Rewrite a -> b to (not a) or b in NNF so a pending temporal antecedent
can no longer defer the whole implication and drop a consequent that was
false at the current step. Carry a pending inner past a bounded-Always
window close instead of dropping it to holds, so a deferred obligation is
resolved by a later step or Finalize.
Apply nnf on construction, reduce bounded Always symmetric to bounded
Eventually (vacuous holds once the window closes), add Finalize to
resolve undischarged liveness obligations to Violated at run end, and
collapse structurally-identical pending obligations.
Add StepBound/Duration/Deadline to AlwaysFormula as the dual of bounded
Eventually, give ThunkFormula a Name for stable identity, add ThunkNamed,
and surface both in describe() and MarshalJSON.
* feat(trace): extend Step/Action/Meta schema for inspect UI
Add Step.Hierarchy, Step.Residuals, Action.Selector/ResolvedBounds/TapPoint,
Meta.EndedAt and JSON tags on hierarchy.Element/Bounds/Tree so trace.jsonl
can drive the upcoming uatu inspect web UI.
* test(trace): cover EndedAt + new step fields round-trip
* feat(ltl): MarshalJSON for Formula AST + Evaluator.Residual()
Each Formula concrete type now serializes to a closed-set residual node
(true/false/not/and/or/implies/always/now/next/eventually/predicate/error)
that mirrors the TS spec API surface. Evaluator.Residual() folds pending
obligations into a single Formula so the runner can stamp one residual
per property per step into trace.jsonl.
* feat(runner): stamp residuals, hierarchy, selector targets, ended_at
Each Step now carries the captured hierarchy, per-property residual ASTs,
and (for Tap/InputText) the selector + resolved bounds + tap point. The
test_run command writes meta.ended_at on graceful shutdown so the inspect
UI can distinguish completed runs from in-progress ones.
* feat(inspect): scaffold embed dist for SPA assets
Stage 2 stub for the inspect server. Real web bundle gets wired in
Stage 4 (Makefile copies web/dist into internal/inspect/dist).
* chore(web): ignore web/ build output in root .gitignore
* chore(web): add bun + vite + vitest scaffold config
* feat(web): monochrome design tokens, typography, app shell CSS
* chore(web): placeholder for self-hosted JetBrains Mono fonts
* feat(web): index.html entry with style links and root mount
* feat(web): typescript types mirroring run/step trace schema
* feat(web): typed fetchers for runs/steps/screenshots
* feat(web): App shell with router and run/step routes
* feat(inspect): runs scan, lazy step parse, mtime-aware cache
* feat(web): RunList route with table, loading, and error states
* feat(web): RunDetail route shell with three placeholder panels
* feat(inspect): fsnotify-backed runs watcher with debounce
* fix(web): use jest-dom/vitest entry so matchers register
* test(web): cover listRuns happy path and error response
* test(web): render RunList with mocked fetch and assert row
* chore(web): commit bun lockfile
* feat(inspect): http handlers for runs/steps/screenshots/SSE
* test(inspect): cover handlers, screenshot whitelist, SSE, dev proxy
* feat(cmd): add 'uatu inspect' subcommand
* fix(web): align TS types with snake_case wire format
Go inspect server serializes RunSummary, StepSummary, Step, Meta with
snake_case JSON tags (matching the on-disk trace.jsonl/meta.json). Update
the TS types and consumers to match so API responses parse without
runtime undefined fields. Action keeps resolvedBounds/tapPoint as camelCase
because those keys were defined that way in the trace schema.
* feat(web): add ActionList panel for run-detail step navigation
* feat(web): add SnapshotTable panel with diff highlighting
Renders snapshots dictionary as a flat sorted dotted-path tree.
Changed leaves get data-changed plus a hover title with the previous value.
* test(web): cover SnapshotTable rendering and diff behavior
Eight cases: empty state, sort order, dotted-path expansion,
changed/unchanged/missing-previous flagging, and inline-vs-expanded arrays.
* feat(web): add Screenshot panel with bounds and tap overlays
Center column of run-detail page. Renders the device screenshot
scaled to fit, with an SVG overlay drawing resolvedBounds as a
violation-colored rect, tapPoint as a contrast ring, and swipes
as an arrow. Falls back to a placeholder when src is missing or
the image fails to load.
* fix(web): guard scrollIntoView call for jsdom compatibility
* test(web): cover Screenshot panel rendering and overlays
* test(web): cover ActionList rendering, selection, keyboard, and markers
* feat(web): add ExceptionsPanel component
* test(web): add ExceptionsPanel tests
* feat(web): add Timeline panel with property swimlanes
Renders SVG swimlanes per property with violated/pending/holds cells,
action-marker dots, click-to-seek, and a selected-step highlight bar.
* test(web): cover Timeline empty state, cells, status, click, highlight
* feat(web): add ResidualNode recursive AST renderer
* test(web): cover ResidualNode operators, predicate, and error chip
* feat(web): add ViolationsPanel with status badges and jump button
* test(web): cover ViolationsPanel rows, status grouping, and jump button
* test(web): register testing-library cleanup globally
All six panel test files added local afterEach(cleanup); centralize it in
the shared setup so future tests inherit DOM isolation by default.
* feat(web): hooks for url/keyboard/theme/sse
* feat(web): wire all panels into run-detail with phone-dominant grid
ActionList left, Screenshot center, Snapshots/Properties/Exceptions
stacked right, Timeline bottom. URL-synced step index (useStep), keyboard
shortcuts (j/k/arrows/g/G/.), light+dark theme toggle stored in
localStorage, SSE auto-refresh on the run index.
* test(web): add three reference run fixtures (clean, violation, exception)
* build: web targets in Makefile + bun in CI; docs(inspect)
- Makefile: web-build/web-dev/inspect-dev/test-web targets; uatu and
install now depend on web-build so the binary embeds the latest SPA.
- ci.yml: setup-bun + cache; existing make test now runs web typecheck +
vitest as part of the full suite.
- docs/manual/inspect.md: panel reference, keyboard shortcuts, URLs.
- docs/manual/cli.md: document uatu inspect.
- README: link to inspect docs.
* feat(runner): capture a screenshot per step
The driver already exposes Screenshot(ctx), but the runner never called
it. Each step now writes <run>/screenshots/step-NNNNN.png right after
the trace line, using the same failure-is-a-warning posture as other
best-effort observability hooks. Makes the inspect UI's center panel
actually useful.
* feat(inspect): include action_label in StepSummary
Tap/InputText/Swipe/PressKey/Wait each get a short human-readable
label (selector, quoted text, swipe direction, key name, duration) so
the action list panel can render readable rows instead of just 'Tap'
with no target.
* test(inspect): accept either #app or #root in SPA shell fallback
* feat(web): render action_label and screen in ActionList rows
Step rows now show 'Tap id:save', 'InputText "alice"', 'Swipe up',
'PressKey back', etc. Steps with no action fall back to
'observe @ <screen>' so the list reads as a flow instead of a wall
of '--' placeholders.
* feat(sidecar): implement screencap for android driver backend
Was stubbed to return an empty byte array, which made the runner's
per-step screenshot capture a no-op. Shell out to 'adb exec-out
screencap -p' and stream the PNG bytes back. Width/height stay zero
because the PNG header carries them; the Go side can parse if needed.
* feat(proto): add Metrics RPC for per-step CPU and memory capture
* feat(driver): Metrics(bundleID) returns cpu_percent + heap/total bytes
* feat(sidecar): implement Metrics RPC via adb top + /proc/<pid>/status
* feat(runner): capture metrics + before/after screenshots per step
Each step now writes step-NNNNN.png (before applyAction) and
step-NNNNN-after.png (after the action + wait-for-idle). The runner
samples Driver.Metrics(bundleID) before writing the trace line and
stamps Step.Metrics with cpu_percent, heap_bytes, total_memory_bytes
so the inspect UI can chart CPU and heap over the run.
* fix(runner,sidecar): measure CPU across step via /proc stat delta
'top -d 0.3 -n 2' measures CPU in a 300ms window that coincides with
the SDK-paused app, always reporting 0%. Switch to reading
/proc/<pid>/stat utime+stime and computing the delta between successive
calls; the natural step cadence gives a 2-5s measurement window that
captures the action response and render cycle. Also moved the sample
to before snapshotStep so the delta starts before the SDK pause.
* feat(web): add Metrics type for per-step cpu and memory
* refactor(web): replace --accent-change with --accent-positive token
* refactor(web): recolor chip-progress as neutral outlined chip
* refactor(web): use neutral border for changed snapshot rows
* feat(web): add MetricsChart panel with HEAP and CPU lanes
SVG-based time-series chart rendering heap bytes and CPU percent per
step across two stacked lanes, with a shared step axis below. Lines are
monochrome; a vertical highlight marks the selected step; per-step hit
rects make any click seek to that step.
* feat(web): revamp ActionList with tag targets, elapsed time, and expandable rows
Render selector-based Tap actions as <tag/> markup, show zero-padded MM:SS.mmm
elapsed time per row, and expand the active row with Position/Content sub-rows
when a full Step is available. Adds formatActionRow/formatElapsed helpers and
covers both with unit tests.
* fix(runner): stop copying Tap selector into action.text
The 'Content' inspect row should show the user-supplied text for
InputText actions and stay empty for Taps. Previously the runner copied
action.On into traceAction.Text for both, so the inspect UI showed the
selector as the tap's 'Content'.
* fix(web): use text-muted for swipe arrow after accent-change removal
* fix(web): snapshot values truncate with ellipsis + title tooltip
Long JSON values were breaking one character per line due to
overflow-wrap:anywhere in a narrow column. Switch to single-line ellipsis
with the full value exposed via the title attribute on hover.
* feat(web): state-before/after columns + metrics chart at bottom
RunDetail now renders a four-column grid:
actions | state-before | state-after | side (exceptions + timeline)
with MetricsChart spanning the bottom row. Each state column shows its
own screenshot (step-NNNNN.png vs step-NNNNN-after.png), snapshot table,
and violations panel. ActionList now receives runStartMillis and the
selected Step so the active row can expand Position/Content sub-rows.
* fix(web): skip zero-value ticks + add exception markers to metrics
HEAP '0B' and CPU '100%' labels overlapped at the lane boundary. Drop
the bottom-of-range tick on both lanes (baseline is implied) and widen
LANE_GAP so the remaining labels have breathing room. Accept an
exceptionStepIndices prop and draw a dashed red vertical line at each
to surface exception spikes directly on the CPU/heap chart.
* fix(web): let action body column shrink below its content
Required minmax(0, 1fr) so the row grid honours the column's min-size of
0 instead of the implicit 'auto', preventing the action-list from
overflowing its parent when the target string is long.
* feat(web): bigger state screenshots + single properties row
Collapse snapshots into a summary chip ('SNAPSHOTS · N violations') so
the screenshot fills its state card. Deduplicate ViolationsPanel —
show it once in a new full-width 'properties' row between the state
cards and the timeline. Drop the right sidebar; exceptions now surface
as dashed markers on the metrics chart with the ExceptionsPanel only
rendering when there are actual exceptions to report.
* feat(web): add minimal Tabs component
Monochrome tab strip with underline-on-active. Used by state-before
and state-after cards to swap between Screenshot, Snapshots, Properties.
Pane scrolls internally so the outer grid stays fixed-height.
* feat(web): fold timeline into MetricsChart as STEPS lane
Adds a thin per-step status row above HEAP showing violated (red),
pending (dim gray) or holds (green-tinted). Extends highlight +
exception markers to span the status lane. Frees a whole row in the
detail grid so the page can fit in 100vh.
* refactor(web): tabbed state cards, drop standalone Timeline panel
State-before/after now use Tabs (Screenshot / Snapshots / Properties,
default Screenshot). Removes the dedicated timeline row; status lane
lives on the metrics chart. Banner is gone from the shell.
* feat(web): lock app shell to 100vh with no page scroll
html/body/#root fill the viewport, body gets overflow:hidden, and the
detail grid uses minmax(0, 1fr) rows so inner panels own their scroll.
Tightens toolbar + panel padding for a denser feel.
* feat(web): arrow-key nav + badges on Tabs (WAI-ARIA tablist)
Roving tabindex, ArrowLeft/Right/Up/Down/Home/End navigation, explicit
aria-selected/aria-controls/id wiring, and support for an optional
badge inside each tab (used for violation counts).
* feat(web): ViolationsPanel supports violationsOnly filter
* feat(web): ActionList arrow-key nav + listbox semantics + smaller font
Promote the list to role=listbox with role=option rows; roving tabindex
lets ArrowUp/Down (and Home/End) seek between steps with focus. Font
size dropped to 11px and padding tightened so long selector-tag labels
fit in the 340px actions column.
* fix(web): useKeyboardNav yields arrow keys to tablist/listbox targets
Previously pressing ArrowRight on a focused tab switched tabs AND
advanced the step. Skip arrow handling when the event target is inside
an element with an arrow-owning ARIA role.
* feat(web): fourth 'Violations' tab + wider actions + shorter metrics
Adds a Violations tab to each state card showing only violated properties
(with count badge on the tab label when > 0). Actions column widened
from 280px to 340px, bottom metrics strip trimmed from 220px to 140px
with tighter lane heights, so the whole page still fits in 100vh with
no scrollbar.
* feat(web): compact RunDetail layout using 1px borders instead of panel padding
* refactor(inspect): simplify MetricsChart to HEAP+CPU with time axis
Drop the STEPS status lane and per-sample circle markers, switch the
x-axis from step indices to mm:ss clock time, trim y-axis ticks to
min/max with compact units, rotate lane labels into the left gutter,
and replace the thin playhead line with a wider dotted red band.
Traces stay grayscale; red appears only on the playhead pattern.
* fix(web): RunList rows no longer stretch to fill viewport height
Tables inherited flex: 1 1 auto from .app-main > * and distributed extra
vertical space across rows. Override with flex: 0 0 auto + align-self.
* misc changes
* fix(web): hoist useState above early return in MetricsChart
Calling useState after an unconditional early return violates React's
Rules of Hooks: the empty-samples branch renders 0 hooks while the
populated branch calls 1. On the initial null->loaded transition of
history the hook count changes and React throws.
* fix(web): subscribe to named SSE event instead of 'message'
Server emits 'event: runs.changed' frames; the WHATWG EventSource spec
dispatches those as events of type 'runs.changed', not 'message'. The
listener registered on 'message' was never fired, so RunList never
auto-refreshed on run create/finish/delete.
* fix(inspect): unsubscribe SSE clients on disconnect
Watcher.Subscribe appended to a slice with no matching removal path,
so every closed EventSource connection leaked its channel. Over a
long-running server the slice grew unbounded and every fs event paid
O(N) iterating dead channels. Add Unsubscribe + defer it in
handleEvents.
Unsubscribe does not close the channel: broadcast snapshots the
slice without holding the mutex, so a concurrent close would race
with its non-blocking send.
* fix(trace): rename resolvedBounds/tapPoint to snake_case
Every other json tag in the trace schema (from_x, duration_millis,
bundle_sha256, etc.) uses snake_case. The two new Action fields
introduced with the inspect UI broke that pattern. Rename them
before the format ships to external consumers.
* chore(web): drop vitest and remove UI tests from CI
No UI tests wanted in web. Removes vitest, jsdom, testing-library
devDeps and the vitest.setup.ts + vite.config.ts test block.
Makefile test-web becomes web-typecheck (typecheck only).
Fixes CI failure where `vitest run` exits 1 with no test files.
* chore(make): dedupe sidecar embed and drop recursive make
Make $(SIDECAR_JAR) the real recipe and $(SIDECAR_EMBED) a file
target, so uatu/install/inspect-dev share one copy step and
sidecar/release-cli just depend on the jar instead of re-invoking make.
* feat(ltl): add Now/Next/Eventually/Implies/Or/And/Not formulas
Replace the fold-with-latch evaluator with a residual-formula reducer.
Each Observe() instantiates a fresh obligation from the root (stripping
an outer Always), reduces each pending obligation against current state,
latches Violated on first failure, and surfaces Pending verdicts for
deferred obligations. Existing Always/Pure/Thunk tests continue to pass.
* feat(ltl): support relative duration for eventually().within()
* feat(proto): add Swipe, PressKey, RecentLogs RPCs
* feat(verifier,runner): formula handles, new action kinds, rich state
- verifier: add formula-spec registry; bindNow/bindNext/bindEventually with
chainable .implies/.or/.and/.not and .within(n,unit) on eventually; bindFrom
for uniform sampling. bindAlways keeps accepting plain predicates.
- verifier: store lastTree, lastAction, step time, logs, exceptions on the
Verifier; SnapshotInput replaces the (snapshots, tree) pair. stateObject now
produces state.lastAction/time/logs/exceptions matching the TS State type.
- verifier: make taps/swipes/waitOnce/pressKey built-in generators actually
fire; taps picks a clickable, enabled element from the last hierarchy.
- agent: add exceptions field to Message wire format.
- driver: add Swipe/PressKey/RecentLogs to Driver interface; wire maestro
client and mock driver. LogEntry exposed for runner consumption.
- runner: apply Swipe/PressKey/Wait actions; collect logcat and exceptions;
pass lastAction and step time into PushSnapshot.
* feat(spec-api): LTL operators, new actions, richer State
- ltl.ts exports now/next/eventually; always overload accepts a Formula
- types.ts: Formula gains implies/or/and/not; EventuallyFormula adds .within;
State gains lastAction/time/logs/exceptions; Swipe/PressKey/Wait action types
- actions.ts: Swipe/PressKey/Wait/from constructors; waitOnce + pressKey
default generators
- tests exercise the chaining, sampling, and new actions through a recorded
fake runtime
* feat(sidecar): add swipe, pressKey, recentLogs RPC handlers
* feat(sdk-android): capture uncaught exceptions
Install a default uncaught handler on Uatu.start, chained with any
existing handler so Android's crash reporter still runs. Expose
Uatu.reportError for callers to forward caught throwables. A bounded
circular buffer (default 50) drains into each STATE message's new
exceptions field. Protocol.kt serializes/deserializes the field,
matching the Go wire format added to internal/agent/protocol.go.
* feat(spec-api): add @uatu/spec/defaults/properties bundle
* feat(sample-app): exercise new LTL operators + defaults
spec.ts now imports eventually/next/now/from from @uatu/spec and
noUncaughtExceptions from @uatu/spec/defaults/properties. It declares
three properties that exercise the new surface:
- accountCountNonNegative: plain always() safety
- addAccountAdvances: always(now(x).implies(next(y)))
- eventuallyLoggedIn: eventually(p).within(30, "seconds")
- noUncaughtExceptions: imported default
The weighted actions root uses from() for random phone/name sampling
and entries for taps/swipes/waitOnce/pressKey built-ins.
SampleApplication gains a debug hook gated on the system property
uatu.inject_error so the e2e run can synthesize an Uatu.reportError and
verify noUncaughtExceptions violates.
cmd/uatu/test_run.go adds a subpath alias so specs importing
"@uatu/spec/defaults/properties" resolve against the in-tree source
when running from the uatu checkout. The spec-integration tests swap
the old click-counter fixtures for the new login hierarchy.
* feat(trace): record swipe/key/wait details + exceptions
trace.Step gains an Exceptions array so the trace captures the
class/message/stackTrace for each SDK-reported throwable in a step.
trace.Action gains FromX/FromY/ToX/ToY/Key/DurationMillis so the full
payload of Swipe/PressKey/Wait actions is visible in trace.jsonl.
sample-app's debug error hook now gates on ApplicationInfo.DEBUGGABLE
instead of a system property (adb setprop fails on non-rooted
emulators).
Supports Always over Pure/Thunk leaves; eventually/next/bounds
deferred. Once a thunk returns false under an Always, the verdict
latches to violated so the runner can surface the offending step
without later observations masking it.
pj