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SpaceZ v1: Flipper-class iOS UI debugger (SPM) - #1
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Implements the full lecture-37 system design end to end: DFS → immutable snapshot → normalized NodeStore → partial fetch/invalidation → descriptor adapters → diagnostics platform. - SpaceZCore: main-thread value-copy capture (iterative, 10k-depth safe), identity-stable NodeIDs (weak registry), normalized store, run-loop change detection with throttle, latest-wins pipeline, snapshot diff, redaction - SpaceZUIKit / SpaceZSwiftUI: UIKit descriptor + best-effort SwiftUI semantic tree via Mirror (body expansion for app views, transparent wrapper flattening, graceful fallback) - SpaceZRules: rule engine + 6 built-in diagnostics - SpaceZOverlay: in-app inspector (tree, search, properties, issues, tap-to-select, highlight) in a capture-excluded passthrough window - SpaceZRemote: zero-dependency HTTP+WebSocket server (Network.framework), token-gated, strict redaction by default, allowlisted setProperty, invalidation-based protocol, embedded single-file web inspector - DemoApp with planted bugs per rule; 55 unit tests incl. a capture performance gate; CI/CD workflows, CONTRIBUTING, PR/issue templates Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Gm5uDStDkL1FVyub9M2Zkc
"** TEST FAILED **" starts with a repetition operator, which some grep builds reject as an invalid regex (the CI runner's did, exit 2 after a fully green test run). -F matches the marker literally everywhere. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Gm5uDStDkL1FVyub9M2Zkc
The "** TEST SUCCEEDED **" marker isn't printed by every Xcode version, so a green run still failed the previous check on CI. The exit code is the contract; the log excerpt is kept for readability only. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Gm5uDStDkL1FVyub9M2Zkc
The 100 ms assertion flaked on a shared CI runner (102.9 ms vs ~90 ms locally). The diff runs off the main thread, so the gate's job is to catch a complexity regression, not to enforce a frame budget — 500 ms does that with headroom for runner noise. The main-thread capture gate (SPACEZ_CAPTURE_BUDGET_MS) is unchanged. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Gm5uDStDkL1FVyub9M2Zkc
…CURITY.md NWListener reports bind failures (EADDRINUSE) asynchronously via its state, so start() previously "succeeded" against an occupied port and printed an inspector URL that could never work. start() now waits for .ready on both listeners and throws on .failed; the session only sets and prints the URL after a successful bind, and the failure path prints the cause plus a remediation hint (the overlay keeps working either way). Verified on-simulator: with 9394/9395 held by another process the app launches cleanly, logs "Address already in use" with guidance, and prints no URL; with ports free everything works as before. Also adds SECURITY.md (private vulnerability reporting, in/out of scope). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Gm5uDStDkL1FVyub9M2Zkc
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What & Why
Initial implementation of SpaceZ — an open-source, SPM-importable UI debugging platform for iOS, implementing the lecture-37 system design end to end:
DFS → immutable snapshot → normalized NodeStore → partial fetch/invalidation → descriptor adapters → diagnostics platform.How
NodeDescriptoradapters (UIKit + best-effort SwiftUI semantic tree via Mirror),UIRulediagnostics (6 built-ins).setProperty, embedded single-file web inspector.SpaceZDebugger.start()is a no-op outside DEBUG.Performance impact
Baseline established by
CapturePerformanceTests:[SpaceZ perf] 5551 nodes — p50 10.50ms, p95 12.13ms(iPhone 15 Pro simulator, debug -Onone). CI gate at 50ms p95.Breaking changes
None (initial release).
How was this tested?
invisible-interactionbug detected; browser WS protocol exercised (hello/getTree/search/getIssues/setProperty/highlight/invalidate push); on-device highlight + redaction verified via screenshot and/snapshot.jsonswiftlint --strict: 0 violations🤖 Generated with Claude Code
https://claude.ai/code/session_01Gm5uDStDkL1FVyub9M2Zkc