[MathurAditya724]

Local discovers capturing and saved sessions from a daemon's plain loopback stream address. The searchable picker keeps feeds isolated, refreshes as runs start or expire, and restores the selected capture after reload. Local commands print a viewer link using the actual bound port.

The viewer now supports investigation beyond raw payload inspection:

• Capture controls: session/project context, capture state, connectivity, last received time and save deadline. Clear view, delete captured events, stop capture and disconnect have distinct scopes. Receiver switching probes the replacement before changing the feed; failed attempts preserve the current capture. Onboarding provides a copyable Local run command.
• Errors and feedback: exception causes, captured source context and frame variables, breadcrumbs, request/context data, tags and modules. Absolute local source paths have VS Code links, and Copy for AI produces a Markdown summary. Modern feedback and legacy user reports link to their associated captured error.
• AI inspection: standard GenAI and Vercel AI fields from embedded and standalone spans show model/provider, token usage, system instructions, messages, responses and tool arguments/results. Child AI steps stay connected to the interaction. Spans identified only by operation or origin remain visible when content was not captured.
• Performance insights: queries and resources group exact operation/description pairs, sort by executions/duration/size, and open individual executions in their trace. Web Vitals compares captured measurements by page and visit, with explicit units and thresholds.
• Profiles and diagnostics: legacy profiles and continuous chunks provide thread selection, inclusive/self function summaries, trace links and interactive flame, treemap and sunburst views. Timing and visualization limits are explicit. SDK inventory discovers name/version/platform metadata independently of client reports. Attachments preserve item headers and binary bytes, with text/JSON/raster-image/video previews and downloads; captured HTML and code remain inert. Download Blob URLs retain original MIME types only for allowlisted raster/video media.
• Investigation controls: severity/logger facets, sorting and configurable event metadata; trace search, only-matches, branch collapse and adjustable tree width. Explicit event navigation reconciles active facets. Session-wide Cmd/Ctrl+K search stays independent of the view filter, resizable panes stack on narrow screens, and settings separates appearance from capture history capacity.

For development, pnpm --filter local sample posts nine bundled, sanitized example envelopes through the real receiver. It also replays a custom file or recursive fixture directory, including Spotlight's corpus, with endpoint selection, gzip/Brotli, intervals and repeated passes. Byte-counted fixtures preserve their original bytes on Windows checkouts. See the viewer and replay guide.

Discovery uses a separate capability restricted to loopback and trusted hosted Local origins; it grants neither ingestion nor CLI control. Scoped retention updates require the session stream capability. Hosted viewers cannot delete receiver data or stop captures, and remote HTTPS streams remain read-only. Older receivers connect without discovery; restarting an older daemon to upgrade clears its in-memory telemetry.

The span-v2 handling from Spotlight #1372 is adapted to Toolkit's viewer model, including container validation, typed HTTP attributes and late segment naming. Existing /live and /sdks routes remain compatible, and original envelopes remain inspectable.

Validation: all 322 viewer tests pass, including HTTP/SSE replay, analysis drill-down, binary attachments, filtered navigation, a 150,000-sample profile and Windows checkout regressions. Root typecheck and lint pass. The Local workflow exercises viewer integration and npm/native process E2E on Linux, macOS and Windows. The full local suite still encounters the known macOS musl-installer and DerivedData-scan failures; the unrelated issue-link cache race is unchanged.

The screenshots below show the capture/session flows:

Location	Screenshot
Local › Capture onboarding
Local › Session picker, capturing and saved
Local › Events, request inspector
Local › Logs, structured details
Local › Traces, selected span
Local › Traces, narrow viewport
Local › Saved capture, empty traces
Local › Search this session, explicit view filter
Local › Switch receiver
Local › Capture actions, delete confirmation
Local › Settings, narrow viewport

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Project	Deployment	Actions	Updated
sentry-local	Ready	Preview	Oct 26, 2026 6:24pm UTC