# AGENT_TODO — Worklist & Idea Backlog

Living list of what we are doing, what is next, and what we might do later.
Deep history lives in git: `git log --follow AGENT_TODO.md`, `git blame`, and
the individual feature commits — the **Done** section below is just a readable
summary (newest last).

## Conventions

- **Now** — items actively being worked on this session (only a few).
- **Next** — queued, well-scoped items.
- **Later** — idea backlog. Ideas marked **NOT NOW** were evaluated and rejected
  for the stated reason; revisit only if circumstances change.
- When a task is completed: move it from Now/Next into **Done** (dated one-line)
  in the same commit that finishes the work.

## Done

- **2026-08-13** — Fix scrcpy apt install on the live box: preinstall `apt install` failed with `Unable to locate package scrcpy` (Debian/Ubuntu need contrib/universe for `scrcpy`, and the apt build is older anyway). Removed `scrcpy` from `preinstall.sh` PACKAGES (kept `adb`); `scrcpy` now installs via the existing optional app `apps/media/scrcpy.sh` (GitHub latest, bundles adb) — docs (POS.md, howto/communication.md) and the tool's deps-guard error reworded to lead with that path. Re-verified: `bash -n`, stub suite 21/21, `make gen && make check` green.

- **2026-08-13** — `pos communication scrcpy` (`bin/pos-communication-scrcpy`): wrapper over scrcpy+adb for Android mirroring/control. Subcommands: bare `scrcpy` (mirror — config defaults + verbatim pass-through of any scrcpy flag; no device → friendly error + hints), `devices` (`adb devices -l`), `record [file] [--headless]` (default `$SCRCPY_RECORD_DIR/<device>_<date>.mp4`, `--headless` = `--no-playback` for headless servers), `tcpip [port]` (USB→wireless switch + prints `connect` with the auto-detected device IP), `connect <ip[:port]>` (adb connect + mirror `-s`), `push` (default `/sdcard/Download` = scrcpy's own default), `pull`, `screenshot` (`adb exec-out screencap -p` → PNG in RECORD_DIR), `info` (model/android/sdk/serial via getprop). Config scope `scrcpy` (`~/.config/linux_post_install/scrcpy.env`, `pos config scrcpy`): `SCRCPY_SERIAL/MAX_SIZE/MAX_FPS/BIT_RATE/FULLSCREEN/RECORD_DIR/PUSH_TARGET/EXTRA_FLAGS`, env-var precedence. Deps `scrcpy` + `adb` added to preinstall PACKAGES; docs note the apt build is older and point to the existing `apps/media/scrcpy.sh` app installer (GitHub latest, bundles adb) — researched 2026 releases (current v4.1). Conventions: `# POS:`/`# POS_SUBCMDS:`/`# POS_CONFIG:` headers, deps guards before `-h|--help`, no stdin → no INTERACTIVE_CMDS. Verified: `bash -n`, stub-PATH suite `/tmp/opencode/scrcpy-run-test.sh` 21/21 green (fake adb/scrcpy echo-args, HOME isolation, env/file precedence, rc paths, screenshot bytes), `make gen && make check` green, dispatch via `pos communication scrcpy --help`. Docs: POS.md communication table + detail block, howto/communication.md section, HOWTO.md index + env row, AGENT_Context Common Tasks row + gen'd tree/dispatch/filetable.

- **2026-08-13** — Entertainment-module hardening (approved Tier 1 + Tier 2): delivery moved to `notify_send` (platform follows `NOTIFY_PLATFORM`, default Telegram) via `lib/notify.sh` sourced by `bin/pos-entertainment-send`; a **last-run state** is recorded per plugin (`~/.local/share/linux_post_install/entertainment/last/<plugin>` — rc + timestamp) on every non-`--print` run and shown by `pos entertainment status`, which also lists installed-but-not-enabled plugins; a send that fails **while fired by a timer** (gated on `$INVOCATION_ID`) additionally notifies the configured platforms. New **message-safe plugin lib** `lib/entertainment-plugin-lib.sh` (defines only `plugin_*`, never writes stdout — the stdout contract stays "message only"): `plugin_load_config` (entertainment.env + env precedence), `plugin_have`, `plugin_require`, `plugin_err`, `plugin_http_json <url> [--key <jq>] [-H <header>]` (curl `--max-time 20 --retry 2`); `weather`/`joke`/`gold` refactored onto it. `pos entertainment config` gains `get|unset|ls|edit` (edit via the shared `pos config` UI — added to `INTERACTIVE_CMDS`). **Tier 2**: new shared lib `lib/user-timers-lib.sh` (only `ut_*`: `ut_interval_to_oncalendar`, `ut_interval_label`, `ut_unit_name`, `ut_write_unit_pair` incl. `TimeoutStopSec=5s` + `Persistent` + network-online deps, `ut_ensure_linger`, `USER_SYSTEMD_DIR`) dedupes the systemd user-timer machinery between `lib/entertainment-lib.sh` and `lib/scheduler-lib.sh` (the latter's `sched_*` duplicates deleted; both source it; collides-with-nothing). `install.sh` Phase 2 lib list += the two new libs; SCRIPTS.md/DEV.md/POS.md/howto/entertainment.md/AGENT_Context updated (hand-maintained lib rows: entertainment-lib 354→311, scheduler-lib 830→760, +112 user-timers-lib, +67 plugin lib). Verified: `bash -n` everywhere; smoke-tested in an isolated `HOME=/tmp/enttest` (status, config get/set/unset/ls, send path rc=0, failing plugin records rc=1, error-case message hygiene); `make gen && make check` green.

- **2026-08-13** — Fast pos-unit shutdown: every systemd unit a pos tool writes (or `systemd/` ships) now sets `TimeoutStopSec=5s` (+ `KillMode=control-group` on the daemons) so a stuck process can't stall a reboot for the 90s systemd default. Applied at all 7 template sites: `pos-communication-telegram-listener`, `pos-communication-matrix-listener` (also gained a `trap 'kill $(jobs -p) 2>/dev/null; exit 0' TERM INT` in `run_daemon` so stop returns sub-second), `pos-network-download` (aria2 + retry-healer units), `lib/scheduler-lib.sh` `sched_write_units`, `lib/entertainment-lib.sh` `write_units`, and `systemd/{ssh-agent,autostart,usb-automount}.service`. Legacy-unit cleanup: the repo no longer ships `pos-health.{service,timer}` / `pos-entertainment.service` (they were documented but postinstall never created them — found stale only on the live box, FAILED); removed their stale references from SYSTEMD.md (deleted the `pos-health.service` section + gating special-case, added a new **Stop behavior** section), POS.md, HOWTO.md, howto/system.md (now documents the `pos system schedule` job replacement + removal commands), AGENT_Context (tree, phase description, selfcontained table). DEV.md Best Practices gains a **Systemd units** convention (TimeoutStopSec=5s + TERM trap + regeneration caveat). Verified: `bash -n` on all edited scripts; `make gen && make check` green (filetable rows for the two listeners + network-download auto-regenerated, hand-maintained lib rows bumped 350→354 / 822→830). Live-box application is manual (this session was a Google Cloud Shell, not the real machine): regenerate units via `pos network download start`, `pos communication telegram listener --enable`, `pos system schedule enable <job>`, `pos entertainment enable <plugin>`, then `sudo systemctl disable --now pos-health.timer pos-health.service 2>/dev/null; sudo rm -f /etc/systemd/system/pos-health.{service,timer} && sudo systemctl daemon-reload`.

- **2026-08-13** — Bootstrap output transparency (`install.sh` / `preinstall.sh` / `postinstall.sh`): removed the redundant `apt update` (preinstall.sh owns it — install.sh previously ran it twice, showing two identical `OK apt update` lines); Phase 2 now names what it installs — libs line (`libs -> /usr/local/bin (644): common.sh flags.sh …`), plugin names in the count line, x64_bin names, per-feature `feature installed/overwritten` + `feature flag set` logs with a `N features installed: …` summary — and the misleading `"47 scripts + libs"` label is fixed to `47 scripts + 6 libs` (the 6 libs were outside the counter); preinstall prints `Installing N packages (apt install -y):` with the 40-name list wrapped at 80 cols; postinstall now logs silent skips — `config/authorized_keys is empty — nothing to add` (empty file previously looped zero times with no message), `schedule.d already exists, keeping it` (restructured the condition so the message is accurate when the dest exists vs config/schedule.d absent), and a per-service `service enabled: <name>` line. No output-layer changes (no `--verbose`, no log file — decided scope). Verified: `bash -n` + `--dry-run` smokes of phases 1/2/3 showing every new line (learned: `install.sh:19` hardcodes `export DRY_RUN=0`, so an env `DRY_RUN=1` is ignored — the flag `--dry-run` is required), hand-maintained filetable count rows bumped (install.sh 206→223, preinstall.sh 73→75, postinstall.sh 163→168), `make gen && make check` green. usb-automount left live (user choice).

- **2026-08-13** — `usb-automount` feature, integrated exactly like `autostart`: `features/usb-automount.sh` (root-guard re-exec via sudo; first-root-run self-install of udev rule `/etc/udev/rules.d/99-usb-automount.rules` — `ACTION=="add", KERNEL=="sd[a-z]*", SUBSYSTEM=="block", ENV{ID_BUS}=="usb", TAG+="systemd", SYSTEMD_WANTS="usb-automount.service"` — + `udevadm control --reload` + `trigger --subsystem-match=block`; an existing/edited rule is never overwritten; scans `lsblk -J` for unmounted removable partitions/raw whole-disk filesystems, mounts each at `/media/<label>` — vfat/exfat/ntfs world-writable via `-o umask=000`, fallback plain mount, label-collision bump `-2`/`-3`, no label → `usb-<name>`, logs `${HOME:-/root}/.usb-automount.log`) + `systemd/usb-automount.service` (`Type=oneshot`, `WantedBy=multi-user.target` — boot + hotplug + manual `systemctl start usb-automount`), gated in postinstall.sh's systemd loop exactly like autostart (`flag_is_set usb-automount` → skip with hint). Purpose: a plugged-in stick is auto-mounted world-writable, ready for `pos system backup`'s post-verify USB copy. Docs: SYSTEMD.md (service section + gating code block), SCRIPTS.md (feature section + systemd bullet + TOC), AGENT_Context tree + filetable rows (postinstall.sh count corrected 152→163 — it was already 6 lines stale), README index rows. Verified with a stub suite (`/tmp/opencode/usb-automount-test` — lsblk JSON fixtures, mount/mountpoint/udevadm/sudo stubs, `MOUNT_BASE`/`UDEV_RULES_DIR` seams, HOME isolation): 47/47 green. `make gen && make check` green. Gotcha learned: `${VAR:-{...}}` with a `{` inside the parameter-expansion default mis-parses in bash (emits a stray `}` — printf of a multi-line value showed `}}`); avoid braces in `:-` defaults.
- **2026-08-13** — `pos system backup` copies the finished backup to a USB stick. Detection runs **after** the archive verifies (so a stick plugged in while the backup ran is found; if none is mounted, one re-scan prompt before giving up — `s` skips, EOF from cron skips silently, rc stays 0). Single stick → y/N confirm; several → numbered pick (0 = skip). Copy lands in `<usb>/backups/` (mkdir -p; `chmod 600` best-effort — vfat chmod failures warn, never fail), and the transfer is proven 100% by **sha256 source-vs-copy** before any success is announced: mismatch → warn with both hashes + `notify_send "USB copy FAILED…"` + rc=1 (the ERR trap is re-armed mid-script so a USB-phase failure no longer notifies "Backup FAILED"). Detection: `lsblk -J` → recursive jq filter (rm==true && mounted && type part|disk, space-safe via JSON) or pinned `BACKUP_USB_ROOT` seam (= `<root>/backups/`, skips detection — also the test seam). Docs: usage() Environment, POS.md backup row, howto/system.md (USB section + env table + mismatch troubleshooting), DEV.md system.env list. Verified with a stub suite (`/tmp/opencode/backup-test` — sudo/gpg/lsblk/sender stubs, HOME isolation, per-test lsblk JSON fixtures, corrupting-cp + vfat-chmod override stubs): 40/40 green (skip s/EOF, seam y/n, detect single, multi pick 2/0, re-scan after replug, corrupt copy rc=1 + honest notify, vfat tolerance). `make gen && make check` green.
- **2026-08-13** — `pos share smb-server share` now guards the two common `NT_STATUS_ACCESS_DENIED` causes at share time (warnings only): `--users` entries missing from the Samba passdb (`pdbedit -L`, cut to user column, `grep -qxF` per user — pointer to `pos share smb-server adduser <user>`), and ancestors of the share path lacking `other:+x` traversal (sticky dirs like `/tmp` count as traversable via the `t` slot; fix hint `chmod o+x <dir>`). Both wired into the `share` case after `require_root_dir`; howto/share.md SMB section + troubleshooting updated. Rooted in `reports/bug-report-smb-server-access-denied.md` (committed as the spec). Verified with a stub-PATH suite (`/tmp/opencode/smb-test` — pdbedit/systemctl/smbcontrol/testparm/smbpasswd stubs, `SMB_CONF` seam): 16/16 green.
- **2026-08-13** — Docs hardening from the schedule-session review (sole-developer call: terse, session-learned). DEV.md §7 env-seam registry now lists `USER_SYSTEMD_DIR` (`bin/pos-network-download`, `bin/pos-communication-{telegram,matrix}-listener`, `lib/scheduler-lib.sh`) + the scheduler's `SCHEDULE_*` seams, and documents the missing-`:-`-guard gotcha (a `VAR="${XDG…:-…}"` without leading `VAR:-` overrides the seam — stub runs then silently write to the real `$HOME`; fix: `USER_SYSTEMD_DIR="${USER_SYSTEMD_DIR:-…}"`). New-tool test checklist gains an env-seam review step (grep for unguarded config writes + prove with `VAR=/tmp/x`). §7 notes stub harnesses are throwaway by design — build in `/tmp/opencode/<tool>-test/`, leave there, keep only the pattern. howto/schedule.md documents that `migrate` copies the rule LHS **verbatim** as `COMMAND` (old tool never had `disk root`/`loadavg` shorthands — rewrite those jobs with real commands). `make check` green.
- **2026-08-12** — `pos system event-trigger` (eventer) generalized into `pos system schedule` — the scheduler replaces the single-timer threshold monitor with **per-job systemd user timers** (`pos-schedule-<name>.{timer,service}`, `Persistent`, ExecStart `run <name>`, reconciled on `enable`/`disable` — orphan units + the legacy `pos-event-trigger` timer auto-removed). Each job is a chmod-600 file `~/.config/linux_post_install/schedule.d/<name>.env`: `INTERVAL` (`5m..59m`/`1h..23h`/`hourly`/`daily`/`weekly`/`OnCalendar=…`), `NOTIFY` policy, optional `MSG`, `RULE` (threshold only), and `COMMAND` = **literal remainder of the line** (pipes/quotes/`sudo` need no escaping). Policies: `always` (full output every run), `onchange` (diff vs last run, first run always sends), `onerror` (non-zero exit or empty output), `threshold` (old event-trigger behavior: first numeric vs `RULE`, alert on false→true + recovery, per-job firing state), `never` (silent side-effect jobs — no notify; run log + last-run record still kept). Per-run logs/state in `~/.local/share/linux_post_install/schedule/{logs,state}/`. Subcommands: `run [name|all]`, `list`, `config` (interactive add/edit/remove/enable/disable with validation), `enable [name|all]`, `disable [name|all]`, `status`, `migrate` (converts legacy `event.env` rules → `schedule.d/rule-N.env` threshold jobs, adopts the legacy timer's OnCalendar or 5m, removes the old timer). Files: `bin/pos-system-event-trigger` → `bin/pos-system-schedule`, `lib/eventer-lib.sh` → `lib/scheduler-lib.sh` (git mv; installed by install.sh), `config/event.env` + `config/event-rules.template` → `config/schedule.d/` starter jobs (nvme-health via `sudo -n smartctl` with the user's exact grep — sudoers NOPASSWD documented; cpu-temp + disk-root thresholds; silent log-cleanup), postinstall installs them no-clobber into an empty `schedule.d/` (legacy `event.env` users get a migrate hint instead). `bin/pos` EXAMPLES + INTERACTIVE_CMDS (`system-schedule config`) updated. Supersedes the "Tier 2: watch plugins" backlog idea. Docs: POS.md system row rewritten, howto/event-trigger.md → howto/schedule.md (job syntax, policies, NVMe recipe, migration), HOWTO.md index row + config table + scheduling bullet, AGENT_Context lib row + Common Tasks row. `make gen && make check` green; stub-harness suite (fake `systemctl`/`sudo`/`smartctl`/`sensors`/`df` + fake telegram sender logging, env seams `SCHEDULE_DIR`/`SCHEDULE_STATE_DIR`/`SCHEDULE_LOG_DIR`/`USER_SYSTEMD_DIR`/`SCHED_LEGACY_ENV`) covers all 5 policies (threshold cross/recover/no-repeat, onchange first/diff/same, onerror, always, never-silent), COMMAND literal-pipe parsing, enable/disable/status + orphan/legacy cleanup, migrate (incl. skip-existing + dry-run), and dispatch.
- **2026-08-12** — `pos network download replace <gid> <url>` + fresh-link status advisory. `status` now flags stopped errored downloads whose source is marked permanently failing in `download.retry` (`needs fresh link: <name> (<gid>) — pos network download replace … <new-url>`; one `tellStopped` RPC, id-match in jq). `replace <gid> <url>` re-queues a dead single-file HTTP/FTP download with a new URL keeping the same `dir` + file name (partial resumes via `--continue=true`), unmarks the old source (`retry_unmark`, literal `grep -vxF` — URL-safe), and reuses `retry_verify` so a dead replacement link is diagnosed + marked permanent; torrents/active/multi-file are rejected with hints; `--dir/--split/--tmux` supported. `retry_verify` hardened to `${quiet:-0}` so it works outside `cmd_retry`. Stub suite grew a `replace` section (advisory match, success + unmark + advisory-clear, dead new link marked, torrent/active/arg errors, prefix gid) — tellStopped fixtures gained `uris` (real aria2 includes them). 141/141 green; docs: POS.md row + outage paragraph, howto/network.md dead-link recipe. `make gen && make check` green.
- **2026-08-12** — `pos network download` grows outage resilience: `restart <gid>` (re-queue from history — torrents via rebuilt magnet `urn:btih:` + `&tr=` trackers, HTTP via original URIs with `dir`/`out` preserved, `--continue=true` resumes partials; options `--dir/--seed/--split/--tmux`), `retry <gid|all>` (smart retry — waits out internet outages via `NET_PROBE` seam, re-queues, `retry_verify` polls the new gid; aria2 error 3 = real problem → diagnosed + marked permanent in `~/.config/linux_post_install/download.retry` as `url:<uri>`/`bt:<infohash>`, `retry all` skips them, manual restart overrides; `--once`/`--quiet` timer mode; `--interval`/`--max-wait`), and the **retry healer** systemd user pair (`pos-aria2-retry.service` oneshot `retry all --once --quiet` + `pos-aria2-retry.timer` 2min, `Persistent`) that arms on download start (`add`/`torrent`/`metalink`/`restart`) and disables itself when nothing is left; `watch <gid>` now auto-restarts its download after an outage. Fixes from stub-suite review: `ensure_healer` was missing from the three submit paths; `RESTART_NAME` was lost across `do_restart`'s process-substitution subshell (now a `download_name()` helper); `restart` exited 1 because the `[ tmux -eq 1 ] && tmux_watch` test was the function's last statement. Verification: stub-based test harness (`/tmp/opencode/dl-test` — curl/systemctl stubs with tellStatus fixtures, `NET_PROBE` file-flip, unit enable/disable logging) 119/119 green, incl. new restart/retry/healer/watch-heal cases. Docs: POS.md download rows + outage-resilience paragraph, howto/network.md outage recipe, SYSTEMD.md per-user units section, AGENT_Context + completions regenerated. `make gen && make check` green.
- **2026-08-11** — Docs: DEV.md / AGENTS.md / AGENT_Context improved from the SMB session's lessons. DEV.md: new "Testing tools that need root / systemd / missing deps" (env-override test seams — `FLAGS_DIR`/`SMB_CONF`/`SMB_CREDS_DIR`/`UNIT_DIR` precedents — + stub-PATH fakes + PTY prompt driving via `script`); new Best Practice "Managed Config Blocks" (start/end marker idiom incl. the `inblock == 1` awk guard, validate-then-apply, hot reload); deps-guards-run-before-`--help` made explicit (previously only inferable by reading the NFS tools); "Update the docs" checklist completed (howto index/section, Common Tasks row, AGENTS.md Quick facts, AGENT_TODO Done move). AGENTS.md: clarified which filetable line-count rows are hand-maintained (non-`pos-*` files above the marker) + when to bump them; deps-guard clause added to Quick facts. AGENT_Context "Adding a New Tool" steps 6–7 mirror the above. `make gen && make check` green.
- **2026-08-11** — `share` category grows SMB: `pos share smb server` (`bin/pos-share-smb-server`) + `pos share smb client` (`bin/pos-share-smb-client`), completing the share trio (usb/nfs/smb). **Server:** `status`/`share`/`unshare`/`list`/`adduser`/`deluser`/`reload`/`enable`/`disable`; idempotent marker blocks in `/etc/samba/smb.conf` (`# >>> pos-managed share: <name>` … `# <<< end pos-managed share` — hand edits outside markers survive; `inblock==1`-guarded awk so removing one block never eats another's end marker), `testparm` validation before apply + `smbcontrol smbd reload-config` hot reload; `--read-only`/`--guest`/`--users u1,u2` flags with unrestricted-share warnings; `smbpasswd` user management (prompts, requires system user first). **Client:** `mount`/`unmount`/`list`/`persist`/`unpersist`; password prompt via `/dev/tty`, throwaway chmod-600 credentials for one-shot mounts, persistent creds at `/etc/samba/credentials/<name>` (chmod 600); `persist` writes a systemd `.mount` unit (`systemd-escape`) with `x-systemd.automount` + `_netdev` — mounts on first access, never blocks boot. Both source `lib/notify.sh` for mutations; added to `INTERACTIVE_CMDS` (prompting subcommands). Deps: `samba` + `cifs-utils` added to preinstall PACKAGES. `SMB_CONF`/`SMB_CREDS_DIR`/`UNIT_DIR` env-overridable for tests (FLAGS_DIR precedent). Docs: POS.md share rows, howto/share.md SMB sections, HOWTO index row, AGENT_Context Common Tasks, AGENTS.md categories. `make gen && make check` green; logic tested via stubbed PATH + temp config (marker idempotency, guest + user persist flows).

- **2026-08-11** — `pos network checkport` nmap overhaul: two-pass engine — pass 1 = fast `-Pn -T4 --max-retries 1` scan of only the asked ports (was: all 65535) with per-port state + nmap service names; pass 2 (`--versions`, opt-in) = `-sV --version-light` on open ports only (generous host-timeout — version probing a silent service otherwise made nmap skip the host entirely), fallback fast banner probe for open TCP with no version info; TCP fast path ~2s for 3 ports. Unprivileged UDP now falls back to the nc engine (Debian nmap `-sU` requires root and quit outright); IPv6 hosts get `-6`; `no output`/filtered states set rc=1; `--timeout` scales nmap host-timeouts. New `--versions` flag in `# POS_FLAGS:` (completions regenerated) + usage text; port-metadata fallback retained. `make gen && make check` green.

- **2026-08-11** — `pos communication matrix sender login` error reporting: captures HTTP status + Matrix `errcode`/`error` from the JSON body (temp file, not stdout) instead of a generic "wrong credentials?" message — distinguishes unreachable homeserver from rejected credentials; auto-prepends `@` when `--user` is bare (e.g. `--user alice:example.org` → `@alice:example.org`).

- **2026-08-11** — New `share` category — `usb` and `nfs` moved out of `pos usb` / `pos system` into `pos share`: `pos share usb server` (was `pos-usb-server`), `pos share nfs server` + `pos share nfs client` (were `pos-system-nfs-*`). Renamed the three tools (`bin/pos-share-*`), updated `# POS:` headers/usage strings, `INTERACTIVE_CMDS` (`usb-server` → `share-usb-server`), `bin/pos` usage() EXAMPLES, and the notify-scope comment in `pos-system-backup`. Docs: new `DOC/howto/share.md` (USB + NFS consolidated; `howto/usb.md` deleted, NFS sections stripped from `howto/system.md`), POS.md `### share` section (replaces `### usb`, nfs rows moved out of `### system`), HOWTO/README indices, AGENT_Context hand-written spots, root README, DEV.md `INTERACTIVE_CMDS` example, AGENTS.md categories. Category is the home for future `smb`. `make gen && make check` green; `/usr/local/bin` refreshed.

- **2026-08-09** — Matrix/Synapse `communication` tools — `pos communication matrix sender` + `listener`, completing the second notify platform `lib/notify.sh` was designed for (`NOTIFY_PLATFORM=telegram,matrix` fan-out; the sender implements the `send <value> [--markdown]` contract via `notify_sender_name()`'s default key→tool mapping, no lib changes). **Sender** (`bin/pos-communication-matrix-sender`): `send <value> [--markdown] [--room <id|alias>]` PUTs `m.room.message` (`m.text`) to the client-server API v3 — room ids/aliases URL-encoded (`#pos:example.org` → `%23pos%3A…`), unique per-message txn id, `--markdown` sends `org.matrix.custom.html` via a best-effort markdown→HTML converter (bold/italic/code/fences/strike/links/headers/lists, escapes HTML, never fails the send); `login --user <@id>` (masked password prompt → `m.login.password` → saves `access_token`+`user_id`); `test`. Config scope `matrix` (`~/.config/linux_post_install/matrix.env`, `MATRIX_HOMESERVER`/`MATRIX_ACCESS_TOKEN`/`MATRIX_USER_ID`/`MATRIX_ROOM_ID`, secret masked) registered via `# POS_CONFIG:` → `pos config matrix` + tab-completion scope. **Listener** (`bin/pos-communication-matrix-listener`): systemd **user** daemon (`pos-matrix-listener.service`) long-polling `/sync` (30s timeout, per-sync `since` token, compact filter dropping presence/account_data/device noise, `m.room.message` only); reacts to `MATRIX_USER_ID`'s own messages (resolved via `/account/whoami` if unset), `MATRIX_ROOM_ID` restricts to one room; `/` and `!` both resolve; replies threaded `m.in_reply_to`; `@quiet` no-reply marker; `/cmd::desc=…` map descriptions; `ai …` bridge (`pos ai gemini ask`, per-room session `matrix-<room>`, `ai /reset` clears, markdown stripped); interactive editor (`--status`/`--enable`/`--disable`/`--run`), 60s command timeout, exit-code prefix, ~3800-char truncation. `communication-matrix-listener` added to `INTERACTIVE_CMDS` (stdin editor + forever-loop daemon). Docs: POS.md rows + "in detail" sections + ai bridge note, howto/communication.md rewritten Matrix sections, HOWTO.md index + config table + platform note, `bin/pos` usage EXAMPLES; `make gen && make check` green. Verified against a mock homeserver: send plain/markdown/`--room`/test request shape (URL-encoding, Bearer auth, JSON body), login token save, listener owner-filter + `/status` reply + `/help` + `@quiet` silence + non-zero exit reply + interactive editor add. — state-based threshold rule monitors (eventer). Each line of `~/.config/linux_post_install/event.env` is an independent rule: `["<msg>" if ] <check-command> <op> <threshold>` (op `> < >= <= == !=`, unit suffix ok `60c`/`80%`). The check command is run on every pass and its **first numeric output** compared float-safe; operator detected as the rightmost `op threshold` pair so checks containing their own `>`/`<` (awk, redirection) parse fine. Alerts once on false→true plus one recovery message on true→false (no repeats while a condition holds); per-rule state in `~/.local/share/linux_post_install/eventer/state/` keyed by rule-line hash (editing a rule resets its state). Subcommands: `run` (timer entrypoint), `config` (interactive add/remove/edit with validation by test-running the check), `list` (rules + live values), `enable [interval]` (systemd **user** timer `pos-event-trigger.timer` + oneshot service; `5m…weekly` or `OnCalendar=…`; graceful warnings when no user systemd manager, `loginctl enable-linger` attempt), `disable`, `status`. `--dry-run` honors the DEV.md dry-run convention. Alerts via `lib/notify.sh` (Telegram default; other platforms via `NOTIFY_PLATFORM`). New: `bin/pos-system-event-trigger`, `lib/eventer-lib.sh`, `config/event.env` template (installed no-clobber by postinstall), `lib/eventer-lib.sh` installed by install.sh, `system-event-trigger` added to `INTERACTIVE_CMDS`, usage EXAMPLES row. Docs: POS.md system row, HOWTO.md index row, howto/event-trigger.md; `make gen && make check` green; functional tests covered trigger/recovery/no-repeat, float + unit parsing, editor add/remove/edit + validation + dry-run, timer enable/disable/status (graceful), dispatcher routing.

- **2026-08-09** — `pos media mp3`/`mp4` hardened + smart format selection. Both tools: yt-dlp calls go through `spawn` (honor `$DRY_RUN`; `--dry-run` prints the exact command and skips dep checks), `-o/--output`, `--no-playlist`, `--cookies` (file existence check), clean ffmpeg/yt-dlp guards, `# POS_FLAGS:` for completion, full metadata (`--embed-metadata --embed-chapters --embed-thumbnail --no-overwrites`, mp3 also `--convert-thumbnails jpg` + `--parse-metadata "%(artist,uploader)s:%(artist)s"` so the uploader fills the artist tag). mp3 gains `--by-artist` (`~/Music/<artist>/<title>.mp3`). mp4 gains `-f <id>` / `--best` / `--worst` (no prompt), conflict validation, and an interactive picker that shows a **curated** `-F` table (`[audio]`/`[video]`/`[combo]` grouping, raw clutter dropped) on stderr — stdout carries only the chosen id (ui_pick lesson) — with id validation against the real table and empty/best default. Docs: howto/media.md rewritten (flags, metadata, by-artist, troubleshooting); `make gen && make check` green.

- **2026-08-09** — Telegram `ai …` now answers about a message you reply to: the listener extracts `reply_to_message.text` (falls back to `caption`) from each update and passes it to `handle_message`; the AI bridge prefixes the prompt with `[Reply context — the message you are replying to]`. So replying to a `/status` output and asking `ai check this details` gives the model the actual output. Applies only to the AI bridge (mapped `/commands` untouched); reply context rides in the user turn so the session records what was analyzed. Docs: howto/ai.md bridge section.

- **2026-08-09** — `pos ai gemini` sessions + Telegram-friendly replies. `--session <name>` gives `ask`/`chat` persistent memory (`~/.local/share/linux_post_install/ai/<name>.json`, capped at 40 turns, pruning keeps the first user turn as scene); new `sessions` subcommand (list / `reset <name>`). Telegram listener now keeps one session per chat (`telegram-<chat_id>`) with `ai /reset` to clear. New `--system "<text>"` flag injects a Gemini `systemInstruction` (via `jq` merge) sent every turn but never stored in the session file; the listener passes a Telegram-voice prompt ("reply like a friendly Telegram chat, use emojis") and strips markdown (`**`, `*`, backticks, `#`, links, lists, blockquotes) from replies before `sendMessage`, since messages go out as plain text. Docs: howto/ai.md (flags, sessions, bridge memory/formatting), `make gen && make check` green.

- **2026-08-09** — Fixed `pos config` secret-value corruption: `cfg_read_secret`'s cursor-advance `echo` went to stdout and, since the function is called via `$(...)`, a leading `\n` ended up inside every secret value → the env file got `AI_GEMINI_API_KEY="\n<key>"`, unreadable by `cfg_value`/`load_config` (menu showed `(not set)`, `pos ai gemini` demanded a key). The newline now goes to the terminal (`echo >&2`). Defense in depth: `cfg_write`/`write_config_key` strip CR and truncate multi-line pastes (warn), `cfg_value` and the ai/telegram `load_config`s strip CR on read. Verified on a real PTY (piped tests couldn't reproduce — non-TTY stdin skips the echo path).

- **2026-08-09** — `ai` category — `pos ai gemini` (ask/chat/models) via Google Gemini REST API. `ask` prints only the answer (pipe/script/Telegram-friendly), `chat` is a multi-turn REPL (q/quit/Ctrl+C, `/reset`, empty input re-prompts), `models` lists generateContent-capable ids and flags the default; `--model` override; default `gemini-2.5-flash`. Config scope `ai` (`AI_GEMINI_API_KEY` secret + `AI_GEMINI_MODEL`) in `~/.config/linux_post_install/ai.env`, edited via `pos config ai`; `config/ai.env` template installed no-clobber by postinstall; `ai-gemini` added to `INTERACTIVE_CMDS`. Telegram listener now answers non-command messages starting with `ai ` via `pos ai gemini ask` (owner chat only; error replies carry the `pos config ai` hint) — future intents (reminders) slot in as more case arms in `handle_message`. Docs: POS.md `ai` section + listener bridge, howto/ai.md, HOWTO/README index rows, `bin/pos` usage example.

- **2026-08-09** — Entertainment plugins `gold` + `weather` now emit emoji-visualized Telegram messages. Gold: headline is USD/**gram** (XAU/oz ÷ 31.1034768), ounce as reference, bid/ask, cleaned timestamp (`+00:00`/fractional seconds stripped). Weather: per-WMO-code emoji (☀️/🌙 day-night aware for clear sky), °C + feels-like, humidity, wind with unit spacing. Both verified live; emojis are safe in the default plain send mode.

- **2026-08-09** — `pos tree`: prints the live `pos` command tree (categories → commands → subcommands) by deriving the hierarchy from `bin/pos-*` filenames + `# POS:` / `# POS_SUBCMDS:` headers, so it always matches what the dispatcher can run. Category-less like `pos-config`; `--depth N` limit; `pos help tree` works. Docs: POS.md `tree` section, `bin/pos` usage example, `make gen` regenerated the AGENT_Context tree/dispatch/filetable + `_pos_flags[tree]`.

- **2026-08-09** — Telegram sender `config` / `config set` removed — redundant with `pos config telegram` (same `# POS_CONFIG:` registry, masked token display + input, chat-id validation, chmod 600); sender/listener error hints now point there. Deep-review bugfixes in the same commit: mapped `/command` values containing `|` are no longer truncated (`load_map` switched from a `|` to a `\x1f` delimiter — previously `/up=echo hi | head` silently ran `echo hi `); `pos entertainment send <plugin> [args…]` actually forwards the extra args (every arg was `shift`ed in the flag loop, so `$@` was empty) and passes `--` before the message so leading-`-` plugin output isn't parsed as an option; `write_config_key` (entertainment-lib) and `cfg_write` (config-ui) replaced unescaped `sed -i "s|^K=.*|K=\"$v\"|"` with grep-v+append so values with `&`/`|`/`\` no longer mangle (also the path all telegram config now flows through); `sync_systemd` daemon-reloads after removing timer units; `digits` config validation accepts negative group/supergroup chat ids (`-100…`).

- **2026-08-09** — Fixed telegram listener editor crash on remove/edit/test: `ui_pick` printed its menu listing to **stdout**, so `idx="$(ui_pick)"` captured the menu *and* the number, and `MAP_CMDS[$idx]` (arithmetic array subscript) blew up with "syntax error in expression". Menu decoration now goes to stderr; only the picked index is emitted on stdout. Pre-existing bug (before the `::desc` work), exposed by the description column.

- **2026-08-09** — Telegram listener pushes its mapped `/commands` to the bot's `/` menu via `setMyCommands` (auto after every map edit, on `--enable`, and at daemon start; manual `--sync-commands` flag). Map lines may carry a menu description: `/cmd::short description=bash command` (falls back to the bash command, ~40 chars). Names are validated against Telegram's lowercase `[a-z0-9_]` rule — invalid ones are skipped from the menu with a warning but still resolve when typed; empty map clears the menu. Fixed latent bugs found by the sync work: `map_has` (awk `END{exit 1}` overrode the match), and `warn()` went to stdout so it leaked into the generated JSON (now stderr).

- **2026-08-09** — `pos config <TAB>` scope completion is now cached at gen time (`_pos_config_scopes` array emitted by `make gen` from the `# POS_CONFIG:` registry) instead of scanning ~40 tools per TAB — a per-keypress subshell storm that wedged interactive shells for minutes on the loaded homelab box. Two stuck `-bash` sessions (69%/38% CPU) killed. `plugin_marker`/`plugin_keys` hardened with `|| true` so `config_keys` no longer aborts mid-scan under `set -euo pipefail` on mixed lib/plugin dirs (installed layout) — fixes missing plugin keys in `pos config entertainment`.

- **2026-08-09** — `pos config <scope>` interactive config editor: reads the `# POS_CONFIG:` registry across tools into a single runtime config (`~/.config/linux_post_install/*.env`, one file per scope, chmod 600); secret masking with show/hide toggle, `digits:`/`num:`/`url:` validation, `-` to clear, blank keeps; `*plugins` marker expands plugin vars (entertainment) from `entertainment-lib.sh`; `desc::example` value-format hints shown in the editor; gen-docs now handles category-less tools (`pos-config`), fixed a `set -e`+`pipefail` bug that truncated the header registry.

- **2026-08-09** — `pos-communication-telegram` → `pos-communication-telegram-sender`: one canonical `send` (dropped the legacy `--send` flag, which duplicated the `send` subcommand in completion). `pos communication telegram <TAB>` now completes to just `sender listener`. `lib/notify.sh` maps platform `telegram` → `telegram-sender` via `notify_sender_name()`; entertainment-send + health `--send` check updated. Removed phantom subcommands from howto/communication.md (webhook/logs/broadcast/file never existed).

- **2026-08-09** — Structure/convention audit fix: `--dry-run` now truly dry (`spawn()` honors `DRY_RUN`, install.sh exports it to child phases, postinstall mutations run-wrapped); `gen-docs.sh` no longer chmods regenerated files to 0600; `make check` now syntax-checks apps/entertainment/features/templates; `.gitignore` protects `config/authorized_keys` + `config/rclone.conf`; honest `--send` confirmation; docs refreshed (notify.sh in lib lists, pos-health systemd units, tsui, scripts/, INTERACTIVE_CMDS).

- **2026-08-07** — `pos system health --send` notification-only; listener `@quiet` prefix (run mapped command without replying, for commands that self-notify). `/status=@quiet pos system health --send` = exactly one digest.

- **2026-08-12** — `pos network download` (`bin/pos-network-download`) — aria2 JSON-RPC daemon + queue control. **Daemon:** persistent `aria2c` as a systemd **user** service (`pos-aria2.service`, `${XDG_CONFIG_HOME:-$HOME/.config}/systemd/user`, `enable --now` + linger warning on headless boxes), `--rpc-listen-port=6800`, generated `RPC_SECRET` in `~/.config/linux_post_install/download.env` (chmod 600, env override), unit flags `--continue=true --max-connection-per-server=16 --split=16 --seed-time=0 --dir=$HOME/Downloads`. **Commands (18):** `start`/`stop`/`status` (+ bare overview = status+list), `add <url…> [--dir --out --split --tmux]`, `torrent <file|magnet…> [--dir --seed --tmux]` (base64 `addTorrent`), `metalink <file|url> [--tmux]`, `list` (active/waiting/stopped table), `info`/`files`/`peers <gid>`, `pause|resume|remove [gid|all]` (`--force` → `force*`), `purge`, `move <gid> <pos>`, `limit [gid] <speed>` (`--upload`, 0=unlimited, `2M`/`512K`), `set <k=v…> [--gid]`, `watch [gid]` (2s live repoll; exits when that gid completes). `--tmux` opens a detached `dl-<name>` session running `watch <gid>` (name from `--out`/URL basename, sanitized, 40-char truncate, `-2` on collision; closes itself on completion). Deps: `aria2c`/`jq`/`curl` guards before `--help`; `aria2` added to preinstall PACKAGES. No stdin → not in `INTERACTIVE_CMDS`. JSON built with `jq -nc --arg` (never string interpolation — fixes JSON-quote bugs); `# POS_SUBCMDS:` (18) + `# POS_FLAGS:` → completions. Test seams `RPC_PORT`/`RPC_SECRET`/`DOWNLOAD_DIR`/`USER_SYSTEMD_DIR`/`ACTIVE_MARKER`; 76-case stub-PATH behavior suite green (unit content, secret 600, add→gid, tables, queue ops, error paths). Docs: POS.md network row+detail, howto/network.md section, HOWTO index, AGENT_Context Common Tasks row. `make gen && make check` green.

## Now

- (none — Tier 1 shipped: `pos system health`, `lib/notify.sh`, digest timer)

## Next

- Wire alerting into more tools as they are added (default: source
  `lib/notify.sh`, call `notify_send` on success/failure).

## Later — idea backlog

- **Tier 2: `pos health` extras** — temperature/fan/load average thresholds,
  `ss -tln` port checks for known services, SMART status for disks.
- **Tier 3: backup rotation + remote target** — keep-N rotations, upload to
  rclone remote after verify, `--remote` flag, digest reports rotation age.
- **Tier 3: `pos secret` vault** — gpg/age-encrypted key-value store; backend
  for future tools that need stored tokens.
- **Tier 3: `pos inventory`** — machine manifest (OS, packages, services,
  mounted disks, USB devices) exportable as markdown/JSON.
- **Tier 4: `pos self update`** — pull repo, `make gen && make check`,
  re-run install.sh to refresh `/usr/local/bin`.
- **Tier 4: `pos new`** — scaffold a new tool from `templates/pos-tool.sh`
  (category, name, POS header, exec bit, doc stubs).
- **NOT NOW:** per-category `bin/` subdirectories — flat `bin/` + filename
  dispatch scales fine; revisit only if `bin/` passes ~40 files.
- **NOT NOW:** split `lib/entertainment-lib.sh` — fine under 600 lines; revisit
  if it grows.

## Done (summary, newest last)

- 2026-08-06: Fix entertainment timer `1h` not firing — `interval_to_oncalendar`
  emitted invalid `OnCalendar=*-*-* */N:00:00` (systemd rejects `*/N` in the hour
  field); now `*-*-* 00/N:00:00`. Dropped the cron fallback entirely: scheduling
  is systemd user timers only (`sync_cron`/`interval_to_cron`/`cron_block`
  removed), `status` simplified, `Nd` intervals rejected with a clear error.
- 2026-08-06: Nested `pos` subcommands — `# POS_SUBCMDS:` header annotation (telegram,
  docker-compose, docker-vbox) + `make gen` emits a `_pos_subcmds` completion map;
  nested tools (`telegram listener`) auto-list under their parent instead of as a
  flat sibling (`telegram-listener`) in `pos <category>` and tab-completion; generic
  tool-level completion (subcommands + flags + `--help`).
- 2026-08-06: Telegram **listener** — `pos communication telegram listener`:
  interactive `/command` → bash map editor + owner-only polling daemon as a
  systemd user service (map in `~/.config/linux_post_install/telegram_commands.env`,
  re-read per message; `/help`, unknown-command reply, 60s timeout, stdout reply).
- 2026-08-06: NFS in `pos system` — `pos system nfs-server` (status/share/
  unshare/list/reload/enable/disable, idempotent /etc/exports edits, generic
  default with Tailscale/WireGuard/LAN examples) + `pos system nfs-client`
  (mount/unmount/list + persistent mounts as systemd `.mount` units ordered
  after network-online.target, no fstab); `nfs-kernel-server` + `nfs-common`
  added to preinstall PACKAGES.
- 2026-08-06: `pos` HOW-TO guide set — `DOC/HOWTO.md` index + per-category
  `DOC/howto/*.md` (network, docker, media, system, ssh, usb, communication,
  entertainment) with flags, recipes, config, and troubleshooting; wired into
  DOC/README, root README, AGENTS.md.
- 2026-08-06: Multi-platform alerting — `lib/notify.sh` routes via `NOTIFY_PLATFORM`
  (`notify.env`, default telegram; sender contract for Matrix/Synapse later),
  `system.env` shared config for health/backup, dynamic effective values in
  `--help`, telegram `--markdown` alias.
- 2026-08-06: Tier 1 — `pos system health` (dashboard + `--send`), `lib/notify.sh`
  (wired into backup + firewall), daily digest timer via postinstall.
- 2026-08-06: Document Map index + Entertainment section in AGENT_Context (cf36780).
- 2026-08-06: Entertainment module — plugins (weather/joke/gold), `pos
  entertainment config/enable/disable/send/status`, auto-trigger + Telegram send.
- 2026-08-05: `pos communication telegram` — `--parse-mode` (plain/markdown/html).
- 2026-08-05: doc/code sync gate — `make gen` + `make check` + pre-commit hook.
- 2026-08-05: `pos usb server` — USB Redirector control tool (494eae2).
- 2026-08-05: `pos <category> --help` auto-discovery in the dispatcher.
- 2026-08-05: AGENTS.md with lazy-loaded DOC references.