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thePR0M3TH3ANandClaude Opus 5
3395aadd1c
The Tests workflow was red on every OS and Python version for one reason:
`black --check` found 28 unformatted files. Part predates this branch (the
tui_v3 screens, core/api.py, core/index0.py); part is mine from this session.
Formatting only — verified rather than assumed, because a formatter touching
363 files is exactly where an unnoticed behaviour change would hide:
- 1223 Python tests pass, unchanged
- regenerating the fixtures after reformatting the generator produces
byte-identical output, so no hashed value moved
- differential fuzz: no divergences
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01Vtx94nXDmNgXEeThUZP4QN
103 lines
3.0 KiB
Python
103 lines
3.0 KiB
Python
#!/usr/bin/env python3
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"""Emit canonical-JSON differential cases from the Python reference.
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Entry hashes decide merge winners, so if the two implementations serialize
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the same value differently they can pick different winners and never
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converge. A security review found several such disagreements (number
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formatting, key ordering) that the existing fixtures missed because they
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only ever used ASCII keys and integer values.
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Writes js/packages/test-vectors/fixtures/canonical_json.json.
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"""
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from __future__ import annotations
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import json
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from pathlib import Path
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REPO = Path(__file__).resolve().parent.parent
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OUT = REPO / "js" / "packages" / "test-vectors" / "fixtures" / "canonical_json.json"
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# Values a vault can realistically contain, plus the edges that broke.
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CASES: list = [
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{},
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{"a": 1},
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{"b": 2, "a": 1},
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{"modified_ts": 1700000000, "label": "site"},
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{"tags": ["b", "a"], "notes": ""},
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# Key ordering: supplementary plane vs BMP above U+E000
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{"\U0001f600": 1, "！": 2},
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{"z": 1, "é": 2, "中": 3, "\U0001f600": 4},
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# Escaping
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{'quote"': "back\\slash"},
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{"ctrl": "\x00\x01\x1f"},
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{"nl": "line\nbreak\ttab"},
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{"unicode": "café 中文 \U0001f512"},
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# Numbers
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{"n": 0},
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{"n": -0},
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{"n": 1},
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{"n": -17},
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{"n": 9007199254740991},
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{"n": 0.5},
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{"n": -0.25},
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{"n": 1e-7},
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{"n": 1.5e-9},
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# Values above 2**53 are deliberately absent: JSON gives no way to tell a
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# Python int from a float there, so the two implementations cannot agree
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# on a canonical form. canonicalJson refuses them rather than guessing;
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# see the "unsupported" list below.
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# Nesting and arrays
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{"links": [{"target_id": 1, "relation": "totp", "note": ""}]},
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[1, "two", None, True, False],
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{"deep": {"a": [{"b": {"c": [1, 2, 3]}}]}},
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# Entry-shaped, the actual hashed object
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{
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"type": "password",
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"kind": "password",
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"label": "example.com",
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"length": 16,
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"archived": False,
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"notes": "",
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"tags": ["web"],
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"modified_ts": 1700000000,
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"links": [],
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"custom_fields": [],
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},
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]
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# Values TypeScript must refuse rather than serialize ambiguously.
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UNSUPPORTED = [
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{"n": 10**20},
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{"n": 12345678901234567890},
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]
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def main() -> None:
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cases = []
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for value in CASES:
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canonical = json.dumps(value, sort_keys=True, separators=(",", ":"))
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cases.append({"value": value, "canonical": canonical})
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OUT.write_text(
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json.dumps(
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{
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"description": (
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"canonicalJson must match json.dumps(sort_keys=True, "
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"separators=(',',':')) exactly: entry hashes derived from "
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"it decide merge winners across implementations."
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),
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"cases": cases,
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"unsupported": UNSUPPORTED,
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},
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indent=2,
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sort_keys=True,
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)
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+ "\n"
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)
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print(f"wrote {OUT.relative_to(REPO)} ({len(cases)} cases)")
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if __name__ == "__main__":
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main()
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