docs(decisions): handoff for parallel L0 checks; runner usage names --jobs

Co-Authored-By: Claude Opus 5.5 <[email protected]>
feat(ci): run L0/L1 offline checks, mutation suites and yamllint in bounded parallel pools
2026-11-08 00:34:48 -06:00 · 2026-11-08 00:18:57 -06:00
20 changed files with 440 additions and 202 deletions
@@ -85,7 +85,7 @@ spec:
        - name: config
          mountPath: /config
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -90,7 +90,7 @@ spec:
              - -c
              - "# Assert the declared adlists in gravity.db. Idempotent: steady state writes nothing and\n# does NOT run a gravity rebuild.\nset -u\nGRAVITY=/etc/pihole/gravity.db\n\n# THE DECLARED SET \u2014 one URL per line, the source of truth for what PiHole blocks.\n# To add a list: add a line here, commit, let Flux reconcile. Nothing else to do.\nDECLARED='https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts'\n\n# On a fresh PVC, FTL creates gravity.db a moment after the container starts. Wait, bounded,\n# and NEVER block or fail the start: a missing DB here must not crashloop DNS for the LAN.\ni=0\nwhile [ ! -s \"$GRAVITY\" ] && [ \"$i\" -lt 90 ]; do sleep 2; i=$(expr $i + 1); done\nif [ ! -s \"$GRAVITY\" ]; then\n  echo \"pihole-adlists: gravity.db absent after 180s - leaving adlists untouched\" >&2\n  exit 0\nfi\n\nsql() { pihole-FTL sqlite3 \"$GRAVITY\" \"$1\"; }\nCHANGED=0\n\n# 1) Every declared URL must be present AND enabled.\necho \"$DECLARED\" | while IFS= read -r url; do\n  [ -n \"$url\" ] || continue\n  printf '%s\\n' \"$url\"\ndone > /tmp/declared.txt\nwhile IFS= read -r url; do\n  [ -n \"$url\" ] || continue\n  # Single quotes inside a URL would break this SQL; adlist URLs do not contain them.\n  have=$(sql \"select count(*) from adlist where address='$url';\")\n  if [ \"$have\" = \"0\" ]; then\n    echo \"pihole-adlists: adding $url\"\n    sql \"insert into adlist (address,enabled,comment) values ('$url',1,'declared in catalog/pihole.yaml');\"\n    CHANGED=1\n  else\n    en=$(sql \"select enabled from adlist where address='$url';\")\n    if [ \"$en\" != \"1\" ]; then\n      echo \"pihole-adlists: re-enabling $url\"\n      sql \"update adlist set enabled=1 where address='$url';\"\n      CHANGED=1\n    fi\n  fi\ndone < /tmp/declared.txt\n\n# 2) Anything enabled in the DB but NOT declared gets disabled (never deleted - see above).\nsql \"select address from adlist where enabled=1;\" | while IFS= read -r addr; do\n  [ -n \"$addr\" ] || continue\n  if ! grep -qxF \"$addr\" /tmp/declared.txt; then\n    echo \"pihole-adlists: disabling undeclared $addr\"\n    sql \"update adlist set enabled=0 where address='$addr';\"\n    echo changed >> /tmp/adlist-changed\n  fi\ndone\n[ -s /tmp/adlist-changed ] && CHANGED=1\nrm -f /tmp/adlist-changed /tmp/declared.txt\n\n# 3) Rebuild gravity ONLY if the declared set actually moved.\nif [ \"$CHANGED\" = \"1\" ]; then\n  echo \"pihole-adlists: declared set changed - running gravity update\"\n  pihole -g || echo \"pihole-adlists: gravity update failed; existing gravity.db retained\" >&2\nelse\n  echo \"pihole-adlists: already matches the declared set - nothing to do\"\nfi\nexit 0\n"
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -156,7 +156,7 @@ spec:
                , \"[Preferences]\"\n\ndef matches(raw):\n    \"\"\"True iff the stored digest is one OUR password produces (salt is read from it).\"\"\"\n    v = raw.strip().strip('\"')\n    if v.startswith(\"@ByteArray(\") and v.endswith(\")\"):\n        v = v[len(\"@ByteArray(\"):-1]\n    try:\n        salt_b64, digest_b64 = v.split(\":\", 1)\n        salt = base64.b64decode(salt_b64, validate=True)\n        digest = base64.b64decode(digest_b64, validate=True)\n    except Exception:\n        return False\n    if not salt or not digest:\n        return False\n    return hmac.compare_digest(\n        hashlib.pbkdf2_hmac(\"sha512\", pw.encode(), salt, ITERATIONS, len(digest)), digest)\n\ntry:\n    lines = open(conf, encoding=\"utf-8\", errors=\"replace\").read().splitlines()\nexcept FileNotFoundError:\n    lines = []\n\ndef value_of(key):\n    for i, line in enumerate(lines):\n        if line.startswith(key + \"=\"):\n            return i, line.split(\"=\", 1)[1]\n    return -1, None\n\nui, uval = value_of(UKEY)\npi, pval = value_of(PKEY)\nif uval == user and pval is not None and matches(pval):\n    raise SystemExit(0)          # converged - leave the file (and its salt) alone\n\nsalt = os.urandom(SALT_LEN)\ndigest = hashlib.pbkdf2_hmac(\"sha512\", pw.encode(), salt, ITERATIONS, DIGEST_LEN)\nstored = base64.b64encode(salt).decode() + \":\" + base64.b64encode(digest).decode()\ndesired = [UKEY + \"=\" + user, PKEY + '=\"@ByteArray(' + stored + ')\"']\n\nout = [line for i, line in enumerate(lines) if i not in (ui, pi)]\nif SECTION in out:\n    at = out.index(SECTION) + 1\nelse:\n    if out and out[-1].strip():\n        out.append(\"\")\n    out.append(SECTION)\n    at = len(out)\nout[at:at] = desired\n\ntry:\n    os.makedirs(os.path.dirname(conf) or \".\", exist_ok=True)\n    tmp = conf + \".webui-cred.new\"\n    with open(tmp, \"w\", encoding=\"utf-8\") as fh:\n        fh.write(\"\\n\".join(out) + \"\\n\")\n        fh.flush()\n        os.fsync(fh.fileno())\n    # This hook runs as ROOT; the service runs as PUID:PGID. A root-owned 0600 conf would\n    # cost the app the ability to save its own settings, so carry the ownership over.\n    try:\n        st = os.stat(conf)\n        os.chown(tmp, st.st_uid, st.st_gid)\n        os.chmod(tmp, stat.S_IMODE(st.st_mode))\n    except FileNotFoundError:\n        os.chown(tmp, int(os.environ.get(\"PUID\", \"1000\")),\n                 int(os.environ.get(\"PGID\", \"1000\")))\n        os.chmod(tmp, 0o664)\n    os.replace(tmp, conf)        # atomic: the app never reads a half-written conf\nexcept OSError as exc:\n    sys.stderr.write(\"[qbt-webui-cred] cannot write %s: %s\\n\" % (conf, exc))\n    raise SystemExit(1)\nraise SystemExit(10)\nPY\n  rc=$?\n\n  if [ \"$rc\" = 0 ]; then\n    log \"conf already holds the durable credential for '$QBT_WEBUI_USERNAME' (no write)\"\n  elif [ \"$rc\" = 10 ]; then\n    log \"asserted WebUI Username + Password_PBKDF2 into $CONF\"\n    # postStart runs CONCURRENTLY with the s6 init chain, so qbittorrent-nox may ALREADY\n    # have read the old, credential-less conf and be serving a random temporary password.\n    # Restart the SUPERVISED SERVICE (not the pod) so it re-reads what was just written.\n    # Nothing to do when the service has not started yet - it will read the new file.\n    # Its own counter, NOT the shared `waited` API budget: sharing one counter is how the\n    # 2026-09-13 failure spent the entire verification budget before the first login and\n    # then fired attempts 2 and 3 with no wait left at all.\n    sv=0\n    while [ \"$sv\" -lt 60 ] && [ \"$(s6-svstat -u \"$SVC\" 2>/dev/null)\" != \"true\" ]; do\n      sv=$((sv + 1)); sleep 1\n    done\n    if [ \"$(s6-svstat -u \"$SVC\" 2>/dev/null)\" = \"true\" ]; then\n      log \"qbittorrent-nox was already running - restarting it to load the credential\"\n      s6-svc -r \"$SVC\" || log \"s6-svc -r failed (continuing to verify anyway)\"\n      sleep 3\n    fi\n  else\n    log \"FAILED to write the credential into $CONF (helper exit $rc). The WebUI will keep\" >&2\n    log \"minting a random password\
                \ every start and BOTH arrs will break. Fix and restart.\" >&2\n    exit 0\n  fi\n\n  # (3) GROUND TRUTH: the WebUI itself must accept it. Wait for the API to answer at ALL\n  #     (shared ~120s budget across attempts), then spend exactly ONE login per attempt -\n  #     at most 3 rejected logins, which stays under qBittorrent's default ban threshold.\n  #\n  # \"THE API NEVER ANSWERED\" IS A DIFFERENT FAULT FROM \"THE PASSWORD WAS REJECTED\", and\n  # conflating them is what made this hook lie once already (see the PORT comment). An\n  # unreachable WebUI is reported as unreachable, and the hook stops rather than spending\n  # its remaining login attempts to produce two more identical wrong diagnoses.\n  api_ok=0\n  while [ \"$waited\" -lt 120 ]; do\n    code=$(curl -s -o /dev/null -m 3 -w '%{http_code}' \"http://127.0.0.1:$PORT/\" 2>/dev/null)\n    if [ -n \"$code\" ] && [ \"$code\" != \"000\" ]; then api_ok=1; break; fi\n    waited=$((waited + 1)); sleep 1\n  done\n  if [ \"$api_ok\" != 1 ]; then\n    log \"the WebUI never answered on 127.0.0.1:$PORT within the wait budget, so the\" >&2\n    log \"credential in $CONF is UNVERIFIED. This is NOT a rejected password - it was\" >&2\n    log \"never submitted. Do not rotate the credential on the strength of this line.\" >&2\n    exit 0\n  fi\n  body=$(curl -sS -m 10 \\\n           --data-urlencode \"username=$QBT_WEBUI_USERNAME\" \\\n           --data-urlencode \"password=$QBT_WEBUI_PASSWORD\" \\\n           \"http://127.0.0.1:$PORT/api/v2/auth/login\" 2>/dev/null)\n  if [ \"$body\" = \"Ok.\" ]; then\n    log \"VERIFIED: the WebUI accepts the durable credential for '$QBT_WEBUI_USERNAME'\"\n    exit 0\n  fi\n  log \"WebUI rejected the durable credential (login said '$body')\" >&2\n  # A rejection when the conf was ALREADY converged (rc=0, nothing written) can only mean\n  # the running qbittorrent-nox is serving something it read from an EARLIER conf, so\n  # rewriting the same bytes on the next attempt would change nothing. The remedy is to\n  # make the process RE-READ the file, so restart the supervised service and let the next\n  # attempt re-verify. Without this the retry loop could never change its own outcome.\n  if [ \"$(s6-svstat -u \"$SVC\" 2>/dev/null)\" = \"true\" ]; then\n    log \"restarting qbittorrent-nox so it re-reads $CONF, then re-verifying\" >&2\n    s6-svc -r \"$SVC\" || log \"s6-svc -r failed (continuing to verify anyway)\" >&2\n    sleep 3\n  fi\ndone\n\nlog \"GAVE UP after $attempt attempts: the WebUI does not accept the credential from git.\" >&2\n# A postStart hook MUST exit 0 - a non-zero exit makes the kubelet KILL the container\n# (FailedPostStartHook -> CrashLoopBackOff), turning a credential fault into an outage.\n# Both failure paths above therefore log LOUDLY and exit 0; the `up` SLI still watches the\n# app, and the arrs' own download-client health check surfaces a broken credential.\nexit 0\n"
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -138,7 +138,7 @@ spec:
        - name: media
          mountPath: /media
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -138,7 +138,7 @@ spec:
        - name: media
          mountPath: /media
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -129,7 +129,7 @@ AUTH_MODES = ("oidc", "forward-auth", "native", "none")
 # the sidecar authenticates the browser against Keycloak (homelab realm, the app's auth.groups)
 # and only THEN proxies to the co-located app UI at http://127.0.0.1:<uiport>. The gate is IN
 # the data path (fail-closed: no valid session in an authorized group => no upstream; R-IDP-02).
-OAUTH2_PROXY_IMAGE = "quay.io/oauth2-proxy/oauth2-proxy:v7.15.6"
+OAUTH2_PROXY_IMAGE = "quay.io/oauth2-proxy/oauth2-proxy:v7.8.1"
 OAUTH2_PROXY_PORT = 4180
 KEYCLOAK_ISSUER = f"https://keycloak.{ZONE}/realms/homelab"

@@ -25,8 +25,44 @@ if [ "${#files[@]}" -eq 0 ]; then
  exit 0
 fi

-yamllint -c "${CI_DIR}/yamllint.yaml" -f "${YAMLLINT_FORMAT:-standard}" "${files[@]}"
-ok "yaml/lint passed (${#files[@]} files)"
+# yamllint is single-threaded, so the file list is split into LINT_JOBS CONTIGUOUS slices of the
+# sorted list, one yamllint per slice, run concurrently. Each slice's output goes to its own file
+# and the files are printed in slice order afterwards: the log is the same text, in the same
+# file order, as one serial `yamllint "${files[@]}"`, and a finding is never interleaved with
+# another process's output (yamllint's standard format puts the FILE NAME on its own line above
+# that file's `line:col` findings, so interleaving would misattribute them). The stage's exit
+# code is the highest any slice returned (yamllint: 1 = error, 2 = warning under strict), so a
+# single failing slice fails the stage exactly as the serial call did. LINT_JOBS=1 is serial.
+lint_jobs="${LINT_JOBS:-$(n="$(nproc 2>/dev/null || echo 1)"; [ "$n" -gt 8 ] && n=8; echo "$n")}"
+case "$lint_jobs" in ''|*[!0-9]*|0) err "LINT_JOBS must be a positive integer, got '${lint_jobs}'"; exit 2 ;; esac
+[ "$lint_jobs" -gt "${#files[@]}" ] && lint_jobs="${#files[@]}"
+lint_tmp="$(mktemp -d)"
+trap 'rm -rf "$lint_tmp"' EXIT
+per=$(( (${#files[@]} + lint_jobs - 1) / lint_jobs ))
+pids=()
+for (( i = 0; i < lint_jobs; i++ )); do
+  slice=("${files[@]:$(( i * per )):${per}}")
+  [ "${#slice[@]}" -gt 0 ] || break
+  ( rc=0
+    yamllint -c "${CI_DIR}/yamllint.yaml" -f "${YAMLLINT_FORMAT:-standard}" "${slice[@]}" \
+      >"${lint_tmp}/${i}.out" 2>&1 || rc=$?
+    echo "$rc" >"${lint_tmp}/${i}.rc" ) &
+  pids+=("$!")
+done
+wait "${pids[@]}" || true
+lint_rc=0
+for (( i = 0; i < ${#pids[@]}; i++ )); do
+  cat "${lint_tmp}/${i}.out"
+  # A slice that left no rc file died before yamllint returned: that is a failure, not a pass.
+  slice_rc="$(cat "${lint_tmp}/${i}.rc" 2>/dev/null || true)"
+  case "$slice_rc" in ''|*[!0-9]*) slice_rc=1 ;; esac
+  [ "$slice_rc" -gt "$lint_rc" ] && lint_rc="$slice_rc"
+done
+if [ "$lint_rc" -ne 0 ]; then
+  err "yaml/lint failed (yamllint exit ${lint_rc}; ${#files[@]} files in ${#pids[@]} parallel slice(s))"
+  exit "$lint_rc"
+fi
+ok "yaml/lint passed (${#files[@]} files, ${#pids[@]} parallel slice(s))"

 # A workflow's `configurationFile:` must name a file that exists. Renovate's did not after #79
 # renamed renovate.json -> renovate.json5, and every scheduled run failed with ENOENT for 11 days
@@ -14,7 +14,7 @@ Pure standard library (matches the harness's no-pip-dependency posture); the che
 themselves shell out (render checks to catalog/render.py, whose PyYAML dependency lives
 there; L0 checks to git + PyYAML).

-Usage: run_l1_offline.py --junit <out.xml> [--label-prefix P] <test-dir> [<test-dir> ...]
+Usage: run_l1_offline.py --junit <out.xml> [--label-prefix P] [--jobs N] <test-dir> [<test-dir> ...]
 Exit 0 iff every selected offline check passes.

 The per-dir check script is whichever of `render-check.sh` / `check.sh` the directory
@@ -43,13 +43,35 @@ Exit codes: 0 all selected checks passed / 1 at least one FAILED / 3 nothing fai
 scope-declared check was UNWIRED. conformance/run.sh propagates 3 verbatim; ci/l0.sh turns it
 into the gate's own rc 3. This is the ONE place the "unwired, not green" rule lives now,
 instead of once per hand-written stage.
+
+PARALLELISM (--jobs, env CONF_OFFLINE_JOBS)
+-------------------------------------------
+The checks are independent processes, so they run in a bounded thread pool (one `bash` child
+per worker). Default: min(8, usable CPUs); `--jobs 1` is the old serial runner exactly. Each
+check's stdout+stderr is CAPTURED and only reported after every check has finished, in the
+ORDER THE DIRS WERE GIVEN, so the log, the JUnit and the step summary are byte-for-byte
+independent of which check finished first (only the trailing "[N.Ns]" wall-time on each
+status line varies). The 0/1/3 aggregation runs over the same ordered case list as before.
+
+Parallel-safety is a property of the CHECKS, not of this runner: every check must keep its
+scratch state in a private mktemp/mkdtemp dir and must not write into the tree or a fixed
+path. The audit that established that for the current set is recorded in
+decisions/2026-11-08-parallel-l0-checks.md; a new check that needs shared state must say so.
+
+Nested pools: the keycloak reconciler checks run their own mutation suites in a pool
+(mutations.py, env MUTATION_JOBS). When this runner is itself parallel it exports a SMALLER
+MUTATION_JOBS (unless the caller already set one), so the two suites share the CPUs the
+other jobs-2 checks are not using instead of each taking min(8, CPUs). See inner_jobs().
 """
 from __future__ import annotations

 import argparse
+import os
 import re
 import subprocess
 import sys
+import time
+from concurrent.futures import ThreadPoolExecutor
 import xml.etree.ElementTree as ET
 from pathlib import Path
 from xml.dom import minidom
@@ -97,6 +119,46 @@ def collect_meta(test_yaml: Path, prefix: str):
    return name, reqs


+def usable_cpus() -> int:
+    """CPUs this process may run on (the cgroup/affinity view, not the host's count)."""
+    try:
+        return max(1, len(os.sched_getaffinity(0)))
+    except (AttributeError, OSError):
+        return max(1, os.cpu_count() or 1)
+
+
+def positive_int(text: str) -> int:
+    n = int(text)
+    if n < 1:
+        raise argparse.ArgumentTypeError(f"must be >= 1, got {n}")
+    return n
+
+
+def inner_jobs(cpus: int, outer: int) -> int:
+    """MUTATION_JOBS to hand the checks when this runner runs `outer` of them at once.
+
+    Two checks (the keycloak client-secret and passkey reconcilers) fan out internally; the
+    other outer-2 workers are single processes. Give the two suites an equal share of the CPUs
+    those others leave free, never fewer than 2 each (a 1-wide pool would make the 40-mutation
+    passkey suite the critical path of the whole stage), never more than 8. Peak process count
+    is then about (outer-2) + 2*inner, i.e. <= cpus on any machine with cpus >= outer + 2, and
+    at worst ~1.25-1.5x cpus on a small runner — CPU-bound oversubscription of that size costs
+    latency per process, not throughput.
+    """
+    if outer <= 1:
+        return min(8, cpus)
+    return max(2, min(8, (cpus - outer + 2) // 2))
+
+
+def run_check(check: Path, env: dict) -> tuple[int, str, float]:
+    t0 = time.monotonic()
+    proc = subprocess.run(
+        ["bash", str(check)], capture_output=True, text=True,
+        stdin=subprocess.DEVNULL, env=env,
+    )
+    return proc.returncode, (proc.stdout + proc.stderr).strip(), time.monotonic() - t0
+
+
 def main() -> int:
    ap = argparse.ArgumentParser(description=__doc__)
    ap.add_argument("--junit", type=Path, required=True)
@@ -108,26 +170,54 @@ def main() -> int:
                         "(makes this runner exit 3); repeatable")
    ap.add_argument("--summary-out", type=Path, default=None,
                    help="write one Markdown line per case here, for the CI step summary")
+    ap.add_argument("--jobs", type=positive_int, default=None,
+                    help="checks to run at once (default: env CONF_OFFLINE_JOBS, else "
+                         "min(8, usable CPUs)); 1 = serial")
    ap.add_argument("dirs", nargs="+", type=Path)
    args = ap.parse_args()

    strict_scopes = set(args.unwired_scope)

-    cases = []  # (name, reqs, dir, rc, output, scope)
+    cpus = usable_cpus()
+    if args.jobs is not None:
+        jobs = args.jobs
+    elif os.environ.get("CONF_OFFLINE_JOBS", "").strip():
+        try:
+            jobs = positive_int(os.environ["CONF_OFFLINE_JOBS"].strip())
+        except (ValueError, argparse.ArgumentTypeError) as e:
+            ap.error(f"CONF_OFFLINE_JOBS={os.environ['CONF_OFFLINE_JOBS']!r}: {e}")
+    else:
+        jobs = min(8, cpus)
+    child_env = dict(os.environ)
+    if not child_env.get("MUTATION_JOBS", "").strip():
+        child_env["MUTATION_JOBS"] = str(inner_jobs(cpus, jobs))
+    print(f"[offline] running {len(args.dirs)} check(s), jobs={jobs} "
+          f"(cpus={cpus}, MUTATION_JOBS={child_env['MUTATION_JOBS']})", file=sys.stderr)
+
+    # Metadata first, in the given order; then the checks themselves through the pool. The
+    # results are consumed in SUBMISSION order, so `cases` is identical to the serial runner's.
+    planned = []  # (name, reqs, dir, scope, check-or-None)
    for d in args.dirs:
        check = next((d / s for s in CHECK_SCRIPTS if (d / s).exists()), None)
        name, reqs = collect_meta(d / "chainsaw-test.yaml", args.label_prefix)
        scope = scope_of(d / "chainsaw-test.yaml", args.scope_annotation)
-        if check is None:
-            cases.append((name, reqs, d, 3,
-                          f"no offline check script ({' or '.join(CHECK_SCRIPTS)}) in {d}",
-                          scope))
-            continue
-        proc = subprocess.run(
-            ["bash", str(check)], capture_output=True, text=True
-        )
-        out = (proc.stdout + proc.stderr).strip()
-        cases.append((name, reqs, d, proc.returncode, out, scope))
+        planned.append((name, reqs, d, scope, check))
+
+    cases = []  # (name, reqs, dir, rc, output, scope)
+    elapsed = []  # wall seconds per case, same order (None: nothing ran)
+    with ThreadPoolExecutor(max_workers=jobs) as pool:
+        futures = [pool.submit(run_check, check, child_env) if check is not None else None
+                   for (_n, _r, _d, _s, check) in planned]
+        for (name, reqs, d, scope, check), fut in zip(planned, futures):
+            if fut is None:
+                cases.append((name, reqs, d, 3,
+                              f"no offline check script ({' or '.join(CHECK_SCRIPTS)}) in {d}",
+                              scope))
+                elapsed.append(None)
+                continue
+            rc, out, secs = fut.result()
+            cases.append((name, reqs, d, rc, out, scope))
+            elapsed.append(secs)

    failures = sum(1 for c in cases if c[3] not in (0, 3))
    skipped = sum(1 for c in cases if c[3] == 3)
@@ -145,7 +235,7 @@ def main() -> int:
        },
    )
    summary_lines = []
-    for name, reqs, d, rc, out, scope in cases:
+    for (name, reqs, d, rc, out, scope), secs in zip(cases, elapsed):
        tc = ET.SubElement(
            suite,
            "testcase",
@@ -164,8 +254,9 @@ def main() -> int:
            fail.text = out
        status = "PASS" if rc == 0 else ("SKIP" if rc == 3 else "FAIL")
        mark = f" scope={scope}" if scope else ""
+        took = f" [{secs:.1f}s]" if secs is not None else ""
        print(f"[offline] {layer_of(d):3s} {status:4s} {name} "
-              f"({','.join(reqs) or 'untagged'}){mark}",
+              f"({','.join(reqs) or 'untagged'}){mark}{took}",
              file=sys.stderr)
        if rc not in (0, 3):
            print(out, file=sys.stderr)
@@ -25,15 +25,19 @@
 #
 #   python3 mutations.py <path-to-extracted-reconciler.py>
 #
-# Runtime is ~20s (one subprocess per mutation, each running the full selftest
-# against an in-process stub Keycloak; no network, no cluster).
+# Runtime is ~11s serial (one subprocess per mutation, each running the full selftest
+# against an in-process stub Keycloak; no network, no cluster). The selftests run in a
+# bounded pool (env MUTATION_JOBS, default min(8, CPUs); 1 = serial); output order and
+# verdicts are independent of the pool size.
 # =============================================================================
 from __future__ import annotations

+import os
 import re
 import subprocess
 import sys
 import tempfile
+from concurrent.futures import ThreadPoolExecutor
 from pathlib import Path


@@ -136,43 +140,99 @@ MUTATIONS: list[tuple[str, str, str, str]] = [
 ]


+def mutation_jobs() -> int:
+    """Selftests to run at once: env MUTATION_JOBS, else min(8, usable CPUs).
+
+    conformance/lib/run_l1_offline.py exports a smaller MUTATION_JOBS when it is itself
+    running several checks in parallel, so the nested pools do not oversubscribe the host.
+    MUTATION_JOBS=1 reproduces the old serial loop exactly.
+    """
+    raw = os.environ.get("MUTATION_JOBS", "").strip()
+    if raw:
+        try:
+            n = int(raw)
+        except ValueError:
+            n = 0
+        if n < 1:
+            raise ValueError("MUTATION_JOBS must be a positive integer, got %r" % raw)
+        return n
+    try:
+        cpus = len(os.sched_getaffinity(0))
+    except (AttributeError, OSError):
+        cpus = os.cpu_count() or 1
+    return max(1, min(8, cpus))
+
+
+def run_selftest(mutated_src: str) -> subprocess.CompletedProcess:
+    with tempfile.NamedTemporaryFile("w", suffix=".py", delete=False) as fh:
+        fh.write(mutated_src)
+        path = fh.name
+    try:
+        return subprocess.run([sys.executable, path, "--selftest"],
+                              capture_output=True, text=True, timeout=240,
+                              stdin=subprocess.DEVNULL)
+    finally:
+        Path(path).unlink(missing_ok=True)
+
+
 def main() -> int:
    if len(sys.argv) != 2:
        print("usage: mutations.py <extracted-reconciler.py>", file=sys.stderr)
        return 2
    src = Path(sys.argv[1]).read_text()

-    problems: list[str] = []
-    killed = 0
+    try:
+        jobs = mutation_jobs()
+    except ValueError as e:
+        print("mutations.py: %s" % e, file=sys.stderr)
+        return 2
+
+    # Pass 1, serial and cheap: every anchor is checked BEFORE anything runs, exactly as the
+    # serial loop did, and each mutation's source is built here. None = anchor failure.
+    planned: list[tuple[str, str, str | None, str | None]] = []
    for name, why, old, new in MUTATIONS:
        old, new = dedent4(old), dedent4(new)
        # An anchor that no longer matches is a FAILURE, not a skip: it means the code
        # moved and this mutation silently stopped proving anything.
        n = src.count(old)
        if n != 1:
-            problems.append("%s: anchor matches %d times (expected exactly 1) -- the "
+            planned.append((name, why,
+                            "%s: anchor matches %d times (expected exactly 1) -- the "
                            "code moved and this mutation no longer proves anything. "
-                            "Re-anchor it against the current source." % (name, n))
+                            "Re-anchor it against the current source." % (name, n), None))
            continue
-        with tempfile.NamedTemporaryFile("w", suffix=".py", delete=False) as fh:
-            fh.write(src.replace(old, new, 1))
-            path = fh.name
-        try:
-            proc = subprocess.run([sys.executable, path, "--selftest"],
-                                  capture_output=True, text=True, timeout=240)
-        finally:
-            Path(path).unlink(missing_ok=True)
-        if proc.returncode == 0:
-            problems.append("%s SURVIVED -- --selftest still passed with this regression "
-                            "applied, so nothing in the suite actually checks it. The "
-                            "mistake it models: %s" % (name, why))
-            continue
-        killed += 1
-        out = proc.stdout + proc.stderr
-        m = re.search(r"SELFTEST FAIL: (\d+) of \d+", out)
-        how = ("%s assertion(s) caught it" % m.group(1) if m
-               else "the selftest aborted (caught, less cleanly)")
-        print("  killed  %-42s %s" % (name, how))
+        planned.append((name, why, None, src.replace(old, new, 1)))
+
+    # Pass 2: the selftests, `jobs` at a time. Each child gets its own temp file, its own
+    # mkdtemp dirs and its own 127.0.0.1:0 stub port, so they share nothing. Results are
+    # consumed in MUTATIONS order, so every line below is printed in the same order, with the
+    # same verdict, as the serial loop produced -- whichever child finishes first.
+    problems: list[str] = []
+    killed = 0
+    pool = ThreadPoolExecutor(max_workers=jobs)
+    try:
+        futures = [pool.submit(run_selftest, mutated) if mutated is not None else None
+                   for (_n, _w, _a, mutated) in planned]
+        for (name, why, anchor_problem, _m), fut in zip(planned, futures):
+            if anchor_problem is not None:
+                problems.append(anchor_problem)
+                continue
+            proc = fut.result()
+            if proc.returncode == 0:
+                problems.append("%s SURVIVED -- --selftest still passed with this regression "
+                                "applied, so nothing in the suite actually checks it. The "
+                                "mistake it models: %s" % (name, why))
+                continue
+            killed += 1
+            out = proc.stdout + proc.stderr
+            m = re.search(r"SELFTEST FAIL: (\d+) of \d+", out)
+            how = ("%s assertion(s) caught it" % m.group(1) if m
+                   else "the selftest aborted (caught, less cleanly)")
+            print("  killed  %-42s %s" % (name, how))
+    finally:
+        # A timeout (or any other exception) still propagates and fails the check, as it did
+        # serially; queued mutations are cancelled rather than run for nothing.
+        pool.shutdown(wait=True, cancel_futures=True)

    print()
    if problems:
@@ -40,15 +40,19 @@
 #
 #   python3 mutations.py <path-to-extracted-reconciler.py>
 #
-# Runtime is ~60s (one subprocess per mutation, each running the full selftest
-# against an in-process stub Keycloak; no network, no cluster).
+# Runtime is ~85s serial (one subprocess per mutation, each running the full selftest
+# against an in-process stub Keycloak; no network, no cluster). The selftests run in a
+# bounded pool (env MUTATION_JOBS, default min(8, CPUs); 1 = serial); output order and
+# verdicts are independent of the pool size.
 # =============================================================================
 from __future__ import annotations

+import os
 import re
 import subprocess
 import sys
 import tempfile
+from concurrent.futures import ThreadPoolExecutor
 from pathlib import Path

 # (name, the mistake being modelled, anchor, replacement)
@@ -403,42 +407,98 @@ MUTATIONS: list[tuple[str, str, str, str]] = [
 ]


+def mutation_jobs() -> int:
+    """Selftests to run at once: env MUTATION_JOBS, else min(8, usable CPUs).
+
+    conformance/lib/run_l1_offline.py exports a smaller MUTATION_JOBS when it is itself
+    running several checks in parallel, so the nested pools do not oversubscribe the host.
+    MUTATION_JOBS=1 reproduces the old serial loop exactly.
+    """
+    raw = os.environ.get("MUTATION_JOBS", "").strip()
+    if raw:
+        try:
+            n = int(raw)
+        except ValueError:
+            n = 0
+        if n < 1:
+            raise ValueError("MUTATION_JOBS must be a positive integer, got %r" % raw)
+        return n
+    try:
+        cpus = len(os.sched_getaffinity(0))
+    except (AttributeError, OSError):
+        cpus = os.cpu_count() or 1
+    return max(1, min(8, cpus))
+
+
+def run_selftest(mutated_src: str) -> subprocess.CompletedProcess:
+    with tempfile.NamedTemporaryFile("w", suffix=".py", delete=False) as fh:
+        fh.write(mutated_src)
+        path = fh.name
+    try:
+        return subprocess.run([sys.executable, path, "--selftest"],
+                              capture_output=True, text=True, timeout=300,
+                              stdin=subprocess.DEVNULL)
+    finally:
+        Path(path).unlink(missing_ok=True)
+
+
 def main() -> int:
    if len(sys.argv) != 2:
        print("usage: mutations.py <extracted-reconciler.py>", file=sys.stderr)
        return 2
    src = Path(sys.argv[1]).read_text()

-    problems: list[str] = []
-    killed = 0
+    try:
+        jobs = mutation_jobs()
+    except ValueError as e:
+        print("mutations.py: %s" % e, file=sys.stderr)
+        return 2
+
+    # Pass 1, serial and cheap: every anchor is checked BEFORE anything runs, exactly as the
+    # serial loop did, and each mutation's source is built here. None = anchor failure.
+    planned: list[tuple[str, str, str | None, str | None]] = []
    for name, why, old, new in MUTATIONS:
        # An anchor that no longer matches is a FAILURE, not a skip: it means the code
        # moved and this mutation silently stopped proving anything.
        n = src.count(old)
        if n != 1:
-            problems.append("%s: anchor matches %d times (expected exactly 1) -- the "
+            planned.append((name, why,
+                            "%s: anchor matches %d times (expected exactly 1) -- the "
                            "code moved and this mutation no longer proves anything. "
-                            "Re-anchor it against the current source." % (name, n))
+                            "Re-anchor it against the current source." % (name, n), None))
            continue
-        with tempfile.NamedTemporaryFile("w", suffix=".py", delete=False) as fh:
-            fh.write(src.replace(old, new, 1))
-            path = fh.name
-        try:
-            proc = subprocess.run([sys.executable, path, "--selftest"],
-                                  capture_output=True, text=True, timeout=300)
-        finally:
-            Path(path).unlink(missing_ok=True)
-        if proc.returncode == 0:
-            problems.append("%s SURVIVED -- --selftest still passed with this regression "
-                            "applied, so nothing in the suite actually checks it. The "
-                            "mistake it models: %s" % (name, why))
-            continue
-        killed += 1
-        out = proc.stdout + proc.stderr
-        m = re.search(r"SELFTEST FAIL: (\d+) of \d+", out)
-        how = ("%s assertion(s) caught it" % m.group(1) if m
-               else "the selftest aborted (caught, less cleanly)")
-        print("  killed  %-54s %s" % (name, how))
+        planned.append((name, why, None, src.replace(old, new, 1)))
+
+    # Pass 2: the selftests, `jobs` at a time. Each child gets its own temp file, its own
+    # mkdtemp dirs and its own 127.0.0.1:0 stub port, so they share nothing. Results are
+    # consumed in MUTATIONS order, so every line below is printed in the same order, with the
+    # same verdict, as the serial loop produced -- whichever child finishes first.
+    problems: list[str] = []
+    killed = 0
+    pool = ThreadPoolExecutor(max_workers=jobs)
+    try:
+        futures = [pool.submit(run_selftest, mutated) if mutated is not None else None
+                   for (_n, _w, _a, mutated) in planned]
+        for (name, why, anchor_problem, _m), fut in zip(planned, futures):
+            if anchor_problem is not None:
+                problems.append(anchor_problem)
+                continue
+            proc = fut.result()
+            if proc.returncode == 0:
+                problems.append("%s SURVIVED -- --selftest still passed with this regression "
+                                "applied, so nothing in the suite actually checks it. The "
+                                "mistake it models: %s" % (name, why))
+                continue
+            killed += 1
+            out = proc.stdout + proc.stderr
+            m = re.search(r"SELFTEST FAIL: (\d+) of \d+", out)
+            how = ("%s assertion(s) caught it" % m.group(1) if m
+                   else "the selftest aborted (caught, less cleanly)")
+            print("  killed  %-54s %s" % (name, how))
+    finally:
+        # A timeout (or any other exception) still propagates and fails the check, as it did
+        # serially; queued mutations are cancelled rather than run for nothing.
+        pool.shutdown(wait=True, cancel_futures=True)

    print()
    if problems:
@@ -62,7 +62,7 @@ spec:
        ports:
        - containerPort: 8080
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -85,7 +85,7 @@ spec:
        - name: config
          mountPath: /data/config
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -85,7 +85,7 @@ spec:
        - name: config
          mountPath: /data/config
      - name: oauth2-proxy
-        image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+        image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
        imagePullPolicy: IfNotPresent
        args:
        - --http-address=0.0.0.0:4180
@@ -1,60 +0,0 @@
---
-date: 2026-11-08
-branch: fix/keycloak-servicemonitor-owner
-title: One owner for the keycloak ServiceMonitor — disable the 26.8 operator's (409 loop stalled platform-config)
---
-
-## What changed
-
- `platform/keycloak/keycloak-instance.yaml`: added `spec.serviceMonitor.enabled: false`.
-  The 26.x Keycloak operator creates its own ServiceMonitor, named after the CR (`keycloak/keycloak`),
-  whenever `metrics-enabled=true` and the ServiceMonitor CRD exists. `serviceMonitor.enabled` defaults
-  to `true` in the 26.8.2 CRD, both in v2alpha1 and in v2beta1 (v2beta1 is now the storage version).
-  That is the same name and namespace as the repo's Flux-owned `platform/keycloak/servicemonitor.yaml`.
-  After the 26.0.6 -> 26.8.2 bump (#121/#144) the operator's PATCH against it returned
-  `409 Conflict` and it ran out of retries. The CR then sat at `Ready=False`/`HasErrors=True`, and
-  `platform-config` (`wait: true`, which health-checks every object it applies, this CR included)
-  blocked everything that `dependsOn` it: velero, apps-vms, apps-wave-0 (and so waves 1/2 and
-  pm-agent), homepage, oauth2-proxy, headlamp, conformance, vpn-ingress, crafty, runbooks.
- `platform/keycloak/servicemonitor.yaml`: a comment saying it is the sole owner.
- **Why ours is kept:** these are written against it: the L0 `servicemonitor-ports-resolve`
-  allow-list entry `platform/keycloak/servicemonitor.yaml:keycloak`, the L2 `keycloak-monitored`
-  chainsaw test, the README's ownership table, and the dashboard's `up{namespace="keycloak"}`.
-  The operator's version (upstream `KeycloakServiceMonitorDependentResource` @26.8.2) scrapes the same
-  target: port name `management` (9000 on `keycloak-service`), path `/metrics`, interval 30s,
-  selector = the operator's instance labels. It offers nothing ours lacks, so having two owners
-  would add a fight and gain nothing.
-
-## What I verified
-
- Live, read-only, `k3s-prod` ~06:25Z: the CRD schema field `spec.serviceMonitor.enabled`
-  (`default: true`) exists in both served versions. The live `keycloak` ServiceMonitor has exactly
-  **one** managedFields manager, `kustomize-controller` (Apply, 2026-09-05), **no ownerReferences**,
-  and labels `kustomize.toolkit.fluxcd.io/name=platform-config`, `release=kube-prometheus-stack`. So
-  the operator's apply never landed, and nothing on the object ties it to the Keycloak CR.
- The ServiceMonitor will not be deleted when the operator is switched off: the operator's dependent
-  informer is filtered on `Constants.DEFAULT_LABELS_AS_STRING`
-  (`app.kubernetes.io/managed-by=keycloak-operator`). Our object does not carry that label and has
-  no ownerReference, so the operator cannot see it as its secondary and cannot delete or GC it.
-  This conclusion comes from reading the code. It was not observed.
- The other operator dependents in ns `keycloak` do not collide with anything: `keycloak-service`,
-  `keycloak-discovery`, the StatefulSet `keycloak`, `keycloak-initial-admin`, and
-  `keycloak-network-policy` (owner Keycloak, no Flux label). The repo declares none of these names.
-  It only *references* `keycloak-service` by name (HTTPRoute, reconcilers). There are no PDBs in the
-  namespace, and the Ingress is already `enabled: false`. The only NetworkPolicy in the namespace is
-  the operator's. The repo has no Keycloak NetworkPolicy, and no Kyverno-generated default-deny is
-  present there. NetworkPolicies add up, so the operator's allow-policy cannot fight another owner.
-  Left at its default.
- Local gate: see the PR body. It records the rc and stages.
-
-## What I did NOT verify
-
- That the CR reaches `Ready=True`/`HasErrors=False` after merge. The status also says
-  "Performing Keycloak upgrade, scaling down the deployment". I am inferring that this half clears
-  once the workflow stops erroring. It is not proven.
- That the operator stops issuing the PATCH once `enabled: false` is applied. Watch the operator
-  logs for 409.
- That `platform-config` and its downstream Kustomizations go Ready on the new revision, and that
-  Prometheus keeps exactly one `serviceMonitor/keycloak/keycloak/0` pool with targets up.
- The operator's actual label set for `DEFAULT_LABELS_AS_STRING`. I took it from the observed labels
-  on operator-created objects, not from `Constants.java`.
@@ -0,0 +1,116 @@
+---
+date: 2026-11-08
+branch: feat/parallel-l0-checks
+title: L0 offline checks, mutation suites and yamllint run in bounded parallel pools (gate 184s -> 32s locally)
+---
+
+## What changed
+
+The gate's wall time was dominated by serial loops over independent subprocesses. Three of
+them now run in bounded pools; none of them changes a verdict, an exit code, or the order of
+anything printed.
+
+- `conformance/lib/run_l1_offline.py` — the per-check loop (L0 and L1 offline checks) runs in
+  a `ThreadPoolExecutor` of `bash <check>` children. `--jobs N` / env `CONF_OFFLINE_JOBS`,
+  default `min(8, usable CPUs)` (`sched_getaffinity`, so a cgroup cpuset is respected);
+  `--jobs 1` is the old serial runner. Results are consumed in SUBMISSION order, so `cases`,
+  the JUnit, the step summary and the 0/1/3 aggregation are built from exactly the same
+  ordered list as before. Additive output only: one `[offline] running N check(s), jobs=…`
+  line, and a trailing `[N.Ns]` wall time on each per-check status line. Children get
+  `stdin=/dev/null` (parallel children must not share the runner's stdin).
+- `conformance/tests/l0-static/keycloak-{passkey,client-secret}-reconciler/mutations.py` —
+  pass 1 (serial) checks every anchor and builds each mutated source, exactly as before;
+  pass 2 runs the `--selftest` children in a pool (env `MUTATION_JOBS`, default
+  `min(8, CPUs)`, `1` = serial). Verdicts are consumed in `MUTATIONS` order. A timeout
+  (`TimeoutExpired`) still propagates and fails the check; queued mutations are cancelled.
+  An invalid `MUTATION_JOBS` exits 2 (fails the check, never skips it).
+- **Nested-pool budget.** When the outer runner is parallel it exports
+  `MUTATION_JOBS = max(2, min(8, (cpus - jobs + 2) // 2))` unless the caller already set
+  one. Reason: only those two checks fan out; the other `jobs-2` workers are single
+  processes, so the two suites split the CPUs those leave free. Peak processes ≈
+  `(jobs-2) + 2*inner` ≤ cpus whenever cpus ≥ jobs+2 (24 CPUs: 6 + 16 = 22), and ~1.25–1.5×
+  cpus on a small runner (4 CPUs: 2 + 4 = 6). The floor of 2 is deliberate: a 1-wide inner
+  pool would make the 40-mutation passkey suite (~85s serial) the critical path of the stage.
+- `ci/lint.sh` — yamllint runs over `LINT_JOBS` (default `min(8, nproc)`) CONTIGUOUS slices
+  of the sorted file list concurrently; each slice's output is buffered to its own file and
+  printed in slice order, so the text is the same as one serial call and a `file` header is
+  never separated from its `line:col` findings. Stage rc = the highest slice rc; a slice that
+  leaves no rc file counts as 1. Invalid `LINT_JOBS` exits 2.
+
+### Parallel-safety audit (all 25 `l0-static/*/check.sh`, 3 `l1-rendering/*/render-check.sh`)
+
+Grepped every check for fixed `/tmp` paths, `_artifacts`/`ARTIFACTS`/`COVERAGE_OUT`,
+`write_text`/`open(…,"w")`, `mktemp`/`mkdtemp`/`TemporaryDirectory`, sockets/ports, `git`
+writes and `run.sh` invocations, and read what each writer writes to:
+
+- **Scratch state: all private.** Every writer uses its own `mktemp -d` / `mkdtemp` /
+  `TemporaryDirectory` (placeholder-guard-coupling, spec-immutability-enforced,
+  whole-repo-invariants-wired, auditability-proofs-producible, alert-rules-unit-tested and its
+  `platform/monitoring/tests/run.sh`, internal-services-publish-no-public-dns,
+  oauth2-proxy-{api-routes-per-app,cookie-names-distinct}, both keycloak reconcilers, the three
+  L1 render checks). No fixed `/tmp` path anywhere.
+- **Git writes:** only spec-immutability-enforced, and only `git init/add/commit` inside its
+  own `mktemp` repo. Everything else is `git ls-files`/`ls-tree`/`log`/`rev-parse` (read-only).
+- **Ports:** the reconciler selftests bind `127.0.0.1:0` (kernel-assigned); the passkey
+  selftest also dials `127.0.0.1:1` as a deliberate refused connection. No fixed listener.
+- **Ansible** (dev-nodes-provisioned-as-code): `--syntax-check`/`--list-hosts` only,
+  `retry_files_enabled = False`; its local tmp is per-process.
+- **The one shared writer:** auditability-proofs-producible runs
+  `./run.sh --coverage-only --requirements …`, which REWRITES
+  `conformance/_artifacts/coverage/coverage.{json,md}` (it inherits `CONF_ARTIFACTS`). That was
+  already true serially. No other offline check reads or writes that directory (the only
+  reader is `tests/meta/harness-selfcheck`, not an offline check), and the outer runner
+  writes coverage BEFORE and the JUnit AFTER the pool, so the final state is the same as
+  serial. Not serialised; left as is and recorded here. `lib/status.py` (run by that check)
+  reads `_artifacts/report.junit.xml` as an advisory — written only after the pool, unchanged.
+- whole-repo-invariants-wired calls `run.sh --print-selection` (writes nothing) and the
+  runner itself against synthetic dirs in its own `mktemp`.
+
+Result: no check needed fixing or serialising. A new check that needs shared state must say
+so; the runner's docstring now states that contract.
+
+## What I verified
+
+All in the pinned toolbox (`dev.sh run`, `DEV_KUBECONFIG=/dev/null`, ENGINE shim adding a ro
+mount of the main checkout's `.git`; spec repo resolved as a sibling, spec-immutability
+`pass`), host 24 CPUs, every `dev.sh` call under `flock`.
+
+- **Gate, before** (origin/main `1a33814`, detached scratch worktree + spec mount):
+  `GATE_RC=3`, in-container wall **183.9s**; `l0` stage **168.3s**, `lint` **7.8s**.
+  "Stages that did not run: gitea-settings" (plus the expected on-base
+  touched-set-not-determinable note, since main has no branch commits).
+- **Gate, after** (this branch, commit `a775082`): `GATE_RC=3`, in-container wall **32.1s**;
+  `l0` **21.1s**, `lint` **2.4s**, `l1` 2.3s. "Stages that did not run: gitea-settings" — the
+  only not-run stage. **rc 3, not green.** Caveat: the branch run selected 23 L0 checks (the
+  touched-requirement scoping dropped dev-nodes-provisioned-as-code and
+  placeholder-guard-coupling), the main run 25.
+- **Same-tree L0 comparison** (all 25 l0 dirs, same tree, same container):
+  `CONF_OFFLINE_JOBS=1 MUTATION_JOBS=1` **164.0s / 165.3s** vs default (jobs=8,
+  MUTATION_JOBS=8) **19.2s / 18.7s**. JUnit `cmp`-identical, step summary `cmp`-identical,
+  stderr identical except the timing suffixes and the JUnit path in the last line.
+- **Mutation suites, host:** passkey 83.2s → 10.5s (`MUTATION_JOBS=8`), client-secret
+  11.2s → 2.0s; output of `MUTATION_JOBS=1` and `=8` byte-identical to the pre-change script's,
+  rc 0 all round.
+- **Falsification (not committed):** in a scratch worktree at `a775082`, made the passkey
+  mutation "the protected-subtree screen is never called" a no-op (replacement == anchor).
+  Host: `MUTATION_JOBS=1` and `=8` both rc 1, output byte-identical (with a second, broken
+  anchor also injected: both reported). Toolbox: runner rc 1 both serial and parallel,
+  `L0 FAIL keycloak-passkey-reconciler … 1 of 40 mutation(s) not proven … SURVIVED`; full
+  gate **rc 1**, `stage l0: FAIL`, `MERGE GATE: BLOCKED`. Reverted; scratch worktree removed.
+- **lint.sh, host scratch repo** (31 YAML files, two broken): `LINT_JOBS=1/4/8` all rc 1,
+  stdout identical, findings named `y/f07.yaml` / `2:1 … key-duplicates` etc.; clean tree rc 0;
+  `LINT_JOBS=x` rc 2.
+
+## What I did NOT verify
+
+- **CI timings at the time of writing.** The PR's CI run is measured after push and reported
+  on the PR / handoff message, not here. The CI runner's CPU count is UNVERIFIED — the new
+  `[offline] running … jobs=… cpus=…` line in the CI log is what will show it. On a small
+  runner the speedup will be smaller than locally.
+- **approval-policy** will be red on CI: `ci/**` and `conformance/**` are sensitive paths and
+  need the operator's review. I did not and must not override it.
+- Flakiness under load: the selftests have no wall-clock assertions I found, and 4 toolbox
+  runs + several host runs were all stable, but that is a handful of runs, not a soak.
+- The coverage files under `conformance/_artifacts/coverage/` end in the same state as before
+  only because a single check rewrites them; I did not change that pre-existing quirk.
+- L2/L3 conformance: not run (no cluster in CI, as before).
@@ -1,48 +0,0 @@
---
-date: 2026-11-08
-branch: rework/136
-title: "PR #136 rework: regenerate L1 render goldens for the oauth2-proxy v7.15.6 sidecar bump"
---
-
-## What changed
-
- Renovate PR #136 bumps `OAUTH2_PROXY_IMAGE` in `catalog/render.py` (and the generated
-  `apps/wave-*` / `platform/crafty` pins) from `v7.8.1` to `v7.15.6`. Its gate failed at L1
-  because three byte-for-byte render goldens still carried the old tag:
-  - `conformance/tests/l1-rendering/container-workload-render/golden/expected.yaml`
-  - `conformance/tests/l1-rendering/egress-class-render/golden/egress-vpn.expected.yaml`
-  - `conformance/tests/l1-rendering/egress-class-render/golden/egress-internet.expected.yaml`
-    (CI only reported the vpn one because `render-check.sh` stops at the first failing diff;
-    the internet golden had drifted too.)
- Regenerated all three in the pinned toolbox with the exact invocation the check scripts use:
-  `python3 catalog/render.py <fixture> > <golden>`. The diff in each is **one line**:
-  `image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1` -> `...:v7.15.6`. Nothing else moved.
- `platform/crafty/README.md`: the "Sidecar" row described the current pin; updated to v7.15.6.
- Deliberately NOT changed (they record history, not the current pin):
-  - `catalog/render.py` comments / assertion messages saying a flag was "confirmed present in the
-    PINNED v7.8.1 binary" or that `--api-routes` "does not exist in v7.8.1". Rewriting them to
-    v7.15.6 would assert a `--help` verification nobody has done against v7.15.6.
-  - `conformance/tests/l0-static/oauth2-proxy-api-routes-per-app/check.sh`, the schema
-    description, `runbooks/oauth2-proxy-session.md`, `docs/plans/...` — same reasoning.
-  - `platform/oauth2-proxy/auth-visibility-alerts.promtool-test.yaml` — v7.8.1 appears in
-    synthetic kube-state-metrics series (test input data), not as a pin.
-  - `.gitea/workflows/renovate.yaml` comment — a dated measurement of the pre-Renovate state.
- Branch was 55 commits behind `origin/main`, but main touches neither `catalog/render.py` nor
-  the L1 goldens, and the merge is conflict-free; no merge of main was needed for the gate.
-
-## What I verified
-
- The golden diff is exactly the image tag in each of the three files (`git diff -U0`).
- No remaining `oauth2-proxy:v7.8.1` in any rendered/generated/golden file (`git grep`).
- Local toolbox gate result: see the PR #136 comment posted with this push (rc and per-stage
-  results are quoted there and in the worker report).
-
-## What I did NOT verify
-
- That the v7.15.6 sidecar actually starts and authenticates in the cluster with the rendered
-  args. Earlier research said no flag used here was removed/renamed between 7.8.1 and 7.15.6;
-  I did not re-run `oauth2-proxy --help` against the v7.15.6 image.
- L2/L3 conformance (does not run in CI: `CLUSTER_AVAILABLE` unset).
- `approval-policy`: `conformance/**` is a sensitive path, so this PR is CI-red until the
-  operator posts `/approve-override <reason>` as a PR review. The local gate cannot evaluate it.
- Whether Renovate keeps rebasing this branch now that it carries a non-Renovate commit.
@@ -16,7 +16,7 @@ Cilium L2 LoadBalancer (game protocols authenticate players themselves).
 |---|---|
 | Image | `registry.gitlab.com/crafty-controller/crafty-4:4.10.8` (current stable; bare-semver tags, no `v`) |
 | Web UI | HTTPS **self-signed** on `:8443` (reached only via the sidecar / same-pod) |
-| Sidecar | `quay.io/oauth2-proxy/oauth2-proxy:v7.15.6`, reverse-proxy on `:4180` |
+| Sidecar | `quay.io/oauth2-proxy/oauth2-proxy:v7.8.1`, reverse-proxy on `:4180` |
 | Data | ONE Longhorn RWO PVC `crafty-data` (20Gi), mounted 5× by subPath |
 | PVC subPaths | `servers`→`/crafty/servers`, `backups`→`/crafty/backups`, `logs`→`/crafty/logs`, `import`→`/crafty/import`, `config`→`/crafty/app/config` |
 | Identity | `runAsUser:1000 runAsGroup:0 fsGroup:0 runAsNonRoot:true` (see below) |
@@ -130,7 +130,7 @@ spec:
        - name: oauth2-proxy
          # quay.io/oauth2-proxy/oauth2-proxy — same authenticator family as platform/oauth2-proxy, but
          # here in per-app REVERSE-PROXY mode (--upstream is the co-located Crafty UI, not static://202).
-          image: quay.io/oauth2-proxy/oauth2-proxy:v7.15.6
+          image: quay.io/oauth2-proxy/oauth2-proxy:v7.8.1
          imagePullPolicy: IfNotPresent
          args:
            - --http-address=0.0.0.0:4180
@@ -38,20 +38,6 @@ spec:
  ingress:
    enabled: false                         # exposed via Gateway API HTTPRoute (httproute.yaml), not the
                                           # operator's built-in Ingress
-  # --- ONE OWNER for the `keycloak` ServiceMonitor: this repo (servicemonitor.yaml), not the operator.
-  #     Since 26.x the operator creates its OWN ServiceMonitor, named after this CR (`keycloak`, i.e.
-  #     the SAME name/namespace as ours), whenever metrics-enabled=true and the CRD exists —
-  #     spec.serviceMonitor.enabled defaults TRUE. On 2026-11-08, right after the 26.0.6 -> 26.8.2
-  #     bump, its server-side apply onto our Flux-owned object failed `409 Conflict`, the operator
-  #     exhausted retries, the CR sat Ready=False/HasErrors=True, and `platform-config` (wait: true,
-  #     so it health-checks this CR) stalled every Kustomization downstream of it. Ours is kept
-  #     because the L0 servicemonitor-ports-resolve and L2 keycloak-monitored conformance tests and
-  #     the dashboard's up{namespace="keycloak"} are written against it; the operator's would scrape
-  #     the same thing (management port 9000, /metrics, 30s). Do NOT flip this to true without
-  #     deleting servicemonitor.yaml in the same change — two owners of one object is a fight
-  #     (cf. the default-deny NetworkPolicy drift loop).
-  serviceMonitor:
-    enabled: false
  # --- Hardening + observability options (docs/15). Brute-force detection is a REALM setting
  #     (bruteForceProtected in the realm import); these enable health + metrics endpoints. ---
  additionalOptions:
@@ -8,9 +8,6 @@
 # /metrics) once metrics-enabled/health-enabled are set (see keycloak-instance.yaml additionalOptions).
 # We select the operator-created keycloak-service (which selects the Keycloak pods) and scrape the pods'
 # management port by number via targetPort.
-# SOLE OWNER: the operator's own ServiceMonitor (same name `keycloak`) is switched OFF in
-#   keycloak-instance.yaml (spec.serviceMonitor.enabled: false) — 26.x defaults it ON and its apply
-#   409-looped against this object on 2026-11-08. Keep exactly one of the two.
 # TODO(WS-SEC, bring-up): confirm the management port number/name the operator exposes (9000 default)
 #   and adjust targetPort if the pinned operator changes it. The KeycloakDown / KeycloakDatabaseDown
 #   alerts (platform/monitoring/alerts.yaml) key on kube-state-metrics and fire regardless of this SM.