alexmandClaude
ea0a7efa78
Features for the next six months (accessible HTML export, paperpack and
Lode on packages, the personal bundle):
- Zipped packages: the oracle writes and reads `.sct.zip` archives under
the rules of spec/12 §12.2; validate.py and load.py accept them; a
byte-identical zip of the tiny package joins the fixtures, and two
broken archives (traversal, symbolic link) join fixtures/invalid.
- The target set of targeted F3 (spec/08 §8.10) is computed by the
oracle and pinned by vectors/targets.jsonl under each digit rule; the
rule now covers cells as well as sentences and the leaves of anchored
containers, and defines a node's section.
- scienting-checklist/1 (provisional): a conformance check of an export,
covered by a receipt as ["checklist", id, hash] (spec/08 §8.11), with a
WCAG 2.1 AA fixture and its receipt.
- QA reports are signed like receipts (spec/08 §8.9).
- A `description` annotation body with role alt or long, so an
accessible export can find a confirmed figure description; the layer
fixture carries one, and the store's body-kind constraint allows it.
- scienting-spot-check/1, the seed payload, is registered with a schema.
- exercise, submission and grade are provisional until a course has
used them.
Audit fixes, each with a vector or a broken package where one was
missing:
- Folder packages: symbolic links are refused on validate and load,
manifest paths must not collide under case folding, listed files are
matched by exact name, files are hashed in chunks under a size limit.
- Files are compared byte for byte, so CR LF, a byte order mark, NaN,
a lone surrogate or invalid UTF-8 is refused instead of translated;
integers beyond 2^53 are read as doubles, as canonical JSON writes them.
- Receipts: signature.key must equal by and the key must be valid when
signed; a qa receipt's nodes must be the sample at the original's
hashes, its scope must name qa.of, its errors must be sampled nodes;
statuses are computed once, iteratively, so chains of spot-checks
hundreds deep settle; Base64 and manifest shape errors become refusals
instead of tracebacks; counts and the fidelity of roster-less packages
are recomputed.
- The gate enforces rule 11 of spec/11 §11.4: changed nodes are
validated against the node schema and the references between nodes
are checked, so a set to a bad value, an insert with unknown
properties or a delete of a referenced header cell is refused; a
relabel to null drops the label; a reclassify drops foreign
attributes; a split strips whitespace across runs; ids.jsonl order
follows spec/04 §4.4 in every state; a move after itself is refused.
- Anchors: the relabel rule requires that nothing else changed below the
node; an alias chain ending in a deletion no longer crashes resolve.
- Notation: a script after an empty group applies to the previous atom
({}^{14}C); letters are defined by Unicode block in spec/05 §5.4 and
the oracle; \left) is complex.
- Page fingerprints delete whitespace before folding, so "10 -20" and
"10-20" fold alike (spec/07 §7.1).
- Grades are summed with exact decimals; the reviewer error bound is
computed with integer arithmetic.
- receipts and revocations are keyed by (doc_key, id) in SQL, since one
revocation may be carried by several packages.
Checking:
- tools/stress.py: seeded randomized property tests over canonical JSON,
normalization, notation, random correction walks, anchor resolution,
Merkle roots, spot-check samples, error bounds, fingerprints, mutated
archives and packages, rights and spot-check chains; CI runs it.
- check.py verifies every count and version the prose states against
the repository, the zipped fixture and crafted archives, the checklist
coverage, and nine more broken packages.
- CONTRIBUTING.md gains a release checklist.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
67 lines
1.9 KiB
Python
67 lines
1.9 KiB
Python
"""Page fingerprints, scienting-page/1, and download-stamp rules, scienting-stamps/1.
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Non-normative; see spec/07-geometry.md.
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"""
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import math
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import re
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import unicodedata
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from . import jcs
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from .notation import fold_plain_text
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from .text import is_ws, norm, sha256_hex
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def round_point(x):
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"""Round half up to a whole point."""
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return int(math.floor(x + 0.5))
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def _in_margin(box, size, margin):
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x0, y0, x1, y1 = box
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w, h = size
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return x1 <= margin or x0 >= w - margin or y1 <= margin or y0 >= h - margin
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def is_stamp(line, size, rules):
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text = norm(line["text"])
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for r in rules:
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if r.get("where", "any") == "margin":
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if "box" not in line or not _in_margin(line["box"], size, r.get("margin", 36)):
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continue
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if re.search(r["pattern"], text, re.IGNORECASE | re.ASCII):
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return r["id"]
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return None
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def _strip(s):
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return "".join(c for c in s if not is_ws(c) and unicodedata.category(c) not in ("Cc", "Cf"))
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def fp_text(text):
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"""Steps 3 and 4 of spec/07 §7.1: whitespace and control characters go first, so that "10 -20" and "10-20"
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fold alike; then scripts and dashes fold as in the strict projection, then NFKC."""
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return _strip(unicodedata.normalize("NFKC", fold_plain_text(_strip(text))))
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def fingerprint(page, rules):
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"""`page`: {"size": [w, h], "lines": [{"text", "box"?}], "images": [sha256...]}.
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Returns (fingerprint, removed stamp rule IDs in line order).
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"""
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size = page["size"]
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kept, removed = [], []
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for line in page.get("lines", []):
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rid = is_stamp(line, size, rules)
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if rid:
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removed.append(rid)
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else:
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kept.append(line["text"])
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payload = {
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"format": "scienting-page/1",
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"size": [round_point(size[0]), round_point(size[1])],
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"text": fp_text(" ".join(kept)),
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"images": sorted(page.get("images", [])),
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}
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return sha256_hex(jcs.dumpb(payload)), removed
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