* Center newly opened tabs at end, keep close controls visible
- Add end padding to tab strip to preserve close button visibility against fade
- Center scroll position for newly revealed end tabs, avoiding hard scroll-to-end
- Only pin-to-end for new tabs that are also active; restored mid-strip tabs stay in place
* test(tab-scroll): clarify when tabs center vs settle at end
Add lastTabGeometry helper to correctly derive scrollWidth from the pad policy. Update test expectations to document that center requests only land centered when the strip is within 2x the inset of the last tab's width; wider gaps settle at the end with inset.
* fix(tab-bar): sync active tab id ref after render
React Doctor rejects mutating refs during render. Keep the latest
active tab id in a layout effect so overflow navigation still sees
it without an impure render write.
The fingerprint gate added in #14207 reads Git's administrative layout directly -- `.git` as a file or directory, `commondir`, and per-worktree `HEAD`, `gitdir`, and `locked` -- instead of shelling out to `git worktree list`. That makes it depend on Windows path resolution, CRLF inside those files, and whether `worktree move`/`lock` and deleting a live checkout behave as they do on POSIX.
PR CI runs the vitest suite on ubuntu-latest only, so none of that was exercised. Both suites were verified by hand on a real Windows host (Git 2.55.0.windows.3, Node 24.18.0) and pass 25/25, but nothing kept them passing.
Add them to the existing curated `Test Windows-specific boundaries` step rather than standing up a new job: the `package (windows)` job already checks out and installs dependencies, so this costs only the tests themselves.
* test(terminal): pin the seven wrapper security properties that survived mutation
The PowerShell drive-relative pin was a prefix that also matched the insecure regex, so re-accepting C:foo left the suite green. Now asserts the full pattern.
Also pins all four PowerShell TrimEnd sites, the fallback wrapper-dir skip, the cmd legacy-dir trailing-separator strip, and C:/-style drive acceptance, plus a behavioural test for the POSIX legacy-dir reject with a distinct ORCA_ATTRIBUTION_SHIM_DIR. Each verified by reverting the property and confirming the suite fails.
* test(terminal): cover the trailing-separator scrub in the path matcher
isLegacyTerminalShimPathEntry sits outside the two generator modules, so the mutation campaign never re-ran it. Dropping its trailing-separator strip survived the suite: a PATH entry spelled with one would not match, leaving the legacy shim directory on the spawned PATH and the wrapper reachable. Mutation-verified on both the POSIX and Windows spellings.
* perf(worktrees): bound the duplicate-id scan in reuseEqualCatalogRows
Rows sharing an id are scanned linearly with a deep compare each, so a bucket
of k duplicates costs O(k^2). Both callers key on ids that are unique by
construction, so this is a bound on damage rather than a live fix.
Cap the scan instead of adding a second index: reuse is only an optimization,
so a missed match yields a new object identity, never a wrong row. A fingerprint
index would buy a little more reuse in a case nothing reaches, at the cost of a
second equality implementation that must stay in step with catalogValuesEqual
with no automated guard.
Worst-case duplicate bucket, no matches: k=1000 134ms -> 1.2ms, k=2000 541ms ->
2.2ms. Unique-id path unchanged (2000 rows: 0.86ms both).
* docs(worktrees): lead the duplicate-id cap comment with its reachability
A reader hitting MAX_DUPLICATE_ID_SCAN should learn first that no caller
produces duplicate ids today, so the cap reads as bounding future damage rather
than fixing something live.
* fix(terminal): clear CDPATH when resolving the wrapper directory
cd consults CDPATH for a relative operand and echoes where it landed, which the command substitution captured — wrapper_dir came out wrong, the lookup resolved to the tombstone itself, and git died at 127 with a working git on PATH.
Also pins the self-reference guard that turns that failure into a clean 127 rather than repeated self-exec; deleting it previously left the suite green. Both new tests are mutation-verified: an earlier version of each passed with the bug reintroduced because the CDPATH fixture mirrored only the first path segment.
* test(terminal): pin the wrapper guards that survived mutation
A mutation campaign found several security properties with no coverage. Most important: nothing asserted the Windows *reject* path for relative candidates, so deleting it reopened the cwd hijack while every accept-path assertion stayed green.
Also pins the separator variable value (any other character silently un-pins the trailing-separator fix), and grounds the interpreter-search test in the running process cwd — a relative PATH entry resolves against that, so the previous fixture in a tmpdir passed whether or not the guard existed. Each is mutation-verified.
The resolver could never succeed on Windows — no absolute candidate exists there and the PATH search split on the POSIX delimiter — so it always fell back to the ambient lookup it exists to avoid, on a wrapper Git Bash and WSL panes do execute.
Also rejects interpreter candidates containing whitespace (a shebang cannot quote) or that are directories (X_OK alone is true for those), and replaces the sentinel trailing-separator strip, which corrupted paths containing the sentinel, with a comparison against a variable holding the separator.
* Reapply #13326 and #13928 (un-revert #14361)
Restores the SSH reattach-identity and daemon-occupancy fixes. Reverting them
reintroduced their P0s, filed as STA-4224, STA-4225, STA-4227, STA-4230,
STA-4232, STA-4233 and STA-4234 against #14361.
The tab loss that motivated the revert is fixed in the commits that follow, so
this reapplication is not a straight redo.
* fix(relay): stop the fallback attach fence refusing a pane that moved tabs
The primary fence was moved to the shell's own incarnation precisely because
paneKey/tabId froze the pane's LOCATION at spawn and refused panes that had
merely moved. The fallback that older clients fall into kept the old rule, so
the correction never reached it — the same 'the rule exists, but this path does
not ask it' leak this work has hit repeatedly.
A refusal here is not recoverable: an identity mismatch never grounds a respawn,
so the pane keeps a live shell it can no longer reach and renders blank.
Narrowed to paneKey, which is the identity; the tab is a location. Restoring the
tabId comparison reddens the new test.
* fix(terminal): bake the wrapper interpreter and emit CRLF for cmd
Round-3 review: the shebang resolved bash through the inherited PATH before any script hygiene, so a relative or empty PATH element let an untrusted checkout supply the interpreter. Bakes an absolute verified interpreter with an env fallback.
Normalizes trailing separators in the cmd comparisons; without it a wrapper-dir entry spelled with a trailing backslash escaped self-exclusion and the wrapper tail-chained to itself forever.
Found while verifying on Windows: cmd resolves call targets by byte offset and fails on LF-only files once they grow (worked at 2.4 KB, failed at 3.7 KB), so the Windows wrappers now emit CRLF. Also avoids two cmd parser traps: a trailing backslash before a closing quote in an if comparison, and percent expansion inside rem comments.
* fix(terminal): resolve the wrapper interpreter from absolute PATH entries too (STA-4226)
The well-known-candidate list would fall back to an ambient env lookup on distributions that place bash elsewhere (NixOS, Guix), restoring the exposure. Search absolute PATH entries before giving up, skipping relative and empty ones because those mean the current directory.
* feat(dashboard): filter the agent map by multiple hosts
The map's host control was a single-choice segmented row in its own header:
pick All, Local, SSH, WSL, or Remote — never two at once. It also sat outside
the shared filter menu, so the menu's badge never counted it and "Clear all
filters" could not reach it.
Hosts are now checkboxes in the filter menu alongside agent state, so a fleet
split across a Mac and a Windows runtime can show both and hide the rest.
Hosts that contribute no agents are omitted, and the section hides entirely
for a single-host fleet.
Lifting `hostFilter` out of AgentMap also drops `compact`, which existed only
to hide the segmented control next to an open terminal panel.
The filter-option builders move to agent-dashboard-filter-options.ts to keep
AgentDashboardToolbar under the 400-line cap; that move is mechanical.
* feat(dashboard): give the agent map a real filter panel
The map's filters were a single-choice host row in its own header plus a few
rows borrowed from the board's dropdown. This replaces them with one panel that
owns every map facet.
- Quick views: Everything / Needs me / Stuck / Unread / Last 30 min /
Long runners / Stale > 3d / Orchestration. Each replaces the filters
wholesale rather than stacking on whatever was set.
- Provider (agent type) checkboxes.
- Three time ranges — session lifespan, since last message, time in current
state — on a non-linear scale so minutes and days are both reachable.
- Orchestration flows select the coordinator *and* the agents it dispatched;
a children-only filter hid the half that explains the flow.
- Sections collapse, each showing its value when closed. A section that is
filtering forces itself open so a collapsed row can never be the reason the
map looks emptier than the filters claim.
- The shown-count moves into the panel header, next to the controls that
change it, and now reflects the map's own facets rather than the board's.
The map's surface becomes a Popover, not a DropdownMenu: the panel holds range
sliders and a Radix menu swallows the arrow keys those need. The board keeps
its dropdown untouched via a new `filterControl` slot on the shared toolbar.
`ui/slider` renders one thumb per value so a two-value range works; the two
existing single-value callers are unchanged.
* fix(dashboard): preserve agent map filter semantics
* refine agent map filter facets
* perf(dashboard): keep map filters out of main view
* fix(macos): recover severed terminal TCC attribution after updates
When a packaged update leaves the daemon healthy but TCC-severed (spawning
binary gone), surface a Manage Sessions toast and replace the daemon before a
new terminal only when zero live sessions remain. Does not broaden FDA or
auto-kill sessions. Addresses the Orca-specific path of #13594.
* fix(macos): coalesce severed-TCC toast checks and sync i18n keys
Add catalog entries for the Manage Sessions toast strings and guard overlapping
mount/focus probes with an in-flight latch so only one infinite toast can fire.
* test(macos): harden severed TCC recovery coverage
* fix(macos): clear recovered TCC warning
* fix(macos): clarify severed TCC warning copy
* fix(macos): bound TCC attribution health checks
* fix(macos): preserve bounded attribution checks after merge
* test(macos): use real execFile callback contract
* fix(macos): cover legacy daemon attribution
* fix(macos): clarify affected Orca terminals
---------
Co-authored-by: Brennan Benson <79079362+brennanb2025@users.noreply.github.com>
* fix(terminal): guard cmd wrapper PATH walks against an empty variable
An empty PATH or cleaned PATH left the substitution with an unbalanced quote, desynchronizing cmd parsing so the not-found branch emitted a parse error instead of its message. Reproduced and fixed on real Windows.
* fix(terminal): reject relative PATH entries and drop the dirname dependency
Adversarial review found the STA-4169 fix incomplete: it dropped empty PATH elements but kept relative ones, which resolve against the current directory identically. A repo-local git was still executed via PATH=. or node_modules/.bin, reproduced in all three wrappers.
Also removes the external dirname call in the POSIX wrapper (an unresolvable dirname silently made wrapper_dir the cwd, so the wrapper failed to exclude itself and reported git missing while git was on PATH), compares against the cached wrapper dir in the cmd subroutine where %~dp0 is rebound by CALL, and probes .cmd after .exe so a non-.exe git is still found.
* fix(terminal): test rooted paths in pure batch, not via an external tool
The rooted-path guard shelled out to findstr, which cmd resolves from the current directory first — so a repository-local findstr could run, and a malicious one could report success for every entry and defeat the guard entirely. Same hijack the guard exists to prevent. Now a pure-batch substring test with no external process.
Splits the Windows wrapper templates into their own module to stay under max-lines without a suppression.
* fix(terminal): reject drive-relative PATH entries and fix no-slash wrapper dir
Round-2 review: PowerShell IsPathRooted accepts drive-relative C:foo, which still resolves against the current directory on that drive. IsPathFullyQualified is absent on Windows PowerShell 5.1 (verified 5.1 on the test host), so match the same prefixes the cmd wrapper accepts.
The POSIX %/* strip yields the file name when the path has no slash, so wrapper_dir became the name, self-exclusion missed the shim dir, and the lookup resolved back to the wrapper (spurious 127). Handled with a case split.
Also probes .bat, since the replaced lookup honored PATHEXT.
* fix(terminal): make the bold font weight its own setting
Deriving bold as max(700, regular + 200) silently destroyed bold. A family
exposes only a few real faces: the monospace the default chain resolves to on
macOS has exactly two, splitting at 600. Measured by rasterizing each weight to
a canvas — 100-500 are byte-identical (ink 3023) and 600-900 are byte-identical
(ink 3855), at every weight the same advance. So any base weight at or above 600
put both values in the same face and bold stopped existing, on 4 of the 9
positions the slider offers, with no error and nothing the user could do.
Arithmetic cannot fix it — on a two-face family there is no heavier face to
escape to. So bold is now user-owned: a new terminalFontWeightBold setting with
its own control, defaulting to 700. The default pair (500/700) straddles the
boundary, so existing profiles render exactly as before; a collision is now a
choice the user can see and undo.
The old test asserted 800 -> {800, 900} as 'keeps bold heavier', which is where
this hid: numerically heavier, identically rendered.
* fix(terminal): surface bold face collisions accurately
Derive initial dependency readiness inside the task INSERT so concurrent completion and creation cannot strand a task in pending.
Add deterministic state-machine coverage and a built-CLI RPC/runtime persistence E2E.
Fixes#14143
The retained git/gh compatibility wrappers resolved their real binary with an unqualified lookup. On Windows that searches the current directory before PATH, so a repository-local git.exe/gh.exe ran with the user's arguments. The POSIX wrapper had the same exposure through empty PATH elements, which mean the current directory.
All three wrappers now resolve only against the cleaned PATH: cmd and PowerShell walk it explicitly instead of delegating to a lookup that includes the cwd, and the POSIX filter drops empty elements. Candidates inside the wrapper directory stay rejected.
* Revert "fix(daemon): stop killing live coding agents when the daemon can't report its sessions (#13928)"
This reverts commit 2e8cf589de.
Reverted together with #13326: the 1.4.182-daily.202608131439 build carrying
both loses every tab on an SSH disconnect/reconnect cycle. Reverting first so
main stays releasable and the P0 fixes in the wild remain cherry-pickable,
rather than fixing forward on a shipped regression.
* Revert "fix(ssh): stop SSH reconnect from multiplying terminals and resuming agents twice (STA-3077)" (#13326)
This reverts commit 3ab8b6a117.
Reported on 1.4.182-daily.202608131439: connect to an SSH worktree, disconnect
the host from the hosts popup, reconnect — every tab is gone. That is worse than
the behaviour this PR set out to fix, where most tabs were retained.
Reverting rather than fixing forward, so main stays releasable and the P0 fixes
already out in the wild stay cherry-pickable. STA-3077 stays open.
PR #14193 routed warm reattach and deep-buffer snapshots through
overlayDurableRestoreSnapshot, which joined a single process-wide
checkpoint tail with no deadline. One never-settling checkpoint blocked
every daemon-backed terminal from reattaching.
Checkpoint exclusivity only protects one session directory's
tmp-write/rename pair, so serialize per session instead. Reattach now
waits on a bounded deadline and degrades to the daemon's live window;
the abandoned compact keeps running and still commits, so a blown
deadline costs restore depth for one reattach, never durable history.
* fix(browser): fence the cookie-clear fallback to the pre-clear snapshot (STA-4170)
The post-rejection fallback re-read the live cookie jar and removed everything
removable at that moment, while restore only ever covered the pre-clear
identity snapshot. A cookie that arrived mid-clear -- a login the user had just
completed -- was therefore deleted with no identity able to put it back, and a
later removal failure still reported "existing cookies were restored".
Fix the removal plan at the same point as the identity snapshot so the mutated
set can never exceed the restore set. Arrivals are not touched at all, which
matches what the successful bulk-clear path already does.
* test(browser): lock same-coordinate arrival rollback to the pre-clear value (STA-4170)
* fix(ai-vault): make the merged scan stamp independent of leg order
The all-host merge picked its stamp with a strict `stampMs > latestMs` and
echoed the winning leg's verbatim string. Two legs reporting the same instant
in different legal ISO shapes ("...:05Z" vs "...:05.000Z") therefore resolved
by position in the results array, i.e. by host-enumeration order (local, then
SSH, then runtime). The prior lexicographic max was order-independent, so this
was a regression with no test covering it.
A merge has no single scan instant, so its stamp is derived data rather than
any one leg's string: return the canonical ISO form of the newest accepted
instant. That is order-independent and format-independent, and drops a
variable instead of adding a tie-break branch.
Also share one request resolver between main and the renderer so the
renderer's merged-scope predicate is equivalent to main's routing by
construction, rather than by a comment that overclaimed it.
* docs(ai-vault): scope the merged-predicate comment to the desktop IPC path
The replacement comment still asserted the result is always several hosts'
legs. The paired web transport drops executionHostScope and serves one host,
so 'all' there is a single scan. State that the predicate is deliberately
over-inclusive and why erring the other way would be unsafe.
* test(ai-vault): pin the merged-stamp Date range boundary
new Date(ms).toISOString() throws RangeError outside +/-8.64e15. That is
unreachable only because Date.parse applies TimeClip, so the NaN guard alone
constrains the argument. Nothing pinned that. Dropping the guard now fails
these two cases with the RangeError they exist to prevent.
* refactor(ai-vault): route session-title scope through the shared resolver
The last character-for-character copy of the request-scope default. Leaving
it would make the shared resolver the single source of truth for two of three
sites, which is the drift this change exists to remove. No behavior change.
The Non-Orca worktrees modal already lists every hidden external worktree
with search, virtualization, and per-row Show. Its filter is a strict
superset of the sidebar inbox's, so the expanded sidebar list was a second,
worse copy that grew to ~900px at 24 worktrees.
The inbox is now a single clickable card stating the count, which opens that
modal. Drops the expand state, nested list, per-row Import, and the
Keep hidden / Import all footer.
Honor the advertised reasoning-effort ceilings for Codex models, preserve conservative unknown-model handling, and localize the new ultra effort label.
* feat(dashboard): give the agent question state its own color and glyph
On the agent map, 'working' (yellow-500) and 'waiting' (amber-500) sat 16 hue
degrees apart and rendered as identical halo rings, so the only cue separating
"busy, leave it alone" from "it is asking you something" was a hue step most
people cannot resolve at map zoom. Every other surface distinguishes the two by
shape (spinner vs question glyph); the map had dropped that.
Move 'waiting' to orange-500 — midway between working-yellow and blocked-red —
and give the map node the same question glyph the sidebar and tabs already use,
so the state reads by shape when hue fails (low zoom, red-green CVD).
Both live behind one token, --agent-question, plus a shared AgentQuestionIcon,
so the sidebar, terminal tabs, kanban, toolbar and map cannot drift apart again.
The unread amber pip is deliberately left alone: "new output" and "needs an
answer" are different states and now read as different colors.
* test(dashboard): retarget the agent-row question assertion at the shared token
DashboardAgentRow renders the glyph through AgentStateDot, so the component
already moved with the token — only its assertion still pinned text-amber-500.
Missed locally because I ran components/dashboard-popout but not
components/dashboard.
* fix(dashboard): raise light question marker contrast
* perf(dashboard): keep question badges on the SVG paint path
* fix(terminal): clear the SGR pen on hidden-output restore and abandon
The hidden-delivery gate drops renderer-bound PTY bytes while a pane has no
visible view. The renderer's xterm is a separate emulator from the daemon
model, so when the dropped span contains the sequence closing an attribute run
(e.g. the ESC[22m ending a bold run) the renderer's pen stays latched while the
daemon model stays correct. Neither recovery path cleared it:
- buildMainModelSnapshotReplayWrites reset the pen on the two alt-screen
branches but not on the normal-buffer branch, and replayed scrollbackAnsi
ahead of the reset it did emit, so replayed content inherited the stale pen.
- abandonHiddenOutputRestoreAndDrainPendingForeground declares the dropped
bytes unrecoverable (it writes a user-visible warning) and then drained the
queued foreground chunks straight into xterm under that same unknown pen.
Add RESET_GRAPHIC_RENDITION and emit it ahead of replayed content in every
branch, and on both abandon exits. The existing profiles all clear DEC mode
bits and none touched SGR.
* fix(terminal): also restore charset designation after a dropped-byte gap
A gap can strand more than the pen: a dropped `ESC(B` leaves line-drawing
selected and ordinary text renders as box characters. Route both recovery
paths through one RESET_AFTER_BYTE_GAP profile covering SGR + charset.
Deliberately not a soft reset (DECSTR): xterm's DECSTR wipes kitty flags and
stacks (terminal-kitty-keyboard-mode-tracker applySoftReset), which would
silence Option chords for a live agent that negotiates them only at startup.
Reset what a gap strands and no running TUI re-asserts on its own; leave the
rest to its next repaint.
* fix(terminal): close the emulator state gap where the drop is announced
The restore-needed marker is the single point where "renderer-bound bytes
were dropped" is known. The handler already resets the transport's
cross-chunk parser state there for exactly this reason — a partial escape
spanning the gap would corrupt the next chunk. The emulator carries state
across chunks in the same way, so reset it in the same place.
That makes restore, abandon and overflow all start from a known pen by
construction, instead of each recovery path having to remember.
* fix(terminal): fully ground byte-gap recovery state
* fix(terminal): reset state when remote restore re-arms
* fix(terminal): keep the gap reset on the warning abandon path
The reset had been folded into an else of the unavailable-warning branch, so
the primary abandon path relied on the marker's earlier reset still standing.
It does not always: this function captures a replayingSnapshot, so it can run
after a partially-applied replay has already moved the pen, and the warning
itself is plain text carrying no SGR. Restore the unconditional write, guarded
only against the remote re-arm which writes its own.
* fix(terminal): scope the byte-gap reset to the pen and skip it under flood
Two regression risks in the widened recovery reset, both removed:
- The profile had grown to cancel partial escapes, close OSC 8 and re-designate
all four ISO 2022 registers. Each changes what a live TUI sees on a path that
runs in production, and none has a reported symptom behind it — a legitimately
line-drawing TUI that does not re-designate after recovery would render box
characters as ASCII. Scope back to SGR, which is what the field reports show.
- The marker-time reset ran before the flood-backpressure guard, so a flood
wrote one reset per marker in exactly the case that guard exists to damp. Move
it after; the flood path repaints through buildMainModelSnapshotReplayWrites,
which grounds the pen itself, so no coverage is lost.
Coverage verified non-vacuous: blanking RESET_AFTER_BYTE_GAP fails 5 tests
across all four paths (replay branches, marker, abandon-with-warning, remote
re-arm).
* fix(dashboard): hold agent map orchestration chevrons at a fixed pitch
CHEVRON_SPACING only chose how many chevrons to draw; placement then divided
the edge evenly, so the pitch grew with the distance between agents and, past
the 32-chevron cap, grew without bound. Step at a literal 8px pitch instead,
centering the run so it never overhangs either node.
Fixed pitch makes length drive the chevron count, so cap coverage now decides
how far the run reaches: at 32 it spanned only 248px and every longer link
would have shown a chevron cluster stranded mid-edge. Raise it to 256 (~2048px,
past any real in-project link) and memoize the generated path per endpoint
coordinates, since the scene rebuilds every path string on each zoom frame and
on 4Hz snapshot refreshes while world positions stay put.
* test(agent-map): isolate lineage path cache coverage
* feat(agent-map): make an unread finish visible and let a glance demote it
A finished agent was the quietest mark on the map. `status-glow` was defined
only for working/waiting/blocked, so a finish got a 1.7px emerald stroke on a
6px mark and no halo — invisible across a 200-agent fleet.
Worse, `dashboardCardDisplayState` folds `done && !unseen` into `idle`, so
opening an agent erased it: finished-but-unlanded work looked exactly like a
workspace that never ran. Looking at something is not the same as dealing
with it.
Split the two on the map only, via a local `AgentMapNodeStatus` at the single
`agentMapNodeStatus` seam. `DashboardCardDotState` crosses the pop-out bridge
and is unchanged, so there is no wire change and bucket counts are untouched.
- done + unseen: filled emerald core, emerald halo, one-shot 1.4s flare
- done + seen: hollow emerald, no halo — still yours to land
- workspace ring turns green only once the whole workspace has settled
The flare is gated on a wall-clock recency window, not the map's `now` prop:
`now` ticks every 30s to refresh relative timestamps, so measuring a 1.4s
window against it fired at random moments instead of on the transition.
* fix(agent-map): bound completion paint work
* perf(agent-map): avoid fleet flare allocation
* fix(agent-map): localize seen completion label
* Remove unrelated merge formatting changes
* test(agent-map): guard completion burst paint budget
* refactor(palette): move worktree labels to right badge rail with tooltip
Move worktree and branch names from the tab title line to a dedicated right-side badge rail, preventing long titles from being truncated. Add smart tooltips showing full names when truncated, and distinguish between workspace names and branch names based on whether they're auto-generated labels.
* fix(palette): disconnect worktree rail ResizeObserver on unmount
Move truncation observation into a layout effect so React Doctor sees a cleanup path and the subscription cannot leak after unmount.
* test(e2e): add golden tests for fresh terminal and shell commands
Adds regression tests for terminal initialization in fresh profiles and shell command execution to the golden test suite, integrated across Linux, macOS, and Windows CI.
* test(e2e): bracket shell command output between markers
The echoed command can wrap or be clipped by the buffer tail. Bracket output between begin and end markers to reliably identify real output, and strip ANSI escape sequences that interfere with parsing.