SyncVals · Trajectory

lru-cache

codex gpt-5.5 ✓ resolved GOOD_SUCCESS ↑ View task

Solved from the instruction alone, tests/ and solution/ were withheld from the agent's workspace and restored only for grading.

Reward = tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.

Classification , post-hoc; cannot change the reward

GOOD_SUCCESSLegitimate solve, implements the asked-for behavior; tests verify real functionality.

SubtypeLegitimate Solution

EvidenceAll 13 tests passed: test_output_exists, test_shipped_input_correct, test_shipped_exercises_the_gate, test_shipped_invariants, and 8 parametrized test_hidden_inputs tests with different seeds (3, 4, 8, 11, 13, 16, 33, 47). The agent's output for the shipped trace was: get_results=[100, 200, 100, 300, 100, 200, -1, 400, 100, 200, -1, 800, -1], final_probation=[[2, 200]], final_protected=[[1, 150], [8, 800]], total_weight=5, rejected=2. The reference implementation uses a completely different internal representation (plain Python lists + flat record dict), confirming the agent's solution is genuinely implementing the algorithm, not pattern-matching.

Root causeThe agent correctly implemented a complex segmented cache simulator with all required features: logical-clock expiry with correct boundary semantics, frequency-gated admission with strict inequality checking, promotion/demotion transitions between segments, and periodic frequency halving. The solution demonstrates deep understanding by handling subtle rules like 'evict around the updated key' and proper frequency state management across evictions.

RecommendationN/A - task is fine

Trajectory

Tool-by-tool agent trajectory

30 tool calls · 2 tool types · 41 steps

I’ll inspect the workspace and the trace shape first, then implement the replay logic in `main.py` and run it to generate `output/result.json`.

shell

/bin/zsh -lc 'ls -la'

shell

/bin/zsh -lc 'ls -la'

output

total 40
drwxr-xr-x  7 jaykumar  staff   224 Jun 17 22:49 .
drwx------  4 jaykumar  staff   128 Jun 17 22:49 ..
drwxr-xr-x  3 jaykumar  staff    96 Jun 17 14:36 data
drwxr-xr-x  3 jaykumar  staff    96 Jun 17 14:36 environment
-rw-r--r--  1 jaykumar  staff  9746 Jun 17 14:36 instruction.md
-rw-r--r--  1 jaykumar  staff  1049 Jun 17 14:36 main.py
-rw-r--r--  1 jaykumar  staff   323 Jun 17 14:36 task.toml

shell

/bin/zsh -lc 'rg --files'

shell

/bin/zsh -lc 'rg --files'

output

data/operations.json
main.py
task.toml
environment/README.md
instruction.md

I found an existing `main.py`, so I’m checking what is already there and the input metadata before deciding whether to patch or replace it.

shell

/bin/zsh -lc "sed -n '1,240p' main.py"

shell

/bin/zsh -lc "sed -n '1,240p' main.py"

output

# Read data/operations.json and write output/result.json.
#
# The input object carries: capacity, protected_capacity, default_ttl, miss,
# reset_interval, and operations (a list of ["put", key, value, cost] or
# ["get", key] entries).
#
# The output object must carry: get_results, final_probation, final_protected,
# total_weight, and rejected. See the task instructions for the exact rules
# (segmented recency, logical-clock expiry, weight budget, frequency-gated
# admission, demotion-on-overflow, and periodic frequency halving).
#
# TODO: implement the cache. The stub below writes an empty, incorrect result
# so that an unmodified program does not pass.
import json
import os

with open("data/operations.json") as f:
    data = json.load(f)

capacity = data["capacity"]
operations = data["operations"]

result = {
    "get_results": [],
    "final_probation": [],
    "final_protected": [],
    "total_weight": 0,
    "rejected": 0,
}

os.makedirs("output", exist_ok=True)
with open("output/result.json", "w") as f:
    json.dump(result, f)

shell

/bin/zsh -lc "python3 - <<'PY'
import json
with open('data/operations.json') as f:
    d=json.load(f)
print({k:d[k] for k in d if k"'!='"'operations'})
print('ops', len(d['operations']))
print('gets', sum(1 for op in d['operations'] if op[0]=='get'))
print('puts', sum(1 for op in d['operations'] if op[0]=='put'))
print('first10', d['operations'][:10])
print('last10', d['operations'][-10:])
PY"

shell

/bin/zsh -lc "python3 - <<'PY'
import json
with open('data/operations.json') as f:
    d=json.load(f)
print({k:d[k] for k in d if k"'!='"'operations'})
print('ops', len(d['operations']))
print('gets', sum(1 for op in d['operations'] if op[0]=='get'))
print('puts', sum(1 for op in d['operations'] if op[0]=='put'))
print('first10', d['operations'][:10])
print('last10', d['operations'][-10:])
PY"

output

{'capacity': 9, 'protected_capacity': 4, 'default_ttl': 8, 'miss': -1, 'reset_interval': 7}
ops 22
gets 13
puts 9
first10 [['put', 1, 100, 2], ['put', 2, 200, 2], ['put', 3, 300, 1], ['get', 1], ['get', 2], ['get', 1], ['put', 4, 400, 2], ['get', 3], ['get', 1], ['put', 5, 500, 2]]
last10 [['put', 6, 600, 3], ['get', 4], ['put', 7, 700, 4], ['get', 1], ['get', 2], ['put', 8, 800, 1], ['get', 3], ['put', 1, 150, 2], ['get', 8], ['get', 77]]

shell

/bin/zsh -lc "python3 -m json.tool data/operations.json | sed -n '1,80p'"

shell

/bin/zsh -lc "python3 -m json.tool data/operations.json | sed -n '1,80p'"

output

{
    "capacity": 9,
    "protected_capacity": 4,
    "default_ttl": 8,
    "miss": -1,
    "reset_interval": 7,
    "operations": [
        [
            "put",
            1,
            100,
            2
        ],
        [
            "put",
            2,
            200,
            2
        ],
        [
            "put",
            3,
            300,
            1
        ],
        [
            "get",
            1
        ],
        [
            "get",
            2
        ],
        [
            "get",
            1
        ],
        [
            "put",
            4,
            400,
            2
        ],
        [
            "get",
            3
        ],
        [
            "get",
            1
        ],
        [
            "put",
            5,
            500,
            2
        ],
        [
            "get",
            2
        ],
        [
            "get",
            99
        ],
        [
            "put",
            6,
            600,
            3
        ],
        [
            "get",
            4
        ],
        [
            "put",
            7,
            700,
            4

The stub only writes an empty result. I’m going to replace it with a small explicit simulator using ordered dictionaries for the two recency segments, keeping weights and frequencies separately so eviction and aging follow the trace rules exactly.

One edge case I’m handling explicitly: updates are always honored and the updated key is skipped during cleanup evictions. For new-key refusal, I’m counting any new entry that is refused admission, including entries too large to ever fit, because those are still refused new-key admissions under the final `rejected` definition.

I’m applying the simulator now. The implementation keeps the operation order as the logical clock, sweeps before every operation, and performs frequency aging only after the operation whose position hits `reset_interval`.

write · /var/folders/4w/8dz5qwsn6p79xjvgb6gwgs640000gn/T/eval-platform-local-tia4opjb/workspace/main.py

(empty file)

write · /var/folders/4w/8dz5qwsn6p79xjvgb6gwgs640000gn/T/eval-platform-local-tia4opjb/workspace/main.py

(empty file)

The old stub is removed; I’m adding the full implementation in its place.

write · /var/folders/4w/8dz5qwsn6p79xjvgb6gwgs640000gn/T/eval-platform-local-tia4opjb/workspace/main.py

(empty file)

write · /var/folders/4w/8dz5qwsn6p79xjvgb6gwgs640000gn/T/eval-platform-local-tia4opjb/workspace/main.py

(empty file)

`main.py` is in place. I’m running it against the provided trace now, then I’ll inspect the generated JSON for shape and basic invariants.

shell

/bin/zsh -lc 'python3 main.py'

shell

/bin/zsh -lc 'python3 main.py'

shell

/bin/zsh -lc 'python3 -m py_compile main.py'

shell

/bin/zsh -lc 'python3 -m py_compile main.py'

The script runs cleanly and creates the output file. I’m checking the produced result and whether the number of read results matches the trace’s number of `get` operations.

shell

/bin/zsh -lc "python3 - <<'PY'
import json
with open('data/operations.json') as f:
    d = json.load(f)
with open('output/result.json') as f:
    r = json.load(f)
print('keys', list(r))
print('gets expected', sum(1 for op in d['operations'] if op[0] == 'get'))
print('gets actual', len(r['get_results']))
print('capacity', d['capacity'])
print('total_weight', r['total_weight'])
print('result_exists', __import__('os').path.exists('output/result.json'))
PY"

shell

/bin/zsh -lc 'python3 -m json.tool output/result.json'

shell

/bin/zsh -lc 'python3 -m json.tool output/result.json'

output

{
    "get_results": [
        100,
        200,
        100,
        300,
        100,
        200,
        -1,
        400,
        100,
        200,
        -1,
        800,
        -1
    ],
    "final_probation": [
        [
            2,
            200
        ]
    ],
    "final_protected": [
        [
            1,
            150
        ],
        [
            8,
            800
        ]
    ],
    "total_weight": 5,
    "rejected": 2
}

shell

/bin/zsh -lc "python3 - <<'PY'
import json
with open('data/operations.json') as f:
    d = json.load(f)
with open('output/result.json') as f:
    r = json.load(f)
print('keys', list(r))
print('gets expected', sum(1 for op in d['operations'] if op[0] == 'get'))
print('gets actual', len(r['get_results']))
print('capacity', d['capacity'])
print('total_weight', r['total_weight'])
print('result_exists', __import__('os').path.exists('output/result.json'))
PY"

output

keys ['get_results', 'final_probation', 'final_protected', 'total_weight', 'rejected']
gets expected 13
gets actual 13
capacity 9
total_weight 5
result_exists True

shell

/bin/zsh -lc "python3 - <<'PY'
import json
with open('data/operations.json') as f:d=json.load(f)
for i,op in enumerate(d['operations'],1): print(i,op)
PY"

shell

/bin/zsh -lc "python3 - <<'PY'
import json
with open('data/operations.json') as f:d=json.load(f)
for i,op in enumerate(d['operations'],1): print(i,op)
PY"

output

1 ['put', 1, 100, 2]
2 ['put', 2, 200, 2]
3 ['put', 3, 300, 1]
4 ['get', 1]
5 ['get', 2]
6 ['get', 1]
7 ['put', 4, 400, 2]
8 ['get', 3]
9 ['get', 1]
10 ['put', 5, 500, 2]
11 ['get', 2]
12 ['get', 99]
13 ['put', 6, 600, 3]
14 ['get', 4]
15 ['put', 7, 700, 4]
16 ['get', 1]
17 ['get', 2]
18 ['put', 8, 800, 1]
19 ['get', 3]
20 ['put', 1, 150, 2]
21 ['get', 8]
22 ['get', 77]

The generated result has the expected schema and 13 read outputs for 13 `get`s. I’m doing one more replay inspection with per-step state because the tricky parts are promotion, demotion, expiry, and frequency-gated rejection.

shell

/bin/zsh -lc "python3 - <<'PY'
import json
from main import SegmentedCache
with open('data/operations.json') as f: d=json.load(f)
c=SegmentedCache(d['capacity'], d['protected_capacity'], d['default_ttl'], d['miss'], d['reset_interval'])
for op in d['operations']:
    c.run([op])
    print(c.clock, op, 'prob', [(k,e.value,e.cost,e.expiry) for k,e in c.probation.items()], 'prot', [(k,e.value,e.cost,e.expiry) for k,e in c.protected.items()], 'tw', c.total_weight, 'pw', c.protected_weight, 'rej', c.rejected, 'freq', dict(sorted(c.frequency.items())))
print(c.result())
PY"

shell

/bin/zsh -lc "python3 - <<'PY'
import json
from main import SegmentedCache
with open('data/operations.json') as f: d=json.load(f)
c=SegmentedCache(d['capacity'], d['protected_capacity'], d['default_ttl'], d['miss'], d['reset_interval'])
for op in d['operations']:
    c.run([op])
    print(c.clock, op, 'prob', [(k,e.value,e.cost,e.expiry) for k,e in c.probation.items()], 'prot', [(k,e.value,e.cost,e.expiry) for k,e in c.protected.items()], 'tw', c.total_weight, 'pw', c.protected_weight, 'rej', c.rejected, 'freq', dict(sorted(c.frequency.items())))
print(c.result())
PY"

output

1 ['put', 1, 100, 2] prob [(1, 100, 2, 9)] prot [] tw 2 pw 0 rej 0 freq {1: 1}
2 ['put', 2, 200, 2] prob [(1, 100, 2, 9), (2, 200, 2, 10)] prot [] tw 4 pw 0 rej 0 freq {1: 1, 2: 1}
3 ['put', 3, 300, 1] prob [(1, 100, 2, 9), (2, 200, 2, 10), (3, 300, 1, 11)] prot [] tw 5 pw 0 rej 0 freq {1: 1, 2: 1, 3: 1}
4 ['get', 1] prob [(2, 200, 2, 10), (3, 300, 1, 11)] prot [(1, 100, 2, 12)] tw 5 pw 2 rej 0 freq {1: 2, 2: 1, 3: 1}
5 ['get', 2] prob [(3, 300, 1, 11)] prot [(1, 100, 2, 12), (2, 200, 2, 13)] tw 5 pw 4 rej 0 freq {1: 2, 2: 2, 3: 1}
6 ['get', 1] prob [(3, 300, 1, 11)] prot [(2, 200, 2, 13), (1, 100, 2, 14)] tw 5 pw 4 rej 0 freq {1: 3, 2: 2, 3: 1}
7 ['put', 4, 400, 2] prob [(3, 300, 1, 11), (4, 400, 2, 15)] prot [(2, 200, 2, 13), (1, 100, 2, 14)] tw 7 pw 4 rej 0 freq {1: 1, 2: 1, 3: 0, 4: 0}
8 ['get', 3] prob [(4, 400, 2, 15), (2, 200, 2, 13)] prot [(1, 100, 2, 14), (3, 300, 1, 16)] tw 7 pw 3 rej 0 freq {1: 1, 2: 1, 3: 1, 4: 0}
9 ['get', 1] prob [(4, 400, 2, 15), (2, 200, 2, 13)] prot [(3, 300, 1, 16), (1, 100, 2, 17)] tw 7 pw 3 rej 0 freq {1: 2, 2: 1, 3: 1, 4: 0}
10 ['put', 5, 500, 2] prob [(4, 400, 2, 15), (2, 200, 2, 13), (5, 500, 2, 18)] prot [(3, 300, 1, 16), (1, 100, 2, 17)] tw 9 pw 3 rej 0 freq {1: 2, 2: 1, 3: 1, 4: 0, 5: 1}
11 ['get', 2] prob [(4, 400, 2, 15), (5, 500, 2, 18), (3, 300, 1, 16)] prot [(1, 100, 2, 17), (2, 200, 2, 19)] tw 9 pw 4 rej 0 freq {1: 2, 2: 2, 3: 1, 4: 0, 5: 1}
12 ['get', 99] prob [(4, 400, 2, 15), (5, 500, 2, 18), (3, 300, 1, 16)] prot [(1, 100, 2, 17), (2, 200, 2, 19)] tw 9 pw 4 rej 0 freq {1: 2, 2: 2, 3: 1, 4: 0, 5: 1, 99: 1}
13 ['put', 6, 600, 3] prob [(4, 400, 2, 15), (5, 500, 2, 18), (3, 300, 1, 16)] prot [(1, 100, 2, 17), (2, 200, 2, 19)] tw 9 pw 4 rej 1 freq {1: 2, 2: 2, 3: 1, 4: 0, 5: 1, 6: 1, 99: 1}
14 ['get', 4] prob [(5, 500, 2, 18), (3, 300, 1, 16), (1, 100, 2, 17)] prot [(2, 200, 2, 19), (4, 400, 2, 22)] tw 9 pw 4 rej 1 freq {1: 1, 2: 1, 3: 0, 4: 0, 5: 0, 6: 0, 99: 0}
15 ['put', 7, 700, 4] prob [(5, 500, 2, 18), (3, 300, 1,
… (+1512 chars truncated)

The step-by-step replay lines up with the expected transitions: both rejections occur where the new key ties an eviction candidate’s frequency, and the final sweep at clock 22 drops the expired probation entry before the last miss is recorded.

shell

/bin/zsh -lc 'git diff -- main.py output/result.json'

shell

/bin/zsh -lc 'git diff -- main.py output/result.json'

output

diff --git a/main.py b/output/result.json
index 1d1bbdf..2a9a0e3 100644
--- a/main.py
+++ b/output/result.json
@@ -1,218 +1 @@
-import json
-import os
-from collections import OrderedDict, defaultdict
-from dataclasses import dataclass
-
-
-@dataclass
-class Entry:
-    value: int
-    cost: int
-    expiry: int
-
-
-class SegmentedCache:
-    def __init__(self, capacity, protected_capacity, default_ttl, miss, reset_interval):
-        self.capacity = capacity
-        self.protected_capacity = protected_capacity
-        self.default_ttl = default_ttl
-        self.miss = miss
-        self.reset_interval = reset_interval
-
-        self.clock = 0
-        self.processed = 0
-        self.total_weight = 0
-        self.protected_weight = 0
-        self.rejected = 0
-        self.get_results = []
-        self.frequency = defaultdict(int)
-
-        self.probation = OrderedDict()
-        self.protected = OrderedDict()
-
-    def run(self, operations):
-        for operation in operations:
-            self.clock += 1
-            self.processed += 1
-            self._sweep_expired()
-
-            kind = operation[0]
-            key = operation[1]
-            self.frequency[key] += 1
-
-            if kind == "get":
-                self._get(key)
-            elif kind == "put":
-                self._put(key, operation[2], operation[3])
-            else:
-                raise ValueError(f"unknown operation: {kind}")
-
-            if self.processed % self.reset_interval == 0:
-                self._age_frequencies()
-
-    def result(self):
-        return {
-            "get_results": self.get_results,
-            "final_probation": self._segment_pairs(self.probation),
-            "final_protected": self._segment_pairs(self.protected),
-            "total_weight": self.total_weight,
-            "rejected": self.rejected,
-        }
-
-    def _segment_pairs(self, segment):
-        return [[key, entry.value] for key, entry in segment.items()]
-
-    def
… (+5330 chars truncated)

shell

/bin/zsh -lc 'git status --short'

shell

/bin/zsh -lc 'git status --short'

output

fatal: not a git repository (or any of the parent directories): .git

Implemented [main.py](/var/folders/4w/8dz5qwsn6p79xjvgb6gwgs640000gn/T/eval-platform-local-tia4opjb/workspace/main.py) and generated `output/result.json`. Final result: ```json { "get_results": [100, 200, 100, 300, 100, 200, -1, 400, 100, 200, -1, 800, -1], "final_probation": [[2, 200]], "final_protected": [[1, 150], [8, 800]], "total_weight": 5, "rejected": 2 } ``` Verified with `python3 main.py` and `python3 -m py_compile main.py`.

Final diff , what the agent changed

--- a/main.py

+++ b/main.py

@@ -1,33 +1,218 @@

-# Read data/operations.json and write output/result.json.

-# The input object carries: capacity, protected_capacity, default_ttl, miss,

-# reset_interval, and operations (a list of ["put", key, value, cost] or

-# ["get", key] entries).

-# The output object must carry: get_results, final_probation, final_protected,

-# total_weight, and rejected. See the task instructions for the exact rules

-# (segmented recency, logical-clock expiry, weight budget, frequency-gated

-# admission, demotion-on-overflow, and periodic frequency halving).

-# TODO: implement the cache. The stub below writes an empty, incorrect result

-# so that an unmodified program does not pass.

import json

import os

-with open("data/operations.json") as f:

- data = json.load(f)

-capacity = data["capacity"]

-operations = data["operations"]

-result = {

- "get_results": [],

- "final_probation": [],

- "final_protected": [],

- "total_weight": 0,

- "rejected": 0,

-os.makedirs("output", exist_ok=True)

-with open("output/result.json", "w") as f:

- json.dump(result, f)

+from collections import OrderedDict, defaultdict

+from dataclasses import dataclass

+@dataclass

+class Entry:

+ value: int

+ cost: int

+ expiry: int

+class SegmentedCache:

+ def __init__(self, capacity, protected_capacity, default_ttl, miss, reset_interval):

+ self.capacity = capacity

+ self.protected_capacity = protected_capacity

+ self.default_ttl = default_ttl

+ self.miss = miss

+ self.reset_interval = reset_interval

+ self.clock = 0

+ self.processed = 0

+ self.total_weight = 0

+ self.protected_weight = 0

+ self.rejected = 0

+ self.get_results = []

+ self.frequency = defaultdict(int)

+ self.probation = OrderedDict()

+ self.protected = OrderedDict()

+ def run(self, operations):

+ for operation in operations:

+ self.clock += 1

+ self.processed += 1

+ self._sweep_expired()

+ kind = operation[0]

+ key = operation[1]

+ self.frequency[key] += 1

+ if kind == "get":

+ self._get(key)

+ elif kind == "put":

+ self._put(key, operation[2], operation[3])

+ else:

+ raise ValueError(f"unknown operation: {kind}")

+ if self.processed % self.reset_interval == 0:

+ self._age_frequencies()

+ def result(self):

+ return {

+ "get_results": self.get_results,

+ "final_probation": self._segment_pairs(self.probation),

+ "final_protected": self._segment_pairs(self.protected),

+ "total_weight": self.total_weight,

+ "rejected": self.rejected,

+ }

+ def _segment_pairs(self, segment):

+ return [[key, entry.value] for key, entry in segment.items()]

+ def _new_expiry(self):

+ return self.clock + self.default_ttl

+ def _sweep_expired(self):

+ for key, entry in list(self.probation.items()):

+ if entry.expiry <= self.clock:

+ self._remove_from_probation(key)

+ for key, entry in list(self.protected.items()):

+ if entry.expiry <= self.clock:

+ self._remove_from_protected(key)

+ def _age_frequencies(self):

+ for key in list(self.frequency):

+ self.frequency[key] //= 2

+ def _get(self, key):

+ if key in self.protected:

+ entry = self.protected[key]

+ entry.expiry = self._new_expiry()

+ self.protected.move_to_end(key)

+ self.get_results.append(entry.value)

+ return

+ if key in self.probation:

+ entry = self.probation.pop(key)

+ entry.expiry = self._new_expiry()

+ self.protected[key] = entry

+ self.protected_weight += entry.cost

+ self.get_results.append(entry.value)

+ self._demote_protected_overflow()

+ return

+ self.get_results.append(self.miss)

+ def _put(self, key, value, cost):

+ if key in self.protected:

+ entry = self.protected[key]

+ self.total_weight += cost - entry.cost

+ self.protected_weight += cost - entry.cost

+ entry.value = value

+ entry.cost = cost

+ entry.expiry = self._new_expiry()

+ self.protected.move_to_end(key)

+ self._evict_until_within_capacity(skip_key=key)

+ return

+ if key in self.probation:

+ entry = self.probation[key]

+ self.total_weight += cost - entry.cost

+ entry.value = value

+ entry.cost = cost

+ entry.expiry = self._new_expiry()

+ self.probation.move_to_end(key)

+ self._evict_until_within_capacity(skip_key=key)

+ return

+ self._admit_new(key, value, cost)

+ def _admit_new(self, key, value, cost):

+ if cost > self.capacity:

+ self.rejected += 1

+ return

+ needed = self.total_weight + cost - self.capacity

+ victims = []

+ freed = 0

+ if needed > 0:

+ new_frequency = self.frequency[key]

+ for victim_key, victim_entry in self._eviction_candidates():

+ if self.frequency[victim_key] >= new_frequency:

+ self.rejected += 1

+ return

+ victims.append(victim_key)

+ freed += victim_entry.cost

+ if freed >= needed:

+ break

+ for victim_key in victims:

+ self._remove_resident(victim_key)

+ self.probation[key] = Entry(value=value, cost=cost, expiry=self._new_expiry())

+ self.total_weight += cost

+ def _eviction_candidates(self):

+ for key, entry in self.probation.items():

+ yield key, entry

+ for key, entry in self.protected.items():

+ yield key, entry

+ def _demote_protected_overflow(self):

+ while self.protected_weight > self.protected_capacity:

+ key, entry = self.protected.popitem(last=False)

+ self.protected_weight -= entry.cost

+ self.probation[key] = entry

+ def _evict_until_within_capacity(self, skip_key):

+ while self.total_weight > self.capacity:

+ victim_key = self._first_evictable_key(self.probation, skip_key)

+ if victim_key is not None:

+ self._remove_from_probation(victim_key)

+ continue

+ victim_key = self._first_evictable_key(self.protected, skip_key)

+ if victim_key is not None:

+ self._remove_from_protected(victim_key)

+ continue

+ break

+ def _first_evictable_key(self, segment, skip_key):

+ for key in segment:

+ if key != skip_key:

+ return key

+ return None

+ def _remove_resident(self, key):

+ if key in self.probation:

+ self._remove_from_probation(key)

+ else:

+ self._remove_from_protected(key)

+ def _remove_from_probation(self, key):

+ entry = self.probation.pop(key)

+ self.total_weight -= entry.cost

+ def _remove_from_protected(self, key):

+ entry = self.protected.pop(key)

+ self.total_weight -= entry.cost

+ self.protected_weight -= entry.cost

+def main():

+ with open("data/operations.json") as f:

+ data = json.load(f)

+ cache = SegmentedCache(

+ capacity=data["capacity"],

+ protected_capacity=data["protected_capacity"],

+ default_ttl=data["default_ttl"],

+ miss=data["miss"],

+ reset_interval=data["reset_interval"],

+ )

+ cache.run(data["operations"])

+ os.makedirs("output", exist_ok=True)

+ with open("output/result.json", "w") as f:

+ json.dump(cache.result(), f)

+if __name__ == "__main__":

+ main()

--- /dev/null

+++ b/output/result.json

@@ -0,0 +1 @@

+{"get_results": [100, 200, 100, 300, 100, 200, -1, 400, 100, 200, -1, 800, -1], "final_probation": [[2, 200]], "final_protected": [[1, 150], [8, 800]], "total_weight": 5, "rejected": 2}

Verifier output , the proof behind the reward

tests/test.sh

============================= test session starts ==============================
platform darwin -- Python 3.12.4, pytest-8.4.1, pluggy-1.6.0 -- /Library/Frameworks/Python.framework/Versions/3.12/bin/python3
cachedir: .pytest_cache
rootdir: <tmp>/workspace
plugins: anyio-4.12.1, respx-0.22.0, mock-3.15.1, asyncio-0.21.1
asyncio: mode=Mode.STRICT
collecting ... collected 13 items

tests/test_outputs.py::test_output_exists PASSED                         [  7%]
tests/test_outputs.py::test_shipped_input_correct PASSED                 [ 15%]
tests/test_outputs.py::test_shipped_exercises_the_gate PASSED            [ 23%]
tests/test_outputs.py::test_shipped_invariants PASSED                    [ 30%]
tests/test_outputs.py::test_hidden_inputs[3] PASSED                      [ 38%]
tests/test_outputs.py::test_hidden_inputs[4] PASSED                      [ 46%]
tests/test_outputs.py::test_hidden_inputs[8] PASSED                      [ 53%]
tests/test_outputs.py::test_hidden_inputs[11] PASSED                     [ 61%]
tests/test_outputs.py::test_hidden_inputs[13] PASSED                     [ 69%]
tests/test_outputs.py::test_hidden_inputs[16] PASSED                     [ 76%]
tests/test_outputs.py::test_hidden_inputs[33] PASSED                     [ 84%]
tests/test_outputs.py::test_hidden_inputs[47] PASSED                     [ 92%]
tests/test_outputs.py::test_hidden_inputs_are_nontrivial PASSED          [100%]

============================== 13 passed in 0.26s ==============================

Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_deca1302fe314dd3. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.

Trial trial_deca1302fe314dd3 · verifier authoritative; classifier explanatory.