After the timeago migration, the live-state template no longer reads
'now' — it computes relative labels through the filter, which derives
its own reference time.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Drop the inline humanize_delta imports and string-precomputation; pass
the raw datetime as latest_job_at / latest_build_at and let the
template apply the timeago filter. One fewer code path computing
relative-time strings.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Replaces three bespoke (now - x).total_seconds() expressions with the
shared filter, unifying vocabulary (no more '0m ago' inside the first
minute) and adding the UTC tooltip.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Preserves the existing '-' placeholder for nullable started_at /
finished_at columns.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Templates can now call {{ ts | timeago }} directly without route-side
precomputation.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Wrap humanize_delta in an HTML <time> element with datetime= and
title= attributes carrying the precise UTC value, so hovering surfaces
the exact timestamp regardless of the relative label.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Rewrite humanize_delta as a symmetric past/future ladder with
sub-minute precision. Replace the bare ISO date fallback after 7 days
with a day-month form (year suppressed when same as now). Refs spec
docs/superpowers/specs/2026-05-16-timeago-shared-display-design.md.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Migrate from pip-install-e + setuptools to a uv workspace with a
committed uv.lock for deterministic deps. Switch both members to
hatchling, and move package sources into nested standard layout
(l4d2host/l4d2host/, l4d2web/l4d2web/) so builds work from a
read-only source tree — setuptools wrote egg-info to source under
the old layout, which broke uv sync on the root-owned /opt/left4me/src.
Local dev install: `pip install -e ./l4d2host -e ./l4d2web` -> `uv sync`.
.envrc switches from `layout python python3.13` to `use uv`. Python
pinned to 3.13 via .python-version.
l4d2web now declares its cross-dep on l4d2host explicitly via
[tool.uv.sources] (workspace = true). l4d2web/alembic.ini and
l4d2web/alembic/ stay at the project root (standard alembic layout).
Test fixes:
- tests/__init__.py added to both test dirs so pytest doesn't shadow
l4d2host as a namespace package via outer-dir walk.
- 3 CWD-relative paths in tests (l4d2web/static/css/{tokens,layout}.css
and js/sse.js) anchored to Path(__file__) so they survive layout
changes.
- Two test_install.py tests now monkeypatch HOME to tmp_path so they
stop silently mutating ~/.steam/sdk32 on every run.
628 tests pass under sandboxed `uv run pytest`.
Per docs/superpowers/plans/2026-05-15-uv-workspace-execution.md;
prereq for the ckn-bw bundle's uv-sync action (queued).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The live-state grid renders player avatars as <img src="https://avatars.steamstatic.com/...">,
but the CSP img-src directive was `'self' data:` — so the browser
silently blocked every avatar load, leaving placeholder circles in
place. The DB cache and Steam API path were both healthy; only the
browser-side load was blocked.
Use the wildcard *.steamstatic.com host-source rather than pinning a
single hostname: Steam rotates avatars across steamcdn-a.akamaihd.net,
avatars.akamai/cloudflare/fastly.steamstatic.com over time, and a
single-hostname allowlist would re-break on the next shuffle.
Test now pins img-src explicitly — the previous assertions only
checked default-src/frame-ancestors/form-action, so a regression of
this exact line would have silently passed.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The hardening refactor that just landed closes the same-uid attack
surface (FS view, ptrace, /proc visibility, signals) for the web +
gameserver units via systemd directives plus system-wide
kernel.yama.ptrace_scope=2. Keeping the script-sandbox on a separate
uid was the inconsistent half-step — defense-in-depth only, with
build-time-idmap complexity attached. One principle wins: harden
once, share the uid.
scripts/libexec/left4me-script-sandbox: drop the idmap block (uid
lookups, STAGING setup, cleanup_staging trap, mount --bind
--map-users), switch User=/Group= to left4me, point BindPaths at
\$OVERLAY_DIR directly. Header comment updated to reflect
hardening-not-uid as the same-uid defense. nsenter self-wrap kept —
it's about mount-namespace escape, not uid.
Tests + comments + companion docs updated. Build-time-idmap and
overlay-idmap plans marked SUPERSEDED; user-uid-split spec revised
to "1 user is correct"; one-line update notes on the hardening
specs and the build-overlay-unit-design.
Companion ckn-bw commit removes the l4d2-sandbox user + group and
tightens /var/lib/left4me from 0711 → 0755 (the traverse-only mode
was specifically for the sandbox uid).
Janitorial item 6 in 2026-05-15-janitorial-cleanup.md. The v1 sandbox
design (2026-05-08-l4d2-script-overlays-design.md) was approved
2026-05-08 and superseded the same day by the v2 systemd-only design
(2026-05-08-l4d2-script-sandbox-v2-systemd.md). The current
left4me-script-sandbox helper uses systemd-run in service-unit mode;
no bwrap binary is invoked. The v1 spec still described bubblewrap as
the engine.
- v1 spec gets a top-of-file banner pointing at v2 as the supersede.
Body preserved; the rest of the v1 design (overlay-type unification,
resource caps, helper auth) is still valid — only the sandbox engine
changed.
- l4d2web/services/overlay_builders.py: ScriptBuilder docstring
"bubblewrap + systemd-run" → "hardened systemd-run transient
service" (the as-built reality).
- scripts/tests/test_script_sandbox.py: stray "/bwrap" in a comment
cleaned up. Negative regression assertions (`assert "bwrap" not in
text`) intentionally retained as the guard against accidental
re-introduction.
- Plan docs left untouched (historical action snapshots).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
A 20-attempts-per-60s budget keyed by IP doesn't slow a distributed brute force that rotates source IPs. Add a parallel per-username bucket with the same threshold so a single account can't burn through more than 20 failed logins/min regardless of where they come from. Empty usernames aren't bucketed (would DoS the anonymous 401 path). Successful login clears both buckets.
_load_files_overlay docs already promised "owner or admin" for mutations, but the check only filtered by overlay.type — system overlays (user_id IS NULL) were writable by any logged-in user. Add the explicit 403 for non-admins; read-only routes remain open across all overlay types.
Mirror the delete-route last-admin guard on /admin/users/<id>/deactivate so a future auth-model change (service accounts bypassing require_admin, etc.) can't accidentally lock out the system.
- login_user clears any pre-login session state before stamping user_id/pw_changed_at/admin so a fixated cookie value cannot smuggle data past the login boundary
- logout_user now session.clear()s instead of only popping user_id, removing leftover pw_changed_at/admin markers
- CSRF token comparison uses hmac.compare_digest
- load_current_user rejects sessions where the stamped admin flag no longer matches the user row, preventing a demoted admin from retaining elevated access until next password change (backward-compatible: sessions issued pre-upgrade lack the marker and pass through until next login)
- pendingCommand captured in htmx:beforeRequest (not requestConfig).
- ensureLoaded shares a single inflight Promise across concurrent calls.
- Document why synthetic null-id entries are safe in the cache.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- _console_line.html: command + reply, error variant, "(no reply)" placeholder.
- server_detail.html: console section between Live State and Files, replays
last 50 history rows server-side; HTMX form appends new lines via hx-swap.
- console-history.js: ArrowUp/Down recall against /console/history JSON;
scroll-to-bottom on load and after each new line.
- CSS: fixed-height scrolling transcript, terminal-ish styling, spinner via
HTMX in-flight class.
- test_console_routes.py: update 4 assertions from legacy [ERROR] literal
to console-error CSS class (matches new semantic markup).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- ?limit clamp test now actually verifies the clamp instead of just
passing through 5 rows.
- Single is_error assignment per branch, single db.add path.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- POST /servers/<id>/console runs a command via rcon.execute_command and
persists every outcome (success / empty / error) to command_history.
- GET /servers/<id>/console/history returns paginated newest-first JSON
for client-side up-arrow recall.
- server_detail() now passes the last 50 history rows as console_history
for server-side replay on page load.
- 404 on ownership mismatch — no admin override.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
A row per RCON command execution: (user, server, command, reply, is_error,
created_at). Composite index on (user_id, server_id, id) supports the only
query shape — "latest N for this user+server", id DESC.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Add comment noting _EXEC_REQ_ID/_MARKER_REQ_ID are arbitrary client-chosen
values unrelated to SERVERDATA_* packet-type constants. Update _connect_and_auth
docstring to accurately reflect that OSError/socket.timeout propagate raw from
post-connect send/recv, while only connect failure is wrapped in RconError.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Extracts _connect_and_auth helper from query_status, adds execute_command
using the trailing-marker pattern for multi-packet reassembly, and covers
all paths (happy path, multi-packet, empty reply, auth failure, timeout,
input validation, marker drain) with 10 new tests.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Firefox and Safari defer lazy images by one paint cycle even when cached,
causing a blank frame on each innerHTML swap. These avatars are always
in-viewport and cached after the first poll, so lazy loading has no benefit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
outerHTML removes and re-inserts the section on each tick, causing a
blank frame. Keeping the <section> as a stable DOM container and
swapping only innerHTML means avatars and text update in-place without
any teardown/reconstruct cycle.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
64x64 avatarmedium looked soft on high-DPI screens. Switching the
GetPlayerSummaries field to avatarfull (184x184) and constraining
display size to 64px via .live-state .avatar gives sharp rendering on
retina/4k panels at the cost of a slightly larger CDN fetch (still
hot-linked, so no proxying cost).
Also adds the previously-missing CSS for the live-state player grid:
avatar+name+meta arranged in a tight 2-column grid per card, link
spans the avatar+name so the meta stays non-interactive.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Wraps avatar + persona name in an a[href=steamcommunity.com/profiles/<id>]
in both the Current and Recent blocks. Steam auto-redirects to the user's
vanity URL on follow, so we don't need to store profileurl separately.
target=_blank + rel=noopener noreferrer to keep the dashboard page in
place when a link is followed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
HTMX's hx-trigger="every Ns" syntax does not accept fractional seconds —
a config override like 7.5 would render every 7.5s and silently break
auto-refresh. Floor to int with a 1s minimum.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
HTMX-refreshed /servers/<id>/live-state fragment renders snapshot
summary, current players with avatars/ping, and recent-player history;
server_detail.html bootstraps it via hx-trigger="load".
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Closes the negative-assertion gap from the Task 10 review: without this
check, a regression that drops the freshness guard would still pass the
positive 2/4 + c1m2_streets assertions.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
threading, time, Callable were imported in anticipation of Task 9's
daemon-thread startup. Task 9 will re-add them when actually needed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Source cvar semantics are last-wins; appending the rcon_password after
all overlay exec lines and blueprint config ensures no overlay or user
config line can silently override it.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- _parse_duration wraps int() in try/except so malformed connected
durations raise RconError (not ValueError leaking past the poller's
except RconError).
- fake_rcon_server captures handler exceptions and re-raises at context
exit, so a buggy test handler surfaces as a real failure instead of
silently degrading into a client-side timeout.
- Two new parser tests: HH:MM:SS duration parsing and malformed input
coverage.
- Fix Steam ID formula typo in the spec doc (Z*2 + Y, not Y*2 + Z; Y is
the low bit). Code was already correct.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The two indexes ix_sps_server_open and ix_sps_server_recent were
byte-identical because SQLAlchemy's Index(name, *cols) form drops the
DESC ordering the spec intended. Rather than reach for text("left_at
DESC"), drop the second index entirely — SQLite scans the ASC index
backwards at no measurable cost. Spec and plan updated to match.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Catch only requests.RequestException in refresh_overlay so that
server-side data errors (e.g., ValueError) bubble up as 500 rather
than being disguised as a 502 "steam api error". Update the 502 test to
use a real requests exception, add a sibling test that verifies
non-requests exceptions propagate, and explicitly assert that refresh
enqueues a build_overlay job even when Steam returns no entries.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
POST /overlays/{id}/refresh lets the overlay owner (or any admin)
re-fetch fresh Steam metadata for all items and enqueue a rebuild.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Commit 16adc5c silently dropped two defensive guards from the
symlink-creation loop in WorkshopBuilder.build. Restore them:
- refuse to overwrite a non-symlink file that collides with a workshop
name (logs a message, skips creation)
- refuse to overwrite a foreign symlink (target outside the cache root)
Also: change `skipped` from list to set (O(1) membership test, no
duplicates possible), and add a brief comment above WorkshopMetadata
construction explaining which fields download_to_cache actually uses.
Two regression tests added to pin the guard behaviour.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace the old skip-uncached-with-warning logic in WorkshopBuilder.build
with an inline download phase that calls _download_with_retry for each item
whose cache file is absent or stale (mtime/size mismatch). Stamps
last_downloaded_at / last_error after each download, and skips items with
no file_url. Update test fixture to utime cache files so mtime matches
time_updated, delete the now-superseded skip-warning test, and add six
new builder-level behavior tests covering the new download path.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Same validate_new_password used by the web change-password flow,
so the policy is enforced uniformly across CLI and HTTP entry
points. Existing CLI tests bumped to passwords that satisfy the
new floor.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Verifies that on a successful change the digest rotates, the
password_changed_at advances, this session keeps working with the
re-stamped marker, and a parallel session forged from the
pre-change marker is rejected by load_current_user.
profile_password_change now writes a naive password_changed_at so
the in-memory marker matches what SQLite returns on next read.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Implements the change-password endpoint:
- Per-IP rate limit reusing services/rate_limit
- Required fields, mismatched-confirm, policy, wrong-current
branches each redirect with a specific ?error= key
- Rotates digest + password_changed_at, then re-stamps the
current session marker so this browser stays logged in
while other sessions get rejected by load_current_user
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds the page reachable from the username link in the header.
Renders the form skeleton; the POST handler lands in the next
commit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
load_current_user now treats a session whose pw_changed_at marker
is missing, malformed, or older than the user's current
password_changed_at as logged-out. Same shape as the existing
user.active check.
Forced fan-out updates to every test fixture that forges a session
via session_transaction(): each now stamps a current pw_changed_at
marker. test_deactivated_user_existing_session_invalidated keeps
its meaning — the deactivation still flips the user to inactive,
and load_current_user rejects the session via the user.active
branch before reaching the freshness branch.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
login_user now records the user's current password_changed_at on the
session. The next commit will use this marker to invalidate sessions
whose password has been rotated under them.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Pulled the per-IP sliding-window check out of auth_routes so the
upcoming /profile/password endpoint can share it.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Single source of truth for the password policy, to be reused by the
upcoming /profile/password endpoint and (optionally) the create-user
CLI.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Backfills existing rows from created_at, then enforces NOT NULL.
Existing sessions without a pw_changed_at marker will be rejected
on next request once the freshness check lands (one-time forced
re-login post-deploy).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
First step of the self-service password-change feature: a timestamp
that backs the per-session freshness check used to invalidate other
sessions on password change.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
services/host_commands.run_command pumps each stderr line into JobLog
via on_stderr (job_worker.py:215) before it raises HostCommandError —
appending exc.stderr again as a single row produced a second copy of
the entire traceback truncated at JOB_LOG_LINE_MAX_CHARS (4096), which
was visible as the awkward duplicated/cut-off second block at the end
of failed install logs.
Split the existing `except subprocess.CalledProcessError` into two:
except HostCommandError: stderr already streamed — just record exit
code + last error summary on the job/server row. No log append.
except subprocess.CalledProcessError: catches raw CalledProcessErrors
raised outside host_commands (no pump ran), so still append stderr
to the log. Preserves the path test_called_process_error_fails_job
exercises.
New regression test asserts a HostCommandError with multi-line stderr
doesn't land as a single concatenated JobLog row.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
14 tests covering /admin/users/<id>/{deactivate,activate,delete}:
- deactivate/activate flips and 404 on unknown user
- deactivate-self refused (409)
- deactivated user cannot log in (same 401 as wrong-password)
- existing sessions stop working after deactivation (load_current_user
returns None for inactive users → @require_login redirects to /login)
- delete-self refused (409)
- delete refuses when user owns Server, Blueprint, or custom Overlay
- delete on orphan succeeds (302 → /admin/users)
- delete nulls out Job.user_id (jobs survive as audit trail)
- delete-other-admin succeeds when more than one admin exists
The "last admin" branch in the delete endpoint is defense-in-depth and
unreachable via normal flow (any path that triggers it is shadowed by
self-delete) — covered by a comment, not a test.
Three new POST endpoints on the existing admin blueprint, all guarded
by @require_admin and CSRF (per the global before_request hook):
/admin/users/<id>/deactivate flips active=False (refuses self)
/admin/users/<id>/activate flips active=True
/admin/users/<id>/delete hard delete with safeties:
- refuses self-delete
- refuses delete-of-the-last-admin
- refuses if the user owns Servers, Blueprints, or custom
Overlays (operator deletes those first via existing UIs)
- nulls out Job.user_id (jobs stay as audit trail; FK is nullable)
admin_users.html grows an Active column + an Actions column with the
appropriate button per row (none for self, Deactivate/Activate
toggle, Delete-with-confirmation modal). Modal pattern mirrors
blueprint_detail.html (same modal-close/modal-open data attrs,
csrf_token hidden field).
Refusal responses are 409 with a plain-text body (matches the
blueprint-in-use refusal at blueprint_routes.py:182). No flash
infrastructure introduced; consistent with the rest of the codebase.
All 367 existing tests still pass.
Two-pronged enforcement so deactivation has effect both for fresh
logins and already-issued sessions:
- load_current_user(): treat User with active=False as logged-out
(sets g.user=None). Existing sessions stop working immediately.
- login(): include `not user.active` in the existing 401 condition,
so deactivated accounts get the same "invalid credentials"
response as wrong-password / unknown-user — no timing oracle for
deactivation status.
Tests still green (12/12 in test_auth.py).
Default true; server_default '1'. Lets the admin UI deactivate a user
without losing the row or the user's content (servers, blueprints,
overlays). Reactivation flips it back. Migration 0008 adds the column
via op.add_column; downgrade uses batch_alter_table per SQLite ALTER
TABLE semantics, matching the 0007 pattern.
Tighter, more terminal-flavored. Mono font on the label echoes how
paths are rendered elsewhere in the tree. New-folder dialog title
also shows "/" when targeting the root.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Three bugs surfaced in browser testing, plus one UX request:
1. The Uploads panel and the binary-mode editor sub-panels stayed
visible after `el.hidden = true` because their `display: flex/grid`
rules in components.css have the same specificity as the UA's
`[hidden]{display:none}` and come later in cascade. Add a targeted
`[hidden]!important` rule for the affected classes.
2. Clicking a folder toggle inside a `files` overlay did nothing.
`file-tree.js` looked for `.file-tree-children` via
`button.nextElementSibling`, but the files-overlay row template
inserts a per-row action span between the toggle and the children
div. Switch to `closest('.file-tree-row').querySelector(':scope >
.file-tree-children')` so both row variants resolve correctly.
3. Pressing Enter on the new-folder dialog did nothing — the keydown
handler was attached with `{once:true}` inside `openNewFolder`,
so the first letter the user typed consumed the listener and Enter
never fired. Move the listener to module init so it survives
subsequent keystrokes and dialog reopenings.
UX: render the overlay root as a row inside the tree (label
"(overlay root)") rather than as a separate toolbar. The root row
carries the same `+ new file · + new folder · ⬇ zip` hover-action
column as every other folder row, so drop-on-row, hover-reveal, and
data-target-path semantics are uniform across the tree.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
webkitGetAsEntry() only returns an Entry for real OS-originated drag-drops;
synthetic DragEvents (and some browsers without folder-drop support) get
null back. Per-item fallback to getAsFile() keeps single-file drops working
in those cases without sacrificing the whole-folder upload path on real
OS drops.
Caught while end-to-end testing on the deploy box: a programmatically-
dispatched drop fired the listener and reached preventDefault(), but no
upload row appeared because the file collection loop never enqueued.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds Overlay.type='files' whose source-of-truth IS the overlay directory
itself. Users can:
* upload arbitrary files / whole folders by dragging from the OS onto a
folder row in the file tree (one POST per file, queue with
concurrency 3, per-file progress in a floating Uploads panel)
* move via drag-and-drop inside the tree (same gesture, source
distinguishes; refuses cycles)
* create / edit / rename / replace through a single editor modal
(text flavor for editable files, binary flavor with replace-upload
for everything else; filename input is the rename surface)
* mkdir empty folders (slashes allowed for nested intermediates)
* stream a folder as a zip download
* delete files and empty folders
Backend is type-agnostic past the new files_routes endpoints, so the
existing mount / spec / overlayfs / expose_server_cfg pipeline is reused
unchanged. is_editable gates the row's edit affordance and the /save
content rules. Three new safe-resolve helpers (write/delete/move) cover
the new operations with the same anchor-and-resolve pattern as listing
and download. FilesBuilder is a no-op so the build subsystem can
dispatch uniformly.
Spec: docs/superpowers/specs/2026-05-09-files-overlay-design.md
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The previous wiring attached click listeners on DOMContentLoaded, so
any [data-modal-open] / [data-modal-close] / dialog.modal element
that came in via a later HTMX partial swap silently lost its
behaviour. The server-detail Actions partial reloads its reset/delete
triggers on every state change, so reset was unclickable after the
first state change post-load.
Switch to a single delegated click handler on document. Same logic,
but matches via Element.closest() so it works regardless of when an
element was added to the DOM. No re-bind needed after HTMX swaps.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
A background thread spawned alongside the job workers polls every
server's status every STATE_POLLER_INTERVAL_SECONDS (default 30) and
writes the result via the existing refresh_server_actual_state path.
Servers with in-flight jobs (queued/running/cancelling) are skipped to
avoid racing the post-job refresh. Catches reboot drift, OOM kills,
manual systemctl operations, and any other out-of-band state change.
Spec: docs/superpowers/specs/2026-05-09-l4d2-server-lifecycle-reboot-and-drift-design.md
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds a /servers/<id>/files/download route mirroring the overlay download
endpoint. Same safety rules: real-path must resolve under LEFT4ME_ROOT
(merged view threads through `installation/` and overlay layers, all
already inside the root). The server file-tree partial now renders
download links.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Drops the inline Name input from the blueprint edit form. A Rename link
sits next to Delete in the page footer; clicking opens a one-line modal
that posts to a new POST /blueprints/<id>/rename route. The main edit
form keeps the current name as a hidden input so its full Save still
works unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds a Files section at the bottom of the server detail page that lists
the kernel-overlayfs merged view at runtime/<server_id>/merged/. Reuses
the overlay file-tree partial via two new template variables:
- files_base_url: parent passes "/overlays/<id>" or "/servers/<id>"
- download_supported: false for servers (runtime holds large game
binaries; no download endpoint), true for overlays (existing behavior)
New service helper safe_resolve_for_server_listing() rejects path
traversal beyond the merged root and returns None when the overlayfs
mount doesn't exist (server never started or just reset).
New route GET /servers/<id>/files?path=<rel> returns the lazy-load
file-tree fragment, gated to the server owner. No download counterpart.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Vendors HTMX 2.0.4 (the prior file was a 1-line stub) and uses it to poll
two new partials on a 2s tick while a job is in flight:
- /servers/<id>/actions → state badge, filtered action buttons,
last-job sentence, live job log (SSE) while a Start/Stop/Reset job
is running. When the job is terminal the partial re-renders without
hx-trigger and polling stops.
- /overlays/<id>/build-status → build state badge, last-build
sentence, live job log while a build_overlay job is running. Same
terminal-state stop behavior.
Server detail restructure:
- Editable name moves out of the page body into a Rename modal
triggered from a link next to Delete in the page footer.
- Compact dl with Port (linked as steam://run/550//+connect <host>:<port>)
and Blueprint.
- Actions row: state badge + state-filtered buttons (start/stop, reset)
+ last-job sentence. Drift warning when desired ≠ actual.
- Recent Jobs table removed.
Overlay detail restructure:
- Single panel, dl Type/Scope, no separate Last build row, no Builds
section.
- Script form gets two compound submits: "Save and build" and
"Save, reset and rebuild". Standalone Rebuild/Wipe gone.
- Build status state badge + last-build sentence under the editor;
action buttons hide while a build is in flight.
- Rename modal in the page footer next to Delete.
sse.js binds on htmx:load (covers initial document and post-swap inserts)
and closes EventSources on htmx:beforeCleanupElement to avoid leaking
streams across swaps.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Detail panels: softer (color-mix --line-soft) border. h2 sub-section
spacing inside a single outer panel. admin and job_detail collapse to
one panel each.
- Color tokens: --color-button-primary / --color-button-danger stay
saturated in dark mode so white text on filled buttons stays readable.
- Site header: transparent, no full-width bar; aligned with panel-content
width. No more sticky.
- Page-level Delete: low-contrast outline button at the page footer
(left side, justify-content flex-start). Save buttons no longer
full-width (.stack > button { justify-self: end }).
- form-actions-inline helper for right-aligned button rows.
- New service: l4d2web.services.timeago.humanize_delta — used by the
upcoming server / overlay live-status partials.
- Server route: POST /servers/<id> renames the server (mirrors the
overlay update pattern, returns 409 on per-user duplicate).
- Overlay route: POST /overlays/<id>/script handles `action` form value
— `save_build` (default) or `save_reset_build` (wipes overlay dir
before queuing build). Redirect lands on /overlays/<id> instead of
the job page so users see the live status.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Each linked overlay gets a checkbox on the blueprint detail page that opts
its server.cfg in as exec server_overlay_<id>. The web app builds the
spec with {path, alias} per overlay and prepends exec server_overlay_<id>
lines to the blueprint config in lowest-overlay-first order. The host
stages those copies in the overlayfs upper layer before mounting (avoids
copy-up writes against a sandbox-uid file). A live preview block above the
Config textarea shows what gets auto-executed.
Schema:
- alembic 0007: BlueprintOverlay.expose_server_cfg BOOLEAN
Spec contract:
- l4d2host OverlayRef(path, alias?). load_spec accepts both bare-string
and {path, alias} entries.
Side effects folded in (same file in l4d2_facade):
- start_server auto-initializes; the manual Initialize step is no longer
needed before Start.
- initialize_server no longer runs blueprint builders — builds happen on
overlay save, not on every server Start.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Replace the per-row checkbox + numeric Order table on the blueprint
detail page with a drag-to-reorder list of selected overlays plus a
native <select> for adding more. Removing uses an × button per row;
the option sorted-inserts back into the dropdown alphabetically.
Native HTML5 drag-and-drop, no library, no JS-disabled fallback.
Server contract is unchanged: each list row owns one hidden
<input name="overlay_ids">, DOM order = submission order, and the
existing fallback_position branch in ordered_overlay_ids_from_form
absorbs the now-omitted overlay_position_<id> fields.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Bash script, Arguments and Config are all structured text — render them
in a monospace font with tab-size: 4 and resize: vertical via a base
'textarea' rule in components.css. Add rows="8" + spellcheck="false"
to the blueprint Arguments/Config textareas (both edit and create
forms) so they're a sensible size and consistent with each other.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The flex 'gap' shorthand on .file-tree-row was setting row-gap as well
as column-gap, so when the .file-tree-children div wrapped to a new
line the row-gap (--space-s) added on top of the nested ul's
margin-top (--space-xs) — making the button-to-first-child gap visibly
bigger than the sibling-row gap. Switch to 'gap: 0 var(--space-s)' so
only column-gap applies; vertical rhythm is now owned exclusively by
the outer grid gap (--space-xs) and the nested ul margin-top
(--space-xs), both equal.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Two CSS fixes that together turn the rendered file tree from
'everything on one line' into an actual tree:
- .file-tree-children: flex-basis: 100% so an expanded folder's children
wrap to the next line of the parent <li> flex container instead of
flowing inline next to the toggle button.
- .file-tree-row-file: padding-left = chevron width, so file rows align
visually with sibling folder names (folder names are offset by their
chevron; files have no chevron, so without padding they'd start at
the chevron column instead of the name column). Chevron itself
pinned to width: 1ch so rotated/un-rotated states have identical
layout.
Tickrate and other seeded examples whose overlay directory exists but
hasn't been built yet rendered a visually blank Files panel — entries
was [] (not None), so the template fell through to an empty <ul>. Use
'not file_tree_root_entries' so both None (dir missing) and []
(dir empty) trigger the 'No files yet' message.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The vendored static/vendor/htmx.min.js turned out to be a 33-byte
placeholder, so the hx-get/hx-target/hx-trigger attributes on the
overlay file tree's folder buttons were inert: clicks rotated the
chevron (own JS) but never fetched. Switch the lazy-load to a
~30-line plain-JS handler in static/js/file-tree.js that fetches
button.dataset.filesUrl on first expand and dedupes via dataset.loaded.
Update the spec/plan to match. Route + partial contracts unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds a server-rendered collapsible file tree section to the overlay
detail page so users can verify what their script/workshop overlays
produced and pull individual artifacts (VPKs, configs) without SSH.
HTMX-driven lazy folder expansion with click-to-download via send_file;
symlinks land anywhere under LEFT4ME_ROOT (so workshop addons stream
from the shared cache) but escapes are refused. Same access rule as the
rest of the page (admin or owner). 39 new tests; full web suite green.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Host-side identifier (systemd unit name and /var/lib/left4me dirs) is now
str(server.id), centralized in services/server_identity.server_unit_name.
Server.name becomes a free-form display label, required and unique per
user (was [a-z0-9_-]{1,64} and globally unique).
Migration 0006 swaps the old global UNIQUE(name) for UNIQUE(user_id, name).
Web routes already keyed on id; templates only used name for display.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Bundles four reference script overlays (cedapug_maps, l4d2center_maps,
competitive_rework, tickrate) and adds a `flask seed-script-overlays`
CLI that upserts each *.sh as a system-wide overlay. Test deploy
invokes it after the orphan-cleanup migration so fresh test servers
come up with the same overlays the user has been maintaining by hand.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Reset stops the systemd service, unmounts the overlay, and rm -rf's both
runtime/<name> and instances/<name>, but keeps the Server row, blueprint,
and (shared) systemd template. Next Start re-initializes from the current
blueprint, so users can clean up logs/caches/accumulated game state without
losing the server.
Implementation factors a shared _purge_instance helper out of
delete_instance; reset_instance reuses it without the existence guard. New
"reset" lifecycle op flows through the same route + worker + facade plumbing
as the other server ops.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The delete job ran l4d2ctl delete (host-side cleanup) but never removed the
Server row, so deleted servers kept appearing on /servers. Hard-delete the
row in the worker's success path and skip the post-op status refresh, since
the systemd unit is gone.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Saving a script overlay or adding/removing workshop items now redirects to the
enqueued build job's detail page so logs are immediately visible. Added a new
/overlays/<id>/jobs page (linked as "all builds →" from the overlay detail
page) for browsing the full build history. Renamed the script "Save" button to
"Save and build" to make the side effect explicit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The route /admin/global-overlays/refresh was removed with the script-overlays
rewrite (migration 0005 dropped the global_overlay_* tables; the systemd
refresh units were deleted from deploy/). The admin-page form was left
behind and would 404 on submit. Drop the section and lock it out with an
assertion in the existing admin-pages test.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The web service unit has PrivateTmp=yes: its /tmp is a per-instance
namespace at /tmp/systemd-private-X-left4me-web.service-Y/tmp/ from
PID 1's perspective. When ScriptBuilder writes /tmp/tmpXXX.sh and
passes that path to the sandbox helper, systemd-run asks PID 1 to set
up BindReadOnlyPaths=${SCRIPT}:/script.sh — but PID 1 lives in the host
namespace and can't resolve the web service's PrivateTmp path. The
unit fails to start with status=226/NAMESPACE and "Failed to set up
mount namespacing: /script.sh: No such file or directory".
Move the tmpfile to ${LEFT4ME_ROOT}/sandbox-scripts/. /var/lib is not
affected by PrivateTmp (only /tmp and /var/tmp are), so PID 1 can
resolve the path. The web service has ReadWritePaths=/var/lib/left4me
already, and the directory is created on demand by Python.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
HTML <textarea> form submission encodes line breaks as CRLF per spec.
Storing those CRLFs unchanged means every line of the script reaches
bash with a trailing \r, which bash treats as part of the argument —
turning "ls /" into "ls /\r" and failing. Normalize CRLF/CR → LF in the
/overlays/{id}/script handler so storage and the sandbox tmpfile are
LF-only.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
NamedTemporaryFile creates the script file at mode 0600 owned by the
left4me web user. The sandbox runs as l4d2-sandbox and bwrap bind-mounts
the file read-only at /script.sh, but the kernel still enforces the
underlying file's permissions — l4d2-sandbox can't read 0600 left4me
files, so /bin/bash /script.sh fails with "Permission denied".
Script content is not a secret (it's stored in the DB and editable by
the user), so 0644 is appropriate.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds the script type to the create-overlay modal (with an admin-only
system-wide checkbox) and a script-section to the detail page: textarea
for the bash body, Save / Rebuild / Wipe buttons, last_build_status
badge, latest-build-job link, and a Wipe confirm modal. Removes the
GlobalOverlaySource block.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds POST /overlays/{id}/script, /wipe, /build under the overlay blueprint.
Generalizes /build to handle any owner/admin-editable overlay (deletes the
duplicate workshop-specific manual_build). Wipe runs the literal script
"find /overlay -mindepth 1 -delete" through run_sandboxed_script and
refuses with 409 while a build_overlay job is running. Adds an
admin-only system_wide=1 flag to POST /overlays for system-wide creation.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
GLOBAL_OPERATIONS becomes {"install", "refresh_workshop_items"}.
Removes refresh_global_overlays_running from SchedulerState and the
_run_refresh_global_overlays dispatch. Drops dead test cases and pins
GLOBAL_OPERATIONS contents.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Deletes the global_map_sources, global_overlay_refresh, global_map_cache,
and global_overlays service modules and their tests. Removes the
refresh-global-overlays CLI command, the /admin/global-overlays/refresh
route, and the GlobalOverlaySource view in overlay_detail rendering.
Drops py7zr from dependencies — was only used by the deleted subsystem.
The job_worker scheduler still tracks refresh_global_overlays; that
cleanup is Task 4. Deploy/README references are Task 8.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds ScriptBuilder that runs user-authored bash inside the
left4me-script-sandbox helper via run_command, with a 20 GB post-build
disk cap. Registry now {"workshop", "script"}.
finish_job writes Overlay.last_build_status on build_overlay completion.
Drops GlobalMapOverlayBuilder and the now-unreachable
_check_global_overlay_caches in l4d2_facade.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
stream_command used a blocking proc.stdout.readline() that never woke
when the underlying journalctl was silent, so Flask never delivered
GeneratorExit on client disconnect — the worker thread and the journalctl
child both leaked permanently and pinned the gunicorn thread pool.
Switch to a select-based read loop with a 15s heartbeat tick (yielded as
""), and translate the tick to an SSE keepalive comment in the log route.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The workshop + managed-global overlay surface fully covers the
admin-SFTP flow that 'external' was a placeholder for. Drop the type
from the model defaults, builder registry, routes, template, and
tests, and add migration 0004 that deletes any leftover external
rows along with their blueprint and job references.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds two managed system overlays (l4d2center-maps, cedapug-maps) that
fetch curated map archives from upstream sources and reconcile addons
symlinks for non-Steam maps. A daily systemd timer enqueues a coalesced
refresh_global_overlays worker job; downloads, extraction, and rebuilds
run in the existing job worker and surface in the job log UI.
Schema: GlobalOverlaySource / GlobalOverlayItem / GlobalOverlayItemFile
plus nullable Job.user_id so system jobs render as "system" in the UI.
The new builder reconciles symlinks against the per-source vpk cache
and leaves foreign symlinks untouched. Initialize-time guard refuses
to mount a partial overlay if any expected vpk is missing from cache.
Refresh service uses shutil.move to handle EXDEV when /tmp and the
cache live on different filesystems.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Limit workshop refresh downloads to one worker and commit build-overlay enqueue work before writing the final job log so SQLite locks do not wedge the web process.
Before invoking l4d2ctl initialize, run each blueprint overlay's builder
synchronously and then verify that every workshop item attached to the
blueprint has a cache file on disk. If any are missing, raise a clear
error naming the overlay and the missing steam_ids — server start can't
silently mount a partial overlay where some maps are mysteriously absent
in-game.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds workshop_routes blueprint with add-items / remove-item / manual-
build endpoints plus admin /admin/workshop/refresh. Add-items handles
single ID, single URL, multi-line batch, or a collection ID; auto-
enqueues a coalesced build_overlay job per call. Reject non-L4D2 items
with 400, duplicate associations with friendly toast, intruders with
403.
Generalizes overlay_routes: type+name only on create (no path field);
external is admin-only and system-wide, workshop is per-user and
auto-pathed. Update is name-only. Delete recursively removes the
on-disk dir only for managed paths (path == str(id)); legacy externals
are left in place. The pre-existing in-use guard is preserved.
Page routes filter the overlay listing by user permissions and load
workshop items + the latest related job for the detail view.
Templates: unified Create modal with type radio (no path field).
Type-aware overlay detail: workshop overlays show a multi-line input
+ items/collection radio + item table partial with thumbnails, manual
Rebuild button, and a small status indicator pulled from the latest
related job. Admin page gets a "Refresh all workshop items" button.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Extends SchedulerState with running_overlays / refresh_running /
blocked_servers_by_overlay, and updates can_start with the truth table:
install and refresh_workshop_items are global mutexes; build_overlay
serializes per-overlay; server jobs block on builds for any overlay
their blueprint references.
Adds enqueue_build_overlay coalescing helper that returns an existing
queued job for the same overlay rather than inserting a duplicate.
Adds run_job dispatch for build_overlay (BUILDERS[overlay.type].build)
and refresh_workshop_items (re-fetches metadata, re-downloads on
time_updated/filename change, enqueues coalesced rebuilds for affected
overlays).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds l4d2web/services/overlay_builders.py with a BUILDERS dict mapping
Overlay.type to a builder class. ExternalBuilder is a no-op that just
ensures the overlay directory exists. WorkshopBuilder diff-applies
absolute symlinks under left4dead2/addons/ against the overlay's current
WorkshopItem associations: creates new ones, removes obsolete, leaves
unrelated files alone, and skips uncached items with a warning rather
than producing dangling symlinks.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds workshop_paths.cache_path(steam_id) returning
$LEFT4ME_ROOT/workshop_cache/{steam_id}.vpk with digit-only validation.
Adds overlay_creation.generate_overlay_path(id) and
create_overlay_directory(overlay) with exist_ok=False so a stray dir from a
prior failed delete surfaces loudly instead of shadowing fresh content.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds l4d2web/services/steam_workshop.py: parse_workshop_input (single ID,
URL, or multi-line batch), resolve_collection (HTTPS POST to
GetCollectionDetails), fetch_metadata_batch (HTTPS POST to
GetPublishedFileDetails with consumer_app_id == 550 enforcement that
raises WorkshopValidationError in add-mode and silently skips in
refresh-mode), download_to_cache (atomic + idempotent on mtime+size),
and refresh_all (ThreadPoolExecutor with per-item error collection).
Adds requests as an explicit dependency.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds Overlay.type and Overlay.user_id with two partial unique indexes
(externals globally unique by name; user overlays unique per user).
Adds WorkshopItem registry keyed on steam_id and a pure many-to-many
overlay_workshop_items association. Adds Job.overlay_id for build_overlay
job tracking. Switches overlays.id to AUTOINCREMENT so deleted IDs are
never reused.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Per-row "Create server" link on /blueprints navigates to
/servers?blueprint_id=<id>; that page validates the param against
the user's owned blueprints, pre-selects the option, and auto-opens
the create modal.
- /servers empty-blueprint state now shows an actionable
"Create a blueprint first ->" link (styled like the primary button)
pointing at /blueprints, replacing the silent disabled "+ Create"
button + muted hint.
- Drop the "Reassign blueprint" form on the server detail page
along with the unused POST /servers/<id> form route. The JSON
PATCH /servers/<id> endpoint is retained.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Native <dialog> modal infra (CSS + ~30 LOC JS, no framework) used for
create forms and delete confirmations.
- Index pages become listing-only: + Create button opens a modal; the
broken blueprint Actions column and inline overlay edit cells are gone.
- Server detail gains a blueprint reassignment form; existing Delete
button now opens a confirmation modal before tearing down the runtime.
- Blueprint detail gains a Delete button + confirmation modal (was
unreachable from the UI before).
- New overlay detail page at /overlays/<id> with edit form, "Used by"
blueprints list, and delete (admin only).
- Server create: port field is now optional; backend auto-assigns the
next free port from LEFT4ME_PORT_RANGE_START/_END (default
27015-27115). 409 on range exhaustion.
- New routes: POST /blueprints/<id>/delete (form sentinel matching
overlays pattern), POST /servers/<id> (form-friendly blueprint
reassign), GET /overlays/<id>.
- Server delete operation now redirects to /servers; overlay update
redirects to /overlays/<id>.
Server rename remains unsupported pending an id-vs-name design pass for
l4d2host (the runtime directory is name-keyed; renaming would orphan
files).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The HTTP-only test deployment binds gunicorn to 0.0.0.0:8000 with no TLS
terminator, so a hardcoded SESSION_COOKIE_SECURE=True breaks browser
login. Make it opt-out via env (default True outside TESTING) and set
SESSION_COOKIE_SECURE=false in the generated web.env so the test box
keeps working over HTTP.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- validate instance names at the host lib and web boundary against
[a-z0-9][a-z0-9_-]{0,63} to prevent path traversal via Server.name
- fail-closed on SECRET_KEY: load_config returns None when env unset,
create_app raises if missing or "dev" outside TESTING
- close login timing oracle by hashing a dummy digest when the user
is not found, equalizing response time
- set SESSION_COOKIE_SECURE outside TESTING
- delete_instance tolerates stop_service and fusermount3 failures so
partially-initialized instances clean up without contract breaks;
drops the is_mount() preflight that violated AGENTS.md
- document claim_next_job's single-process assumption
- clarify emit_step contract via docstring
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
