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rule-synth

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UpdatedMay 29, 2026 at 02:51

Synthesize CodeQL queries / Joern scripts from confirmed findings — the heavy semantic engines /semgrep-rule (Semgrep-only) doesn't cover. The rule-synthesist agent writes a tight rule per seed; the host runs a native compile → fire-on-seed → repo-run → precision gate and persists only validated rules into a digest-attested pack under .kuzushi/rules/{codeql,joern}/, promoting new matches as candidate leads. Needs a confirmed finding + a built CodeQL DB / Joern CPG.

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allsmog

allsmog/kuzushi-security-plugin

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name	rule-synth
description	Synthesize CodeQL queries / Joern scripts from confirmed findings — the heavy semantic engines /semgrep-rule (Semgrep-only) doesn't cover. The rule-synthesist agent writes a tight rule per seed; the host runs a native compile → fire-on-seed → repo-run → precision gate and persists only validated rules into a digest-attested pack under .kuzushi/rules/{codeql,joern}/, promoting new matches as candidate leads. Needs a confirmed finding + a built CodeQL DB / Joern CPG.
context	fork
agent	rule-synthesist
user-invocable	false

Rule synthesis (CodeQL / Joern)

Lift a confirmed finding into a validated, reusable semantic detection rule for CodeQL/Joern — complementary to /semgrep-rule (which covers Semgrep). Accepted rules land in a digest-attested pack (.kuzushi/rules/{codeql,joern}/ + pack.json); the codeql/joern MCP servers refuse to run a pack query whose bytes don't match the manifest, so generated queries are validated before they execute.

Requires: a confirmed/proven/exploitable finding in findings.json, and a built CodeQL DB or Joern CPG (/build-databases). For Semgrep, use /semgrep-rule instead.

Run node "${CLAUDE_PLUGIN_ROOT}/scripts/cmd/rule-synth-prepare.mjs" --target "<repo root>". If status is no-seeds (run /verify or /threat-hunt first) or no-engine (run /build-databases, or /semgrep-rule for Semgrep), report that and stop. Read prepPath.
For each seed, write a tight CodeQL .ql / Joern .sc for the recommendedEngine into the run dir, using the seed's seedFingerprint as seedRef. Joern scripts must open the CPG from KUZUSHI_CPG and print matches as KUZUSHI_MATCH\t<file>\t<line>. Write the { rules: [...] } bundle to the prep's draftPath.
Run the assembleCommand (finalize). It compiles each rule, checks it fires on the seed line, runs it across the repo, and caps it for precision — accepting only those that pass into the pack and promoting new matches as candidate findings. Report accepted/rejected per seed.

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name	rule-synth
description	Synthesize CodeQL queries / Joern scripts from confirmed findings — the heavy semantic engines /semgrep-rule (Semgrep-only) doesn't cover. The rule-synthesist agent writes a tight rule per seed; the host runs a native compile → fire-on-seed → repo-run → precision gate and persists only validated rules into a digest-attested pack under .kuzushi/rules/{codeql,joern}/, promoting new matches as candidate leads. Needs a confirmed finding + a built CodeQL DB / Joern CPG.
context	fork
agent	rule-synthesist
user-invocable	false

Rule synthesis (CodeQL / Joern)

Requires: a confirmed/proven/exploitable finding in findings.json, and a built CodeQL DB or Joern CPG (/build-databases). For Semgrep, use /semgrep-rule instead.

Run node "${CLAUDE_PLUGIN_ROOT}/scripts/cmd/rule-synth-prepare.mjs" --target "<repo root>". If status is no-seeds (run /verify or /threat-hunt first) or no-engine (run /build-databases, or /semgrep-rule for Semgrep), report that and stop. Read prepPath.
For each seed, write a tight CodeQL .ql / Joern .sc for the recommendedEngine into the run dir, using the seed's seedFingerprint as seedRef. Joern scripts must open the CPG from KUZUSHI_CPG and print matches as KUZUSHI_MATCH\t<file>\t<line>. Write the { rules: [...] } bundle to the prep's draftPath.
Run the assembleCommand (finalize). It compiles each rule, checks it fires on the seed line, runs it across the repo, and caps it for precision — accepting only those that pass into the pack and promoting new matches as candidate findings. Report accepted/rejected per seed.