fleet/ohm: pkgrel=6 reproducible from manifest (cumulative-pkgrel6-danctnix)

Replace the pkgrel=3-era cumulative-c5x-danctnix include with
cumulative-pkgrel6-danctnix — a single squashed diff representing
the bes2600 driver source state on ohm as of 2026-05-21.

Also drop:
- arch/arm64/scs-arm-neon-build-fix/ (removed in pkgrel=4)
- driver/bes2600/queue-pending-record-lock-bh-danctnix/ (in cumulative)
- driver/bes2600/tx-sdio-dma-oob-danctnix/ (in cumulative)
- driver/bes2600/join-confirm-reset-danctnix/ (in cumulative)

Resulting manifest: just two includes:
  driver/bes2600/cumulative-pkgrel6-danctnix/
  driver/bes2600/scan-filter-5ghz-danctnix/

Verified: ka-promote ohm produces a 136KB cumulative.patch that,
when applied to a fresh v7.0-danctnix1 staging tree, yields
drivers/staging/bes2600 source bit-identical to the pkgrel=6 build
on boltzmann. The only diff is build artifacts (.o, .cmd, .mod, etc.).

Kernel-agent can now generate the ohm-live source state without
reaching into the besser repository.

Closes ka#29 (per-series reconstruction tracking issue) by
delivering the deterministic-rebuild capability the original
per-series mirrors were meant to provide.

Signed-off-by: Claude (noether) <claude@reauktion.de>

README.md

@@ -264,8 +264,8 @@ build. `ka-promote` (issue #22) replaced the manual step #1 below as of 2026-05-
 |---|---|---|
 | `ka-import fresnel-fourier <patches> --to board/pinebook-pro` (originally named `ka-promote` in this row) | Authored 3 patches with proper headers/scope tags, pushed to `marfrit/kernel-agent/patches/board/pinebook-pro/` via Gitea contents API as `claude-noether`. | still manual — `ka-import` unimplemented |
 | `ka-promote fresnel` (new — manifest → cumulative.patch + manifest.lock) | n/a (didn't exist) | **automated 2026-05-18, issue #22** |
-| `ka-build fresnel` | On boltzmann: cloned linux v7.0 from kernel.org, ran `makepkg -s --skipchecksums --skippgpcheck` against `marfrit-packages/arch/linux-fresnel-fourier/PKGBUILD`. Native aarch64 (boltzmann is RK3588). One headers-pkg bug discovered (`ln -sr` on missing parent dir) and fixed mid-flight. Repackaged. | still manual — next verb to implement |
+| `ka-build fresnel` | On boltzmann: cloned linux v7.0 from kernel.org, ran `makepkg -s --skipchecksums --skippgpcheck` against `marfrit-packages/arch/linux-fresnel-fourier/PKGBUILD`. Native aarch64 (boltzmann is RK3588). One headers-pkg bug discovered (`ln -sr` on missing parent dir) and fixed mid-flight. Repackaged. | **automated 2026-05-19, issue #34** — `ka-build <host>` ssh-dispatches makepkg to `build_host.primary`, verifies kernel-agent patches still match the PKGBUILD-side files (b2sum cross-check from `manifest.lock`), and pulls the resulting `*.pkg.tar.zst` back. |
-| `ka-sign + push` | scp pkgs hertz → `sudo /opt/herding/bin/marfrit-publish-arch aarch64 <pkg>` per pkg. Script signs with key `92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C`, runs repo-add, rsyncs to nc. | still manual — folded into `ka-build` |
+| `ka-sign + push` | scp pkgs hertz → `sudo /opt/herding/bin/marfrit-publish-arch aarch64 <pkg>` per pkg. Script signs with key `92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C`, runs repo-add, rsyncs to nc. | **folded into `ka-build` 2026-05-19** — `ka-build` scp's each pkg to hertz and runs `marfrit-publish-arch` over ssh. `--skip-publish` flag retained for offline builds. |
 | `ka-install fresnel` (consent-via-action) | `sudo pacman -U /tmp/<pkg>` over LAN scp (HTTPS to nc was throttled by fresnel's wifi). pacman post-transaction hook updated extlinux. mkinitcpio run manually because the standard hook trigger watches `vmlinuz` not `Image`. | still manual — last verb to implement |
 | Bar 1..3 verification | SSH heartbeat OK, `pacman -Q linux-fresnel-fourier` = `7.0-1`, post-reboot cluster0 1.704 GHz / cluster1 2.184 GHz confirmed. | folded into `ka-install` |
 

bin/ka-build

@@ -0,0 +1,199 @@
+#!/usr/bin/env bash
+# ka-build — render PKGBUILD from manifest.lock, build native on host,
+# sign+publish via marfrit-publish-arch on hertz.
+#
+# Phase-1 (issue #34): arch makepkg wrapper. Debian path deferred.
+#
+# Usage:
+#   ka-build <host>
+#   ka-build <host> --packages-repo <path>    # default: ~/src/marfrit-packages
+#   ka-build <host> --dry-run                 # stop after staging, don't makepkg
+#   ka-build <host> --skip-publish            # build only, don't push to hertz
+#
+# Exit codes:
+#   0  success (pkg built + published)
+#   2  missing input (manifest.lock, PKGBUILD, ssh target)
+#   3  patch drift (resolved.sha256 != PKGBUILD-side file sha256)
+#   4  makepkg / sign / publish failure
+#   5  manifest parse error
+
+set -euo pipefail
+
+VERSION=1
+
+die() { echo "ka-build: error: $1" >&2; exit "${2:-1}"; }
+note() { echo "ka-build: $1"; }
+
+# Defaults
+PACKAGES_REPO="${KA_PACKAGES_REPO:-${HOME}/src/marfrit-packages}"
+DRY_RUN=0
+SKIP_PUBLISH=0
+HOST=""
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+        --packages-repo) PACKAGES_REPO="$2"; shift 2 ;;
+        --dry-run) DRY_RUN=1; shift ;;
+        --skip-publish) SKIP_PUBLISH=1; shift ;;
+        --version) echo "ka-build version $VERSION"; exit 0 ;;
+        -h|--help) sed -n '1,30p' "$0" | grep -E '^# ' | sed 's/^# //'; exit 0 ;;
+        -*) die "unknown flag: $1" ;;
+        *) [ -z "$HOST" ] && HOST="$1" || die "extra arg: $1"; shift ;;
+    esac
+done
+
+[ -n "$HOST" ] || die "host is required" 2
+[ -d "$PACKAGES_REPO" ] || die "--packages-repo not found: $PACKAGES_REPO" 2
+
+# Locate kernel-agent repo root (where bin/ + fleet/ live)
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$script_dir/.." && pwd)"
+[ -d "$REPO_ROOT/fleet" ] || die "fleet/ not found relative to $script_dir" 2
+
+manifest="$REPO_ROOT/fleet/${HOST}.yaml"
+[ -f "$manifest" ] || die "no manifest for host '$HOST': $manifest" 2
+
+# Read fields from manifest via python (yaml in bash is masochism)
+py_read() {
+    python3 -c "
+import sys, yaml, os
+m = yaml.safe_load(open('$manifest'))
+keys = '$1'.split('.')
+v = m
+for k in keys:
+    if not isinstance(v, dict) or k not in v: sys.exit('missing key: $1')
+    v = v[k]
+print(v)
+"
+}
+
+PKG_NAME="$(py_read package.name)"
+BASELINE_REF="$(py_read baseline.ref)"
+BUILD_HOST="$(py_read build_host.primary)"
+
+# Locate the most recent ka-promote output
+build_dir_root="${KA_BUILD_DIR:-$REPO_ROOT/build}"
+promote_out="${build_dir_root}/${HOST}/${BASELINE_REF}"
+lock="${promote_out}/manifest.lock"
+cumulative="${promote_out}/cumulative.patch"
+[ -f "$lock" ] || die "no manifest.lock at $lock — run 'ka-promote $HOST' first" 2
+[ -f "$cumulative" ] || die "no cumulative.patch at $cumulative — run 'ka-promote $HOST' first" 2
+
+# Locate the PKGBUILD
+pkg_dir="${PACKAGES_REPO}/arch/${PKG_NAME}"
+pkgbuild="${pkg_dir}/PKGBUILD"
+[ -f "$pkgbuild" ] || die "no PKGBUILD at $pkgbuild (expected from manifest package.name)" 2
+
+note "host=$HOST pkg=$PKG_NAME baseline=$BASELINE_REF build_host=$BUILD_HOST"
+note "PKGBUILD: $pkgbuild"
+note "manifest.lock: $lock"
+
+# Refuse if PKGBUILD-side patches drifted from kernel-agent patches/.
+# manifest.lock.resolved_patches[].sha256 must match PKGBUILD-dir-side
+# files of the same basename. (If a patch is in resolved but missing from
+# PKGBUILD dir, fail loud — operator needs to sync.)
+note "verifying patch consistency between kernel-agent and marfrit-packages..."
+drift=0
+while IFS=$'\t' read -r basename expected_sha; do
+    pkg_side="${pkg_dir}/${basename}"
+    if [ ! -f "$pkg_side" ]; then
+        echo "  MISSING in PKGBUILD dir: $basename" >&2
+        drift=1; continue
+    fi
+    actual_sha=$(sha256sum "$pkg_side" | cut -d' ' -f1)
+    if [ "$actual_sha" != "$expected_sha" ]; then
+        echo "  DRIFT: $basename (expected $expected_sha, got $actual_sha)" >&2
+        drift=1
+    fi
+done < <(python3 -c "
+import yaml, sys, os
+lk = yaml.safe_load(open('$lock'))
+for r in lk['resolved_patches']:
+    bn = os.path.basename(r['include'])
+    print(f\"{bn}\t{r['sha256']}\")
+")
+[ "$drift" -eq 0 ] || die "patches differ between kernel-agent and marfrit-packages — sync first" 3
+note "patches OK ($(python3 -c "import yaml; print(len(yaml.safe_load(open('$lock'))['resolved_patches']))") files)"
+
+if [ "$DRY_RUN" -eq 1 ]; then
+    note "--dry-run: stopping before makepkg"
+    exit 0
+fi
+
+# Stage build dir on the build host via ssh
+note "staging build on ${BUILD_HOST}..."
+remote_stage="/tmp/ka-build-${HOST}-$$"
+ssh "${BUILD_HOST}" "mkdir -p '$remote_stage'"
+rsync -a "${pkg_dir}/" "${BUILD_HOST}:${remote_stage}/"
+
+# Run makepkg natively
+note "running makepkg --syncdeps --noconfirm --cleanbuild on ${BUILD_HOST}..."
+ssh "${BUILD_HOST}" "cd '$remote_stage' && makepkg --syncdeps --noconfirm --cleanbuild --skipchecksums" \
+    || die "makepkg failed on ${BUILD_HOST}" 4
+
+# Fetch built packages
+note "fetching .pkg.tar.zst from ${BUILD_HOST}..."
+local_out="${promote_out}/pkgs"
+mkdir -p "$local_out"
+rsync -av "${BUILD_HOST}:${remote_stage}/*.pkg.tar.zst" "$local_out/" 2>&1 | tail -5
+
+# Compute b2sums
+pkg_b2sum_list=$(cd "$local_out" && for p in *.pkg.tar.zst; do
+    [ -f "$p" ] || continue
+    printf '%s  %s\n' "$(b2sum "$p" | cut -d' ' -f1)" "$p"
+done)
+note "built packages:"
+echo "$pkg_b2sum_list" | sed 's/^/  /'
+
+# Publish via hertz marfrit-publish-arch (unless --skip-publish)
+if [ "$SKIP_PUBLISH" -eq 0 ]; then
+    note "publishing to packages.reauktion.de/arch/aarch64/..."
+    for p in "$local_out"/*.pkg.tar.zst; do
+        [ -f "$p" ] || continue
+        base="$(basename "$p")"
+        scp -q "$p" "hertz:/tmp/${base}" || die "scp to hertz failed: $base" 4
+        ssh hertz "sudo /opt/herding/bin/marfrit-publish-arch aarch64 '/tmp/${base}'" \
+            || die "marfrit-publish-arch failed: $base" 4
+        ssh hertz "rm -f '/tmp/${base}'"
+        note "published: $base"
+    done
+fi
+
+# Update manifest.lock with build receipt (append; don't rewrite the
+# existing fields)
+note "writing build receipt to manifest.lock..."
+python3 - <<PY
+import yaml, os, hashlib
+from datetime import datetime, timezone
+
+lock_path = "$lock"
+out_dir = "$local_out"
+build_host = "$BUILD_HOST"
+skipped = $SKIP_PUBLISH
+
+lk = yaml.safe_load(open(lock_path))
+epoch = os.environ.get("SOURCE_DATE_EPOCH")
+if epoch:
+    built_at = datetime.fromtimestamp(int(epoch), tz=timezone.utc).isoformat()
+else:
+    built_at = datetime.now(tz=timezone.utc).isoformat()
+
+pkgs = []
+for fn in sorted(os.listdir(out_dir)):
+    if not fn.endswith(".pkg.tar.zst"): continue
+    fp = os.path.join(out_dir, fn)
+    b2 = hashlib.blake2b(open(fp, "rb").read()).hexdigest()
+    pkgs.append({"name": fn, "size": os.path.getsize(fp), "b2sum": b2})
+
+lk["build"] = {
+    "built_at": built_at,
+    "built_on_host": build_host,
+    "ka_build_version": $VERSION,
+    "published": (not skipped),
+    "packages": pkgs,
+}
+yaml.dump(lk, open(lock_path, "w"), sort_keys=True, default_flow_style=False)
+print(f"  receipt: {len(pkgs)} package(s), built_at={built_at}, published={not skipped}")
+PY
+
+note "done."

bin/ka-promote

@@ -27,6 +27,7 @@ import argparse
 import glob
 import hashlib
 import os
+import re
 import subprocess
 import sys
 from datetime import datetime, timezone
@@ -37,6 +38,17 @@ VERSION = 1
 SCHEMA_VERSION = 1
 COVER_LETTER = "0000-cover-letter.patch"
 
+# git format-patch trailer: "-- \n<MAJOR>.<MINOR>(.<PATCH>)?\n" at EOF,
+# possibly with trailing blank line(s). Strip from each source patch so
+# that the cumulative is always well-formed regardless of include order.
+# See issue #31.
+_TRAILER_RE = re.compile(rb'\n-- \n\d+\.\d+(?:\.\d+)?\n+\Z')
+
+# Canonical separator emitted between concatenated patches in the
+# cumulative. Trailing blank line keeps patch(1) happy when the next
+# patch starts with "From <sha>".
+_CANONICAL_TRAILER = b'-- \n2.54.0\n\n'
+
 
 def die(msg, code=1):
     print(f"ka-promote: error: {msg}", file=sys.stderr)
@@ -124,11 +136,36 @@ def resolve_includes(includes, patches_root):
     return resolved
 
 
+def strip_trailer(data):
+    """Strip any trailing git format-patch sentinel from a patch.
+
+    Accepts patches in either canonical shape:
+      - WITH trailer: "...\n-- \n2.54.0\n\n"
+      - WITHOUT trailer: "...\n" (already stripped)
+
+    Returns data ending in a single newline so the caller can either
+    append a canonical trailer (mid-cumulative) or leave it bare (last).
+    """
+    stripped = _TRAILER_RE.sub(b'\n', data)
+    if not stripped.endswith(b'\n'):
+        stripped += b'\n'
+    return stripped
+
+
 def write_cumulative(resolved, out_path):
     with open(out_path, "wb") as out:
-        for r in resolved:
+        n = len(resolved)
+        for i, r in enumerate(resolved):
             with open(r["src"], "rb") as src:
-                out.write(src.read())
+                data = src.read()
+            data = strip_trailer(data)
+            out.write(data)
+            # Mid-cumulative patches need a separator so patch(1) knows
+            # where they end and the next "From <sha>" begins. Last
+            # patch stays bare — a trailing orphan sentinel reads as
+            # the start of a malformed new patch at EOF (issue #31).
+            if i != n - 1:
+                out.write(_CANONICAL_TRAILER)
     with open(out_path, "rb") as f:
         b2 = hashlib.blake2b(f.read()).hexdigest()
     size = os.path.getsize(out_path)

fleet/ohm.yaml

@@ -1,6 +1,6 @@
 # kernel-agent manifest for ohm (PineTab2 / Rockchip RK3566 + BES2600 SDIO WiFi/BT)
 #
-# Status: scaffolding from 2026-05-16. Patches/scopes are mirrored;
+# Status: scaffolding from 2026-05-16; per-series patchset converged 2026-05-21 (pkgrel=6). Patches/scopes are mirrored;
 # the build pipeline (cumulative-patch generation, makepkg invocation,
 # sign+publish) still relies on the hand-managed flow in
 # boltzmann:~/src/besser/marfrit-besser/danctnix-besser-pkgbuild/kernel/.
@@ -32,6 +32,13 @@ baseline:
 # mixed-prefix headers (a/drivers/staging/bes2600/...  b/bes2600/...).
 # They do NOT apply cleanly against the linux-pinetab2 baseline.
 #
+
+# 2026-05-21 update: per-series reconstruction (besser#22) completed
+# 2026-05-21; pkgrel=6 (srcversion 0E16463F) on ohm soak-passed with
+# the bounce-buffer + join-confirm-reset additions. The per-series
+# manifest below is the authoritative set; cumulative-c5x-danctnix
+# remains as historical fallback only.
+#
 # Until the per-series mirrors are reconstructed (kernel-agent followup
 # issue), the bes2600 driver scope is satisfied by a single-file
 # cumulative captured from the working hand-managed
@@ -39,19 +46,22 @@ baseline:
 # patches/driver/bes2600/cumulative-c5x-danctnix/README.md). This is
 # the c5x stack as it shipped in pkgrel=3 on 2026-05-18.
 includes:
-  # bes2600 driver (c5x stack as shipped in pkgrel=3) — single-file
+  # bes2600 driver pkgrel=6 cumulative: 22 commits squashed, equivalent
-  # interim cumulative; per-series reconstruction tracked separately.
+  # to marfrit/bes2600-dkms bes2600/join-confirm-failure-reset (top
-  - driver/bes2600/cumulative-c5x-danctnix/
+  # commit 3d833f8) overlaid on v7.0-danctnix1 staging tree. Produces
+  # srcversion 0E16463FA8D85F4704DE93F — bit-identical to the kernel
+  # running on ohm as of 2026-05-21.
+  #
+  # Includes c5.x stack, Patches A/B/F1-3/C/G/D/E/C2/H, besser#18
+  # (pending_record_lock SOFTIRQ-safe), bus_reset EXPORT_SYMBOL_GPL
+  # (danctnix btuart bridge), tx-sdio-dma-oob (KFENCE bounce-buffer),
+  # and besser#25 (wsm_join_confirm reset).
+  #
+  # Replaces the pkgrel=3 era cumulative-c5x-danctnix/, which is kept
+  # on disk for historical reference but no longer applied.
+  - driver/bes2600/cumulative-pkgrel6-danctnix/
   # close besser#1 — refuse multi-channel 5 GHz scans at driver boundary.
   - driver/bes2600/scan-filter-5ghz-danctnix/
-  # GCC 15.2.1 build-fix for arm_neon.h + SHADOW_CALL_STACK interaction.
-  # Runtime no-op as long as the config has CONFIG_SHADOW_CALL_STACK=n
-  # (current ohm setting). Kept in the manifest for the day SCS gets
-  # re-enabled. See reference_arm64_scs_arm_neon_gcc15 memory.
-  - arch/arm64/scs-arm-neon-build-fix/
-  # close besser#18 — pending_record_lock SOFTIRQ-safe -> -unsafe inversion.
-  # Mirror of marfrit/bes2600-dkms#11 (d95453c). 5-site spin_lock -> _bh.
-  - driver/bes2600/queue-pending-record-lock-bh-danctnix/
 
 # Explicitly NOT included (decision logged):
 #   - debian-copyright-fsf-address: Debian packaging metadata, not kernel

patches/driver/bes2600/cumulative-pkgrel6-danctnix/README.md

@@ -0,0 +1,48 @@
+# bes2600/cumulative-pkgrel6-danctnix
+
+Single-file cumulative diff representing the bes2600 driver source state
+that produces srcversion `0E16463FA8D85F4704DE93F` (pkgrel=6 on ohm,
+soak-verified 2026-05-21).
+
+## Equivalent commit chain
+
+Squash of 22 commits from `marfrit/bes2600-dkms` branch
+`bes2600/join-confirm-failure-reset` (top commit `3d833f8`):
+
+| # | Commit | Patch |
+|---|---|---|
+| 1-7  | 4fec8b2..3942404 | c5.x scan-defer / firmware-recovery stack |
+| 8-13 | 91640bd..73191b7 | Patch A, B, F1-3, C v3 |
+| 14   | a02f8b7 | Patch G (SPDX restore) |
+| 15-16| 93f2aab, dd01be0 | Patch D, E |
+| 17   | 447240c | Patch C2 |
+| 18   | dc13f5d | Patch H (bh.c hygiene) |
+| 19   | f469448 | besser#18 pending_record_lock SOFTIRQ-safe |
+| 20   | 0792ba4 | bus_reset EXPORT_SYMBOL_GPL (danctnix bridge) |
+| 21   | 49d9b77 | bounce SDIO TX buffers (DMA OOB / KFENCE fix) |
+| 22   | 3d833f8 | wsm_join_confirm reset (besser#25) |
+
+## Why a cumulative
+
+These 22 commits are the converged per-series; while they exist as
+individual scope dirs in `marfrit/bes2600-dkms`, several have
+context-overlap rebase conflicts that make per-scope inclusion in
+kernel-agent fragile (cf. ka#29 / besser#22 reconstruction debacle).
+
+Shipping the cumulative as one file in kernel-agent guarantees the
+applied source state on `v7.0-danctnix1` is bit-identical to the
+pkgrel=6 build on ohm, without dragging the besser-repo branch state
+into kernel-agent's resolution path.
+
+## Apply order
+
+This patch is the **base** for the bes2600 driver scope. The remaining
+non-bes2600 patch (`scan-filter-5ghz-danctnix` for besser#1) layers on
+top via the apply order in `fleet/ohm.yaml`.
+
+## Provenance
+
+Generated by `git diff e0d752a..bes2600/join-confirm-failure-reset --
+bes2600/` against `marfrit/bes2600-dkms`, then path-rewritten
+`bes2600/` → `drivers/staging/bes2600/`. The baseline `e0d752a`
+corresponds to the v7.0-danctnix1 bes2600 staging tree.

patches/driver/bes2600/join-confirm-reset-danctnix/0001-bes2600-reset-firmware-state-on-wsm_join_confirm-fai.patch

@@ -0,0 +1,131 @@
+From 3d833f8ccf31895a2ce7bf4fd4ef839e653b29bb Mon Sep 17 00:00:00 2001
+From: Markus Fritsche <fritsche.markus@gmail.com>
+Date: Thu, 21 May 2026 09:25:12 +0200
+Subject: [PATCH 22/22] bes2600: reset firmware state on wsm_join_confirm
+ failure
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+When wsm_join_confirm() returns status != WSM_STATUS_SUCCESS (ret 1),
+the driver cleared its bookkeeping but did not reset the firmware
+interface, leaving it in an intermediate post-rejection state.  A rapid
+second JOIN attempt (e.g. wpa_supplicant retrying after the
+PREV_AUTH_NOT_VALID deauth that mac80211 emits to clean up) hits an
+inconsistent firmware context, causing bes2600_sdio_read_rx_batch to
+return SDIO error which cascades into wifi_force_close:
+
+  wsm_join_confirm ret 1
+  deauthenticating from <bssid> by local choice (Reason: 2=PREV_AUTH_NOT_VALID)
+  [~10 min later]
+  bes2600_sdio_read_rx_batch sdio read error
+  WARNING: at bes2600_tx_loop_set_enable / bes2600_chrdev_wifi_force_close
+
+Two additions to the failure path in bes2600_join_work():
+
+1. wsm_reset (WSM_REQ_ID_RESET, 0x000A) with reset_statistics=false.
+   This returns the firmware to IDLE so the next association attempt
+   starts from a known-clean state.  bes2600_unjoin_work() performs the
+   same reset, but gates it on join_status != PASSIVE; after a failed
+   JOIN join_status stays PASSIVE, so that path never fires — call
+   wsm_reset directly here instead.
+
+   Contract: wsm_reset takes only wsm_cmd_lock (not conf_lock, not
+   wsm_oper_lock).  wsm_oper_unlock was already called inside
+   wsm_join_confirm() before wsm_join() returned -EINVAL, so there is
+   no re-entrancy hazard.  conf_lock is held at this call site, which is
+   compatible with wsm_reset's locking requirements.
+
+2. queue_work(workqueue, &priv->unjoin_work) instead of direct
+   wsm_unlock_tx().  Serialises the next association attempt through
+   the workqueue so it cannot race against lingering firmware-side
+   effects of the failure.  If unjoin_work is already queued, release
+   TX immediately (matching cw1200 ancestor sta.c:1344 comment "Tx lock
+   still held, unjoin will clear it.").
+
+Ancestor reference: drivers/net/wireless/st/cw1200/sta.c, function
+cw1200_join_work(), lines 1339-1344.  cw1200 queues unjoin_work on join
+failure for the same reason.  bes2600 needs the direct wsm_reset in
+addition because its unjoin_work has the join_status gate that cw1200's
+cw1200_do_unjoin() does not.
+
+Signed-off-by: Claude (noether) <claude@reauktion.de>
+---
+ bes2600/sta.c | 47 +++++++++++++++++++++++++++++++++++++++++++----
+ 1 file changed, 43 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/staging/bes2600/sta.c b/drivers/staging/bes2600/sta.c
+index 476d875..bf86835 100644
+--- a/drivers/staging/bes2600/sta.c
++++ b/drivers/staging/bes2600/sta.c
+@@ -2225,9 +2225,10 @@ void bes2600_join_work(struct work_struct *work)
+ 	struct wsm_template_frame probe_tmp = {
+ 		.frame_type = WSM_FRAME_TYPE_PROBE_REQUEST,
+ 	};
+-	/*struct wsm_reset reset = {
+-		.reset_statistics = true,
+-	};*/
++	struct wsm_reset join_fail_reset = {
++		.reset_statistics = false,
++	};
++	bool join_failed = false;
+ 
+ 
+ 	BUG_ON(queueId >= 4);
+@@ -2410,6 +2411,33 @@ void bes2600_join_work(struct work_struct *work)
+ #endif /*CONFIG_BES2600_TESTMODE*/
+ 			cancel_delayed_work_sync(&priv->join_timeout);
+ 			bes2600_pwr_clear_busy_event(priv->hw_priv, BES_PWR_LOCK_ON_JOIN);
++			/*
++			 * Firmware rejected WSM_JOIN (wsm_join_confirm ret 1).
++			 * Issue wsm_reset so the firmware returns to a clean
++			 * IDLE state before the next association attempt.
++			 *
++			 * Without this reset the firmware sits in an
++			 * intermediate post-reject state.  A rapid second
++			 * JOIN (e.g. wpa_supplicant retrying after the
++			 * PREV_AUTH_NOT_VALID deauth that follows) hits an
++			 * inconsistent firmware context, causing
++			 * bes2600_sdio_read_rx_batch to return SDIO error
++			 * which cascades into wifi_force_close.
++			 *
++			 * cw1200 ancestor (drivers/net/wireless/st/cw1200/
++			 * sta.c:1339) queues unjoin_work on join failure for
++			 * the same reason; bes2600_unjoin_work gates its
++			 * wsm_reset on join_status != PASSIVE, so after a
++			 * failed JOIN (join_status stays PASSIVE) that path
++			 * never fires — call wsm_reset directly here instead.
++			 *
++			 * Contract: wsm_reset takes only wsm_cmd_lock; safe
++			 * to call while conf_lock is held.  wsm_oper_unlock
++			 * was already called in wsm_join_confirm() before
++			 * wsm_join() returned the error.
++			 */
++			WARN_ON(wsm_reset(hw_priv, &join_fail_reset, priv->if_id));
++			join_failed = true;
+ 		} else {
+ 			/* Upload keys */
+ #ifdef CONFIG_BES2600_TESTMODE
+@@ -2434,7 +2462,18 @@ void bes2600_join_work(struct work_struct *work)
+ 	up(&hw_priv->conf_lock);
+ 	if (bss)
+ 		cfg80211_put_bss(hw_priv->hw->wiphy, bss);
+-	wsm_unlock_tx(hw_priv);
++	/*
++	 * On join failure: queue unjoin_work so the next association
++	 * attempt is serialised after any lingering cleanup, matching
++	 * cw1200 sta.c:1344 "Tx lock still held, unjoin will clear it."
++	 * If unjoin_work is already queued, release TX immediately.
++	 */
++	if (join_failed) {
++		if (queue_work(hw_priv->workqueue, &priv->unjoin_work) <= 0)
++			wsm_unlock_tx(hw_priv);
++	} else {
++		wsm_unlock_tx(hw_priv);
++	}
+ }
+ 
+ void bes2600_join_timeout(struct work_struct *work)
+-- 
+2.54.0
+

patches/driver/bes2600/join-confirm-reset-danctnix/README.md

@@ -0,0 +1,46 @@
+# bes2600/join-confirm-reset-danctnix
+
+Danctnix-flavor patch closing besser#25 (wsm_join_confirm failure cascade).
+
+## What it does
+
+When firmware returns status 1 on a JOIN command (`wsm_join_confirm ret 1`),
+add a direct `wsm_reset(...)` call so the firmware returns to a clean IDLE
+state, plus `queue_work(workqueue, &priv->unjoin_work)` for serialisation of
+the next association attempt.
+
+## Why it's a fork-divergence fix
+
+`cw1200_join_work()` (cw1200 ancestor, `drivers/net/wireless/st/cw1200/sta.c:1339-1344`)
+queues `unjoin_work` on join failure: `cw1200_do_unjoin()` calls `wsm_reset`
+when `join_status == STA`.
+
+bes2600's `bes2600_unjoin_work()` gates the same `wsm_reset` on
+`join_status != PASSIVE`. After a failed JOIN, `join_status` stays PASSIVE
+(only set to STA on success) — queuing `unjoin_work` alone is insufficient
+on bes2600. The danctnix variant carries a direct `wsm_reset` in the
+failure path *and* the queue_work serialisation.
+
+## Observable effects (pkgrel=6 soak)
+
+Beyond closing the cascade (besser#25 acceptance), this patch also
+collapsed the periodic ~600 ms latency jitter on ohm:
+
+| | pkgrel=5 | pkgrel=6 |
+|---|---|---|
+| max RTT | 612 ms | 13.9 ms |
+| mdev | 103.5 ms | 1.55 ms |
+
+The bgscan-driven roam-attempt to a 5 GHz BSSID followed by `wsm_join`
+reject was briefly stalling TX every minute even when the cascade did
+not fire.
+
+## Upstream
+
+- besser issue: marfrit/besser#25
+- bes2600-dkms branch (Mobian flavor): bes2600/wsm-join-confirm-reset
+  (PR #12 against `cleanups`)
+- bes2600-dkms branch (danctnix flavor): bes2600/join-confirm-failure-reset
+  (top commit `3d833f8`)
+- shipped as patch 0022 in danctnix-besser-pkgbuild kernel/ (pkgrel=6,
+  srcversion 0E16463FA8D85F4704DE93F)

tests/ka-build/run-tests.sh

@@ -0,0 +1,113 @@
+#!/usr/bin/env bash
+# ka-build test suite — dry-run paths only.
+#
+# Phase-1 deliverable per issue #34. The full makepkg path is exercised
+# manually on boltzmann (parity test against the most recent hand-built
+# linux-fresnel-fourier pkg); not in this suite because:
+#   - Needs real ssh to boltzmann + ~30 min build wall time
+#   - Hermetic sandbox would need a mock marfrit-publish-arch on hertz
+# Future-work: add a `--mock-build-host` flag + fixture builder so this
+# can run in CI.
+#
+# What this suite covers:
+#   - Argument parsing + required-host check
+#   - manifest.yaml read + package.name / build_host.primary extraction
+#   - Refuses if manifest.lock missing (ka-promote not run)
+#   - Refuses if PKGBUILD missing
+#   - Refuses on patch drift between kernel-agent and marfrit-packages
+#   - Happy-path dry-run on fresnel (all 6 patches match)
+
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+packages_repo="${PACKAGES_REPO_FOR_TESTS:-${HOME}/src/marfrit-packages}"
+
+pass=0
+fail=0
+results=()
+note() { printf '  %s\n' "$*"; }
+ok()   { results+=("PASS  $1"); pass=$((pass+1)); note "PASS"; }
+ko()   { results+=("FAIL  $1: $2"); fail=$((fail+1)); note "FAIL: $2"; }
+
+# Reset build/ before running so we exercise the "no manifest.lock yet" path
+rm -rf "$repo_root/build/fresnel"
+
+echo
+echo "Running ka-build test suite from $repo_root"
+echo
+
+# ----- 1. requires host arg -----
+echo "::: requires host arg"
+set +e
+out=$("$repo_root/bin/ka-build" 2>&1)
+rc=$?
+set -e
+if [ "$rc" -eq 2 ] && echo "$out" | grep -q "host is required"; then ok "requires host arg"; else ko "requires host arg" "exit=$rc out=$out"; fi
+
+# ----- 2. unknown flag -----
+echo "::: unknown flag rejected"
+set +e
+out=$("$repo_root/bin/ka-build" fresnel --nonsense 2>&1)
+rc=$?
+set -e
+if [ "$rc" -ne 0 ] && echo "$out" | grep -q "unknown flag"; then ok "unknown flag rejected"; else ko "unknown flag rejected" "exit=$rc out=$out"; fi
+
+# ----- 3. refuses if manifest.lock missing -----
+echo "::: refuses if manifest.lock missing (ka-promote not run)"
+set +e
+out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo "$packages_repo" 2>&1)
+rc=$?
+set -e
+if [ "$rc" -eq 2 ] && echo "$out" | grep -q "no manifest.lock"; then ok "refuses no-lock"; else ko "refuses no-lock" "exit=$rc out=$out"; fi
+
+# Now run ka-promote so the rest can proceed
+"$repo_root/bin/ka-promote" fresnel >/dev/null
+
+# ----- 4. refuses if PKGBUILD missing -----
+echo "::: refuses if PKGBUILD missing (--packages-repo wrong)"
+set +e
+out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo /tmp/non-existent-mp 2>&1)
+rc=$?
+set -e
+if [ "$rc" -eq 2 ]; then ok "refuses bad packages-repo"; else ko "refuses bad packages-repo" "exit=$rc out=$out"; fi
+
+# ----- 5. happy-path dry-run -----
+echo "::: happy-path dry-run (fresnel, real packages-repo)"
+if [ ! -f "$packages_repo/arch/linux-fresnel-fourier/PKGBUILD" ]; then
+    note "SKIP: $packages_repo/arch/linux-fresnel-fourier/PKGBUILD not present"
+    results+=("SKIP  happy-path dry-run (PKGBUILD missing locally)")
+else
+    set +e
+    out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo "$packages_repo" 2>&1)
+    rc=$?
+    set -e
+    if [ "$rc" -eq 0 ] && echo "$out" | grep -q "patches OK (6 files)"; then ok "happy-path dry-run"; else ko "happy-path dry-run" "exit=$rc out=$out"; fi
+fi
+
+# ----- 6. patch drift detection -----
+echo "::: patch drift detection (mutate a copied patch, expect exit 3)"
+if [ ! -d "$packages_repo/arch/linux-fresnel-fourier" ]; then
+    note "SKIP: $packages_repo/arch/linux-fresnel-fourier not present"
+    results+=("SKIP  patch drift detection")
+else
+    sandbox=$(mktemp -d -t ka-build-drift.XXXXXX)
+    cp -r "$packages_repo/arch/linux-fresnel-fourier" "$sandbox/linux-fresnel-fourier"
+    mkdir -p "$sandbox/arch"
+    mv "$sandbox/linux-fresnel-fourier" "$sandbox/arch/linux-fresnel-fourier"
+    # Mutate one patch so its sha256 differs from manifest.lock's recorded sha
+    echo "drift" >> "$sandbox/arch/linux-fresnel-fourier/0001-arm64-dts-rk3399-pinebook-pro-add-OC-OPP-tables-1704-2184.patch"
+    set +e
+    out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo "$sandbox" 2>&1)
+    rc=$?
+    set -e
+    rm -rf "$sandbox"
+    if [ "$rc" -eq 3 ] && echo "$out" | grep -q "DRIFT:"; then ok "patch drift detection"; else ko "patch drift detection" "exit=$rc out=$out"; fi
+fi
+
+echo
+echo "===================="
+printf '%s\n' "${results[@]}"
+echo "===================="
+echo "passed: $pass"
+echo "failed: $fail"
+[ "$fail" -eq 0 ] || exit 1

tests/ka-promote/run-tests.sh

@@ -12,8 +12,10 @@ set -euo pipefail
 repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
 fixtures="${repo_root}/tests/ka-promote/fixtures"
 
-# Phase-3 ground truth — recorded 2026-05-18, fresnel cumulative b2sum.
+# Phase-3 ground truth — re-recorded 2026-05-19 after issue #31 fix
-FRESNEL_EXPECTED_B2SUM=4d9d93c655ea701b587bf1383c794f41b1aeb3bc32bca69ce3488852ec2c1474a2f47585608598b39ac05671490b8df63c5bc7d093f87e1afd5a92f908891b67
+# (write_cumulative now strips per-input trailers + emits canonical
+# separators between, but not after, concatenated patches).
+FRESNEL_EXPECTED_B2SUM=9c21751cc48ab57cdf48058cc4309752de169c567bbb898c342ff3e4a5cc79add53e3fd4217c2ae2ae7c16b0f19518cf1791907367e1ea9ef16458e1e90c05e0
 
 pass=0
 fail=0
@@ -110,6 +112,47 @@ echo
 echo "Running ka-promote test suite from $repo_root"
 echo
 
+# ----- unit: strip_trailer + write_cumulative shape (issue #31) -----
+echo "::: strip_trailer + cumulative shape (issue #31)"
+python3 - "$repo_root" <<'PY'
+import importlib.util, pathlib, sys, tempfile, os
+root = pathlib.Path(sys.argv[1])
+from importlib.machinery import SourceFileLoader
+mod = SourceFileLoader("ka_promote", str(root/"bin"/"ka-promote")).load_module()
+
+# strip_trailer accepts both shapes and yields newline-terminated body
+assert mod.strip_trailer(b"...body...\n-- \n2.54.0\n\n") == b"...body...\n"
+assert mod.strip_trailer(b"...body...\n-- \n2.53.0\n\n") == b"...body...\n"
+assert mod.strip_trailer(b"...body...\n-- \n2.20\n\n")   == b"...body...\n"
+assert mod.strip_trailer(b"...body...\n")                  == b"...body...\n"
+assert mod.strip_trailer(b"...body...")                    == b"...body...\n"
+# Multiple trailing blanks after the version still strip
+assert mod.strip_trailer(b"x\n-- \n2.54.0\n\n\n") == b"x\n"
+
+# write_cumulative: 3 inputs (mix of with-/without-trailer), check ordering
+with tempfile.TemporaryDirectory() as d:
+    p1 = os.path.join(d, "a.patch"); open(p1,"wb").write(b"PA\n-- \n2.54.0\n\n")
+    p2 = os.path.join(d, "b.patch"); open(p2,"wb").write(b"PB\n")  # already bare
+    p3 = os.path.join(d, "c.patch"); open(p3,"wb").write(b"PC\n-- \n2.40.1\n\n")
+    out = os.path.join(d, "out.patch")
+    resolved = [{"src": p1}, {"src": p2}, {"src": p3}]
+    mod.write_cumulative(resolved, out)
+    body = open(out,"rb").read()
+    assert body == b"PA\n-- \n2.54.0\n\nPB\n-- \n2.54.0\n\nPC\n", repr(body)
+    # Last patch (PC) must NOT carry an orphan trailer at EOF
+    assert not body.rstrip(b"\n").endswith(b"2.40.1"), \
+        f"last patch's trailer leaked into cumulative: {body[-40:]!r}"
+print("PASS")
+PY
+if [ $? -eq 0 ]; then
+    results+=("PASS  strip_trailer + cumulative shape (issue #31)")
+    pass=$((pass+1))
+else
+    results+=("FAIL  strip_trailer + cumulative shape (issue #31)")
+    fail=$((fail+1))
+fi
+echo
+
 # Use the real fleet/fresnel.yaml — copy into a sandbox so the test is hermetic.
 mkdir -p /tmp/ka-promote-parity-fixture
 cp "$repo_root/fleet/fresnel.yaml" /tmp/ka-promote-parity-fixture/fresnel.yaml