feat: add BPMN inspection and workflow progress visuals

docs/BPMN_INTEROPERABILITY.md

@@ -0,0 +1,37 @@
+# BPMN Interoperability
+
+GovOPlaN distinguishes BPMN notation and XML interchange from executable
+workflow semantics.
+
+## Current Contract
+
+- `GET /api/v1/workflow/bpmn/profile` publishes the exact native support
+  profile.
+- `POST /api/v1/workflow/bpmn/inspect` safely parses bounded BPMN 2.0 XML,
+  inventories every BPMN model element, detects duplicate IDs and selected
+  dangling references, and classifies elements as interchange-only, natively
+  mappable, or natively executable.
+- XML entities, DTD-based expansion, oversized documents, and malformed roots
+  are rejected.
+- The native GovOPlaN graph remains the authoritative executable definition.
+
+Inspection is not XML Schema validation and does not claim that every BPMN
+semantic construct can be executed. A future `bpmn-js`/`bpmn-moddle` adapter
+can provide complete visual notation and XML round-tripping without forcing
+unsupported elements into the native runner.
+
+## Execution Boundary
+
+Adding a BPMN shape is not equivalent to implementing its token semantics,
+event subscriptions, compensation, transactions, choreography, or conformance
+behavior. Each executable mapping therefore needs:
+
+1. an explicit native semantic mapping;
+2. validation rules and lifecycle behavior;
+3. resumability and idempotency tests;
+4. migration and round-trip fixtures;
+5. a declared fallback when the installed runtime cannot execute it.
+
+Unsupported constructs remain visible and preserved by the future interchange
+adapter, but activation must remain blocked until an execution adapter declares
+support.

docs/VISUAL_MODEL.md

@@ -0,0 +1,24 @@
+# Workflow Visual Model
+
+The Campaign review flow is the reference for runtime workflow progress:
+
+- a compact stage rail communicates order, current state, completion, warning,
+  failure, partial progress, and locks;
+- the active handoff owns the detailed controls;
+- evidence remains visible without turning every stage into a permanent card;
+- unavailable stages stay visibly unavailable while non-blocking optional
+  stages do not interrupt the connector state.
+
+Workflow now applies that language to instance progress without importing
+Campaign code. Once the state vocabulary has stabilized, the rail should move
+to Core as a generic process-stage component and Campaign should consume it.
+
+Navigation has three distinct layers:
+
+1. the platform siderail selects a module or focused View;
+2. the module workspace selects an object or definition;
+3. the workflow stage rail describes progress inside that object.
+
+A focused View or active Workflow may suppress unrelated platform and module
+navigation, but must always provide a visible escape back to the normal View.
+Modules should not add another persistent navigation tier for workflow stages.

pyproject.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.12"
 license = "AGPL-3.0-or-later"
 authors = [{ name = "GovOPlaN" }]
-dependencies = ["govoplan-core>=0.1.14"]
+dependencies = ["defusedxml>=0.7,<1", "govoplan-core>=0.1.14"]
 
 [tool.setuptools.packages.find]
 where = ["src"]

src/govoplan_workflow/backend/bpmn.py

@@ -0,0 +1,309 @@
+from __future__ import annotations
+
+from collections import Counter
+from dataclasses import dataclass
+from typing import Literal
+from xml.etree.ElementTree import ParseError
+
+from defusedxml.ElementTree import fromstring
+from defusedxml.common import DefusedXmlException
+
+
+BPMN_MODEL_NAMESPACE = "http://www.omg.org/spec/BPMN/20100524/MODEL"
+BPMN_DI_NAMESPACE = "http://www.omg.org/spec/BPMN/20100524/DI"
+OMG_DI_NAMESPACE = "http://www.omg.org/spec/DD/20100524/DI"
+OMG_DC_NAMESPACE = "http://www.omg.org/spec/DD/20100524/DC"
+MAX_BPMN_XML_BYTES = 1_048_576
+MAX_BPMN_ELEMENTS = 20_000
+
+SupportLevel = Literal[
+    "interchange_only",
+    "native_mapping",
+    "native_execution",
+]
+
+
+NATIVE_EXECUTION_ELEMENTS = frozenset(
+    {
+        "startEvent",
+        "endEvent",
+        "manualTask",
+        "userTask",
+        "serviceTask",
+        "businessRuleTask",
+        "receiveTask",
+        "sendTask",
+        "exclusiveGateway",
+        "parallelGateway",
+        "sequenceFlow",
+        "intermediateCatchEvent",
+        "intermediateThrowEvent",
+    }
+)
+
+NATIVE_MAPPING_ELEMENTS = NATIVE_EXECUTION_ELEMENTS | frozenset(
+    {
+        "task",
+        "scriptTask",
+        "callActivity",
+        "subProcess",
+        "transaction",
+        "adHocSubProcess",
+        "inclusiveGateway",
+        "eventBasedGateway",
+        "complexGateway",
+        "boundaryEvent",
+        "eventSubProcess",
+        "dataObject",
+        "dataObjectReference",
+        "dataStoreReference",
+        "messageFlow",
+        "participant",
+        "lane",
+        "laneSet",
+        "textAnnotation",
+        "association",
+        "group",
+    }
+)
+
+
+@dataclass(frozen=True, slots=True)
+class BpmnDiagnostic:
+    severity: Literal["error", "warning", "info"]
+    code: str
+    message: str
+    element_id: str | None = None
+
+
+@dataclass(frozen=True, slots=True)
+class BpmnElementInventoryItem:
+    element_type: str
+    element_id: str | None
+    name: str | None
+    parent_type: str | None
+    parent_id: str | None
+    support_level: SupportLevel
+
+
+@dataclass(frozen=True, slots=True)
+class BpmnInspection:
+    definitions_id: str | None
+    target_namespace: str | None
+    process_count: int
+    executable_process_count: int
+    collaboration_count: int
+    choreography_count: int
+    element_counts: dict[str, int]
+    support_counts: dict[str, int]
+    elements: tuple[BpmnElementInventoryItem, ...]
+    diagnostics: tuple[BpmnDiagnostic, ...]
+
+    @property
+    def valid_xml(self) -> bool:
+        return not any(item.severity == "error" for item in self.diagnostics)
+
+
+class BpmnInspectionError(ValueError):
+    pass
+
+
+def bpmn_support_level(element_type: str) -> SupportLevel:
+    if element_type in NATIVE_EXECUTION_ELEMENTS:
+        return "native_execution"
+    if element_type in NATIVE_MAPPING_ELEMENTS:
+        return "native_mapping"
+    return "interchange_only"
+
+
+def inspect_bpmn_xml(xml: str) -> BpmnInspection:
+    encoded = xml.encode("utf-8")
+    if not encoded:
+        raise BpmnInspectionError("BPMN XML is empty")
+    if len(encoded) > MAX_BPMN_XML_BYTES:
+        raise BpmnInspectionError(
+            f"BPMN XML exceeds the {MAX_BPMN_XML_BYTES}-byte inspection limit"
+        )
+    try:
+        root = fromstring(encoded)
+    except (DefusedXmlException, ParseError, ValueError) as exc:
+        raise BpmnInspectionError(f"BPMN XML is not safe and well formed: {exc}") from exc
+
+    namespace, local_name = _qualified_name(root.tag)
+    if namespace != BPMN_MODEL_NAMESPACE or local_name != "definitions":
+        raise BpmnInspectionError(
+            "BPMN document root must be bpmn:definitions in the BPMN 2.0 model namespace"
+        )
+
+    diagnostics: list[BpmnDiagnostic] = []
+    elements: list[BpmnElementInventoryItem] = []
+    ids: dict[str, str] = {}
+    references: list[tuple[str, str | None, str]] = []
+    process_count = 0
+    executable_process_count = 0
+    collaboration_count = 0
+    choreography_count = 0
+
+    stack = [(root, None, None)]
+    visited = 0
+    while stack:
+        element, parent_type, parent_id = stack.pop()
+        visited += 1
+        if visited > MAX_BPMN_ELEMENTS:
+            raise BpmnInspectionError(
+                f"BPMN document exceeds the {MAX_BPMN_ELEMENTS}-element inspection limit"
+            )
+        element_namespace, element_type = _qualified_name(element.tag)
+        element_id = _bounded_attribute(element.attrib.get("id"), 255)
+        if element_namespace == BPMN_MODEL_NAMESPACE:
+            name = _bounded_attribute(element.attrib.get("name"), 300)
+            support = bpmn_support_level(element_type)
+            elements.append(
+                BpmnElementInventoryItem(
+                    element_type=element_type,
+                    element_id=element_id,
+                    name=name,
+                    parent_type=parent_type,
+                    parent_id=parent_id,
+                    support_level=support,
+                )
+            )
+            if element_id:
+                previous = ids.get(element_id)
+                if previous is not None:
+                    diagnostics.append(
+                        BpmnDiagnostic(
+                            severity="error",
+                            code="duplicate_bpmn_id",
+                            message=(
+                                f"BPMN id {element_id!r} is used by both "
+                                f"{previous} and {element_type}"
+                            ),
+                            element_id=element_id,
+                        )
+                    )
+                else:
+                    ids[element_id] = element_type
+            if element_type == "process":
+                process_count += 1
+                if element.attrib.get("isExecutable", "").strip().lower() == "true":
+                    executable_process_count += 1
+            elif element_type == "collaboration":
+                collaboration_count += 1
+            elif element_type in {"choreography", "globalChoreographyTask"}:
+                choreography_count += 1
+            _collect_references(element_type, element_id, element.attrib, references)
+            next_parent_type = element_type
+            next_parent_id = element_id
+        else:
+            next_parent_type = parent_type
+            next_parent_id = parent_id
+        for child in reversed(list(element)):
+            stack.append((child, next_parent_type, next_parent_id))
+
+    if process_count == 0 and collaboration_count == 0 and choreography_count == 0:
+        diagnostics.append(
+            BpmnDiagnostic(
+                severity="warning",
+                code="no_bpmn_process_or_collaboration",
+                message="BPMN definitions contain no process, collaboration, or choreography",
+            )
+        )
+    for reference, element_id, field in references:
+        if reference not in ids:
+            diagnostics.append(
+                BpmnDiagnostic(
+                    severity="error",
+                    code="dangling_bpmn_reference",
+                    message=(
+                        f"{field} references unknown BPMN id {reference!r}"
+                    ),
+                    element_id=element_id,
+                )
+            )
+    unsupported = [
+        item
+        for item in elements
+        if item.support_level == "interchange_only"
+        and item.element_type not in {"definitions", "process"}
+    ]
+    if unsupported:
+        diagnostics.append(
+            BpmnDiagnostic(
+                severity="info",
+                code="interchange_only_elements",
+                message=(
+                    f"{len(unsupported)} BPMN element(s) can be inventoried and "
+                    "round-tripped by a BPMN modeler but are not executable by "
+                    "the native GovOPlaN workflow runtime"
+                ),
+            )
+        )
+    element_counts = dict(
+        sorted(Counter(item.element_type for item in elements).items())
+    )
+    support_counts = dict(
+        sorted(Counter(item.support_level for item in elements).items())
+    )
+    return BpmnInspection(
+        definitions_id=_bounded_attribute(root.attrib.get("id"), 255),
+        target_namespace=_bounded_attribute(
+            root.attrib.get("targetNamespace"),
+            1000,
+        ),
+        process_count=process_count,
+        executable_process_count=executable_process_count,
+        collaboration_count=collaboration_count,
+        choreography_count=choreography_count,
+        element_counts=element_counts,
+        support_counts=support_counts,
+        elements=tuple(elements),
+        diagnostics=tuple(diagnostics),
+    )
+
+
+def _collect_references(
+    element_type: str,
+    element_id: str | None,
+    attributes: dict[str, str],
+    references: list[tuple[str, str | None, str]],
+) -> None:
+    fields: tuple[str, ...]
+    if element_type == "sequenceFlow":
+        fields = ("sourceRef", "targetRef")
+    elif element_type == "messageFlow":
+        fields = ("sourceRef", "targetRef", "messageRef")
+    elif element_type == "participant":
+        fields = ("processRef",)
+    elif element_type == "lane":
+        fields = ("partitionElementRef",)
+    else:
+        fields = ()
+    for field in fields:
+        value = attributes.get(field)
+        if value:
+            references.append((value, element_id, field))
+
+
+def _qualified_name(tag: str) -> tuple[str | None, str]:
+    if tag.startswith("{") and "}" in tag:
+        namespace, local_name = tag[1:].split("}", 1)
+        return namespace, local_name
+    return None, tag
+
+
+def _bounded_attribute(value: str | None, limit: int) -> str | None:
+    if value is None:
+        return None
+    text = value.strip()
+    return text[:limit] if text else None
+
+
+__all__ = [
+    "BPMN_MODEL_NAMESPACE",
+    "BpmnInspectionError",
+    "NATIVE_EXECUTION_ELEMENTS",
+    "NATIVE_MAPPING_ELEMENTS",
+    "bpmn_support_level",
+    "inspect_bpmn_xml",
+]

src/govoplan_workflow/backend/router.py

@@ -29,7 +29,19 @@ from govoplan_workflow.backend.manifest import (
     INSTANCE_TRANSITION_SCOPE,
 )
 from govoplan_workflow.backend.node_library import WORKFLOW_GRAPH_LIBRARY
+from govoplan_workflow.backend.bpmn import (
+    BPMN_MODEL_NAMESPACE,
+    BpmnInspectionError,
+    NATIVE_EXECUTION_ELEMENTS,
+    NATIVE_MAPPING_ELEMENTS,
+    inspect_bpmn_xml,
+)
 from govoplan_workflow.backend.schemas import (
+    BpmnDiagnosticResponse,
+    BpmnElementSupportResponse,
+    BpmnInspectionRequest,
+    BpmnInspectionResponse,
+    BpmnSupportProfileResponse,
     WorkflowConfigFieldResponse,
     WorkflowDefinitionActivateRequest,
     WorkflowDefinitionCreateRequest,
@@ -204,6 +216,85 @@ def _require_instance_view(instance, principal: ApiPrincipal) -> None:
     )
 
 
+@router.get("/bpmn/profile", response_model=BpmnSupportProfileResponse)
+def api_bpmn_support_profile(
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> BpmnSupportProfileResponse:
+    _require_any_scope(
+        principal,
+        DEFINITION_READ_SCOPE,
+        DEFINITION_WRITE_SCOPE,
+        ADMIN_SCOPE,
+    )
+    return BpmnSupportProfileResponse(
+        specification="BPMN 2.0.2",
+        model_namespace=BPMN_MODEL_NAMESPACE,
+        interchange=(
+            "Secure XML inventory and diagnostics are available. Visual "
+            "round-trip modeling requires the planned bpmn-js adapter."
+        ),
+        native_runtime=(
+            "Only the explicitly listed executable subset maps to current "
+            "native runtime semantics; all other elements are interchange-only."
+        ),
+        native_execution_elements=sorted(NATIVE_EXECUTION_ELEMENTS),
+        native_mapping_elements=sorted(
+            NATIVE_MAPPING_ELEMENTS - NATIVE_EXECUTION_ELEMENTS
+        ),
+    )
+
+
+@router.post("/bpmn/inspect", response_model=BpmnInspectionResponse)
+def api_inspect_bpmn(
+    payload: BpmnInspectionRequest,
+    principal: ApiPrincipal = Depends(get_api_principal),
+) -> BpmnInspectionResponse:
+    _require_any_scope(
+        principal,
+        DEFINITION_READ_SCOPE,
+        DEFINITION_WRITE_SCOPE,
+        ADMIN_SCOPE,
+    )
+    try:
+        result = inspect_bpmn_xml(payload.xml)
+    except BpmnInspectionError as exc:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
+            detail=str(exc),
+        ) from exc
+    return BpmnInspectionResponse(
+        valid_xml=result.valid_xml,
+        definitions_id=result.definitions_id,
+        target_namespace=result.target_namespace,
+        process_count=result.process_count,
+        executable_process_count=result.executable_process_count,
+        collaboration_count=result.collaboration_count,
+        choreography_count=result.choreography_count,
+        element_counts=result.element_counts,
+        support_counts=result.support_counts,
+        elements=[
+            BpmnElementSupportResponse(
+                element_type=item.element_type,
+                element_id=item.element_id,
+                name=item.name,
+                parent_type=item.parent_type,
+                parent_id=item.parent_id,
+                support_level=item.support_level,
+            )
+            for item in result.elements
+        ],
+        diagnostics=[
+            BpmnDiagnosticResponse(
+                severity=item.severity,
+                code=item.code,
+                message=item.message,
+                element_id=item.element_id,
+            )
+            for item in result.diagnostics
+        ],
+    )
+
+
 @router.get("/node-types", response_model=WorkflowNodeLibraryResponse)
 def api_node_types(
     principal: ApiPrincipal = Depends(get_api_principal),

src/govoplan_workflow/backend/schemas.py

@@ -10,6 +10,11 @@ from pydantic import BaseModel, Field, field_validator
 WorkflowDefinitionStatus = Literal["draft", "active", "archived"]
 DefinitionScopeType = Literal["system", "tenant", "group", "user"]
 DefinitionKind = Literal["flow", "template"]
+BpmnSupportLevel = Literal[
+    "interchange_only",
+    "native_mapping",
+    "native_execution",
+]
 
 
 class WorkflowPosition(BaseModel):
@@ -100,6 +105,49 @@ class WorkflowNodeLibraryResponse(BaseModel):
     nodes: list[WorkflowNodeTypeResponse]
 
 
+class BpmnInspectionRequest(BaseModel):
+    xml: str = Field(min_length=1, max_length=1_048_576)
+
+
+class BpmnElementSupportResponse(BaseModel):
+    element_type: str
+    element_id: str | None = None
+    name: str | None = None
+    parent_type: str | None = None
+    parent_id: str | None = None
+    support_level: BpmnSupportLevel
+
+
+class BpmnDiagnosticResponse(BaseModel):
+    severity: Literal["error", "warning", "info"]
+    code: str
+    message: str
+    element_id: str | None = None
+
+
+class BpmnInspectionResponse(BaseModel):
+    valid_xml: bool
+    definitions_id: str | None = None
+    target_namespace: str | None = None
+    process_count: int
+    executable_process_count: int
+    collaboration_count: int
+    choreography_count: int
+    element_counts: dict[str, int]
+    support_counts: dict[str, int]
+    elements: list[BpmnElementSupportResponse]
+    diagnostics: list[BpmnDiagnosticResponse]
+
+
+class BpmnSupportProfileResponse(BaseModel):
+    specification: str
+    model_namespace: str
+    interchange: str
+    native_runtime: str
+    native_execution_elements: list[str]
+    native_mapping_elements: list[str]
+
+
 class WorkflowDefinitionRevisionResponse(BaseModel):
     id: str
     revision: int

tests/test_bpmn.py

@@ -0,0 +1,85 @@
+from __future__ import annotations
+
+import unittest
+
+from govoplan_workflow.backend.bpmn import (
+    BpmnInspectionError,
+    inspect_bpmn_xml,
+)
+
+
+BPMN = """<?xml version="1.0" encoding="UTF-8"?>
+<bpmn:definitions
+  xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL"
+  id="Definitions_1"
+  targetNamespace="https://govoplan.example.test/workflow">
+  <bpmn:process id="Process_1" isExecutable="true">
+    <bpmn:startEvent id="Start_1" />
+    <bpmn:userTask id="Review_1" name="Review request" />
+    <bpmn:exclusiveGateway id="Decision_1" />
+    <bpmn:endEvent id="End_1" />
+    <bpmn:sequenceFlow id="Flow_1" sourceRef="Start_1" targetRef="Review_1" />
+    <bpmn:sequenceFlow id="Flow_2" sourceRef="Review_1" targetRef="Decision_1" />
+    <bpmn:sequenceFlow id="Flow_3" sourceRef="Decision_1" targetRef="End_1" />
+  </bpmn:process>
+  <bpmn:collaboration id="Collaboration_1">
+    <bpmn:participant id="Participant_1" processRef="Process_1" />
+  </bpmn:collaboration>
+</bpmn:definitions>
+"""
+
+
+class BpmnInspectionTests(unittest.TestCase):
+    def test_inventory_classifies_native_and_interchange_elements(self) -> None:
+        result = inspect_bpmn_xml(BPMN)
+
+        self.assertTrue(result.valid_xml)
+        self.assertEqual(1, result.process_count)
+        self.assertEqual(1, result.executable_process_count)
+        self.assertEqual(1, result.collaboration_count)
+        self.assertEqual(3, result.element_counts["sequenceFlow"])
+        review = next(
+            item for item in result.elements if item.element_id == "Review_1"
+        )
+        collaboration = next(
+            item
+            for item in result.elements
+            if item.element_id == "Collaboration_1"
+        )
+        self.assertEqual("native_execution", review.support_level)
+        self.assertEqual("interchange_only", collaboration.support_level)
+
+    def test_dangling_references_are_reported(self) -> None:
+        result = inspect_bpmn_xml(
+            BPMN.replace('targetRef="End_1"', 'targetRef="Missing_1"')
+        )
+
+        self.assertFalse(result.valid_xml)
+        self.assertTrue(
+            any(
+                item.code == "dangling_bpmn_reference"
+                for item in result.diagnostics
+            )
+        )
+
+    def test_entities_are_rejected(self) -> None:
+        unsafe = """<!DOCTYPE foo [<!ENTITY xxe SYSTEM "file:///etc/passwd">]>
+<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL"
+ id="Definitions_1" targetNamespace="x">&xxe;</bpmn:definitions>"""
+
+        with self.assertRaisesRegex(
+            BpmnInspectionError,
+            "not safe and well formed",
+        ):
+            inspect_bpmn_xml(unsafe)
+
+    def test_non_bpmn_root_is_rejected(self) -> None:
+        with self.assertRaisesRegex(
+            BpmnInspectionError,
+            "bpmn:definitions",
+        ):
+            inspect_bpmn_xml("<definitions />")
+
+
+if __name__ == "__main__":
+    unittest.main()

webui/src/features/workflow/WorkflowRunsDialog.tsx

@@ -5,6 +5,10 @@ import {
   useState
 } from "react";
 import {
+  AlertTriangle,
+  Check,
+  Circle,
+  Clock3,
   ExternalLink,
   Play,
   RefreshCw,
@@ -417,13 +421,36 @@ export default function WorkflowRunsDialog({
                     <h3>Progress</h3>
                     <div>
                       {selected.steps.map((step) => (
-                        <span key={step.id}>
-                          <strong>{step.node_id}</strong>
-                          <small>
-                            {step.node_type} · attempt {step.attempt}
-                          </small>
-                          <StatusBadge status={step.status} label={step.status} />
-                        </span>
+                        <div
+                          key={step.id}
+                          className="workflow-run-stage"
+                          data-state={step.status}
+                          data-current={
+                            step.id === selected.current_step_id || undefined
+                          }
+                        >
+                          <span className="workflow-run-stage-marker">
+                            {step.status === "completed" ? (
+                              <Check size={15} aria-hidden="true" />
+                            ) : step.status === "failed" ? (
+                              <AlertTriangle size={15} aria-hidden="true" />
+                            ) : ["running", "waiting"].includes(step.status) ? (
+                              <Clock3 size={15} aria-hidden="true" />
+                            ) : (
+                              <Circle size={13} aria-hidden="true" />
+                            )}
+                          </span>
+                          <span className="workflow-run-stage-copy">
+                            <strong>{step.node_id}</strong>
+                            <small>
+                              {step.node_type} · attempt {step.attempt}
+                            </small>
+                            <StatusBadge
+                              status={step.status}
+                              label={step.status}
+                            />
+                          </span>
+                        </div>
                       ))}
                     </div>
                   </section>

webui/src/styles/workflow.css

@@ -328,14 +328,20 @@
 
 .workflow-palette-items {
   display: grid;
+  grid-auto-rows: max-content;
+  align-content: start;
   height: calc(100% - 44px);
   gap: 4px;
-  overflow: auto;
+  overflow-x: hidden;
+  overflow-y: auto;
   padding: 8px;
+  scrollbar-gutter: stable;
 }
 
 .workflow-palette-group {
   display: grid;
+  grid-auto-rows: max-content;
+  align-content: start;
   gap: 2px;
 }
 
@@ -548,11 +554,15 @@
 
 .workflow-inspector-fields {
   display: grid;
+  grid-auto-rows: max-content;
+  align-content: start;
   gap: 12px;
-  min-height: 0;
+  height: calc(100% - 44px);
   flex: 1 1 auto;
-  overflow: auto;
+  overflow-x: hidden;
+  overflow-y: auto;
   padding: 12px;
+  scrollbar-gutter: stable;
 }
 
 .workflow-inspector-fields input,
@@ -879,7 +889,6 @@
   display: grid;
 }
 
-.workflow-run-history > div > span,
 .workflow-run-events > div > span {
   display: grid;
   grid-template-columns: minmax(0, 1fr) minmax(160px, auto) auto;
@@ -890,6 +899,100 @@
   padding: 6px 2px;
 }
 
+.workflow-run-history > div {
+  grid-template-columns: repeat(
+    auto-fit,
+    minmax(min(150px, 100%), 1fr)
+  );
+  overflow-x: auto;
+  padding: 2px 0 4px;
+}
+
+.workflow-run-stage {
+  --workflow-stage-color: var(--line-dark);
+  position: relative;
+  display: grid;
+  min-width: 140px;
+  grid-template-columns: 32px minmax(0, 1fr);
+  gap: 7px;
+  padding: 4px 12px 4px 0;
+}
+
+.workflow-run-stage[data-state="completed"] {
+  --workflow-stage-color: var(--green);
+}
+
+.workflow-run-stage[data-state="running"],
+.workflow-run-stage[data-state="waiting"] {
+  --workflow-stage-color: var(--blue);
+}
+
+.workflow-run-stage[data-state="failed"],
+.workflow-run-stage[data-state="cancelled"] {
+  --workflow-stage-color: var(--red);
+}
+
+.workflow-run-stage[data-state="superseded"] {
+  --workflow-stage-color: var(--muted);
+}
+
+.workflow-run-stage:not(:last-child)::after {
+  position: absolute;
+  z-index: 0;
+  top: 18px;
+  left: 27px;
+  width: calc(100% - 17px);
+  height: 2px;
+  background: linear-gradient(
+    90deg,
+    var(--workflow-stage-color),
+    var(--line-dark)
+  );
+  content: "";
+}
+
+.workflow-run-stage-marker {
+  z-index: 1;
+  display: grid;
+  width: 30px;
+  height: 30px;
+  place-items: center;
+  border: 1px solid var(--workflow-stage-color);
+  border-radius: 50%;
+  background: var(--panel);
+  color: var(--workflow-stage-color);
+}
+
+.workflow-run-stage[data-current="true"] .workflow-run-stage-marker {
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--workflow-stage-color) 18%, transparent);
+}
+
+.workflow-run-stage-copy {
+  z-index: 1;
+  display: grid;
+  min-width: 0;
+  align-content: start;
+  gap: 3px;
+  padding-top: 2px;
+}
+
+.workflow-run-stage-copy strong,
+.workflow-run-stage-copy small {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.workflow-run-stage-copy strong {
+  color: var(--text-strong);
+  font-size: 11px;
+}
+
+.workflow-run-stage-copy .status-badge {
+  width: fit-content;
+  margin-top: 2px;
+}
+
 .workflow-run-history small,
 .workflow-run-events small {
   color: var(--muted);