nteract/semiotic

v3.8.2 Bugfix

This release fixes issues for SREs watching stability and regressions.

Published 10d MCP Data & Storage

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

ai d3 data-visualization nteract react streaming

+1 more

visualization

Summary

AI summary

Fixed MCP accessibility contract inconsistencies across chart schema functions.

Changes in this release

Type	Severity	Summary	CVE
Bugfix	Medium	Fixes MCP accessibility contract inconsistencies across chart APIs. Fixes MCP accessibility contract inconsistencies across chart APIs. Source: llm_adapter@2026-07-17 Confidence: high	—
Bugfix	Medium	Fixes public `getChartSchema` output to include structured component lists and error details. Fixes public `getChartSchema` output to include structured component lists and error details. Source: llm_adapter@2026-07-17 Confidence: high	—

Full changelog

Fixed

MCP accessibility contract. Chart schemas, validation, repair guidance,
accessibility audits, and getChartSchema now consistently expose the
direct title, description, summary, and accessibleTable props.
improveChart returns suggested accessibility prose separately with its
canonical location, while auditChart no longer credits unsupported text.
Public getChartSchema output. The hosted five-tool profile now declares
and returns structured results for component lists, component schemas, and
unknown-component errors, including direct and ChartContainer accessibility
guidance.

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About nteract/semiotic

React data visualization MCP server with 30+ chart types. 5 tools: suggest charts for a dataset, render validated React configs to SVG, diagnose configuration anti-patterns, get component schemas, and report issues.

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Related context

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Earlier breaking changes

v3.8.1 Removed `/healthz` alias; only `GET /health` is supported for health checks.
v3.8.0 Deprecates `GuantletChart` typo alias; use `GauntletChart`. Migration required.
v3.6.0 Changes DifferenceChart to accept 2+ series via top‑2 subselection, adding caveats for extra series.
v3.6.0 Changes AreaChart to a single‑series chart; multi‑series inputs are subselected.