chore(z-ai): retire harness — no active subscription

Removes harnesses/contexts/z-ai/v1/. Mirrors the agent-runtimes
companion PR — the z-ai harness was never cut over to ESO and
there's no active subscription. Revival path documented in
agent-runtimes planning/future/providers F49.

Removed:
- harnesses/contexts/z-ai/v1/{harness.yaml, init.sh}

Updated:
- CLAUDE.md — drops z-ai from the 'no secrets in this repo'
  context list. Retirement note added.
- gitea-admin/v1/init.sh — comment ref to z-ai removed.
- gitea-https/v1/init.sh — comment ref to z-ai removed.

No composites layer z-ai (verified via grep across composites/);
no model registry entries reference it.

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

CLAUDE.md

@@ -99,7 +99,7 @@ layers:
 
 ### No secrets in this repo
 
-This is a public framework repo. Secrets (provider API keys, SOPS-encrypted env files) belong in per-installation private repos attached at a lower CRS priority. The `z-ai/v1`, `minimax/v1`, `alibaba-model-studio/v1` contexts here declare the structure but leave `provider.sops.env` to the installation repo.
+This is a public framework repo. Secrets (provider API keys) live in OpenBao via M22 ESO, never in the framework. The `minimax/v1` context here declares the structure; the live credential is mounted by ESO from the per-installation OpenBao instance. (Z.ai and Alibaba Model Studio contexts are retired but revivable — see agent-runtimes `planning/future/providers` F49 / F50.)
 
 ## Adding a New Harness Context
 

harnesses/contexts/gitea-admin/v1/init.sh

@@ -13,7 +13,7 @@
 # This was previously broken: the wrapper `cat`d the ESO mount path which
 # the agent could not read. Discovered during the M22 Phase 9 audit; the
 # wrapper-script approach was never re-validated post-cutover. Stage-and-
-# wrapper-points-at-stage matches gitea-ssh / gitea-https / minimax / z-ai.
+# wrapper-points-at-stage matches gitea-ssh / gitea-https / minimax.
 #
 # Rotation handling: per-container init. Long-running sessions need a
 # future scripts.control_loop hook to re-stage between operations.

harnesses/contexts/gitea-https/v1/init.sh

@@ -12,7 +12,7 @@
 # inside an init.sh-generated helper script, which silently failed because
 # the helper runs as agent and the ESO file is root:root mode 0400. The
 # stage-and-helper-points-at-stage pattern matches gitea-ssh / minimax /
-# z-ai / anthropic-cloud-paul-oauth.
+# anthropic-cloud-paul-oauth.
 #
 # Rotation handling: per-container init. Ephemeral container agents
 # always pick up the latest mounted token. Long-running sessions need a

harnesses/contexts/z-ai/v1/harness.yaml

@@ -1,28 +0,0 @@
-kind: context
-name: z-ai
-version: 1
-description: "Z.ai GLM coding plan — Anthropic-compatible proxy"
-requires: []
-provides: [claude-code]
-
-env:
-  ANTHROPIC_BASE_URL: "https://api.z.ai/api/anthropic"
-  CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS: "1"
-  CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC: "1"
-  DISABLE_PROMPT_CACHING: "1"
-
-secrets_required:
-  - name: z-ai
-    account_ref: "z-ai"
-    mount_path: /run/agent/secrets/z-ai
-    # 0400 (root-only) — defense in depth. The agent user cannot read this
-    # mount. init.sh runs as root and stages the auth_token into the agent's
-    # home with mode 0600. apiKeyHelper points at the staged copy. Matches
-    # the gitea-ssh pattern; if the ESO Secret later carries additional
-    # files (e.g. base_url is already there), they remain inaccessible.
-    mode: "0400"
-
-scripts:
-  init: "./init.sh"
-
-# TODO: Add network_hosts for api.z.ai when context harnesses support it

harnesses/contexts/z-ai/v1/init.sh

@@ -1,69 +0,0 @@
-#!/bin/bash
-# z-ai init — stage the auth_token for the agent user and wire apiKeyHelper.
-#
-# Threat model: keep the ESO mount root-only (mode 0400) so the agent user
-# cannot directly read /run/agent/secrets/z-ai/*. init.sh runs as root and
-# stages a single per-secret copy of auth_token into the agent's home with
-# mode 0600. Only that staged file is reachable by the runtime; any other
-# files in the ESO Secret (e.g. legacy base_url) stay root-only.
-#
-# Rotation handling: this is a one-shot copy at container start. Ephemeral
-# container agents always run init.sh per task — no rotation gap there.
-# Long-running sessions need a future scripts.control_loop hook to refresh
-# the copy between agent CLI invocations.
-#
-# Auth wire-up: apiKeyHelper output routes to `Authorization: Bearer <value>`
-# when ANTHROPIC_BASE_URL is non-anthropic.com (set in harness.yaml to
-# https://api.z.ai/api/anthropic). The secret value never enters env or any
-# process' /proc/<pid>/environ.
-
-set -euo pipefail
-
-ESO_AUTH_TOKEN="/run/agent/secrets/z-ai/auth_token"
-
-if [ ! -r "$ESO_AUTH_TOKEN" ]; then
-    echo "ERROR: $ESO_AUTH_TOKEN not readable. Check ESO ExternalSecret acct-<z-ai-id>." >&2
-    exit 1
-fi
-
-AGENT_USER="${AGENT_USER:-agent}"
-AGENT_HOME=$(getent passwd "$AGENT_USER" | cut -d: -f6)
-if [ -z "$AGENT_HOME" ] || [ ! -d "$AGENT_HOME" ]; then
-    AGENT_HOME="/home/$AGENT_USER"
-fi
-
-# Stage the auth_token into a per-secret path owned by agent, mode 0600.
-STAGED_KEY_DIR="$AGENT_HOME/.claude/secrets"
-STAGED_KEY="$STAGED_KEY_DIR/z-ai-auth-token"
-mkdir -p "$STAGED_KEY_DIR"
-chown "$AGENT_USER:" "$STAGED_KEY_DIR" 2>/dev/null || true
-chmod 0700 "$STAGED_KEY_DIR"
-install -m 0600 -o "$AGENT_USER" -g "$AGENT_USER" "$ESO_AUTH_TOKEN" "$STAGED_KEY"
-
-# Wire apiKeyHelper at the staged copy.
-CONFIG_DIR="${CLAUDE_CONFIG_DIR:-$AGENT_HOME/.claude}"
-mkdir -p "$CONFIG_DIR"
-chown "$AGENT_USER:" "$CONFIG_DIR" 2>/dev/null || true
-chmod 0755 "$CONFIG_DIR"
-
-SETTINGS_FILE="$CONFIG_DIR/settings.json"
-
-if [ -f "$SETTINGS_FILE" ] && command -v jq >/dev/null 2>&1; then
-    TMP=$(mktemp)
-    jq --arg helper "cat $STAGED_KEY" \
-       '. + {apiKeyHelper: $helper}' \
-       "$SETTINGS_FILE" > "$TMP"
-    mv "$TMP" "$SETTINGS_FILE"
-else
-    cat > "$SETTINGS_FILE" <<EOF
-{
-  "apiKeyHelper": "cat $STAGED_KEY"
-}
-EOF
-fi
-
-chown "$AGENT_USER:" "$SETTINGS_FILE" 2>/dev/null || true
-chmod 0644 "$SETTINGS_FILE"
-
-echo "z-ai auth_token staged at $STAGED_KEY (0600 $AGENT_USER:$AGENT_USER)"
-echo "z-ai apiKeyHelper wired in $SETTINGS_FILE"