release: 2.4.2: audit stage 0, release hygiene

Stage 0 of docs/audit-2026-10-12.md, 7/7: the release image says which
release it is (H1), the e2e module is compiled on every push (M20),
test/ is out of the build context (L33), the documents say the 2.x image
is not published and show the local build (M6), dependencies raised,
staticcheck clean, the negative e2e cases held to their own refusals
(which showed the level-1 rate-limit case had never seen the limit).

CHANGELOG cut; pin 2.4.2 in deploy/docker-compose.yml, README (with the
local-build note), guide; development.md "from pin" and the planned cuts
of the audit's stages (2.5.0 ... 2.6.0); roadmap row in progress and the
recommended order; stage 0 marked shipped in the plan. No tag (the
owner's command only).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,12 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); version
 
 ## [Unreleased]
 
+## [2.4.2] - 2026-10-14
+
+Release hygiene: stage 0 of the 2026-10-12 audit. Nothing the panel or the
+mail path does changes; the release workflow, the tests, the dependencies and
+the documents do.
+
 ### Fixed
 
 - **A release image says which release it is.** The e2e gate in

README.md

@@ -112,8 +112,8 @@ outbound mail will not reach the real internet without DNS, PTR, and port 25.
 > local image and pulls nothing:
 >
 > ```sh
-> docker build -f build/Dockerfile --build-arg VERSION=2.4.1 \
->   -t ghcr.io/mixeme/selfpost:2.4.1 .
+> docker build -f build/Dockerfile --build-arg VERSION=2.4.2 \
+>   -t ghcr.io/mixeme/selfpost:2.4.2 .
 > ```
 
 ```sh
@@ -122,7 +122,7 @@ docker run --rm -d --name selfpost-try \
   -e SELFPOST_HOSTNAME=mail.local.test \
   -e PANEL_COOKIE_SECURE=false \
   -v selfpost-try-data:/data \
-  ghcr.io/mixeme/selfpost:2.4.1
+  ghcr.io/mixeme/selfpost:2.4.2
 ```
 
 **Get the setup URL** (pick one):

deploy/docker-compose.yml

@@ -23,7 +23,7 @@
 
 services:
   selfpost:
-    image: ghcr.io/mixeme/selfpost:2.4.1
+    image: ghcr.io/mixeme/selfpost:2.4.2
     restart: unless-stopped
     environment:
       SELFPOST_HOSTNAME: "${SELFPOST_HOSTNAME:?set the mail/panel hostname, e.g. mail.example.com}"

docs/audit-2026-10-12.md

@@ -543,7 +543,7 @@ card, and it is not planned) are mockup-first; a migration the test server
 has already run is never edited — the next file is added; the published
 `1.x` tags and images are history and are not touched.
 
-### Stage 0 — release hygiene (no product code) → `2.4.2`
+### Stage 0 — release hygiene (no product code) → `2.4.2` (shipped 2026-10-14)
 
 - [x] **Stamp the right version** (H1). Make the e2e build take the version from
    the environment (`VERSION: ${SELFPOST_E2E_VERSION:-e2e}` in

docs/development.md

@@ -107,7 +107,7 @@ than the default «meaningful step» rule in [§ Commits and release build](#com
 2. Git tag `vX.Y.Z` and publish the GitHub Release only on explicit request (see
    [§ Release image](#release-image)).
 
-**Planned version cuts** (from pin `2.4.1`; adjust if semver changes mid-track):
+**Planned version cuts** (from pin `2.4.2`; adjust if semver changes mid-track):
 
 | Stage | ID | Cut |
 |---|---|---|
@@ -130,6 +130,12 @@ than the default «meaningful step» rule in [§ Commits and release build](#com
 | 17 | panel-notifications | `2.3.0` |
 | 18 | from-header-binding | `2.4.0` |
 | 19 | code audit 2026-10-12 and its plan (docs only, owner-requested cut) | `2.4.1` (PATCH) |
+| 20 | audit-2026-10-12 stage 0: release hygiene | `2.4.2` (PATCH) |
+| 21 | audit-2026-10-12 stages 1 and 2 | `2.5.0` |
+| 22 | audit-2026-10-12 stage 2b: the log tailer | `2.5.1` |
+| 23 | audit-2026-10-12 stage 3 | `2.5.2` |
+| 24 | audit-2026-10-12 stage 4 | `2.5.3` |
+| 25 | audit-2026-10-12 stage 5 | `2.6.0` |
 
 Docs-only prep (checklists in plans, no product code) uses the same per-step
 commit rule but **no** version cut until the next product stage ships.

docs/guide.md

@@ -184,14 +184,14 @@ cat ./data/setup-token
 #### Fixed image tag
 
 `deploy/docker-compose.yml` pins an explicit version (`ghcr.io/mixeme/selfpost:X.Y.Z`),
-deliberately never `:latest`. The current pin is `2.4.1`. **No 2.x image is
+deliberately never `:latest`. The current pin is `2.4.2`. **No 2.x image is
 published on ghcr.io yet** (the newest there is `1.3.0`); until one is, build
 it from the checkout under the pinned name, and Compose uses the local image
 instead of pulling:
 
 ```sh
-docker build -f build/Dockerfile --build-arg VERSION=2.4.1 \
-  -t ghcr.io/mixeme/selfpost:2.4.1 .
+docker build -f build/Dockerfile --build-arg VERSION=2.4.2 \
+  -t ghcr.io/mixeme/selfpost:2.4.2 .
 ```
 
 `VERSION` must equal the tag: it is the version the backup check compares

docs/roadmap.md

@@ -42,14 +42,15 @@ in `git log` and [CHANGELOG.md](../CHANGELOG.md).
 | from-header-binding | Hold a message's `From:` header against the application that sends it | shipped `2.4.0` | 9/9 | [plans/from-header-binding.md](plans/from-header-binding.md) |
 | panel-redesign | Panel redesign (accepted mockups, design contract) | shipped `2.0.0` | 27/27 | [plans/panel-redesign.md](plans/panel-redesign.md) |
 | schema-squash | Squash SQLite migrations into a 2.x baseline | built in panel-redesign (stage 1) | — | [plans/panel-redesign.md](plans/panel-redesign.md) |
-| audit-2026-10-12 | Follow-ups of the 2026-10-12 full-tree code audit, seven stages | agreed (2026-10-12: stage 0 first, then 1+2; the rest after) | 7/61 | [audit-2026-10-12.md](audit-2026-10-12.md) |
+| audit-2026-10-12 | Follow-ups of the 2026-10-12 full-tree code audit, seven stages | in progress (stage 0 shipped `2.4.2`; next stages 1+2 → `2.5.0`) | 7/61 | [audit-2026-10-12.md](audit-2026-10-12.md) |
 
 **Recommended order** (not binding; owner, 2026-10-09: feature order follows
 development convenience): **panel-redesign** shipped as `2.0.0` (2026-10-11) and
 **inbound-antispam-panel** as `2.1.0` (2026-10-12), built in the new component
 kit — styling its two screens once instead of twice. **delivery-log-storage**
 shipped as `2.2.0` the same day, **panel-notifications** as `2.3.0` and
-**from-header-binding** as `2.4.0`.
+**from-header-binding** as `2.4.0`. Stage 0 of
+[audit-2026-10-12](audit-2026-10-12.md) shipped as `2.4.2` (2026-10-14).
 Nothing is agreed after it: every remaining
 item is a candidate. panel-docs shipped in
 [CHANGELOG.md](../CHANGELOG.md) `[1.8.0]`; dmarc-reports in `[1.7.0]`