feat(studio): nest per-iteration / per-region step logs in the flow Runs panel (#1505) by os-zhuang · Pull Request #2667 · objectstack-ai/objectui

os-zhuang · 2026-07-18T15:31:36Z

Summary

Completes the observability surface for ADR-0031 structured control-flow regions (loop / parallel / try_catch). The automation engine already folds each region's body steps into the run log tagged with parentNodeId / iteration / regionKind (framework #1505, now merged) — but the Studio Runs panel ignored those fields and rendered the step log flat. A loop therefore showed as a single container step followed by its per-iteration body steps as an undifferentiated repeat of the same node ids; parallel branches and try/catch handlers were flattened the same way. This is the UI half of the issue.

FlowRunsPanel (Studio → flow preview → Runs) now reconstructs the execution tree from the flat, pre-order step log and nests body steps under their container node, grouped by a per-iteration / per-branch / handler header.

What changed

FlowRunsPanel.tsx
- RunStep extended with the engine's grouping fields (parentNodeId, iteration, regionKind) from ExecutionStepLogSchema.
- buildStepTree() — reconstructs the container→children execution tree from the flat log via a stack walk. Robust to the two things that break naive grouping: repeated node ids (a loop body node runs once per iteration) and regions nested inside regions. Degrades safely — a body step whose container was dropped by durable-history truncation surfaces at the top level rather than vanishing.
- regionLabel() — 1-based Iteration N / Branch N, and Try / Catch.
- Recursive StepNode + RegionHeader rendering with per-iteration/branch/handler headers and depth indentation. Top-level, region-free runs render exactly as before.
Tests — buildStepTree / regionLabel unit tests (flat, loop, parallel, try/catch, nested loop, truncated-history orphan) and a render test asserting the loop per-iteration headers.
Changeset — minor bump for @object-ui/app-shell.

Representation

Each body step carries only its immediate container (innermost-wins tagging in the engine), and a whole region's steps are contiguous in the array (the engine appends NodeExecutionResult.childSteps in one shot), so the flat log is a faithful pre-order DFS — which is what makes the stack-based tree reconstruction exact, including for nested regions. No engine/API change is required; the fields already flow through getRun / listRuns untouched.

Verification

vitest run on both test files — 20/20 pass.
turbo run type-check --filter=@object-ui/app-shell — passes (29/29).
eslint on the changed files — 0 errors.

Closes #1505.

🤖 Generated with Claude Code

Generated by Claude Code

…uns panel (#1505) FlowRunsPanel rendered a run's step log flat, so a `loop` container showed as a single step and its body steps — one set per iteration — appeared as an undifferentiated repeat of the same node ids, with `parallel` branches and `try`/`catch` handlers likewise flattened. The automation engine already tags each structured-region body step with its container (`parentNodeId`) plus an `iteration` / `regionKind` (ADR-0031, framework #1505); the panel ignored them. Reconstruct the execution tree from the flat, pre-order step log (`buildStepTree`) and nest body steps under their container node, grouped by a per-iteration / per-branch / handler header (`Iteration 2`, `Branch 1`, `Try`, `Catch`). The reconstruction is robust to repeated node ids (a loop body node runs once per iteration) and to regions nested inside regions, and degrades safely — a body step whose container was dropped by durable-history truncation still surfaces at the top level rather than vanishing. Adds `buildStepTree` / `regionLabel` unit tests and a render test asserting the loop per-iteration headers. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VuvxWgoadqryqBcjs7TpVi

vercel · 2026-07-18T15:31:42Z

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Project	Deployment	Actions	Updated (UTC)
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github-actions · 2026-07-18T15:35:25Z

✅ Console Performance Budget

Metric	Value	Budget
Main entry (gzip)	28.0 KB	350 KB
Entry file	`index-IKDHA4Ef.js`	—
Status	PASS	—

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Size Limits

✅ Core packages should be < 50KB gzipped
✅ Component packages should be < 100KB gzipped
⚠️ Plugin packages should be < 150KB gzipped

… flow canvas (#2670) (#2675) Phase 1 of #2670 (ADR-0031 designer rendering follow-up to the Runs-panel nesting in #2667). The flow designer rendered `loop`/`parallel`/`try_catch` containers as opaque single cards; their nested regions (`config.body` / `config.branches[]` / `config.try`/`catch`) were only visible as raw JSON. - `extractRegions(node)` (flow-canvas-layout) — pure: pulls a container's labeled regions from config; returns [] for ordinary nodes and legacy flat loops. - `flow-region-view` — read-only mini-canvas for a region, reusing `computeLayout` / `diagramSize` / `edgePath` at full scale then fitting to width with one CSS transform (no new layout engine). - `NodeCard` — a container gains a "show nested regions" control that opens the region(s) in a Popover, each with a header (named branch / `Branch N` / `Try` / `Catch`). Floating + portaled, so it never overlaps canvas nodes and needs no change to the layout or edge routing — zero regression to existing flows. Read-only for now; inline push-down nesting and nested editing are the next increments on #2670. Adds `extractRegions` unit tests and FlowCanvas render tests (loop body, parallel branch labels, legacy-loop has no control). Claude-Session: https://claude.ai/code/session_01VuvxWgoadqryqBcjs7TpVi Co-authored-by: Claude <noreply@anthropic.com>

github-actions Bot added the tests label Jul 18, 2026

os-zhuang marked this pull request as ready for review July 18, 2026 15:38

os-zhuang merged commit 12390de into main Jul 18, 2026
14 checks passed

os-zhuang deleted the claude/step-logs-run-observability-plxc2p branch July 18, 2026 15:39

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feat(studio): nest per-iteration / per-region step logs in the flow Runs panel (#1505)#2667

feat(studio): nest per-iteration / per-region step logs in the flow Runs panel (#1505)#2667
os-zhuang merged 1 commit into
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os-zhuang commented Jul 18, 2026

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