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feat(ruleset): PHP quick-mode rules from the engine's vocabulary, measured on the development corpus

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Quick mode had no PHP rules, so a PHP quick scan read the files and reported a plausible zero.
ruleset/php/rules.toml adds 13 line/statement rules built on semantic/php.toml's sinks, sources and
sanitizers (sql/wpdb, command, code_eval, unserialize, echo, file_inclusion, filesystem,
outbound_request, redirect). 9 are enabled and 4 are shadow (sql-call-composition, code-eval,
unserialize, xss-echo-input). A rule is shadow when it fired on the corpus but never at a known site.
precision_estimate is the measured lower bound.

Measured in-sample on the development corpus only (pmpro introduce/repair/benign, population-v1 PHP
cases; population-v2 was not read). Known site hit on the vulnerable pin in 4 of 5 cases (LearnPress
missed). The hit disappears on the fixed pin for pmpro and YesWiki. Numbers, per-pin files/bytes read
and the engine comparison are in benchmarks/measurements/2026-09-30-php-quick-rules/.

- fixtures php-vulnerable / php-benign plus manifests: ousast benchmark covers PHP
  (9/14 reported, 13/14 including shadow; the benign twin records 2 known false alerts)
- PHP `#` comments are comments; `#[...]` attributes are not
- the alerts task now reports PHP as quick coverage; alerts-engine keeps running the engine for PHP
  next to the quick rules (ENGINE_ALONGSIDE_QUICK)
- other languages' benchmark findings and metrics are unchanged

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo
This commit is contained in:
Marius Ciepluch
2026-09-30 15:05:47 +02:00
co-authored by Claude Opus 5.5
parent 45d02ecf20
commit 7927d6e539
16 changed files with 1757 additions and 17 deletions
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tests/test_ruleset.py
+3 -2
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@@ -18,8 +18,9 @@ from openultrasast.ruleset import (
def test_default_ruleset_loads_as_data() -> None:
rules = load_ruleset(DEFAULT_RULESET_DIR)
assert len(rules) == 32
assert all(rule.status == "enabled" for rule in rules)
php = [rule for rule in rules if rule.languages == ("php",)]
assert len(rules) == 32 + len(php) and len(php) == 13
assert all(rule.status == "enabled" for rule in rules if rule not in php), "PHP rules carry their measured status"
assert all(not hasattr(rule, "severity") for rule in rules) # severity is policy-governed, not rule-local