fix(workstation): carry OS/sudo authz policy into managed-settings source + multi-tenancy doc

ADR-0015's policy change was applied live to /etc/claude-code/managed-settings.json, but that file self-deploys from the repo source scripts/workstation/managed-settings.json via the hourly reconcile (sync_managed_config). Without updating the source the next reconcile would REVERT /etc to the old 'never read other homes' rule. This updates the source-of-truth claudeMd (now byte-identical to /etc) so the change is durable + canonical, and refresh_codex_mirror propagates it to every user's ~/.codex/AGENTS.md. Also notes the access-model change in the multi-tenancy architecture doc (pointer to ADR-0015).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/architecture/multi-tenancy.md

@@ -541,7 +541,7 @@ Separate from the in-cluster namespace-owner model above, the **devvm** (`10.0.1
 
 **RBAC tiers:** `admin` (Viktor — cluster-admin, unlocked tree, secrets) · `power-user` (cluster-wide read-only, NO Secrets, via a dedicated `oidc-power-user-readonly` ClusterRole) · `namespace-owner` (admin in own namespace only). Each session acts as the user's **own** OIDC identity (kubelogin), never the admin's.
 
-**Config inheritance (live):** wizard authors the base (his chezmoi-versioned `~/.claude`). Two native layers carry it to every user — the enforced org `claudeMd` in `/etc/claude-code/managed-settings.json` (top precedence, all sessions) and per-user `~/.claude/{skills,rules,…}` **symlinks** to the base (seeded via `/etc/skel`; edits propagate live). Secrets stay per-user at mode 600, never symlinked. **The managed config self-deploys from the repo** (2026-06-10): the hourly reconcile's `sync_managed_config` installs `scripts/workstation/managed-settings.json` to `/etc/claude-code/` whenever the repo copy changes — so editing the claudeMd = edit + commit, no manual install — and `refresh_codex_mirror` regenerates each user's `~/.codex/AGENTS.md` (a static mirror of the claudeMd; only files carrying the mirror header are touched, user-customized ones are left alone). Repo-level guidance (`.claude/CLAUDE.md`, `AGENTS.md`, `CONTEXT.md` in the infra repo) reaches non-admins through their auto-freshened clones — commit + push and every user has it within the hour.
+**Config inheritance (live):** wizard authors the base (his chezmoi-versioned `~/.claude`). Two native layers carry it to every user — the enforced org `claudeMd` in `/etc/claude-code/managed-settings.json` (top precedence, all sessions) and per-user `~/.claude/{skills,rules,…}` **symlinks** to the base (seeded via `/etc/skel`; edits propagate live). Secrets stay per-user at mode 600, never symlinked. **(2026-06-26: the managed `claudeMd` now defers OS-level file access to the OS/sudo — a user holding broad `sudo` may read other users' files incl. `~/.claude`; the mode-600 / no-symlink posture is unchanged but is no longer reinforced by an agent "never read other homes" rule. See [ADR-0015](../adr/0015-os-is-the-authorization-boundary.md).)** **The managed config self-deploys from the repo** (2026-06-10): the hourly reconcile's `sync_managed_config` installs `scripts/workstation/managed-settings.json` to `/etc/claude-code/` whenever the repo copy changes — so editing the claudeMd = edit + commit, no manual install — and `refresh_codex_mirror` regenerates each user's `~/.codex/AGENTS.md` (a static mirror of the claudeMd; only files carrying the mirror header are touched, user-customized ones are left alone). Repo-level guidance (`.claude/CLAUDE.md`, `AGENTS.md`, `CONTEXT.md` in the infra repo) reaches non-admins through their auto-freshened clones — commit + push and every user has it within the hour.
 
 **Memory — homelab CLI hooks (rolled out 2026-06-21, deploy-fixed 2026-06-22):** the per-user `claude_memory` MCP was retired for the **homelab-memory hooks** — the reconcile's `install_memory` (re)installs four scripts into `~/.claude/hooks/` each run (`homelab-memory-recall.py` UserPromptSubmit recall, `auto-learn.py` Stop-hook extraction, `pre-compact-backup.sh`/`post-compact-recovery.sh`), wires them into `settings.json` if-absent + additive, and removes the old `claude_memory` MCP. **The provisioner binary itself now self-deploys from the repo** (step 0: `bash -n`-gated `install` + re-exec when `scripts/t3-provision-users.sh` differs from `/usr/local/bin/t3-provision-users`, guarded against re-exec loops / DRY_RUN mutation) — added after this very rollout sat committed-but-undeployed for a day (only the manual `setup-devvm.sh` had ever deployed the binary), so the hourly reconcile kept running the pre-memory version and emo/anca silently lost memory (recall + auto-learn never wired). A latent `set -e` abort in `install_memory` (a bare `[[ -d plugin-dir ]] && …` returning non-zero) was also fixed; it had killed the reconcile after the first user the first time it actually ran. The hooks need a `MEMORY_API_KEY` (or `CLAUDE_MEMORY_API_KEY`) in the user's `settings.json` env — the `homelab` CLI defaults the API URL, so **the key is the only hard requirement**; `install_memory` reuses an existing key and only WARNs if absent (it does NOT mint one — that's an admin Vault step, see Remaining). wizard + emo carry a key from their original MCP setup; **ancamilea is keyless → her memory no-ops until a key is minted.** (`auto-learn.py`'s passive store calls the API directly, so it additionally needs `*_API_URL` in env to avoid its local-SQLite fallback; recall + manual `homelab memory store` go through the URL-defaulting CLI and need only the key.)