docs: record the dup/last input ACK, Shift+drag and right-click copy, and multi-case adopted containers

Three behaviours landed from #375 without their doc entries: the
duplicate input ACK now carries `dup:true` and the server's watermark
(`docs/reliable-input-delivery.md` still described a bare ACK), Shift+drag
and right-click copy in the terminal (the shortcut list did not know
them), and one adopted container backing several cases at different
in-container directories (the Docker cases paragraph still implied one
case per container for adopted containers too).

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

CLAUDE.md

@@ -217,7 +217,7 @@ Codeman is a Claude Code session manager with web interface and autonomous Ralph
 
 **Remote sessions + remote SSH cases**: a case can point at a remote host. The agent runs inside a durable remote `tmux -L codeman-remote` (session name `codeman-ssh-<id>`, deliberately failing the remote Codeman's `SAFE_MUX_NAME_PATTERN` so an instance on the target host never adopts it), fronted by a LOCAL tmux pane running `ssh`. Attached (`owned:false`) sessions **detach, never kill** on tab close; owned ones propagate `kill-session`. A bounded-backoff watcher auto-reconnects dropped sessions (`remoteAutoReconnect`, default ON). ⚠️ **It revives ONLY when the durable remote tmux session is verifiably still alive** (`remoteTmuxSessionAlive()`, a `has-session` probe over ssh, #355): a clean agent exit (Ctrl-C, Ctrl-D, `exit`) tears that session down, and `isPaneDead()` cannot tell it from a transport drop, so the watcher used to relaunch a FRESH agent after every clean exit (claude only looked fine because its `|| --resume` fallback masked it). An unreachable host answers `undefined`, which also means do not revive. ⚠️ `has-session` prints NOTHING on success, so the probe is classified by EXIT STATUS (`classifyRemoteAliveExit`: 0 alive, ssh's 255 or a timeout unknown, anything else gone); reading stdout classified every live session as gone and silently disabled transport-drop reconnects. The answer is cached per session and forgotten whenever the pane is seen alive again, or a stale `true` from one transport drop would revive the next clean exit. ⚠️ **File reads in a remote case are the second ssh surface** (#415, `src/remote-files.ts`): they go through `buildSshConnectionArgs()` as well, a browser-supplied path is only ever a `shellescape`d token, an unreachable host answers 502 (never 404), the size cap uses the REMOTE size, and no remote file is ever copied onto the server's disk — which is why writes, office previews and thumbnails are deliberately unsupported over ssh (the `PUT` guard sits BEFORE the local path validation, or a same-named local directory such as an sshfs mount takes the write). The probe's symlink resolution FAILS CLOSED (a path it cannot canonicalize is a 404, never its own unresolved string: the directory-only fallback let a `notes.txt -> ~/.ssh/id_rsa` link pass containment), and ssh children are BOUNDED by `src/remote-ssh-limiter.ts` plus one batched probe per attachment-history listing, because terminal output in a remote session is written on the remote host and a prompt-injected agent can print hundreds of `codeman://attach` links. The ATTACHMENT routes (a clicked path outside the case dir) go through the same layer, and which host a record is read from follows the SESSION, never the path string. ⚠️ **Command-injection surface: every ssh command line must flow through `buildSshConnectionArgs()`**, which `shellescape`s every user field. Never hand-build an ssh line elsewhere. ⚠️ Run flows must route remote cases through `POST /api/quick-start`, not `POST /api/sessions` (which stat-validates `workingDir` locally and has no `caseName`). → [architecture-invariants#remote-sessions-over-ssh](docs/architecture-invariants.md#remote-sessions-over-ssh), [#remote-ssh-cases](docs/architecture-invariants.md#remote-ssh-cases), `docs/remote-sessions.md`
 
-**Docker cases**: a case can point at a **container**, with any of the CLI run modes running inside it. Like remote-SSH this is a **LOCATION OVERLAY on cases, never a `SessionMode` of its own**. Exactly one long-lived container **per case**, shared by all its sessions, so killing a session kills only that session's in-container tmux and **never** `docker stop` while siblings remain. The workspace is a real host dir bind-mounted at the **same absolute path**, which is what keeps file-routes/watchers on real host bytes and makes the in-container transcript projHash match the host. Credentials are **seeded** (RO mount, copied into the container once) rather than shared RW, so in-container CLIs never write refreshed tokens back to the host, and bind mounts are excluded from `docker commit` so exports stay secret-free. **NEVER a create-time `-e` for secrets, NEVER `--privileged`, NEVER the docker socket.** Config drift is detected via a label hash and a drifted launch is REFUSED rather than silently launched with stale config. ⚠️ A case may instead **ADOPT** a container the user already runs (`DockerCase.owned === false`, mirror of remote-SSH's `owned:false`): Codeman only `exec`s into it and never creates, starts, stops, restarts or removes it, so a missing or stopped container FAILS CLOSED with an actionable message instead of being fixed. Absent = owned, so existing cases are byte-identical. The guarantee is enforced at four independent layers because it cannot be observed by using the feature: `buildDockerStopCommand`/`buildDockerRemoveCommand` throw during pure STRING CONSTRUCTION, `removeDockerContainer` refuses again, drift reports "none" (an adopted container carries no `codeman.confighash` label, so a real comparison would 409 the launch forever), and the boot reaper skips it. ⚠️ Two lifecycle touches the original design missed and that are easy to re-introduce: the full-image export `docker commit`s the container (refused for an adopted case) and the workspace export `docker pause`s it first (skipped — it freezes the owner's processes for the length of the tar). ⚠️ `owned` is applied AFTER `dockerConfigHash`, which takes an explicit field list, or every pre-existing case would trip the drift gate at once. ⚠️ Run modes for a container case come from the CONTAINER (`availableModes`, live-probed): gating the run menu on HOST CLIs (#201) is right for local sessions and wrong here, since a host with no `claude` may run a container that ships one. ⚠️ **A failed probe means opposite things per ownership** — for an ADOPTED case it is a fault worth reporting, for an OWNED one it is the NORMAL state before the first session (the launch chain creates the container), so treating it as a fault hid every agent mode on every freshly linked Docker case behind "start it yourself first". That is why `CaseInfo.docker.owned` is on the wire. ⚠️ Claude is launched WITHOUT `--dangerously-skip-permissions` when the container's exec user is root (Claude Code refuses the flag as root and the refusal is visible only inside the container); which flag to drop is a per-CLI fact, so it is the registry's `overlays.docker.rootCommand`, never a branch. ⚠️ Adoption is **admin-only in multi-user mode**, unlike `docker-link`: linking creates OUR container, whose one bind mount `isWorkingDirAllowed` has already confined, while an adopted container's mounts belong to its owner and one mounting `/` hands the adopter the host. The same reasoning admin-gates the container listing and the in-container directory browser; the preflight instead admits a non-admin for a container already linked to a case they own, because the run menu probes it for every docker case. ⚠️ On the loopback-only prod bind a container cannot reach 127.0.0.1, so in-container hooks need `CODEMAN_DOCKER_BRIDGE_HOOKS=1`; otherwise idle detection falls back to output-based. → [architecture-invariants#docker-cases](docs/architecture-invariants.md#docker-cases), `docs/docker-cases.md` (user guide), `docs/docker-cases-plan.md` (design)
+**Docker cases**: a case can point at a **container**, with any of the CLI run modes running inside it. Like remote-SSH this is a **LOCATION OVERLAY on cases, never a `SessionMode` of its own**. Exactly one long-lived container **per case**, shared by all its sessions, so killing a session kills only that session's in-container tmux and **never** `docker stop` while siblings remain. The workspace is a real host dir bind-mounted at the **same absolute path**, which is what keeps file-routes/watchers on real host bytes and makes the in-container transcript projHash match the host. Credentials are **seeded** (RO mount, copied into the container once) rather than shared RW, so in-container CLIs never write refreshed tokens back to the host, and bind mounts are excluded from `docker commit` so exports stay secret-free. **NEVER a create-time `-e` for secrets, NEVER `--privileged`, NEVER the docker socket.** Config drift is detected via a label hash and a drifted launch is REFUSED rather than silently launched with stale config. ⚠️ A case may instead **ADOPT** a container the user already runs (`DockerCase.owned === false`, mirror of remote-SSH's `owned:false`): Codeman only `exec`s into it and never creates, starts, stops, restarts or removes it, so a missing or stopped container FAILS CLOSED with an actionable message instead of being fixed. Absent = owned, so existing cases are byte-identical. ⚠️ An ADOPTED container may back SEVERAL cases at different in-container directories (`classifyAdoptContainerConflict` in `docker-hosts.ts`: an exact twin on the same container AND directory is refused, an owned container still backs exactly one case, and a container another user adopted is refused), which is what the Add Case panel's "copy an existing case" picker relies on; the wire carries `CaseInfo.docker.owned` ONLY when false, so the picker tests `=== false`, never truthiness. The guarantee is enforced at four independent layers because it cannot be observed by using the feature: `buildDockerStopCommand`/`buildDockerRemoveCommand` throw during pure STRING CONSTRUCTION, `removeDockerContainer` refuses again, drift reports "none" (an adopted container carries no `codeman.confighash` label, so a real comparison would 409 the launch forever), and the boot reaper skips it. ⚠️ Two lifecycle touches the original design missed and that are easy to re-introduce: the full-image export `docker commit`s the container (refused for an adopted case) and the workspace export `docker pause`s it first (skipped — it freezes the owner's processes for the length of the tar). ⚠️ `owned` is applied AFTER `dockerConfigHash`, which takes an explicit field list, or every pre-existing case would trip the drift gate at once. ⚠️ Run modes for a container case come from the CONTAINER (`availableModes`, live-probed): gating the run menu on HOST CLIs (#201) is right for local sessions and wrong here, since a host with no `claude` may run a container that ships one. ⚠️ **A failed probe means opposite things per ownership** — for an ADOPTED case it is a fault worth reporting, for an OWNED one it is the NORMAL state before the first session (the launch chain creates the container), so treating it as a fault hid every agent mode on every freshly linked Docker case behind "start it yourself first". That is why `CaseInfo.docker.owned` is on the wire. ⚠️ Claude is launched WITHOUT `--dangerously-skip-permissions` when the container's exec user is root (Claude Code refuses the flag as root and the refusal is visible only inside the container); which flag to drop is a per-CLI fact, so it is the registry's `overlays.docker.rootCommand`, never a branch. ⚠️ Adoption is **admin-only in multi-user mode**, unlike `docker-link`: linking creates OUR container, whose one bind mount `isWorkingDirAllowed` has already confined, while an adopted container's mounts belong to its owner and one mounting `/` hands the adopter the host. The same reasoning admin-gates the container listing and the in-container directory browser; the preflight instead admits a non-admin for a container already linked to a case they own, because the run menu probes it for every docker case. ⚠️ On the loopback-only prod bind a container cannot reach 127.0.0.1, so in-container hooks need `CODEMAN_DOCKER_BRIDGE_HOOKS=1`; otherwise idle detection falls back to output-based. → [architecture-invariants#docker-cases](docs/architecture-invariants.md#docker-cases), `docs/docker-cases.md` (user guide), `docs/docker-cases-plan.md` (design)
 
 **Docker Compose deployment** (`docker/`, contributed): Codeman itself runs in a container and spawns Docker cases as **SIBLING** containers through the mounted host socket (Docker-outside-of-Docker), never nested. That inverts one assumption the bare-host path takes for granted: the daemon no longer shares Codeman's filesystem, so a bind source valid *inside* Codeman means nothing to it. `resolveDockerDaemonMountSource()` translates sources under HOME into the daemon's namespace via `CODEMAN_DOCKER_HOST_HOME`, and `CODEMAN_CASES_PATH` points the cases dir at a host-absolute bind mount so a workspace resolves to the SAME absolute path on both sides (which is what keeps the transcript projHash matching, per Docker cases above). ⚠️ **`CODEMAN_CASES_PATH` must move every consumer or none**: it is resolved once in `config/cases-dir.ts` because `src/cli.ts` resolves case paths too, and when only the server's `CASES_DIR` learned the override, `codeman skill install --case <name>` reported "Case not found" on exactly the deployment the override exists for. ⚠️ **`.dockerignore` patterns match the WHOLE context-relative path**, so a bare `.env` line excludes only the ROOT file: `docker/.env` (which holds `CODEMAN_PASSWORD` and any provider keys) rode `COPY . .` into the image until `**/.env` was added — verified in both directions with a real build context. ⚠️ A Compose LONG-form bind (`type: bind`) **creates a missing host source directory ROOT-OWNED** rather than refusing. `Start-Codeman.sh` pre-creates both `CODEMAN_APPDATA_PATH` and `CODEMAN_CASES_PATH` on the host before `up`, which is what keeps the daemon from ever having to materialise either as root in the first place; the container ALSO starts as root (`cap_add: [CHOWN, DAC_OVERRIDE, KILL, SETGID, SETUID]` against the base `cap_drop: ALL`; `test/docker-entrypoint.test.ts` pins that list) so `docker/entrypoint.sh` can correct a bind source that turns up root-owned anyway (a restored backup, a cleared directory, plain `docker compose up` run without the script) before dropping to `PUID:PGID` via `setpriv` — a directory owned by neither root nor `PUID:PGID` is never re-owned, since that ownership is not this container's to reassign; it is PROBED for writability as the runtime account (`setpriv ... test -w`, so ACLs, group-writable trees and CIFS/NFS mounts pass) and refused with a message naming path, owner and PUID:PGID if that fails. ⚠️ `KILL` is in that list for tini, not the entrypoint: `init: true` keeps tini as root while the server runs as PUID, and without CAP_KILL its SIGTERM forward fails and the server is SIGKILLed on every `compose down`/`restart` instead of flushing state. ⚠️ `/opt/codeman-cli` (the runtime-owned CLI prefix) is APPENDED to `PATH`, never prepended, and the entrypoint pins its own `PATH` to the system dirs: the root part of the start resolves `setpriv` by bare name, and a prefix ahead of `/usr/bin` let a planted `setpriv` run as uid 0 (measured). `CODEMAN_DOCKER_DISABLE_SWAP_LIMIT=1` drops `--memory-swap` (and filters only that one kernel warning) for hosts without swap accounting; `--memory` still applies. ⚠️ The deployment ALSO self-updates in place (the repo bind mount at `/opt/codeman` + a restart-by-exiting supervisor) — see Self-update below and `docs/docker-self-update.md` before touching `server.Dockerfile`, the compose file or `.env.example`, since each is an input to the updater's environment gate. `docs/docker-compose.md` + `docker/README.md` (user guides)
 
@@ -350,7 +350,7 @@ Frontend JS modules have `@fileoverview` with `@dependency`/`@loadorder` tags. L
 
 **Respawn presets**: `solo-work` (3s/60min), `subagent-workflow` (45s/240min), `team-lead` (90s/480min), `ralph-todo` (8s/480min), `overnight-autonomous` (10s/480min).
 
-**Keyboard shortcuts**: Escape (close), Ctrl+? (shortcut overlay), Ctrl/Cmd/Alt+K (session palette), Ctrl+W (kill), Ctrl+Tab (next), Alt+[/] (prev/next tab), Alt+1-9 (switch tab), Ctrl+Shift+{/} (move tab left/right), Shift+Enter or Ctrl+Enter (newline), Ctrl+C (copy selection, else interrupt) / Ctrl+Shift+C (copy, never interrupts), Ctrl+L (clear), Ctrl+Shift+R (restore size), Ctrl+Shift+V (voice input), Ctrl/Cmd +/- (font), Shift+Wheel (local scrollback when mouse passthrough is active). Rebindable via the registry.
+**Keyboard shortcuts**: Escape (close), Ctrl+? (shortcut overlay), Ctrl/Cmd/Alt+K (session palette), Ctrl+W (kill), Ctrl+Tab (next), Alt+[/] (prev/next tab), Alt+1-9 (switch tab), Ctrl+Shift+{/} (move tab left/right), Shift+Enter or Ctrl+Enter (newline), Ctrl+C (copy selection, else interrupt) / Ctrl+Shift+C (copy, never interrupts), Ctrl+L (clear), Ctrl+Shift+R (restore size), Ctrl+Shift+V (voice input), Ctrl/Cmd +/- (font), Shift+Wheel (local scrollback when mouse passthrough is active), Shift+drag (start a selection in a stripped-DECSET pane, where xterm's own Shift branch is unreachable and a Shift+drag used to select nothing; `_installShiftDragSelection`), right-click (copy the selection, the mintty/PuTTY convention, since xterm paints into a canvas and the native menu has no Copy for it; with nothing selected the native menu is left alone). Rebindable via the registry.
 
 ### Security
 

docs/architecture-invariants.md

@@ -66,7 +66,7 @@ Tests: `test/docker-hosts.test.ts`, `test/docker-exec-options.test.ts`, `test/do
 
 ### Input delivery and WS resilience
 
-**Input**: `session.writeViaMux()` for programmatic/curl input — tmux `send-keys -l` (literal) + `send-keys Enter`. Single-line only (fire-and-once). Interactive **browser** input goes through a durable **exactly-once** layer: each frame carries a stable `clientId` + monotonic per-session `seq`, persisted to localStorage until the server ACKs (`{t:'ia',seq}` over WS, or HTTP 2xx), so a dropped link/reconnect can't lose or double-deliver a prompt. **WS resilience** (#149): the upgrade URL carries `cid = clientId + ':' + perTabNonce`, and `ws-connection-registry.ts` supersedes only same-TAB reconnects (two tabs on one session coexist; input frames keep the bare `clientId` for seq dedup); reconnects back off exponentially (attempts preserved across `_connectWs`), and the header connection chip renders from a real `_wsState` lifecycle (`connecting`/`connected`/`fallback`/`reconnecting`/`disconnected`).
+**Input**: `session.writeViaMux()` for programmatic/curl input — tmux `send-keys -l` (literal) + `send-keys Enter`. Single-line only (fire-and-once). Interactive **browser** input goes through a durable **exactly-once** layer: each frame carries a stable `clientId` + monotonic per-session `seq`, persisted to localStorage until the server ACKs (`{t:'ia',seq}` over WS, or HTTP 2xx), so a dropped link/reconnect can't lose or double-deliver a prompt. A duplicate is ACKed as `{t:'ia',seq,dup:true,last}` so a client whose persisted counter rolled back below the server's watermark can lift itself out instead of typing into a silently dead terminal (`docs/reliable-input-delivery.md`). **WS resilience** (#149): the upgrade URL carries `cid = clientId + ':' + perTabNonce`, and `ws-connection-registry.ts` supersedes only same-TAB reconnects (two tabs on one session coexist; input frames keep the bare `clientId` for seq dedup); reconnects back off exponentially (attempts preserved across `_connectWs`), and the header connection chip renders from a real `_wsState` lifecycle (`connecting`/`connected`/`fallback`/`reconnecting`/`disconnected`).
 
 ### Per-session env overrides: exact-key allowlist and CLAUDE_CONFIG_DIR
 

docs/reliable-input-delivery.md

@@ -50,8 +50,17 @@ each `(clientId, seq)` at most once, so a resend can't type the prompt twice.
   last-applied is seen. A replayed/lower seq returns `false`. Bounded MRU map
   (`MAX_INPUT_DEDUP_CLIENTS = 256`).
 - **WS route** (`ws-routes.ts`) — parses optional `cid`/`seq` on `{t:'i'}`; applies
-  via `shouldApplyInput` (skips a duplicate, still ACKs with `{t:'ia',seq}` so the
-  client drops it). Untagged frames apply unconditionally (no behavior change).
+  via `shouldApplyInput`. An applied frame is ACKed with `{t:'ia',seq}`; a duplicate is
+  ACKed as `{t:'ia',seq,dup:true,last:<watermark>}`, where `last` is the server's
+  highest applied seq for that `clientId` (`Session.lastInputSeq`). The client drops
+  the record either way, and on `dup` it lifts its own counter to `last` first and
+  re-sends a FIRST-attempt record (a retry being called a duplicate is the mechanism
+  working: the original landed). Without `last`, a tab killed between a send and the
+  persisted counter write came back counting BELOW the server's watermark, and every
+  later keystroke was dropped-but-ACKed: a silently dead terminal a reload could not
+  fix, since the stale counter was restored from localStorage too. The client now
+  persists the counter synchronously on every send for the same reason. Untagged
+  frames apply unconditionally (no behavior change).
 - **POST route** (`/api/sessions/:id/input`) — optional `seq`/`clientId` in
   `SessionInputWithLimitSchema`; a deduped duplicate returns 200 without writing
   (the 200 is the client's ACK). `curl`/legacy callers omit the fields and always