sim/`, `src/render/` and `src/ui/`, each with a header line. The build order lives in
    `src/manifest.json`.
  - Checked that the joined code was identical to before, apart from comments and blank lines.
  - Every headless suite gave the same output, line for line, before and after.
  - Screenshots of two scenes, in both looks, were pixel-identical before and after
    (`tools/shot.py --freeze`).
- **Tidying, behaviour unchanged.**
  - One scan loop in `simMove` instead of two mirrored copies.
  - A `drawHazardRims` helper replaced 3 copies.
  - The belt and filter shader code shares `beltLineSD`, `bandRidge` and `bandColor`.
  - Removed unused `refundCost`, `wakeArea`, `brushFor`, and the `PARTS` / `PART_BY_ID` aliases.
  - The suites share `suite()` (check / done) from the harness, and failures now set the exit
    code.
- **Tests.**
  - Six broken old scripts were deleted; they used functions removed long ago.
  - Experiments and reports moved to `tools/experiments/`.
  - `t_v2` / `t_v4` / `t_v9` were renamed `t_basics` / `t_world` / `t_conveyors`.
  - Added `test/run_all.py`.
- **Tools.**
  - `tools/shot.py`: repeatable screenshots of a scene set up in JavaScript.
  - `tools/where.py`: maps built-page line numbers back to source files.
  - `tools/map.py`: the project map's index.
  - `tools/scenes/`: example scenes.
  - The game skips cursor previews when `GAME.hidePreviews` is set, for clean screenshots.
- **World files outside claude.ai.**
  - Pause → Export world file only worked inside claude.ai, through its downloads hook.
  - It now falls back to an ordinary browser download (`exportWorld` in `src/ui/saves.js`).
  - `test/play.py` checks that an exported file downloads and imports back on the title screen
    as the same world.
- **Build.** `build.py` writes `dist/index.html` (a full page), `dist/deepgrain-foundry.html`
  (the same without the document wrapper, as the claude.ai artifact used) and
  `dist/bundle-lines.json`.
- **Docs.** `AGENTS.md`, `CLAUDE.md`, `README.md`, `NOTES.md`, `docs/PROJECT_MAP.md`,
  `docs/DESIGN.md`, `docs/TESTING.md`, `docs/systems/*`, `docs/history/requests.md`.
- **Tests run.** All 11 headless suites pass, as do `test/play.py` (101 checks) and
  `test/t_smooth.py` (8 checks).
- **Open.**
  - The owner reports that big piles on belts still only move at the top (NOTES.md); not yet
    reproduced.
  - The game's last claude.ai artifact was version 24.