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feat(desktop): trace signal detection + tri-view badges

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Adds a small signal-detection layer over trace payloads and surfaces
three kinds of semantic signals inline in the trace tri-view (Timeline
/ Graph / turn footer chips) so a researcher can spot repetitive
tool-call loops, redundant identical calls, and plan-completion beats
without hand-scanning the raw log:

- loop-detected  — three or more repeats of the same tool.method
                   signature inside a window, badge in Timeline gutter
                   + colored ring on the Graph node
- redundant-call — identical (tool, arg-hash) call twice without any
                   state change in between, badge + subdued styling
                   so it stays advisory not alarmist
- plan-* chips   — plan/subplan step-complete beats surfaced above the
                   assistant body in the turn footer, wired through
                   the finishTurnContainer tail

Pure rendering; no wire-format changes needed on the runtime side —
signal detection is fixture-driven off the same payload the tri-view
already consumes. Companion RFC L-2 in docs/upstream-ledger.md asks
the runtime to emit these signals natively rather than deriving them
in the shell, so once L-2 lands the shell will consume upstream signals
and this detector becomes a fallback.

Files:
  src/renderer/trace-signal-detect.js       new  (loop/redundant/plan)
  src/renderer/trace-tri-view.js            +24  (wire detector output)
  src/renderer/trace-timeline.js            +39  (badge in gutter)
  src/renderer/trace-graph.js               +30  (colored ring)
  src/renderer/renderer.js                  +81  (finishTurnContainer chips)
  src/renderer/index.html                    +1  (one script tag)
  src/renderer/style.css                    +58  (badge/ring/chip rules)
  docs/upstream-ledger.md                  +121  (append L-2 RFC)
  scripts/qa-trace-signals-fixture.mjs     new  (headless SVG proof)
  scripts/qa-trace-signals-shoot.mjs       new  (CDP live shoot)
  docs/trace-signals-shoot/*.html          new  (3 fixture-driven shots)
  test/trace-signal-detect.test.js         new  (detector unit tests)
  test/trace-signal-overlay.test.js        new  (renderer overlay tests)

Test suite: 1668/1668 pass (17 new). Fixture-driven signals-01-timeline-
loop.html regenerated byte-identical from the merged HEAD.
This commit is contained in:
ZiyaZhang
2026-07-19 00:55:55 -07:00
parent c05f1b6dd2
commit 47949244c8
15 changed files with 1639 additions and 1 deletions
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examples/desktop/src/renderer/index.html
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@@ -1323,6 +1323,7 @@
<script src="./inject-family.js"></script>
<script src="./raw-inject.js"></script><!-- ticket #15 B: envelope:'raw' classifier -->
<script src="./trace-aggregator.js"></script>
<script src="./trace-signal-detect.js"></script><!-- lane-trace-signals: heuristic signal detector (see docs/upstream-ledger.md L-2) -->
<script src="./trace-timeline.js"></script><!-- task #203: view B Gantt/waterfall -->
<script src="./trace-graph.js"></script><!-- task #203: view C agent node graph -->
<script src="./trace-detail-pane.js"></script><!-- task #205: right-side detail pane (4 tabs) -->