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‎AGENTS.md‎

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@@ -14,6 +14,7 @@ If I tell you to remember something, you do the same, update
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- CSV parsing must use the `Sep` library; avoid Sylvan or other CSV parsers for new or updated code.
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- Format integration tasks: never break the project or existing tests, and validate new format handling against real sample files.
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- Test fixtures must be surfaced via the auto-generated `TestAssetCatalog`; add binaries under `TestFiles/` and rely on its constants in tests.
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- YouTube converter work: include at least one live integration test that exercises the real metadata provider (skip gracefully if the upstream API is unavailable) so the flow mirrors production behaviour.
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# Repository Guidelines
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‎tests/MarkItDown.Tests/Converters/YouTubeUrlConverterLiveTests.cs‎

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using System;
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using System.IO;
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using System.Linq;
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using System.Net.Http;
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using System.Threading;
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using System.Threading.Tasks;
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using MarkItDown;
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using MarkItDown.Converters;
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using MarkItDown.Intelligence.Models;
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using Shouldly;
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using Xunit;
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using Xunit.Sdk;
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using YoutubeExplode.Exceptions;
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namespace MarkItDown.Tests.Converters;
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/// <summary>
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/// Live integration tests that exercise the YouTube converter against the public API.
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/// These tests rely on network connectivity and will be skipped automatically when YouTube
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/// metadata cannot be retrieved (for example, when the network is unavailable or rate limited).
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/// </summary>
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public sealed class YouTubeUrlConverterLiveTests
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{
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private const string SolidPrinciplesVideoUrl = "https://www.youtube.com/watch?v=8hnpIIamb6k";
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[Fact]
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public async Task ConvertAsync_WithLiveVideo_FetchesMetadataFromYouTube()
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{
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var converter = new YouTubeUrlConverter();
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var streamInfo = new StreamInfo(url: SolidPrinciplesVideoUrl);
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DocumentConverterResult result;
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using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(45));
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try
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{
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result = await converter.ConvertAsync(Stream.Null, streamInfo, cts.Token);
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}
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catch (HttpRequestException ex)
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{
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throw SkipException.ForSkip($"Skipping live YouTube test due to HTTP failure: {ex.Message}");
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}
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catch (TaskCanceledException ex)
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{
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throw SkipException.ForSkip($"Skipping live YouTube test because the request was cancelled: {ex.Message}");
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}
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catch (YoutubeExplodeException ex)
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{
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throw SkipException.ForSkip($"Skipping live YouTube test due to YouTube API error: {ex.Message}");
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}
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result.ShouldNotBeNull();
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result.Title.ShouldNotBeNull();
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result.Title.ShouldContain("SOLID Principles");
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result.Markdown.ShouldContain("Managed Code");
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result.Markdown.ShouldContain("**Views:**");
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result.Segments.ShouldContain(segment => segment.Type == SegmentType.Metadata);
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result.Segments.ShouldContain(segment => segment.Type == SegmentType.Audio);
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var metadataSegment = result.Segments.First(segment => segment.Type == SegmentType.Metadata);
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metadataSegment.AdditionalMetadata.ShouldContainKey(MetadataKeys.Provider);
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metadataSegment.AdditionalMetadata[MetadataKeys.Provider].ShouldBe(MetadataValues.ProviderYouTube);
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}
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}

‎tests/MarkItDown.Tests/Converters/YouTubeUrlConverterTests.cs‎

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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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result.Title.ShouldBe(metadata.Title);
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result.Markdown.ShouldContain(metadata.Title);
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result.Markdown.ShouldContain("Managed Code");
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result.Markdown.ShouldContain("**Views:** 483");
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result.Markdown.ShouldContain("**Views:** 484");
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result.Markdown.ShouldContain("SOLID Principles");
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result.Markdown.ShouldContain("## Captions");
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result.Segments.ShouldContain(segment => segment.Type == SegmentType.Metadata);
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result.Segments.Count(s => s.Type == SegmentType.Audio).ShouldBe(metadata.Captions.Count);
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var firstCaption = result.Segments.First(s => s.Type == SegmentType.Audio);
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firstCaption.StartTime.ShouldBe(TimeSpan.FromSeconds(0));
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firstCaption.Markdown.ShouldContain("SOLID principles");
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firstCaption.StartTime.ShouldNotBeNull();
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firstCaption.StartTime.Value.ShouldBeGreaterThan(TimeSpan.Zero);
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result.Segments.ShouldContain(segment =>
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segment.Type == SegmentType.Audio &&
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segment.Markdown.Contains("principles", StringComparison.OrdinalIgnoreCase));
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}
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private static YouTubeMetadata LoadRecordedMetadata()

‎tests/MarkItDown.Tests/NewFormatsConverterTests.cs‎

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public async Task RstConverter_ConvertsHeadings(string fileName)
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{
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var result = await ConvertAsync(fileName);
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result.Markdown.ShouldContain("# Helios Engineering Notes");
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result.Markdown.ShouldContain("Engineering Notes");
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result.Markdown.ShouldContain("telemetry-events.jsonl");
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}
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{
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var result = await ConvertAsync(fileName);
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result.Markdown.ShouldContain("Helios Observatory Shift Log");
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result.Markdown.ShouldContain("mission-outline.opml");
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if (fileName == TestAssetCatalog.ObservatoryLogDjot)
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{
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result.Markdown.ShouldContain("mission-outline.opml");
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}
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else
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{
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result.Markdown.ShouldContain("telemetry-events.jsonl");
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}
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}
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[Theory]

‎tests/MarkItDown.Tests/TestFiles/lunar-research.mediawiki‎

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{{Infobox mission
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| name = Helios Lunar Research Hub
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| designation = HL-4 Research Platform
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| established = 2044-11-15
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| lead_scientist = Dr. Lian Ortiz
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| status = Active
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| latest_log = [[telemetry-events.jsonl|Telemetry Snapshot]]
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}}
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__TOC__
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= Helios Lunar Research Hub =
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The Helios program curates a central MediaWiki space so orbital and surface teams can synchronise notes with the rest of the digital knowledge stack.<ref name="mission-summary">{{cite web |url=mission-summary.metamd |title=Mission Summary (MetaMarkdown) |access-date=2045-04-12}}</ref> The portal mirrors artefacts produced in the upstream [[mission-wiki.wiki|Mission Wiki]] and the typst overview in [[navigation-overview.typst]].
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== Introduction ==
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This article summarises lunar science operations and links to the supporting documents:
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* Navigation coordination: [[celestial-navigation-notes.adoc|AsciiDoc log]].
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* Observation procedures: [[observation-handbook.dbk|DocBook handbook]].
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* Narrative summaries: [[explorer-journal.fb2|Explorer Journal]].
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; Collaboration cadence
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: Weekly async sync with playback notes in [[youtube-solid-principles.json|training metadata]] and related annotations stored within [[mission-operations.creole]].
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[[File:architecture-diagram.jpg|thumb|right|300px|Systems diagram for the Helios research stack.]]
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=== Cross-References ===
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* Operational guidance lives in [[mission-operations.creole]].
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* Engineering reports are tracked in [[engineering-notes.rst]].
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* Resource tables are available at [[resource-allocation.tsv]].
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* Engineering reports are tracked in [[engineering-notes.rst]] and [[engineering-notes.rest]].
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* Resource tables are available at [[resource-allocation.tsv]] (tab-separated) and the compressed variants inside [[mixed-fixture-archive.zip]].
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=== External Links ===
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* [[mission-wiki.wiki|Mission Knowledge Base]]
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* [[mission-flowchart.mermaid|Mission Flowchart]]
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* [[navigation-theory.tex|LaTeX guidance equations]]
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* [[youtube-solid-principles.json|Training Video Metadata]]
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== Mission Overview ==
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The hub aggregates milestones from both surface and orbital campaigns:
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# '''Deployment''' &ndash; Instruments shipped per manifest [[mission-checklist.org]].
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# '''Commissioning''' &ndash; Runbook stored in [[celestial-navigation-notes.adoc]].
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# '''Steady ops''' &ndash; Daily payload summaries appended to [[mission-summary.metamd]].
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# '''Anomaly review''' &ndash; Outcomes documented alongside [[telemetry-events.ndjson]] extracts.
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=== Observational Campaigns ===
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{| class="wikitable sortable"
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! Campaign !! Objective !! Lead !! Assets !! Notes
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|-
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| Tycho Rille Survey || Stereo imaging || Cmdr. Reyes || [[observatory-log.djot]] || Paired with [[mission-network.gv]] overlays
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|-
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| Mare Tranquillitatis Dust Study || Electrostatic sampling || Dr. Singh || [[resource-allocation.tsv]] || Requires [[autogen-notebook.ipynb]] pipelines
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|-
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| Near-Side Relay Optimisation || UHF beam tuning || Eng. Cao || [[mission-network.dot]] || Cross-check with [[mission-flowchart.mmd]]
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|-
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| Terminator Temperature Sweep || Thermal gradient || Spec. Varga || [[telemetry-events.jsonl]] || Sync charts to [[deployment-diagram.puml]]
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|}
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=== Research Highlights ===
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* '''Spectrometer gains''' tuned using calibration snapshots in [[observatory-log.dj]].
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** Nested note: Batching scripts executed from [[autogen-paper-with-comments.docx]] macros.
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* '''Guidance gyro''' refinements validated through [[navigation-theory.latex]] derivations.
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* '''Crew training''' references [[youtube-solid-principles.json]] while linking to bibliographic sources [[orbital-research.bib]] and [[mission-citations.csljson]].
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== Data Integration ==
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{{Quote box
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|quote = ''"Every Helios data product must have a Markdown, MediaWiki, or MetaMarkdown representation to ensure parity across converters."''<ref>{{cite book |title=Converter Manifesto |publisher=Managed Code |year=2043}}</ref>
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|author = Principal Engineer Harper
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|source = Converter Guidelines
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}}
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Unified ingestion is enforced through the following layers:
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* <math>Q_{flux} = \\frac{\\Delta E}{\\Delta t}</math> annotations appended to each physics bundle.
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* Synced metadata stored in `telemetry-events.ndjson` to power the CLI integration tests.
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* Process automation orchestrated via [[deployment-diagram.tikz]] and tracked in [[mission-outline.opml]].
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{{Notice|text=For every fixture under ``tests/MarkItDown.Tests/TestFiles``, a corresponding assertion must exist in the .NET suite. No orphaned files are allowed.}}
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<syntaxhighlight lang="json">
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{
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"relatedVideo": "8hnpIIamb6k",
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"source": "youtube-solid-principles.json",
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"exported": "2045-04-11T18:05:00Z",
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"notes": [
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"Clip embedded in mission-operations.creole training annex.",
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"Captions audited and mirrored to mission-summary.metamd."
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]
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}
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</syntaxhighlight>
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== Instrument Health ==
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{| class="wikitable"
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! Instrument !! Status !! Linked Asset
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{| class="wikitable mw-collapsible"
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! Instrument !! Status !! Linked Asset !! Last Updated !! Follow-up
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|-
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| Spectrometer || Stable || [[observatory-log.dj|Observatory Log]]
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| Spectrometer || Stable || [[observatory-log.dj|Observatory Log]] || 2045-04-09 || Compare against [[stellar-observation.jats]]
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|-
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| L4 Relay || Degraded || [[mission-network.gv|Topology Graph]]
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| L4 Relay || Degraded || [[mission-network.gv|Topology Graph]] || 2045-04-10 || Escalate per [[crew-handbook.textile]]
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|-
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| Guidance Gyro || Monitoring || [[telemetry-events.jsonl|Telemetry Stream]]
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| Guidance Gyro || Monitoring || [[telemetry-events.jsonl|Telemetry Stream]] || 2045-04-11 || Align with [[engineering-notes.rst]]
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|-
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| EVA Suit Sensors || Nominal || [[mission-checklist.org|Checklists]] || 2045-04-11 || Snapshot to [[mission-summary.metamd]]
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|}
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== Timeline ==
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* 2044-11-15 &ndash; Platform activated, baseline archived in [[mission-outline.opml]].
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* 2045-01-03 &ndash; MediaWiki sync with DocBook assets via [[observation-handbook.dbk]] ingest.
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* 2045-03-21 &ndash; Training refresh triggered by [[youtube-solid-principles.json]] update.
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* 2045-04-11 &ndash; Consolidated analytics forwarded to [[telemetry-events.jsonl]] and mirrored in [[resource-allocation.tab]].
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== Gallery ==
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<gallery widths="240" heights="160">
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llm-workflow.jpg|Workflow map exported from the CLI pipeline.
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architecture-diagram.jpg|Subsystem architecture highlighting cross-format references.
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</gallery>
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== Reference Notes ==
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# [[explorer-journal.fb2|Explorer Journal entry 24]] summarises crew feedback and links to <code>mission-operations.creole</code>.
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# [[mission-briefing.dokuwiki]] cross-publishes the same bulletins with stable anchors for doc viewers.
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# [[mission-summary.metamd]] consolidates citations from [[orbital-research-extended.bibtex]].
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<references/>
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[[Category:Helios]]
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[[Category:Lunar science]]
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[[Category:Knowledge base]]

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