# Telegram forward-ratio recipe

A source-level formula for comparing forwarded and unmarked publications while keeping authorship claims outside the result.

## Calculation

- Mode: source_comparison
- Formula: logical posts with Telegram fwd_from metadata / all logical posts in the same source and publication window.

## Query

For [selected channels] from [start] to [end], count logical posts with Telegram forwarding metadata and calculate their share of all logical posts. Show both counts, the ratio, the common period, zero-post sources, and representative citations. Describe the complement as unmarked, not proven original content.

## Inputs

- **Sources:** Selected channels included in the behavior comparison.
- **Period:** One publication interval shared by all sources.
- **Forward rule:** Presence of stored Telegram fwd_from metadata only.
- **Counting unit:** Logical post after album deduplication.

## Expected output

- Total and forwarded post counts
- Forward ratio by source
- Shared comparison dates
- Explicit zero-post sources
- Evidence and provenance caveat

## Coverage checks

- [ ] Do not infer copying from text similarity
- [ ] Do not call every unmarked post original
- [ ] Use the same dates for every source
- [ ] Deduplicate album parts
- [ ] Verify representative posts before interpretation