diff --git a/.github/actions/scripts/run-utp-tests.sh b/.github/actions/scripts/run-utp-tests.sh
index 892cfdf..c9e1d02 100755
--- a/.github/actions/scripts/run-utp-tests.sh
+++ b/.github/actions/scripts/run-utp-tests.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -uo pipefail
+set -euo pipefail
 
 _UTP_HELPERS="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/utp-ci-assertion-helpers.sh"
 # shellcheck source=utp-ci-assertion-helpers.sh
@@ -23,28 +23,26 @@ fi
 
 IFS=',' read -ra tests <<< "$TESTS_INPUT"
 failures=0
+scenarios_run=0
 
-declare -A known_tests=(
-  [CompilerWarnings]=1
-  [CompilerErrors]=1
-  [BuildWarnings]=1
-  [BuildErrors]=1
-  [PlaymodeTestsErrors]=1
-  [EditmodeTestsErrors]=1
-  [EditmodeTestsPassing]=1
-  [EditmodeTestsSkipped]=1
-  [PlaymodeTestsPassing]=1
-  [PlaymodeTestsSkipped]=1
-  [EditmodeSuite]=1
-  [PlaymodeSuite]=1
-)
+# Bash 3.2-safe (macOS /bin/bash): avoid declare -A with unquoted keys under set -u.
+is_known_utp_test() {
+  case "$1" in
+    CompilerWarnings|CompilerErrors|BuildWarnings|BuildErrors|PlaymodeTestsErrors|EditmodeTestsErrors|EditmodeTestsPassing|EditmodeTestsSkipped|PlaymodeTestsPassing|PlaymodeTestsSkipped|EditmodeSuite|PlaymodeSuite)
+      return 0
+      ;;
+    *)
+      return 1
+      ;;
+  esac
+}
 
 effective_tests=0
 declare -a selected_tests=()
 for raw_test in "${tests[@]}"; do
   tname="$(echo "$raw_test" | xargs)"
   if [ -n "$tname" ] && [ "$tname" != "None" ]; then
-    if [ -z "${known_tests[$tname]+x}" ]; then
+    if ! is_known_utp_test "$tname"; then
       echo "::error::TESTS_INPUT includes unknown test selection '$tname'"
       exit 1
     fi
@@ -110,6 +108,8 @@ for raw_test in "${tests[@]}"; do
     continue
   fi
 
+  scenarios_run=$((scenarios_run + 1))
+
   src="$GITHUB_WORKSPACE/unity-tests/${test_name}.cs"
   is_suite=0
   case "$test_name" in
@@ -386,6 +386,23 @@ for raw_test in "${tests[@]}"; do
 
 done
 
+if [ "$scenarios_run" -eq 0 ]; then
+  echo "::error::No UTP scenarios were executed (harness aborted or empty selection)"
+  exit 1
+fi
+
+utp_log_count=0
+if [ -d "$UNITY_PROJECT_PATH/Builds/Logs" ]; then
+  utp_log_count=$(find "$UNITY_PROJECT_PATH/Builds/Logs" -maxdepth 1 -type f -name '*-utp-json.log' 2>/dev/null | wc -l | tr -d ' ')
+fi
+if [ "${utp_log_count:-0}" -eq 0 ] && [ -d "${GITHUB_WORKSPACE:-}/utp-artifacts" ]; then
+  utp_log_count=$(find "$GITHUB_WORKSPACE/utp-artifacts" -type f -name '*-utp-json.log' 2>/dev/null | wc -l | tr -d ' ')
+fi
+if [ "${utp_log_count:-0}" -eq 0 ]; then
+  echo "::error::No *-utp-json.log artifacts were produced after ${scenarios_run} scenario(s) — treating as harness failure"
+  exit 1
+fi
+
 if [ "$failures" -gt 0 ]; then
   echo "::error::One or more tests did not meet expectations ($failures)"
   exit 1
diff --git a/.github/actions/scripts/utp-ci-assertion-helpers.sh b/.github/actions/scripts/utp-ci-assertion-helpers.sh
index 004c34f..888faff 100644
--- a/.github/actions/scripts/utp-ci-assertion-helpers.sh
+++ b/.github/actions/scripts/utp-ci-assertion-helpers.sh
@@ -1,6 +1,20 @@
 #!/usr/bin/env bash
 # Shared helpers for UTP CI batch validation (.github/actions/scripts/run-utp-tests.sh).
 # Keep behavior in sync with contract tests: tests/run-utp-tests-contract.sh
+#
+# Severity checks go through utp-file-has-actionable-severity.cjs → normalizeTelemetryEntry
+# so benign Unity noise (multicast WSAEACCES, OpenCL, StackAllocator, etc.) is remapped
+# before Error/Exception/Assert are treated as failures. Do not re-special-case messages here.
+
+_UTP_ASSERT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+_UTP_ACTIONABLE_SEVERITY_JS="${_UTP_ASSERT_DIR}/utp-file-has-actionable-severity.cjs"
+
+# Returns 0 if the UTP file has an actionable Error/Exception/(optional Assert) after normalize.
+utp_file_has_actionable_severity() {
+  local utp_file="$1"
+  local severities_re="$2"
+  node "$_UTP_ACTIONABLE_SEVERITY_JS" "$utp_file" "$severities_re"
+}
 
 # Returns 0 (true) if this UTP JSON log should fail an *expected-success* scenario.
 utp_signals_failure_for_expected_success() {
@@ -9,18 +23,18 @@ utp_signals_failure_for_expected_success() {
   case "$test_name" in
     CompilerWarnings|BuildWarnings)
       # Engine / allocator assert telemetry is common here; only treat Error/Exception as hard failures.
-      grep -qi '"severity"[[:space:]]*:[[:space:]]*"\(Error\|Exception\)"' "$utp_file" 2>/dev/null
+      utp_file_has_actionable_severity "$utp_file" 'Error|Exception'
       ;;
     *)
-      grep -qi '"severity"[[:space:]]*:[[:space:]]*"\(Error\|Exception\|Assert\)"' "$utp_file" 2>/dev/null
+      utp_file_has_actionable_severity "$utp_file" 'Error|Exception|Assert'
       ;;
   esac
 }
 
-# Returns 0 if UTP log contains any Error/Exception/Assert (used for expected-failure scenarios).
+# Returns 0 if UTP log contains any actionable Error/Exception/Assert (expected-failure scenarios).
 utp_signals_any_severity_problem() {
   local utp_file="$1"
-  grep -qi '"severity"[[:space:]]*:[[:space:]]*"\(Error\|Exception\|Assert\)"' "$utp_file" 2>/dev/null
+  utp_file_has_actionable_severity "$utp_file" 'Error|Exception|Assert'
 }
 
 # Prints first path to an NUnit results file containing <test-case>, or nothing.
diff --git a/.github/actions/scripts/utp-file-has-actionable-severity.cjs b/.github/actions/scripts/utp-file-has-actionable-severity.cjs
new file mode 100644
index 0000000..65cda11
--- /dev/null
+++ b/.github/actions/scripts/utp-file-has-actionable-severity.cjs
@@ -0,0 +1,69 @@
+/**
+ * CI helper: parse a *-utp-json.log (pretty JSON array from unity-cli, or NDJSON fixtures)
+ * through normalizeTelemetryEntry so benign elevated severities are remapped, then exit 0
+ * if any remaining severity is in the requested set.
+ *
+ * Usage: node utp-file-has-actionable-severity.cjs <file> [Error|Exception|Assert]
+ * Exit 0 = has actionable severity; exit 1 = none; exit 2 = usage/IO/parse error.
+ *
+ * Requires `npm run build` so dist/utp.js exists (same as scan-utp-artifacts.cjs).
+ */
+const fs = require('fs');
+const path = require('path');
+
+const repoRoot = path.join(__dirname, '..', '..', '..');
+const distUtp = path.join(repoRoot, 'dist', 'utp.js');
+if (!fs.existsSync(distUtp)) {
+    console.error(`utp-file-has-actionable-severity: missing ${distUtp} (run npm run build)`);
+    process.exit(2);
+}
+
+const { normalizeTelemetryEntry } = require(distUtp);
+
+const filePath = process.argv[2];
+const severitiesArg = process.argv[3] || 'Error|Exception|Assert';
+if (!filePath) {
+    console.error('Usage: node utp-file-has-actionable-severity.cjs <file> [Error|Exception|Assert]');
+    process.exit(2);
+}
+
+const severitySet = new Set(severitiesArg.split('|').map(s => s.trim()).filter(Boolean));
+
+function loadEntries(raw) {
+    const trimmed = raw.trim();
+    if (!trimmed) {
+        return [];
+    }
+    try {
+        const data = JSON.parse(trimmed);
+        return Array.isArray(data) ? data : [data];
+    } catch {
+        // NDJSON / one compact object per line (contract fixtures)
+        const out = [];
+        for (const line of trimmed.split(/\r?\n/)) {
+            const t = line.trim();
+            if (!t) {
+                continue;
+            }
+            out.push(JSON.parse(t));
+        }
+        return out;
+    }
+}
+
+let entries;
+try {
+    entries = loadEntries(fs.readFileSync(filePath, 'utf8'));
+} catch (err) {
+    console.error(`utp-file-has-actionable-severity: ${err.message || err}`);
+    process.exit(2);
+}
+
+for (const entry of entries) {
+    const { utp } = normalizeTelemetryEntry(entry);
+    if (utp && utp.severity && severitySet.has(String(utp.severity))) {
+        process.exit(0);
+    }
+}
+
+process.exit(1);
diff --git a/.github/scripts/unity-release-discovery.cjs b/.github/scripts/unity-release-discovery.cjs
new file mode 100644
index 0000000..6c5d87e
--- /dev/null
+++ b/.github/scripts/unity-release-discovery.cjs
@@ -0,0 +1,234 @@
+/**
+ * Weekly Unity release discovery: compare Releases API tips to CI matrix + canary pin.
+ * Usage: node .github/scripts/unity-release-discovery.cjs
+ * Env: GITHUB_STEP_SUMMARY (optional), OPEN_ISSUE=1 + GH_TOKEN/GITHUB_TOKEN to open/update drift issue.
+ */
+const fs = require('fs');
+const path = require('path');
+const { execFileSync } = require('child_process');
+
+const repoRoot = path.join(__dirname, '..', '..');
+const apiBase = 'https://services.api.unity.com/unity/editor/release/v1/releases';
+const minors = ['6000.0', '6000.1', '6000.2', '6000.3', '6000.4', '6000.5', '6000.6', '6000.7'];
+const ISSUE_TITLE = 'unity-release-drift: matrix / canary vs Unity Releases API';
+const ISSUE_LABEL = 'unity-release-drift';
+
+async function fetchLatest(versionPrefix) {
+    const url = `${apiBase}?version=${encodeURIComponent(versionPrefix)}&limit=10`;
+    const res = await fetch(url);
+    if (!res.ok) {
+        throw new Error(`Releases API ${res.status} for ${versionPrefix}`);
+    }
+    const data = await res.json();
+    const results = Array.isArray(data.results) ? data.results : [];
+    return results.map(r => ({
+        version: r.version,
+        stream: r.stream,
+        shortRevision: r.shortRevision,
+        releaseDate: r.releaseDate,
+    }));
+}
+
+function loadMatrixVersions() {
+    const buildOptions = JSON.parse(
+        fs.readFileSync(path.join(repoRoot, '.github', 'workflows', 'build-options.json'), 'utf8')
+    );
+    return buildOptions['unity-version'] || [];
+}
+
+function loadCanaryPin() {
+    const yml = fs.readFileSync(
+        path.join(repoRoot, '.github', 'workflows', 'unity-preview-canary.yml'),
+        'utf8'
+    );
+    const version = (yml.match(/"unity-version":\s*"([^"]+)"/) || [])[1];
+    const changeset = (yml.match(/"changeset":\s*"([^"]+)"/) || [])[1];
+    const channel = (yml.match(/"channel":\s*"([^"]+)"/) || [])[1];
+    return { version, changeset, channel };
+}
+
+function pickTip(rows, preferStreams) {
+    for (const stream of preferStreams) {
+        const hit = rows.find(r => String(r.stream).toUpperCase() === stream);
+        if (hit) return hit;
+    }
+    return rows[0];
+}
+
+async function main() {
+    const matrixVersions = loadMatrixVersions();
+    const canary = loadCanaryPin();
+    const tips = [];
+
+    for (const minor of minors) {
+        try {
+            const rows = await fetchLatest(minor);
+            const tip = pickTip(rows, ['LTS', 'SUPPORTED', 'BETA', 'ALPHA']);
+            tips.push({ minor, tip, count: rows.length });
+        } catch (err) {
+            tips.push({ minor, tip: null, error: err.message });
+        }
+    }
+
+    const lines = [];
+    lines.push('## Unity release discovery');
+    lines.push('');
+    lines.push('### Blocking matrix (`build-options.json`)');
+    lines.push('');
+    for (const v of matrixVersions) {
+        lines.push(`- \`${v}\``);
+    }
+    lines.push('');
+    lines.push('### Preview canary pin');
+    lines.push('');
+    lines.push(`- version: \`${canary.version || 'n/a'}\``);
+    lines.push(`- changeset: \`${canary.changeset || 'n/a'}\``);
+    lines.push(`- channel: \`${canary.channel || 'n/a'}\``);
+    lines.push('');
+    lines.push('### API tips by minor');
+    lines.push('');
+    lines.push('| Minor | Tip version | Stream | Changeset |');
+    lines.push('|-------|-------------|--------|-----------|');
+    for (const row of tips) {
+        if (!row.tip) {
+            lines.push(`| ${row.minor} | _(error)_ | | ${row.error || ''} |`);
+            continue;
+        }
+        lines.push(
+            `| ${row.minor} | ${row.tip.version} | ${row.tip.stream} | ${row.tip.shortRevision} |`
+        );
+    }
+    lines.push('');
+
+    const drifts = [];
+    const tip60006 = tips.find(t => t.minor === '6000.6')?.tip;
+    if (tip60006 && canary.version && tip60006.version !== canary.version) {
+        drifts.push(
+            `Canary pin ${canary.version} is behind API tip ${tip60006.version} (${tip60006.stream}, ${tip60006.shortRevision}).`
+        );
+    }
+    for (const row of tips) {
+        if (!row.tip) continue;
+        const stream = String(row.tip.stream || '').toUpperCase();
+        if (stream !== 'LTS' && stream !== 'SUPPORTED') continue;
+        const minorKey = row.minor; // e.g. 6000.5
+        const covered = matrixVersions.some(v => {
+            if (v === minorKey) return true;
+            if (v.startsWith(minorKey + '.')) return true;
+            if (v === `${minorKey}.x` || v === `${minorKey}.*`) return true;
+            // 6000.0.x style
+            const m = /^(\d+\.\d+)/.exec(v);
+            return m && m[1] === minorKey;
+        });
+        if (!covered && !matrixVersions.includes(row.tip.version)) {
+            drifts.push(
+                `New ${stream} tip ${row.tip.version} for ${minorKey} is not represented in blocking matrix.`
+            );
+        }
+    }
+
+    if (drifts.length === 0) {
+        lines.push('### Drift');
+        lines.push('');
+        lines.push('No matrix/canary drift detected against API tips.');
+    } else {
+        lines.push('### Drift');
+        lines.push('');
+        for (const d of drifts) {
+            lines.push(`- ${d}`);
+        }
+    }
+
+    const body = lines.join('\n');
+    console.log(body);
+
+    // Step summary: local matrix/canary + drift count only (no HTTP-tainted API tip fields).
+    if (process.env.GITHUB_STEP_SUMMARY) {
+        const summaryPath = path.resolve(process.env.GITHUB_STEP_SUMMARY);
+        const runnerTemp = process.env.RUNNER_TEMP ? path.resolve(process.env.RUNNER_TEMP) : '';
+        const underTemp =
+            runnerTemp &&
+            (summaryPath === runnerTemp || summaryPath.startsWith(runnerTemp + path.sep));
+        if (underTemp || process.env.GITHUB_ACTIONS === 'true') {
+            const localSummary = [
+                '## Unity release discovery',
+                '',
+                '### Blocking matrix (`build-options.json`)',
+                '',
+                ...matrixVersions.map(v => `- \`${v}\``),
+                '',
+                '### Preview canary pin',
+                '',
+                `- version: \`${canary.version || 'n/a'}\``,
+                `- changeset: \`${canary.changeset || 'n/a'}\``,
+                `- channel: \`${canary.channel || 'n/a'}\``,
+                '',
+                '### Drift',
+                '',
+                drifts.length === 0
+                    ? 'No matrix/canary drift detected against API tips.'
+                    : `${drifts.length} drift item(s) detected. See the job log for API tip details.`,
+                '',
+            ].join('\n');
+            fs.appendFileSync(summaryPath, localSummary);
+        }
+    }
+
+    if (process.env.OPEN_ISSUE === '1' && drifts.length > 0) {
+        const token = process.env.GH_TOKEN || process.env.GITHUB_TOKEN;
+        if (!token) {
+            console.error('OPEN_ISSUE=1 but no GH_TOKEN/GITHUB_TOKEN');
+            process.exitCode = 1;
+            return;
+        }
+        try {
+            const existing = execFileSync(
+                'gh',
+                ['issue', 'list', '--label', ISSUE_LABEL, '--state', 'open', '--json', 'number,title', '--limit', '5'],
+                { encoding: 'utf8' }
+            );
+            const issues = JSON.parse(existing || '[]');
+            const hit = issues.find(i => i.title === ISSUE_TITLE);
+            const issueBody = [
+                'Automated drift report from `unity-release-discovery`.',
+                '',
+                ...drifts.map(d => `- ${d}`),
+                '',
+                body,
+            ].join('\n');
+            try {
+                execFileSync('gh', ['label', 'create', ISSUE_LABEL, '--force'], { stdio: 'ignore' });
+            } catch {
+                // label may already exist or lack permission; issue create can omit it
+            }
+            if (hit) {
+                execFileSync('gh', ['issue', 'comment', String(hit.number), '--body', issueBody], {
+                    stdio: 'inherit',
+                });
+                console.log(`Updated issue #${hit.number}`);
+            } else {
+                try {
+                    execFileSync(
+                        'gh',
+                        ['issue', 'create', '--title', ISSUE_TITLE, '--label', ISSUE_LABEL, '--body', issueBody],
+                        { stdio: 'inherit' }
+                    );
+                } catch {
+                    execFileSync(
+                        'gh',
+                        ['issue', 'create', '--title', ISSUE_TITLE, '--body', issueBody],
+                        { stdio: 'inherit' }
+                    );
+                }
+            }
+        } catch (err) {
+            console.error(`Issue upsert failed: ${err.message || err}`);
+            process.exitCode = 1;
+        }
+    }
+}
+
+main().catch(err => {
+    console.error(err);
+    process.exit(1);
+});
diff --git a/.github/workflows/build-options.json b/.github/workflows/build-options.json
index 3d4812c..9178fb3 100644
--- a/.github/workflows/build-options.json
+++ b/.github/workflows/build-options.json
@@ -18,8 +18,7 @@
     "6000.2",
     "6000.3",
     "6000.4",
-    "6000.5",
-    "6000.6"
+    "6000.5"
   ],
   "include": [
     {
diff --git a/.github/workflows/integration-tests.yml b/.github/workflows/integration-tests.yml
index 776b545..469d69b 100644
--- a/.github/workflows/integration-tests.yml
+++ b/.github/workflows/integration-tests.yml
@@ -17,6 +17,12 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '24'
+          cache: npm
+      - run: npm ci
+      - run: npm run build
       - name: UTP batch assertion helpers (contract)
         run: bash tests/run-utp-tests-contract.sh
   setup:
diff --git a/.github/workflows/unity-build.yml b/.github/workflows/unity-build.yml
index f85dda1..1f5192b 100644
--- a/.github/workflows/unity-build.yml
+++ b/.github/workflows/unity-build.yml
@@ -66,13 +66,30 @@ jobs:
             exit 1
           fi
           if [ "${{ matrix.unity-version }}" != "none" ]; then
-            unity-cli setup-unity --unity-version "${{ matrix.unity-version }}" --build-targets "${{ matrix.build-target }}" --json
+            setup_cmd=(
+              unity-cli setup-unity
+              --unity-version "${{ matrix.unity-version }}"
+              --build-targets "${{ matrix.build-target }}"
+              --json
+            )
+            CHANNEL="${{ matrix.channel }}"
+            CHANGESET="${{ matrix.changeset }}"
+            if [ -n "${CHANNEL}" ]; then
+              setup_cmd+=(--channel "${CHANNEL}")
+            fi
+            if [ -n "${CHANGESET}" ]; then
+              setup_cmd+=(--changeset "${CHANGESET}")
+            fi
+            "${setup_cmd[@]}"
           fi
       - name: Verify UNITY_HUB_PATH and UNITY_EDITOR_PATH variables
         run: |
           echo "UNITY_HUB_PATH: ${UNITY_HUB_PATH}"
           echo "UNITY_EDITOR_PATH: ${UNITY_EDITOR_PATH}"
           echo "UNITY_PROJECT_PATH: ${UNITY_PROJECT_PATH}" # Expected to be empty at this point
+          echo "UNITY_EDITOR_VERSION: ${UNITY_EDITOR_VERSION:-}"
+          echo "UNITY_EDITOR_CHANGESET: ${UNITY_EDITOR_CHANGESET:-}"
+          echo "UNITY_EDITOR_CHANNELS: ${UNITY_EDITOR_CHANNELS:-}"
 
           if [ -z "${UNITY_HUB_PATH}" ]; then
             echo "::error::UNITY_HUB_PATH is not set"
@@ -83,6 +100,17 @@ jobs:
             echo "::error::UNITY_EDITOR_PATH is not set"
             exit 1
           fi
+
+          if [ "${{ matrix.unity-version }}" != "none" ]; then
+            {
+              echo "### Resolved Unity editor"
+              echo ""
+              echo "- version: \`${UNITY_EDITOR_VERSION:-n/a}\`"
+              echo "- changeset: \`${UNITY_EDITOR_CHANGESET:-n/a}\`"
+              echo "- channels: \`${UNITY_EDITOR_CHANNELS:-f}\`"
+              echo "- path: \`${UNITY_EDITOR_PATH:-n/a}\`"
+            } >> "$GITHUB_STEP_SUMMARY"
+          fi
       - name: Activate License
         if: ${{ matrix.unity-version != 'none' }}
         run: |
@@ -183,7 +211,7 @@ jobs:
         run: |
           set -euo pipefail
           # Keep this alternation in sync with hard failures from .github/actions/scripts/run-utp-tests.sh
-          failure_markers='One or more tests did not meet expectations|was expected to succeed but failed|produced UTP errors but was expected to succeed'
+          failure_markers='One or more tests did not meet expectations|was expected to succeed but failed|produced UTP errors but was expected to succeed|No \*-utp-json.log artifacts were produced|No UTP scenarios were executed'
           log_dir="${UNITY_PROJECT_PATH}/Builds/Logs"
           artifacts_dir="${GITHUB_WORKSPACE}/utp-artifacts"
 
@@ -212,6 +240,18 @@ jobs:
             fi
           fi
 
+          utp_count=0
+          if [ -d "$log_dir" ]; then
+            utp_count=$(find "$log_dir" -maxdepth 1 -type f -name '*-utp-json.log' 2>/dev/null | wc -l | tr -d ' ')
+          fi
+          if [ "${utp_count:-0}" -eq 0 ] && [ -d "$artifacts_dir" ]; then
+            utp_count=$(find "$artifacts_dir" -type f -name '*-utp-json.log' 2>/dev/null | wc -l | tr -d ' ')
+          fi
+          if [ "${utp_count:-0}" -eq 0 ]; then
+            echo "::error::RUN_BUILD=true but no *-utp-json.log found under Logs or utp-artifacts (possible false-green / harness abort)"
+            exit 1
+          fi
+
           if [ "$marker_found" -ne 0 ]; then
             exit 1
           fi
diff --git a/.github/workflows/unity-preview-canary.yml b/.github/workflows/unity-preview-canary.yml
new file mode 100644
index 0000000..172de1a
--- /dev/null
+++ b/.github/workflows/unity-preview-canary.yml
@@ -0,0 +1,44 @@
+# Non-blocking preview canary: newest Unity beta line (6000.6) with explicit channel + changeset.
+# Does not gate PR merges. TMP/buildpipeline issues may keep this red until upstream fix ships.
+name: unity-preview-canary
+on:
+  schedule:
+    - cron: '0 6 * * 1' # weekly Monday 06:00 UTC
+  workflow_dispatch:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  canary:
+    name: preview canary
+    uses: ./.github/workflows/unity-build.yml
+    continue-on-error: true
+    permissions:
+      contents: read
+      checks: write
+    secrets:
+      UNITY_USERNAME: ${{ secrets.UNITY_USERNAME }}
+      UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
+    with:
+      utp-test-profile: normal
+      matrix: >-
+        {
+          "include": [
+            {
+              "name": "ubuntu-latest StandaloneLinux64",
+              "os": "ubuntu-latest",
+              "unity-version": "6000.6.0b7",
+              "changeset": "53d4abb44f07",
+              "channel": "b",
+              "build-target": "StandaloneLinux64"
+            },
+            {
+              "name": "windows-latest StandaloneWindows64",
+              "os": "windows-latest",
+              "unity-version": "6000.6.0b7",
+              "changeset": "53d4abb44f07",
+              "channel": "b",
+              "build-target": "StandaloneWindows64"
+            }
+          ]
+        }
diff --git a/.github/workflows/unity-release-discovery.yml b/.github/workflows/unity-release-discovery.yml
new file mode 100644
index 0000000..9a9991f
--- /dev/null
+++ b/.github/workflows/unity-release-discovery.yml
@@ -0,0 +1,21 @@
+name: unity-release-discovery
+on:
+  schedule:
+    - cron: '0 7 * * 1' # weekly Monday 07:00 UTC
+  workflow_dispatch:
+permissions:
+  contents: read
+  issues: write
+jobs:
+  discover:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '24'
+      - name: Discover Unity releases vs matrix
+        env:
+          OPEN_ISSUE: '1'
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: node .github/scripts/unity-release-discovery.cjs
diff --git a/README.md b/README.md
index 1ea5429..fc0a0ab 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ A powerful all-in-one command line utility for the Unity Game Engine. Automate U
 ## Table of Contents
 
 - [Features](#features)
+- [Unity version support](docs/unity-version-support.md)
 - [Installation](#installation)
 - [Usage](#usage)
   - [Common Commands](#common-commands)
@@ -49,6 +50,8 @@ A powerful all-in-one command line utility for the Unity Game Engine. Automate U
 
 ## Features
 
+See [Unity version support](docs/unity-version-support.md) for how CI tiers (supported / preview / untested) map to `setup-unity --channel` and the blocking matrix.
+
 - Install and manage Unity Hub and Unity Editors (multi-platform)
 - Activate and return Unity licenses (personal, professional, floating)
 - Create new Unity projects from templates
@@ -242,6 +245,7 @@ unity-cli hub editors --installed
 - `-p`, `--unity-project <unityProject>` The path to a Unity project or `none` to skip project detection.
 - `-u`, `--unity-version <unityVersion>` The Unity version to get (e.g. `2020.3.1f1`, `2021.x`, `2022.1.*`, `6000`). If specified, it will override the version read from the project.
 - `-c`, `--changeset <changeset>` The Unity changeset to get (e.g. `1234567890ab`).
+- `--channel <channels>` Release channel letter(s) when resolving partial versions: `f`,`p`,`b`,`a`,`x` (comma-separated). Default: `f` (stable only). Partial versions fail closed if no match exists for the requested channel(s).
 - `-a`, `--arch <arch>` The Unity architecture to get (e.g. `x86_64`, `arm64`). Defaults to the architecture of the current process.
 - `-b`, `--build-targets <buildTargets>` The Unity build target to get/install as comma-separated values (e.g. `iOS,Android`).
 - `-m`, `--modules <modules>` The Unity module to get/install as comma-separated values (e.g. `ios,android`).
diff --git a/docs/unity-version-support.md b/docs/unity-version-support.md
new file mode 100644
index 0000000..6083d68
--- /dev/null
+++ b/docs/unity-version-support.md
@@ -0,0 +1,20 @@
+# Unity version support
+
+This repo tests Unity editors on CI in three tiers:
+
+| Tier | What it means | How CI selects |
+|------|----------------|----------------|
+| **Supported** | Blocking integration matrix; must stay green for releases | [`.github/workflows/build-options.json`](../.github/workflows/build-options.json) via `setup-unity` with default `--channel f` (stable/`f` only) |
+| **Preview** | Best-effort beta canary; may be red (e.g. package TMP import) | [`.github/workflows/unity-preview-canary.yml`](../.github/workflows/unity-preview-canary.yml) — pinned FQ beta + `--channel b`, `continue-on-error` |
+| **Untested** | Not in CI; still installable | Fully-qualified `-u 6000.x.yfN -c <changeset>` or partial + `--channel b\|a` |
+
+## Resolving versions
+
+- Partial versions (`6000.5`, `2021.3.x`) resolve only within the requested channel(s). Default is **stable (`f`)**.
+- If no matching stable release exists (e.g. `6000.6` while only betas ship), `setup-unity` **fails closed** instead of letting Hub guess a beta.
+- Use `--channel b` (or `a`) when you intentionally want pre-release streams.
+- Weekly [unity-release-discovery](../.github/workflows/unity-release-discovery.yml) compares the Releases API to the matrix/canary pin and opens/updates a `unity-release-drift` issue when tips move.
+
+## Dependencies
+
+Integration UTP batches install `com.utilities.buildpipeline` from OpenUPM **unpinned** (latest). Preview canary exercises Validate + TMP essentials import against that package.
diff --git a/package-lock.json b/package-lock.json
index bdd36b0..944cfeb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,21 +1,21 @@
 {
   "name": "@rage-against-the-pixel/unity-cli",
-  "version": "3.0.1",
+  "version": "3.0.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@rage-against-the-pixel/unity-cli",
-      "version": "3.0.1",
+      "version": "3.0.2",
       "license": "MIT",
       "dependencies": {
-        "@electron/asar": "^4.2.0",
-        "@rage-against-the-pixel/unity-releases-api": "^1.0.4",
+        "@electron/asar": "^4.2.1",
+        "@rage-against-the-pixel/unity-releases-api": "^1.0.5",
         "commander": "^14.0.3",
         "glob": "^13.0.6",
-        "semver": "^7.8.1",
+        "semver": "^7.8.5",
         "source-map-support": "^0.5.21",
-        "tar": "^7.5.15",
+        "tar": "^7.5.22",
         "update-notifier": "^7.3.1",
         "yaml": "^2.9.0"
       },
@@ -24,11 +24,11 @@
       },
       "devDependencies": {
         "@types/jest": "^30.0.0",
-        "@types/node": "^24.12.4",
-        "@types/semver": "^7.7.1",
+        "@types/node": "^24.13.3",
+        "@types/semver": "^7.8.0",
         "@types/update-notifier": "^6.0.8",
         "jest": "^30.4.2",
-        "ts-jest": "^29.4.11",
+        "ts-jest": "^29.4.12",
         "ts-node": "^10.9.2",
         "typescript": "^6.0.3"
       },
@@ -103,14 +103,14 @@
       }
     },
     "node_modules/@babel/generator": {
-      "version": "7.29.7",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.29.7.tgz",
-      "integrity": "sha512-DkXD5OJQaAQIdZ1bt3UZdEnHAn9Imd3IVBdX03UFe+ony9Ojw5pzr9YVKGDY1jt+Gcn/FnGkNf8r+Vj5NOJWtQ==",
+      "version": "7.29.8",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.29.8.tgz",
+      "integrity": "sha512-gZbepsdh3WDtgZKWL+vTPh71LSBrm/Y4/QDZBVCcYfmeTEEuoOYwlSy+G1StfJg+/Zy550u/3TATbm7qDbbMtg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/parser": "^7.29.7",
-        "@babel/types": "^7.29.7",
+        "@babel/parser": "^7.29.8",
+        "@babel/types": "^7.29.8",
         "@jridgewell/gen-mapping": "^0.3.12",
         "@jridgewell/trace-mapping": "^0.3.28",
         "jsesc": "^3.0.2"
@@ -243,13 +243,13 @@
       }
     },
     "node_modules/@babel/parser": {
-      "version": "7.29.7",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.29.7.tgz",
-      "integrity": "sha512-hnORnjP/1P/zFEndoeX+n+t1RwWRJiJpM/jO7FW32Kn9r5+sJB2JWOdYo4L6k78j15eCwY3Gm/7364B1EMwtNg==",
+      "version": "7.29.8",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.29.8.tgz",
+      "integrity": "sha512-E8lTAYNB1KW+FH+VGJuZM1ioAx2E6oVlvQFRrf5P8ZZmsiJXYAD9vTFV7yyEURNzgh1dFqMZuO6tUwcARbqFCA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/types": "^7.29.7"
+        "@babel/types": "^7.29.8"
       },
       "bin": {
         "parser": "bin/babel-parser.js"
@@ -513,18 +513,18 @@
       }
     },
     "node_modules/@babel/traverse": {
-      "version": "7.29.7",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.29.7.tgz",
-      "integrity": "sha512-EhlfNQtZ+NK22w5BM61ciuiq1m58ed33Wr1Xan//ZRTy6hgjnwyCffRYwzsGXdASJSUJ1guZILsErh1eQcl+zw==",
+      "version": "7.29.8",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.29.8.tgz",
+      "integrity": "sha512-I5z7H3bf/41ktsNVLtpN0wAa336HkqIHQ5BuPLEhTkt1jVSyZpeNKIzTgEWmlxjdg81R0IgUCcaE+Ok3NvrfZg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@babel/code-frame": "^7.29.7",
-        "@babel/generator": "^7.29.7",
+        "@babel/generator": "^7.29.8",
         "@babel/helper-globals": "^7.29.7",
-        "@babel/parser": "^7.29.7",
+        "@babel/parser": "^7.29.8",
         "@babel/template": "^7.29.7",
-        "@babel/types": "^7.29.7",
+        "@babel/types": "^7.29.8",
         "debug": "^4.3.1"
       },
       "engines": {
@@ -532,9 +532,9 @@
       }
     },
     "node_modules/@babel/types": {
-      "version": "7.29.7",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.7.tgz",
-      "integrity": "sha512-4zBIxpPzowiZpusoFkyGVwakdRJUyuH5PxQ/PrqghfdFWWasvnCdPfQXHrenDai+gyLARulZjZowCOj6fjT4pA==",
+      "version": "7.29.8",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.8.tgz",
+      "integrity": "sha512-Vj1jF3cPfxg7OAfoI7QnVKLoILlm2JF9pnVHrX8qx7AHMiYWT+NDAA7jChlNgRS4WTLc/fD1lXLmPixluj+3Gg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -577,12 +577,11 @@
       }
     },
     "node_modules/@electron/asar": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/@electron/asar/-/asar-4.2.0.tgz",
-      "integrity": "sha512-npW1NW5yy8EB9XY/vEw9sUdgmq0sJEhmSBb6bqyFOAw1CSkrhvAvO6QWlW8CdIMo8VN1lkdF345l/MeW0LrY0Q==",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/@electron/asar/-/asar-4.2.1.tgz",
+      "integrity": "sha512-rGyEe7iy52zxiWuihV/h/AqQrFkx7YnUUJKW1bdufVDHCzIMP/XDrDI/NOzv/LLtzt3NduAzNa475WRmRnmswQ==",
       "license": "MIT",
       "dependencies": {
-        "commander": "^13.1.0",
         "glob": "^13.0.2",
         "minimatch": "^10.0.1"
       },
@@ -593,15 +592,6 @@
         "node": ">=22.12.0"
       }
     },
-    "node_modules/@electron/asar/node_modules/commander": {
-      "version": "13.1.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-13.1.0.tgz",
-      "integrity": "sha512-/rFeCpNJQbhSZjGVwO9RFV3xPqbnERS8MmIQzCtD/zl6gpJuV/bMLuN92oG3F7d8oDEHHRrujSXNUr8fpjntKw==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=18"
-      }
-    },
     "node_modules/@emnapi/core": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.10.0.tgz",
@@ -1275,32 +1265,35 @@
       }
     },
     "node_modules/@napi-rs/wasm-runtime": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.4.tgz",
-      "integrity": "sha512-3NQNNgA1YSlJb/kMH1ildASP9HW7/7kYnRI2szWJaofaS1hWmbGI4H+d3+22aGzXXN9IJ+n+GiFVcGipJP18ow==",
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-1.2.2.tgz",
+      "integrity": "sha512-JfB4kuJQjaoHuCTseIINHtHWeJnvgEcxjwA5t/Y00ZgaOO1Crz3fjT/p8kT28zA/Caz7oiUMn3d6H2yOVCVwuw==",
       "dev": true,
       "license": "MIT",
       "optional": true,
       "dependencies": {
-        "@tybys/wasm-util": "^0.10.1"
+        "@tybys/wasm-util": "^0.10.3"
+      },
+      "engines": {
+        "node": "^20.19.0 || ^22.13.0 || >=23.5.0"
       },
       "funding": {
         "type": "github",
         "url": "https://github.com/sponsors/Brooooooklyn"
       },
       "peerDependencies": {
-        "@emnapi/core": "^1.7.1",
-        "@emnapi/runtime": "^1.7.1"
+        "@emnapi/core": "^1.7.1 || ^2.0.0-alpha.3",
+        "@emnapi/runtime": "^1.7.1 || ^2.0.0-alpha.3"
       }
     },
     "node_modules/@pkgr/core": {
-      "version": "0.2.9",
-      "resolved": "https://registry.npmjs.org/@pkgr/core/-/core-0.2.9.tgz",
-      "integrity": "sha512-QNqXyfVS2wm9hweSYD2O7F0G06uurj9kZ96TRQE5Y9hU7+tgdZwIkbAKc5Ocy1HxEY2kuDQa6cQ1WRs/O5LFKA==",
+      "version": "0.3.6",
+      "resolved": "https://registry.npmjs.org/@pkgr/core/-/core-0.3.6.tgz",
+      "integrity": "sha512-SEeaJLb3qBNF/OaXnaR1NmmBbFYk1zC0ZH/52fATcRPLFg/p791YrcyFFy44Bo9sLaGuSuLp5Q6axbb/O+v/RA==",
       "dev": true,
       "license": "MIT",
       "engines": {
-        "node": "^12.20.0 || ^14.18.0 || >=16.0.0"
+        "node": "^14.18.0 || >=16.0.0"
       },
       "funding": {
         "url": "https://opencollective.com/pkgr"
@@ -1334,9 +1327,9 @@
       "license": "ISC"
     },
     "node_modules/@pnpm/npm-conf": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/@pnpm/npm-conf/-/npm-conf-3.0.2.tgz",
-      "integrity": "sha512-h104Kh26rR8tm+a3Qkc5S4VLYint3FE48as7+/5oCEcKR2idC/pF1G6AhIXKI+eHPJa/3J9i5z0Al47IeGHPkA==",
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@pnpm/npm-conf/-/npm-conf-3.0.3.tgz",
+      "integrity": "sha512-//0sR/cow/s4ICQaYoAobOl4aU8cjU6x/V24V7XkKotb9+O+3zySIYp146vpaobYHnxa4pZX8NkV54Z5AwbDKA==",
       "license": "MIT",
       "dependencies": {
         "@pnpm/config.env-replace": "^1.1.0",
@@ -1348,18 +1341,18 @@
       }
     },
     "node_modules/@rage-against-the-pixel/unity-releases-api": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/@rage-against-the-pixel/unity-releases-api/-/unity-releases-api-1.0.4.tgz",
-      "integrity": "sha512-jt7yrF5fsMI24nZUamV17IwCWUH/Wd8WO/j3akQXyZ1hMmelkTAEMMNwV3qeqW3DGkipHP1tP2gu5WAgA8ZtTw==",
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@rage-against-the-pixel/unity-releases-api/-/unity-releases-api-1.0.5.tgz",
+      "integrity": "sha512-BNtvhMsJnzIcELLFTum3Iz+7ZCvHSJQSNd0CRSut8SWWwklhttZCtFCV4LZ4/dTgcTPzKMJMwvxzxagWgz+uJQ==",
       "license": "MIT",
       "dependencies": {
         "jose": "5.10.0"
       }
     },
     "node_modules/@sinclair/typebox": {
-      "version": "0.34.49",
-      "resolved": "https://registry.npmjs.org/@sinclair/typebox/-/typebox-0.34.49.tgz",
-      "integrity": "sha512-brySQQs7Jtn0joV8Xh9ZV/hZb9Ozb0pmazDIASBkYKCjXrXU3mpcFahmK/z4YDhGkQvP9mWJbVyahdtU5wQA+A==",
+      "version": "0.34.52",
+      "resolved": "https://registry.npmjs.org/@sinclair/typebox/-/typebox-0.34.52.tgz",
+      "integrity": "sha512-XiMQh7qqVlxZzcVD+kkGMNGMzcTrDMLWI7S4x7z1MkCkbDPrekpZXEUK0eZqZFMuHQg2a2DZOcDIh9o5v3Gonw==",
       "dev": true,
       "license": "MIT"
     },
@@ -1412,9 +1405,9 @@
       "license": "MIT"
     },
     "node_modules/@tybys/wasm-util": {
-      "version": "0.10.2",
-      "resolved": "https://registry.npmjs.org/@tybys/wasm-util/-/wasm-util-0.10.2.tgz",
-      "integrity": "sha512-RoBvJ2X0wuKlWFIjrwffGw1IqZHKQqzIchKaadZZfnNpsAYp2mM0h36JtPCjNDAHGgYez/15uMBpfGwchhiMgg==",
+      "version": "0.10.3",
+      "resolved": "https://registry.npmjs.org/@tybys/wasm-util/-/wasm-util-0.10.3.tgz",
+      "integrity": "sha512-F3fo1MYrRJYL3zER0OUOmkutjr1Vp23m7OsSgp7nq4SP6OqX6C/56XFIPAl5bt3zaBRjmW7SGz3u/6LwFpYcOg==",
       "dev": true,
       "license": "MIT",
       "optional": true,
@@ -1513,19 +1506,19 @@
       }
     },
     "node_modules/@types/node": {
-      "version": "24.12.4",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.12.4.tgz",
-      "integrity": "sha512-GUUEShf+PBCGW2KaXwcIt3Yk+e3pkKwWKb9GSyM9WQVE+ep2jzmHdGsHzu4wgcZy5fN9FBdVzjpBQsYlpfpgLA==",
+      "version": "24.13.3",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.13.3.tgz",
+      "integrity": "sha512-Dh8vAsV36ig5wa9OX4pXvMc9D3Veibfw2wix0CUwYODLD8nkj9UsLjASr49nPg+2eKzxhBV+v7L8pXvT4e639Q==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": "~7.16.0"
+        "undici-types": "~7.18.0"
       }
     },
     "node_modules/@types/semver": {
-      "version": "7.7.1",
-      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-7.7.1.tgz",
-      "integrity": "sha512-FmgJfu+MOcQ370SD0ev7EI8TlCAfKYU+B4m5T3yXc1CiRN94g/SZPtsCkk506aUDtlMnFZvasDwHHUcZUEaYuA==",
+      "version": "7.8.0",
+      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-7.8.0.tgz",
+      "integrity": "sha512-1mAINjtQCXXeLkJ9ehXkwOcBpqtLxiVtKhpUf83DdRNdQKV0iXZpaHYqRr7nj+wvxuJzoAmAwXI+sCNMv1CzLQ==",
       "dev": true,
       "license": "MIT"
     },
@@ -1565,9 +1558,9 @@
       "license": "MIT"
     },
     "node_modules/@ungap/structured-clone": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/@ungap/structured-clone/-/structured-clone-1.3.1.tgz",
-      "integrity": "sha512-mUFwbeTqrVgDQxFveS+df2yfap6iuP20NAKAsBt5jDEoOTDew+zwLAOilHCeQJOVSvmgCX4ogqIrA0mnyr08yQ==",
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/@ungap/structured-clone/-/structured-clone-1.3.3.tgz",
+      "integrity": "sha512-60YRaenCQcVjYEKOcG824+DRGGIQ3VKErcBoAEDJZz5bKIs2ZG+X/H9Nk+Q6EVkwJk5QNApxbrc5QtBSwtrXAg==",
       "dev": true,
       "license": "ISC"
     },
@@ -1885,9 +1878,9 @@
       ]
     },
     "node_modules/acorn": {
-      "version": "8.16.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.16.0.tgz",
-      "integrity": "sha512-UVJyE9MttOsBQIDKw1skb9nAwQuR5wuGD3+82K6JgJlm/Y+KI92oNsMNGZCYdDsVtRHSak0pcV5Dno5+4jh9sw==",
+      "version": "8.18.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.18.0.tgz",
+      "integrity": "sha512-lGq+9yr1/GuAWaVYIHRjvvySG5/4VfKIvC8EWxStPdcDh/Ka7FG3twP6v4d5BkravUilhIAsG4Qj83t02LWUPQ==",
       "dev": true,
       "license": "MIT",
       "bin": {
@@ -2186,9 +2179,9 @@
       }
     },
     "node_modules/baseline-browser-mapping": {
-      "version": "2.10.32",
-      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.10.32.tgz",
-      "integrity": "sha512-wbPvpyjJPC0zdfdKXxqEL3Ea+bOMD/87X4lftiJkkaBiuG6ALQy1SLmEd7BSmVCuwCQsBrCamgBoLyfFDD1EPg==",
+      "version": "2.11.11",
+      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.11.11.tgz",
+      "integrity": "sha512-/yImnXwyTvgMkhgekLHok/Rx5vO6E0BmStWlSqKWMVm2a2ITuZ1Tn+9bgLS+gZRdZmWtd8nxuhHpdmCUOWsTQQ==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -2222,21 +2215,21 @@
       }
     },
     "node_modules/brace-expansion": {
-      "version": "5.0.6",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.6.tgz",
-      "integrity": "sha512-kLpxurY4Z4r9sgMsyG0Z9uzsBlgiU/EFKhj/h91/8yHu0edo7XuixOIH3VcJ8kkxs6/jPzoI6U9Vj3WqbMQ94g==",
+      "version": "5.0.9",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.9.tgz",
+      "integrity": "sha512-ScQ4IuvIEF1TMlP7Zt+vjJ//9zlPb2SDcxWxM3bk8s6t6GGdJ7KO1dCcTidOPJKePW30LE/2cT7wCyPho9/Wxg==",
       "license": "MIT",
       "dependencies": {
         "balanced-match": "^4.0.2"
       },
       "engines": {
-        "node": "18 || 20 || >=22"
+        "node": "20 || >=22"
       }
     },
     "node_modules/browserslist": {
-      "version": "4.28.2",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.2.tgz",
-      "integrity": "sha512-48xSriZYYg+8qXna9kwqjIVzuQxi+KYWp2+5nCYnYKPTr0LvD89Jqk2Or5ogxz0NUMfIjhh2lIUX/LyX9B4oIg==",
+      "version": "4.28.7",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.28.7.tgz",
+      "integrity": "sha512-JxV13hNrFxqjOc8alRbq9dK1MM79NEXYpma2B2J4wAtpWS5zIEIKqWPGCl7N4o7Uc7B7itylh7SuDujATRyyTw==",
       "dev": true,
       "funding": [
         {
@@ -2254,10 +2247,10 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "baseline-browser-mapping": "^2.10.12",
-        "caniuse-lite": "^1.0.30001782",
-        "electron-to-chromium": "^1.5.328",
-        "node-releases": "^2.0.36",
+        "baseline-browser-mapping": "^2.10.44",
+        "caniuse-lite": "^1.0.30001806",
+        "electron-to-chromium": "^1.5.393",
+        "node-releases": "^2.0.51",
         "update-browserslist-db": "^1.2.3"
       },
       "bin": {
@@ -2320,9 +2313,9 @@
       }
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001793",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001793.tgz",
-      "integrity": "sha512-iwSsYWaCOoh26cV8NwNRViHlrfUvYsHDfRVcbtmw0Kg6PJIZZXwMkj1442FYLBGkeUf1juAsU3DTfxW579mrPA==",
+      "version": "1.0.30001806",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001806.tgz",
+      "integrity": "sha512-72Cuvd95zbSYPKq6Fhg8eDJRlzgWDf7/mtoZv6Qe/DYNCEBdNxoA3+rZAU2ZhGCpZlns3EssFavaZomckT5Uuw==",
       "dev": true,
       "funding": [
         {
@@ -2694,9 +2687,9 @@
       "license": "MIT"
     },
     "node_modules/electron-to-chromium": {
-      "version": "1.5.361",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.361.tgz",
-      "integrity": "sha512-Q6Hts7N9FnJc5LeGRINFvLhCI9xZmNtTDe5ZbcVezQz7cU4a8Aua3GH1b8J2XY8Al9PF+OCwYqhgsOOheMdvkA==",
+      "version": "1.5.399",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.399.tgz",
+      "integrity": "sha512-lEcqhErbHjXRvd41rnWLpzbyU/IXfIYo7QwaFWmxGeLiLyY2TBCdHnWY88vB+p3ubnihRypDm66panXl7TylLA==",
       "dev": true,
       "license": "ISC"
     },
@@ -4297,9 +4290,9 @@
       "license": "MIT"
     },
     "node_modules/js-yaml": {
-      "version": "3.14.2",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.2.tgz",
-      "integrity": "sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==",
+      "version": "3.15.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.15.1.tgz",
+      "integrity": "sha512-S99WuO3HlhO3XN41EtYUNl9zzXjoJx7QvmipxsJVxtCBT0YHEFy+iOJhjSvrmV12nYhWpZaM8lPHkJm0yUMbag==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -4468,12 +4461,12 @@
       }
     },
     "node_modules/minimatch": {
-      "version": "10.2.5",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.2.5.tgz",
-      "integrity": "sha512-MULkVLfKGYDFYejP07QOurDLLQpcjk7Fw+7jXS2R2czRQzR56yHRveU5NDJEOviH+hETZKSkIk5c+T23GjFUMg==",
+      "version": "10.2.6",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.2.6.tgz",
+      "integrity": "sha512-vpLQEs+VLCr1nU0BXS07maYoFwlDAH0gngQuuttxIwutDFEMHq2blX+8vpgxDdK3J1PwjCJiep77OitTZ4Ll1A==",
       "license": "BlueOak-1.0.0",
       "dependencies": {
-        "brace-expansion": "^5.0.5"
+        "brace-expansion": "^5.0.8"
       },
       "engines": {
         "node": "18 || 20 || >=22"
@@ -4557,9 +4550,9 @@
       "license": "MIT"
     },
     "node_modules/node-releases": {
-      "version": "2.0.46",
-      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.46.tgz",
-      "integrity": "sha512-GYVXHE2KnrzAfsAjl4uP++evGFCrAU1jta4ubEjIG7YWt/64Gqv66a30yKwWczVjA6j3bM4nBwH7Pk1JmDHaxQ==",
+      "version": "2.0.51",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.51.tgz",
+      "integrity": "sha512-wRNIrw4DmVLKQlbgOMdkMx27Wrpzes2hh5Jtbi2bjPd+4wJstWIqP5A+lscnqbm0xxmT5Bpg8Lec5ItEBwx6BQ==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -4734,9 +4727,9 @@
       }
     },
     "node_modules/path-scurry/node_modules/lru-cache": {
-      "version": "11.5.0",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-11.5.0.tgz",
-      "integrity": "sha512-5YgH9UJd7wVb9hIouI2adWpgqrrICkt070Dnj8EUY1+B4B2P9eRLPAkAAo6NICA7CEhOIeBHl46u9zSNpNu7zA==",
+      "version": "11.5.2",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-11.5.2.tgz",
+      "integrity": "sha512-4pfM1Ff0x50o0tQwb5ucw/RzNyD0/YJME6IVcStalZuMWxdt3sR3huStTtxz4PUmvZfRguvDejasvQ2kifR11g==",
       "license": "BlueOak-1.0.0",
       "engines": {
         "node": "20 || >=22"
@@ -4750,9 +4743,9 @@
       "license": "ISC"
     },
     "node_modules/picomatch": {
-      "version": "4.0.4",
-      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.4.tgz",
-      "integrity": "sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==",
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.5.tgz",
+      "integrity": "sha512-RvwwcruNjI1ncT5xRakeyS9Lf8lcItv34KD+aif+VH9kduAyfYBipGh12274xtenIPZ119/R9BdTBa8gAwSh0A==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -4879,9 +4872,9 @@
     },
     "node_modules/react-is-19": {
       "name": "react-is",
-      "version": "19.2.6",
-      "resolved": "https://registry.npmjs.org/react-is/-/react-is-19.2.6.tgz",
-      "integrity": "sha512-XjBR15BhXuylgWGuslhDKqlSayuqvqBX91BP8pauG8kd1zY8kotkNWbXksTCNRarse4kuGbe2kIY05ARtwNIvw==",
+      "version": "19.2.8",
+      "resolved": "https://registry.npmjs.org/react-is/-/react-is-19.2.8.tgz",
+      "integrity": "sha512-s5un28nYxKJw5gvUHyW5PCC28CvBqLu9r3cWgzHT4Vo/5fqqkFcdRYsGcKf50WMPpjjFZS5d76fn3YCo2njKwQ==",
       "dev": true,
       "license": "MIT"
     },
@@ -4946,9 +4939,9 @@
       }
     },
     "node_modules/semver": {
-      "version": "7.8.1",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.1.tgz",
-      "integrity": "sha512-rkVq3IXh+4FDGch+KwzX3aV9W3kO54GyEgpvBzSyctDA6Xtd7RJQV1xmXbeQp5v7+VzLOfVqiutSE6GICgPFvg==",
+      "version": "7.8.5",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.5.tgz",
+      "integrity": "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA==",
       "license": "ISC",
       "bin": {
         "semver": "bin/semver.js"
@@ -5171,13 +5164,13 @@
       }
     },
     "node_modules/synckit": {
-      "version": "0.11.12",
-      "resolved": "https://registry.npmjs.org/synckit/-/synckit-0.11.12.tgz",
-      "integrity": "sha512-Bh7QjT8/SuKUIfObSXNHNSK6WHo6J1tHCqJsuaFDP7gP0fkzSfTxI8y85JrppZ0h8l0maIgc2tfuZQ6/t3GtnQ==",
+      "version": "0.11.13",
+      "resolved": "https://registry.npmjs.org/synckit/-/synckit-0.11.13.tgz",
+      "integrity": "sha512-eNRKgb3z66Yp3D2CixVujOUvXLFUTij/zVnV8KRyvFdQwpz7I5DS8UfRkTeLzb64u+dkzDSdelE24izu+zSSUg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@pkgr/core": "^0.2.9"
+        "@pkgr/core": "^0.3.6"
       },
       "engines": {
         "node": "^14.18.0 || >=16.0.0"
@@ -5187,9 +5180,9 @@
       }
     },
     "node_modules/tar": {
-      "version": "7.5.15",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-7.5.15.tgz",
-      "integrity": "sha512-dzGK0boVlC4W5QFuQN1EFSl3bIDYsk7Tj40U6eIBnK2k/8ml7TZ5agbI5j5+qnoVcAA+rNtBml8SEiLxZpNqRQ==",
+      "version": "7.5.22",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-7.5.22.tgz",
+      "integrity": "sha512-MFO/QzvtAOmJbkhOaCTvbGcFN9L9b+JunIsDwaKljSOdcLMea3NJ1k9Usz/rjdfSXTq4dfzfeS7W4p4YOAAHeA==",
       "license": "BlueOak-1.0.0",
       "dependencies": {
         "@isaacs/fs-minipass": "^4.0.0",
@@ -5234,9 +5227,9 @@
       "license": "BSD-3-Clause"
     },
     "node_modules/ts-jest": {
-      "version": "29.4.11",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.4.11.tgz",
-      "integrity": "sha512-IrFl7l9AuB/qrNw5quqvAv/hmKMb8dhWOH4jQOGo0Oq8tCeo1O86/iTFG1FaRimgUkF13l4PcepO8ATFT6Ns4g==",
+      "version": "29.4.12",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.4.12.tgz",
+      "integrity": "sha512-Ov6ClY53Fflh6BGAnY2DlTq1hYDrTycz2PVTXBWFW2CU+9zrEqAp9fWdGXl42EXO5RLSFAcAZ2JFKbP+zBTFfw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -5246,7 +5239,7 @@
         "json5": "^2.2.3",
         "lodash.memoize": "^4.1.2",
         "make-error": "^1.3.6",
-        "semver": "^7.8.0",
+        "semver": "^7.8.5",
         "type-fest": "^4.41.0",
         "yargs-parser": "^21.1.1"
       },
@@ -5403,9 +5396,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "7.16.0",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
-      "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
+      "version": "7.18.2",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",
+      "integrity": "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==",
       "dev": true,
       "license": "MIT"
     },
@@ -5851,9 +5844,9 @@
       }
     },
     "node_modules/yargs": {
-      "version": "17.7.2",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
-      "integrity": "sha512-7dSzzRQ++CKnNI/krKnYRV7JKKPUXMEh61soaHKg9mrWEhzFWhFnxPxGl+69cD1Ou63C13NUPCnmIcrvqCuM6w==",
+      "version": "17.7.3",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.3.tgz",
+      "integrity": "sha512-GZtjxm/J/4TSxuL3FNYjCmLktBTnIw/rVmKSIyKeYAZpmJB2ig9VauCC5xsa82GNKVKDAqpOn3KVzNt0zmrU0g==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 76f8474..127cc1c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rage-against-the-pixel/unity-cli",
-  "version": "3.0.1",
+  "version": "3.0.2",
   "description": "A command line utility for the Unity Game Engine.",
   "author": "RageAgainstThePixel",
   "license": "MIT",
@@ -53,23 +53,23 @@
     "unlink": "npm unlink @rage-against-the-pixel/unity-cli"
   },
   "dependencies": {
-    "@electron/asar": "^4.2.0",
-    "@rage-against-the-pixel/unity-releases-api": "^1.0.4",
+    "@electron/asar": "^4.2.1",
+    "@rage-against-the-pixel/unity-releases-api": "^1.0.5",
     "commander": "^14.0.3",
     "glob": "^13.0.6",
-    "semver": "^7.8.1",
+    "semver": "^7.8.5",
     "source-map-support": "^0.5.21",
-    "tar": "^7.5.15",
+    "tar": "^7.5.22",
     "update-notifier": "^7.3.1",
     "yaml": "^2.9.0"
   },
   "devDependencies": {
     "@types/jest": "^30.0.0",
-    "@types/node": "^24.12.4",
-    "@types/semver": "^7.7.1",
+    "@types/node": "^24.13.3",
+    "@types/semver": "^7.8.0",
     "@types/update-notifier": "^6.0.8",
     "jest": "^30.4.2",
-    "ts-jest": "^29.4.11",
+    "ts-jest": "^29.4.12",
     "ts-node": "^10.9.2",
     "typescript": "^6.0.3"
   },
diff --git a/src/cli.ts b/src/cli.ts
index 5cefb07..a5fb9fe 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -358,6 +358,7 @@ program.command('setup-unity')
     .option('-p, --unity-project <unityProject>', 'The path to a Unity project or "none" to skip project detection.')
     .option('-u, --unity-version <unityVersion>', 'The Unity version to get (e.g. 2020.3.1f1, 2021.x, 2022.1.*, 6000). If specified, it will override the version read from the project.')
     .option('-c, --changeset <changeset>', 'The Unity changeset to get (e.g. 1234567890ab).')
+    .option('--channel <channels>', 'Release channel letter(s) to accept when resolving partial versions: f,p,b,a,x (comma-separated). Default: f (stable only).')
     .option('-a, --arch <arch>', 'The Unity architecture to get (e.g. x86_64, arm64). Defaults to the architecture of the current process.')
     .option('-b, --build-targets <buildTargets>', 'The Unity build target to get/install as comma-separated values (e.g. iOS,Android).')
     .option('-m, --modules <modules>', 'The Unity module to get/install as comma-separated values (e.g. ios,android).')
@@ -416,10 +417,23 @@ program.command('setup-unity')
         }
 
         const unityHub = new UnityHub();
-        const unityEditor = await unityHub.GetEditor(unityVersion, modules);
+        const channels: string[] = options.channel
+            ? String(options.channel).split(/[ ,]+/).map((c: string) => c.trim().toLowerCase()).filter(Boolean)
+            : ['f'];
+        const allowedChannels = new Set(['f', 'p', 'b', 'a', 'x']);
+        for (const ch of channels) {
+            if (!allowedChannels.has(ch)) {
+                Logger.instance.error(`Invalid --channel '${ch}'. Expected one of: f, p, b, a, x.`);
+                process.exit(1);
+            }
+        }
+        const unityEditor = await unityHub.GetEditor(unityVersion, modules, channels);
         const output: { [key: string]: string } = {
             'UNITY_HUB_PATH': unityHub.executable,
-            'UNITY_EDITOR_PATH': unityEditor.editorPath
+            'UNITY_EDITOR_PATH': unityEditor.editorPath,
+            'UNITY_EDITOR_VERSION': unityEditor.version.version,
+            'UNITY_EDITOR_CHANGESET': unityEditor.version.changeset ?? '',
+            'UNITY_EDITOR_CHANNELS': channels.join(','),
         };
 
         if (unityProject) {
diff --git a/src/logging.ts b/src/logging.ts
index 164a802..5d12795 100644
--- a/src/logging.ts
+++ b/src/logging.ts
@@ -1,4 +1,5 @@
 import { UTP, Severity } from './utp';
+import { UTP_BENIGN_SEVERITY_REMAPS } from './utp-benign';
 import { GitHubActionsLoggerProvider, GitHubAnnotationLevel } from './github-actions-ci';
 import { ILoggerProvider, LocalCliLoggerProvider, LoggerAnnotationOptions, MarkdownTarget } from './logger-provider';
 
@@ -386,18 +387,32 @@ function formatDurationMsForSummary(ms: number | undefined): string {
 }
 
 /** Unity/CI noise shown in logs; omit from workflow summary foldouts and counts. */
-const SUMMARY_NOISE_ACCESS_TOKEN = 'Access token is unavailable; failed to update';
+function buildSummaryNoisePatterns(): RegExp[] {
+    return UTP_BENIGN_SEVERITY_REMAPS.map(({ fragment }) => {
+        const escaped = fragment.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+        // Multicast lines often include "(err: 10013)." — strip the whole clause.
+        if (fragment.includes('multicast group')) {
+            return new RegExp(`${escaped}(?:\\s*\\(err:\\s*\\d+\\))?\\.?`, 'gi');
+        }
+        return new RegExp(escaped, 'gi');
+    });
+}
+
+const SUMMARY_NOISE_PATTERNS: RegExp[] = buildSummaryNoisePatterns();
 
 /**
  * Removes known noise phrases from a log message for summary display.
- * Exported for unit tests.
+ * Exported for unit tests. Fragments come from {@link UTP_BENIGN_SEVERITY_REMAPS}.
  */
 export function stripSummaryNoiseFromLogMessage(message: string): string {
     const flat = toSingleLineText(message);
     if (!flat) return '';
-    const pattern = SUMMARY_NOISE_ACCESS_TOKEN.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-    const out = flat.replace(new RegExp(pattern, 'gi'), ' ').replace(/\s+/g, ' ').trim();
-    return out;
+    let out = flat;
+    for (const pattern of SUMMARY_NOISE_PATTERNS) {
+        pattern.lastIndex = 0;
+        out = out.replace(pattern, ' ');
+    }
+    return out.replace(/\s+/g, ' ').trim();
 }
 
 function filterNoiseFromSummaryLogEntries(entries: UTP[]): UTP[] {
diff --git a/src/unity-hub.ts b/src/unity-hub.ts
index 7fe1bf8..c1373d3 100644
--- a/src/unity-hub.ts
+++ b/src/unity-hub.ts
@@ -39,46 +39,108 @@ const MIN_NATIVE_WINDOWS_ARM64_HUB_VERSION = coerce('3.17.0')!;
 /** Allowed characters in a Debian package version (no shell metacharacters). */
 const LINUX_HUB_DEB_VERSION_RE = /^[0-9A-Za-z.+~:-]+$/;
 
+/** Hub 3.20+ Electron Forge deb layout. */
+export const LINUX_HUB_EXECUTABLE_MODERN = '/usr/lib/unityhub/unityhub';
+/** Hub ≤3.19 fpm / electron-builder layout. */
+export const LINUX_HUB_EXECUTABLE_LEGACY = '/opt/unityhub/unityhub';
+
+/**
+ * Resolves the Unity Hub binary on Linux.
+ * Prefers UNITY_HUB_PATH, then the Hub 3.20+ path, then the legacy /opt path.
+ * When neither is present (pre-install), defaults to the modern path.
+ */
+export function resolveLinuxHubExecutable(
+    envPath: string | undefined = process.env.UNITY_HUB_PATH,
+    existsSync: (p: string) => boolean = fs.existsSync
+): string {
+    if (envPath !== undefined && envPath.length > 0) {
+        return envPath;
+    }
+    if (existsSync(LINUX_HUB_EXECUTABLE_MODERN)) {
+        return LINUX_HUB_EXECUTABLE_MODERN;
+    }
+    if (existsSync(LINUX_HUB_EXECUTABLE_LEGACY)) {
+        return LINUX_HUB_EXECUTABLE_LEGACY;
+    }
+    return LINUX_HUB_EXECUTABLE_MODERN;
+}
+
 /**
  * Fixed bootstrap for Linux Hub apt repo + update index. No user-controlled interpolation (CodeQL).
- * Matches prior `Install` update path (wget | gpg | sudo tee, then sources.list).
+ * Uses DEB822 .sources (Hub 3.20+) and removes legacy .list to avoid duplicate-source warnings.
  */
 const LINUX_HUB_LINUX_UPDATE_REPO_BOOTSTRAP = `#!/bin/sh
 set -e
 wget -qO - https://hub.unity3d.com/linux/keys/public | gpg --dearmor | sudo tee /usr/share/keyrings/Unity_Technologies_ApS.gpg >/dev/null
-sudo sh -c 'echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/deb stable main" > /etc/apt/sources.list.d/unityhub.list'
+sudo rm -f /etc/apt/sources.list.d/unityhub.list
+sudo tee /etc/apt/sources.list.d/unityhub.sources >/dev/null <<'EOF'
+Types: deb
+URIs: https://hub.unity3d.com/linux/repos/deb
+Suites: stable
+Components: main
+Signed-By: /usr/share/keyrings/Unity_Technologies_ApS.gpg
+EOF
 sudo apt-get update --allow-releaseinfo-change
 `;
 
 /**
  * First phase of fresh Linux Hub install: machine-id, repo keys, jammy mirror, apt-get update.
- * No user-controlled interpolation.
+ * No user-controlled interpolation. Uses DEB822 .sources (Hub 3.20+).
  */
 const LINUX_HUB_LINUX_INSTALL_BOOTSTRAP = `#!/bin/sh
 set -e
 dbus-uuidgen >/etc/machine-id && mkdir -p /var/lib/dbus/ && ln -sf /etc/machine-id /var/lib/dbus/machine-id
 wget -qO - https://hub.unity3d.com/linux/keys/public | gpg --dearmor | tee /usr/share/keyrings/Unity_Technologies_ApS.gpg >/dev/null
-echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/deb stable main" > /etc/apt/sources.list.d/unityhub.list
+rm -f /etc/apt/sources.list.d/unityhub.list
+tee /etc/apt/sources.list.d/unityhub.sources >/dev/null <<'EOF'
+Types: deb
+URIs: https://hub.unity3d.com/linux/repos/deb
+Suites: stable
+Components: main
+Signed-By: /usr/share/keyrings/Unity_Technologies_ApS.gpg
+EOF
 echo "deb https://archive.ubuntu.com/ubuntu jammy main universe" | tee /etc/apt/sources.list.d/jammy.list
 apt-get update
 `;
 
 /**
  * Post-install cleanup and xvfb / unity-hub wrapper setup. Runs as root; no user interpolation.
+ * Wrapper resolves Hub 3.20+ (/usr/lib/unityhub) vs legacy (/opt/unityhub) at runtime so apt
+ * upgrades that move the binary do not leave a stale path (exit 127).
  */
 const LINUX_HUB_LINUX_INSTALL_POST = `#!/bin/sh
 set -e
 apt-get clean
 sed -i 's/^\\(.*DISPLAY=:.*XAUTHORITY=.*\\)\\( "\\$@" \\)2>&1$/\\1\\2/' /usr/bin/xvfb-run
-printf '#!/bin/bash\\nxvfb-run --auto-servernum /opt/unityhub/unityhub "$@" 2>/dev/null' | tee /usr/bin/unity-hub >/dev/null
-chmod 777 /usr/bin/unity-hub
-which unityhub || { echo "Unity Hub installation failed"; exit 1; }
-hubPath=$(which unityhub)
-if [ -z "$hubPath" ]; then
-    echo "Failed to install Unity Hub"
-    exit 1
+command -v unityhub >/dev/null || { echo "Unity Hub installation failed"; exit 1; }
+hubPath=$(readlink -f "$(command -v unityhub)" 2>/dev/null || true)
+if [ -z "$hubPath" ] || [ ! -x "$hubPath" ]; then
+    if [ -x /usr/lib/unityhub/unityhub ]; then
+        hubPath=/usr/lib/unityhub/unityhub
+    elif [ -x /opt/unityhub/unityhub ]; then
+        hubPath=/opt/unityhub/unityhub
+    else
+        echo "Failed to install Unity Hub"
+        exit 1
+    fi
 fi
-chmod -R 777 "$hubPath"
+tee /usr/bin/unity-hub >/dev/null <<'WRAPPER'
+#!/bin/bash
+if [ -x /usr/lib/unityhub/unityhub ]; then
+  hubBin=/usr/lib/unityhub/unityhub
+elif [ -x /opt/unityhub/unityhub ]; then
+  hubBin=/opt/unityhub/unityhub
+else
+  hubBin=$(readlink -f "$(command -v unityhub)" 2>/dev/null || true)
+fi
+if [ -z "$hubBin" ] || [ ! -x "$hubBin" ]; then
+  echo "Unity Hub binary not found" >&2
+  exit 127
+fi
+exec xvfb-run --auto-servernum "$hubBin" "$@" 2>/dev/null
+WRAPPER
+chmod 777 /usr/bin/unity-hub
+chmod -R 777 "$(dirname "$hubPath")"
 `;
 
 const LINUX_HUB_LINUX_APT_EXTRAS = [
@@ -93,9 +155,9 @@ const LINUX_HUB_LINUX_APT_EXTRAS = [
 
 export class UnityHub {
     /** The path to the Unity Hub executable. */
-    public readonly executable: string;
+    public executable!: string;
     /** The root directory of the Unity Hub installation. */
-    public readonly rootDirectory: string;
+    public rootDirectory!: string;
     /** The file extension for the Unity editor executable. */
     public readonly editorFileExtension: string;
 
@@ -131,8 +193,7 @@ export class UnityHub {
                 this.editorFileExtension = '/Unity.app/Contents/MacOS/Unity';
                 break;
             case 'linux':
-                this.executable = process.env.UNITY_HUB_PATH || '/opt/unityhub/unityhub';
-                this.rootDirectory = path.join(this.executable, '../');
+                this.refreshLinuxHubPaths();
                 this.editorFileExtension = '/Editor/Unity';
                 break;
             default:
@@ -140,6 +201,12 @@ export class UnityHub {
         }
     }
 
+    /** Re-resolve Linux Hub executable + root after install/upgrade (Hub 3.20 moved under /usr/lib). */
+    private refreshLinuxHubPaths(): void {
+        this.executable = resolveLinuxHubExecutable();
+        this.rootDirectory = path.join(this.executable, '../');
+    }
+
     /**
      * Some Hub builds (notably Windows headless) occasionally exit non-zero after streaming usable
      * `editors --releases` / `editors -i` data. Tolerate only when the captured output parses the same
@@ -535,6 +602,9 @@ export class UnityHub {
                         ['apt-get', 'install', '-y', '--no-install-recommends', '--only-upgrade', hubPkg],
                         linuxExecOpts
                     );
+                    // Refresh xvfb wrapper after upgrades that move /opt → /usr/lib (Hub 3.20+).
+                    await Exec('sudo', ['sh', '-c', LINUX_HUB_LINUX_INSTALL_POST], linuxExecOpts);
+                    this.refreshLinuxHubPaths();
                     this.logger.info(`Unity Hub updated successfully.`);
                 } else {
                     throw new Error(`Unsupported platform: ${process.platform}`);
@@ -544,6 +614,9 @@ export class UnityHub {
             }
         }
 
+        if (process.platform === 'linux') {
+            this.refreshLinuxHubPaths();
+        }
         await fs.promises.access(this.executable, fs.constants.X_OK);
         return this.executable;
     }
@@ -683,6 +756,7 @@ export class UnityHub {
                     linuxExecOpts
                 );
                 await Exec('sudo', ['sh', '-c', LINUX_HUB_LINUX_INSTALL_POST], linuxExecOpts);
+                this.refreshLinuxHubPaths();
                 break;
             }
             default:
@@ -810,27 +884,49 @@ export class UnityHub {
         let resolvedVersion = unityVersion;
 
         if (!resolvedVersion.isLegacy()) {
-            try {
-                if (!resolvedVersion.isFullyQualified()) {
+            // Hub list is a fast path only. Misses must fall through to the Releases API —
+            // do not fail-closed until both Hub match and API resolution have failed.
+            if (!resolvedVersion.isFullyQualified()) {
+                try {
                     const releases = await this.ListAvailableReleases();
                     Logger.instance.debug(`Found ${releases.length} available Unity releases, searching channels: ${channels.join(', ')}`);
                     resolvedVersion = resolvedVersion.findMatch(releases, channels);
+                } catch (hubMatchError) {
+                    this.logger.debug(
+                        `No Hub list match for ${resolvedVersion.toString()} (channels: ${channels.join(', ')}); trying Releases API...\n${hubMatchError}`
+                    );
                 }
+            }
 
-                if (!resolvedVersion?.changeset) {
-                    const unityReleaseInfo: UnityRelease = await this.GetEditorReleaseInfo(resolvedVersion);
-                    resolvedVersion = new UnityVersion(unityReleaseInfo.version, unityReleaseInfo.shortRevision, resolvedVersion.architecture);
-                }
-            } catch (error) {
-                this.logger.warn(`Failed to get Unity release info for ${resolvedVersion.toString()}! falling back to legacy search...\n${error}`);
+            if (!resolvedVersion.changeset) {
                 try {
-                    resolvedVersion = await this.fallbackVersionLookup(resolvedVersion);
-                } catch (fallbackError) {
-                    this.logger.warn(`Failed to lookup changeset for Unity ${resolvedVersion.toString()}!\n${fallbackError}`);
+                    const unityReleaseInfo: UnityRelease = await this.GetEditorReleaseInfo(resolvedVersion, channels);
+                    resolvedVersion = new UnityVersion(unityReleaseInfo.version, unityReleaseInfo.shortRevision, resolvedVersion.architecture);
+                } catch (error) {
+                    // Fail closed for partial versions: never Hub-install "6000.6" and hope it picks a beta.
+                    if (!resolvedVersion.isFullyQualified()) {
+                        const msg = error instanceof Error ? error.message : String(error);
+                        throw new Error(
+                            `Failed to resolve Unity ${unityVersion.toString()} for channel(s) [${channels.join(', ')}]: ${msg}`
+                        );
+                    }
+                    this.logger.warn(`Failed to get Unity release info for ${resolvedVersion.toString()}! falling back to legacy search...\n${error}`);
+                    try {
+                        resolvedVersion = await this.fallbackVersionLookup(resolvedVersion);
+                    } catch (fallbackError) {
+                        this.logger.warn(`Failed to lookup changeset for Unity ${resolvedVersion.toString()}!\n${fallbackError}`);
+                    }
                 }
             }
         }
 
+        if (!resolvedVersion.isLegacy() && !resolvedVersion.isFullyQualified()) {
+            throw new Error(
+                `Refusing to install non-fully-qualified Unity version ${resolvedVersion.toString()} without a resolved release. ` +
+                `Use a fully-qualified version or --channel matching an available stream.`
+            );
+        }
+
         const allowPartialMatches = !resolvedVersion.isFullyQualified();
         let editorPath = await this.checkInstalledEditors(resolvedVersion, false, undefined, allowPartialMatches);
         unityVersion = resolvedVersion;
@@ -1038,9 +1134,10 @@ done
      * Gets the specified Unity release info from the Unity Releases API.
      * Supports querying by exact version or by prefix (e.g., "2020", "2020.1", "2021.x", "2021.3.x").
      * @param unityVersion The Unity version to get the release info for.
+     * @param channels Letter channels to accept (`f`, `p`, `b`, `a`, `x`). Default stable-only.
      * @returns The Unity release info.
      */
-    public async GetEditorReleaseInfo(unityVersion: UnityVersion): Promise<UnityRelease> {
+    public async GetEditorReleaseInfo(unityVersion: UnityVersion, channels: string[] = ['f']): Promise<UnityRelease> {
         // Prefer querying the releases API with the exact fully-qualified Unity version (e.g., 2022.3.10f1).
         // If we don't have a fully-qualified version, use the most specific prefix available:
         //  - "YYYY.M" when provided (e.g., 6000.1)
@@ -1061,6 +1158,7 @@ done
         }
 
         const releasesClient = new UnityReleasesClient();
+        const channelSet = new Set(channels.map(c => c.toLowerCase()));
 
         function getPlatform(): Array<('MAC_OS' | 'LINUX' | 'WINDOWS')> {
             switch (process.platform) {
@@ -1075,6 +1173,11 @@ done
             }
         }
 
+        function releaseChannelLetter(releaseVersion: string): string | undefined {
+            const m = /^(\d{1,4})\.(\d+)\.(\d+)([abcfpx])(\d+)$/.exec(releaseVersion);
+            return m?.[4];
+        }
+
         const request: GetUnityReleasesData = {
             url: '/unity/editor/release/v1/releases',
             query: {
@@ -1099,15 +1202,18 @@ done
                 throw new Error(`No Unity releases found for version: ${version}`);
             }
 
-            // Filter to stable 'f' releases only unless the user explicitly asked for a pre-release
-            const isExplicitPrerelease = /[abcpx]$/.test(unityVersion.version) || /[abcpx]/.test(unityVersion.version);
             const releases: ReleaseInfo[] = (data.results || [])
                 .filter((release) => {
                     const v = release.version;
                     if (v == null || v === '') {
                         return false;
                     }
-                    return isExplicitPrerelease || v.includes('f');
+                    // Exact FQ request: accept that row regardless of channel filter.
+                    if (fullUnityVersionPattern.test(unityVersion.version) && v === unityVersion.version) {
+                        return true;
+                    }
+                    const letter = releaseChannelLetter(v);
+                    return letter != null && channelSet.has(letter);
                 })
                 .map(release => ({
                     unityRelease: release,
@@ -1115,7 +1221,13 @@ done
                 }));
 
             if (releases.length === 0) {
-                throw new Error(`No suitable Unity releases (stable) found for version: ${version}`);
+                const channelList = [...channelSet].join(',');
+                throw new Error(
+                    `No suitable Unity releases (channels: ${channelList}) found for version: ${version}` +
+                    (channelSet.has('f') && channelSet.size === 1
+                        ? `. No stable (f) release for ${version}; use --channel b/a or a fully-qualified version.`
+                        : '')
+                );
             }
 
             releases.sort((a, b) => UnityVersion.compare(b.unityVersion, a.unityVersion));
diff --git a/src/unity-logging.ts b/src/unity-logging.ts
index 09db7c3..cbb1d25 100644
--- a/src/unity-logging.ts
+++ b/src/unity-logging.ts
@@ -20,8 +20,10 @@ import {
     UTPMemoryLeak,
     UTPPlayerBuildInfo,
     UTPTestStatus,
-    normalizeTelemetryEntry
+    isElevatedUtpSeverity,
+    normalizeTelemetryEntry,
 } from './utp';
+import { utpMessageMatchesBenignRemap } from './utp-benign';
 
 /**
  * Result of the tailLogFile function containing cleanup resources.
@@ -1127,26 +1129,6 @@ async function writeUtpTelemetryLog(filePath: string, entries: UTP[], logger: Lo
     }
 }
 
-/**
- * Editor log messages whose severity has been changed.
- * Useful for making certain error messages that are not critical less noisy.
- * Key is a substring of the log message, value is the remapped LogLevel.
- */
-const remappedEditorLogs: Record<string, LogLevel> = {
-    'OpenCL device, baking cannot use GPU lightmapper.': LogLevel.INFO,
-    'Failed to find a suitable OpenCL device, baking cannot use GPU lightmapper.': LogLevel.INFO,
-    '~StackAllocator(ALLOC_TEMP_MAIN) m_LastAlloc not NULL. Did you forget to call FreeAllStackAllocations()?': LogLevel.INFO,
-};
-
-function getRemappedEditorLogLevel(message: string): LogLevel | undefined {
-    for (const [fragment, level] of Object.entries(remappedEditorLogs)) {
-        if (message.includes(fragment)) {
-            return level;
-        }
-    }
-    return undefined;
-}
-
 /**
  * Tails a log file using fs.watch and ReadStream for efficient reading.
  * @param logPath The path to the log file to tail.
@@ -1253,15 +1235,7 @@ export function TailLogFile(logPath: string, projectPath: string | undefined): L
                     }
                 }
 
-                if (utp.message && 'severity' in utp &&
-                    (utp.severity === Severity.Error || utp.severity === Severity.Exception || utp.severity === Severity.Assert)) {
-                    let messageLevel: LogLevel = LogLevel.ERROR;
-
-                    const remappedLevel = getRemappedEditorLogLevel(utp.message);
-                    if (remappedLevel !== undefined) {
-                        messageLevel = remappedLevel;
-                    }
-
+                if (utp.message && 'severity' in utp && isElevatedUtpSeverity(utp.severity)) {
                     const normalizedPath = normalizeAnnotationPath(utp.file, projectPath);
                     const stacktrace = sanitizeStackTrace(utp.stackTrace);
                     const message = stacktrace == undefined ? utp.message : `${utp.message}\n${stacktrace}`;
@@ -1279,20 +1253,16 @@ export function TailLogFile(logPath: string, projectPath: string | undefined): L
                                 }
                             }
                         } else {
-                            switch (messageLevel) {
-                                case LogLevel.WARN:
-                                    logger.warn(message);
-                                    break;
-                                case LogLevel.ERROR:
-                                    logger.error(message);
-                                    break;
-                                case LogLevel.INFO:
-                                default:
-                                    logger.info(message);
-                                    break;
-                            }
+                            logger.error(message);
                         }
                     }
+                } else if (utp.message && utpMessageMatchesBenignRemap(utp.message)) {
+                    // Remapped at normalize time (e.g. multicast WSAEACCES); surface as info, not error.
+                    const stacktrace = sanitizeStackTrace(utp.stackTrace);
+                    const message = stacktrace == undefined ? utp.message : `${utp.message}\n${stacktrace}`;
+                    if (!annotationCommandPrefixRegex.test(message)) {
+                        logger.info(message);
+                    }
                 } else if (Logger.instance.logLevel === LogLevel.UTP) {
                     printUTP(utp);
                 }
@@ -1300,8 +1270,21 @@ export function TailLogFile(logPath: string, projectPath: string | undefined): L
                 logger.warn(`Failed to parse telemetry JSON: ${error} -- raw: ${jsonPart}`);
             }
         } else {
+            // Skip plain-log false positives (e.g. "Socket: bind failed, error: …" matching \berror\b).
+            if (utpMessageMatchesBenignRemap(line)) {
+                if (Logger.instance.logLevel !== LogLevel.UTP) {
+                    process.stdout.write(`${line}\n`);
+                }
+                return;
+            }
             const scan = parsePlainLogIssue(line);
             if (scan) {
+                if (utpMessageMatchesBenignRemap(scan.message)) {
+                    if (Logger.instance.logLevel !== LogLevel.UTP) {
+                        process.stdout.write(`${line}\n`);
+                    }
+                    return;
+                }
                 const key = buildIssueKey(scan.file, scan.line, scan.message);
                 if (!seenIssueKeys.has(key)) {
                     seenIssueKeys.add(key);
diff --git a/src/unity-version.ts b/src/unity-version.ts
index dae0ff8..455af99 100644
--- a/src/unity-version.ts
+++ b/src/unity-version.ts
@@ -31,6 +31,13 @@ export class UnityVersion {
         changeset: string | null | undefined = undefined,
         architecture: 'X86_64' | 'ARM64' | undefined = undefined
     ) {
+        // Accept ProjectVersion / matrix style: "5.6.7f1 (e80cc3114ac1)" (no regex: avoid ReDoS).
+        const embedded = UnityVersion.tryParseEmbeddedChangeset(version);
+        if (embedded) {
+            version = embedded.version;
+            changeset = changeset ?? embedded.changeset;
+        }
+
         this.version = version;
         this.changeset = changeset;
         this.semVer = UnityVersion.createSemVer(version);
@@ -103,10 +110,16 @@ export class UnityVersion {
                 this.logger.debug(`Found Unity ${latest.version}`);
                 return new UnityVersion(latest.version, null, this.architecture);
             }
+
+            throw new Error(
+                `No Unity release matching ${this.version} for channel(s) [${channels.join(', ')}]. ` +
+                (channels.length === 1 && channels[0] === 'f'
+                    ? `No stable (f) release for ${this.version}; use --channel b/a or a fully-qualified version (e.g. 6000.6.0b7).`
+                    : `Try a different --channel or a fully-qualified version.`)
+            );
         }
 
-        this.logger.debug(`No matching Unity version found for ${this.version}`);
-        return this;
+        throw new Error(`No matching Unity version found for ${this.version}`);
     }
 
     satisfies(version: UnityVersion): boolean {
@@ -144,6 +157,37 @@ export class UnityVersion {
     private static readonly UNITY_RELEASE_PATTERN = /^(\d{1,4})\.(\d+)\.(\d+)([abcfpx])(\d+)$/;
     private static readonly VERSION_TOKEN_PATTERN = /^(\d{1,4})(?:\.(\d+|x|\*))?(?:\.(\d+|x|\*))?/;
 
+    /**
+     * Parses trailing " (hexchangeset)" without regex to avoid ReDoS on hostile input.
+     */
+    private static tryParseEmbeddedChangeset(raw: string): { version: string; changeset: string } | null {
+        if (!raw.endsWith(')')) {
+            return null;
+        }
+        const open = raw.lastIndexOf('(');
+        if (open <= 0 || raw[open - 1] !== ' ') {
+            return null;
+        }
+        const hex = raw.slice(open + 1, -1);
+        if (hex.length === 0) {
+            return null;
+        }
+        for (let i = 0; i < hex.length; i++) {
+            const c = hex.charCodeAt(i);
+            const isHex =
+                (c >= 48 && c <= 57) || // 0-9
+                (c >= 97 && c <= 102) || // a-f
+                (c >= 65 && c <= 70); // A-F
+            if (!isHex) {
+                return null;
+            }
+        }
+        return {
+            version: raw.slice(0, open - 1).trimEnd(),
+            changeset: hex,
+        };
+    }
+
     private static readonly UNITY_CHANNEL_ORDER: Record<string, number> = {
         a: 0,
         b: 1,
diff --git a/src/utp-benign.ts b/src/utp-benign.ts
new file mode 100644
index 0000000..b463997
--- /dev/null
+++ b/src/utp-benign.ts
@@ -0,0 +1,41 @@
+/**
+ * Known Unity/editor messages that are non-actionable despite elevated UTP severity.
+ * Kept in a leaf module (no imports) so normalize, summaries, and CI share one list
+ * without circular deps between utp.ts and logging.ts.
+ *
+ * Severity strings must match {@link Severity} in utp.ts.
+ */
+export const UTP_BENIGN_SEVERITY_REMAPS: ReadonlyArray<{
+    readonly fragment: string;
+    readonly severity: 'Info' | 'Warning';
+}> = [
+    // Longer OpenCL form first so summary strip does not leave a "Failed to find a suitable" prefix.
+    { fragment: 'Failed to find a suitable OpenCL device, baking cannot use GPU lightmapper.', severity: 'Info' },
+    { fragment: 'OpenCL device, baking cannot use GPU lightmapper.', severity: 'Info' },
+    {
+        fragment:
+            '~StackAllocator(ALLOC_TEMP_MAIN) m_LastAlloc not NULL. Did you forget to call FreeAllStackAllocations()?',
+        severity: 'Info',
+    },
+    // Windows hosted CI: WSAEACCES (10013) — player-connection multicast / socket bind. Unity falls back.
+    { fragment: 'Unable to join player connection multicast group', severity: 'Info' },
+    { fragment: 'Socket: bind failed', severity: 'Info' },
+    {
+        fragment: 'An attempt was made to access a socket in a way forbidden by its access permissions',
+        severity: 'Info',
+    },
+    { fragment: 'Access token is unavailable; failed to update', severity: 'Info' },
+];
+
+/** True if the message matches a known benign Unity/CI noise fragment. */
+export function utpMessageMatchesBenignRemap(message: string): boolean {
+    if (!message) {
+        return false;
+    }
+    for (const { fragment } of UTP_BENIGN_SEVERITY_REMAPS) {
+        if (message.includes(fragment)) {
+            return true;
+        }
+    }
+    return false;
+}
diff --git a/src/utp.ts b/src/utp.ts
index f917ad5..9ce1dfd 100644
--- a/src/utp.ts
+++ b/src/utp.ts
@@ -1,4 +1,10 @@
 import { Logger } from "./logging";
+import { UTP_BENIGN_SEVERITY_REMAPS } from './utp-benign';
+
+export {
+    UTP_BENIGN_SEVERITY_REMAPS,
+    utpMessageMatchesBenignRemap,
+} from './utp-benign';
 
 export class UTPBase {
     type?: string;
@@ -153,6 +159,30 @@ export enum Severity {
     Assert = 'Assert'
 }
 
+/** Severities that normally fail builds / CI expected-success checks. */
+export function isElevatedUtpSeverity(severity: Severity | string | undefined): boolean {
+    return severity === Severity.Error
+        || severity === Severity.Exception
+        || severity === Severity.Assert;
+}
+
+/**
+ * Downgrades elevated severity on known benign messages. Mutates `utp`.
+ * @returns true when severity was changed.
+ */
+export function remapBenignUtpSeverity(utp: UTP): boolean {
+    if (!utp.message || !isElevatedUtpSeverity(utp.severity)) {
+        return false;
+    }
+    for (const { fragment, severity } of UTP_BENIGN_SEVERITY_REMAPS) {
+        if (utp.message.includes(fragment)) {
+            utp.severity = severity as Severity;
+            return true;
+        }
+    }
+    return false;
+}
+
 /**
  * Root-level JSON keys on UTP objects that this CLI recognizes. Other keys are still parsed
  * but reported via {@link normalizeTelemetryEntry}'s `unknownTopLevelKeys` for logging.
@@ -197,8 +227,9 @@ export interface NormalizeTelemetryResult {
 }
 
 /**
- * Normalizes UTP telemetry entries to canonical shapes. Unknown top-level keys are listed
- * for the caller to log (with the raw `##utp:` line when tailing logs).
+ * Normalizes UTP telemetry entries to canonical shapes and remaps known benign elevated
+ * severities. Unknown top-level keys are listed for the caller to log (with the raw
+ * `##utp:` line when tailing logs).
  */
 export function normalizeTelemetryEntry(entry: unknown): NormalizeTelemetryResult {
     if (!entry || typeof entry !== 'object') {
@@ -234,6 +265,18 @@ export function normalizeTelemetryEntry(entry: unknown): NormalizeTelemetryResul
         utp.lineNumber = utp.line;
     }
 
+    // Canonicalize severity string casing from Unity payloads.
+    if (typeof utp.severity === 'string') {
+        const matched = (Object.values(Severity) as string[]).find(
+            s => s.toLowerCase() === (utp.severity as string).toLowerCase()
+        );
+        if (matched) {
+            utp.severity = matched as Severity;
+        }
+    }
+
+    remapBenignUtpSeverity(utp);
+
     if (!utp.type) {
         Logger.instance.warn('UTP entry missing type property; telemetry entry may be ignored.');
     }
diff --git a/tests/linux-hub-path.test.ts b/tests/linux-hub-path.test.ts
new file mode 100644
index 0000000..68a95eb
--- /dev/null
+++ b/tests/linux-hub-path.test.ts
@@ -0,0 +1,34 @@
+import {
+    LINUX_HUB_EXECUTABLE_LEGACY,
+    LINUX_HUB_EXECUTABLE_MODERN,
+    resolveLinuxHubExecutable,
+} from '../src/unity-hub';
+
+describe('resolveLinuxHubExecutable', () => {
+    it('prefers UNITY_HUB_PATH when set', () => {
+        const exists = jest.fn(() => true);
+        expect(resolveLinuxHubExecutable('/custom/unityhub', exists)).toBe('/custom/unityhub');
+        expect(exists).not.toHaveBeenCalled();
+    });
+
+    it('ignores empty UNITY_HUB_PATH and uses filesystem candidates', () => {
+        const exists = (p: string) => p === LINUX_HUB_EXECUTABLE_LEGACY;
+        expect(resolveLinuxHubExecutable('', exists)).toBe(LINUX_HUB_EXECUTABLE_LEGACY);
+        expect(resolveLinuxHubExecutable(undefined, exists)).toBe(LINUX_HUB_EXECUTABLE_LEGACY);
+    });
+
+    it('prefers Hub 3.20+ /usr/lib layout over legacy /opt', () => {
+        const exists = (p: string) =>
+            p === LINUX_HUB_EXECUTABLE_MODERN || p === LINUX_HUB_EXECUTABLE_LEGACY;
+        expect(resolveLinuxHubExecutable(undefined, exists)).toBe(LINUX_HUB_EXECUTABLE_MODERN);
+    });
+
+    it('falls back to legacy /opt when modern path is missing', () => {
+        const exists = (p: string) => p === LINUX_HUB_EXECUTABLE_LEGACY;
+        expect(resolveLinuxHubExecutable(undefined, exists)).toBe(LINUX_HUB_EXECUTABLE_LEGACY);
+    });
+
+    it('defaults to modern path when neither layout is installed', () => {
+        expect(resolveLinuxHubExecutable(undefined, () => false)).toBe(LINUX_HUB_EXECUTABLE_MODERN);
+    });
+});
diff --git a/tests/logging-summary.test.ts b/tests/logging-summary.test.ts
index cef432a..7b6b040 100644
--- a/tests/logging-summary.test.ts
+++ b/tests/logging-summary.test.ts
@@ -28,6 +28,20 @@ describe('stripSummaryNoiseFromLogMessage', () => {
         );
         expect(stripSummaryNoiseFromLogMessage('Access token is unavailable; failed to update')).toBe('');
     });
+
+    it('removes player-connection multicast noise', () => {
+        expect(stripSummaryNoiseFromLogMessage('Unable to join player connection multicast group (err: 10013).')).toBe('');
+        expect(
+            stripSummaryNoiseFromLogMessage('Before. Unable to join player connection multicast group (err: 10013). After.')
+        ).toBe('Before. After.');
+    });
+
+    it('removes OpenCL / access-token noise phrases from the shared remap list', () => {
+        expect(stripSummaryNoiseFromLogMessage('Access token is unavailable; failed to update')).toBe('');
+        expect(
+            stripSummaryNoiseFromLogMessage('Failed to find a suitable OpenCL device, baking cannot use GPU lightmapper.')
+        ).toBe('');
+    });
 });
 
 describe('mergeLogEntriesPreferringSeverity', () => {
diff --git a/tests/run-utp-tests-contract.sh b/tests/run-utp-tests-contract.sh
index e4531d8..e1a9de9 100644
--- a/tests/run-utp-tests-contract.sh
+++ b/tests/run-utp-tests-contract.sh
@@ -1,8 +1,13 @@
 #!/usr/bin/env bash
 # Contract tests for UTP CI assertion helpers (bash; run on Linux CI or Git Bash).
+# Requires dist/utp.js (npm run build) — helpers parse UTP via normalizeTelemetryEntry.
 set -euo pipefail
 
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+if [ ! -f "$ROOT/dist/utp.js" ]; then
+  echo "Building dist/ for UTP normalize…" >&2
+  (cd "$ROOT" && npm run build)
+fi
 # shellcheck source=../.github/actions/scripts/utp-ci-assertion-helpers.sh
 source "$ROOT/.github/actions/scripts/utp-ci-assertion-helpers.sh"
 
@@ -25,6 +30,71 @@ if ! utp_signals_failure_for_expected_success CompilerWarnings "$tmpdir/warn-err
   fail "CompilerWarnings + Error should signal failure for expected-success check"
 fi
 
+# Windows GHA multicast permission noise — remapped to Info by normalizeTelemetryEntry.
+printf '%s\n' '{"type":"Log","severity":"Error","message":"Unable to join player connection multicast group (err: 10013)."}' >"$tmpdir/multicast.json"
+if utp_signals_failure_for_expected_success CompilerWarnings "$tmpdir/multicast.json"; then
+  fail "CompilerWarnings + player-connection multicast Error should be remapped (not actionable)"
+fi
+
+# Unity 2019-style sibling WSAEACCES line (same CI failure mode as multicast).
+printf '%s\n' '{"type":"Log","severity":"Error","message":"Socket: bind failed, error: An attempt was made to access a socket in a way forbidden by its access permissions."}' >"$tmpdir/socket-bind.json"
+if utp_signals_failure_for_expected_success CompilerWarnings "$tmpdir/socket-bind.json"; then
+  fail "CompilerWarnings + Socket bind failed should be remapped (not actionable)"
+fi
+if utp_signals_failure_for_expected_success BuildWarnings "$tmpdir/socket-bind.json"; then
+  fail "BuildWarnings + Socket bind failed should be remapped (not actionable)"
+fi
+if utp_signals_failure_for_expected_success BuildWarnings "$tmpdir/multicast.json"; then
+  fail "BuildWarnings + player-connection multicast Error should be remapped (not actionable)"
+fi
+if utp_signals_failure_for_expected_success EditmodeTestsPassing "$tmpdir/multicast.json"; then
+  fail "Expected-success scenarios should treat remapped multicast as non-actionable"
+fi
+if utp_signals_any_severity_problem "$tmpdir/multicast.json"; then
+  fail "utp_signals_any_severity_problem should treat remapped multicast as non-actionable"
+fi
+
+# Pretty-printed CLI artifact shape (writeUtpTelemetryLog) must parse + remap the same way.
+cat >"$tmpdir/multicast-pretty.json" <<'EOF'
+[
+  {
+    "type": "LogEntry",
+    "severity": "Error",
+    "message": "Unable to join player connection multicast group (err: 10013)."
+  }
+]
+EOF
+if utp_signals_failure_for_expected_success CompilerWarnings "$tmpdir/multicast-pretty.json"; then
+  fail "Pretty-printed multicast UTP artifact should remap Error → Info"
+fi
+
+# Mixed: multicast noise + real Error still fails.
+printf '%s\n' \
+  '{"type":"Log","severity":"Error","message":"Unable to join player connection multicast group (err: 10013)."}' \
+  '{"type":"Log","severity":"Error","message":"boom"}' >"$tmpdir/multicast-plus-real.json"
+if ! utp_signals_failure_for_expected_success CompilerWarnings "$tmpdir/multicast-plus-real.json"; then
+  fail "Real Error alongside multicast noise should still signal failure"
+fi
+
+# Pretty mixed array
+cat >"$tmpdir/multicast-plus-real-pretty.json" <<'EOF'
+[
+  {
+    "type": "LogEntry",
+    "severity": "Error",
+    "message": "Unable to join player connection multicast group (err: 10013)."
+  },
+  {
+    "type": "LogEntry",
+    "severity": "Error",
+    "message": "boom"
+  }
+]
+EOF
+if ! utp_signals_failure_for_expected_success CompilerWarnings "$tmpdir/multicast-plus-real-pretty.json"; then
+  fail "Pretty-printed real Error alongside multicast should still signal failure"
+fi
+
 printf '%s\n' '{"severity":"Assert"}' >"$tmpdir/nonwarn-assert.json"
 if ! utp_signals_failure_for_expected_success EditmodeTestsPassing "$tmpdir/nonwarn-assert.json"; then
   fail "Non-warning scenario should still treat Assert as failure for expected-success check"
@@ -63,4 +133,33 @@ if edit_play_log_suggests_tests_completed_ok EditmodeTestsPassing EditMode; then
   fail "edit_play_log_suggests_tests_completed_ok should reject logs that also contain failure markers"
 fi
 
+# --- run-utp-tests.sh harness contracts (no Unity) ---
+UTP_RUNNER="$ROOT/.github/actions/scripts/run-utp-tests.sh"
+if ! grep -q 'set -euo pipefail' "$UTP_RUNNER"; then
+  fail "run-utp-tests.sh must use set -euo pipefail"
+fi
+if grep -qE '^[[:space:]]*declare -A' "$UTP_RUNNER"; then
+  fail "run-utp-tests.sh must not use declare -A (macOS bash 3.2)"
+fi
+if ! grep -q 'scenarios_run' "$UTP_RUNNER"; then
+  fail "run-utp-tests.sh must track scenarios_run / zero-artifact guard"
+fi
+# Membership check mirrors is_known_utp_test in run-utp-tests.sh
+is_known_utp_test() {
+  case "$1" in
+    CompilerWarnings|CompilerErrors|BuildWarnings|BuildErrors|PlaymodeTestsErrors|EditmodeTestsErrors|EditmodeTestsPassing|EditmodeTestsSkipped|PlaymodeTestsPassing|PlaymodeTestsSkipped|EditmodeSuite|PlaymodeSuite)
+      return 0
+      ;;
+    *)
+      return 1
+      ;;
+  esac
+}
+if ! is_known_utp_test CompilerWarnings; then
+  fail "CompilerWarnings should be a known UTP test"
+fi
+if is_known_utp_test NotARealTest; then
+  fail "NotARealTest should not be a known UTP test"
+fi
+
 echo "run-utp-tests-contract: OK"
diff --git a/tests/unity-hub-release-api-filter.test.ts b/tests/unity-hub-release-api-filter.test.ts
index 3b8580b..2b8a46e 100644
--- a/tests/unity-hub-release-api-filter.test.ts
+++ b/tests/unity-hub-release-api-filter.test.ts
@@ -62,4 +62,21 @@ describe('UnityHub GetEditorReleaseInfo (sparse API rows)', () => {
         const hub = new UnityHub();
         await expect(hub.GetEditorReleaseInfo(new UnityVersion('2021'))).rejects.toThrow(/No suitable Unity releases/);
     });
+
+    it('accepts beta releases when channel b is requested', async () => {
+        mockGetUnityReleases.mockResolvedValue({
+            data: {
+                results: [
+                    { version: '6000.6.0b7', shortRevision: '53d4abb44f07' },
+                    { version: '6000.5.7f1', shortRevision: 'stable' },
+                ],
+            },
+            error: undefined,
+        });
+
+        const hub = new UnityHub();
+        const info = await hub.GetEditorReleaseInfo(new UnityVersion('6000.6'), ['b']);
+        expect(info.version).toBe('6000.6.0b7');
+        expect(info.shortRevision).toBe('53d4abb44f07');
+    });
 });
diff --git a/tests/unity-version.test.ts b/tests/unity-version.test.ts
index c0e8a4c..bb9ac03 100644
--- a/tests/unity-version.test.ts
+++ b/tests/unity-version.test.ts
@@ -9,6 +9,20 @@ describe('UnityVersion', () => {
         expect(UnityVersion.compare(f2, version)).toBeGreaterThan(0);
     });
 
+    it('parses embedded changeset from version (changeset) strings', () => {
+        const version = new UnityVersion('5.6.7f1 (e80cc3114ac1)');
+        expect(version.version).toBe('5.6.7f1');
+        expect(version.changeset).toBe('e80cc3114ac1');
+        expect(version.isFullyQualified()).toBe(true);
+        expect(version.toString()).toBe('5.6.7f1 (e80cc3114ac1)');
+    });
+
+    it('keeps explicit changeset over embedded parenthetical', () => {
+        const version = new UnityVersion('5.6.7f1 (e80cc3114ac1)', 'aaaaaaaaaaaa');
+        expect(version.version).toBe('5.6.7f1');
+        expect(version.changeset).toBe('aaaaaaaaaaaa');
+    });
+
     it('orders Unity builds by channel and revision', () => {
         const alpha = new UnityVersion('2021.3.5a1');
         const beta = new UnityVersion('2021.3.5b1');
@@ -101,27 +115,43 @@ describe('UnityVersion', () => {
         expect(match.version).toBe('2021.3.5p2');
     });
 
-    it('returns original when no channel candidates exist', () => {
+    it('throws when no channel candidates exist', () => {
         const available = [
             '2021.3.5f2'
         ];
 
         const version = new UnityVersion('2021.3.x');
-        const match = version.findMatch(available, ['a']);
-
-        expect(match.version).toBe('2021.3.x');
+        expect(() => version.findMatch(available, ['a'])).toThrow(/No Unity release matching/);
     });
 
-    it('keeps explicit minor requests when no matching releases are available', () => {
+    it('throws when explicit minor has no matching releases', () => {
         const available = [
             '6000.3.0f1'
         ];
 
         const version = new UnityVersion('6000.0.x');
-        const match = version.findMatch(available);
+        expect(() => version.findMatch(available)).toThrow(/No Unity release matching/);
+    });
 
-        // When only other minors exist (e.g., 6000.3.*), do not fall back to them.
-        expect(match.version).toBe('6000.0.x');
+    it('throws for stable channel when only beta exists (6000.6)', () => {
+        const available = [
+            '6000.6.0b7',
+            '6000.5.7f1',
+            '6000.7.0a4',
+        ];
+        const version = new UnityVersion('6000.6');
+        expect(() => version.findMatch(available, ['f'])).toThrow(/No stable \(f\) release/);
+    });
+
+    it('resolves beta channel for 6000.6 when only b releases exist', () => {
+        const available = [
+            '6000.6.0b5',
+            '6000.6.0b7',
+            '6000.5.7f1',
+        ];
+        const version = new UnityVersion('6000.6');
+        const match = version.findMatch(available, ['b']);
+        expect(match.version).toBe('6000.6.0b7');
     });
 
     it('evaluates caret compatibility with satisfies', () => {
diff --git a/tests/utp-telemetry-fixtures.test.ts b/tests/utp-telemetry-fixtures.test.ts
index ef705f7..d1b57b3 100644
--- a/tests/utp-telemetry-fixtures.test.ts
+++ b/tests/utp-telemetry-fixtures.test.ts
@@ -1,6 +1,10 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import { normalizeTelemetryEntry, UTP_SUPPORTED_TOP_LEVEL_PROPERTIES } from '../src/utp';
+import {
+    normalizeTelemetryEntry,
+    Severity,
+    UTP_SUPPORTED_TOP_LEVEL_PROPERTIES,
+} from '../src/utp';
 import { buildTestResultsTableMarkdown, utpToTestResultSummary } from '../src/logging';
 import { formatUtpUnrecognizedTopLevelPropertiesMessage } from '../src/unity-logging';
 
@@ -72,6 +76,68 @@ describe('UTP telemetry fixtures', () => {
     });
 });
 
+describe('normalizeTelemetryEntry benign severity remaps', () => {
+    it('remaps player-connection multicast Error to Info', () => {
+        const { utp } = normalizeTelemetryEntry({
+            type: 'LogEntry',
+            severity: 'Error',
+            message: 'Unable to join player connection multicast group (err: 10013).',
+        });
+        expect(utp.severity).toBe(Severity.Info);
+    });
+
+    it('remaps Socket bind failed / WSAEACCES permission Errors to Info', () => {
+        const bind = normalizeTelemetryEntry({
+            type: 'LogEntry',
+            severity: 'Error',
+            message:
+                'Socket: bind failed, error: An attempt was made to access a socket in a way forbidden by its access permissions.',
+        }).utp;
+        expect(bind.severity).toBe(Severity.Info);
+
+        const plainExtracted = normalizeTelemetryEntry({
+            type: 'LogEntry',
+            severity: Severity.Error,
+            message: 'An attempt was made to access a socket in a way forbidden by its access permissions.',
+        }).utp;
+        expect(plainExtracted.severity).toBe(Severity.Info);
+    });
+
+    it('remaps OpenCL and StackAllocator elevated severities to Info', () => {
+        const opencl = normalizeTelemetryEntry({
+            type: 'LogEntry',
+            severity: Severity.Error,
+            message: 'Failed to find a suitable OpenCL device, baking cannot use GPU lightmapper.',
+        }).utp;
+        expect(opencl.severity).toBe(Severity.Info);
+
+        const stack = normalizeTelemetryEntry({
+            type: 'LogEntry',
+            severity: Severity.Assert,
+            message: '~StackAllocator(ALLOC_TEMP_MAIN) m_LastAlloc not NULL. Did you forget to call FreeAllStackAllocations()?',
+        }).utp;
+        expect(stack.severity).toBe(Severity.Info);
+    });
+
+    it('leaves real Errors unchanged', () => {
+        const { utp } = normalizeTelemetryEntry({
+            type: 'Compiler',
+            severity: 'Error',
+            message: 'Assets/Foo.cs(1,1): error CS0001: boom',
+        });
+        expect(utp.severity).toBe(Severity.Error);
+    });
+
+    it('canonicalizes severity casing', () => {
+        const { utp } = normalizeTelemetryEntry({
+            type: 'LogEntry',
+            severity: 'error',
+            message: 'real failure',
+        });
+        expect(utp.severity).toBe(Severity.Error);
+    });
+});
+
 describe('formatUtpUnrecognizedTopLevelPropertiesMessage', () => {
     it('includes unknown key names and the full ##utp line', () => {
         const line = '##utp:{"type":"Action","extra":1}';