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MIRA supports the following document formats for upload and context injection. All parsing runs in a background worker thread — the UI never freezes.

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Supported formats

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Size limit

The maximum file size per upload is 50 MB. Files exceeding this limit are rejected at upload with an error message.

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Parse status

After upload, each document transitions through these states: When status is Error, hover over the document card to see the error message.

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What gets injected into context

When a document is active in a session, its parsed text chunks are concatenated (respecting the engine’s context limit) and injected into the prompt as:
Multiple documents are concatenated with this separator pattern, in the order they appear in the Document Panel.

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Unsupported formats

Images (PNG, JPEG, GIF, SVG), audio, video, Excel (.xlsx), PowerPoint (.pptx), and compressed archives are not supported. For Excel files, export to CSV first.
For large PDFs, only the most relevant chunks are injected to stay within the context budget. Use the chunking settings in Settings → Engine to tune chunk size and overlap.