docs(install): describe installer v2 and the Tailscale naming options

README, the Installation / Remote-Access / Running-As-A-Service wiki pages,
docs/security-architecture.md and CLAUDE.md describe the three-question flow,
the flags, the subcommands, the sub-path answer for an occupied :443 and why
the rename is opt-in. docs/installer-v2-plan.md is the design and the
verification record (what was measured, what still needs a fresh machine);
docs/tailscale-installer-plan.md points at it.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

CLAUDE.md

@@ -405,7 +405,7 @@ Frontend JS modules have `@fileoverview` with `@dependency`/`@loadorder` tags. L
 
 ## State Files
 
-All in `~/.codeman/`: `state.json` (sessions, settings, respawn, orchestrator, cron jobs/runs, owner tab layouts), `mux-sessions.json` (tmux recovery), `settings.json` (user prefs), `push-keys.json` + `push-subscriptions.json`, `session-lifecycle.jsonl` (audit log), `update-status.json` (self-updater progress, polled across the service restart), `docker-env-applied.json` (Compose deployment only: sha256 of the Dockerfile + compose file the running container was built from, written by `Start-Codeman.sh`, read by the self-updater's environment gate), `docker-build-source.json` (Compose deployment only: the checkout's HEAD commit and `package-lock.json` hash the `codeman-node-modules`/`codeman-dist` volumes currently reflect, written by both `Start-Codeman.sh` and a successful in-place self-update, compared to detect and refresh a volume left stale by an externally-triggered rebuild), `linked-cases.json`, `webviews.json` (saved web-tab dashboard URLs), `remote-hosts.json` + `remote-cases.json`, `docker-hosts.json` + `docker-cases.json` + `docker-exports/`, `subagent-window-states.json` + `subagent-parents.json` (subagent window layout, GET/PUT `/api/subagent-window-states`/`-parents`), `hook-secret` (per-instance), `users.json` (multi-user, mode 0600) + `admin-audit.jsonl`, `intents.json` (Read My Mind intent profiles, mode 0600), `certs/` (self-signed TLS for `--https`), `.env` (CODEMAN_USERNAME/PASSWORD fallback for the `codeman attach` CLI). Transient: `self-update-runner.sh`. Multi-user case spaces live OUTSIDE the data dir at `~/codeman-users/<username>/cases` (shared across instances like `~/codeman-cases`, override `CODEMAN_USER_SPACES_DIR`).
+All in `~/.codeman/`: `state.json` (sessions, settings, respawn, orchestrator, cron jobs/runs, owner tab layouts), `mux-sessions.json` (tmux recovery), `settings.json` (user prefs), `push-keys.json` + `push-subscriptions.json`, `session-lifecycle.jsonl` (audit log), `update-status.json` (self-updater progress, polled across the service restart), `docker-env-applied.json` (Compose deployment only: sha256 of the Dockerfile + compose file the running container was built from, written by `Start-Codeman.sh`, read by the self-updater's environment gate), `docker-build-source.json` (Compose deployment only: the checkout's HEAD commit and `package-lock.json` hash the `codeman-node-modules`/`codeman-dist` volumes currently reflect, written by both `Start-Codeman.sh` and a successful in-place self-update, compared to detect and refresh a volume left stale by an externally-triggered rebuild), `linked-cases.json`, `webviews.json` (saved web-tab dashboard URLs), `remote-hosts.json` + `remote-cases.json`, `docker-hosts.json` + `docker-cases.json` + `docker-exports/`, `subagent-window-states.json` + `subagent-parents.json` (subagent window layout, GET/PUT `/api/subagent-window-states`/`-parents`), `hook-secret` (per-instance), `users.json` (multi-user, mode 0600) + `admin-audit.jsonl`, `intents.json` (Read My Mind intent profiles, mode 0600), `certs/` (self-signed TLS for `--https`), `.env` (CODEMAN_USERNAME/PASSWORD fallback for the `codeman attach` CLI), `install.log` (installer step output, written by `install.sh`'s `run_step`) and `tailscale-rename` (the node name before `install.sh` renamed it, so uninstall can offer it back; both installer-route only). Transient: `self-update-runner.sh`. Multi-user case spaces live OUTSIDE the data dir at `~/codeman-users/<username>/cases` (shared across instances like `~/codeman-cases`, override `CODEMAN_USER_SPACES_DIR`).
 
 **Generated top-level dirs** (all gitignored — don't edit or commit): `dist/` (esbuild output), `out/`, `coverage/`, `test-results/`, `tmp/`, `screenshots-echo-diag/`. The committed gesture bundle (`src/web/public/gesture/gesture-codeman.js`) IS tracked, but its runtime wasm/model assets (`src/web/public/gesture/wasm/`, `*.task`) are fetched and gitignored.
 
@@ -468,6 +468,6 @@ Two constraints worth knowing before you touch them: the env-derived PTY buffer
 
 ## Scripts & Tunnel
 
-**`install.sh`** (repo root, ~112KB) is the public entry point: `curl -fsSL <raw url> | bash` installs Node/tmux if missing, clones to `~/.codeman/app`, builds, and offers a systemd/launchd service. The network-access prompt is 3-way: **Tailscale** (loopback bind + guided `tailscale serve --bg <port>` HTTPS setup: install/login/operator/tailnet-HTTPS-toggle, then curl-verified end-to-end), **LAN** (0.0.0.0 + password prompt), or **local-only**; it preserves the existing binding on re-runs via `read_existing_binding()`. Tailscale state is detected dynamically from `tailscale serve status --json` (no marker files); the installer must NEVER `tailscale serve reset` or touch serve mappings other than 443→Codeman's port (users have unrelated serve config). `install.sh update`, `install.sh uninstall`, and `install.sh tailscale` (retrofit Tailscale access onto an existing install) also exist; `CODEMAN_NONINTERACTIVE=1` approves system changes for automation, `CODEMAN_TAILSCALE=1` presets the Tailscale choice (never installs Tailscale non-interactively). Its CLI knowledge is a GENERATED block (`npm run generate:cli-catalog`, markers in the file), not a hand-written list: detection, the install menu and the closing reminder all read it, which is what stops the class of bug upstream `b6d0f1fa` fixed by hand (a user with only omp installed being told no AI CLI was found). ⚠️ It must stay **bash 3.2** clean — macOS ships it and the documented install is `curl | bash` under `set -euo pipefail`, so `declare -A`, `mapfile`, namerefs, `${x,,}` and here-strings are all fatal there; CI runs `bash -n` plus a real `bash:3.2` container, since expanding an EMPTY array under `set -u` is a runtime abort `bash -n` cannot see. ⚠️ It executes ONLY commands from the embedded block (`CLI_INSTALL_CMD_TRUSTED`) — there is no network fetch of the catalogue at install time to worry about at all.
+**`install.sh`** (repo root, ~140KB) is the public entry point: `curl -fsSL <raw url> | bash` installs Node/tmux/git/build tools if missing, clones to `~/.codeman/app`, builds, and offers a systemd/launchd service. Since installer v2 (2026-09-20) it is **look, ask, work, done**: `preflight_detect` prints what is on the machine, every human step runs BEFORE the build (one consent for all missing packages, ONE sudo prompt kept warm by `sudo_session_start`, the AI CLI menu, the Tailscale login/operator/HTTPS-toggle preflight), then the clone/`npm install`/build/service/serve run unattended behind `run_step` spinners (output in `~/.codeman/install.log`, tail shown on failure), and `print_done_screen` ends on the URL with a terminal QR code (the `qrcode` package Codeman already ships). The network-access question is 3-way: **Tailscale** (loopback bind + `tailscale serve`, curl-verified end-to-end), **LAN** (0.0.0.0 + password prompt), or **local-only**; it preserves the existing binding on re-runs via `read_existing_binding()`, which also reads back `CODEMAN_BASE_URL`/`CODEMAN_PORT` from the unit. ⚠️ **Tailscale is two halves on purpose**: `tailscale_prepare` (question phase: preflight, the opt-in rename, the serve SHAPE) and `tailscale_apply` (after the build: the one serve command). The shape is decided up front because it can change the service unit: when `:443` root already belongs to another app, the default is a **sub-path** (`tailscale serve --bg --set-path /codeman <port>` + `CODEMAN_BASE_URL=/codeman` in the unit; measured 2026-09-20: serve STRIPS the mount prefix before proxying, Codeman's `stripBasePath` tolerates unprefixed requests, and `--base-url` is what makes the emitted URLs carry it, verified live through the maintainer's tailnet incl. hashed assets and SSE), else a second port (8443+), replace, or skip. `detect_tailscale_serve_url` recognises all three shapes (`ts_serve_find_port_mapping`). ⚠️ **Rename is opt-in and defaults to NO everywhere** (owner decision 2026-09-20: the tailnet name is the machine's SSH identity); `--name`/`install.sh name` do it, `--yes` and non-interactive never do. Serve config is keyed by the DNS name it was written under, so `tailscale_rename_node` takes OUR mapping down first (`tailscale_remove_our_mapping`, `TS_MAPPING_REMOVED_BY_RENAME`) and it is re-added under the new name; the previous name is recorded in `~/.codeman/tailscale-rename` so uninstall can offer it back. Tailscale state is detected dynamically from `tailscale serve status --json` (no marker files); the installer must NEVER `tailscale serve reset`, touch a mapping it did not create, run `tailscale funnel` or advertise a Tailscale Service (a Service needs a TAGGED node + admin approval, so it is a docs hint only); `test/install-sh-invariants.test.ts` pins all of those plus the rename-before-shape order and the flag/header parity. A foreign `/Library/LaunchDaemons/com.codeman.web.plist` (the Mac mini's headless setup) is now LEFT ALONE rather than replaced by a LaunchAgent. Subcommands: `update`, `uninstall`, `tailscale` (retrofit), `name [<n>]`, `status` (the done screen again), `cloudflared` (the tunnel client, no longer a question in the main flow); flags `--tailscale|--lan|--local`, `--name|--no-rename`, `--service|--run|--no-start`, `--yes`, `--password`, `--port` pipe through `bash -s --` and set the same variables as their env twins (`CODEMAN_NONINTERACTIVE=1` approves system changes for automation and never installs Tailscale, renames or starts a service; `CODEMAN_TAILSCALE=1` presets the Tailscale choice). Design + verification record: `docs/installer-v2-plan.md`. Its CLI knowledge is a GENERATED block (`npm run generate:cli-catalog`, markers in the file), not a hand-written list: detection, the install menu and the closing reminder all read it, which is what stops the class of bug upstream `b6d0f1fa` fixed by hand (a user with only omp installed being told no AI CLI was found). ⚠️ It must stay **bash 3.2** clean — macOS ships it and the documented install is `curl | bash` under `set -euo pipefail`, so `declare -A`, `mapfile`, namerefs, `${x,,}` and here-strings are all fatal there; CI runs `bash -n` plus a real `bash:3.2` container, since expanding an EMPTY array under `set -u` is a runtime abort `bash -n` cannot see. ⚠️ It executes ONLY commands from the embedded block (`CLI_INSTALL_CMD_TRUSTED`) — there is no network fetch of the catalogue at install time to worry about at all.
 
 Other key scripts: `scripts/tmux-manager.sh` (safe tmux mgmt), `scripts/tunnel.sh [quick|named] start|stop|status|url` (quick = random trycloudflare URL, default; `named setup|enable` = fixed-hostname tunnel via `scripts/codeman-tunnel-named.service`; bare `start|stop|url` still means quick), `scripts/run-beta.sh` (isolated beta instance), `scripts/build-agent-image.mjs` (docker base image), `scripts/self-update.sh` (detached updater). Production services: `scripts/codeman-web.service`, `scripts/codeman-tunnel.service`. **Always set `CODEMAN_PASSWORD`** before exposing via tunnel.