# capsules/fonts/

Font capsule for FABRIC.md items 4.3.7/4.3.7b (TrueType rendering, adjunct
to the stroke font — §27.7).

| File | License | Provenance |
|------|---------|------------|
| `JetBrainsMono-Regular.ttf` | SIL Open Font License, Version 1.1 | The JetBrains Mono Project Authors, copyright 2020 (https://github.com/JetBrains/JetBrainsMono). License string confirmed by reading the font's own embedded `name` table directly (`strings -e b JetBrainsMono-Regular.ttf`) — not taken on trust from the filename. |

Chosen as the v1 test/default TTF font 2026-08-10 (FABRIC.md §27.7 "Update
2026-08-10"), resolving that item's licensing-check blocker.

**Embedded as a raw-binary capsule, not text-encoded.** `tools/mkcapsule.c`'s
`process_file()` reads any regular file under `capsules/` as raw bytes and
only runs the 64-char/16-line `.4th` text-block validation
(`validate_forth_blocks()`) when the filename ends in `.4th` — everything
else, including this `.ttf`, is stored byte-for-byte in the generated
`capsule_arena[]` and content-hashed (xxHash64) exactly like every other
capsule. Capsule name: `fonts:JetBrainsMono-Regular.ttf` (colon-separated
relative path, per `build_capsule_name()`). Fetch it with
`capsule_find_by_name()` (`include/starkernel/capsule.h`) — that returns
`offset`/`length` into the arena without ever routing through
`capsule_exec_payload()`, so nothing tries to interpret the font bytes as
FORTH source. This superseded FABRIC.md §27.7 decision #3 (hex/base64
text-encoding) — see that section's 2026-08-10 correction note.

No SIL OFL 1.1 full license text is bundled here yet — only the font's own
embedded attribution string. Add the full `OFL.txt` alongside this file if/
when redistribution requirements are checked in detail (OFL requires the
license text to accompany the font).