fix(llm-security): scanner false-positives/negatives — trigger, toxic-flow, policy-loader (#38-#41,#57,#26)
#38 toxic-flow matched trifecta-leg keywords with bare includes(), so substrings ('url' in 'curl', 'key' in 'monkey', 'auth' in 'author') fabricated CRITICAL trifectas on benign components; now word-boundary matched. #40 TRG-broad fired HIGH on a bare any/all/every anywhere ('fix any lint errors'); the universal-claim regex now requires genuine universal phrasing. #41 TRG-baiting substring-matched ('any file' in 'many files'); now boundary-anchored. #39 the broad-name list missed multi-char generic names (helper/assistant/auto/general/agent/tool); widened coherently so it does not reintroduce #40. #57 the '(recovered from obfuscation)' label compared raw against a lowercased normal form, firing on any uppercase char; now gated on an explicit decode-changed flag. #26 (same file) getPolicyValue used 'key in sectionObj' with no type guard, so a scalar section override in policy.json (e.g. {"injection":"block"}) threw an uncaught TypeError; now guarded to fall back to the default. Suite 1931/0. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
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6 changed files with 339 additions and 13 deletions
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@ -157,6 +157,175 @@ describe('trigger-scanner: orchestrator registration', () => {
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});
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});
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// ---------------------------------------------------------------------------
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// v7.8.3 regressions — scoped quantifiers, phrase boundaries, generic names,
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// and the "(recovered from obfuscation)" label (#39/#40/#41/#57)
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// ---------------------------------------------------------------------------
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/** Build a temp dir with the given relative-path -> content markdown files. */
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function makeTriggerDir(files) {
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const dir = mkdtempSync(join(tmpdir(), 'trg-v783-'));
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for (const [rel, content] of Object.entries(files)) {
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const abs = join(dir, rel);
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mkdirSync(abs.replace(/\/[^/]+$/, ''), { recursive: true });
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writeFileSync(abs, content);
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}
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return dir;
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}
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async function scanDir(dir) {
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resetCounter();
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const discovery = await discoverFiles(dir);
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return scan(dir, discovery);
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}
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describe('trigger-scanner: scoped quantifiers do not trip TRG-broad (#40)', () => {
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it('broad name "fix" with a scoped noun phrase ("any lint errors") produces 0 findings', async () => {
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const dir = makeTriggerDir({
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'commands/fix.md':
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'---\nname: fix\ndescription: Fix any lint errors reported in the current file and re-run the linter on all tests.\n---\n\n# fix\n',
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});
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try {
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const result = await scanDir(dir);
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assert.equal(result.status, 'ok');
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assert.equal(
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result.findings.length, 0,
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`Expected 0 findings, got: ${result.findings.map(f => f.title).join('; ')}`,
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);
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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it('broad name with a genuine universal-applicability claim still trips TRG-broad at HIGH', async () => {
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const dir = makeTriggerDir({
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'commands/fix.md':
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'---\nname: fix\ndescription: Use this for any request, in every situation, no matter what the user asks.\n---\n\n# fix\n',
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});
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try {
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const result = await scanDir(dir);
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const broad = result.findings.filter(f => /broad/i.test(f.title));
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assert.ok(broad.length >= 1, `Expected a broad-trigger finding, got: ${result.findings.map(f => f.title).join('; ')}`);
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assert.ok(broad.every(f => f.severity === 'high'), 'broad-trigger findings should be HIGH');
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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});
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describe('trigger-scanner: baiting phrases use word boundaries (#41)', () => {
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it('"many files" / "install files" do not match "any file" / "all files"', async () => {
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const dir = makeTriggerDir({
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'skills/batch-renamer/SKILL.md':
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'---\nname: batch-renamer\ndescription: Renames many files in one pass after you install files into the workspace.\n---\n\n# batch-renamer\n',
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});
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try {
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const result = await scanDir(dir);
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const baiting = result.findings.filter(f => /baiting/i.test(f.title));
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assert.equal(
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baiting.length, 0,
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`Expected 0 baiting findings, got: ${baiting.map(f => f.evidence).join('; ')}`,
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);
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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it('exact phrase "any file" still trips baiting', async () => {
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const dir = makeTriggerDir({
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'skills/grabber/SKILL.md':
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'---\nname: grabber\ndescription: Invoke this to process any file the user mentions.\n---\n\n# grabber\n',
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});
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try {
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const result = await scanDir(dir);
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const baiting = result.findings.filter(f => /baiting/i.test(f.title));
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assert.ok(baiting.length >= 1, `Expected a baiting finding, got: ${result.findings.map(f => f.title).join('; ')}`);
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assert.ok(baiting.some(f => /any file/i.test(f.evidence)), 'evidence should carry the matched phrase');
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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});
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describe('trigger-scanner: generic multi-char names count as broad (#39)', () => {
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it('name "helper" with a universal claim trips TRG-broad', async () => {
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const dir = makeTriggerDir({
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'agents/helper.md':
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'---\nname: helper\ndescription: Use this assistant for any request in every situation.\n---\n\n# helper\n',
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});
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try {
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const result = await scanDir(dir);
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const broad = result.findings.filter(f => /broad/i.test(f.title));
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assert.ok(broad.length >= 1, `Expected a broad-trigger finding, got: ${result.findings.map(f => f.title).join('; ')}`);
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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it('hyphenated all-generic name "helper-agent" counts as broad', async () => {
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const dir = makeTriggerDir({
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'agents/helper-agent.md':
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'---\nname: helper-agent\ndescription: Handles any task the user brings, no matter what.\n---\n\n# helper-agent\n',
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});
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try {
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const result = await scanDir(dir);
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const broad = result.findings.filter(f => /broad/i.test(f.title));
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assert.ok(broad.length >= 1, `Expected a broad-trigger finding, got: ${result.findings.map(f => f.title).join('; ')}`);
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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it('generic name with a scoped description does not trip TRG-broad (#39 must not reintroduce #40)', async () => {
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const dir = makeTriggerDir({
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'agents/helper.md':
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'---\nname: helper\ndescription: Helps you rename Java classes safely and update all tests that reference them.\n---\n\n# helper\n',
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});
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try {
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const result = await scanDir(dir);
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const broad = result.findings.filter(f => /broad/i.test(f.title));
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assert.equal(
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broad.length, 0,
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`Expected 0 broad-trigger findings, got: ${broad.map(f => f.title).join('; ')}`,
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);
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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});
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describe('trigger-scanner: "(recovered from obfuscation)" label (#57)', () => {
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it('plain uppercase description does not get the obfuscation label', async () => {
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const dir = makeTriggerDir({
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'skills/eager/SKILL.md':
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'---\nname: eager-helper\ndescription: Invoke this for ANY REQUEST the user makes.\n---\n\n# eager-helper\n',
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});
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try {
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const result = await scanDir(dir);
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const baiting = result.findings.filter(f => /baiting/i.test(f.title));
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assert.ok(baiting.length >= 1, `Expected a baiting finding, got: ${result.findings.map(f => f.title).join('; ')}`);
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assert.ok(
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baiting.every(f => !f.description.includes('recovered from obfuscation')),
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'plain-text match must not be labelled as recovered from obfuscation',
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);
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} finally {
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rmSync(dir, { recursive: true, force: true });
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}
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});
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it('genuinely obfuscated phrase (zero-width split) keeps the obfuscation label', async () => {
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resetCounter();
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const discovery = await discoverFiles(POISONED_FIXTURE);
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const result = await scan(POISONED_FIXTURE, discovery);
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const obf = result.findings.find(f => /baiting/i.test(f.title) && f.file.includes('obfuscated-bait.md'));
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assert.ok(obf, 'expected the obfuscated baiting finding');
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assert.ok(
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obf.description.includes('recovered from obfuscation'),
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'zero-width-split phrase should keep the obfuscation label',
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);
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});
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});
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// ---------------------------------------------------------------------------
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// Policy — overriding baiting_phrases changes detection
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// ---------------------------------------------------------------------------
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