CB-592: shadow the admin GITEA_ACCESS_TOKEN in every member's herdr overlay

herdr spawns a pane from its own login-shell process env and layers our map on
top, so any key baseEnv never mentions passes straight through — including the
admin forge token. baseEnv now puts a non-blank sentinel for
GITEA_ACCESS_TOKEN, applied after the profile's own env: so no profile can
restore it. One place, every adapter, every profile including future ones.
CB-302's GITEA_TOKEN grant (applyGitToken) is untouched.

bridged/src/test/java/dev/ltms/bridged/member/ClaudeCodeLauncherTest.java

@@ -676,6 +676,46 @@ class ClaudeCodeLauncherTest {
                 "the guard-checked baseUrl must win over any env: entry, or the boundary is bypassable");
     }
 
+    // --- CB-592: the admin GITEA_ACCESS_TOKEN never reaches a member -----------------------------
+
+    /**
+     * herdr's env map is an overlay onto its own (login-shell) process environment, so a worker
+     * inherits whatever the daemon's shell carries — including the admin GITEA_ACCESS_TOKEN — for
+     * every key baseEnv does not explicitly shadow. This pins that the launcher DOES send an
+     * explicit (non-blank) GITEA_ACCESS_TOKEN to herdr on every spawn, whatever the profile is, so
+     * a future baseEnv refactor cannot silently drop it and reopen the leak. Asserted against what
+     * tab.create's params actually carry, not an internal map built in the test (gitea #77).
+     */
+    @Test
+    void everySpawnShadowsTheAdminGiteaAccessToken() {
+        FakeHerdr herdr = new FakeHerdr();
+        service(herdr, List.of("claude"), null).spawn();
+
+        String shadowed = startEnv(herdr).get("GITEA_ACCESS_TOKEN");
+        assertNotNull(shadowed, "GITEA_ACCESS_TOKEN must be explicitly overlaid, not left unmentioned");
+        assertFalse(shadowed.isBlank(), "a blank overlay value's override behaviour is unverified — must be non-blank");
+    }
+
+    /**
+     * No profile — present or future — may restore the admin token by naming it in {@code env:}.
+     * The shadow is applied after the profile's own env in {@link HerdrPeerLauncher#baseEnv}
+     * precisely so this can never happen; this test pins that ordering.
+     */
+    @Test
+    void aProfileEnvEntryCannotRestoreTheAdminGiteaAccessToken() {
+        FakeHerdr herdr = new FakeHerdr();
+        BridgedConfig.Profile cfg = new BridgedConfig.Profile(
+                "ltms-local", "http://gx00.gw:8000", "coder", null, "BRIDGED_WORKER_TOKEN",
+                List.of("claude"), "tab", "bridged-workers", "w #{n}", null, null, null, null, null,
+                null, Map.of("GITEA_ACCESS_TOKEN", "admin-secret-from-profile-config"), null, null);
+        new ClaudeCodeLauncher(new AgentControl(herdr), new WorkspaceControl(herdr),
+                new SubscriptionGuard(Set.of("gx00.gw")), Map.of(cfg.profile(), cfg), cfg.profile(),
+                _ -> null).spawn();
+
+        assertNotEquals("admin-secret-from-profile-config", startEnv(herdr).get("GITEA_ACCESS_TOKEN"),
+                "a profile's own env: must not be able to smuggle the admin token back in");
+    }
+
     // ── CB-533: the model is pinned on the command line, not only in the environment ────────────
 
     /** A launcher for a profile identical but for its {@code model:} — the only variable here. */

bridged/src/test/java/dev/ltms/bridged/member/OpenCodeLauncherTest.java

@@ -208,6 +208,21 @@ class OpenCodeLauncherTest {
                 "a git-token profile gets the peer-neutral GITEA_TOKEN grant, same as Claude");
     }
 
+    /**
+     * CB-592: the shadow lives in {@link HerdrPeerLauncher#baseEnv}, shared by every adapter — this
+     * pins that the opencode path gets it too, not just Claude's. See the matching test in
+     * {@code ClaudeCodeLauncherTest} for the full rationale (gitea #77).
+     */
+    @Test
+    void everySpawnShadowsTheAdminGiteaAccessToken(@TempDir Path root) {
+        FakeHerdr herdr = new FakeHerdr();
+        service(herdr, root, opencodeCfg(null, null, null)).spawn();
+
+        String shadowed = startEnv(herdr).get("GITEA_ACCESS_TOKEN");
+        assertNotNull(shadowed, "GITEA_ACCESS_TOKEN must be explicitly overlaid, not left unmentioned");
+        assertFalse(shadowed.isBlank(), "a blank overlay value's override behaviour is unverified — must be non-blank");
+    }
+
     @Test
     void capabilitiesDeclareOrphanReapAndMcpAskAndConditionalSelfPr(@TempDir Path root) {
         FakeHerdr herdr = new FakeHerdr();