Sample
orjson 3.11.9: Swap json for orjson on Alpine, without the wheel surprise or the silent output changes
Verified sample for pypi orjson 3.11.9: Swap json for orjson on Alpine, without the wheel surprise or the silent output changes. The contract ran on python…
sha256:84dc3de1142d9942eb7c819b260089b9174ebd77f0213fd16a72c9f0640eb35e
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
python 3.12 linux · musl x64 python 3.12 python pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pypi@1 |
2026-08-14 |
| python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pypi@1 |
2026-08-18 |
Case
MIGRATION- Goal
- Swap json for orjson on Alpine, without the wheel surprise or the silent output changes
- Packages
- Symbols
-
- orjson.dumps
- orjson.loads
- orjson.OPT_SORT_KEYS
- orjson.OPT_NON_STR_KEYS
- orjson.OPT_INDENT_2
- orjson.OPT_UTC_Z
- orjson.JSONEncodeError
- orjson.JSONDecodeError
- json.dumps
- Environment
- python 3.12
- Created
- 2026-08-14T08:53:26Z
Contract
- assert pip took the musllinux wheel, orjson-3.11.9-cp312-cp312-musllinux_1_2_x86_64.whl, reconstructed from the recorded dist-info tag
- assert the distribution is a compiled extension, not pure Python, whose filename is this interpreter's own EXT_SUFFIX, and declares no runtime dependencies of its own
- assert the extension needs exactly one library, libc.so, and no file of that name exists under any directory the loader searches
- assert musl's loader resolves that name to itself, which is the only reason the extension imports
- assert no CPython library is linked, so the Py symbols are resolved from the interpreter that imports it
- assert the same ELF reader finds the versioned musl soname and libpython in the interpreter binary, so the reading is real
- assert the interpreter itself reports musl, with musl's loader present and glibc's absent
- assert orjson.dumps returns bytes where json.dumps returns str, with no separator spaces and no \uXXXX escaping
- assert OPT_INDENT_2 puts the space after the colon back and matches json.dumps(indent=2) byte for byte
- assert there is no orjson.dump or orjson.load, so writing to a file is the caller's job
- assert datetime, date, time and UUID serialize natively as RFC 3339 with +00:00 unless OPT_UTC_Z, where json raises TypeError
- assert orjson accepts default as its second positional argument and json.dumps refuses a positional there, the reverse of the usual warning
- assert every other json.dumps keyword is a TypeError, and sort_keys is instead option=OPT_SORT_KEYS with the same code point ordering
- assert orjson.JSONEncodeError is builtins.TypeError itself while JSONDecodeError is a real subclass of json.JSONDecodeError
- assert non-str dict keys raise unless OPT_NON_STR_KEYS, while json coerces them silently and loses a value when two keys collide
- assert nan and infinity serialize as null with the default hook never consulted, while json emits tokens orjson then refuses to read back
- assert a walk over the payload finds the non-finite floats orjson will not report
- assert a non-finite Decimal raises instead of vanishing, until a default hook floats it and it becomes null too
- assert integers outside -2**63 through 2**64-1 raise where json prints them
Files
- csx.json
- requirements.txt
- src/__init__.py
- src/serialize.py
- src/wheel.py
- test/contract.py