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Qwen3-8B solves Opus Magnum gen046 seed01 under RLM harness (5 turns, BF16 self-hosted vLLM)

Qwen3-8B Opus Magnum trajectory — full, nothing elided

  • Task: eval_fixed_instructions_only_board_cheatsheet_v2_slim__gen046__seed01
  • Model: Qwen3-8B (self-hosted Modal vLLM H100, BF16)
  • Harness: RLM (Python REPL, one run_python tool, submit(arm_programs) to commit)
  • Reward (sum-scores): 0.376 — valid solution produced 6/6 outputs
  • Turns: 5

======================================================================

SYSTEM PROMPT (2117 chars)

====================================================================== You are an engineering agent solving an Opus Magnum puzzle inside a sandboxed Python REPL. Your only action channel is a single fenced ```python block per turn. The code executes in a persistent namespace — variables assigned in turn N are visible in turn N+1. Use print(...) every turn; stdout is the ONLY feedback channel back to you.

Workflow (mirrors the standard Opus-Magnum-bench loop)

  1. Read the inlined puzzle state and the inlined starter solution.py source. Understand what's placed where and which arms exist.
  2. Mentally design arm programs that take reagent atoms through glyphs to the output station.
  3. Build arm_programs as a dict {arm_number: [(command, cycle), ...]} incrementally. The persistent namespace lets you keep per-arm lists between turns (e.g. arm_1_prog = [...], tweak, submit({1: arm_1_prog, 2: arm_2_prog})).
  4. Call safe_verify(arm_programs) to test. Read the returned dict's error field.
  5. On failure, call explain_failure(arm_programs) or motion_preview(arm_programs, cycles=30) for a focused diagnostic. Fix the specific program that broke.
  6. When safe_verify returns solved=True, call submit(arm_programs) to commit and end the episode.

Critical constraints

  • You CANNOT add, remove, or replace parts. No add_armN / add_bonder etc. are callable from the REPL. The parts in the inlined starter are all you have.
  • arm_programs keys MUST be a subset of arm_numbers. Foreign keys (3, 6, etc. when arm_numbers == [1, 2]) are rejected.
  • Cycle indices within one arm's list MUST be unique and strictly increasing. See the PROGRAM ARMS section in the task body for details.
  • Each arm has a kind shown in the starter layout (arm1/arm2/arm3/arm6/piston). extend/retract are only valid on arm6 / piston. track_plus/track_minus only on track-mounted arms.
  • Failed submits return the verifier dict and DO NOT end the episode — you can keep iterating.

Reward

Binary on solved=True. Do NOT optimize cycles/cost/area — any solved solution is worth the same as any other solved solution. Keep iterating until solved=True.

INITIAL USER MESSAGE (24266 chars)

======================================================================

REPL state (already loaded — inspect via Python, not bash)

  • puzzle — opus_magnum_bench.Puzzle parsed from the puzzle file.
  • board — starter Board with every part pre-placed (Board.from_builder).
  • arm_numbers: list[int] — the arm_number ints you use as keys in submit().
  • starter_solution_py: str — full source of the starter solution.py.
  • safe_verify(arm_programs){solved, valid, error, ...}. Test before committing; does NOT end the episode.
  • submit(arm_programs) — commits + writes /workspace/solution.solution. ONLY ends the episode on solved=True; unsolved submits let you iterate.
  • explain_failure(arm_programs), motion_preview(arm_programs, cycles=30), layout_check(arm_programs) — debug helpers.
  • trace_solution(puzzle, builder, cycle_limit=30) — raw per-cycle frames.
  • read(path) → read a file from /workspace or opus_magnum_bench source.
  • describe_arm_program(prog), hex_add, hex_sub, hex_distance, hex_neighbors, arm_positions_for_target, check_placement_overlaps.
  • omb — the full opus_magnum_bench module (escape hatch).

Persistent namespace tip: variables you assign persist across turns. Build incrementally — e.g. keep arm_1_prog = [...] and arm_2_prog = [...] between turns, tweak one, re-call submit({1: arm_1_prog, 2: arm_2_prog}).

PROGRAM ARMS (read carefully)

Every integer in an arm's program is a cycle index — the exact simulation cycle when that instruction fires. Within ONE arm's program, cycle indices must be UNIQUE and STRICTLY INCREASING. They are NOT iteration counts, NOT repeat counts, and NOT offsets. Different arms may share the same cycle index (they fire in parallel).

In dict-submission form:

# Correct — arm 1 fires at cycles 0, 1, 2, then repeats starting cycle 3:
arm_programs = {1: [("grab", 0), ("rotate_cw", 1), ("drop", 2), ("repeat", 3)]}

# Wrong — "two instructions that have the same index":
arm_programs = {1: [("grab", 1), ("rotate_cw", 1), ("drop", 1)]}

# Wrong — three rotations at cycle 1 collapse to one. Use 1, 2, 3:
arm_programs = {1: [("rotate_cw", 1), ("rotate_cw", 1), ("rotate_cw", 1)]}

Commands: grab, drop, rotate_cw, rotate_ccw, pivot_cw, pivot_ccw, extend, retract, track_plus, track_minus, repeat, reset, noop.

Two parallel arms example (dict keys are arm_number ints):

arm_programs = {
    1: [("grab", 0), ("rotate_cw", 1), ("drop", 2)],
    2: [("grab", 0), ("rotate_ccw", 1), ("drop", 2)],
}

DEBUGGING

  • safe_verify(arm_programs) — returns {solved, valid, error, ...} dict. Use before committing. valid=False means the program itself is malformed (e.g. same-cycle-index); valid=True, solved=False means it ran but didn't produce the required outputs.
  • explain_failure(arm_programs) — focused post-mortem string. Dispatches on error type (collision / overlap / cycle-limit / missing-product) and prints exact cycle + cell + arm + payload info.
  • motion_preview(arm_programs, cycles=30) — per-cycle snapshot c=NN | arm0 base=... rot=... tip=... holds=[...] | outputs=N/M. Stops one cycle past any collision.
  • layout_check(arm_programs) — static parts + arm-reach check (no simulation).
  • trace_solution(puzzle, builder, cycle_limit=30) — raw per-cycle trace frames for deep debugging. Normally motion_preview is enough.

If safe_verify returns valid:True, solved:False, error:"did not complete within cycle limit", the layout is fine but no product was emitted. Usually you need ("repeat", N) at the end of each arm's program, not a new layout.

Common gotchas

  • Same cycle index used twice within ONE arm's program → verifier returns valid:False, error:"two instructions that have the same index". Use unique strictly-increasing ints.
  • arm_programs key not in arm_numbersValueError: unknown arm_number. Only program the arms listed in arm_numbers.
  • extend/retract on an arm1 / arm2 / arm3"trying to extend/retract a non-piston arm". Check each arm's kind in the starter layout.
  • track_plus/track_minus on an arm not mounted to a track → "trying to move an arm along a track that isn't on a track". If no Track appears in the starter's Glyphs/IO section, don't use track ops.
  • No product emitted → add ("repeat", N) to the program so the simulator loops your choreography until outputs_required is met.
  • Don't forget to print(...) — expressions don't auto-echo in this REPL.

Puzzle state

Puzzle view for GEN046

Produce 6 outputs. Reagents: Reagent 0: 2 atoms (air x1, fire x1) and 1 bond (normal x1).. Products: Product 0: 2 atoms (salt x2) and 1 bond (normal x1).. Available mechanisms: Arm 1, Arm 2, Arm 3, Arm 6, Piston, Track, Bonder, Unbonder, Multi-Bonder, Glyph of Calcification, Disposal, Glyph of Equilibrium.

Puzzle constants

outputs_required: 6
output_scale:     1
production_mode:  false

Reagents

Reagent 0 — Reagent 0: 2 atoms (air x1, fire x1) and 1 bond (normal x1).

  atoms: fire@(0, 0), air@(1, 0)
  bonds: normal (0, 0)-(1, 0)

Products

Product 0 — Product 0: 2 atoms (salt x2) and 1 bond (normal x1).

  atoms: salt@(0, 0), salt@(1, 0)
  bonds: normal (0, 0)-(1, 0)

Starter layout

Starter layout — structured board state

Board — static layout
outputs: 0/6

Arms:
  - arm0, kind=arm1, base=(0, -1), rot=1, len=1, tip=(0, 0)

Glyphs:
  - calcification at (1, -1) rot=0 (idle)
  - calcification at (2, -2) rot=0 (idle)

IO:
  - input#0 at (0, 0) rot=0
  - output_standard#0 at (1, -2) rot=4

Glyph activation cells (atoms at these cells trigger the glyph):

- calcification at (1, -1) rot=0: input_cardinal=(1, -1)
- calcification at (2, -2) rot=0: input_cardinal=(2, -2)

Cells claimed by starter layout (do NOT place new parts here; check_placement_overlaps will flag conflicts):

  (0, -1), (0, 0), (1, -3), (1, -2), (1, -1), (1, 0), (2, -2)

Rotation legend

Axial hex coordinates (u, v). Neighbours of (0, 0) in directions 0..5: rot 0 (E): (+1, 0) rot 3 (W): (-1, 0) rot 1 (NE): ( 0, +1) rot 4 (SW): ( 0, -1) rot 2 (NW): (-1, +1) rot 5 (SE): (+1, -1) CW rotation decrements direction by 1 (mod 6); CCW increments by 1.

Glyph reference (this puzzle only)

Local footprint + activation hexes at position=(0, 0), rotation=0. For other placements, rotate each offset with hex_transform(offset, rotation) and then translate by position.

  • bonder (rot=0): footprint: (1, 0), (0, 0) activation: atom_a=(0, 0), atom_b=(1, 0)
  • unbonder (rot=0): footprint: (1, 0), (0, 0) activation: atom_a=(0, 0), atom_b=(1, 0)
  • multibonder (rot=0): footprint: (1, 0), (0, -1), (-1, 1), (0, 0) activation: center=(0, 0), spoke_a=(1, 0), spoke_b=(0, -1), spoke_c=(-1, 1)
  • calcification (rot=0): footprint: (0, 0) activation: input_cardinal=(0, 0)
  • disposal (rot=0): footprint: (1, 0), (0, 1), (-1, 1), (-1, 0), (0, -1), (1, -1), (0, 0) activation: target=(0, 0)
  • equilibrium (rot=0): footprint: (0, 0) activation: tile=(0, 0)

Starter solution.py (source — the parts already placed for you)

from __future__ import annotations

import argparse
from pathlib import Path

from opus_magnum_bench import empty_solution
from opus_magnum_bench.sdk import om


def build_solution(puzzle_path: str | Path):
    builder = empty_solution(puzzle_path, name='eval_fixed__gen046')

    part_0 = builder.add_part(name=b'input', position=(0, 0), length=1, rotation=0, which_reagent_or_product=0, track_hexes=[], arm_number=0, conduit_id=0, conduit_hexes=[])

    part_1 = builder.add_part(name=b'glyph-calcification', position=(1, -1), length=1, rotation=0, which_reagent_or_product=0, track_hexes=[], arm_number=0, conduit_id=0, conduit_hexes=[])

    part_2 = builder.add_part(name=b'glyph-calcification', position=(2, -2), length=1, rotation=0, which_reagent_or_product=0, track_hexes=[], arm_number=0, conduit_id=0, conduit_hexes=[])

    part_3 = builder.add_part(name=b'out-std', position=(1, -2), length=1, rotation=4, which_reagent_or_product=0, track_hexes=[], arm_number=0, conduit_id=0, conduit_hexes=[])

    arm_0_4 = builder.add_arm1(position=(0, -1), rotation=1, arm_number=0, length=1)

    return builder


def main() -> int:
    parser = argparse.ArgumentParser(description="Rebuild an Opus Magnum solution file from readable Python.")
    parser.add_argument("puzzle", nargs="?", default="puzzle.puzzle")
    parser.add_argument("out", nargs="?", default="solution.solution")
    args = parser.parse_args()
    builder = build_solution(args.puzzle)
    builder.save(args.out)
    return 0


if __name__ == "__main__":
    raise SystemExit(main())

Glyph reference (from wiki/Glyphs.md)

Glyphs

Source: Opus Magnum Wiki

Glyphs are alchemical devices used to transform Elements.

List of Glyphs

Bonding Glyphs

Name Description Cost Area
Glyph of Bonding Create a simple bond between Elements 10 G 2
Glyph of Multi-bonding Create a simple bond between Elements 30 G 4
Glyph of Triplex-bonding Create a triple bond between Fire Elements 20 G 3
Glyph of Unbonding Destroy all bonds (simple and special) between Elements 10 G 2

Transformation Glyphs

Name Description Cost Area
Glyph of Calcification Transform a Cardinal Element into Salt 10 G 1
Glyph of Duplication Transform Salt into a Cardinal Element 20 G 2
Glyph of Projection Use Quicksilver to upgrade a Base Metal 20 G 2
Glyph of Purification Transform two Base Metals into a better one 20 G 3
Glyph of Animusmus Transform two Salts into a Vitae and a Mors Element 20 G 4
Glyph of Disposal Destroy one Element 0 G 7
Glyph of Unification Fuses the four Cardinal Elements (air, earth, fire, water) into a Quintessence Element 20 G 5
Glyph of Dispersion Transform a Quintessence Element into the four Cardinal Elements (air, earth, fire, water) 20 G 5

Special Glyphs

Name Description Cost Area
Glyph of Equilibrium No effect 0 G 1
Conduit Teleport an atom between chambers (Appendix puzzle only) - 1

Disposition

Only one Glyph can occupy a single tile. Glyphs cannot overlap with arm axles, reagents, or tracks.

Glyph Shapes and Mechanisms

The shape of a Glyph determines which set of Mechanisms can interact with it effectively. Each Glyph may include grabbing/dropping tiles (where arms must grip or release an Element) and passing tiles (where Elements only need to pass through or rest).

Shape Glyph Function Tile Mechanism Set Cost Area
Single tile and Pair tiles Calcification One Passing Tile One Fixed-length single arm 20 G 1
Single tile and Pair tiles Bonding / Unbonding / Duplication Two Passing Tiles One Fixed-length single arm 20 G 1
Single tile and Pair tiles Projection One Passing Tile, One Grabbing/Dropping Tile One Fixed-length single arm 20 G 1
Triple axis Multi-bonding Four Passing Tiles One Piston arm 40 G 1
Triangle Purification Three Grabbing/Dropping Tiles One Fixed-length single arm + three Tracks / Two Fixed-length single arms 35 G 2
Triangle Triplex-bonding Three Passing Tiles One Fixed-length single arm 20 G 1
Diamond Animusmus Four Grabbing/Dropping Tiles One Fixed-length single arm + Four Tracks / Two Fixed-length single arms 40 G 2
Hexagonal Disposal One Grabbing/Dropping Tile One Fixed-length single arm 20 G 1
Cross Unification Five Grabbing/Dropping Tiles One Fixed-length single arm + Three Tracks / Two Fixed-length single arms 35 G 2
Bilayer Dispersion Five Grabbing/Dropping Tiles One Fixed-length single arm + Four Tracks / One Piston arm + Two Tracks 40 G 2

SDK cheatsheet

Opus Magnum SDK Cheatsheet

Compact reference for opus_magnum_bench. Import everything from the top-level package:

from opus_magnum_bench import (
    empty_solution, SolutionBuilder, ArmBuilder,
    verify_solution, safe_verify, VerifyResult,
    trace_solution,
    Board, Atom, Arm, Glyph,
    hex_add, hex_sub, hex_dir, hex_neighbors, hex_distance,
    hex_transform, hex_transform_position,
    arm_positions_for_target, arm_grab_pos, arm_payload_positions,
    part_occupied_cells, check_placement_overlaps,
    PART_FOOTPRINTS,
    simulate_glyph, glyph_activation_hexes, glyph_footprint,
    explain_failure, layout_check, motion_preview,
    DEFAULT_CYCLE_LIMIT,
)

Hex coords are axial (u, v). Directions 0..5 (unit offsets from (0, 0)):

rot name offset
0 E (+1, 0)
1 NE ( 0, +1)
2 NW (-1, +1)
3 W (-1, 0)
4 SW ( 0, -1)
5 SE (+1, -1)

rotate_cw decrements rotation by 1 mod 6; rotate_ccw increments by 1.


Minimal end-to-end

b = empty_solution("puzzle.puzzle")
b.add_input(position=(0, 0), which=0, rotation=0)
b.add_output_standard(position=(3, 0), which=0, rotation=0)
arm = b.add_arm1(position=(1, 0), rotation=0, arm_number=0, length=1)
arm.grab(0).rotate_cw(1).drop(2).reset(3)
b.save("solution.solution")

result = verify_solution("puzzle.puzzle", "solution.solution")
print(result.solved, result.cycles, result.cost, result.area)

SolutionBuilder (empty_solution(puzzle, *, name=...))

All add_* methods take keyword-only args.

Arms (return ArmBuilder):

  • add_arm1(*, position, rotation, arm_number, length=1)
  • add_arm2(*, position, rotation, arm_number, length=1)
  • add_arm3(*, position, rotation, arm_number, length=1)
  • add_arm6(*, position, rotation, arm_number, length=1)
  • add_piston(*, position, rotation, arm_number, length=1)

I/O and track:

  • add_input(*, position, which=0, rotation=0)
  • add_output_standard(*, position, which=0, rotation=0)
  • add_output_repeating(*, position, which=0, rotation=0)
  • add_track(*, position, hexes)hexes is a list of (u, v) including position.

Bonders / glyphs:

  • add_bonder, add_unbonder, add_multibonder
  • add_calcification, add_projection
  • All take *, position, rotation=0.

Escape hatch:

  • add_part(*, name, position, length=1, rotation=0, which_reagent_or_product=0, track_hexes=None, arm_number=0, conduit_id=0, conduit_hexes=None)

Serialize:

  • builder.to_bytes() -> bytes
  • builder.save(path) -> Path

Part-name aliases (bytes vs friendly strings)

add_part(name=...) takes the raw bytestring from the solution file format. Everywhere else in the SDK (PART_FOOTPRINTS, part_occupied_cells, check_placement_overlaps, Board.glyphs_of(kind=...), _format_arm) uses the friendly string key. They are not interchangeable — mixing them produces silent lookup misses.

friendly (PART_FOOTPRINTS / PART_SPEC_KEYS) raw (add_part(name=...))
arm1, arm2, arm3, arm6 b'arm1', b'arm2', b'arm3', b'arm6'
piston b'piston'
track b'track'
bonder b'bonder'
unbonder b'unbonder'
multibonder b'bonder-speed'
calcification b'glyph-calcification'
projection b'glyph-projection'
input b'input'
output_standard b'out-std'
output_repeating b'out-rep'

Prefer the typed builders (add_bonder, add_output_standard, …) — they wrap the bytes for you. Only reach for add_part(name=...) when you need the escape hatch.

Re-check which builders are allowed vs forbidden for the current puzzle in puzzle_view.md.


ArmBuilder — program instructions

Each method returns the builder (chainable). cycle is the 0-indexed step when the instruction fires.

  • grab(cycle), drop(cycle)
  • rotate_cw(cycle), rotate_ccw(cycle)
  • extend(cycle), retract(cycle) (piston only)
  • pivot_cw(cycle), pivot_ccw(cycle)
  • track_plus(cycle), track_minus(cycle) (requires a track under the arm base)
  • repeat(cycle), reset(cycle), noop(cycle)
  • program([(opcode, cycle), ...]) — bulk form; opcodes are strings.

Opcodes (strings): rotate_cw, rotate_ccw, extend, retract, grab, drop, pivot_cw, pivot_ccw, track_plus, track_minus, repeat, reset, noop.


Arm instruction reference

Each instruction consumes exactly one tape cycle. Held atoms always move with the arm during rotation/track/extend/retract.

opcode effect notes
grab Start holding atoms on the arm's current grabbers. First half of the cycle.
drop Release everything currently held. First half of the cycle.
rotate_cw Rotate arm clockwise around its base (decrement rotation mod 6). Payload rotates with the arm.
rotate_ccw Rotate arm counter-clockwise around its base (increment rotation mod 6). Payload rotates with the arm.
pivot_cw Rotate held molecule clockwise around the grab point; arm base does not move. Requires the puzzle to allow pivots.
pivot_ccw Rotate held molecule counter-clockwise around the grab point. Requires the puzzle to allow pivots.
extend Piston reach +1 (max 3). Piston only.
retract Piston reach −1 (min 1). Piston only.
track_plus Slide arm one step forward along its track. Arm base must be on a track cell.
track_minus Slide arm one step backward along its track. Arm base must be on a track cell.
repeat Re-emit the tape segment since the previous repeat marker (or tape start). Compact periodic programs.
reset Auto-generate reverse moves to restore the starting pose. Simulator expands this into drop + track/rotation/piston reverse steps.
noop Idle for one cycle. Padding / alignment only.

Verifier

result = verify_solution(puzzle, solution, *, cycle_limit=DEFAULT_CYCLE_LIMIT)
result = safe_verify(puzzle, solution, *, cycle_limit=DEFAULT_CYCLE_LIMIT)

puzzle / solution accept a path, bytes, or object (SolutionBuilder works directly for solution). safe_verify swallows all exceptions except FileNotFoundError and returns a VerifyResult with error set — use it during iterative debugging.

VerifyResult fields:

  • valid: bool — layout legal (no overlap, simulator accepted it).
  • solved: bool — delivered outputs_required products within cycle_limit.
  • reward: float — scoring-profile dependent (passed via scoring_profile= kwarg or --scoring-profile CLI flag; default sum-scores).
  • overlap: int | None — offending overlap count if valid=False.
  • cost, cycles, area: int | None — set only when solved=True.
  • error: str | None, error_cycle: int | None, error_location: (u, v) | None.
  • .to_dict(), .to_json().

Tracing a run

trace = trace_solution(puzzle, solution, *, cycle_limit=50)

Returns a TraceDocument with:

  • trace.summarycycle, complete, collision, outputs, cycle_limit, reason.
  • trace.frames[i] — per-cycle snapshot: cycle, complete, collision, outputs, atoms, arms, collision_reason, collision_position.
  • frame.atoms[j]u, v, atom_type, normal_bonds, grabbed, van_berlo, .position.
  • frame.arms[j]base_u, base_v, rotation, grabbing, kind, .base.

For most debugging, use the Board API below (Board.from_trace(trace, cycle)) rather than raw frames. For frame.collision / frame.outputs scanning, iterate trace.frames directly. For zooming in on one cycle ▎ — arm tips, held-atom ids, glyph footprints, bond graphs — wrap it with Board.from_trace(trace, cycle).


Board — structured layout / snapshot

Board.from_trace(trace, cycle)                # snapshot at a cycle

Attributes (all precomputed):

  • cycle: int | None, outputs_delivered: int, outputs_required: int
  • runtime_collision: bool, runtime_collision_reason, runtime_collision_position
  • arms: tuple[Arm, ...], glyphs: tuple[Glyph, ...], atoms: tuple[Atom, ...]

Prompt summary:

  • board.describe() -> str — compact text dump of the layout (good for agent context).

Dataclasses

  • Atom: id, position, atom_type, grabbed_by, bonds, van_berlo, on_glyph. Equality is by id.
  • Arm: index, kind, base, rotation, length, tip, tips, grabbing, program.
  • Glyph: kind, position, rotation, footprint, activation_hexes: dict[str, (u, v)].

Spatial / planning helpers

hex_add(a, b)                              # (u, v) + (u, v)
hex_sub(a, b)
hex_dir(direction)                         # unit offset for direction 0..5
hex_neighbors((u, v))                      # all 6
hex_distance(a, b)                         # axial hex distance
hex_transform(offset, rotation)            # rotate a local footprint offset
hex_transform_position(position, offset, rotation)

Arm placement:

arm_grab_pos(base, rotation, length=1) -> (u, v)
arm_positions_for_target(target, *, length=1) -> [(base, rotation), ...]  # 6 entries
arm_payload_positions(base, rotation, payload_offsets, length=1) -> [(u, v), ...]

Overlap (use this first when a solution fails with overlapping placements):

PART_FOOTPRINTS["bonder"]                  # local offsets for each part type
part_occupied_cells(part_type, position, rotation=0) -> [(u, v), ...]
check_placement_overlaps([(part_type, position, rotation), ...])
# -> [] if no overlaps, else [(cell, [part_indices]), ...]

Glyph activation and simulation

glyph_footprint(glyph_type, position=(0,0), rotation=0) -> [(u, v), ...]
glyph_activation_hexes(glyph_type, position=(0,0), rotation=0) -> dict
simulate_glyph(
    glyph_type, glyph_position, glyph_rotation,
    atoms=[{"position": (u, v), "element": "iron", "bonds": [(u2, v2), ...], "grabbed": False, "van_berlo": False}, ...],
)
# -> {"activated": bool, "result_atoms": [...], "explanation": str}

Use this offline to predict whether a candidate atom arrangement will trigger a glyph before running the full verifier.


Constants

  • DEFAULT_CYCLE_LIMIT — passed to verify_solution / trace_solution by default.
  • scoring_profile (kwarg to verify_solution / safe_verify, or --scoring-profile CLI flag on verify_task.py) selects reward formula: sum-scores (cost+cycles+area), sum-cycle-area, solved-binary. Default is sum-scores.

Typical iterative loop

b = empty_solution("puzzle.puzzle")
# ... add parts, program arms ...

result = safe_verify("puzzle.puzzle", b)
if not result.valid:
    # Overlap? static check — no simulation required.
    overlaps = check_placement_overlaps([(kind, pos, rot) for ...])
    # Collision / cycle-limit / missing-products? inspect the trace.
    trace = trace_solution("puzzle.puzzle", b, cycle_limit=30)
    board = Board.from_trace(trace, result.error_cycle or trace.summary.cycle)
    # inspect board around result.error_location

Debug helpers (one-shot CLIs)

Run these from a bash step — no setup, no ad-hoc scripts. Each is also importable (from opus_magnum_bench import explain_failure, layout_check, motion_preview).

# Why did my solution fail? Post-mortem from a VerifyResult — dispatches on
# collision / overlap / cycle-limit / missing-products and prints a focused report.
uv run python -m opus_magnum_bench.explain_failure puzzle.puzzle solution.solution

# Did I overlap any parts? Can each arm reach each output? Static — no simulation.
# Passing the puzzle is optional; if given, arm-reach is reported per output station.
uv run python -m opus_magnum_bench.layout_check solution.solution puzzle.puzzle

# Where are the arms + held atoms cycle-by-cycle? Stops one cycle past any collision.
uv run python -m opus_magnum_bench.motion_preview puzzle.puzzle solution.solution --cycles 30

======================================================================

TURN 1 — AGENT (17115 chars)

====================================================================== Okay, let's tackle this puzzle. The goal is to produce 6 outputs of Product 0, which is two salt atoms and a normal bond. The reagents available are air, fire, and a normal bond. The starter layout has some glyphs and arms. Let me start by understanding the setup.

First, the reagents are at (0,0) and (1,0) with a bond between them. The input is at (0,0), which is where the reagents are. The output is at (1,-2), which is the standard output. The glyphs are calcification at (1,-1) and (2,-2). The arm is arm1 at (0,-1) with rotation 1 and length 1.

The calcification glyph transforms a cardinal element into salt. Since the reagents have fire and air, which are cardinal elements, using calcification should convert them into salt. But each calcification glyph can only take one element, right? So maybe we need to use both glyphs to process the two elements.

Wait, the input has two atoms (air and fire) and a bond. The calcification glyph requires an input_cardinal, which is the position (0,0) for the first glyph. So maybe the arm needs to pick up the fire atom, go to the calcification glyph, process it into salt, then pick up the air atom and do the same. But how to manage that?

But since the input has both atoms, maybe the arm can pick up both. Wait, but the arm can only hold one atom at a time. So the process might involve grabbing one atom, processing it, then grabbing the other. But how to get both into the output?

Alternatively, maybe the calcification glyph can be used twice. Let me think: each calcification glyph can take one atom. So the arm needs to go to each glyph once, process each atom, then combine them. But how to combine them into a bond?

Wait, the product requires two salt atoms and a bond. So maybe after processing both atoms into salt, we need to bond them. But the starter layout doesn't have a bonder glyph. Wait, the available mechanisms include bonder, unbonder, multibonder, etc. But the starter solution's code has added a calcification glyph, but maybe I can add other glyphs?

Wait, the problem says that the starter layout has certain parts already placed. The user can't add or remove parts. So the only glyphs available are the two calcifications. So maybe we can use those to process the two atoms into salt, then use some other mechanism to bond them. But where is the bonder?

Wait, the problem says the available mechanisms include bonder, unbonder, multibonder, etc. But the starter solution's code has parts added, like the input, output, and two calcification glyphs. So maybe there's a bonder in the starter layout? Wait, looking back, the starter solution's code doesn't mention any bonder. So perhaps the user can't add a bonder, but the problem says the available mechanisms include it. Wait, the puzzle's available mechanisms list includes bonder, unbonder, multibonder, etc. So maybe there's a bonder part in the starter layout?

Wait, the starter layout's IO has an input and an output. The glyphs are calcification. The arms are arm1. So maybe the bonder isn't present. Wait, the problem says the starter solution's code has some parts, but maybe the user can add other parts? Wait no, the user can't add or remove parts. The initial board has parts already placed. The user can only program the arms.

Wait, the puzzle says that the available mechanisms include bonder, but perhaps the user can use the existing parts. Wait, the problem's starter layout doesn't have a bonder, but the user can't add one. So maybe the bonding is done via the calcification glyphs? Or perhaps there's a way to bond the two salts using the existing setup.

Alternatively, maybe the two calcification glyphs can be used to process each atom into salt, and then the arm can take both salts and bond them. But how to bond them without a bonder? Hmm. Wait, the product requires a bond, so maybe the bonding is done automatically when the two salts are placed at the output station. Or perhaps the calcification glyph can create a bond?

Wait, the calcification glyph's activation is when an atom is placed on its input_cardinal. So when the arm drops an atom into the calcification glyph, it transforms it into salt. But the product requires a bond between the two salts. So maybe after processing both atoms into salt, the arm needs to carry them to the output and bond them there. But how to bond them?

Alternatively, maybe the problem is designed such that using the two calcification glyphs will create two salts, and then the bond is formed automatically. But I'm not sure. Let me think again.

The reagent has two atoms (air and fire) and a bond. The product requires two salts and a bond. So the bond from the reagent might be used to form the product's bond. But how to get two salts from the reagent's atoms?

Each calcification glyph can transform a cardinal element (air or fire) into salt. So if we can process both atoms into salt, then we have two salts. Then, the existing bond in the reagent could be used to bond them. But how?

Wait, maybe the bond from the reagent is not needed, and the two salts are bonded via the calcification glyphs? Not sure. Maybe the product's bond is formed when the two salts are placed into the output. But I'm not certain.

Alternatively, perhaps the process is: take the fire atom, process it into salt using the first calcification glyph. Then take the air atom, process it into salt using the second calcification glyph. Then, take both salts and bond them using a bonder. But if there's no bonder in the layout, this would be impossible.

Wait, the available mechanisms include a bonder. But the starter layout doesn't have it. So maybe the user is supposed to use the existing parts. Let me check the starter solution code again. The starter solution adds an input, two calcification glyphs, and an output. The arms are arm1. So no bonder. Therefore, the bonding must be handled by other means.

Wait, perhaps the two salts can be bonded by placing them into the output station. The output station is a standard output. Maybe when two atoms are placed into the output, the bond is formed. But I'm not sure how the output works. The output is a standard output, which might just accept atoms and bonds. But the product requires two salts and a bond. So perhaps the bond is part of the product's creation.

Alternatively, maybe the calcification glyphs themselves create bonds. But according to the glyph reference, the calcification glyph transforms a cardinal element into salt, but doesn't create bonds. So the bond in the product must come from somewhere else.

Hmm, maybe the original bond in the reagent is used. So, the reagent has a normal bond between the two atoms. When they are processed into two salts, the bond remains, but it's not clear. Maybe the bond is part of the product.

Alternatively, the product's bond is formed when the two salts are combined. But without a bonder, this is tricky.

Wait, perhaps the problem doesn't require bonding the salts, and the product's bond is just a normal bond. But the product's description says it has a normal bond. So maybe the bond is part of the product's structure.

This is getting complicated. Let's think about the arm's program. The arm is arm1, which is an arm1 type. The arm starts at (0,-1) with rotation 1 and length 1. The tip is at (0,0). The input is at (0,0), which is where the arm's tip is. So the arm can grab the input atoms.

So the plan is: grab the fire and air atoms from the input, process each into salt using the calcification glyphs, then deliver them to the output. But how to deliver both and bond them.

Alternatively, since the output is at (1,-2), which is the standard output, perhaps the arm can deliver each salt to the output, but how to have a bond. Maybe the bond is formed automatically when both are delivered.

But how to process both atoms. Let me outline the steps:

  1. Grab the fire atom from input (0,0).
  2. Move to the calcification glyph at (1,-1) (which is activated at (1,-1)).
  3. Drop the fire atom into the calcification glyph, which converts it to salt.
  4. Grab the salt from the calcification glyph.
  5. Move to the output (1,-2), drop the salt.
  6. Repeat for the air atom: grab, process via the second calcification glyph at (2,-2), then drop at output.

But the problem is that the arm can only hold one atom at a time, so processing both requires two cycles. Also, the output requires 6 products. So each cycle produces one product, and we need six of them. But the initial reagent has two atoms. So maybe we need to repeat the process multiple times.

Wait, the reagents are given as part of the puzzle. The initial input has two atoms and a bond. So maybe the arm can take both atoms, process them into two salts, then deliver both to the output, but that would produce one product. To get six products, we need to repeat the process three times.

But the problem is that the arm can only process one atom at a time. So the process would be: grab fire, process, drop. Grab air, process, drop. Then, the reagent would be empty. But the initial reagent has two atoms. So the arm can process both, producing two salts, which would be two products. Then, how to get more?

Wait, maybe the bond in the reagent is part of the product. But I'm not sure. Alternatively, maybe the bond is not part of the product. But the problem's product requires a bond. So perhaps the bond is created during the processing, but I'm not certain.

Alternatively, maybe the bond is created when two salts are placed into the output. So after processing both atoms into salts, the arm can carry both to the output, and the output would accept them as a product. But how to do that.

Wait, the output is a standard output. Let me check the glyph reference. The standard output is a part that can take atoms and bonds. So when the arm delivers the two salts to the output, the output would accept them as a product. But the product requires two salts and a normal bond. So maybe the bond is part of the output's structure.

Alternatively, perhaps the bond is formed when the two salts are delivered to the output. So, the arm would need to deliver two salts to the output, which forms the product.

But the initial reagent has two atoms and a bond. So processing them into two salts would produce two salts and the original bond. So when the arm delivers both salts to the output, the bond is already present, so that's the product.

Wait, maybe the bond from the reagent is used. For example, when the two atoms are processed into salts, the bond remains. So the product is the two salts and the bond. But how to get that.

This is getting a bit tangled. Let's try to outline the arm's program step by step.

The arm starts at (0,-1), rotation 1, length 1. The tip is at (0,0), which is the input's position. So the arm can grab the input's atoms.

First, grab the fire atom. Then, move the arm to the calcification glyph at (1,-1). Wait, the arm's tip is at (0,0). To reach the calcification glyph at (1,-1), the arm needs to rotate and extend. Let's calculate the steps.

The arm is initially at (0,-1), rotation 1 (which is NE direction). So the tip is at (0,0). To reach the glyph at (1,-1), which is adjacent, the arm might need to rotate clockwise or counter-clockwise. Let's see.

The arm's rotation is 1 (NE). To reach (1,-1), which is the cell directly to the south-east (since rotation 1 is NE, but maybe the arm needs to rotate to face south-east? Wait, the rotation directions are based on the hex grid. Let me think about the positions.

The arm's initial base is at (0,-1), rotation 1 (NE). The tip is at (0,0). To reach the calcification glyph at (1,-1), which is one hex in the direction of rotation 3 (W) from the base? Or maybe I need to calculate the positions.

Alternatively, maybe the arm needs to rotate clockwise to face the correct direction. For example, rotating clockwise (decrement rotation by 1 mod 6) would take rotation 1 (NE) to 0 (E), which is east direction. Then, the tip would be at (1, -1), which is where the calcification glyph is located. Wait, the glyph is at (1,-1), which is directly east of the base (0,-1). So if the arm is at (0,-1) with rotation 0 (E), its tip is at (1,-1), which is the position of the calcification glyph. So the arm needs to rotate clockwise once (from rotation 1 to 0) to face east.

So the steps would be:

  • Grab the fire atom at (0,0) (which is the input position).
  • Rotate clockwise to face east (rotation 0).
  • Extend the arm if needed (but the arm's length is 1, so maybe it's already at the right position).
  • Drop the fire atom into the calcification glyph at (1,-1). Wait, but the calcification glyph's activation is on the input_cardinal at (1,-1), which is the position of the glyph. So when the arm drops the atom at (1,-1), the glyph is activated.

But the arm's tip is at (1,-1) after rotating. So when the arm drops the atom, it would be at (1,-1), which is the activation position. So the glyph would process it into salt.

Then, the arm needs to grab the salt from the glyph. Wait, but the glyph's activation is when an atom is placed on it. Once processed, the glyph would have the salt. But how does the arm pick it up? The arm needs to grab it from the glyph's position.

Wait, maybe after dropping the fire atom into the glyph, the glyph produces a salt atom, which is then available for the arm to grab. But I'm not sure how the glyph's activation works. The simulate_glyph function might help here.

Assuming that when an atom is placed on the glyph's activation hex, it's transformed into salt. So the process would be:

  1. Arm grabs fire atom from input.
  2. Arm moves to the calcification glyph's position (1,-1).
  3. Arm drops the fire atom there, which activates the glyph and converts it into salt.
  4. Then, the arm can grab the salt from the same position (since the glyph's footprint is (0,0), so the activation is on (1,-1) for the glyph at (1,-1) with rotation 0. Wait, the glyph's footprint is (0,0), so the activation is at (1,-1) (the position of the glyph). Wait, no. The glyph's position is (1,-1), rotation 0. The activation hex is input_cardinal=(1,-1). So when the arm drops an atom at (1,-1), it's placed on the activation hex, which triggers the glyph. The glyph then transforms the atom into salt. The salt would be at the same position, or where?

Assuming that the glyph's footprint is just the position (1,-1) (since it's a single tile), then after activation, the atom is transformed into salt, which is still at (1,-1). So the arm can then grab it from there.

So the steps would be:

  • Grab fire atom.
  • Rotate to face east (rotation 0).
  • Drop fire at (1,-1), which activates the glyph, converting it into salt.
  • Grab the salt from (1,-1).
  • Move to the output at (1,-2), drop the salt.
  • Repeat for air atom: grab, process via second calcification glyph at (2,-2), drop.

But how to move the arm to (2,-2) for the second glyph? Let's see. After dropping the first salt at (1,-2), the arm needs to go to (2,-2). Let's see the path.

The output is at (1,-2). The second calcification glyph is at (2,-2). So the arm needs to rotate to face south (direction 4?), then move.

Alternatively, maybe after dropping the first salt, the arm can rotate to face south to reach (2,-2). But I need to calculate the steps.

This is getting a bit complicated. Let's think about the arm's program. The arm can have a sequence of steps. For example:

Grab the fire atom, rotate to face east, drop, grab the salt, move to output, drop. Then, grab the air atom, rotate to face south, drop, grab salt, move to output, drop. But how to get the arm to the correct positions.

Alternatively, the arm can be programmed to loop this process. But since the arm has to repeat, the program would need a 'repeat' command.

But the initial arm program is empty, so the user has to build it. Let's outline the steps for one product.

First, the arm starts at (0,-1) with rotation 1. The input is at (0,0). So the arm can grab the input's atoms. Let's assume that the arm can pick up both atoms, but since the arm can only hold one at a time, it must do them sequentially.

But the input has two atoms: fire at (0,0) and air at (1,0). Wait, the reagent's atoms are fire@(0,0), air@(1,0), and a bond between them. So the arm can grab either one, but not both. So the process would be:

Grab the fire atom from (0,0), process it via the first calcification glyph at (1,-1), then grab the air atom from (1,0), process via the second calcification glyph at (2,-2), then deliver both to the output. But the output is a standard output that accepts atoms.

But how to get both salts to the output. The output is at (1,-2). So after processing both atoms, the arm needs to carry each salt to the output. That would require two cycles, but the product requires two salts and a bond. So each cycle produces one product. Wait, but the output requires 6 products. So the process needs to be repeated 6 times, but the initial reagent has only two atoms. So maybe the problem allows for using the same atoms multiple times, but that's


TURN 1 — REPL OBSERVATION (101 chars)


ERROR: no ```python fenced code block found in your response. Emit exactly one python block per turn.

======================================================================

TURN 2 — AGENT (9935 chars)

====================================================================== Okay, let's try to figure out the arm program step by step. The goal is to produce 6 outputs of Product 0, which requires two salt atoms and a normal bond. The initial reagents are fire and air at positions (0,0) and (1,0), connected by a bond. The available glyphs are two calcification glyphs at (1,-1) and (2,-2). The output is at (1,-2).

First, the arm starts at (0,-1) with rotation 1 (NE), length 1. The tip is at (0,0), which is the input's position. The arm needs to grab one of the reagents. Let's start with the fire atom at (0,0).

Step 1: Grab the fire atom. Since the arm is already at (0,0), the 'grab' command at cycle 0 should pick it up.

Next, the arm needs to move to the calcification glyph at (1,-1). To do that, the arm must rotate clockwise (rotate_cw) to face east (rotation 0). This would move the tip to (1,-1) where the glyph is. So rotate_cw at cycle 1. Then, drop the fire atom at cycle 2. This should activate the calcification glyph, converting the fire into salt.

After dropping, the arm needs to grab the salt. But the salt is now at (1,-1), so the arm should move to that position. Wait, the arm is already at (1,-1) after rotating. So the arm can grab the salt at cycle 3. Then, the arm needs to move to the output at (1,-2). To do that, the arm can rotate clockwise again (from rotation 0 to 1?), but I need to check the rotation directions. Alternatively, the arm can pivot or extend. Wait, the output is directly south of the current position (1,-1) to (1,-2). So the arm can just move down by extending or rotating.

Wait, the arm's length is 1, so it can't extend further. But the output is at (1,-2), which is one hex south. The arm's current position is (1,-1), so to reach (1,-2), the arm needs to rotate to face south (direction 4). The current rotation is 0 (east). Rotating clockwise (rotating_cw) from 0 to 5 (south), then rotating again to 4 (south). Wait, rotating clockwise steps: rotation 0 (east) → 5 (south), then 4 (southwest?), no. Wait, the hex directions are:

Rotation 0: E (east) Rotation 1: NE Rotation 2: NW Rotation 3: W Rotation 4: SW Rotation 5: SE

Wait, the rotation direction is such that rotating clockwise (CW) decreases the rotation number by 1 mod 6. So rotating from 0 (east) to 5 (SE), then to 4 (southwest?), but I'm getting confused. Alternatively, the arm's position is at (1,-1), and the output is at (1,-2), which is directly south. To face south, the arm's rotation should be 4 (SW) or 5 (SE)? Let me check the hex directions again.

The hex direction for south is rotation 4 (SW), which is (0, -1). So to face south, the arm needs to be at rotation 4. The current rotation after the first rotate_cw (from 1 to 0) is 0 (east). To face south, the arm needs to rotate clockwise again. Rotating clockwise from 0 (east) → 5 (SE), then 4 (SW). So two rotate_cw steps. So at cycle 4, rotate_cw to 5, then cycle 5 rotate_cw to 4. Then, drop the salt at (1,-2) (output).

But this seems like a lot of steps. Maybe there's a more efficient way. Alternatively, the arm can move directly to the output by rotating to face south and extending. But the arm's length is 1, so it can't extend further. Wait, the arm's length is 1, so the tip is at (1,-1). To reach (1,-2), the arm needs to rotate to face south (direction 4), then extend if possible. But since the arm's length is 1, the maximum is 1. Wait, the arm's length is fixed at 1. So the tip is always at (base_u + direction_u, base_v + direction_v). So if the base is at (1,-1), and the rotation is 4 (south), the tip is at (1,-1) + (0,-1) = (1,-2), which is the output position. So rotating to rotation 4 would position the tip at the output.

So the steps after grabbing the salt would be: rotate to 4 (south) at cycle 3, then drop at cycle 4. Then, the salt is delivered to the output.

Now, the arm needs to go back to the input to grab the air atom. Wait, but the input is at (0,0), which is where the arm started. So after delivering the first salt, the arm needs to return to the input. How? Rotate back to face east (rotation 0) and move back.

But the arm is at (1,-2) (output). To get back to the input at (0,0), the arm would need to rotate to face west, then move back. But this might take multiple steps. However, since the arm is a single arm, it might not be able to return in time for the next cycle.

Alternatively, perhaps the process is repeated for each atom. So after delivering the first salt, the arm would need to grab the air atom, process it via the second calcification glyph, then deliver it. But the second glyph is at (2,-2). So the arm needs to move there.

This is getting complex. Let's try to outline the entire process for one product.

  1. Grab fire atom (cycle 0).
  2. Rotate to east (cycle 1).
  3. Drop fire (cycle 2) → activates calcification, converts to salt.
  4. Grab salt (cycle 3).
  5. Rotate to south (cycle 4).
  6. Drop salt (cycle 5) → output delivered.
  7. Return to input to grab air atom (cycle 6).
  8. Rotate to east (cycle 7) to reach (2,-2) for the second glyph? No, that's not right. Wait, after delivering the first salt, the arm is at (1,-2). To reach the second glyph at (2,-2), the arm needs to rotate to east again (rotation 0) and move.

Wait, the second glyph is at (2,-2). The arm is currently at (1,-2) (output). To reach (2,-2), the arm can rotate to east (rotation 0) and move one step. But the arm's length is 1, so the tip is at (1,-2) + (1,0) = (2,-2). So rotating to east (rotation 0) at (1,-2) would position the tip at (2,-2), which is the position of the second calcification glyph.

So after delivering the first salt, the arm would:

  1. Rotate to east (cycle 6).
  2. Drop the air atom? No, the air atom is at (1,0), not (2,-2). Wait, the air atom is at (1,0). So the arm needs to go back to the input to grab it.

This is getting too complicated. Maybe there's a better way. Perhaps the arm can process both atoms in one cycle. For example, grabbing one, processing, then grabbing the other.

Alternatively, since the arm can only carry one atom at a time, the process would take two cycles per product. But with the output requiring 6 products, we need to repeat this process 6 times. However, the initial reagent has only two atoms, so this approach isn't feasible.

Wait, maybe the bond in the reagent is part of the product. So after processing both atoms into salt, the bond is still there. When both salts are delivered to the output, the bond is part of the product.

So the arm needs to deliver both salts to the output. But how to do that.

Alternatively, the arm can carry both salts to the output in one go, but that would require holding two atoms, which the arm can't.

This seems like a dead end. Maybe the problem is designed to use the two calcification glyphs to process each atom, and the bond is part of the product's structure.

Given the time constraints, perhaps the best approach is to create an arm program that processes each atom into salt, delivers them to the output, and repeats.

The arm program would need to:

  • Grab fire atom, process via first glyph, deliver.
  • Grab air atom, process via second glyph, deliver.
  • Repeat this cycle.

But since the arm can only hold one atom at a time, each step would require multiple cycles.

Let's draft the arm program.

The arm starts at (0,-1), rotation 1, tip at (0,0).

Cycle 0: grab (input at (0,0)) → fire atom. Cycle 1: rotate_cw to rotation 0 (east). Cycle 2: drop (at (1,-1) → activates first glyph). Cycle 3: rotate_cw to rotation 5 (SE) → not sure, but need to get to the position to grab the salt. Wait, after dropping, the arm is at (1,-1), and the salt is there. So the arm can grab it at cycle 3. Cycle 4: rotate to south (rotation 4) to face output. Cycle 5: drop (at (1,-2) → output). Cycle 6: rotate to east (rotation 0) to return to input. Cycle 7: grab air atom (at (1,0)). Cycle 8: rotate to east (rotation 0) to face (2,-2) for second glyph. Cycle 9: drop (at (2,-2) → activates second glyph, converts air to salt. Cycle 10: grab salt. Cycle 11: rotate to south to face output. Cycle 12: drop at output.

But this is just for one product. To get 6 products, the program would need to repeat this sequence multiple times. So adding a 'repeat' command at the end to loop the process.

However, the initial reagent has only two atoms, so after two cycles, the reagent would be empty. This suggests that the process must be repeated, but the reagents are not being replenished. Therefore, this approach might not work.

Alternatively, perhaps the reagent's bond is used to create the product's bond. So after processing both atoms, the bond remains, and when both salts are delivered, the product is formed.

In this case, the arm's program would need to deliver both salts in one go. But since the arm can only carry one at a time, this would require two cycles.

Given the complexity, I'll proceed to code the arm program for one product and add a repeat to handle the required outputs.

arm_programs = {
    1: [
        ("grab", 0),          # Grab fire atom at (0,0)
        ("rotate_cw", 1),     # Rotate to east (rotation 0)
        ("drop", 2),          # Drop fire at (1,-1) to activate first calcification
        ("grab", 3),          # Grab salt from (1,-1)
        ("rotate_cw", 4),     # Rotate to south (rotation 4)
        ("drop", 5),          # Drop salt at (1,-2) output
        ("rotate_cw", 6),     # Rotate back to east
        ("grab", 7),          # Grab air atom at (1,0)
        ("rotate_cw", 8),     # Rotate to east to face second calcification at (2,-2)
        ("drop", 9),          # Drop air at (2,-2) to activate second calcification
        ("grab", 10),         # Grab salt from (2,-2)
        ("rotate_cw", 11),    # Rotate to south
        ("drop", 12),         # Drop salt at (1,-2) output
        ("repeat", 13),       # Repeat to produce 6 outputs
    ]
}

TURN 2 — REPL OBSERVATION (461 chars)


Your code ran without error but produced no printed output. The REPL does NOT auto-print expressions — you must call print(...) explicitly. For feedback, try: print(arm_numbers) # which arms exist print(safe_verify(arm_programs)) # does this dict validate? Calling submit() without first using safe_verify() usually fails. submit() no longer ends the episode on failure; it returns the verifier dict so you can iterate.

======================================================================

TURN 3 — AGENT (3844 chars)

====================================================================== Okay, let's see. The user tried to submit an arm program but got an error because there was no printed output. The assistant needs to call print() explicitly. Also, the code ran without error but didn't produce any output, so the user needs to check the verifier result.

First, I should check what arm_numbers are available. The puzzle's starter layout has arm1, arm2, arm3, arm6, and piston. But the initial code only uses arm1. Wait, the starter solution's code has arm0, but maybe the arm_numbers in the puzzle are different. The user needs to check the arm_numbers variable to know which arms are available.

In the previous code, the arm_programs only used arm 1. But maybe the arm_numbers list includes other arms. The user should print arm_numbers to confirm.

Also, the safe_verify function should be called to check if the arm_programs are valid. The previous code didn't do that, so the verification might have failed. The error could be due to invalid cycle indices or other issues.

Looking at the arm_programs, the cycles are 0 to 13. Are they strictly increasing? Yes, each cycle is unique and increasing. So the valid flag should be true. But the error might be that the program didn't produce the required outputs.

The program's repeat command at cycle 13 would loop the sequence. However, the initial steps might not correctly process both atoms. For example, after grabbing the fire atom, rotating to east, and dropping it into the first calcification glyph, the arm needs to grab the salt. Then move to the output and drop it. Then repeat for the air atom. But maybe the arm's movements are incorrect.

Another issue could be the rotation steps. Let's check the rotation calculations. The arm starts at rotation 1 (NE). Rotating clockwise (rotate_cw) would decrease rotation by 1, so rotation 0 (E). Then rotating again to face south (rotation 4) might require two more clockwise rotations. Wait, rotating clockwise once from 0 (E) is rotation 5 (SE), then again to 4 (SW). So the steps for rotating to south might be incorrect.

Also, the arm needs to reach the second calcification glyph at (2,-2). The initial position after dropping the first salt is (1,-2) (output). To reach (2,-2), the arm needs to move east, which might require rotating to east again and extending. But the arm's length is 1, so it can reach (2,-2) by rotating to east and extending if needed.

Another possible issue is that the arm might not be able to grab the salt from the glyph. After dropping the fire atom into the glyph, the glyph transforms it into salt. The salt would be at the same position (1,-1), so the arm can grab it. But the arm's tip after rotating to east is at (1,-1), so grabbing there should work.

Also, the output is at (1,-2). So after dropping the first salt, the arm needs to rotate to south (rotation 4) to move to (1,-2). Wait, the arm's base is at (0,-1) initially. When rotating to east (rotation 0), the tip is at (1,-1). To reach (1,-2), the arm needs to rotate to south (rotation 4) and maybe adjust the length. But the arm's length is 1, so the tip would be at (1,-1) + south direction. Wait, the rotation affects the direction the arm is facing. When the arm is rotated to south (rotation 4), the tip would be at (0,-1) + south direction. Hmm, maybe the rotation calculations are incorrect.

Alternatively, the arm needs to move to the output position by rotating to south and then extending. But the initial arm length is 1, so moving to (1,-2) might require a different approach.

This is quite complex. The assistant should first check the arm_numbers to confirm which arms are available. Then, verify the arm_programs using safe_verify to see if there are any errors. Based on the results, adjust the program accordingly.

print(arm_numbers)
print(safe_verify(arm_programs))

TURN 3 — REPL OBSERVATION (92 chars)


[0] {'solved': False, 'valid': False, 'error': 'ValueError: unknown arm_number 1; have [0]'}

======================================================================

TURN 4 — AGENT (2051 chars)

====================================================================== Okay, let's see. The user tried to submit an arm program for arm 1, but the error says that arm_number 1 is unknown, and the available arms are [0]. Oh right, the starter layout has arm0, which is arm1 in the puzzle's terms. Wait, the puzzle's arm_numbers are probably [0], since the starter solution uses arm0. So the user's code used arm 1, which doesn't exist. That's why the error occurred.

So the correct arm number is 0. The initial code used arm 1, which is invalid. The arm_numbers list in the puzzle is probably [0], so the arm_programs should use key 0. Let me check the starter solution code again. The starter solution adds an arm0 (arm_number=0). So the available arm is 0, not 1. Therefore, the arm_programs should be for arm 0, not 1. That's the mistake. The user needs to adjust the arm number to 0.

So the correct code would have arm_programs with key 0. Let me adjust the arm number in the program and try again. Also, the initial code's arm_programs used arm 1, which is invalid. So the fix is to use arm 0. Let's correct that and resubmit.

arm_programs = {
    0: [
        ("grab", 0),          # Grab fire atom at (0,0)
        ("rotate_cw", 1),     # Rotate to east (rotation 0)
        ("drop", 2),          # Drop fire at (1,-1) to activate first calcification
        ("grab", 3),          # Grab salt from (1,-1)
        ("rotate_cw", 4),     # Rotate to south (rotation 4)
        ("drop", 5),          # Drop salt at (1,-2) output
        ("rotate_cw", 6),     # Rotate back to east
        ("grab", 7),          # Grab air atom at (1,0)
        ("rotate_cw", 8),     # Rotate to east to face second calcification at (2,-2)
        ("drop", 9),          # Drop air at (2,-2) to activate second calcification
        ("grab", 10),         # Grab salt from (2,-2)
        ("rotate_cw", 11),    # Rotate to south
        ("drop", 12),         # Drop salt at (1,-2) output
        ("repeat", 13),       # Repeat to produce 6 outputs
    ]
}
print(arm_numbers)
print(safe_verify(arm_programs))

TURN 4 — REPL OBSERVATION (179 chars)


[0] {'valid': True, 'solved': True, 'reward': 0.37593984962406013, 'overlap': 0, 'cost': 40, 'cycles': 114, 'area': 12, 'error': None, 'error_cycle': None, 'error_location': None}

======================================================================

TURN 5 — AGENT (1700 chars)

====================================================================== Okay, let me try to figure out what's going on here. The user is trying to solve an Opus Magnum puzzle where they need to produce 6 outputs. The initial attempt had an error because the arm number was 1, but the available arm numbers are [0]. So they corrected that by using arm 0.

The next step was to create an arm program for arm 0. The program includes grabbing atoms, rotating, dropping them into calcification glyphs, and then delivering the resulting salts to the output. The program ends with a "repeat" command to loop and produce 6 outputs.

When they ran the code, the safe_verify returned valid=True and solved=True. That suggests that the program is correct and meets the requirements. However, the user is still in the loop, and the final step is to submit the solution.

But wait, the user's last code submission included the arm_programs with arm 0 and the print statements. The output from safe_verify indicates that the solution is valid and solved. So the next logical step is to call submit(arm_programs) to commit the solution.

However, the user hasn't done that yet. The final answer should be to submit the arm_programs, which would end the episode if solved. Since the safe_verify already confirmed that it's solved, the submit should work.

I need to make sure that the arm_programs are correctly structured. The arm number is 0, which is valid. The commands are properly sequenced with unique cycle indices. The repeat command at cycle 13 ensures that the program loops, allowing the arm to produce the required 6 outputs.

Therefore, the correct next step is to call submit(arm_programs) to finalize the solution.

submit(arm_programs)

TURN 5 — REPL OBSERVATION (192 chars)


[submit] SOLVED: {'valid': True, 'solved': True, 'reward': 0.37593984962406013, 'overlap': 0, 'cost': 40, 'cycles': 114, 'area': 12, 'error': None, 'error_cycle': None, 'error_location': None}

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