ci: swap deprecated ep_readonly_guest for ep_guest in plugin matrix (#7808)

ep_readonly_guest is archived (read-only on GitHub) and its
authenticate hook unconditionally swaps req.session.user with a
read-only guest, even when the request carries an HTTP Authorization
header. That silently demoted admin login attempts and stalled the
anonymizeAuthorSocket tests for 14 min/run on every with-plugins CI
matrix (#7795). The pre-fix theory blamed ep_hash_auth.handleMessage;
the actual hook trace is a red herring — handleMessage only fires on
the /pad namespace and never on /settings.

ep_guest is the maintained successor (same authors, same purpose).
1.0.72 on npm already includes the "defer to basic auth / admin
paths" fix backported to ep_readonly_guest by intent here. Swapping
the matrix unblocks the anonymizeAuthorSocket suite on Linux,
Windows, and the upgrade-from-latest-release workflow.

The runtime probe added in #7796 stays — it still catches any other
authenticate-hook plugin that rejects the test's plain-text
credentials (e.g. a future ep_hash_auth-style hashed-only plugin).
Reattribute its comment so future readers don't chase ep_hash_auth.

Closes #7795.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.github/workflows/backend-tests.yml

@@ -146,7 +146,7 @@ jobs:
           ep_hash_auth
           ep_headings2
           ep_markdown
-          ep_readonly_guest
+          ep_guest
           ep_set_title_on_pad
           ep_spellcheck
           ep_subscript_and_superscript
@@ -289,7 +289,7 @@ jobs:
           ep_hash_auth
           ep_headings2
           ep_markdown
-          ep_readonly_guest
+          ep_guest
           ep_set_title_on_pad
           ep_spellcheck
           ep_subscript_and_superscript

.github/workflows/frontend-tests.yml

@@ -219,7 +219,7 @@ jobs:
           ep_hash_auth
           ep_headings2
           ep_markdown
-          ep_readonly_guest
+          ep_guest
           ep_set_title_on_pad
           ep_spellcheck
           ep_subscript_and_superscript
@@ -308,7 +308,7 @@ jobs:
           ep_hash_auth
           ep_headings2
           ep_markdown
-          ep_readonly_guest
+          ep_guest
           ep_set_title_on_pad
           ep_spellcheck
           ep_subscript_and_superscript

.github/workflows/load-test.yml

@@ -93,7 +93,7 @@ jobs:
           ep_hash_auth
           ep_headings2
           ep_markdown
-          ep_readonly_guest
+          ep_guest
           ep_set_title_on_pad
           ep_spellcheck
           ep_subscript_and_superscript

.github/workflows/upgrade-from-latest-release.yml

@@ -76,7 +76,7 @@ jobs:
           ep_hash_auth
           ep_headings2
           ep_markdown
-          ep_readonly_guest
+          ep_guest
           ep_set_title_on_pad
           ep_spellcheck
           ep_subscript_and_superscript

src/tests/backend/specs/admin/anonymizeAuthorSocket.ts

@@ -62,17 +62,21 @@ const ask = (socket: any, evt: string, payload: any, replyEvt: string) =>
     });
 
 // adminSocket() depends on Etherpad's default plain-text password check for
-// settings.users[name].password. Plugins like ep_hash_auth replace the
-// authenticate hook to expect hashed credentials, so the basic-auth probe
-// returns no admin session, /settings's connection handler returns without
+// settings.users[name].password. Any authenticate-hook plugin that claims
+// the request before the built-in basic-auth fallback can block this:
+// the historical offender was ep_readonly_guest, whose authenticate hook
+// sorts itself first and silently swaps req.session.user with a guest
+// (#7795); ep_hash_auth-style plugins that expect hashed credentials
+// would do the same. When that happens the basic-auth probe returns no
+// admin session, /settings's connection handler returns without
 // registering listeners (see src/node/hooks/express/adminsettings.ts:25),
 // and every socket.emit() afterwards waits forever for a reply that
 // nothing will ever send. The socket itself still connects when admin
 // session is missing, so the probe has to run at the application layer:
-// emit a known `/settings` event (`load`) and wait for the matching reply
-// (`settings`). If it doesn't arrive within the budget, skip — much
-// cheaper than letting mocha's 120s per-test timeout absorb 7 stalled
-// tests. Tracked in #7795.
+// emit a known `/settings` event (`authorLoad`) and wait for the matching
+// reply (`results:authorLoad`). If it doesn't arrive within the budget,
+// skip — much cheaper than letting mocha's 120s per-test timeout absorb
+// 7 stalled tests.
 const PROBE_BUDGET_MS = 15000;
 const adminSocketWithProbe = async (budgetMs: number): Promise<{
   ok: true; socket: any;
@@ -135,8 +139,9 @@ describe(__filename, function () {
     if (!probe.ok) {
       console.warn(
           `[anonymizeAuthorSocket] admin socket probe failed (${probe.reason}); ` +
-          'skipping suite — likely an authenticate-hook plugin (e.g. ep_hash_auth) ' +
-          'rejecting the test\'s plain-text admin credentials. Tracked in #7795.');
+          'skipping suite — an authenticate-hook plugin (e.g. ep_readonly_guest, ' +
+          'or an ep_hash_auth-style plugin requiring hashed credentials) is ' +
+          'rejecting the test\'s plain-text admin credentials.');
       this.skip();
       return;
     }