diff --git a/.githooks/pre-commit b/.githooks/pre-commit
index 48d0fc7..2a5db02 100755
--- a/.githooks/pre-commit
+++ b/.githooks/pre-commit
@@ -17,7 +17,15 @@ fail() { echo "pre-commit: $1" >&2; exit 1; }
 # merging main into a branch trips the hook on files nobody edited. Both
 # exclude forms are needed: a git pathspec's leading `**/` requires at least
 # one directory component, so it alone would miss a root-level `fixtures/`.
-added=$(git diff --cached -U0 -- '*.ts' '*.tsx' '*.js' '*.jsx' '*.mjs' ':(exclude)fixtures/**' ':(exclude)**/fixtures/**' | grep '^+[^+]' || true)
+#
+# .loopwright/ is excluded wholesale. In a host repo it is vendored code
+# nobody hand-edits, so policing it only ever fires on a re-vendor. In this
+# repo it is the engine, whose detector definitions necessarily spell out
+# every pattern they look for — grepping for those literals in the file that
+# declares them is a false positive by construction. Either way the gate
+# still scans it in CI, and the gate is the authority; this hook only exists
+# to deliver the same answer sooner.
+added=$(git diff --cached -U0 -- '*.ts' '*.tsx' '*.js' '*.jsx' '*.mjs' ':(exclude)fixtures/**' ':(exclude)**/fixtures/**' ':(exclude).loopwright/**' | grep '^+[^+]' || true)
 if [ -n "$added" ]; then
   declare -a patterns=(
     '\.only *\('            'a focused test (.only)'
diff --git a/.github/workflows/quality-gate.yml b/.github/workflows/quality-gate.yml
index 54b95cd..2d36856 100644
--- a/.github/workflows/quality-gate.yml
+++ b/.github/workflows/quality-gate.yml
@@ -29,6 +29,12 @@ jobs:
         with:
           fetch-depth: 0
 
+      # corepack activates the pnpm/yarn version pinned by the host's
+      # `packageManager` field. It is a no-op on an npm host, so it is
+      # unconditional rather than guarded on a lockfile.
+      - name: Enable corepack
+        run: corepack enable
+
       # cache: npm with a two-path cache-dependency-path stays valid even on a
       # host with no package-lock.json (e.g. a yarn/pnpm project): the second
       # path, .loopwright/package-lock.json, is always vendored and always
@@ -43,12 +49,22 @@ jobs:
             package-lock.json
             .loopwright/package-lock.json
 
+      # The collectors run the host's own binaries out of node_modules/.bin, so
+      # this step is what makes them resolve at all. Skipping it does not fail
+      # here — it fails later, as every collector reporting 'n/a', which reads
+      # like a broken gate rather than a missing install. Each branch uses the
+      # lockfile-respecting install for its package manager so CI matches the
+      # committed tree.
       - name: Install host dependencies
         run: |
-          if [ -f package-lock.json ]; then
+          if [ -f pnpm-lock.yaml ]; then
+            pnpm install --frozen-lockfile
+          elif [ -f yarn.lock ]; then
+            yarn install --immutable || yarn install --frozen-lockfile
+          elif [ -f package-lock.json ]; then
             npm ci
           else
-            echo "no package-lock.json — skipping host npm ci; install host deps in a preceding step if needed"
+            echo "no lockfile — skipping host install; install host deps in a preceding step if needed"
           fi
 
       - name: Install engine dependencies
diff --git a/.loopwright/config.default.json b/.loopwright/config.default.json
index 2d48fcb..ba306fb 100644
--- a/.loopwright/config.default.json
+++ b/.loopwright/config.default.json
@@ -41,14 +41,14 @@
       "onRegression": "block"
     },
     "lint.errors": {
-      "label": "ESLint errors",
+      "label": "Lint errors",
       "direction": "lower-better",
       "hardMax": 0,
       "tolerance": 0,
       "onRegression": "block"
     },
     "lint.warnings": {
-      "label": "ESLint warnings",
+      "label": "Lint warnings",
       "direction": "lower-better",
       "tolerance": 0,
       "onRegression": "block"
@@ -166,7 +166,7 @@
       "onRegression": "block"
     },
     "integrity.lintSuppressions": {
-      "label": "Inline eslint-disable",
+      "label": "Inline lint suppressions",
       "direction": "lower-better",
       "tolerance": 0,
       "onRegression": "warn"
diff --git a/.loopwright/config.json b/.loopwright/config.json
index 5e9d075..7d61609 100644
--- a/.loopwright/config.json
+++ b/.loopwright/config.json
@@ -4,7 +4,7 @@
   "collectors": {
     "typecheck":   { "adapter": "unconfigured" },
     "lint":        { "adapter": "eslint" },
-    "tests":       { "adapter": "vitest", "command": "npx vitest run --coverage", "cwd": ".loopwright" },
+    "tests":       { "adapter": "vitest", "command": "vitest run --coverage", "cwd": ".loopwright" },
     "audit":       { "adapter": "npm-audit" },
     "duplication": { "adapter": "jscpd" }
   },
@@ -47,14 +47,14 @@
       "onRegression": "block"
     },
     "lint.errors": {
-      "label": "ESLint errors",
+      "label": "Lint errors",
       "direction": "lower-better",
       "hardMax": 0,
       "tolerance": 0,
       "onRegression": "block"
     },
     "lint.warnings": {
-      "label": "ESLint warnings",
+      "label": "Lint warnings",
       "direction": "lower-better",
       "tolerance": 0,
       "onRegression": "block"
@@ -172,7 +172,7 @@
       "onRegression": "block"
     },
     "integrity.lintSuppressions": {
-      "label": "Inline eslint-disable",
+      "label": "Inline lint suppressions",
       "direction": "lower-better",
       "tolerance": 0,
       "onRegression": "warn"
diff --git a/.loopwright/scripts/adapters/biome.mjs b/.loopwright/scripts/adapters/biome.mjs
index 3f27925..5efb4dc 100644
--- a/.loopwright/scripts/adapters/biome.mjs
+++ b/.loopwright/scripts/adapters/biome.mjs
@@ -56,7 +56,7 @@ function writeLintReport(reportsDir, payload) {
 export default {
   name: 'biome',
   collector: 'lint',
-  defaultCommand: 'npx biome check --reporter=json .',
+  defaultCommand: 'biome check --reporter=json .',
   collect(ctx) {
     const { command, cwd, reportsDir, hostRoot } = ctx;
     const result = runShell(command, cwd);
diff --git a/.loopwright/scripts/adapters/eslint.mjs b/.loopwright/scripts/adapters/eslint.mjs
index ca98af6..2189bb5 100644
--- a/.loopwright/scripts/adapters/eslint.mjs
+++ b/.loopwright/scripts/adapters/eslint.mjs
@@ -58,7 +58,7 @@ export default {
   // --ignore-pattern excludes the vendored .loopwright/ layer: it ships its
   // own fixtures and reports that are not the host's code, so ESLint must
   // never traverse into it when run from the host's config.
-  defaultCommand: "npx eslint . --format json --ignore-pattern '.loopwright/**'",
+  defaultCommand: "eslint . --format json --ignore-pattern '.loopwright/**'",
   collect(ctx) {
     const { command, cwd, reportsDir, hostRoot } = ctx;
     const result = runShell(command, cwd);
diff --git a/.loopwright/scripts/adapters/jest.mjs b/.loopwright/scripts/adapters/jest.mjs
index 983f979..c9a913c 100644
--- a/.loopwright/scripts/adapters/jest.mjs
+++ b/.loopwright/scripts/adapters/jest.mjs
@@ -26,7 +26,7 @@ export default {
   name: 'jest',
   collector: 'tests',
   defaultCommand:
-    'npx jest --ci --json --outputFile=.loopwright/reports/test-results.json --coverage --coverageReporters=json-summary --coverageDirectory=.loopwright/reports/coverage',
+    'jest --ci --json --outputFile=.loopwright/reports/test-results.json --coverage --coverageReporters=json-summary --coverageDirectory=.loopwright/reports/coverage',
   collect(ctx) {
     const { command, cwd, reportsDir, hostRoot } = ctx;
     const result = runShell(command, cwd);
diff --git a/.loopwright/scripts/adapters/tsc.mjs b/.loopwright/scripts/adapters/tsc.mjs
index 4a62bbb..e2b1f6c 100644
--- a/.loopwright/scripts/adapters/tsc.mjs
+++ b/.loopwright/scripts/adapters/tsc.mjs
@@ -39,7 +39,7 @@ function writeTypecheckReport(reportsDir, payload) {
 export default {
   name: 'tsc',
   collector: 'typecheck',
-  defaultCommand: 'npx tsc --noEmit --pretty false',
+  defaultCommand: 'tsc --noEmit --pretty false',
   collect(ctx) {
     const { command, cwd, reportsDir } = ctx;
     const result = runShell(command, cwd);
diff --git a/.loopwright/scripts/adapters/vitest.mjs b/.loopwright/scripts/adapters/vitest.mjs
index b73f0c6..1c7c173 100644
--- a/.loopwright/scripts/adapters/vitest.mjs
+++ b/.loopwright/scripts/adapters/vitest.mjs
@@ -81,7 +81,7 @@ export default {
   name: 'vitest',
   collector: 'tests',
   defaultCommand:
-    'npx vitest run --coverage --coverage.reporter=json-summary --coverage.reportsDirectory=.loopwright/reports/coverage --reporter=default --reporter=json --outputFile.json=.loopwright/reports/test-results.json',
+    'vitest run --coverage --coverage.reporter=json-summary --coverage.reportsDirectory=.loopwright/reports/coverage --reporter=default --reporter=json --outputFile.json=.loopwright/reports/test-results.json',
   collect(ctx) {
     const { command, cwd, reportsDir, hostRoot } = ctx;
     const result = runShell(command, cwd);
diff --git a/.loopwright/scripts/lib/analyze-source.mjs b/.loopwright/scripts/lib/analyze-source.mjs
index 2a6caf2..8c3df66 100644
--- a/.loopwright/scripts/lib/analyze-source.mjs
+++ b/.loopwright/scripts/lib/analyze-source.mjs
@@ -43,7 +43,10 @@ const SUITE_CALLEES = new Set(['describe', 'xdescribe', 'fdescribe', 'suite']);
 
 const COVERAGE_IGNORE = /\b(?:istanbul|v8|c8|node:coverage)\s+ignore\b/;
 const TS_SUPPRESSION = /@ts-(?:ignore|nocheck|expect-error)\b/;
-const ESLINT_SUPPRESSION = /eslint-disable(?:-next-line|-line)?\b/;
+// Both linters loopwright supports, in one rule: an integrity metric that
+// only knows eslint reports a clean zero on a biome repo, which reads as
+// 'nobody suppressed anything' rather than 'this check cannot see anything'.
+const LINT_SUPPRESSION = /eslint-disable(?:-next-line|-line)?\b|biome-ignore(?:-start|-end)?\b/;
 const ASSERTION = /\b(?:expect|expectTypeOf|assert|should)\s*[.(]/;
 
 function isFunctionLike(node) {
@@ -157,7 +160,7 @@ function scanComments(text, filePath, findings) {
     const location = { file: filePath, line: index + 1, snippet: line.trim().slice(0, 120) };
     if (COVERAGE_IGNORE.test(line)) findings.coverageIgnores.push(location);
     if (TS_SUPPRESSION.test(line)) findings.typeSuppressions.push(location);
-    if (ESLINT_SUPPRESSION.test(line)) findings.lintSuppressions.push(location);
+    if (LINT_SUPPRESSION.test(line)) findings.lintSuppressions.push(location);
   });
 }
 
diff --git a/.loopwright/scripts/lib/shell.mjs b/.loopwright/scripts/lib/shell.mjs
index 8e26c48..ff732b3 100644
--- a/.loopwright/scripts/lib/shell.mjs
+++ b/.loopwright/scripts/lib/shell.mjs
@@ -13,7 +13,8 @@
  */
 import { spawnSync } from 'node:child_process';
 import { mkdirSync, writeFileSync } from 'node:fs';
-import { dirname, resolve } from 'node:path';
+import { delimiter, dirname, resolve } from 'node:path';
+import { HOST_ROOT } from './paths.mjs';
 
 export const REPORT_FILES = {
   typecheck: ['typecheck.json'],
@@ -23,8 +24,30 @@ export const REPORT_FILES = {
   duplication: ['jscpd/jscpd-report.json'],
 };
 
+/**
+ * Adapter commands name a bare binary (`tsc`, `vitest`, …) and rely on this
+ * PATH, rather than going through `npx`. npx falls through to the registry
+ * when a binary is not installed locally, so on a repo whose dependencies were
+ * never installed — or installed by a package manager the workflow did not
+ * recognise — `npx tsc` silently downloads `tsc`, an unrelated abandoned
+ * package that is not TypeScript, and the collector reports its nonsense as
+ * fact. Every package manager (npm, pnpm, yarn) populates node_modules/.bin,
+ * so resolving through it works for all three, and a genuinely missing tool
+ * fails with 'command not found' — which each adapter's TOOL_MISSING check
+ * already reports honestly.
+ *
+ * Both the host root and `cwd` contribute a bin directory: a collector may set
+ * `cwd` to a subdirectory with its own install (loopwright's own config points
+ * the tests collector at .loopwright/).
+ */
+function binPath(cwd) {
+  const dirs = [resolve(cwd, 'node_modules/.bin'), resolve(HOST_ROOT, 'node_modules/.bin')];
+  return [...new Set(dirs), process.env.PATH ?? ''].join(delimiter);
+}
+
 export function runShell(command, cwd, { maxBuffer = 64 * 1024 * 1024 } = {}) {
-  const result = spawnSync(command, { shell: true, cwd, encoding: 'utf8', maxBuffer });
+  const env = { ...process.env, PATH: binPath(cwd) };
+  const result = spawnSync(command, { shell: true, cwd, encoding: 'utf8', maxBuffer, env });
   // spawnSync reports a failure to run the command at all — the shell missing,
   // or output overflowing maxBuffer — on `error` rather than through the exit
   // status. Dropping it would leave the caller with a bare status 1 and empty
diff --git a/.loopwright/tests/analyze-source-extra.test.mjs b/.loopwright/tests/analyze-source-extra.test.mjs
index cc85fae..ec641b7 100644
--- a/.loopwright/tests/analyze-source-extra.test.mjs
+++ b/.loopwright/tests/analyze-source-extra.test.mjs
@@ -1,7 +1,7 @@
 import { describe, it, expect } from 'vitest';
 import { mkdtempSync, writeFileSync } from 'node:fs';
 import { tmpdir } from 'node:os';
-import { join } from 'node:path';
+import { dirname, join } from 'node:path';
 import { analyzeSources } from '../scripts/lib/analyze-source.mjs';
 
 function writeFixture(content) {
@@ -147,3 +147,34 @@ describe('empty catch detection', () => {
     expect(findings.emptyCatches).toHaveLength(1);
   });
 });
+
+// The bait lives in tests/fixtures/, which `sources.ignore` and the hook both
+// exclude: sources.roots covers this directory, so a suppression written out
+// in a test would be counted as a real one by the scanner under test.
+function suppressionsIn(name) {
+  const file = join(import.meta.dirname, 'fixtures', 'suppressions', name);
+  return analyzeSources([file], dirname(file)).findings.lintSuppressions;
+}
+
+describe('lint suppressions — both supported linters', () => {
+  it('counts an eslint suppression in each of its comment forms', () => {
+    expect(suppressionsIn('eslint-forms.mjs')).toHaveLength(3);
+  });
+
+  // Regression: this matched only one of the two linters loopwright supports,
+  // so a biome repo reported zero suppressions however many it carried — a
+  // check that cannot see anything reads exactly like nothing to see.
+  it('counts a biome suppression in each of its comment forms', () => {
+    expect(suppressionsIn('biome-forms.mjs')).toHaveLength(3);
+  });
+
+  it('reports the file and line of each suppression so the gate can cite it', () => {
+    const found = suppressionsIn('biome-forms.mjs');
+    expect(found.map((entry) => entry.line)).toEqual([1, 3, 5]);
+    expect(found[0].file).toBe('biome-forms.mjs');
+  });
+
+  it('leaves a file with no suppressions at zero', () => {
+    expect(suppressionsIn('clean.mjs')).toHaveLength(0);
+  });
+});
diff --git a/.loopwright/tests/fixtures/suppressions/biome-forms.mjs b/.loopwright/tests/fixtures/suppressions/biome-forms.mjs
new file mode 100644
index 0000000..1a7770e
--- /dev/null
+++ b/.loopwright/tests/fixtures/suppressions/biome-forms.mjs
@@ -0,0 +1,5 @@
+// biome-ignore lint/suspicious/noExplicitAny: fixture
+export const a = 1;
+// biome-ignore-start lint/style/useConst: fixture
+export const b = 2;
+// biome-ignore-end lint/style/useConst: fixture
diff --git a/.loopwright/tests/fixtures/suppressions/clean.mjs b/.loopwright/tests/fixtures/suppressions/clean.mjs
new file mode 100644
index 0000000..dffe990
--- /dev/null
+++ b/.loopwright/tests/fixtures/suppressions/clean.mjs
@@ -0,0 +1 @@
+export const a = 1; // an ordinary comment
diff --git a/.loopwright/tests/fixtures/suppressions/eslint-forms.mjs b/.loopwright/tests/fixtures/suppressions/eslint-forms.mjs
new file mode 100644
index 0000000..7d3ba3e
--- /dev/null
+++ b/.loopwright/tests/fixtures/suppressions/eslint-forms.mjs
@@ -0,0 +1,4 @@
+/* eslint-disable no-console */
+// eslint-disable-next-line no-alert
+const a = 1; // eslint-disable-line no-unused-vars
+export const b = a;
diff --git a/.loopwright/tests/shell.test.mjs b/.loopwright/tests/shell.test.mjs
index 3bdaa24..42144c1 100644
--- a/.loopwright/tests/shell.test.mjs
+++ b/.loopwright/tests/shell.test.mjs
@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { mkdtempSync, readFileSync } from 'node:fs';
+import { chmodSync, mkdirSync, mkdtempSync, readFileSync, writeFileSync } from 'node:fs';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 import { runShell, writeReport } from '../scripts/lib/shell.mjs';
@@ -31,6 +31,30 @@ describe('runShell', () => {
   });
 });
 
+describe('runShell binary resolution', () => {
+  // Regression: the adapters name bare binaries and rely on runShell putting
+  // node_modules/.bin on PATH. With npx, a repo whose deps were not installed
+  // resolved 'tsc' to an unrelated package off the registry instead of failing.
+  it('resolves a binary from the cwd node_modules/.bin', () => {
+    const dir = mkdtempSync(join(tmpdir(), 'lw-bin-'));
+    mkdirSync(join(dir, 'node_modules/.bin'), { recursive: true });
+    const bin = join(dir, 'node_modules/.bin/lw-fake-tool');
+    writeFileSync(bin, '#!/bin/sh\necho resolved-locally\n');
+    chmodSync(bin, 0o755);
+
+    const result = runShell('lw-fake-tool', dir);
+    expect(result.status).toBe(0);
+    expect(result.stdout.trim()).toBe('resolved-locally');
+  });
+
+  it('fails loudly when a binary is absent instead of resolving it elsewhere', () => {
+    const dir = mkdtempSync(join(tmpdir(), 'lw-bin-'));
+    const result = runShell('lw-definitely-not-installed', dir);
+    expect(result.status).not.toBe(0);
+    expect(result.stderr).toMatch(/not found/i);
+  });
+});
+
 describe('writeReport', () => {
   it('creates nested directories and writes pretty JSON with a trailing newline', () => {
     const dir = mkdtempSync(join(tmpdir(), 'lw-shell-'));
diff --git a/README.md b/README.md
index fa6e779..a49349a 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,7 @@ they're absent, and never touches your `config.json` or `baseline.json`. Your
 stack stays yours: loopwright owns `.loopwright/` and nothing else.
 
 **Or use this repo as a template** if you'd rather own the layer itself — you
-get the engine, its 146 tests and its docs as a starting point to modify. Point
+get the engine, its 148 tests and its docs as a starting point to modify. Point
 `sources.roots` in `.loopwright/config.json` at your code and re-baseline.
 
 ## Your stack, not loopwright's
@@ -108,6 +108,20 @@ is not a way to pass the gate.
 A tool that's configured but can't run writes `{ok: false, error}` and **blocks**.
 Infrastructure failure must never look like success.
 
+### Package managers
+
+npm, pnpm and yarn all work. Adapters invoke bare binaries (`tsc`, `vitest`, …)
+and the engine resolves them from your `node_modules/.bin` — never through
+`npx`, which falls back to the registry and will happily download an unrelated
+package of the same name when your dependencies aren't installed. The CI
+workflow installs host dependencies with whichever package manager your lockfile
+names.
+
+`audit` is the one collector that is npm-only: `pnpm audit --json` and
+`yarn npm audit` emit a different report shape than `npm-audit` parses, so on a
+pnpm or yarn host the detector leaves `audit` **unconfigured** rather than
+wiring an adapter that would silently report zero advisories.
+
 ## The loop
 
 The gate is the enforcement half. The other half is how work reaches it:
@@ -157,6 +171,7 @@ authoritative verdict.
 ## Requirements
 
 - Node ≥ 20.11 and a `package.json` (loopwright targets JS/TS repos)
+- npm, pnpm or yarn — the engine and its CI workflow detect which from your lockfile
 - [`gh`](https://cli.github.com), authenticated
 - [Claude Code](https://claude.com/claude-code) locally, and the
   [Claude GitHub App](https://github.com/apps/claude) on the repo for the
@@ -165,7 +180,7 @@ authoritative verdict.
 ## This repo runs on itself
 
 The engine that ships to your repo lives here under `.loopwright/scripts/`,
-covered by 146 tests in `.loopwright/tests/`, gated by the same workflow that
+covered by 148 tests in `.loopwright/tests/`, gated by the same workflow that
 will gate your PRs — baseline, integrity metrics and all. If the gate is wrong,
 it's wrong here first.