diff --git a/tests/e2e/lib/model_slug.sh b/tests/e2e/lib/model_slug.sh
index aca6148bc..f685c2516 100755
--- a/tests/e2e/lib/model_slug.sh
+++ b/tests/e2e/lib/model_slug.sh
@@ -11,10 +11,10 @@
 #                                    default + 401, see PR #1714.)
 #
 #   claude-code → auth-aware:
-#                  E2E_MINIMAX_API_KEY    → "minimax:MiniMax-M2.7"
-#                                           (colon-namespaced BYOK id; bare
-#                                            "MiniMax-M2" 400s on a deploy-skewed
-#                                            staging registry — #2263)
+#                  E2E_MINIMAX_API_KEY    → "MiniMax-M2.7"
+#                                           (BARE registered BYOK id — see the
+#                                            claude-code dispatch arm below for
+#                                            why bare, not the colon form)
 #                  E2E_ANTHROPIC_API_KEY  → "claude-sonnet-4-6"
 #                  otherwise              → "sonnet"
 #
@@ -88,24 +88,37 @@ pick_model_slug() {
     # (it is absent from manifest.json + runtime_registry.go). Its config.yaml
     # declares `runtime: claude-code` and copies the claude-code `providers:`
     # block (providers.yaml:21 "The same block is copy-pasted into the seo-agent
-    # template"), so its model dispatch is IDENTICAL to claude-code's: the
-    # MiniMax BYOK colon id (the staging-default key path), else direct
+    # template"), so its model dispatch is IDENTICAL to claude-code's: the BARE
+    # registered MiniMax BYOK id (the staging-default key path), else direct
     # Anthropic, else the OAuth `sonnet` alias. Sharing the claude-code branch
     # keeps the SSOT one place — a seo-agent run is just a claude-code run
-    # behind a productized template skin.
+    # behind a productized template skin, and (because the runtime resolves to
+    # claude-code server-side) its model must be a *claude-code-registered* form.
     claude-code|seo-agent)
       if [ -n "${E2E_MINIMAX_API_KEY:-}" ]; then
-        # Namespaced (colon) BYOK id, not bare "MiniMax-M2" (#2263 deploy-skew):
-        # bare ids can lag the deployed staging ws-server's compiled registry,
-        # so workspace-create's validateRegisteredModelForRuntime 400s the bare
-        # form on an older image. The colon-namespaced `minimax:MiniMax-M2.7`
-        # resolves the same way the proven-working sibling `moonshot/kimi-k2.6`
-        # does. It stays in the BYOK `minimax` arm (providers.yaml:851), so
-        # DeriveProvider -> provider_selection=minimax (BYOK) and the #1994
-        # byok-not-platform guard (test_staging_full_saas.sh:1000) still passes —
-        # unlike the slash/platform form `minimax/MiniMax-M2.7`, which resolves
-        # to provider=platform and would trip that guard.
-        printf 'minimax:MiniMax-M2.7'
+        # BARE registered BYOK id `MiniMax-M2.7`, NOT the colon form
+        # `minimax:MiniMax-M2.7`. On the claude-code runtime the three MiniMax
+        # spellings have three DISTINCT, intentional outcomes (provider-registry
+        # SSOT, internal#718; pinned by workspace-server/internal/providers/
+        # derive_provider_matrix_test.go, the #2263/#2274 "colon-vs-slash-vs-bare
+        # triple"):
+        #   * bare  "MiniMax-M2.7"        -> provider=minimax  (BYOK, MINIMAX_API_KEY)
+        #   * slash "minimax/MiniMax-M2.7" -> provider=platform (CP proxy bills)
+        #   * colon "minimax:MiniMax-M2.7" -> UNREGISTERED 422  (the claude-code
+        #         adapter CANNOT strip the `minimax:` prefix, so the id is not a
+        #         registered model for runtime claude-code; create-validation,
+        #         internal#718, rejects it)
+        # The bare form is registered in the claude-code `minimax` arm
+        # (registry_gen.go:88 Models=[MiniMax-M2,MiniMax-M2.7,
+        # MiniMax-M2.7-highspeed,MiniMax-M3]) and derives provider=minimax (BYOK
+        # via MINIMAX_API_KEY), so it satisfies the #1994 byok-not-platform guard
+        # (test_staging_full_saas.sh) AND passes create-validation — unlike the
+        # colon form, which 422'd "5/11 Provisioning parent workspace" with
+        # UNREGISTERED_MODEL_FOR_RUNTIME on real staging (job 295075).
+        # NOTE: the colon form IS the correct BYOK-minimax id on openclaw/hermes
+        # (those adapters DO strip `minimax:` — matrix test), but this dispatch
+        # arm only emits for claude-code/seo-agent, where bare is the right form.
+        printf 'MiniMax-M2.7'
       elif [ -n "${E2E_ANTHROPIC_API_KEY:-}" ]; then
         printf 'claude-sonnet-4-6'
       else
diff --git a/tests/e2e/test_model_slug.sh b/tests/e2e/test_model_slug.sh
index 02f81e05d..e04834003 100755
--- a/tests/e2e/test_model_slug.sh
+++ b/tests/e2e/test_model_slug.sh
@@ -48,14 +48,19 @@ run_test "hermes → slash-form (derive-provider.sh contract)"       hermes
 run_test "codex → slash-form fallback"                             codex       "openai/gpt-4o"
 run_test "claude-code → OAuth/default alias"                      claude-code "sonnet"
 
+# BARE registered BYOK id (registry_gen.go:88), NOT colon `minimax:…`. On
+# claude-code the colon form is intentionally UNREGISTERED (the adapter can't
+# strip `minimax:`) and 422s create-validation (internal#718, job 295075);
+# bare resolves to provider=minimax BYOK. Pinned by the matrix test's
+# colon-vs-slash-vs-bare triple in derive_provider_matrix_test.go.
 got=$(unset E2E_MODEL_SLUG E2E_ANTHROPIC_API_KEY; E2E_MINIMAX_API_KEY="mx-test" pick_model_slug claude-code)
-assert_eq "claude-code + MiniMax key → MiniMax model"             "$got" "minimax:MiniMax-M2.7"
+assert_eq "claude-code + MiniMax key → bare registered MiniMax model" "$got" "MiniMax-M2.7"
 
 got=$(unset E2E_MODEL_SLUG E2E_MINIMAX_API_KEY; E2E_ANTHROPIC_API_KEY="sk-ant-test" pick_model_slug claude-code)
 assert_eq "claude-code + Anthropic API key → Anthropic API model" "$got" "claude-sonnet-4-6"
 
 got=$(unset E2E_MODEL_SLUG; E2E_MINIMAX_API_KEY="mx-priority" E2E_ANTHROPIC_API_KEY="sk-ant-loser" pick_model_slug claude-code)
-assert_eq "claude-code + both keys → MiniMax priority"            "$got" "minimax:MiniMax-M2.7"
+assert_eq "claude-code + both keys → MiniMax priority (bare)"     "$got" "MiniMax-M2.7"
 
 # ── seo-agent (claude-code-adapter template variant) ──
 # seo-agent shares the claude-code dispatch branch (it reuses the claude-code
@@ -65,7 +70,7 @@ assert_eq "claude-code + both keys → MiniMax priority"            "$got" "mini
 run_test "seo-agent → claude-code default alias"                  seo-agent   "sonnet"
 
 got=$(unset E2E_MODEL_SLUG E2E_ANTHROPIC_API_KEY; E2E_MINIMAX_API_KEY="mx-test" pick_model_slug seo-agent)
-assert_eq "seo-agent + MiniMax key → MiniMax model (==claude-code)"  "$got" "minimax:MiniMax-M2.7"
+assert_eq "seo-agent + MiniMax key → bare MiniMax model (==claude-code)" "$got" "MiniMax-M2.7"
 
 got=$(unset E2E_MODEL_SLUG E2E_MINIMAX_API_KEY; E2E_ANTHROPIC_API_KEY="sk-ant-test" pick_model_slug seo-agent)
 assert_eq "seo-agent + Anthropic key → Anthropic model (==claude-code)" "$got" "claude-sonnet-4-6"
diff --git a/tests/e2e/test_priority_runtimes_e2e.sh b/tests/e2e/test_priority_runtimes_e2e.sh
index 61b852a11..68fe537d5 100755
--- a/tests/e2e/test_priority_runtimes_e2e.sh
+++ b/tests/e2e/test_priority_runtimes_e2e.sh
@@ -641,16 +641,19 @@ for r in (d.get("workspaces") or d.get("results") or []):
 ####################################################################
 # NOTE: this is now a BEST-EFFORT arm, not the REQUIRE-LIVE backbone.
 # mock (run_mock above) is the guaranteed, no-key validation that keeps
-# the gate honest. MiniMax-create is fragile in CI: the namespaced model
-# id minimax:MiniMax-M2.7 is NOT in claude-code's native model set and
-# does NOT resolve via DeriveProvider (its only prefix-owner, byok-minimax,
-# is not wired as a claude-code runtime arm), so the create is rejected
-# 422 UNREGISTERED_MODEL_FOR_RUNTIME before any provisioning (RCA core
-# registry_gen.go Runtimes["claude-code"]). Rather than red the REQUIRED
-# gate on that registry-skew (or on any transient MiniMax provisioning /
-# model-registration issue), this arm reports a best-effort MISS via
-# bestfail() and lets mock carry the validation. If MiniMax DOES come up
-# it validates as a bonus real-LLM check.
+# the gate honest. This arm uses the BARE registered BYOK id `MiniMax-M2.7`
+# (NOT the colon `minimax:MiniMax-M2.7`): on claude-code the colon form is
+# INTENTIONALLY unregistered — the claude-code adapter cannot strip the
+# `minimax:` prefix, so DeriveProvider rejects it 422
+# UNREGISTERED_MODEL_FOR_RUNTIME before any provisioning (provider-registry
+# SSOT, internal#718; pinned by derive_provider_matrix_test.go's
+# colon-vs-slash-vs-bare triple, and observed on real staging job 295075).
+# The bare id is in claude-code's `minimax` arm (registry_gen.go:88
+# Models=[MiniMax-M2,MiniMax-M2.7,MiniMax-M2.7-highspeed,MiniMax-M3]) and
+# derives provider=minimax (BYOK via MINIMAX_API_KEY), so create-validation
+# accepts it. This arm stays BEST-EFFORT (bestfail, non-gating) for transient
+# MiniMax provisioning / backend issues — mock carries the REQUIRED gate; if
+# MiniMax DOES come up it validates as a bonus real-LLM check.
 # Drives the claude-code runtime against MiniMax (BYOK) using the
 # already-present Gitea secret MOLECULE_STAGING_MINIMAX_API_KEY,
 # surfaced into the env as E2E_MINIMAX_API_KEY (same name + secret the
@@ -663,12 +666,12 @@ for r in (d.get("workspaces") or d.get("results") or []):
 #     and routes ANTHROPIC_BASE_URL → api.minimax.io/anthropic. So the
 #     ONLY tenant secret needed is {"MINIMAX_API_KEY": <key>} — exactly
 #     the SECRETS_JSON branch test_staging_full_saas.sh uses.
-#   - Model id is the NAMESPACED colon-form `minimax:MiniMax-M2.7`, the
-#     registered BYOK arm for claude-code (registry_gen.go Runtimes
-#     ["claude-code"]["minimax"]). Per core#2263 the BARE `MiniMax-M2`
-#     id can 400 on a registry-skewed ws-server build; the namespaced
-#     form resolves the way kimi's `moonshot/…` does, so it's the
-#     robust choice for the gate.
+#   - Model id is the BARE `MiniMax-M2.7`, the registered BYOK arm for
+#     claude-code (registry_gen.go:88 Runtimes["claude-code"]["minimax"]
+#     Models). DeriveProvider routes bare → provider=minimax (BYOK). The
+#     colon-namespaced `minimax:MiniMax-M2.7` is UNREGISTERED on claude-code
+#     (the adapter can't strip `minimax:`; internal#718) and 422s create —
+#     it is only the correct BYOK id on openclaw/hermes, which DO strip it.
 run_minimax() {
   echo ""
   echo "=== minimax (claude-code BYOK) happy path ==="
@@ -685,16 +688,18 @@ import json, os
 print(json.dumps({'MINIMAX_API_KEY': os.environ['E2E_MINIMAX_API_KEY']}))
 ")
   local resp wsid
-  # Namespaced BYOK model id (core#2263): bare MiniMax-M2 can 400 on a
-  # registry-skewed ws-server build; minimax:MiniMax-M2.7 is the
-  # registered claude-code BYOK arm and resolves like kimi's moonshot/…
+  # BARE registered BYOK model id `MiniMax-M2.7` (registry_gen.go:88). The
+  # colon form `minimax:MiniMax-M2.7` is UNREGISTERED on claude-code (adapter
+  # can't strip `minimax:`; internal#718) and 422s create — bare derives
+  # provider=minimax (BYOK via MINIMAX_API_KEY) and passes create-validation.
   resp=$(curl -s -X POST "$BASE/workspaces" ${ADMIN_AUTH[@]+"${ADMIN_AUTH[@]}"} -H "Content-Type: application/json" \
-    -d "{\"name\":\"Priority E2E (minimax)\",\"runtime\":\"claude-code\",\"model\":\"minimax:MiniMax-M2.7\",\"tier\":1,\"secrets\":$secrets}")
+    -d "{\"name\":\"Priority E2E (minimax)\",\"runtime\":\"claude-code\",\"model\":\"MiniMax-M2.7\",\"tier\":1,\"secrets\":$secrets}")
   wsid=$(echo "$resp" | python3 -c 'import json,sys;print(json.load(sys.stdin).get("id",""))') || true
   if [ -z "$wsid" ]; then
-    # BEST-EFFORT: MiniMax-create is fragile (see header — the namespaced
-    # model id is registry-skewed → 422). Do NOT red the gate; mock is the
-    # required backbone. Report the create response so the skew is visible.
+    # BEST-EFFORT: real MiniMax create/provision can still miss on transient
+    # backend / provisioning issues (the bare model id itself is registered —
+    # see header). Do NOT red the gate; mock is the required backbone. Report
+    # the create response so any miss is visible.
     bestfail "create minimax workspace (best-effort; mock carries the gate)" "$resp"
     return 0
   fi
diff --git a/tests/e2e/test_staging_full_saas.sh b/tests/e2e/test_staging_full_saas.sh
index 862b468a2..a39e99096 100755
--- a/tests/e2e/test_staging_full_saas.sh
+++ b/tests/e2e/test_staging_full_saas.sh
@@ -1095,7 +1095,7 @@ fi
 # identical on main's scheduled synthetic E2E and on PRs (so it is an
 # environmental backend regression, never PR-introduced).
 if echo "$AGENT_TEXT" | grep -qiF "message contained no text content"; then
-  fail "A2A — EMPTY COMPLETION (backend regression, NOT a platform/workspace-server bug). The configured model (MODEL_SLUG=${MODEL_SLUG:-?}) returned a 2xx completion with no text part; the runtime surfaced 'message contained no text content.'. Operator action: check the staging LLM backend / proxy for the canary model (the claude-code default is minimax:MiniMax-M2.7 since #2263; was bare MiniMax-M2 #2710) — empty assistant turns, not an auth/quota/boot fault. Raw: $AGENT_TEXT"
+  fail "A2A — EMPTY COMPLETION (backend regression, NOT a platform/workspace-server bug). The configured model (MODEL_SLUG=${MODEL_SLUG:-?}) returned a 2xx completion with no text part; the runtime surfaced 'message contained no text content.'. Operator action: check the staging LLM backend / proxy for the canary model (the claude-code MiniMax-BYOK default is the BARE registered id MiniMax-M2.7 — the colon minimax:MiniMax-M2.7 is UNREGISTERED on claude-code, internal#718) — empty assistant turns, not an auth/quota/boot fault. Raw: $AGENT_TEXT"
 fi
 # Generic catch-all — falls through if none of the known regressions hit.
 if echo "$AGENT_TEXT" | grep -qiE "error|exception"; then