# System Flow Diagrams — Index

The canonical Mermaid sequence diagrams + flowcharts for every system flow live in the single source of truth `_docs/02_document/system-flows.md`. This index file exists so the `diagrams/` directory has a discoverable per-flow entry point matching the artifact-management convention; **do not duplicate Mermaid bodies here** — keep them in `system-flows.md` so they cannot drift.

## Per-flow links

| Flow | Description | Section in `system-flows.md` |
|------|-------------|------------------------------|
| F1 | Pre-flight cache provisioning | `## Flow F1: Pre-flight cache provisioning` |
| F2 | Takeoff load (cold-start TTFF, AC-NEW-1) | `## Flow F2: Takeoff load` |
| F3 | Steady-state per-frame estimation (the F3 hot path) | `## Flow F3: Steady-state per-frame estimation` |
| F4 | Mid-flight tile generation + local cache write | `## Flow F4: Mid-flight tile generation + local cache write` |
| F5 | Visual blackout + spoofed-GPS failsafe (AC-NEW-8) | `## Flow F5: Visual blackout + spoofed-GPS failsafe` |
| F6 | Sharp-turn / disconnected-segment re-localization | `## Flow F6: Sharp-turn / disconnected-segment re-localization` |
| F7 | Spoofing-promotion via EKF source-set switch (AC-NEW-2) | `## Flow F7: Spoofing-promotion via EKF source-set switch` |
| F8 | Companion reboot recovery | `## Flow F8: Companion reboot recovery` |
| F9 | GCS telemetry stream (AC-6.1) | `## Flow F9: GCS telemetry stream` |
| F10 | Post-landing tile upload (D-PROJ-2 contract) | `## Flow F10: Post-landing tile upload` |

Each section in `system-flows.md` contains: description, preconditions, Mermaid sequence diagram, Mermaid flowchart, data-flow table, error scenarios, and performance expectations.

## Component-level diagram

The component-level diagram (showing component boundaries and inter-component edges) is `_docs/02_document/diagrams/components.drawio`. It is the visual companion to the per-component specs under `_docs/02_document/components/`.

## Conventions reminder

Per `.cursor/skills/plan/templates/system-flows.md` § Mermaid Diagram Conventions:
- Component-named participants (e.g. `participant C5 as C5 StateEstimator`).
- camelCase node IDs.
- `{Question?}` decisions, `([label])` start/end, `[[label]]` for external systems.
- No inline styling.

If a new flow Fn is added, insert it in `system-flows.md` AND add a row above. Do NOT create separate flow files unless the project later decides to split `system-flows.md` per flow (in which case this index becomes the table of contents and the Mermaid bodies move).